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GDP3224 Field Operators Guide

Table of Contents Introduction System Syncing

GPS Sync Manual Sync Sync Check

System Check Quick Test Example Overnight Test Example

CR Setup and Operation Describing the Survey Layout

N-Space Station Numbers Other Layouts and Setup

Data Collection and QC Gain Modes Results Screens

Time Schedule Viewing the Data Cache Calibrating and System Check Lab Rock Measurements

GDP as Transmitter Controller with Reference Recording TDIP Setup and Operation

Describing the Survey Layout N-Space Station Numbers Other Layouts and Setup

Data Collection and QC Gain Modes Results Screens

Time Schedule Viewing the Data Cache Calibrating and System Check Lab Rock Measurements

TEM Setup and Operation Describing the Survey Layout Data Collection and QC

Gain Modes Results Screens

Time Schedule Viewing the Data Cache Calibrating and System Check

Table of Contents cont. CSAMT Setup and Operation

Describing the Survey Layout Data Collection and QC



AMT Setup and Operation Describing the Survey Layout Data Collection and QC



Networking the GDP and transferring data

The GDP3224 has many improvements over the GDP32II. The benefits of the higher resolution 24-bit converter include data of higher quality and lower noise. The operator interface has been improved and incorporates many suggestions made by the field personnel. Having the control and setup parameters on the same screen allows the operator to change and verify all settings at once.

The on screen oscilloscope view takes advantage of this by allowing channel parameters such as gain and SP to be adjusted while the scope is running. The operator can see the affect that these changes have on the analog signal immediately. This can help in determining if the channel has too much gain or offset and needs some manual adjustment.

The real time viewing of results during data collection now shows the results of the last five stacks on the same screen. You can select which calculated parameter to show, and watch the values as they come in. This allows the operator to make quick assessments of the data quality to determine when enough good stacks have been taken..

The data cache has been changed from inefficient pure ASCII to a structure of ASCII meta data with the data stored in binary format. This facilitates the option of recording the complete time series for every block. Also the system and antenna calibrates are stored with the data block so there is never a question as to what calibrate was used.

System calibrates use many more parameters as keys into the board calibrates allowing multiple filter settings to remain in the calibrate file at the same time. Calibrates are also cumulative so you can take new calibrates as needed without losing previous calibrates .

Other improvements: • An SC-8 is no longer needed. Its capabilities have been built into the 24-bit

board. • Station locations can be entered as full 3-dimentional coordinates. • System checking shows comparisons between current data and previously taken

board calibrates. Automatically stops taking data if various limits are exceeded.

This Field Operators Guide is written to be a quick reference guide for use in the field. More details are discussed in the GDP3224 manual.

Introduction

The overall procedure and the order in which things need to be done has not changed from the GDP32II. Here is an overview with the details not discussed here: • Turn on the crystal and let it warm up about an hour. The crystal needs to

stabilize to the nominal frequency before doing any type of syncing or board calibrates.

• Sync the GDP using either Manual or GPS mode.

System Syncing

Start the SYNC program.

Introduction

The Sync program is where all of the GDP syncing and sync checking is done. It provides the following functionality: • Manual or GPS Sync Selection. • Complete GPS Info and Status. • Use GPS Time, Local Time, or

manually set time. • Manual Crystal Adjust. • Sync Check between XMT and

multiple GDPs.

When first powered up, the GDP is not in sync with anything. The Crystal frequency however, is being disciplined by the GPS board. The frequency being displayed is accurate. The GDP time and date has been loaded from the CPU clock.

Suggestion: It is best to let the Crystal warm up for at least an hour before doing any type of sync. Even GPS sync must start with the crystal frequency within range.

Which Sync type are you using?

GPS – Wait until Crystal is at least 50% stable. Manual – Press

NEXT FIELD

Pg Dn

SELECT DN

EndPress then

XTAL

GPS Sync -

MODE will now say GPS SYNC.

Then press 1 to enter GPS time setting mode. By setting the differentials appropriately you can set the GDP time to Local Time, UTC Time, or raw GPS Time.

TIME

Raw GPS Time: Set Local Time Differential to 0:0, GPS Leap Second Offset to 0.

UTC Time: Set Local Time Differential to 0:0, GPS Leap Second Offset to current value.

Local Time: Set Local Time Differential to local difference from UTC, GPS Leap Second Offset to current value.

GPS Leap Second Offset is used to account for the fact that the Earth is rotating slightly slower than 86400 seconds per day. Because of this, every few years the official timekeepers announce that another second needs to be subtracted from the raw GPS time to match with UTC time. The GDP website shows the offset to use.

