DXF Table of Contents Contents - Kellyco Metal DetectorsUnravel loop cable and wind the cable around...

1

DXF® Table of Contents

Assembly .......................................................................................................................................................................................... 2Batteries ........................................................................................................................................................................................... 4DXF™ Quick Start .......................................................................................................................................................................... 8Basic Adjustments ........................................................................................................................................................................ 14

1. Target Volume............................................................................................................................................................. 182. Audio Threshold ......................................................................................................................................................... 183. Tone (Audio Frequency) ............................................................................................................................................ 194. Audio Disc. ................................................................................................................................................................. 195. Silent Search ............................................................................................................................................................... 206. Mixed Mode ............................................................................................................................................................... 217. A.C. Sensitivity .......................................................................................................................................................... 228. D.C. Sensitivity .......................................................................................................................................................... 229. Backlight .................................................................................................................................................................... 23

10. Viewing Angle ............................................................................................................................................................ 24Pro Options ................................................................................................................................................................................... 25

Audio ......................................................................................................................................................................................... 271. Ratchet Pinpointing .................................................................................................................................................... 272. S.A.T. Speed ............................................................................................................................................................... 283. Tone I.D. ..................................................................................................................................................................... 294. V.C.O. ......................................................................................................................................................................... 295. Modulation ................................................................................................................................................................. 30

G.E.B./Trac ............................................................................................................................................................................... 306. AutoTrac® ..........................................................................................................................................................................................................................................................................................317. Trac View ................................................................................................................................................................... 318. Trac Speed .................................................................................................................................................................. 329. Trac Offset .................................................................................................................................................................. 33

10. Trac Inhibit ................................................................................................................................................................. 3311. Coarse G.E.B. ............................................................................................................................................................. 3412. Fine G.E.B. ................................................................................................................................................................. 35

Discrimination .......................................................................................................................................................................... 3613. Disc. Edit .................................................................................................................................................................... 3614. Block Edit .................................................................................................................................................................. 3815-16. Learn Accept/Reject .............................................................................................................................................. 3917. Recovery Speed.......................................................................................................................................................... 4018. Bottlecap Reject ......................................................................................................................................................... 4119. Hot Rock Reject ......................................................................................................................................................... 4220. Sweep Speed .............................................................................................................................................................. 4321. Ground Filtering ......................................................................................................................................................... 44

Display .......................................................................................................................................................................................4522. Visual Disc. ................................................................................................................................................................ 4523. Icons ........................................................................................................................................................................... 4524. V.D.I. Sensitivity ........................................................................................................................................................ 4625. D.C. Phase .................................................................................................................................................................. 4726. Accumulate ................................................................................................................................................................. 4827. Average ....................................................................................................................................................................... 4828. Fade ............................................................................................................................................................................ 49

Preamp Gain ............................................................................................................................................................................. 5029. Preamp Gain ............................................................................................................................................................... 50

Multi Frequency Method......................................................................................................................................................... 5130. 2 Frequency (Best Data) ............................................................................................................................................ 5131. 2 Frequency (Correlate) ............................................................................................................................................. 5132. V.D.I. Normalization .................................................................................................................................................. 5233. 1 Frequency (3 kHz) .................................................................................................................................................. 5234. 1 Frequency (15 kHz) ................................................................................................................................................ 52

EEPROM Programs ................................................................................................................................................................ 53-54Program Settings Chart .......................................................................................................................................................... 55-56Glossary ......................................................................................................................................................................................... 57Warranty .................................................................................................................................................................................. 58-59Warranty .................................................................................................................................................................................. 58-59Service .......................................................................................................................................................................................... 60

Contents Page

2

AssemblyChapter 1 DFX™ Assembly

ELBOWCUPSTRAP

ELBOW CUPFOAM PADSINSIDE ELBOWCUP

CONTROL BOX

“S” ROD

LOOPCABLECAMLOCKS

WASHERSBETWEENEACH LOOPEAR & CLEVIS

DISPLAY1/ PRESET PROGRAMS2/ BASIC ADJUSTMENTS3/ PRO OPTIONS4/ TARGET ID NUMBERS5/ TARGET ID ICONS6/ TARGET ID SIGNAGRAPH®

7/ BATTERY STRENGTH

CABLE RETAINERS

BATTERYCOMPARTMENTDOOR

BATTERYCOMPARTMENTLATCHES

LOOP CONNECTOR

HEADPHONEJACK

CLEVISLOWER

ROD

TOUCH PADSSELECT PROGRAMSADJUST CONTROLS

LOOP OR SEARCHCOIL

Trigger behind display activatesdepth reading and

pinpoint mode.

COIN PROGRAMSQUEEZE & RELEASE TRIGGERAFTER BATT. CHECK.SCROLL OPTIONSATER BATT. CHECK USETO SCROLL CURRENT SETTINGSOR MAKE ADJUSTMENTS

GROUND BALANCE ONLYWHILE SEARCHING HOLD THETRIGGER AND PRESS

BATTERY CHECKWHILE SEARCHING, HOLD THETRIGGER AND PRESS

REVERSE DISPLAYWHILE SEARCHING. HOLDTHE TRIGGER AND PRESS

PRESS FORLIGHT/DARK BACKGROUND.RELEASE TRIGGER

BACKLIGHTIN SEARCH MODE, HOLD THETRIGGER AND PRESSRELEASE TRIGGERPUSH

AIR/GND BALANCEIN SEARCH MODE PRESSTO RE-AIR/GND BALANCE

VIEW ANGLEWHILE SEARCHING HOLDTHE TRIGGER AND PRESSRELEASE TRIGGERPUSH

"HOT KEY" SHORTCUTS"X" "X"

Remove decal paper from the two rubberbumpers. Install on the bottom of the controlbox, one in each of the front corners (shownbelow by "X"). Press in place and hold firmlyfor a few seconds then release.

BOTTOM OFCONTROL BOX

Twist and insert each end ofhandle (provided) through topof shipping carton intosecond flap.(CARRY CARTON)

3

Chapter 1 DFX™ Assembly

readjust clevis/lower rod length with the springclip buttons so that the search coil can be held nearthe floor without requiring stooping over.

7. Remove the protective paper from the two blackelbow cup foam pads. Carefully align pads on theinside of the elbow cup, one on each side of thecenter rod, and press firmly into place.

8. Adjust the elbow cup strap so that it is looseenough for you to slide your arm in and out with-out loosening each time you want to set the detec-tor down. The elbow cup strap provides extraleverage and control. However, some prefer not touse it.

9. Install battery as described in the next section,decal facing down, with plastic tab and steel contactsfacing toward inside of battery compartment.

10. It should be noted at this point that the detectormay not work as expected indoors due to the highdegree of metals used in modern construction. It isbest to tune and practice out-of-doors to ensurestable, predictable results. Additionally, freshly-buried targets will not produce the normal depthand discrimination results of targets that have beennaturally lost and settled in the ground. Due to theabnormality caused by digging a hole in the groundmatrix, and the sophistication of the ground rejec-tion circuitry, it may take a number of years forfreshly-buried targets to respond at true depths anddiscrimination accuracy. The best way to deter-mine true detection depth is in real search condi-tions.

Assembly Instructions1. Remove all parts from shipping carton andcheck the assembly page to make sure all parts arepresent.

2. There are rubber washers between clevis/lowerrod and loop ears. Use only nonmetallic washers,fiber bolt, and thumbnut to secure loop/searchcoil to clevis/lower rod.

3. Unlock "S" rod camlock and insert clevis/lower rod into curved "S" rod so that stainlesssteel spring clip buttons line up and lock into oneof the adjustment holes in the curved "S" rod.Turn camlock to secure. The second or thirdadjustment holes are suitable for average sizeadults. Individuals 6' or taller should use the fullyextended position. Individuals well over 6' tallshould purchase the optional Tall Man Rod.

4. Unravel loop cable and wind the cable aroundthe clevis and rod assembly, first revolution overthe top of the rod. Wind cable all the way to thetop of the curved "S" rod, about five revolutions.Use the black cable retainers, one near the loop,and one near the top of the curved "S" rod, to holdthe loop cable in place.

5. Unlock control box rod camlock and insertcurved "S" rod so that stainless steel spring clipbuttons line up and lock into the rod on top of thecontrol box. The "S" rod is designed to curve uptoward the display. However, those who prefer tosweep the loop close to their feet may desire toassemble the "S" rod to curve down toward theground. Turn camlock to secure. Plug loop con-nector into control box, screw lock ring to secure.

6. Grip the instrument by the handle, with your arm inthe elbow cup with strap secure, and sweep the loop/search coil over the floor. If the instrument fit feelsuncomfortable, adjust the elbow cup by removingand repositioning the bolt/thumbnut and installingin one of the optional positions. If necessary,

4

BatteriesChapter 2 DFX™ Batteries

CAUTION

Battery Holder #802-7150

LIFT TAB AND PULL

Standard Battery Holder

1. The standard battery holder (blue decal) holdseight “AA” cell batteries. Alkalines are recom-mended for use with this battery holder.

2. Non-alkaline batteries can be used in this holder.When non-alkalines or rechargeable “AA”cells are used, detecting time (before replacement/recharge) may be reduced.

3. "LOW BAT" will automatically appear on thedisplay when the batteries become too low toproperly operate the detector.

4. The battery compartment opens by gentlypulling down on the front of each of the twolatches (on the bottom of the control box) releasingthe catch and hinging open the door.

The non-rechargeable battery holder can use manydifferent types of batteries, including rechargeable.This holder is designed for standard size penlight"AA" batteries which should be 50 mm ± .10mm.Battery lengths shorter than this will likely causeproblems with this power supply.

When the instrument is turned on the battery volt-age will momentarily appear after the openingdisplay. The detector will then continue to theMAIN MENU . To recheck the battery voltageduring operation, squeeze and hold the TRIGGERand press the ARROW DOWN control.

BATTERY CHECK

VOLTSNICAD ALK

6 LOW OK 14.0

ARROW DOWN

TRIGGERUNDERDISPLAY POD

BLUE DECAL

5

Chapter 2 DFX™ Batteries

Rechargeable Battery

A rechargeable battery (green decal) is providedwith your instrument. This battery can be rechargedhundreds of times as long as the battery hasn't beenstored for extended periods of time or overcharged.Full charge can be achieved anytime during thedischarge cycle. When using the QUICK chargesetting use the Charging Hours chart on the follow-ing page for charge time. A full charge will last tento fifteen hours of normal use.

Battery life will vary with temperature, the numberof targets found, and the exact settings used. Sixhours is not unusual for extreme high performancesettings, backlight use, or for batteries that haveexperienced extensive use.

Your charger has a switch on it that selects theQUICK charge, or OVERNIGHT charge options.Always check the position of this switch prior tocharging. Always follow the charge hours on thechart on the following page when the QUICKcharge setting is used. Overcharging with theQUICK charge setting will damage the system.

CAUTIONBattery #802-5211

Using theStandard Battery Holder1. Slide open the battery holder lid (decal side ofbattery holder) by applying gentle upwardpressure on the tab of the door so that it unlocks.Slide the door away from the battery boxexposing the cell positions.

2. Remove any old cells from the holder. Note the(+) and (-) positions of each cell and the (+)and (-) for each position marked inside the cell tray.Install new “AA” cells noting carefully the cor-rect (+) and (-) positions.

If the cells are installed incorrectly, the detectormay require service by an AuthorizedService Center.

3. Slide the door closed so that it snaps securely.

4. Insert the battery holder into the detector so thatthe decal is facing down, with the batteryholder door tab and metal contact points facingtoward the inside of the battery compartment.

Close the battery compartment door and secure thetwo latches on the bottom of the case. Hook thefront of each latch first, then press down on therear.

QUICKCHARGEOR OVER-NIGHTSWITCH

GREENDECAL BATTERY

CHARGER

BATTERYCOMPARTMENT DOOR

BATTERY HOLDERWITH DECAL SIDE DOWN ANDMETAL CONTACTS TO FRONT

CHARGER PLUG

6


6. The battery will lose its charge during storage.If stored inserted in your instrument, this loss willbe more noteworthy. It is recommended that thebattery be removed from the instrument duringperiods of storage. It is not advisable to storerechargeable batteries for long periods of timewithout use. If however, storage is necessary, storewithout a charge (discharged).

7. Do not discharge the battery in devices otherthan your metal detector. Unnecessary dischargingand/or an absolute discharge will reduce battery lifeand may damage the battery. Unlike older recharge-able battery designs, the rechargeable batteryprovided with your detector can be recharged at anytime. Regardless of whether or not it already has apartial charge, memory will not occur.

8. White's has provided the leading edge of re-chargeable battery technology with your instru-ment. Disregard all advice which conflicts with theabove recommendations. Care for batteries pro-vided by other manufacturers, or with other White'smodels, may vary.

Charging 1. There is no harm charg-ing overnight using theOVERNIGHT chargesetting regardless of thebattery's current condition.However, before chargingwith the QUICK chargesetting, determine batterycondition by insertingbattery into the instrumentand turning the instrumentON. If the instrument willnot turn ON, or if voltagetests eight volts or below,charge five hours with theQUICK charge. If the battery voltage tests any othervoltage, refer to the Charging Hours chart above forproper QUICK charge time.

2. To charge, insert the charger plug into the batterypack jack, located near the plastic tab andmetal contact points.

3. Plug the charger into a standard wall outlet.(110 volts for USA models).

4. Again, the QUICK charge setting uses the abovechart for a specific charge time. OVERNIGHT isdesigned to charge the battery in as little as fourteenhours. However, no harm will come to the systemleaving it charging for several days.

5. It is normal for the battery and charger to getwarm during use. However, if either the battery orthe charger gets too hot to hold or deforms due tothe heat, discontinue use and return for testing.

13 12 11.5 11 10.5 10 9.5 9 8.5 8 7.5 7 6.5 6

5

4.5

4

3

2.5

2

1.5

1

0.5

0

3.5

Any voltage readingless than 8 volts-charge for 5 hoursmaximum onQuick Chargesetting. Further charging candamage thesystem.

Do not charge untilvoltage reading dropsbelow 10.5 volts.

ChargingHours

Using the Battery Charger on Quick Charge Setting

Battery Voltage Reading

7


Battery Life & MemoryVolatile memory temporarily holds any programchanges or settings not yet saved in a CustomProgram. Short-term or volatile memory is retainedso long as a good battery remains in the detector.To recover volatile memory immediately squeezeand release the TRIGGER once the detector isturned ON. If the battery is removed all volatilememory is lost. Long-term memory (programssaved in Custom Programs) is automatically savedfor up to ten years regardless of whether a battery isin the detector or not.

When using fresh batteries, the voltage will initiallycheck somewhere in the 10 to 14 volt area. Unlikestandard batteries, the rechargeable battery voltagewill quickly drop to between 9 and 10 volts andplateau there for most of its life. Once the recharge-able battery voltage drops below this plateau, it willquickly drop below a usable voltage level (eightvolts) and thus require a recharge. Low Battery willautomatically appear on the display when thebattery reaches eight volts.

Like a personal computer, there are times (such aslow battery conditions) when the microprocessor ofa metal detector becomes out of sequence with therest of the circuitry. This is often noted by pecu-liarities in the nondiscrimination or pinpointing(TRIGGER squeezed) modes. Symptoms may beblaring or silent non-discriminate or pinpointmodes, depth indication inaccuracies or generalabnormal operation. To correct such difficulties "re-boot" by:

1. Install a good battery.2. Turn ON wait for MAIN MENU to appear.3. Open battery door and remove battery while detector is still ON.4. Wait one minute, reinstall battery, turn detector ON, and check for proper function.

