Table of Contents - SmartCockpitVHF Communication System Description The VHF communication system...

Table of Contents

For Training Purposes OnlyJan 04

6-i

COMMUNICATIONSP I L O T T R A I N I N G G U I D E

Introduction .........................................................................................................................6-1

Audio Integrating System....................................................................................................6-2Description ....................................................................................................................6-2Components and Operation ..........................................................................................6-2

Flight Crew Jack Panels..........................................................................................6-2Ground Crew Interphone-Jack Units.......................................................................6-2Speakers .................................................................................................................6-2

Controls and Indicators .................................................................................................6-3

VHF Communication System..............................................................................................6-5Description ....................................................................................................................6-5Components and Operation ..........................................................................................6-5

Transceivers............................................................................................................6-5Antennas .................................................................................................................6-5Integrated Avionics Processor System ...................................................................6-5


HF Communication System ................................................................................................6-8Description ....................................................................................................................6-8Components and Operation ..........................................................................................6-8

Transceivers............................................................................................................6-8Antenna Coupler .....................................................................................................6-9Antenna...................................................................................................................6-9Selective Calling (SELCAL) ....................................................................................6-9


Radio Tuning System........................................................................................................6-11Description ..................................................................................................................6-11Components and Operation ........................................................................................6-11Controls and Indicators ...............................................................................................6-11

Radio Tuning Unit (RTU).......................................................................................6-11Reversionary/Inhibit Panel ....................................................................................6-13

Operation ....................................................................................................................6-14Display Hierarchy ..................................................................................................6-14RTU Failure Indications.........................................................................................6-19Self-Test................................................................................................................6-19Overtemperature ...................................................................................................6-20Readout.................................................................................................................6-20

Cockpit Voice Recorder System .......................................................................................6-21Description ..................................................................................................................6-21

Recorder ...............................................................................................................6-21CVR Control Unit...................................................................................................6-23Microphone ...........................................................................................................6-23

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6-ii For Training Purposes OnlyJan 04

P I L O T T R A I N I N G G U I D E

Controls and Indicators ............................................................................................... 6-23Operation .................................................................................................................... 6-24

Test ....................................................................................................................... 6-24Erase..................................................................................................................... 6-24

Flight Data Recorder System............................................................................................ 6-25Description .................................................................................................................. 6-25Components and Operation........................................................................................ 6-25

Recorder ............................................................................................................... 6-25Controls and Indicators ............................................................................................... 6-27

FDR EVENT Switch .............................................................................................. 6-27EICAS Messages........................................................................................................ 6-27

Static Dischargers............................................................................................................. 6-28Description .................................................................................................................. 6-28

List of FiguresGraphic Title Figure

For Training Purposes OnlyMay 03

6-iii

COMMUNICATIONSP I L O T T R A I N I N G G U I D E

Audio Integrating System Components ..............................................................................6-1Audio Control Panel ............................................................................................................6-2VHF Communication System - Block Diagram ...................................................................6-3HF Communication System - Block Diagram......................................................................6-4Radio Tuning Unit ...............................................................................................................6-5Reversionary/Inhibit Panel ..................................................................................................6-6COM/NAV Selections..........................................................................................................6-7COM 3 Selections ...............................................................................................................6-8ADF, ATC and TCAS Selections ........................................................................................6-9HF Selections....................................................................................................................6-10RTU and COM/NAV Failure Indications............................................................................6-11RTU TEMP Annunciation..................................................................................................6-12CVR System .....................................................................................................................6-13Cockpit Voice Recorder Panel ..........................................................................................6-14Flight Data Recorder System............................................................................................6-15Static Dischargers Location ..............................................................................................6-16

6-iv For Training Purposes OnlyMay 03

COMMUNICATIONS P I L O T T R A I N I N G G U I D E

Page Intentionally Left Blank

COMMUNICATIONS


6-1


CHAPTER 6: COMMUNICATIONS

IntroductionCommunications is a function of the Challenger 604 fully integrated avionics system and includes the following:

• Audio Integrating System• VHF Communication System• HF Communication System• Radio Tuning System• Cockpit Voice Recorder (CVR) System• Flight Data Recorder (FDR) System• Static Dischargers

COMMUNICATIONS

6-2 For Training Purposes OnlyJan 04


Audio Integrating System

DescriptionThe audio integrating system provides an interface between crew microphones, speakers, headphones, and the aircraft’s radio, warning and recording systems. The audio integrating system also provides an interface between any or all flight crew and ground crew stations.

Components and OperationThe audio integrating system consists of the following components:

• two flight crew jack panels• three ground crew interphone units (jacks)• two speakers• two audio control panels

Flight Crew Jack Panels

Two flight crew jack panels (Pilot and Copilot) are located in the flight compartment.

Ground Crew Interphone-Jack Units

The three ground crew interphone-jack units are installed in the following locations:

• nosewheel well• main avionics bay• aft equipment compartment

Each assembly is a metal-case sealed unit which has one microphone jack and one headphone jack. The microphone jacks in the nosewheel well and aft compartment are deactivated in flight by the WOW switch.