Enter

CONTINUE

Escape

STOP AVG

Loads the time shown in the GPS Local Time field into the GDP time. Time will be synchronized to the GPS 1PPS signal.

Escapes without changing the GDP time.

Warning: If you have a Timeout error getting into either Manual Mode or GPS Mode, it is best to turn off Crystal Power and start the Sync program again. Even if the MODE seems correct, it cannot be trusted. Also a PC-104 timeout may occur at random times. This type of timeout can be ignored by pressing the SPACE button.

Manual Sync -

MODE will now say MANUAL SYNC.

TIME

Multiple GDP syncing can be done using a Multi-Sync box (Zonge PN: MULT/SY-32).

One XMT together with up to four GDPs can be synchronized by this method.

The crystal sync to an XMT procedure has not changed. First stop the phase meter on the XMT by adjusting the GDP crystal. Pressing the RESET button on the XMT will sync the PERIOD on both. The meters on the GDP are not active until in the Sync Check mode.

Then press 2 to enter the GDP time manually.

To sync time to another GDP, set the time on the GDP to the next minute. Get ready to press CONTINUE the instant you see the other GDP reach that minute with 0 seconds. Now when you press the XMT Reset button, all GDPs should be stopped at the same second. When the Reset button is released, the clocks on all GDPs will start again and they will all be synchronized to within a microsecond.

Once the crystals are synced, press Enter

CONTINUE

Sync Check -

Synchronization can be verified for both modes. The sync of multiple GDPs to an XMT can be checked at once.

Escape

STOP AVGStart the Sync Check application. Exit without Sync Checking

Warning: Watch for an ‘!’ next to a channel number. It indicates that particular board has not been calibrated for the current frequency or filter settings. Use the CSAMT program to calibrate the board.

The easiest setup is to use IREF so no external wiring needs to be done to connect the CAL output to Channel 1. If this is still desired, set the channel to EREF. Any channel can be set as the REF channel, and any other channel can be set as an XMT or GDP.

The θ(mr) column shows the measured phase for each channel.

The dθ(mr) column shows the phase of channels compared to the REF channel.

In GPS mode, the REF phase is compared to the GPS phase to check the GPS sync of this GDP.

There is a Sync Check binary cache created which can be review manually by looking at the phase values in the ASCII meta data. Its default name is 24SNCCK.CAC, or you can archive it with any name.

Enter

CONTINUETake Sync Check data

Back to Main Menu.

System Check

Introduction

The System Check program is where the GDP hardware can be tested for proper functionality: • Compares System Check results

to board calibrates. • Run Internal or External Checks

so other equipment can be checked.

• Auto-increment frequency or run one frequency at a time.

• Set phase difference limits to alert when problems are detected.

Start the SYSCHK program.

The first screen is the CARDS screen. Here you can see the Serial Number, Version and Features Code of each board. NOTE: This is a good time to enter the GDP Case Serial Number. This number must be manually entered since it cannot be read by the GDP software.

Field Description:

VOLTS: Calibrator output voltage. Ranges from 1.82mV to 8.0 V. METHOD: ONESHOT - Run only the current frequency.

AUTOFREQ – Starting from the current frequency, automatically increment to the next frequency, doubling the Cycles as well.

dθ LIM: The limit in milli-radians of allowable phase difference from stack to stack. dCal% LIM: The limit in percent that the raw mag and phase can differ from the

calibrate values for the board. Exceeding one of the Limits will stop the acquisition with an error message.

To view this part of the screen – Press PREV FIELD

Pg Upthen

To move back – Press then SELECT UP

Home

Quick Test Example

This is a quick test that will tell you if the GDP is taking correct data. It uses a small test voltage of 3 mV and no channel gain so any noisy channels should stand out. It also uses a small number of cycles so phase problems will not be averaged out.

The Mag and θ(mr) columns show the calibrated values for the last stack. Note that Channel 4 is missing a board calibrate. Its values are raw values.

The SEM θ column shows the SEM of the phase for each channel from the last stack.

The SEM θ reps column shows the phase SEM accumulated over all stacks.

Enter

CONTINUETake System Check data

Set up the GDP as shown in the screenshot below. • In the VOLTS field, type 3m or you can type .003 to enter 3mV. • Note that two stacks are the lowest number of Stacks to take in order to see

Max/Min comparisons. • dθ LIM = .5 means the program will stop if the phase of a channel from stack to

stack is more than 0.5 milli-Radians different. • dCal% LIM = 3 means the program will stop if the magnitude or the phase of a

channel differs from its calibrate values by more than 3%.

until the MAG/PH Screen is shown. Press

The θ Max and θ Min columns show the maximum and minimum calibrated phase values for all stacks.