Use of maximum backlight may reduce battery lifeby up to 50%, depending on battery type.

Rechargeable batteries gradually deteriorate. Asthey age they do not provide the life-per-chargethey did when new. This is expected, and notgrounds for replacement under warranty. Addition-ally, a damaged initial cell, which is caused byovercharging with the QUICK option, is not re-placed under warranty. Only cell failure throughnormal use, or a defect due to a problem with aWhite's warranted DFX™ charger, is covered.

8

Chapter 3 DFX™ Quick Start

DFX™ Quick Start Instructions After you have assembled the DFX™ and inserted thebattery pack, follow these simple steps to starttreasure hunting!

DFX™ Quick Start

1 With the TRIGGER in the center position,press the ON/OFF control and an automaticsequence will begin.

The display will momentarily show anopening screen which lists the softwareversion.

The display then shows a battery checkscreen.

The last automatic display screen to appearis the MAIN MENU. Press the ENTERcontrol. ("BEEP" )

The Preset Program COINS will appear onthe MENU. Press ENTER . ("BEEP ")

You will be prompted to raise the searchcoil (loop) to waist level. Press ENTER .This air balances the DFX™. ("BEEP ")

Next, the ground balance prompt appearsasking you to lower the search coil (loop) tothe ground. Press ENTER. Ground mineral-ization will be balanced out. ("BEEP ")

The last screen will be the live searchscreen. You will hear the THRESHOLD"hum". Sweep the search coil over theground and listen for a solid repeatable/consistent beep, then look at the display.The icons tell what likely coin lies below.V.D.I. number/chart on top of control boxand SignaGraph® provide greater detail.Squeeze the trigger for pinpointing anddepth and it's time to dig!

2

3

4

TRIGGERUNDERDISPLAY PODCENTERPOSITION

SOFTWAREVERSION #

BATTERY CHECK

VOLTSNICAD ALK

6 LOW OK 14.0

MAIN MENU PG. 1/1PRESET PROGRAMSBASIC ADJUSTMENTSPRO OPTIONS

1 2

3

4

PROGRAMS PG. 1/3COINSCOIN & JEWELRYJEWELRY/BEACH

(press ENTER)

(press ENTER)

5

5

RAISE LOOP TO WAISTLEVEL THEN PRESSENTER

LOWER LOOP TO GROUNDSURFACE THEN PRESSENTER

6

(press ENTER)

6 7

7 8

+84 25¢

-95 +95

(press ENTER)

8

(LIVE SEARCH SCREEN)

9

Chapter 3 DFX™ QuickStart

Search Fundamentals

The loop/search coil must be in motion (sweep-ing from side-to-side) for this instrument torespond to metal. Practice a smooth sweep of theloop from side-to-side keeping the loop close to theground throughout the swing. Each pass of theloop should take approximately two secondsfrom right to left, two seconds to return from leftto right.

Walk forward slowly. Take small steps no greaterthan half normal strides. Make sure each pass of theloop overlaps the last by at least half the length ofthe loop. Do not lift the loop at the end of eachswing. Keep it close to the ground at all times.

To become comfortable with sweeping the looptakes some practice. Try to loosen up and find acomfortable grip on the handle. Premature fatiguemay result from gripping the handle too tightly,improperly adjusted rod or elbow support, andlimited body movement. Hold the handle loosely.Adjust the rod and elbow support for comfort andkeep the elbow strap loose. Use your arm, shoulderand even your back a little to allow a smooth evensweep of the loop.

Now that you're sweeping the loop smoothly over theground, you will notice that the detector starts makingsounds (beeps). Not all sounds are good targets;some trash targets also make the detector beep.

As the loop is swept over the ground, ignore thedisplay and concentrate on the sounds the detectormakes.

As the loop is passed over metal that is likely trash,the sound will be inconsistent. Trash targets typi-cally produce a shorter, sputter-type sound, that isoften broken or double in nature. Place a steel-popbottlecap on the ground. Pass the loop over itseveral times to become familiar with this sound atdifferent loop sweep speeds. Note that an aluminumtwist-off bottlecap cannot be used as it is a differ-ent type of target. Also note that very old rustybottle caps may start reading as quarters due to theelimination of the iron alloy through deterioration.Once familiar with the sound typical bottle capsproduce, an operator may pass over such targets andcontinue searching without consulting the displayinformation, saving more time for evaluatingpossible good targets.

As the loop passes over metal that is likely a goodtarget, a more consistent and smooth sound will beheard. A good target typically produces a longer,more solid sound. Place a quarter on the ground andsweep the loop over it several times to becomefamiliar with the sound of a good target.

Why Air/Ground Balance?When the display prompts you to AIR BALANCE byholding the loop at waist level and press ENTER. TheDFX™'s circuits are being prepared for ground balanc-ing by measuring temperature and other variables thataffect electronic circuits. The DFX™ "beeps" and youlower the search coil to the distance above the groundthat you will be searching. Press ENTER to have theDFX™ "cancel/track out" or GROUND BALANCEthe ground mineralization. The DFX™ then automati-cally "tracks out" the varying mineralization as youcontinue to search.

10


Live Search Screen - what is it telling me?VISUALDISCRIMINATIONINDICATION-V.D.I. NUMBER("TARGET REFERENCE NUMBER")

POSSIBLE TARGET IDENTITIES("ICONS")

SIGNAGRAPHBARGRAPH

1. V.D.I. Visual Discrimination Indication("target reference number")In the upper left hand-side of the display there is aV.D.I. number that corresponds to the V.D.I.SCALE painted on the top right-hand side of thecontrol box. It also corresponds to the DiscriminateEdit feature allowing you to reject or accept targetsbased on their V.D.I. reference number. There are"+" numbers for nonferrous (not of iron) targets,and "-" numbers for ferrous (iron) targets. RejectedV.D.I. numbers may not appear if the VISUALDISCRIMINATION feature is ON. Reasonablyconsistent V.D.I. reference numbers (± five digits),in a desirable area of the chart is a vote for diggingthe target.2. Possible Target Identities ("Probable or mostlikely target")To the right of the V.D.I. number, possible targetidentities will be represented graphically. Thesegraphics are called ICONS. A fairly consistentindication of a desirable target is another vote to digthe target. One or two possible target icons mayappear. There is significance to which icon appearsfirst. The first target to appear is always the mostlikely, the second is another possibility, slightly lesslikely than the first.3. SignaGraph®

The SignaGraph® at the bottom of the displayprovides a final vote as to whether or not the targetshould be dug.

+48

-95 +95

A. Sweep the loop over the target several times andlook at the SignaGraph®. The SignaGraph® auto-matically clears itself (FADE RATE) so that itdoesn't fill the screen with information from pastloop sweeps. An operator has limited time to lookat the SignaGraph®. If you want to look at theinformation again, sweep the loop over the targetseveral more times. The fading of the SignaGraph®

information can be slowed or speeded (FADERATE) to operator preference. This is completed inthe PRO OPTIONS under DISPLAY. AutomaticAVERAGING and/or ACCUMULATING ofSignaGraph® information is also available (SeePRO OPTIONS).

B. Valuable targets will show up on the positiveside of the graph. The positive area of the chart isthe section located to the right of the zero.

C. Look for consistency. In ideal conditions, coinsand jewelry produce one or two bars to the right ofzero. Trash produces several bars, sometimes onboth sides of zero.

D. In less than ideal conditions, coins may producea wider pattern of bars. Most trash targets produce arecognizably different pattern than valuable targets.

E. One of the most visual benefits of theSignaGraph® is the ability to show a smear patternon iron targets that often fool the other methods ofidentification. An iron target will likely showdefinite bars on both the negative and positive sidesof the SignaGraph®, often smearing all the wayacross the entire chart. Valuable targets should notproduce such obviously wide patterns. In very badground conditions, a good target may have a fewsmall bar segments in the negative area due tomineralization. However, the pattern will showmostly positive bars, in a fairly narrow tall group.

MULTIFREQUENCYMETHOD

CURRENTLY INUSE

11


Live Search Screen Samples

+19 5¢

-95 +95

+78 1 10¢ ¢

-95 +95

+84 25¢

-95 +95

+93 1$

-95 +95

-95 +95 -95 +95

+95

-18

-95 +95

+10

-95 +95

FOIL

+30

-95 +95

+48

-95 +95

Nickel, orpossible ring.Sometimes asmall (or half)pull tab willproduce thisindication

Quarter. Couldbe a worn half,or large silverjewelry.

Penny or adime. If thescrew cap andpenny ICONare displayed,the targetcould be anIndian Head orzinc penny.

Dollar. Largenon-iron canalso producethis indication(large brass jarlids).

IRON. REJECTtargets willproduce only aSignaGraph® ifVISUAL DISC.is ON

IRON. +95ACCEPTED orVISUAL DISC.OFF

IRON. -18ACCEPTED orVISUAL DISC.OFF.

Foil. Possiblering. +10ACCEPTED orVISUAL DISC.OFF.

Pull tab.Possible ring.+30 AC-CEPTED orVISUAL DISC.OFF.

Ring. Possiblepull tab. +48ACCEPTED orVISUAL DISC.OFF.

12


Pinpointing the TargetOnce the decision has been made to dig, move theloop off to one side of the target area, squeeze andhold the TRIGGER on the handle, and "X" the loopover the spot where you believe the target to be.Note that the TRIGGER also has a locked forwardposition that accomplishes the same thing assqueezing and holding it.

While the TRIGGER is being held, the loop doesn'tneed to be moving to detect the target. The loopmay be moved slowly over the area. The displaywill indicate depth in inches and will also show thestrongest reading to aid in pinpointing exactlywhere to dig. The shallowest reading on the depthdisplay, the loudest sound coming from the speaker,and the two bars lining up with each other, indicatethe center of the target. Don't forget to "X" thetarget as pinpointing cannot be accurate unless thetarget is swept from at least two different directions.Once pinpointing is complete, release the TRIG-GER, or return it to the center position.

Pinpointing takes practice. The standard loopprovided with the DFX™ is a high-powered, 9.5inch design. This harmonically tuned loop's stron-gest traits are in the detection depth and groundcoverage areas. If pinpointing becomes difficult orcritical refer to the Advanced Pinpointing Tech-niques on this page.

10.5"

+ - 1 2 - + - + - 9 - + - + - 6 - + - + - 3 - + - + - 0+ - 1 2 - + - + - 9 - + - + - 6 - + - + - 3 - + - + - 0

DEPTH SCREENDISPLAYED WHEN

THE TRIGGERIS SQUEEZED

SQUEEZE TRIGGER

Advanced Pinpointing Techniques

1. Targets that are near the surface, becausethey give a wider response, are harder topinpoint than deep targets. If the trigger is heldand the loop swept over the area, you may notea shallow depth indication. Lifting the loopslightly above the ground, releasing and re-squeezing the TRIGGER and again "X" ing thetarget will aid pinpointing.

2. In the Basic Adjustments, DC Sensitivity(non-motion) directly controls the pinpointingmode. Lower DC Sensitivity settings pinpointshallow targets better.

3. In the PRO OPTIONS under AUDIO, V.C.O.(Voltage Controlled Oscillator) significantly aidspinpointing.

4. The depth reading has two indication bars.The top bar shows the current distance fromthe target, and the bottom bar shows a memoryof the strongest reading. These two bars will beeven with each other when the loop is directlyover the center of the target.

"X" THE LOOP TO "PINPOINT"THE TARGET

13


Ready to DigPermission - Prior to searching and digging youmust have permission to search private property,from the owner or caretaker.

Laws - Know the laws that apply to the area youare going to search. Laws vary a great deal with theCity, County, State, and Country, regarding the useof metal detectors. Be respectful of private prop-erty, public property, and the laws which governthe use of metal detectors.

Tools - Care must be taken to dig in a way that isfriendly to the landscape. Tools and methods vary agreat deal with the area, season, and types of targetyou are recovering. Check with your dealer forrecommended tools and methods for your area.

Trash - When searching, remove all trash youcome across. This not only makes your futuresearches of the area more productive; it promotesthe hobby of metal detecting.

Get Involved - Your dealer knows of metal detect-ing clubs and organizations which promote andprotect the hobby. A club is a great way to not onlylearn good detecting habits, but to gain permissionto search areas as a group as well as have organizedcompetition hunts.

Factory Preset ProgramsReached from the MAIN MENU, the factoryPRESET PROGRAMS give a quick start for:

Coins: general purpose settings, discriminates(rejects) most common junk items like nails, foil,pull tabs, and hot rocks; and responds to most coinsand large jewelry. Use in lawns, parks, and play-grounds where lots of trash rejection is desired.

Coin & Jewelry: less discrimination (less trashrejection), desirable because of the high degree ofvariance found in jewelry alloys. More diggingrequired. Good program for lawns, parks, andplaygrounds. Use screen in conjunction with sound.

Jewelry & Beach: similar to Coin & Jewelry, butsettings are optimized for salt water.

Relic: even less discrimination than Coin & Jewelryor Jewelry & Beach, all types of metals exceptsmall iron items like nails, and some stainless steel.Brass, lead, aluminum, as well as copper, silver,and gold all respond solidly. Ferrous (iron), such aslarge nails, weapons, and cannon ball fragmentswill also respond . Suitable for all significant targetsand separates ferrous/nonferrous by display indica-tions.

Prospecting: NO AUDIO DISCRIMINATION. Allmetals respond with beep. But V.D.I. numbersshow only for metals that could be gold. Dig onlyV.D.I. number (possibility gold) targets and avoidiron. Targets which cause an audio response, with-out causing a V.D.I. number to appear on thedisplay, are not likely to be gold nuggets. Althoughhigh-frequency gold-shooting detectors will re-spond better, this mode will offer good results forthe occasional nugget hunter by responding tonuggets in the six-grain and heavier category.

14

Chapter 4 DFX™ Basic Adjustments

Basic Adjustments


Basics of Basic AdjustmentAfter you have had some field experience, you maywant to make some changes to the basic settings ofyour detector. From the search mode pressMENU . At this point, the MAIN MENU willappear on the display. Use the ARROW controls tomove the pointer to Basic Adjustments, and thenpress ENTER. You may now use the ARROWdown control to scroll through the Basic Adjust-ments.

Using the first adjustment screen (TARGET VOL-UME) as an example, the screens with a graphiccontrol knob require you to first press ENTERthen use the ARROW up and down controls toadjust. Note: when ENTER is pressed the squarearound the title moves to the setting, indicating youare ready to make adjustments with the ARROWcontrols. After adjusting press MENU and use theARROW controls to continue viewing/setting otherBasic Adjustments, or squeeze and release theTRIGGER to begin searching

Adjustment screens with an on/off selection needonly for you to press ENTER to change setting.Pressing ENTER again changes back to the originalsetting.

56TARGET VOLUME

MIN MAX

56TARGET VOLUME

MIN MAX

(press ENTER)

(press ENTER)

RECTANGLE AROUNDTHE TITLE MOVES TO

THE SETTING

USE ARROW KEYS TOADJUST THE SETTING

UP OR DOWN

ADJUSTMENTEXAMPLE:

TIP - To quickly increase tomaximum, hold ENTER andpress ARROW up. To quicklydecrease to minimum, holdthe ENTER and pressARROW down.