Speakers

Two independent speakers are mounted in the roof of the flight compartment for the pilot’s and copilot’s audio systems. The speakers allow audio monitoring without the use of headphones.

COMMUNICATIONS


6-3


Controls and IndicatorsThe audio control panels provide controls for selecting and controlling receiver audio from the COM/NAV systems, and controls for connecting the microphone audio and keying to the HF/VHF systems.

Audio Integrating System Components Figure 6-1

HDPH

1 - VHF - 2

1 - DME - 2

1 - NAV - 2 1 - MKR - 2

1 - ADF - 2

R/T

I/C

VOICE

BOTH

SPKR MASK

BOOM

EMER

NORM

PA

INT/SVCVHF 3 1 - HF - 2

Aft EquipmentBay

AvionicsBay

NosewheelWell

INTERPHONEUNIT

Pilot PTTSwitch

JACK PANEL JACK PANEL

AUDIO CONTROL PANEL

Speaker Speaker

P6

04

_0

6_

00

1

HDPH MIC MIC

I/COFF

R/T

NOSE D

N

NOSE UP

AP

SC

SYNC I/C

OFFR/T

NO

SEDN

NOSE

UP

AP

SC

SYNC

Copilot PTTSwitch

MICHDPH

COMMUNICATIONS

6-4 For Training Purposes OnlyMay 03


Audio Control Panel Figure 6-2

Public Address (PA)Flight deck to cabincommunication

1 - VHF - 2

1 - DME - 2

1 - NAV - 2 1 - MKR - 2

1 - ADF - 2

R/T

I/C

VOICE

BOTH

SPKR MASK

BOOM

EMER

NORM

PA

INT/SVCVHF 3 1 - HF - 2

MIC SelectorSwitch

Emergency/NormalSwitchNorm

Emer

- Services asselected

- RX/TX onVHF, audio on navand aural warningsboom and maskmicrophone

VHF 1/2/3 COMMAudio Controls

HF 1/2Audio Controls

ADF 1/2Audio Controls

Marker BeaconAudio Controls

Radio Transmit (R/T)Intercom (I/C) Switch

R/T

I/C

(Center Off -Momentary at R/T)

- used for boom ormask mic

- hot mic for boomor mask throughintercom system

VOICE / BOTHSwitchVOICE

BOTH

- voiceinformation only

- voice and cwident

Flight CompartmentSpeaker (SPKR)Audio Control

Mask/Boom Mic SwitchMaskBoom

- oxygen mask- boom microphone

DME 1/2Audio Controls

NAV 1/2Audio Controls

Intercom/ServicesAudio Control

P6

04

_0

6_

00

2

For AllAudio Controls:Push ONPush OFFBacklit when ONRotate for volume

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6-5


VHF Communication System

DescriptionThe VHF communication system consists of two very high frequency (VHF) transceivers (VHF 1 and VHF 2) which operate independently. The VHF transceivers provide amplitude modulated (AM) short-range voice communications in the frequency range of 118.00 to 151.975 MHz, selectable in increments of 25 KHz/8.33 KHz.

Components and OperationThe VHF communication system consists of the following components:

• two transceivers• two antennas

Associated components:

• two radio tuning units (RTUs)• two audio control panels• one reversionary / inhibit panel• integrated avionics processor system (IAPS)

Transceivers

Two VHF-422B transceivers contain the circuits required for transmission and reception of radio signals, and processing of audio signals.

Antennas

There are two VHF antennas located as follows:

• VHF 1 antenna - upper side of the fuselage• VHF 2 antenna - underside of the fuselage

Integrated Avionics Processor System

The integrated avionics processor system (IAPS) is a card cage assembly that physically houses some avionic line replaceable units (LRUs). The IAPS reads several avionic buses and distributes data to those LRUs requiring the information. Most avionics data is processed by this unit.

COMMUNICATIONS



VHF Communication System - Block Diagram Figure 6-3

AUDIO SYSTEM

VHF COMMNO. 1XCVR

VHF COMMNO. 2XCVR

IAPS

FMS FMS

DCBATT

DCBUS 2

A

C

C

A

BB

VHF 1ANTENNA

118.00 - 151.975 MHz

VHF 2ANTENNA

118.00 - 151.975 MHzPILOT'S RTU

REVERSIONARY /INHIBIT PANEL

COPILOT'S RTU

VHF 1ONLY

P6

04

_0

6_

00

3

INHIBIT PUSH

1-RTU-2 FMS TUNE

1 2

AFCSSEL

STBY

1 2

ATCSEL

FMSTUNEINHIB

RTU 1INHIB

RTU 2INHIB

1 21 2

IDENT

DME-H

1/2

BRT

BRT

116.30ACT PRE

111.35NAV1

ACT PRE

121.90 149.10COM1

373.0ADF 1 TCAS

TA

ATC1NEXTPAGE 5540

TONEREL

IDENT

DME-H

1/2

BRT

BRT

116.30ACT PRE

111.35NAV1

ACT PRE

121.90 149.10COM2

373.0ADF 1 TCAS

TA

ATC1NEXTPAGE 5540

TONEREL

COMMUNICATIONS


6-7


Controls and IndicatorsThe VHF communication system controls and indicators are described in the following sections of this chapter:

• Audio control panel is described in the Audio Integrating System• RTU and reversionary / inhibit panel are described in Radio Tuning System

The VHF transceiver is normally tuned by the on-side RTU. The VHF transceiver may also be tuned by the cross-side RTU or by the FMS. The VHF transceiver supplies an audio output to the audio system and a digital bus output to the IAPS. The data output contains the communication frequency which is echoed back to the RTUs.