The MagMax and MagMin columns show the maximum and minimum calibrated magnitude values for all stacks.

Note that since Channel 4 is missing a board calibrate, its max and min values are showing its raw, uncalibrated data.

to view the MAX/MIN Screen. Press

to view the CAL/RAW Screen. Press

The θ Cal column shows the calibrate phase for each channel.

The θ Raw column shows the phase for each channel from the last stack.

The MagCal column shows the calibrate magnitude for each channel.

The MagRaw column shows the magnitude for each channel from the last stack. Note that the Raw Magnitude is scaled by the Test Volts so it can be compared to the 1.0 V Calibrate Voltage.

Note that Channel 4 is missing a board calibrate. Its default calibrate values are not used in determining errors.

Overnight Test Example

A more extensive overnight test can be run. This example will start at 0.5 Hz, and automatically increment through all frequencies, talking multiple stacks of each. It will use the 3 mV signal, but auto-gain once for each frequency. When set up with these values, the GDP will run for about eight hours. If there is any reading from any channel that falls outside the limit settings, the program will stop and display an error message. If the program finishes, you know there were no errors the entire night.

Setup:

FREQ: 0.5 Hz CYCLES: 32 STACKS: 30 GAIN: YES NOTCH: Based on field use. METHOD: AUTOFRQ dθ LIM: 1 dCal% LIM: 10.

During the testing, the program may stop because one of the limits was exceeded. A message will appear, and the screen associated with the exceeded limit will be shown.

If the MAX/MIN screen is shown, the dθ limit was exceeded. You will be able to look at the θ Max and compare to the θ Min to determine if one or more channels caused the problem. The STACKS count will show how many stacks were successfully taken at the Frequency shown before the error occurred.

If the CAL/RAW screen is shown, the dCal% limit was exceeded. The message will tell you whether it was the Magnitude or Phase that was out of range. You can compare the Raw versus the Cal values to determine if one or more channels were at fault.

GDP Setup and Operation for CR

This section will describe the parameters and options available for the CR program. A lot of details are discussed in the GDP3224 manual, but this is written as more of a quick reference guide for operators in the field. There is much commonality between all programs, but this chapter will highlight things that pertain specifically to CR. Also many of the GDP settings and fields are the same as with the GDP32II, so learning the new and improved items are hopefully intuitive and make sense. The overall procedure and the order in which things need to be done has not changed from the GDP32II. Here is an overview with the details not discussed here: • Turn on the crystal and let it warm up about an hour. The crystal needs to



• Make sure calibrates are up to date.

• Run System Checks as desired.

to start the CR program. Press

Describing the Survey Layout on the GDP -

Decide ahead of time whether the survey layout will be defined by n-spacing or station numbers. If you are using n-spacing to describe dipole locations, then do not change anything in the Station Number fields. Use these fields to help you verify that your entries are correct. If you are using Station Numbering, then do not change the n-spacing field. Use it for reference only, along with the Length field, to verify your Station Number entries are giving the expected results.

Setup using N-Spacing (Dipole-Dipole)

Describing the survey setup using N has not changed. It is still defined as the number of dipole spaces between TX and RX dipoles. Other definitions are the same but with different names: TX:AX (old TX) = Lowest number of the TX dipole. TX:BX = the other TX electrode number (automatically calculated). RX0:RX (old RX) = Lowest number of the RX dipole closest to the TX dipole. A-SPACE = length of dipole in Feet or Meters (change M or Ft here). S-SPACE = station numbers in a dipole. When using N-spacing, set this to 1 so there

is one station number increment for each dipole.

Example N-Space Setup from a Seven Spread

1) Set TX:AX to 4. 2) Press

Notice that TX:BX became 5. 3) Set RX0:RX to 2. 4) Move into Channel 1 N field. 5) Set to 1. 6) Notice that F4 has changed to

RST_N-SPC. Press until N’s are as shown.

The F4 button will have different functions depending on which field the cursor is in. When the cursor is in the lower part of the screen, it is set to RST_TX. Here it will reset various transmitter location items. When in the channel Component Type column, it changes to CH_OFF/ON and it is pressed to turn a channel OFF. When in the Offset column it changes to RST_OFSET, and in the N column, it becomes RST_N-SPC. In this mode you can set the desired N for any one channel, press F4 and it will set the rest of the channels automatically. If it does not match your desired setup, try pressing it again. It cycles between two possible setups.