SILENT SEARCH ON OFF

TO CHANGE PRESS ENTER

ADJUSTMENTEXAMPLE:

1. TARGET VOLUME - How loud a target beeps when detected.2. AUDIO THRESHOLD - The slight hum or background sound heard continuously during searching.3. TONE (AUDIO FREQUENCY) - Selects the frequency or pitch of sound the detector produces.4. AUDIO DISCRIMINATION - The ability to reject trash, different sounds for different types of targets.5. SILENT SEARCH - The ability to operate without the threshold or background hum.6. MIXED-MODE - DC non-discriminate mode, working simultaneously with AC discrimination mode.7. A.C. SENSITIVITY - Degree instrument is responsive to signals in the discriminate (motion) modes.8. D.C. SENSITIVITY - Degree instrument is responsive to signals in non-discriminate (non-motion) modes.9. BACKLIGHT - Used in dark conditions to light the display improving visibility.

10. VIEWING ANGLE - Adjusts the display for low or high temperature visibility.

Basic Adjustments - what do they do?

15


More BasicsAll the MENU items are tied together so that theARROW up and down controls scroll through everyadjustment screen. If you continue to press theARROW down you can go beyond the last BASICADJUSTMENT (View Angle) and into the PROOPTIONS. If the ARROW up control is pressedafter VOLUME, you will be scrolling backwardsthrough the options starting with the end of thePreset Programs, then the MAIN MENU, then theend of the PRO OPTIONS.

An important feature of the ARROW controls; If aBASIC ADJUSTMENT has been made (for ex-ample Volume) and the trigger has been squeezedand released to return to a search mode, you canreturn to the volume adjustment simply by pressingeither of the ARROW controls. This shortcutreturns to the last adjustment that was made therebyallowing an operator to switch directly from asearch mode to the adjustment currently being finetuned. This feature is desirable as you start usingBASIC ADJUSTMENTS or PRO OPTIONS thatare located further down the menu listings, or anyadjustment that may require some trial and error tofind the appropriate setting.

If care is taken to use a desired adjustment screenlast (just prior to squeezing and releasing the TRIG-GER for a search mode), Custom Programs can usethis ARROW RETURN feature to allow quick easyaccess to the most used feature. Use that feature(adjustment screen) last, just prior to squeezing andreleasing the TRIGGER for searching. Then duringsearching, press either ARROW to return directly tothat adjustment screen.

"Hot Key" Shortcuts"HOT KEYS" will save time as they allow easyaccess, from the search mode, to the most neededadjustments. They are painted on the bottom of thecontrol box for field reference. NOTICE: "HOTKEY" shortcuts will not function from a cold start(batteries just installed). To function from a coldstart the DFX™ must be turned on and air/groundbalanced in any mode, then turned off. "HOT KEY"shortcuts will then function.

COIN PROGRAM - Squeeze & release TRIGGERafter automatic battery check.

SCROLL OPTION - After battery check, useARROWS to scroll all the current settings /menus.

AIR/GROUND BALANCE - In search mode,press ENTER to re-Air/Ground Balance.

GROUND BALANCE ONLY - While searching,hold the TRIGGER and press ENTER.

BATTERY CHECK - While searching, hold theTRIGGER and press ARROW down. Squeeze andrelease TRIGGER to return to searching.

REVERSE DISPLAY - While searching, hold theTRIGGER and press ARROW DOWN. PressARROWs for light/dark background. Light or darkbackground will not change battery life. It willmake the display easier for some to read, particu-larly in certain light conditions. It will work incombination with backlight. Reversed display isonly accessible through the "HOT KEYS".

BACKLIGHT - In search mode, hold TRIGGERand press MENU. Release TRIGGER, pressARROWS to set.

VIEW ANGLE - While searching, hold the TRIG-GER and press ARROW up. Release TRIGGER,press ARROWS to set.

16

A. LOAD will activate a prior custom pro-gram stored in that position. After you haveSAVED or NAMED a program, you canselect LOAD and press ENTER, to use thatprogram.

B. SAVE saves your current settings in thatcustom position with either a generic name ora prior custom name you may have applied.Selecting SAVE and pressing ENTER savesthe current program.

C. NAME is the preferred method. SelectNAME and press ENTER. You may now usethe ARROW and ENTER controls to nameyour custom program. NAME automaticallySAVES, once you have chosen a name andpressed MENU.

Custom EEPROM ProgramsSaving Basic and Pro Optionadjustments for future use.Save custom settings in any one of four EEPROMprogram positions. They will remain permanently inthe DFX™ memory regardless if the machine isturned off or the battery removed. CustomEEPROM Programs can be changed at any time bysaving new settings over a previously saved customprogram. EEPROM is a special type of computermemory made for this purpose, (Electrical-Eras-able-Programmable-Read-Only-Memory).


1 SQUEEZETRIGGER

2

PROGRAMS PG. 1/3COINSCOIN & JEWELRYJEWELRY/BEACH

PRESS ENTER FOR PRESET PROGRAMS


PROGRAMS PG. 2/3RELICPROSPECTINGEEPROM DP-SILVER

SCROLL DOWN WITH ARROW KEYS

3

THEN PUSHMENU

EEPROM OPTIONS PG. 1/1LOADSAVENAME

1. Once all of the changes you desire have beenmade to any Preset Program or existing CustomProgram, squeeze and release the TRIGGER as if tosearch.Then push MENU for MAIN MENU.

2. Use the ARROW controls to select one of thefour Custom Programs then press ENTER.

3. You now must make one of three choices (usethe ARROW controls to make your selection):

PROGRAMS PG. 2/3RELICPROSPECTINGTRASHY PARKS

PROGRAMS PG. 2/3RELICPROSPECTINGTRASH

4

PRESS ENTER

USE THE ARROW KEYS TO SCROLL THEFLASHING SYMBOLS, PRESS ENTER

PRESS ENTER

PRESS MENU

1

2

3

17


4. To NAME, use the ARROW controls to select thefirst symbol, number, or letter of the name and pressENTER. Use the ARROW controls to select thesecond symbol, number, or letter of the name, pressENTER. And so on using up to sixteen digits. Toleave a space, use the ARROWS to select the pointwhere no symbol or letter appears and press ENTER.If you make a mistake and press ENTER when thedigit is not as you desire, simply keep pressing EN-TER until that digit is again flashing, then use theARROWs to select the correct digit and again pressENTER. It is wise to name the custom programsomething that relates to what it is used for. Forexample "TRASHY PARKS", "GHOST TOWN","NIGHT HUNT", "COMPETITION", etc. Once thename is fully assembled press MENU.

5. Once you have SAVED and pressed ENTER, orNAMED and pressed MENU, there are four directionsyou can go:

A. Squeeze and release the TRIGGER to con-tinue searching using your new custom program.

B. Press ENTER, select LOAD and pressENTER to continue searching using your newcustom program.

C. Press MENU to return to choose or develop adifferent program than what you stored.

D. Turn the detector OFF.

6. When the detector is turned back on, regardless ofwhether a battery pack was left in the detector ornot, your custom program will be ready for you to useagain and again. Simply select it, press ENTER, selectLOAD, and press ENTER again. Follow the on-screen instructions for Air/Ground Balance and thensearch.

7. If you SAVE or NAME a program, then decide youno longer want to keep it, you can replace it with anew program using the same procedure as de-

scribed above. The old program can only be erasedwhen a new program is stored in that position.

8. You can NAME a custom program and at a laterdate replace the program while maintaining thesame name. Develop the changes first to any pro-gram, then use the SAVE method which maintainsthe old name while storing the new program. Tokeep the same program with a new name, firstLOAD that custom program, Air/Ground Balance,then press MENU and go to that custom positionand press ENTER. Now select NAME and pressENTER. You can now develop a new name for theold program.

Other Custom EEPROMProgram InfoGround Balance - When a Custom Program isstored, the Ground Balance setting last used withthat program is also stored. This has advantagesparticularly for those who manually set the GroundBalance for speciality applications. The automaticAir/Ground Balance sequence will always overridemanual settings. To access the last Ground Balancesetting used with a Custom Program, first select thedesired Custom Program then press ENTER. SelectLOAD and press ENTER. Do not Air/GroundBalance as the display suggests, simply squeeze andrelease the TRIGGER. The last Ground Balancesetting will then be in use. If an appropriate Air/Ground setting is not available, the instrument willautomatically require a new Air/Ground Balance.

Return ARROW Key - The last Basic Adjustmentor Pro Option screen used is remembered by yourCustom Program. From the search mode, eitherARROW control will access the last Basic Adjust-ment or Pro Option screen used. This allows easyaccess to the most used adjustment.

Factory Preloaded EEPROM PROGRAMS aredescrived on pages 53 and 54.

4

18


1. Target Volume 48 - 63 How loud a target beeps when detected.

Select TARGET VOLUME with the ARROWcontrols and press ENTER. The current volumelevel sounds continuously. The number designatingthe current level is shown on the right side of thedisplay. To the left, the graphic knob indicates therelationship of the current setting to minimum andmaximum levels.

Use the ARROW controls to select the volume levelyou desire. Volume level will select the loudestpossible sound a shallow target can produce. Highvolume levels will slightly reduce battery life.

Press MENU and use the ARROWS to continueviewing and/or adjusting Basic Adjustments, orSqueeze and release TRIGGER to begin searching.

56TARGET VOLUME

MIN MAX

Tip - Select the loudestcomfortable level, lowerwith headphones, higherwithout. Settings from48 - 63 are available.

23AUDIO THRESHOLD

MIN MAX

2. Audio ThresholdThe slight hum or background tone which is nor-mally heard continuously during searching.

Select THRESHOLD with the ARROW controls,and press ENTER . The current threshold level willsound continuously. The number designating thecurrent level is shown on the right side of thedisplay. To the left the graphic knob indicates therelationship of the current setting to minimum andmaximum levels. Note that the maximum thresholdlevel (42) is well below the minimum VOLUMElevel. Thus with the THRESHOLD at maximum,and the VOLUME at minimum, the detector willstill respond to metal. Use the ARROW control toselect the threshold level you desire. High thresh-old levels will slightly reduce battery life.Press MENU.

Tip - Select the lowestlevel you can still hear.Settings from 0 - 42 areavailable

19


3. Tone (Audio Frequency)Selects the frequency or pitch of the sound thedetector produces.

Select TONE (AUDIO FREQ.) with the ARROWcontrols and press ENTER. The current TONEwill sound continuously. The number designatingthe current level is shown on the right side of thedisplay. To the left, the graphic knob indicates therelationship of the current setting to minimum andmaximum levels. Low frequencies, from about100 down, begin to pulse. Select an audio fre-quency that you can hear comfortably and pro-vides the best definition for your ears. PressMENU.

231TONE(AUDIO FREQ)

MIN MAX

Tip - If you have troublehearing high frequenciesselect low TONE levels(low numbers). If you havetrouble hearing low fre-quencies, select highTONE levels (high num-bers). Settings from 0-255are available.

4. Audio Disc.The ability of the detector to reject trash byproducing different sounds for different types oftargets. Trash is rejected by going silent orproducing a broken "cut-short" sound. Valuablesare detected by a smoother more solid sound.

Select AUDIO DISC. with the ARROW controls,use the ENTER control to turn AUDIO DISC. ONor OFF. When ON, specific targets will be acceptedor rejected based on the Program currently in use.Audio Disc. turns ON or OFF the entire audiodiscriminate feature. When OFF, all types of metalsproduce an audio tone (beep). Only by selection ofa different Program, or by entering the Pro Optionsunder Discrimination, can specific targets (V.D.I.numbers) acceptance or rejection criteria be altered.Press ENTER.

AUDIO DISC. ON OFF


Tip - Use AUDIO DISCON for trash rejection,AUDIO DISC OFF fordetection of all types ofmetals.

20


5. Silent SearchThe ability of the detector to be operated withoutthe threshold or background hum that is normallyheard continuously during operation. Theinstrument is silent until a target is detected.

Select SILENT SEARCH with the ARROWcontrols and use the ENTER control to turnSILENT SEARCH ON or OFF.

To function, SILENT SEARCH requires AUDIODISC ON and MIXED MODE OFF. SILENTSEARCH "ON" will automatically override bothAUDIO DISC and MIXED MODE menuselection to perform the silent search functionregardless of your AUDIO DISC and MIXEDMODE selections. See chart on left side of thispage.

In Pro Options the Discriminate feature can beused to accept all metal targets while usingSILENT SEARCH. It is not possible to achieve anon-motion searching mode with SILENTSEARCH ON. When SILENT SEARCH is ONthe all metal pinpointing mode continues toproduce a threshold. This may not be noticed, asonce the pinpoint mode detunes for better targetcenter locating the threshold is not present.However, releasing, re-squeezing, and holding theTRIGGER with the loop at waist level a thresholdwill be noted. Press ENTER.

SILENT SEARCH ON OFF


Tip - A threshold hum isrecommended as it oftenfades over rejectedtargets providinginformation about targetsand ground conditions. Ifthe constant noisebothers or distracts youand reduced AUDIOTHRESHOLD doesn'thelp, select SILENTSEARCH.

AUDIO DISC

SELECTION

ON

OFF

ON

OFF

ON

OFF

ON

OFF

SILENTSEARCH

SELECTION

OFF

OFF

ON

ON

OFF

OFF

ON

ON

MIXEDMODE

SELECTION

OFF

OFF

OFF

OFF

ON

ON

ON

ON

RESULT

THRESHOLDDISCRIMINATION

ALL-METALNON-DISCRIMINATION

SILENT SEARCHDISCRIMINATION


MIXED MODE

MIXED MODE



21

6. Mixed ModeA unique hybrid operating mode. It is an all-metal(DC non-motion, non-discriminate) mode,working simultaneously with a discriminate (ACmotion discrimination) mode. It is two modes, onedetecting everything and another discriminating,operating at the same time.

Select MIXED MODE with the ARROW controls,press ENTER control to turn MIXED MODE ONor OFF.

AUDIO DISC needs to be ON and SILENTSearch needs to be OFF, for MIXED MODE toperform properly. See chart on (page 20). MIXEDMODE ON will automatically override AUDIODISC selections to perform the MIXED MODEfunction.

When Mixed Mode is on, all types of metals willproduce a sound (beep).

Discrimination Channel - When the loop is inmotion, targets accepted by the discriminateprogram will produce a high-pitched beep. Targetsrejected by the discriminate program will producea lower pitched beep. High-pitched or low-pitchedbeeps are directly determined by thediscrimination settings. An operator can selectdiscriminate settings through the selection of anentire Program or by adjusting the accept andreject V.D.I. numbers in the Pro Options underDiscrimination (EDIT).

All-Metal Channel -When the loop is not inmotion, or moved slowly, all types of targets willproduce the same low-pitch beep. All-metalchannel will by nature detect deeper than thediscrimination channel. Deeper targets willproduce a lower volume sound when the loop ismoved slowly over the area.

MIXED MODE ON OFF


Tip - Advanced operators cangain extra depth by monitoringthe all-metal and discriminatechannels simultaneously,checking depth and diggingtargets too deep for thediscriminate channel alone.For even more informationabout the target, Pro OptionsTONE I.D. and or V.C.O. canbe added to produce a trulyunique advanced users mode.


22


7. A.C. SensitivityUsed to select the appropriate sensitivity (degreethat the instrument is responsive to signals) whilebeing used in the discriminate modes (those whichrequire movement of the loop).

Select A.C. SENSITIVITY with the ARROWcontrols, and press ENTER. Use the ARROWcontrols to set the level of sensitivity shown by thenumber on the right. Press ENTER.

Sensitivity levels adjust detection depth and alsohave a direct effect on detector stability. A.C.SENSITIVITY levels should be selected carefullyto allow stable, predictable performance. Set alower level if the detector behaves erratically.