Example moving the TX down

The TX dipole has moved down one electrode. It is now overlapping the RX dipole connected to Channel 1. This channel must be turned off and disconnected.


Notice that TX:BX became 4. Also note that the N numbers all shifted down correctly.

3) Set RX0:RX to 1. 4) Move into Channel 1 “Cmp

Typ” field. Press to turn CH 1 OFF.

The N spacing values are automatically keyed to the TX:AX entry. If the TX dipole moves, it is assumed that all GDP channels will are still wired to the same electrodes, therefore their N value must change since the transmitter has moved either closer to or further from the RX dipoles.

Warning: It is very important to actually pull the electrode wires from a channel that becomes too close to a transmitter electrode. The high energy from the transmitter can damage the front end circuitry of the GDP, even if the channel is turned off.

Setup using Station Numbers (Dipole-Dipole)

Describing the survey setup using station numbers is more convenient and descriptive than using the N-spacing method. Using this approach, you can use complete three dimensional coordinates to locate electrodes, and all dipole lengths and spacing will be calculated from these.

The concept of the S-SPACE: Since this method uses station numbers to describe electrode locations, we need to know the distance associated with difference between two stations. The S-SPACE parameter gives this information by indicating the number of stations in a dipole. In the same way, A-SPACE gives the number of feet or meters in a dipole. This allows for station numbers to be any type of layout coordinate system – anything from UTM coordinates (S-SPACE = A-SPACE in meters), to one station per foot (S-SPACE = A-SPACE in feet), or three stations per dipole (S-SPACE = 3), or even 10 dipoles per one station increment (S-SPACE = 0.1). You could even have station numbers in 10 foot increments while the dipole lengths are in meters (A-SPACE = 100 M, S-SPACE = 32.8).


Notice that TX:BX became 5. 3) Set RX0:RX to -2. 4) Move into Channel 1 Offset. 5) Set to 4. 6) Notice that F4 has changed to

RST_OFSET. Press until Offsets are as shown.

Definitions of fields when using station numbers: TX:AX = Lowest number station of the TX dipole. TX:BX = the other TX electrode station number (automatically calculated). RX0:RX = RX base station number. Channel offsets are from here. This is offset 0. A-SPACE = length of dipole in Feet or Meters (change M or Ft here). S-SPACE = length of a dipole in stations. If this is 1, there is one station number

increment per dipole. If this is the same number as A-SPACE, the stations are numbered as one foot or meter per station.

Example Station Number Setup from a Seven Spread

For this example, we will use Station -2 to be the RX reference station. Since this electrode is the lowest number connected to Channel 5, its offset is 0.

Definitions of fields when using station numbers: RX1 = Lowest number station connected to a channel. RX2 = Larger of the two station numbers connected to a channel. RX1-RX0 Offset = Station number offset between the lowest number station of a channel and the reference station number. Length Ft/M = 3-Dimensional distance between electrodes in Feet or Meters.



Notice the channels are still connected to the same electrode stations, so the channel offsets do not change. Only the transmitting electrodes have physically moved.

1) Press and move to TX:AX

2) Press to set TX:AX to 3. Notice that TX:BX became 4. 3) RX0:RX stays at -2.

4) Press

5) Move into Channel 1 “Cmp


SELECT DN

End


Moves quickly to different areas of the screen.

Other Array Types and Layouts -

Data collection and QC -

Until the GAIN/CRES Screen is shown.

Perform a Contact Resistance check at any time.

Warning: Watch for an ‘!’ next to a channel number. It indicates that particular board has not been calibrated for the current frequency or filter settings.

You can take a small stack with GAIN set to ONCE to verify that the Auto-Gain results look good. The RESULTS Screen appears. To get back to the

GAIN Screen.

If desired, you can move the cursor to a channel and use the scope view to get an idea of signal amplitude and offset.

Note: The SCOPE option for F5 will appear when the cursor is in the Channel Table. The Scope will show the channel of the line the cursor is on. You can adjust the Gain and SP Offset and watch the affect in real time on the scope.

SCOPE

Gain Choices: • ONCE – Gains on the first stack taken whenever there is a change that may

effect the gain. After gaining once, gain mode is set to DONE. • DONE – Resets gain mode back to ONCE whenever a change is made that

might require a re-gain. • ALWAYS – Does a complete auto-gain before each stack. • SPONLY – Re-adjusts the SP Offset before each stack. • MAN – Manual settings for Gain and Offset are used and never changed

automatically.