64A.C. SENSITIVITY

MIN MAX

Tip - Preset levels workwell for most conditions.Reduced levels willimprove stability in difficultconditions. Increasedlevels will improvedetection depth if stabilitycan be maintained.

Tip-Remember that oncethe TRIGGER issqueezed and released togo to a search mode, youcan return to the lastadjustment screen usedby pressing eitherARROW control. Settingsfrom 1 - 85 are availabLE. 8. D.C. Sensitivity

Used to select the sensitivity (degree that the detectoris responsive to signals) while the detector is beingused in non-discriminate (ALL-METAL) modes.These are modes that do not require movement of theloop to respond. D.C. SENSITIVITY fine tunesstability and pinpointing.

Select D.C. SENSITIVITY with the ARROWcontrols, and press ENTER. Use ARROW controls toselect the desired D.C. SENSITIVITY level shown bythe number on the right. Press ENTER. D.C.SENSITIVITY levels should be selected carefully toallow smooth, stable and predictable operation whileallowing for reasonable pinpointing.

A.C. and D.C. Sensitivity Adjustments aretraditionally the way to alter detection depth andstability. There are other methods available in thePRO OPTIONS under PREAMP GAIN.

30D.C. SENSITIVITY

MIN MAX

Tip - Typically, lowerD.C. SENSITIVITYsettings pinpoint shallowtargets far better thanhigh settings. Highsettings will however,produce more pinpointing(as well as non-discriminate mode '(ALL-METAL)' depth).Pinpointing (TRIGGERsqueezed), MIXED-MODE, and V.C.O.AUDIO are dramaticallyimpacted by the D.C.SENSITIVITY setting.Settings from 1 - 60 areavailable.

23

9. BacklightUsed in dark conditions to light the display,improving visibility.

Select BACKLIGHT with the ARROW controlsand press ENTER. Use the ARROW controls toselect the desired BACKLIGHT level. TheBACKLIGHT level will be visible on the display.The current level is shown on the right side of thedisplay. The graphic control knob shows therelationship of the current setting to minimum andmaximum levels. Minimum is 0 (no light). Themaximum backlight setting will reduce battery lifeby as much as 50% depending on the type ofbatteries and how long it is used. LowerBACKLIGHT settings will have significantly lessdrain on battery life.

When the detector is first turned on, it is normalfor the backlight to be on during the openingdisplay and BATTERY CHECK. If theBACKLIGHT is off, it will fade when the MAINMENU display appears. If the BACKLIGHT isON, it will continue until turned off manually or adifferent program is selected. BACKLIGHT canbe saved as part of a custom program, for examplea NIGHT HUNT program.

When Backlight is ON and the TRIGGER issqueezed and released to begin searching,"BACKLIGHT ON" will appear continually onthe display to warn you of the extra battery duty.

EMERGENCY BACKLIGHT - If in the darkyou cannot see the display to turn theBACKLIGHT on, holding the TRIGGER andpressing MENU will bring up the BACKLIGHTadjustment screen. Release the TRIGGER andpress ARROW up to select a level you can see thedisplay. Squeeze and release the TRIGGER tocontinue.

0BACKLIGHT

MIN MAX

Tip - Use only whenneeded, and only as brightas needed, for acceptabledisplay visibility. Backlightuse will decrease batterylife. The brighter the level,the higher the batteryusage. Settings from 0 - 6are available.

CAUTIONIf the instrument is turned ON and theEMERGENCY BACKLIGHT sequence isused, the BACKLIGHT will stay ON onlywhile you stay in that program. PressingMENU and selecting another program willturn BACKLIGHT OFF, if BACKLIGHTis not also ON in that particular program.If in the dark at the time the instrument isturned ON, you may need to squeeze andrelease the TRIGGER and then use theEMERGENCY BACKLIGHT sequence.You can then find the program you desire,press ENTER, press ENTER for AirBalance, and press ENTER for GroundBalance. Use the EMERGENCYBACKLIGHT ON sequence a second timeif the BACKLIGHT fades in that program.Unlike past Spectrum® instruments, theDFX™ BACKLIGHT is no different thanany of the other adjustments. It can besaved in the custom programs or shortterm volatile memory. However, factorypreset programs use the OFF (0) setting asa default (standard setting). Remember,"Hot Keys" do not work from a cold start(batteries just installed), see page 15.


24

10. Viewing AngleAdjusts the display for visibility in low or hightemperature conditions.

Select VIEWING ANGLE with the ARROWcontrols and press ENTER, use the ARROWcontrols to make changes. The current level isshown on the right side of the display. The graphiccontrol knob indicates the relationship of thecurrent setting to minimum and maximum levels.Squeeze and release the TRIGGER to resumesearching.

VIEWING ANGLE has no impact on battery life.

EMERGENCY VIEWING ANGLE PROCE-DURE- If your detector has been in the cold orheat prior to use, you may not be able to see thedisplay to adjust VIEWING ANGLE. Press theON/OFF control, hold the TRIGGER and pressARROW up. You can then use the ARROWcontrols to find a VIEWING ANGLE level thatallows you to read the display. Squeeze andrelease the TRIGGER to begin searching. Like theBACKLIGHT, you will lose your custom VIEW-ING ANGLE setting if you change Programs.You may need to use the EMERGENCY VIEW-ING ANGLE PROCEDURE to see the display.Select the program you desire, use the ENTERcontrol to enter, Air/Ground Balance, then againuse the EMERGENCY VIEWING ANGLEPROCEDURE if the display is unreadable.VIEWING ANGLE is preset at average levels inthe factory preset programs. The display may beunreadable at either of the extreme settings in aparticular environment. Custom VIEWINGANGLE settings will be saved when CustomPrograms are stored for future use.

25VIEWING ANGLE

MIN MAX

Tip - In cold temperaturesthe display typically willbecome slower at respond-ing. Settings toward MAX(higher numbers) speedsthe display and improvesvisibility at cool tempera-tures. In warm tempera-tures or intense directsunlight, the display maybecome difficult to see.Settings toward MIN (lowernumbers) will improvevisibility of the display in allbut extreme situations. Iflarge variations in condi-tions result throughout theday or nights search, youmay have to make severalVIEWING ANGLE adjust-ments to maintain gooddisplay visibility. Settingsfrom 1- 50 are available.


25

Chapter 5 DFX™ Pro Options

Pro OptionsAUDIOAUDIOAUDIOAUDIOAUDIO

1. RATCHET PINPOINTING - Pinpoint feature, automatically detunes for center location.2. S.A.T. SPEED - Self Adjusting Threshold or Auto-tune, automatically maintains threshold.3. TONE I.D. - Assigns each V.D.I. target number its own special tone or sound.4. V.C.O. - Pinpoint or non-discriminate feature, increases pitch or tone with target strength.5. MODULATION - Motion modes produce the same, or different volume, based on target depth.

G.E.B./TRACG.E.B./TRACG.E.B./TRACG.E.B./TRACG.E.B./TRAC6. AUTOTRAC® - Automatically updates Ground Balance during searching.7. TRAC VIEW - TRACK appears on right side of display during AUTOTRAC® adjustments.8. AUTOTRAC® SPEED - Dictates when AUTOTRAC® adjusts Ground Balance.9. AUTOTRAC® OFFSET - Positive or negative AUTOTRAC® (over, or under kill).

10. TRAC INHIBIT - Prevents tracking the ground during target detection.11. COARSE G.E.B. - (Manual Ground Balance) Coarse viewing, or overriding automatic.12. FINE G.E.B. - (Manual Ground Balance) Fine viewing, or overriding automatic.

DISCRIMINATIONDISCRIMINATIONDISCRIMINATIONDISCRIMINATIONDISCRIMINATION13. DISC. EDIT - Change V.D.I. (target reference numbers) accepted (detected), or rejected status.14. BLOCK EDIT - Speeds EDIT by dragging ACCEPT or REJECT with ARROW controls.15. LEARN ACCEPT - Target samples can be used to show or teach ACCEPT discrimination.16. LEARN REJECT - Target samples can be used to show or teach REJECT discrimination.17. RECOVERY SPEED - Speeds target responses, so close together targets each respond.18. BOTTLECAP REJECT - How strongly the instrument rejects or breaks up on iron.19. HOT ROCK REJECT - Degree the instrument is responsive to signals in the +95 (hot rock) category20. SWEEP SPEED - Adjust signal sampling width thus the ideal loop/search coil sweep speed.21. GROUND FILTERING - How much circuitry (high-pass filtering) used to separate ground/trash signals and targets.

DISPLAYDISPLAYDISPLAYDISPLAYDISPLAY22. VISUAL DISC. - Rejected V.D.I. numbers and ICONS do not appear on display.23. ICONS - Graphic display representation of metal targets, ON/OFF.24. V.D.I. SENSITIVITY - Response intensity to produce a display indication & 3rd V.D.I. digit@ 86 and higher.25. D.C. PHASE - Measurement of ground, or metal target, during pinpointing.26. GRAPH AVERAGING - SignaGraph® information collects over multiple loop passes.27. GRAPH ACCUMULATING - Emphasizes common or predominate SignaGraph®.28. FADE RATE - Clears or fades noncurrent SignaGraph® information (bars).

PREAMP GAINPREAMP GAINPREAMP GAINPREAMP GAINPREAMP GAIN29. PREAMP GAIN - Selects the intensity of the signal received from the loop.

MULTI FREQUENCY METHODMULTI FREQUENCY METHODMULTI FREQUENCY METHODMULTI FREQUENCY METHODMULTI FREQUENCY METHOD30. 2 FREQUENCY (BEST DATA) - Transmits and processes at both 3kHz and 15 kHz frequencies (salt eliminated).

Automatically chooses data from the most reliable frequency (based on both magnitude and phase) for each specific target.31. 2 FREQUENCY (CORRELATE) - Transmits and processes at both 3kHz and 15 kHz frequencies (salt eliminated).

Compares data at 3 kHz and 15 kHz. Target signals that do not provide reasonably predictable information at both are automati-cally rejected. Iron typically doesn't compare predictably between frequencies, improved iron rejection can be expected.

32. V.D.I. (NORMALIZED) - 2 Frequency modes (Best Data and Correlate) automatically have V.D.I Normalized ON asit is required for these modes to operate predictably. Differences at 3 kHz and 15 kHz skew the well known traditional (6.59kHz) V.D.I. chart/numbers painted on the top of the DFX control box. Normalization recalculates signals for this traditionalV.D.I. number chart. OFF expands/compresses portions of this V.D.I. scale (depending on the 1 frequency used.).

33. 1 FREQUENCY (3kHz) - Operates at 3 KHz providing for superior high iron mineral use (no salt present) particularlyfor high conducting silver/copper alloys. Normalized ON maintains traditional (6.59 kHz V.D.I. chart/numbers. NormalizedOFF significantly expands higher end of V.D.I. chart/numbers compressing lower end of the scale.

34. 1 FREQUENCY (15 kHz) - Operates at 15 kHz providing in lower mineralized areas (no salt present) particularly forlower conducting gold/nickel alloys. Normalize OFF significantly expands lower end of V.D.I. chart/numbers compressinghigher end of the scale.

(Overview)

26

Basics of Pro OptionsThe PRO OPTIONS are used to make the moreintricate adjustments available on this model. ThePRO OPTIONS are divided into five major catego-ries of menus, structured similar to the BasicAdjustments. Methods of entry, adjustment, exit,and reentry remain the same.

To enter the PRO OPTIONS from a search mode,press MENU and the MAIN MENU will appear.Use the ARROW controls to select PRO OPTIONSand press ENTER. The PRO OPTIONS menu willappear on the display. There are two pages to thePRO OPTIONS menu (PG. 1/2 Page one of two).

The ARROW controls are then used to select thedesired PRO OPTION category.

The six major categories have options specific totheir titles. For example, all the options underAUDIO have to do with the way the audio circuitsof the instrument behave. Once a category has beenselected and the ENTER control pressed, theARROW controls can then be used to scrollthrough all the options even beyond that categoryi.e., beyond PRO OPTIONS, back to PRESETPROGRAMS, and BASIC ADJUSTMENTS. Thecategories will only reappear if MENU is againpressed, or at specific times during scrolling (tooffer short cuts).

From this point forward, we will assume that youknow how to use the MENU control, the ArrowControls to make a selection, the ENTER control toenter or select that option, the Arrow Controls tomake adjustments, and the MENU to exit. Remem-ber, squeezing and releasing the trigger returns to asearch mode. Arrow Controls can be used to returnfrom the search mode to the last menu or adjust-ment display used.


Pro Options


PRO OPTIONS PG. 1/2AUDIOG.E.B./ TRACDISCRIMINATION

PRO OPTIONS PG. 2/2DISPLAYPREAMP GAINMULTIFREQ. METHOD

Be aware that changes you make to aProgram are only in effect as long as youcontinue using that Program. If thedetector is turned OFF, the Trigger mustbe squeezed and released to recover shortterm (volatile) memory upon turning thedetector ON. If you want to keep thechanges you made to a specific programover an extended time period (days orweeks), or through battery changes, theentire Program must be saved in a CustomEEPROM Program position.

CAUTION

MAIN MENU Screen

Pro OptionsSub Menu #1

Pro OptionsSub Menu #2

27


1. Ratchet PinpointingPinpointing feature, automatically detunes for easytarget-center locating.

ON - Automatically aids in pinpointing. When theTRIGGER is squeezed and held for pinpointing,RATCHET PINPOINTING will shrink the size ofthe signal as the loop is passed over the target areaseveral times. The signal will not fade completelyunless the loop is moved too far away from thetarget center.

OFF - When OFF, the signal will remain originalsize giving some indication of its size and shape.Manual shrinking is completed by squeezing andreleasing the TRIGGER several times as the loop ispassed over the target. Manual shrinking cancompletely eliminate the target. If the target nolonger responds after manual shrinking, move theloop away from the target, squeeze and release theTRIGGER, and again sweep the loop over the area.If the target is a metal, it should again respond.

RATCHET PINPOINTING ON OFF


Tips - Use the ONsetting until experiencedat pinpointing.

(Audio section)

28


2. S.A.T. SpeedSelf-Adjusting Threshold (auto-tune) smooths theTHRESHOLD, OFF (0), or ON (1-10).

Without S.A.T. SPEED (a setting of 0), changes inthe ground (and the passage of time) will tend toproduce changes in the THRESHOLD sound. TheTRIGGER will have to be squeezed and releasedrepeatedly to maintain the THRESHOLD. This isparticularly noticeable in non-discriminate modes,although S.A.T. SPEED will also tend to addstability to discriminate modes. S.A.T. SPEEDs 1through 10 will automatically correct for suchTHRESHOLD changes.

S.A.T. (auto-tune) is a feature that has been usedon metal detectors dating back to the 1970's. Itadds a loop-motion requirement to modes whichare ordinarily non-motion. It is also known toproduce some variations in the responses to hotrocks (rocks more mineralized than the surround-ing ground) which change with different speedselections.

Only enough S.A.T. SPEED required to maintainstability is recommended. Typically normal coinsearching requires slower (lower number) speeds,beach hunting and relic hunting require slightlyfaster speeds (higher numbers), and prospectingrequires the fastest settings (highest numbers).

5S.A.T. SPEED

MIN MAX

Tips - Recommended formost conditions as itprovides greater stabilityparticularly in non-discrimi-nate modes or whensensitivity levels aremaximized. Typically,faster S.A.T. SPEEDs(higher numbers) improveperformance in moremineralized ground.Slower S.A.T. SPEEDs(lower numbers) improveperformance in milderground conditions. Settingsfrom 0 - 10 are available.