Until the STACKS Screen is shown.

The STACKS screen will show the results of the last 5 stacks to give an easy way to judge data quality and repeatability. The values will fill in as each stack is completed. You can press STOP AVG whenever enough stacks with acceptable values have been collected. You can select what to view: Move the cursor to the Rho field.

SELECT DN

End

SELECT UP

Home

Mag -> Ph -> SEM -> 3Pt -> Rho -> Mg3 -> Ph3 -> Mg5 -> Ph5 -> Mg7 -> Ph7 -> Mg9 -> Ph9

Make sure the TIME SERIES selection is set to YES if you are intending to record complete time series data in addition to the stacked period and calculated values.

Moves quickly to the Time Series field.

GDP as Transmitter Controller with Reference Recording

In this application a GDP is used in place of an XMT to control the frequency of the transmitter. At the same time, it is set up with one channel as the reference channel to record the transmitter’s current waveform as a time series. The idea here is that this reference GDP will continuously record the current reference while the receiving GDPs will record whatever number of stacks are necessary to acquire good data. All of the stacks are given a time stamp that records the time of the first sample in the time series. When the data caches are processed, the time series segments from the receiving GDPs can be lined up with the long TX reference time series. In this way it doesn’t matter when the receiving GDPs are started and stopped, as long as the TX reference GDP is also recording during this time.

Warning: never connect the reference output of a transmitter directly to a GPD. An ISO Amp must be used to avoid burning out the front end of the GDP analog circuitry.

• Make sure Time Series is Yes. • Set up one of the channels as

the Ref channel. • Turn all other channels OFF. • Set STACKS to 1. • Set SENSE resistor value.

(Current will be calculated once first stack is taken)

• Set GAIN to MAN • Manually set the gain to 00-0. • Set the frequency. • Before transmitting, take one

stack with a few cycles to allow GPS sync to occur.

• Now you can get the transmitter transmitting and adjusted.

• Take one stack with a few cycles so the reference current will be calculated.

• Verify the magnitude is not saturating (around 2V). If it is, put in a -1 or a -2 attenuation to bring it below 2V.

• Use the Scope view to verify the SP Offset is centered. Manually adjust the SP as needed.

Warning: Whenever the frequency has changed it is best to take one stack with a small number cycles without the Transmitter transmitting. Whenever the frequency has changed, the first stack will validate the GPS sync and do a re-sync if necessary. During the GPS syncing process, the TX frequencies may change abruptly.

Activate and de-activate the Scope while the cursor is on the channel to be viewed.

• Move to Cycles field.

At this point, the GDP is ready to acquire the TX current reference waveform time series. The GDP gain and SP has been set up. Once a receiving GDP is ready, the Transmitter should be running with the same settings used during setup. The current shown on the GDP should be close to the TX reading, but does not need to be exact. That is why the Current Reference waveform is being recorded. You should start collecting data with this TX reference GDP first, before the receiving GDP. This GDP should be continuously recording the entire time a receiving GDP is collecting stacks. It should only be stopped when the receiving operator is ready to change frequencies.

SELECT UP

Home

Until the max cycles is reached.

• Note the TIME field. This is the maximum amount of time the reference waveform can be recorded for each stack.

Suggestion: It is best to Archive the cache before taking each long time series.

Enter

CONTINUE Start recording the TX Reference Time Series.

Notice the Progress Bar. It indicates how much longer the GDP can collect the continuous time series. In this case, there are about 29 minutes remaining. If the receiving GDP cannot finish its stacks in this time, it is best to stop this time series, archive the cache, and start again.

Escape

STOP AVG

Enter

CONTINUEStop recording the TX Reference Time Series.

Save It!

GDP Setup and Operation for TDIP

This section will describe the parameters and options available for the TDIP program. A lot of details are discussed in the GDP3224 manual, but this is written as more of a quick reference guide for operators in the field. There is much commonality between all programs, but this chapter will highlight things that pertain specifically to TDIP. Also many of the GDP settings and fields are the same as with the GDP32II, so learning the new and improved items are hopefully intuitive and make sense. The overall procedure and the order in which things need to be done has not changed from the GDP32II. Here is an overview with the details not discussed here: • Turn on the crystal and let it warm up about an hour. The crystal needs to



• Make sure calibrates are up to date.