(Audio section)

29


3. Tone I.D.Assigns each V.D.I. number its own distinct toneor pitch. Target ranges can easily be identified bytheir sound. The higher the V.D.I. number, thehigher the pitch of their sound. Reject targets stillbreak up or "cutout".

Tone I.D. is used in the discriminate or motionmodes. When ON, each V.D.I. target number hasits own audio frequency or pitch (191 differentpitches). The higher the V.D.I. number, the higherthe pitch. Where a target indicates on the V.D.I.scale can be immediately recognized. The soundthat rejected targets produce will still be canceledor modified (broken up) by the discriminate circuit.

The 191 different pitches or tones activated withTONE I.D. cannot be adjusted as to their pitch.Each V.D.I. number's sound is predetermined bythe factory and is not adjustable, nor will they shiftwith TONE (AUDIO FREQUENCY) adjustments.

TONE I.D. ON OFF


Tips - Great for coin,jewelry, and relic search-ing. Can be used incombination with MIXEDMODE.

4. V.C.O.Voltage Controlled Oscillator produces a higherpitched tone the stronger the target becomes.

Voltage Controlled Oscillator is a feature that willonly work in the non-discriminate modes. When itis ON, the stronger the response the higher thepitch of the sound. An excellent aid in pinpointing,V.C.O. will only function when the trigger issqueezed for pinpointing when activated in a dis-criminate mode. It will function full time in thenon-discriminate (ALL-METAL) modes.

D.C. SENSITIVITY settings will dramaticallychange the performance of V.C.O. D.C. SENSI-TIVITY settings above a level of 35 may peak theaudio pitch too soon to allow V.C.O. to be useful.D.C. SENSITIVITY settings of 35 or below (lowernumbers) are recommended, particularly in trashyareas where targets are close to each other.

V.C.O. ON OFF


Tips - The best aidavailable for pinpointing.Also can work well incombination with MIXEDMODE to more easilyindicate when the non-discriminate channel isoperating.

(Audio section)

(Audio section)

30


5. Modulation Allows motion modes to produce different volumelevels based on target depth.

Modulation is used in the discriminate or motionmodes. When ON, it allows the depth of the targetto dictate the volume of the response. Thus deeptargets can be easily recognized by their lower-volume sound. If OFF, the discriminate or motionmodes will produce the same volume of responseon all detected targets regardless of depth. The useof MODULATION allows for the singling out ofdeep targets in the standard discriminate mode. Itmay save time by eliminating the checking of eachtarget with the depth indication in the pinpointmode.

MODULATION ON OFF


Tips - If you have excellenthearing and want to singleout deep targets by theirlower-volume responses,use modulation. ON is thedefault (standard setting)for all factory PresetPrograms. If your hearingisn't the best, the OFFsetting is recommended.

(Audio section)

31

6. AutoTrac®

AUTOTRAC® allows the instrument to automati-cally readjust the Ground Balance setting duringsearching. This readjustment allows for naturaloccurring changes in the ground mineral of an area.By maintaining an accurate Ground Balance,detection depth and stability are enhanced. AUTOTRAC® is recommended for typical search condi-tions. If, however, a great deal of decomposedman-made iron is encountered, AUTOTRAC® OFF,or a reduced AUTOTRAC® SPEED is advised.AUTOTRAC® operation is affected by TRACINHIBIT.

AUTO TRAC ON OFF


Tips - Use ON for mostsearch conditions.

(G.E.B./Trac section)

7. Trac ViewWhen ON, "TRACK" appears on right side ofdisplay when AUTOTRAC® makes adjustments tothe Ground Balance setting.

TRAC VIEW offers a way to observeAutotracking. When ON, "TRACK" will appearmomentarily on the right-hand side of the displayjust above the SignaGraph® while AUTOTRAC® isadjusting. This information is valuable whenattempting to determine an appropriate Trac Speed.It may also be a valuable aid in determining therelative ground conditions. Reoccurring "TRACK"would indicate difficult ground. In average groundit is desirable to see some tracking occur (seeTRAC SPEED).

TRAC VIEW ON OFF


Tips - Use when experi-menting with differentTRAC SPEEDs to deter-mine if, and how often,AUTOTRAC® automaticallyadjusts Ground Balance.


-95 +95

TRACK


32


8. Trac SpeedDictates when AUTOTRAC® adjusts GroundBalance.

Trac Speed allows adjustment of the amount ofground mineral change required to causeAutotracking to occur. At slower speeds (lowernumbers) it takes a significant change in theground to cause tracking to occur. At faster speeds(higher numbers) it takes very little change in theground mineral to cause tracking to occur. The endresult, more tracking occurs at higher numbers thanat lower numbers. Too much tracking can causeerrors in the ground balance setting. Not enoughtracking can result in the ground balance settingnever catching up with changing ground. TRACVIEW is used to see how much tracking is occur-ring. Generally, a faster (higher number) TRACSPEED is needed for more consistent groundconditions. Slower TRAC SPEEDS (lower num-bers) is needed for more inconsistent groundconditions. "TRACK" appearing every three to fivesweeps of the loop is the ideal setting when theground conditions will allow.

8AUTO TRAC SPEED

MIN MAX

Tips - It is desirable toselect a TRAC SPEED thattracks the ground onceevery three to five sweepsof the loop however, thismay not be possible inextremely consistent, orextremely inconsistentground conditions, whichmay TRAC less or morethan this desired standard.Settings from 1 - 20 areavailable.


33

9. Trac OffsetAllows AUTOTRAC® to track ground mineralseither positive or negative in relationship to thecorrect setting (under, or over kill).

TRAC OFFSET allows the AUTOTRAC® featureto track the ground slightly more or less than whatwould normally be considered perfect, mostly forexperts that prefer a slight offset.

A slightly positive offset can be used to enhancethe responses of small metals (gold nuggets) inhighly-mineralized ground. Positive is indicated bya slight increase in threshold as the loop ap-proaches the ground in the all-metal mode. Dis-crimination and depth may also be improved.

A negative offset may be used to eliminate particu-larly troublesome "hot rocks" in areas that areotherwise difficult to search. Negative offset isindicated by a loss or slight decrease in the thresh-old as the loop approaches the ground in the all-metal mode.

+ 0AUTO TRAC OFFSET

MIN MAX

Tips - Recommended onlyfor experienced operatorswho fully understandground rejection. Settingsfrom -10 - +10 areavailable.


10. Trac InhibitPrevents AUTOTRAC® from tracking the groundduring target detection.

TRAC INHIBIT ON prevents the AUTOTRAC®

feature from altering Ground Balance during thedetection of targets. This prevents the possibilityof tracking to the corrosion associated with mostmetals. TRAC INHIBIT ON is recommended formost searching conditions. Some metals do notcorrode (GOLD) and since tracking is extremelyimportant in high mineral conditions, the ability toturn TRAC INHIBIT OFF is available. OFF isautomatically selected in the Prospecting Programand is recommended for prospecting.

TRAC INHIBIT ON OFF


Tips - ON for most searchconditions, OFF for pros-pecting.



34

11. Coarse G.E.B.(Manual Ground Balance) allows viewing thecurrent automatic Ground Balance setting (Air/Ground Balance) and/or manual overriding of theautomatic Ground Balance.

COARSE & FINE G.E.B. (Ground ExclusionBalance, or ground rejection) allows manualoverride of the automatic balancing features toselect a specific Ground Balance setting.COARSE allows major adjustments. FINE allowsminor adjustments near the COARSE setting.

Before attempting manual Ground Balance adjust-ments, turn off AUTOTRAC® since it will alter anymanual changes you make. Manual Ground Balancewill begin at the setting selected by the automatic(Air/Ground Balance) sequence. An Automatic Air/Ground Balance performed after manual adjustmentwill cancel the manual setting. To maintain a manualsetting, the Automatic Air/Ground sequence must beavoided by squeezing and releasing the TRIGGERwhen, and if, the Air Balance instruction appears. AirBalance instructions may appear during Basic Adjust-ment or Pro Options selections following the manualadjustment.

When manually adjusting the Ground Balance, it isnecessary to make an adjustment in COARSE and/or FINE, then squeeze and release the TRIGGER.The TRIGGER can be held in, and the loop low-ered and lifted over the ground to check for achange in sound which would indicate imperfectGround Balance. To return to the Ground Balancedisplay for further adjustment, press either of theARROW controls. When perfectly Ground Bal-anced in a search mode, the TRIGGER can besqueezed and held, and the loop lowered and liftedwith very little change in the threshold hum.

50COARSE G.E.B.

MIN MAX

Tips - Use for controlledreactions to specificminerals or hot rocks.Settings from 0 - 255 areavailable.



35


12. Fine G.E.B.FINE G.E.B. is used to make smaller adjustmentsto the Ground Balance range on either side of theCOARSE setting. The FINE setting combines withthe COARSE setting to determine the actualground rejection level. To determine exactly whatlevel the automatic Air/Ground sequence selected,it is necessary to check both COARSE and FINElevels.

Manual Ground Balance will rarely be used forperfect balancing as the automatic balance isextremely reliable. It is generally used to offsetGround Balance for the same reasons AUTOTRAC® OFFSET is used.

In COARSE or FINE, lower numbers indicate aGround Balance setting toward the negative side ofthe V.D.I. scale (iron). Larger numbers indicate aGround Balance setting toward the positive side ofthe V.D.I. chart (salt). Bad ground conditions(high mineralization) may be described as eithermagnetic (negative or low numbers) or conductive(positive or high numbers). COARSE and FINEsettings of 0 represent a ground rejection similar toa V.D.I. number of -95. COARSE and FINEsettings of 255 represent a ground rejection levelsimilar to a V.D.I. number of +10. This V.D.I.range from -95 to +10 represents the ground rejec-tion range of this instrument. If ground balance(either automatic or manual) occurs near the 255COARSE setting, significant loss in sensitivity canbe expected to targets which indicate in the V.D.I.number range of 1 to 10. However, manual groundbalance doesn't exactly work like a discriminator,where V.D.I. numbers are simply REJECTED.The actual phase of Ground Balance is out ofsequence with most targets; thus some responseswill occur even if COARSE & FINE G.E.B. arematched exactly to a particular targets V.D.I.number.

128FINE G.E.B.

MIN MAX


Tips - Use for controlledreactions to specificminerals or hot rocks. TheFine G.E.B. control whenadjusted to the top of thescale, 255, will automati-cally bump up the CoarseG.E.B. setting by oneincrement so that fineadjustment can continueuninterrupted. Whenadjusted to the bottom ofthe scale, 0, Coarse G.E.B.setting is automaticallybumped down by oneincrement so that fineadjustment can continueuninterrupted. The entireCoarse G.E.B. range isavailable on the FineG.E.B. control madepossible by this mecha-nism. Settings from 0-255are available, coarse andfine.

36


13. Disc. EditAllows for changing which targets V.D.I. or refer-ence numbers are ACCEPTed (detected), orREJECTed, (discriminated out) within the currentProgram you are using.

Select DISC. EDIT and press ENTER. Now usethe ARROW controls to view the V.D.I. numbersfrom negative -95 to positive +95 that appear onthe right side of the display. These are the samereference numbers that are listed on the top right-hand side of the control box (V.D.I. SCALE ortarget chart). For each V.D.I. number, a √ willappear to the left indicating whether the currentprogram will ACCEPT or REJECT targets thatdisplay that number.

Use the ENTER control to change any desiredV.D.I. number to ACCEPT or REJECT status.

If you do not save the entire Program into a Cus-tom Program, the changes you make in EDIT areonly in use as long as you continue to use thatprogram. The only exception being the temporaryshort-term or volatile memory as previously de-scribed. If you make EDIT changes in Coin, andthen switch to COIN & JEWELRY, you lose allediting you completed in the Coin Program. Eachtime a factory Preset Program is ENTERed, allunsaved settings are overwritten by the factoryrecommended settings. Only the Custom Programswill save your custom settings through PresetProgram selections.

Accepting a wider range of V.D.I. numbers willhave an impact on detection depth, particularly forvery deep targets that are difficult for the display toidentify. Positive +95 is one of the most significantV.D.I. numbers. Some Preset Programs are set sothat the positive +95 V.D.I. number is rejected. Thedisplay uses positive +95 for many different types

DISC. EDIT ACCEPT REJECT


+72

DISCRIMINATION - Will have a greaterimpact on how the instrument operatesthan any other feature. Audio DiscriminateON/OFF is located in the BASICADJUSTMENTS, (page 19).

DISC. EDIT and BLOCK EDIT areexceptions to the keystroke rule in thatthey do not have a graphic control knob.However, ENTER must still be pressedbefore adjustments are possible.

(Discrimination section)

Tips - The factory PresetPrograms have all themajor DISCRIMINATIONEDIT setups alreadydefined and ready for youto use. Major changes inACCEPT and REJECTtargets should be selectedby choosing one of thesefactory programs. EDITallows customizing forspecific or unusual targetsyou may want to eitherACCEPT or REJECT.Settings from -95 - +95.

37

of targets it cannot readily identify. Therefore, ifpositive +95 is ACCEPTed, questionable targetsmay be dug that indicate this number and canproduce some interesting recoveries. A good tipregarding positive +95: If a target indicates 95,and the depth display indicates it as being fairlydeep; dig it. If the depth display indicates it asbeing fairly shallow, it is more likely to be trash ora hot rock. HOT ROCK REJECT in the Pro Optionshas 20 levels available for the acceptance or rejec-tion of +95. An operator can adjust HOT ROCKREJECTION to suit personal preference and areademands. (See page 42.)

The first 30 to 40 negative numbers below zero alsoimpact detection depth. Most iron indicates furtherinto the negative numbers. Thus the first 30 to 40negative numbers can often be ACCEPTed withoutdigging much iron. ACCEPTing from the positivenumbers down as low as minus 30 to 40 has thelargest impact on the lower end of the positivenumbers. Sensitivity to small jewelry is increased.However, sensitivity to foil is also increased. On abeach or in a park that has lots of small foil,ACCEPTing down to minus 30 to 40 may not bepractical. While ACCEPTing these minus numbers,a reduced sensitivity setting may help eliminatesome of these small bits of unwanted foil.

ACCEPTing all V.D.I. numbers will produce thebest overall detection depth however, with theamount of trash in most areas, searching with norejection is seldom practical. TONE I.D. is a morepractical choice. The idea of discrimination is toACCEPT V.D.I. numbers most likely to be valu-ables and to REJECT the V.D.I. numbers mostlikely to be trash. Digging ease, and acceptability inan area will also decide the amount of ACCEPTedV.D.I. numbers desired. No metal detector canreject all trash while accepting all valuables. The

deeper you want to detect, the more trash you willneed to accept and dig.

The detector sees metals electronically; thus somevaluable and non-valuable targets may look identi-cal to the detector. To select ACCEPT and RE-JECT V.D.I. numbers is to gamble that the areasyou select for ACCEPT will be good targets, andthe area you select for REJECT will be trashtargets. A factory program which uses the law ofaverages usually produces more good targets thantrash. The EDIT feature allows you to fine-tune theACCEPT and REJECT settings for your area andtypes of desired targets, further improving theseodds.


38


14. BLOCK EditSpeeds major EDIT changes by dragging ACCEPTor REJECT with ARROW controls.

Allows major EDIT changes to be completedquickly. EDIT is for individual V.D.I. numberchanges and/or viewing of the current settings.BLOCK EDIT is for changing multiple V.D.I.numbers, or ranges.