• Run System Checks as desired.

to start the TDIP program. Press

Describing the Survey Layout on the GDP -

Decide ahead of time whether the survey layout will be defined by n-spacing or station numbers. If you are using n-spacing to describe dipole locations, then do not change anything in the Station Number fields. Use these fields to help you verify that your entries are correct. If you are using Station Numbering, then do not change the n-spacing field. Use it for reference only, along with the Length field, to verify your Station Number entries are giving the expected results.

Setup using N-Spacing (Dipole-Dipole)

Describing the survey setup using N has not changed. It is still defined as the number of dipole spaces between TX and RX dipoles. Other definitions are the same but with different names: TX:AX (old TX) = Lowest number of the TX dipole. TX:BX = the other TX electrode number (automatically calculated). RX0:RX (old RX) = Lowest number of the RX dipole closest to the TX dipole. A-SPACE = length of dipole in Feet or Meters (change M or Ft here). S-SPACE = station numbers in a dipole. When using N-spacing, set this to 1 so there

is one station number increment for each dipole.

Example N-Space Setup from a Seven Spread


Notice that TX:BX became 5. 3) Set RX0:RX to 2. 4) Move into Channel 1 N field. 5) Set to 1. 6) Notice that F4 has changed to

RST_N-SPC. Press until N’s are as shown.

The F4 button will have different functions depending on which field the cursor is in. When the cursor is in the lower part of the screen, it is set to RST_TX. Here it will reset various transmitter location items. When in the channel Component Type column, it changes to CH_OFF/ON and it is pressed to turn a channel OFF. When in the Offset column it changes to RST_OFSET, and in the N column, it becomes RST_N-SPC. In this mode you can set the desired N for any one channel, press F4 and it will set the rest of the channels automatically. If it does not match your desired setup, try pressing it again. It cycles between two possible setups.




Notice that TX:BX became 4. Also note that the N numbers all shifted down correctly.

3) Set RX0:RX to 1. 4) Move into Channel 1 “Cmp


The N spacing values are automatically keyed to the TX:AX entry. If the TX dipole moves, it is assumed that all GDP channels will are still wired to the same electrodes, therefore their N value must change since the transmitter has moved either closer to or further from the RX dipoles.


Setup using Station Numbers (Dipole-Dipole)

Describing the survey setup using station numbers is more convenient and descriptive than using the N-spacing method. Using this approach, you can use complete three dimensional coordinates to locate electrodes, and all dipole lengths and spacing will be calculated from these.

The concept of the S-SPACE: Since this method uses station numbers to describe electrode locations, we need to know the distance associated with difference between two stations. The S-SPACE parameter gives this information by indicating the number of stations in a dipole. In the same way, A-SPACE gives the number of feet or meters in a dipole. This allows for station numbers to be any type of layout coordinate system – anything from UTM coordinates (S-SPACE = A-SPACE in meters), to one station per foot (S-SPACE = A-SPACE in feet), or three stations per dipole (S-SPACE = 3), or even 10 dipoles per one station increment (S-SPACE = 0.1). You could even have station numbers in 10 foot increments while the dipole lengths are in meters (A-SPACE = 100 M, S-SPACE = 32.8).


Notice that TX:BX became 5. 3) Set RX0:RX to -2. 4) Move into Channel 1 Offset. 5) Set to 4. 6) Notice that F4 has changed to

RST_OFSET. Press until Offsets are as shown.

Definitions of fields when using station numbers: TX:AX = Lowest number station of the TX dipole. TX:BX = the other TX electrode station number (automatically calculated). RX0:RX = RX base station number. Channel offsets are from here. This is offset 0. A-SPACE = length of dipole in Feet or Meters (change M or Ft here). S-SPACE = length of a dipole in stations. If this is 1, there is one station number

increment per dipole. If this is the same number as A-SPACE, the stations are numbered as one foot or meter per station.

Example Station Number Setup from a Seven Spread

For this example, we will use Station -2 to be the RX reference station. Since this electrode is the lowest number connected to Channel 5, its offset is 0.

Definitions of fields when using station numbers: RX1 = Lowest number station connected to a channel. RX2 = Larger of the two station numbers connected to a channel. RX1-RX0 Offset = Station number offset between the lowest number station of a channel and the reference station number. Length Ft/M = 3-Dimensional distance between electrodes in Feet or Meters.



Notice the channels are still connected to the same electrode stations, so the channel offsets do not change. Only the transmitting electrodes have physically moved.

1) Press and move to TX:AX

2) Press to set TX:AX to 3. Notice that TX:BX became 4. 3) RX0:RX stays at -2.

4) Press

5) Move into Channel 1 “Cmp


SELECT DN

End


Moves quickly to different areas of the screen.