Select BLOCK EDIT with the ARROW controlsand press ENTER. The ENTER control can beused to select either ACCEPT or REJECT. TheARROW controls can then be used to drag thatACCEPT or REJECT status as far as desiredthrough the V.D.I. number range. When a V.D.I.number or range of numbers appear that you wantset differently, stop dragging with the ARROWs,press ENTER to change the ACCEPT/REJECTstatus, and then drag that new status as far as youdesire. ENTER changes ACCEPT/REJECT;ARROWS drag that ACCEPT/REJECT status;ENTER again changes ACCEPT/REJECT; AR-ROWS drag that new ACCEPT/REJECT status,etc.

BLOCK EDIT not only saves time if large sectionsof the V.D.I. target numbers are to be changed, italso allows peace of mind in the certainty of howall the V.D.I. numbers are set. In the same amountof time it takes to view all the V.D.I. number'scurrent status in regular EDIT, you can set themthe way you desire in BLOCK EDIT.

BLOCK EDIT ACCEPT REJECT


+72


Tips - If more than a fewV.D.I. numbers are to bechanged, use BLOCKEDIT. Settings from -95 -+95.Caution: You cannot viewthe current settings or therecent changes you havemade while still in BLOCKEDIT. You must pressMENU, ARROW up toEDIT and ENTER. Thearrows can then be used toview the settings. When-ever the arrows are usedwhile in BLOCK EDIT, youwill change every V.D.I.number viewed to theACCEPT or REJECT statuswhichever one appears onthe display.

39


15-16. Learn Accept/RejectSpecific target samples can be used to show orteach the discriminator what metal targets youdesire to ACCEPT or REJECT.

Select LEARN ACCEPT or LEARN REJECT withthe ARROW controls and press ENTER to turnLEARN ON. The current selection is indicated bythe √ mark in square on the left of the display.

Once ON:1. Squeeze and release the TRIGGER.

2. Show metal target sample or samples tothe instrument by sweeping them one at atime in front of the loop until the desiredaccept or reject sound is heard.

3. Press either ARROW control to return tothe LEARN selection display.

4. Press ENTER control to select LEARNOFF.

5. Squeeze and release the TRIGGER toreturn to a searching mode.

LEARN ACCEPT ON OFF



Tips - If searching for one specifictarget and an exact sample is available,BLOCK EDIT everything for reject thenuse LEARN ACCEPT to accept onlythat specific target. If using a standardprogram and a specific unwanted trashtarget is being detected, use theLEARN REJECT to change the pro-gram to reject it.

If you do not return to the LEARNselection screen and turn LEARN OFF,the detector will continue to learn (AC-CEPT or REJECT) every metal target itencounters. Selecting LEARN OFF afteryou have learned a target is extremelyimportant.

Iron alloys, such as steel bottle caps ornails, should never be used for thisLEARN method of programming. Be-cause of their inconsistent V.D.I. indica-tions, iron alloys tend to scatter or other-wise confuse the discriminate program.If this occurs, it is best to turn the detec-tor OFF, back ON, and re-ENTER thedesired Program to return to the originalfactory preset discriminate settings.

CAUTION

As with EDIT, LEARN changes will only betemporary until saved in a Custom Program.

If LEARN has been used to develop a discriminateprogram, the ACCEPT or REJECT V.D.I. numberscan be reviewed by using the EDIT feature.

LEARN REJECT ON OFF


40


17. Recovery SpeedSpeeds target responses, so several targets that areclose together can each respond.

When a metal is detected, it takes a fraction of asecond for the detector to process the signal beforeit can respond to another metal target nearby. Thetime it takes to process the first metal target signalso that the second metal target signal can respondis called RECOVERY SPEED.

There are advantages and disadvantages to fast(high numbers) and slow (low numbers) RECOV-ERY SPEEDS. Faster RECOVERY SPEEDs workwell in high trash areas. However, they will havesome difficulties with very deep targets as well asdouble responses on shallow targets. SlowerRECOVERY SPEEDs do not work very well inhigh trash areas. However, they will have betterresponses on very deep targets. Slower speeds alsohave more definitive discrimination sounds. Acustom setting needs to be found that suits thepreferences of the individual and the conditions inthe area. As a general rule, the closer together themetal targets are in an area, the faster the recoveryspeed should be. The more spacing between tar-gets, the slower the speed should be. Don't use thefast speed if you don't need to.

Sweep speed (page 43) and more significantly,Ground Filtering adjustments (page 44) will alsodramatically improve or degrade performance inhigh trash.

30RECOVERY SPEED

MIN MAX


Tips - Use faster speeds(higher numbers) for trashyareas, slower speeds(lower numbers) for lowtrash areas and/or im-proved discrimination.Settings from 1 - 40 areavailable.

41


18. Bottlecap RejectAdjusts how strongly the instrument rejects orbreaks up on iron.

Most starting programs use the minimum setting.As larger numbers are selected, more bias rejectionagainst iron occurs.

The advantage of higher BOTTLECAP REJECTsettings is that in high-trash areas more decisiveiron rejection occurs. Trash becomes easier toidentify by the broken sounds they produce.

The disadvantage of a high Bottlecap Rejectionsetting is if an iron target is close to a good metal,the high degree of bias against iron may cause thedetector to cancel both responses. Another disad-vantage is that all targets, iron and non-iron, tend tostart sounding more broken at high levels ofBOTTLECAP REJECT. The operator needs tofine tune BOTTLECAP REJECT according to theirpreferences and the conditions being searched.

Some ground conditions make it difficult for theinstrument to recognize iron. BOTTLECAP RE-JECT allows compensation for these areas.

4BOTTLECAP REJECT

MIN MAX


Tips - If having difficultiesrecognizing the brokensounds of iron, try increas-ing BOTTLECAP REJECT.Settings from 1 - 20 areavailable.

42


19. Hot Rock Reject

5HOT ROCK REJ.

MIN MAX


Tips - Hot Rocks are oftendescribed or categorized aseither negative/magnetic(cold rock) or positive/conductive (hot rock).Typically a negative ormagnetic “cold rock” willrespond in the searchmode, however, once thetrigger is squeezed forpinpointing it ceases torespond. A positive orconductive “hot rock” willcontinue to respond duringpinpointing.

If hot rocks are a problemin the area being searched,in most cases a HOTROCK REJECT setting canbe found that will minimizetheir target like responsescompared to real metaltarget responses in the +95category. Settings from1 - 20 are available.

Hot rocks (rocks higher or different in mineraliza-tion than the surrounding ground) respond as +95on the V.D.I. scale. Unfortunately in some groundconditions very deep, small, or unusual real metaltargets may also indicate +95. In the past an opera-tor would either accept +95 with the DISC EDITfeature and hear hot rocks as a target response“beep”, or reject +95 and not hear a target likeresponse from + 95 target types.

The HOT ROCK REJECT features allows a com-promise between total rejection or total acceptanceof the + 95 V.D.I. indication. Disc Edit Accept orReject of +95 will only control the visual displayingof +95 with the Visual Discrimination feature ON.To reject or accept +95 with the audio discrimina-tion, Audio DISC must be on, and the HOT ROCKREJECT feature adjusted for your preference-regarding +95.

A HOT ROCK REJECT range of 0 to 20 is pro-vided. At 0 the same characteristics can be expectedas EDIT ACCEPT +95 has provided with pastWhite’s models. At 20 the same characteristics canbe expected as EDIT REJECT +95 provided withpast White’s models.

At 10 a compromise between accepting +95 andrejecting +95 is achieved. A hot rock may or maynot produce a target like response depending uponmany factors such as the actual size of the hot rock,degree of difference between the hot rock’s mineral-ization and the surrounding ground, the currentground balance setting, and the Sensitivity/Gainsettings.

Hot Rock Reject provides for 19 shades of graybetween totally accepting all hot rocks (0), andtotally rejecting all hot rocks (20).

43


20. Sweep Speed

15SWEEP SPEED

MIN MAX


Tips - Typically a competi-tion or speed hunt wouldindisputably be a situationwhen an operator woulddesire the best perfor-mance with a faster loopsweep speed. Another areawell suited to faster loopsweep speeds are largeareas that have few metalitems near each other.

Typically high trash areas,or older areas that deservea slower more methodicalsearch, are ideal for slowerloop sweep speeds.Settings from 1 - 20 areavailable.

The quickness the loop or search coil is passed fromside to side is critical for modern metal detectors toperform properly regarding detection depth anddiscrimination. Sweep Speed is often a personalpreference feature. Individuals may like or dislike aparticular model based on it’s required ideal sweepspeed. Additionally an individual may prefer aquicker sweep speed for a particular area or type ofsearching and a slower sweep speed for anotherarea or type of searching. Most metal detector’ssweep speed is designed into the electrical circuitand not adjustable.

The SWEEP SPEED of the DFX is adjustable in allsettings except a GROUND FILTER setting of 2. AGROUND FILTER setting of 2 has a fixed (notadjustable) sweep speed.

An adjustment range from 1 to 20 is available. 1 isthe slowest ideal (best performing) loop or searchcoil sweep speed, 20 is the quickest ideal (bestperformance) sweep speed.

SWEEP SPEED regulates the ideal (best perfor-mance) loop sweep speed by controlling the widthof the target signal the detectors electronic circuitsamples or analyzes. By expanding the samplewindow (lower number settings) a slower loopsweep speed becomes ideal. By narrowing thesample window (higher number settings) a quickerloop sweep speed becomes ideal.

RECOVERY SPEED is highly interactive withSWEEP SPEED and GROUND FILTERING.Generally faster RECOVERY SPEEDS are bettersuited to faster SWEEP SPEEDS. Generally SlowerRECOVERY SPEEDS are better suited to slowerSWEEP SPEEDS. GROUND FILTERING addsnew dimensions to these features. SWEEP SPEED,RECOVERY SPEED, and GROUND FILTERINGall have a dramatic effect on the way the discrimi-nation responds to both trash and valued metalalloys.

44



21. Ground Filtering(High Pass Filters orDifferentiators)4

GROUND FILTERING

MIN MAX


Tips - Metal detectors areoften described or catego-rized by the amount ofelectronic filtering used todistinguish between theground, trash, and valuedmetal alloys. Typically thefewer the filters, the quickerthe metal detector canrespond between severalmetals targets close toeach other. However,detection depth in mineral-ized ground quickly dimin-ishes with fewer filters.Audio discriminationsounds are not as pro-nounced with reducedfiltering. The more theelectronic filters the betterthe detection depth inmineralized ground andaudio discriminationbecomes more pro-nounced. However, morefilters equals slowerresponses and severaltargets near each otherbecome difficult to sort outor respond separately.Settings from 2 - 6 areavailable.

GROUND FILTERING is adjustable with theDFX. The first two primary filters are containedwithin the hardware (electrical parts). The remain-ing filters are contained within the computer soft-ware allowing full user adjustment.

The DFX GROUND FILTERING has an adjust-ment range from 2 through 6. At a setting of 2SWEEP SPEED is not adjustable (fixed).

Selection of 2 filters allows for the best perfor-mance in high trash areas of medium to low groundmineralization. Combined with the RECOVERYSPEED, and BOTTLECAP REJECTION the DFXwill pull some good targets from previously heavyhunted high trash areas.

Selection of 3 filters will allow for better depthperformance than 2 in slightly higher ground miner-alization.

Selection of 4 filters allows for the traditional highend White’s filtering ideal for medium to highmineralized ground.

Selection of 5 or 6 filters allows for new levels offiltering for extreme ground conditions. Althoughsome models have been described as having 6filters in the past, two of those six were dedicated tovisual indications alone. The DFX 6 filter selectiondedicates all six to ground rejection, discrimination,and audio detection. For those who search extrememineralized ground conditions the DFX with itsmultifrequency salt/conductive mineral cancelationand new levels of ground filtration will provide forperformance levels never before available.

45


22. Visual Disc.When ON, REJECTed V.D.I. numbers and theirassociated ICONS are prevented from appearing onthe display. When OFF, all V.D.I. numbers andassociated ICONS appear.

VISUAL DISC. "ON" eliminates both the V.D.I.number and the ICON (NAIL, FOIL, PULL TAB,etc.) of REJECTed V.D.I. numbers from appear-ing on the display. In other words if Visual Dis-crimination is ON, and a specific target is rejected(for example 0-IRON) then 0-IRON will notappear on the display. If VISUAL DISC. is OFF,all the display indications will appear regardless ofwhether the specific V.D.I. number is ACCEPTedor REJECTed.

Visual Discrimination is based on the currentdiscriminate program.

Visual Discrimination has the advantage of elimi-nating a large number of REJECTed V.D.I.numbers from appearing on the display. Thedisadvantage is that much of the visual displayinformation will not appear for you to interpretquestionable target responses.

VISUAL DISC.ON OFF


(Display section)

Tips - Typically you're notinterested in the RE-JECTed target information.Eliminating it from appear-ing reduces or cleans upthe display information youmust interpret. ON isrecommended for mostsearch conditions.

-95 +95

23. IconsGraphic representation of metal targets, "NAIL,FOIL, PULL TAB, SCREW CAP, COINS".

ICONS are designed for average use inside theUSA. If searching in other countries, or in areaswhere such common types of targets are not ex-pected, ICONS may be distracting. In such cases,this option allows the ICONS to be turned off.

ICONSON OFF


(Display section)

Tips - The ICONS provide aquick way of reading thedisplay information. ON isrecommended. If you do notuse these ICONS, selectingOFF will speed the remain-ing display indications.

46


24. V.D.I. SensitivityControls how strong a target must respond toproduce a display indication, and controls a thirddigit (fraction) of the V.D.I. number.

V.D.I. Sensitivity controls the intensity (strength)of the target signal needed to activate the displayindications. A low V.D.I. Sensitivity setting wouldrequire a strong target signal to trigger the displayindications. A higher V.D.I. Sensitivity settingwould require very little target signal to trigger thedisplay indications.

To provide greater specific target resolution, levelsof 86 and above will provide a third V.D.I. digit(.0) to better evaluate targets. During EDIT onlythe first two digits can be programmed ACCEPT orREJECT.

As with all sensitivity levels, if set too high for thearea, the detector will become unstable and thedisplay indications unreliable.

Low ground mineralization is typically a goodindication that high V.D.I. sensitivity settings areappropriate. Heavy mineralization or electricalinterference are conditions where a lower V.D.I.Sensitivity setting is appropriate.

This feature is designed to allow adjustment of thedisplay stability. However, because theinstrument's display and audio tone are closelyassociated in many of the audio modes, the V.D.I.Sensitivity may increase or decrease overall audiosensitivity.

80V.D.I. SENSITIVITY

MIN MAX

(Display section)

Tips - Lower V.D.I. SENSI-TIVITY level (smallernumbers) offer fewer andmore reliable displayindications. However,some deep targets may ormay not respond with adisplay indication. HigherV.D.I. SENSITIVITY levels(higher numbers) producemore display indications,but less reliability. Levelsof 86 and above produce athird V.D.I. digit (.0),providing greater resolu-tion. Settings from 0 - 99are available.

+19.8 5¢

-95 +95

Third number (.8)

47


25. D.C. PhaseMeasurement of the ground mineralization, ormeasuring the phase (V.D.I. reference number) of aspecific metal target during pinpointing.

When D.C. PHASE is ON, and the TRIGGERsqueezed and released, normal searching begins.When a target is located, or when the operatorwants to measure a target or the ground, the TRIG-GER is squeezed and held as if to pinpoint. Whenthe loop is held stationary over the target or ground,the D.C. PHASE is shown on the upper-right sideof the display. The depth reading can be used tohelp center the loop over a target for more accurateindications. The audio tone will also assist incentering the loop over the target.