Other Array Types and Layouts -

Data collection and QC -

Until the GAIN/CRES Screen is shown.

Perform a Contact Resistance check at any time.

Warning: Watch for an ‘!’ next to a channel number. It indicates that particular board has not been calibrated for the current frequency or filter settings.

You can take a small stack with GAIN set to ONCE to verify that the Auto-Gain results look good. The RESULTS Screen appears. To get back to the

GAIN Screen.

If desired, you can move the cursor to a channel and use the scope view to get an idea of signal amplitude and offset.

Note: The SCOPE option for F5 will appear when the cursor is in the Channel Table. The Scope will show the channel of the line the cursor is on. You can adjust the Gain and SP Offset and watch the affect in real time on the scope.

SCOPE

Gain Choices: • ONCE – Gains on the first stack taken whenever there is a change that may

effect the gain. After gaining once, gain mode is set to DONE. • DONE – Resets gain mode back to ONCE whenever a change is made that

might require a re-gain. • ALWAYS – Does a complete auto-gain before each stack. • SPONLY – Re-adjusts the SP Offset before each stack. • MAN – Manual settings for Gain and Offset are used and never changed

automatically.

Until the STACKS Screen is shown.

The STACKS screen will show the results of the last 5 stacks to give an easy way to judge data quality and repeatability. The values will fill in as each stack is completed. You can press STOP AVG whenever enough stacks with acceptable values have been collected. You can select what to view: Move the cursor to the Rho field.

SELECT DN

End

SELECT UP

Home

Vp -> M -> Rho -> SEM -> Win1 -> Win2 -> Win3 -> Win4 -> Win5 -> Win6 -> Win7 -> Win8 -> Win9 -> Win10 -> Win11 -> Win12 -> Win13

Make sure the TIME SERIES selection is set to YES if you are intending to record complete time series data in addition to the stacked period and calculated values.

Moves quickly to the Time Series field.

Networking the GDP

Start the NET utility.

Introduction

The easiest way to transfer files to or from the GDP is over the network. The GDP can either be connected directly to a computer using a crossover cable, or connected automatically to a LAN. The network connection can be used to: • Retrieve data files from the GDP. • Transfer antenna cal files to the GDP. • Install the latest operating programs

on the GDP. • Place identical Time Schedules on

multiple GDPs.

When first powered up or after a reset, the network will not be loaded. At this point there are three connection choices: • Connect to Computer

using Manual Settings • Connect to Network using

Automatic Settings • Connect to Network using

Manual Settings

The symbols around the NET function key label indicate if the network is loaded or not. If it is shown as +NET+, the network is currently loaded and ready for use. If it is shown as -NET-, the network is not presently loaded and must be started.

Which type of connection are you using?

Directly to a computer– This type of connection is used mostly for transferring data files to a laptop in the field. Requires manual settings on both the GDP and the computer.

To a Local Area Network– This type of connection is used in an office setting or a connection to a router. Most often the network has a DHCP server so automatic settings can be used. Otherwise, a valid IP address must be manually entered into the GDP.

Connecting Directly to a Computer -

This screen indicates that the GDP network drivers have been loaded correctly.

At this point, verify that the settings are correct.

Also included here are troubleshooting instructions in case you are having difficulty with connecting. Press F1 (more) for more pages of instructions.

When the NET program is first started, it is set up for Manual connection to a computer using the same IP settings which were last used. The recommended settings are:

Recommended Settings for GDP:

IP Address: 192.168.001.003

Subnet Mask: 255.255.255.000

These address settings are commonly used when connecting computer to computer. However, any numbers can be entered here. If the computer is already using a manually entered IP address, the GDP address can be set to be compatible with it. That way the computer’s IP address will not need to changed. Here are the rules to follow in setting an IP address for the GDP:

Rules for setting the IP addresses of the GDP and computer:

IP Address: mmm.mmm.mmm.ddd

Subnet Mask: mmm.mmm.mmm.mmm

The numbers shown as mmm.mmm.mmm must match the same numbers in the IP address of the computer. The numbers shown as ddd must be different from the computer.

The Subnet Mask of both the GDP and the computer must match exactly.

Enter

CONTINUEOnce the numbers are correctly entered into the GDP, press to load the GDP network drivers.

Now connect the GDP to the computer using a crossover cable (Zonge PN: CROSS).

Setting up the computer -

To connect directly to a GDP using manual settings, the computer will need to be set up with either completely manual IP settings, or set up to use an Alternate Configuration. The Alternate Configuration is the best approach to use. That way whenever you connect the computer to a GDP, the same Alternate Configuration will be used and it will not need to be set up again.