Metal targets in the ground will produce a measure-ment which represents the target indication ± theground measurement. To measure the target alone,move the loop off to one side (being sure to holdthe loop directly on top of the ground mineral), andrelease and re-squeeze the trigger. Then move theloop back over the target. This should allow aproper D.C. PHASE reading for the target alone.

The relationship between D.C. PHASE, GroundBalance, V.D.I. number and Discrimination iscomplex. Results are not always repeatable invaried ground conditions. Ground and target re-sponses can distort the detection field of the loop ina number of ways, by bending, reflecting, absorbingand thus altering the phase and amplitude thedetector measures. This in turn produces inconsis-tencies in the relationships of these features.

When considering specific numbers it is importantto know D.C. phase is provided by the 15 kHzchannel without normalization. The V.D.I. scale isdistorted/expanded in the lower end of the scale(foil/nickel) and compressed in te higher end of thescale (copper/silver).

D.C. PHASEON OFF


(Display section)

Tips - In specific groundconditions, certain BasicAdjustments and ProOptions may producebetter performance. Bymeasuring the ground andtaking notes, such condi-tions may also be recog-nized in other areas anddealt with by using similarsettings.

10.5"

+ - 1 2 - + - + - 9 - + - + - 6 - + - + - 3 - + - + - 0

-82.2

The D.C. Phase of the ground has a relationshipto the proper Ground Balance setting. This is ofparticular interest to those who use the optionalCOARSE or FINE G.E.B. (Manual GroundBalance). Manual Ground Balance has a rangethat covers V.D.I. numbers from -95 - +10. AManual Ground Balance Coarse setting of 0equals a D.C. PHASE of negative -95. A Coarsesetting of 255 equals a D.C. Phase of +10. Asmentioned under COARSE and FINE G.E.B.,Ground Balance is not the same as EDITingthese V.D.I. numbers for REJECT. However, ifyour ground measures -90, ACCEPTingV.D.I. -90 will produce operational problems asthe detector will see the ground as a target. Withthe same logic, if a target measures -90, and theground measures -90, and the detector is GroundBalanced to this -90 ground, such a target will bevirtually invisible to the detector. These conditionswould be extremely rare however; the point isthere must be a difference between the target andthe ground for the target to be detected.

48


GRAPH ACCUMULATEON OFF


(Display section)

26. AccumulateON combines SignaGraph® information overmultiple loop passes, OFF shows SignaGraph®

information only from the last sweep of the loop.

Accumulate allows the SignaGraph® to continuallycollect information. This collecting of informationcontinues from one sweep of the loop to the next.Eventually, if only ACCUMULATE is selected,the SignaGraph® will completely fill, requiring thatthe TRIGGER be squeezed and released to clear itso that further information may be viewed. FADEis suggested to be used in combination with ACCU-MULATE so that noncurrent information graduallydisappears and excessive TRIGGERing is notrequired. FADE will gradually reset or clear theSignaGraph® to eliminate old information.

Tips - ON is suggested,since it takes severalsweeps of information torecognize trends.

GRAPH AVERAGINGON OFF


27. AverageEmphasizes the most common or predominateSignaGraph® indications.

AVERAGE does not necessarily allow showing ofall the available information on the SignaGraph®. Itaverages the information received, and shows thisaverage on the SignaGraph®. When used in combi-nation with ACCUMULATE it has more informa-tion to average, which results in more accurateindications of trends. FADE is suggested to clearthe display of old information, rather than excessiveTRIGGERing.

Tips - Most beneficialwhen used in combinationwith ACCUMULATE.AVERAGE ON is sug-gested as it reducesindications uncharacteris-tic of a particular target,which may occur due toloop angle or targetpositioning in the ground.

(Display section)

If ACCUMULATE is OFF, and AVERAGEis OFF, then SINGLE SWEEP is active.

SINGLE SWEEP displays SignaGraph®

information received during the current sweepof the loop, no more and no less. The nextsweep of the loop will clear all informationfrom the SignaGraph® and list the informationreceived only within that sweep. Fade is notneeded in the SINGLE SWEEP mode as eachpass of the loop will clear the display andprovide current information automatically.Several SignaGraph® indication samplesoccur during each sweep of the loop. It istherefore normal to see one or moreSignaGraph® bars, even in the SINGLESWEEP mode.

49


7FADE RATE

MIN MAX

(Display section)

28. FadeClears or fades noncurrent SignaGraph® informa-tion (bars).

FADE allows past information to automaticallyclear or fade from the SignaGraph®. Without Fade,or with too slow of a FADE rate, the SignaGraph®

will fill with information that is no longer valid asyou sweep through a search area.

A minimum setting of 1 equals the least degree offading. A maximum setting of 14 selects a veryquick fade rate. The SignaGraph® information willautomatically clear from the graph quickly. Ideally,a Fade Rate should be selected that allows time toadequately view the SignaGraph® information yetstill clear the graph in a timely manner.

Tips - Recommendedfor all but the SINGLESWEEP mode. Adjustthe rate of FADEing tohave time to view theSignGraph™ prior to itresetting. However, donot set it so slow as toshow noncurrentinformation. Settingsfrom 1 - 14 are avail-able.

50


2PREAMP GAIN

MIN MAX

(Preamp Gain section)

29. Preamp GainSelects the intensity of the signal received from theloop.

PREAMP GAIN (called Signal Balance on somemodels) is used to promote stability and perfor-mance. Like a sensitivity control, too muchPREAMP GAIN will result in unstable operationand unreliable indications. Unlike a sensitivitycontrol, PREAMP GAIN will have a substantialeffect on OVERLOAD.

For maximum detection depth, fine tune thePREAMP GAIN to the highest number settingwithout causing OVERLOAD, and/or unstableoperation. More adjustment levels (range) areavailable than what may be usable. You may neverencounter an area where maximum PREAMPGAIN can be used. Electrical interference maymake it difficult to receive an Air Balance at highPREAMP GAIN settings.

Selections such as MIXED MODE or AUDIODISC OFF may not allow as high a PREAMPGAIN level as other selections. This is normal assome of these modes naturally see more targets andground, and they may still provide superior perfor-mance and depth even with the lower PREAMPGAIN selection.

Every time the PREAMP GAIN level is changed,the detector should be re-ground balanced. Once inan operating mode, simply press ENTER to re-ground balance.

Tips - Higher levelsincrease detection depth.However, the detectormust be stable to be ableto recognize a target.OVERLOAD should notappear on the displaywhen only ground miner-als are present. Settingsfrom 1 - 4 are available.

51


2 FREQ. (BEST DATA) ON OFF

TO TURN ON PRESS ENTER

(Multi Frequency Method section)

30. 2 Frequency (Best Data)

Transmits and processes data continuously at both 3kHz and 15 kHz frequencies (salt eliminated).Automatically chooses to use only the data from themost reliable frequency (based on both magnitudeand phase) for each specific target.

Gold, nickel, and other lower conductive metalsrespond more reliably at higher frequencies. Cop-per, silver, and other higher conducting alloysrespond more reliably at lower frequencies. 2Frequency (Best Data) uses the multifrequencymode to cancel ground and salt and thenselects the most ideal frequency for that particulartarget alloy on a target by target basis.

31. 2 Frequency (Correlate)

Transmits and processes data continuously at both 3kHz and 15 kHz (salt eliminated). Compares data at3 kHz and 15 kHz. Target signals that do not pro-vide reasonably predictable information at both 3kHz and 15 kHz are automatically rejected. Irontypically doesn’t compare predictably betweenfrequencies and thus improved iron rejection can beexpected with the use of Correlate.

Differences in the target signal at 3 kHz and 15 kHzare predictable regarding valued metal alloys suchas gold, copper silver, etc.. If the two signals do notmatch within a reasonable range of predictability,most likely the target is not a valued metal andtherefore is rejected.

Multi Frequency MethodOnly one of the four available multifrequencymethods, BEST DATA, CORRELATE, 1 kHz,and 15 kHz, can be "ON" at any one given time.For example if BEST DATA is "ON", the re-maining three multifrequency options are auto-matically "OFF". To turn BEST DATA "OFF",requires the selection of one of the three remain-ing methods. In other words, an operator neverturns "OFF" a multifrequency method, theysimply select the desired method and turn it"ON", all other methods are automaticallyturned "OFF."

The MULTI FREQUENCY selection in useappears continuously on the bottom of the LCDdisplay during searching. The ideal multi fre-quency or single frequency setting will dependon many different factors such as the amount,degree, and type, of ground mineralization, thetypes of metal alloys most desired, as well aspersonal preferences. No one setting will beideal for all situations. A user should first trustthe factory preset settings for the general typesof searching and then experiment to find themost ideal settings for that particular area andtype of search. Generally multi frequencysettings are better suited to areas that have bothmagnetic (iron) and conductive (salt) compo-nents. Inland areas may vary in this regard withthe soils moisture content. For example dry soilmay present mostly iron type characteristicspossibly making one of the single frequencymodes a better choice. The same area when thesoil is wet may exhibit conditions similar to acombination of both iron and salt due to nonfer-rous metallic type mineralization’s greaterelectrical activity when wet. For example soilscontaining silver, copper, or nickel oxides/nitrates react differently in conditions from wetto dry. These soil traits can occur naturally andare typical of areas with mineral springs orvolcanic origins. However, be particularly awareof this wet/dry phenomena in farming areaswhere the soil mineralization is likely altered foragricultural purposes.

2 FREQ. (CORRELATE) ON OFF



52

V.D.I. Normalization - Used in the 1 frequency operat-ing modes to correct the skewing of the traditional(6.59 kHz) V.D.I. number display calibration. 2Frequency modes require Normalization and thus it isautomatically ON in both the 2 Frequency (Best Data)and 2 Frequency (CORRELATE) operating modes. Itis not an option in 2 Frequency modes.

When operating in the 1 Frequency (3 kHz) modeNormalization ON recalculates the V.D.I. displayinformation to represent traditional V.D.I. displaycalibration at White’s traditional frequency 6.59 kHz.

When OFF in the 1 Frequency (3 kHz) mode theV.D.I. scale is distorted/expanded in the higher end ofthe scale (copper/silver) and compressed in the lowerend of the scale (foil/nickel). This distortion can beused to provide higher display or discriminationresolution in this copper/silver coin area of the scale.DISC EDIT will have to be configured to take advan-tage of this expanded resolution.

When operating in the 1 Frequency (15 kHz) modeNormalization ON recalculates the V.D.I. displayinformation to represent traditional V.D.I. displaycalibration at White’s traditional frequency 6.59 kHz.

When OFF in the 1 Frequency (15 kHz) mode theV.D.I. scale is distorted/expanded in the lower end ofthe scale (foil/nickel) and compressed in the higherend of the scale (copper/silver). This distortion can beused to provide higher display or discriminationresolution in this foil/nickel area of the scale. DISCEDIT will have to be configured to take advantage ofthis expanded resolution. The advantage is goldjewelry and aluminum may be better sorted withhigher resolution in this foil nickel range.

V.D.I. NORMALIZED ON OFF


32. V.D.I. Normalization

1 FREQ. (3 KHZ) ON OFF


33. 1 Frequency (3 kHz)

1 Frequency (3 kHz) - Operates at 3 kHz exclusively.Provides for superior high iron mineral rejection anddepth when salt is not present. Also provides for betterdepth on higher conducting metals such as copper andsilver alloys.

1 Frequency (3 kHz) provides an alternate searchmode when iron (without the presence of salt) isextreme and the primary target is higher conductingmetals such as copper or silver. Some of White’s early1970 models operated at 3 kHz and are still reveredfor there performance in high iron black sands.

1 Frequency (15 kHz) - Operates at l5 kHz exclu-sively. Provides for superior performance in mediumto low mineralization (without the presence of salt)and/or when lower conducting gold and nickel rangetargets are the primary targets.

1 Frequency (15 kHz) provides an alternative searchmode when the ground minerals are not severe (with-out the presence of salt) and/or when lower conductingmetals such as gold/nickel are the primary targets.

34. 1 Frequency (15 kHz)1 FREQ. (15 KHZ)

ON OFF






0

20

40

60

80 15 kHz

6.5 kHz

3 kHz

100

dollarquarter

dimezn penny

pulltabnickel

foil

Normalization OFF

Normalization OFF chart for 3 kHz expands the high (copper/silver) end of the scale andcompresses the low (foil/nickel) end of the scale. In the 15 kHz mode the opposite occurs.The high end compresses and the low end expands.

53

Chapter 5 DFX™ EEPROM Programs

Factory Pre-Loaded CustomEEPROM Programs

White’s has pre-loaded each of the four customEEPROM Program positions for you. These pro-grams can be erased simply by developing yourown program, starting with any of the nine avail-able programs, and using the SAVE or NAMEfeature (pages 16-17).

The first five Factory Preset Programs are burnt intopermanent memory EPROM (Electronic, Program-mable, Read, Only, Memory). Although you canmake changes to these programs while in use, andyou can modify and copy/save them to theEEPROM positions for future use through batterychanges, the Factory Preset Programs will alwaysrevert to their original factory settings. Only theprograms saved in one of the four availableEEPROM positions will save through batterychanges.

Short term memory recall (ON and squeeze andrelease the trigger) will maintain changes to afactory program if a good battery remains in theunit. To assure you retain special settings it isadvised to Save or Name them in one of theEEPROM positions. Once you modify and Save/Name a factory program to one of the EEPROMpositions it is no longer a Factory Preset Programand thus will save for future use.

EEPROM stands for a special type of electronicmemory chip (Electrical, Erasable, Programmable,Read, Only, Memory). This memory chip allows theuser to store up to four of their own programs forfuture use through battery changes and storage.

To use a custom EEPROM Program Simply;1. Turn the detector ON and wait for the

Main Menu.2. Press ENTER to enter the Preset programs.3. Use ARROW DOWN to scroll down the

Preset Program pages/screens until you seethecursor beside the EEPROM programyou desire.

4. Press ENTER.5. Press ENTER again to LOAD the program.6. Air/Ground Balance and your ready to search

using the program stored in that position.

To store the current settings you are using do thesame thing only instead of LOAD, select SAVE orNAME. LOAD it when you want to use thosesettings again. Save or Name if you want to savethe DFX’s current settings.

The idea is that once you have determined yourpreferences for the particular features and settings,you can store that entire program in one of theEEPROM positions and have it ready for usewhenever you desire, without having to go throughall the options. Save your settings for future turn onand go use.

54

Chapter 5 DFX™ EEPROM Programs

Pre-Loaded EEPROM ProgramsEEPROM DP-SILVER (Deep Silver)

A good general purpose program where themajority of the trash is iron and small/medium foil and the majority of the expected targets are coins.

Popular performance modifications include:Turning ON V.C.O..Ground Filtering adjustment 2 for lower

minerals 3 medium minerals.AutoTrac Offset +2.Remember...if consistently digging a

particular trash target, simply make noteof the typical V.D.I. reference numbers,go to Disc Edit and change those specificV.D.I. numbers for rejection. Re-saveany changes if future use is desired.

EEPROM HI-TRASHProvides a primarily coin program targeted moretoward trashy public areas. Rejects commonaluminum at the sacrificing of some jewelry.Jewelry 18 K and above in the medium sizecategory is not likely to respond. However, areasof common abundant aluminum trash can besearched with good coin results as well as 14Kjewelry in the medium to small category. Theonly way to get all the jewelry is to dig all thealuminum, lead, and brass, which can be tediousto the point of frustration in trashy areas.

Popular Performance modifications include:Tone I.D. ONV.C.O. ONGround Filtering 2 for lower mineral areas,

4 for more mineralized areas.Auto Track Offset +2Visual Disc OND.C. Phase ONRe-save any changes if future use

is desired.

EEPROM DEMOPrimarily a showroom or bench program fortesting or demonstrating, likely the firstEEPROM slot an individual would choose tosave their own program in place of.

EEPROM HI-PROA high performance general purpose program notfor the meek at heart. Advanced features TONEI.D., V.C.O., wide open DISC EDIT acceptanceof all nonferrous (valued alloy) targets, and highSensitivity/Gain, make this program really singfor those who can handle the various audiopitches and depth of information. If you likesilent search, this isn’t the program for youSensitivities and Gains may need to be reducedin areas of heavy electrical interference.

Popular Performance modifications include;Mixed Mode ONTone I.D. OFFAutotrac Offset +5Ground Filtering 2 for lower

mineralization, 4 for highermineralization.

55

Preset Program Settings

BASIC ADJUSTMENTS:TARGET VOLUME 48 - 63AUDIO THRESHOLD 0 - 42TONE (AUDIO FREQ.) 0 - 255AUDIO DISC. ON/OFFSILENT SEARCH ON/OFFMIXED-MODE ON/OFFA.C. SENSITIVITY 1 - 85D.C. SENSITIVITY 1 - 60BACKLIGHT 0 - 6VIEWING ANGLE 1 - 50

PRO OPTIONS:RATCHET PINPOINT ON/OFFS.A.T. SPEED 0 - 10TONE I.D. ON/OFFV.C.O. ON/OFFMODULATION ON/OFFAUTOTRAC® ON/OFFTRAC VIEW ON/OFFAUTOTRAC® SPEED 1 -20AUTOTRAC® OFFSET -10 - +10TRAC INHIBIT ON/OFFCOARSE G.E.B. 0 - 255FINE G.E.B. 0 - 255DISC. EDIT -95 - +95BLOCK EDIT -95 - +95

LEARN ACCEPT ON/OFFLEARN REJECT ON/OFFRECOVERY SPEED 1 - 40BOTTLECAP REJECT 1 - 20HOT ROCK REJECT 0 - 20SWEEP SPEED 1 - 20GROUND FILTERING 2 - 6VISUAL DISC. ON/OFFICONS ON/OFFV.D.I. SENSITIVITY 0 - 99D.C. PHASE ON/OFFGRAPH AVERAGING ON/OFFGRAPH ACCUMULATE ON/OFFFADE RATE 1 - 14

PREAMP GAIN PREAMP GAIN 1 - 42 FREQUENCY (BEST DATA) ON/OFF2 FREQUENCY (CORRELATE) ON/OFFV.D.I. NORMALIZED ON/OFF1 FREQUENCY (3kHz) ON/OFF1 FREQUENCY (15 kHz) ON/OFF

AUDIO

G.E.B./TRAC

DISCRIM- INATION

DISPLAY

MULTIFREQUENCY

METHOD

COIN RELIC PROSPECTJEWELRY& BEACH

COIN &JEWELRY

5623231ONOFFOFF6830025

ON5

OFFOFFONONOFF

80

ONAUTOAUTO

5623231ONOFFOFF6830025

ON5

OFFOFFONONOFF

80

ONAUTOAUTO

5623

220ONOFFOFF6430025

ON5

ONONONONOFF

80

ONAUTOAUTO

5215215ONOFFON6545025

OFF7

OFFOFFONONOFF120

OFFAUTOAUTO

5813160OFFOFFOFF6850025

OFF9

OFFONONONON18+1

OFFAUTOAUTO

REJ. -95 - +95

ACC. +10 - +27

REJ. +28 - +49

ACC. +50 - +94

REJ. +95

REJ. -95 - -41

ACC. -40 - +95

REJ. -95 - -1

ACC. 0 - +9

REJ. -95 - -31

ACC. -30 - -1

REJ. 0 - +7

ACC. +8 - +94

REJ. +95

REJ. -95 - -31

ACC. -30 - -1

REJ. 0 - +7

ACC. +8 - +95

OFFOFF30415104

ONON80

OFFONON72

ONOFFONOFFOFF

OFFOFF20410104

ONON80

OFFONON72

ONOFFONOFFOFF

OFFOFF3045104

ONON80

OFFONON72

ONOFFONOFFOFF

OFFOFF2541554

ONOFF80

OFFONON82

ONOFFONOFFOFF

OFFOFF3011574

ONOFF80

OFFONON72

OFFOFFONOFFON

56

Custom EEPROM Program Settings

BASIC ADJUSTMENTS:TARGET VOLUME 48 - 63AUDIO THRESHOLD 0 - 42TONE (AUDIO FREQ.) 0 - 255AUDIO DISC. ON/OFFSILENT SEARCH ON/OFFMIXED-MODE ON/OFFA.C. SENSITIVITY 1 - 85D.C. SENSITIVITY 1 - 60BACKLIGHT 0 - 6VIEWING ANGLE 1 - 50

PRO OPTIONS:RATCHET PINPOINT ON/OFFS.A.T. SPEED 0 - 10TONE I.D. ON/OFFV.C.O. ON/OFFMODULATION ON/OFFAUTOTRAC® ON/OFFTRAC VIEW ON/OFFAUTOTRAC® SPEED 1 -20AUTOTRAC® OFFSET -10 - +10TRAC INHIBIT ON/OFFCOARSE G.E.B. 0 - 255FINE G.E.B. 0 - 255DISC. EDIT -95 - +95BLOCK EDIT -95 - +95

LEARN ACCEPT ON/OFFLEARN REJECT ON/OFFRECOVERY SPEED 1 - 40BOTTLECAP REJECT 1 - 20HOT ROCK REJECT 0 - 20SWEEP SPEED 1 - 20GROUND FILTERING 2 - 6VISUAL DISC. ON/OFFICONS ON/OFFV.D.I. SENSITIVITY 0 - 99D.C. PHASE ON/OFFGRAPH AVERAGING ON/OFFGRAPH ACCUMULATE ON/OFFFADE RATE 1 - 14

PREAMP GAIN PREAMP GAIN 1 - 42 FREQUENCY (BEST DATA) ON/OFF2 FREQUENCY (CORRELATE) ON/OFFV.D.I. NORMALIZED ON/OFF1 FREQUENCY (3kHz) ON/OFF1 FREQUENCY (15 kHz) ON/OFF

AUDIO

G.E.B./TRAC

DISCRIM- INATION

DISPLAY

MULTIFREQUENCY

METHOD

EEPROMDP-SILVER

EEPROMHI-PRO

NOTESEEPROMDEMO

EEPROMHI-TRASH

6015231ONOFFOFF7645025

ON7

OFFOFFOFFONOFF

8+0ONAUTOAUTO

5615231ONOFFOFF7030025

ON5

OFFOFFONONOFF

80

ONAUTOAUTO

5020

231ONOFFOFF6030530

ON5

OFFOFFONONOFF

80

ONAUTOAUTO

5813173ONOFFOFF7530025

OFF5

ONONONONOFF

80

ONAUTOAUTO

REJ. -95 - +14

ACC. +15 - +95

REJ. -95 - -41

ACC. -40 - +95

REJ. -95 - -31

ACC. -30 - -1

REJ. 0 - +7

ACC. +8 - +94

REJ. +95

REJ. -95 - +9

ACC. +10 - +27

REJ. +28 - +49

ACC. +50 - +94

REJ. +95

OFFOFF3045104

ONON90

OFFONON102

ONOFFONOFFOFF

OFFOFF3061573

OFFON80

OFFONON102

ONOFFONOFFOFF

OFFOFF30415104

ONON80

OFFONON72

ONOFFONOFFOFF

OFFOFF28310114

OFFON85

OFFONON113

ONOFFONOFFOFF

57

Glossary

All-Metal: Any mode or control setting allowing total acceptance of all metal types, iron, aluminum, tin, nickel,gold, brass, lead, copper, silver etc.

Audio ID: Circuitry which produces different audio tones (pitch) for different target's conductivity.Black Sand: One of the most extreme components of non-conductive, negative ground minerals. Magnetic.

Also called Magnetite (Fe304) or magnetic iron oxide.Cache: Any intentionally buried or secreted hoard of valuables.Conductive Salts: One of the major mineral types which make up the positive ground minerals. Wet ocean

salt/sand will produce a positive response due to its similar conductivity to metal.Conductivity: The measure of a metal target's ability to allow eddy currents on its surface.Depth: The greatest measure of a metal detectors ability to transmit an electromagnetic field into the ground.De-tuning: Method of manually or automatically desensitizing a metal detector so that it may locate the center

of a target.Discrimination: Circuitry which ignores or otherwise indicates, a specific target based on its conductivity/

phase.Drift: A loss or increase in threshold caused by temperature, time, or battery condition.Eddy Currents: Small circulating currents of electricity.Ferrous: Descriptive of any iron or iron bearing material.Frequency: The number of complete alternating current cycles produced by the transmit oscillator per second.Ground Balance: A state of operation in which specialized circuitry can ignore the masking effect ground

minerals have over metal targets.Hot Rock: A rock which contains a higher concentration of mineralization than the surrounding ground.Matrix: Refers to the total volume (average) of ground penetrated by a metal detector.Menu: Series of listings and prompts on a visual display designed to aid the operator in feature selection.Metal: Metallic substances: iron, foil nickel, aluminum, gold, brass, copper, silver, etc.Microprocessor: An electronic component that can be programed to perform certain electronic functions.Mineralized Ground: Any soil containing conductive or magnetic components.Mode: A condition of operation selected by the operator for specific functions.Motion Mode: Any mode that requires loop movement to respond to metals.Non-ferrous: Not of iron, any metal that is not iron.Non-Motion Mode: Any mode of operation that doesn't require movement of the loop to respond to metal

targets.Phase: The length of time between eddy current generation sustained on a metals surface and the resulting

secondary electromagnetic field effect on the loops receive winding.Pinpointing: Finding the exact center of a metal target.Reject: An indication of a target non-acceptance by silence or a broken sound.Sensitivity: The measure or capacity of a metal detector to perceive changes in conductivity within the loops

detection pattern.Signal: An audio or display response alerting the operator that a target has been detected.Stability: The ability of a metal detector to maintain smooth predictable performance.Target: Refers to any object that causes an audio or display indication.Visual ID: A feature which creates a visual indication to aid in identification of a target.VLF (Very Low Frequency): A metal detector that operates in the 3-30 kHz frequency range.

GlossaryGlossary

58

If for any reason you should sell your Spectrum DFX™ prior to the date the warrantyexpires, the remaining warranty is transferable. This transfer is authorized by calling 1-800-547-6911, and getting an Authorization Number.

Simply fill out the following information, including the Authorization Number, seal it in astamped envelope, and send it to White's Electronics, 1011 Pleasant Valley Road, Sweet Home,Oregon 97386. The remaining warranty period will then be available to the new owner.

The Warranty Statement applies to both the original owner as well as the second owner.

WARRANTY TRANSFERWARRANTY TRANSFERWARRANTY TRANSFERWARRANTY TRANSFERWARRANTY TRANSFER

Original Owner:

Name: __________________________________________________________Address (Which appears on the original warranty card):________________________________________________________________________________________________________________________________Instrument Serial Number: __________________________________________Date Code: ______________________________________________________Original Purchase Date:_____________________________________________

New Owner:Name: __________________________________________________________Address: ________________________________________________________________________________________________________________________________________________________________________________________Comments: ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Distributor Authorization Code: _______________________________________________

WARRANTY TRANSFER

Owner Info

59

If within two years (24 months) from the original date of purchase, your White's detector fails dueto defects in either material or workmanship, White's will repair or replace at its option, all necessary partswithout charge for parts or labor.

Simply return the complete detector to the Dealer where you purchased it, or to your nearestAuthorized Service Center. The unit must be accompanied by a detailed explanation of the symptoms ofthe failure. You must provide proof of date-of-purchase before the unit is serviced.

This is a transferable manufacturer warranty, which covers the instrument two years from theoriginal purchase date, regardless of the owner.

Items excluded from the warranty are non-rechargeable batteries, accessories that are not standardequipment, shipping/handling costs outside the continental USA, Special Delivery costs (Air Freight, NextDay, 2nd Day, Packaging Services, etc.) and all shipping/handling costs inside the continental USA 90days after purchase.

White's registers your purchase only if the Sales Registration Card is filled out and returned to thefactory address soon after original purchase for the purpose of recording this information, and keeping youup-to-date regarding White's ongoing research & development.

The warranty does not cover damage caused by accident, misuse, neglect, alterations,modifications, unauthorized service, or prolonged exposure to corrosive compounds, including salt.

Duration of any implied warranty (e.g., merchantability and fitness for a particular purpose) shallnot be longer than the stated warranty. Neither the manufacturer or the retailer shall be liable for anyincidental or consequential damages. Some states however, do not allow the limitation on the length ofimplied warranties, or the exclusion of incidental or consequential damages. Therefore, the abovelimitations may not apply to you.

In addition, the stated warranty gives you specific legal rights, and you may have other rightswhich vary from state-to-state.

The foregoing is the only warranty provided by White's as the manufacturer of your metal detector.Any "extended warranty" period beyond two years, which may be provided by a Dealer or other thirdparty on your detector, may be without White's authority, involvement and consent, and might not behonored by White's.

WHITE'S ELECTRONICS INC.WHITE'S ELECTRONICS INC.WHITE'S ELECTRONICS INC.WHITE'S ELECTRONICS INC.WHITE'S ELECTRONICS INC.LIMITED WARRANTY STATEMENTLIMITED WARRANTY STATEMENTLIMITED WARRANTY STATEMENTLIMITED WARRANTY STATEMENTLIMITED WARRANTY STATEMENT

Owner Info

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White's Service Centers

White's Authorized Service CentersWhite's Authorized Service CentersWhite's Authorized Service CentersWhite's Authorized Service CentersWhite's Authorized Service Centers

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White's Electronics1011 Pleasant Valley Rd.Sweet Home, OR 97386(541) 367 6121Fax (541) 367 [email protected]

1Electronic Exploration700 South MainLombard, IL 60148(630) 620-0618Fax (630) 620-1005Toll Free 800 392-3223*[email protected]

2Geoquest106 US Hwy 46Saddlebrook, NJ 07663(973) 772-7443Fax (973) 772-7773Toll Free 877 772-7443*[email protected]

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Centreville Electronics13810 B Braddock Rd.Centreville, VA 20121(703) 631-0202Fax (703) 222-8625Toll Free 888 645-0202*[email protected]

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White’s reputation has been built on quality products backed byquality service. Our Factory Authorized Service Centers are factory trainedand equipped. They offer the same quality service as the factory. Servicebefore and after the sale is the cornerstone of our customer relations.

A. Contact your Dealer. There may be a quick,simple fix or explanation that will prevent havingto send the detector in for service.

B. Double check the obvious, such as batteries,and try the detector in another area to be sure thereisn't interference.

C. Be sure to send all necessary parts with yourdetector, such as batteries and holders, as theseitems can result in symptoms.

Before shipping detectors for serviceBefore shipping detectors for serviceBefore shipping detectors for serviceBefore shipping detectors for serviceBefore shipping detectors for service

D. Always include a letter of explanation aboutyour concerns, even if you have talked to theService Center by telephone.

E. Take care in packaging instruments for ship-ping. Always insure your package.

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