Start Control Panel by using the START Button:

Click Network and Sharing Center:

Click Change adapter settings:

Double-Click Local Area Connection:

Double-Click Internet … 4 (TCP/IPv4):

Click Properties:

Windows has a two minute timeout for anything related to networking. When you connect the computer to the GDP, you will need to wait at least two minutes. Windows must determine that it will not receive an automatic IP configuration from the GDP. Then it will set itself up with the Alternate Configuration you have entered.

Click Alternate Configuration:

Set up the IP address, Subnet mask, and Default gateway as shown.

It is best to have this computer at the base address of .002. That way if you have multiple GDPs connected through a network switch, they can each have a unique address . The first GDP will have the address .003, the second .004, etc.

Click OK on the previous two menus to activate the settings.

To verify the settings are loaded, click Details:

You are now ready to Map a Network Drive to the GDP. Proceed to that section.

Suggestion: If you are connecting directly to a computer, you must use a crossover network cable. If you are connecting to a LAN through a network switch, you can probably use the same crossover cable, though it may cause connection problems.

Connecting the GDP to a LAN -

With the GDP connected to a Local Area Network that has a DHCP server, the GDP will be able to obtain its IP settings automatically. This is especially convenient because any computer on the network will be able to map a drive to the GDP and access it. You can also have any number of GDPs connected at the same time.

First connect the GDP to a port on the network switch.

From the first network screen, press

to select the option to connect using Automatic Settings.

Then press

to activate the connection.

SELECT DN

End

Enter

CONTINUE

If the GDP successfully obtains an IP address from the DHCP server, this screen will show its settings.

Use this IP address for any Ping testing you may need to do.

Also shown is the name to use to connect to the GDP using a mapped network drive.

You are now ready to Map a Network Drive to the GDP.

Note that you cannot access the GDP c: drive directly using Windows Explorer. It is required that a Mapped Drive letter is used.

Mapping a Network Drive to the GDP-

To access the flash disk of a GDP, its drive must be mapped to a local drive letter using the Windows Map Network Drive feature.

Start Windows Explorer : (Holding down the Windows key while pressing E is a shortcut)

Click on Map network drive.

Type in the GDP name as shown. Replace the 87 shown here with the serial number of the front panel on your GDP.

“Reconnect at logon” should not be checked

Click Finish. In this case, the GDP c: drive will be mapped to local drive z:. A view of the GDP files and folders may open automatically, or you may have to double-click on the Z: drive in Windows Explorer.

Troubleshooting Problems with Networking-

GDP program files, antenna calibrate files, board calibrate files, and un-archived data caches and utility programs are on the root of the GDP drive.

Archived data caches are stored in the DATA folder.

Here are some steps to follow if the network connection cannot be established:

• Verify that you are using a crossover cable.

• Verify that the computer indicates that a cable is connected. This would be indicated in the Network and Sharing Center, or by the network icon in the lower right of the screen. There should also be lights blinking indicating there is a network connection.

• Verify the computer has the correct IP address:

Type CMD in the search window and press Enter.

If these numbers are not correct, wait another two minutes and try again. If it is still incorrect, retry the setup procedure. Otherwise more detailed troubleshooting will be required.

Note that if the computer is connected to a network and has an automatic IP address, these numbers must be what was assigned by the DHCP server. The GDP must be connected to the same network and its IP address must match the first three sets of numbers, but be different for the last number.

• Try to “ping” the GDP.

Type ipconfig on the command line:

If the IP settings are correct, but the Ping doesn’t reply, then the problem is most likely with the GDP IP configuration. Verify it by checking the settings on the GDP.

• Check the IP configuration of the GDP.

Type “ping 192.168.1.3” on the command line:

If the GDP has an automatic IP address, these numbers will need to be obtained from the GDP itself using ipconfig described next.

If the IP settings of the GDP are correct, the problem may be with the connection inside the GDP.

• Lift up the front panel of the GDP.

• See if the LEDs on the front of the BD387 indicate network activity.

If the NET0 and NET1 lights are not active, check the network connection inside the GDP.

From the main menu of the GDP, press F8 (DOS). Then type ipconfig:

Verify that the IP Address and the Subnet Mask are correctly reported.

If it is an automatic IP address, these numbers should be compatible with the rest of the network.

Note that you will not be able to ping from the GDP to the Computer due to security settings.

PowerPoint Presentationsw-gdp.zonge.us/GDP3224 Field Manual v1_3.pdfThe GDP3224 has many...

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