COMMUNICATIONS



HF Communication System

DescriptionThe HF communication system consists of two high-frequency (HF) transceivers (HF 1 and HF 2) which operate independently.

Communication range on HF frequencies is longer (potentially global), but less reliable than on conventional VHF and UHF frequencies, and varies substantially with factors such as operating frequency, season, time of day, atmospheric noise, and solar activity.

Components and OperationThe HF communication system consists of the following components:

• two transceivers• two couplers• one antenna

Associated components:

• two radio tuning units (RTUs)• two audio control panels• one reversionary / inhibit panel• one SELCAL decoder• Integrated Avionics Processor System (IAPS)

Transceivers

The transceivers provide signal processing for transmission and reception. The unit consists of a control module, RF/IF module, frequency synthesizer, frequency standard, power supply/audio module and a power amplifier.

The transceivers provide amplitude modulated (AM) and single sideband (SSB) long-range voice communications in the frequency range of 2 to 30 MHz, selectable in increments of 100 Hz. Limited preset channel selection is also available and a SELCAL (selective calling) feature is incorporated.

The two HF transceivers are identical and independent. They may be operated simultaneously in receive mode but only one transceiver at a time can operate in transmit mode. In a dual HF system configuration, antenna coupler No. 1 and antenna coupler No. 2 exchange status (interlock) data to ensure that only one transceiver is connected to the antenna for the transmit mode. When one transceiver is keyed to transmit, the other transceiver is disconnected from the antenna and is unable to receive or transmit. Frequency and mode selection is covered in the RTU section.

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6-9


Antenna Coupler

The antenna coupler matches the impedance of the transceivers to the antenna as different frequencies are selected and keyed.

Antenna

The antenna is an integral part of the leading edge of the vertical stabilizer. The antenna is connected to the antenna coupler units via an RF strap.

High voltages and currents are present in this area during transmissions.

Selective Calling (SELCAL)

Both HF transceivers are coupled to a SELCAL system, which monitors the selected HF frequencies for the airplane’s unique SELCAL code without requiring the crew to continuously monitor the HF audio. If the code is detected, an EICAS message and an audio alert are triggered to advise the flight crew that a ground station is calling. The EICAS message is reset when the appropriate HF transceiver is keyed to transmit.

Controls and IndicatorsThe HF communication system controls and indicators are described in the following sections of this chapter:

• Audio control panel is described in Audio Integrating System• RTU and reversionary / inhibit panel are described in Radio Tuning System

CAUTION

COMMUNICATIONS



HF Communication System - Block Diagram Figure 6-4

AUDIO SYSTEM

SELCAL

IAPS

ANTENNACOUPLER

#1

ANTENNACOUPLER

#2

A

B

A

B

HF COMMNO.1XCVR

HF COMMNO.2XCVR

COPILOT'S RTU

REVERSIONARY /INHIBIT PANEL

DCUTILITY

BUS 2

DCUTILITY

BUS 2

PILOT'S RTU

P6

04

_0

6_

00

4

DCBUS 1

DCBUS 1

INHIBIT PUSH

1-RTU-2 FMS TUNE

1 2

AFCSSEL

STBY

1 2

ATCSEL

FMSTUNEINHIB

RTU 1INHIB

RTU 2INHIB

1 21 2

IDENT

DME-H

1/2

BRT

BRT

116.30ACT PRE

111.35NAV1

ACT PRE

121.90 149.10COM1

373.0ADF 1 TCAS

TA

ATC1NEXTPAGE 5540

TONEREL

IDENT

DME-H

1/2

BRT

BRT

116.30ACT PRE

111.35NAV1

ACT PRE

121.90 149.10COM2

373.0ADF 1 TCAS

TA

ATC1NEXTPAGE 5540

TONEREL

COMMUNICATIONS


6-11


Radio Tuning System

DescriptionThe radio tuning system provides integrated control of airplane communication and navigation radio subsystems. It supports full cross-side and reversionary tuning, thus allowing single-point control of both on-side and cross-side radios from the pilot or copilot positions.

Components and OperationThe radio tuning system consists of the following components:

• two radio tuning units (RTUs)• one reversionary / inhibit panel

For the Flight Management System (FMS) tuning of communications, refer to Chapter 17 Navigation Systems under the heading “TUNE PAGE” in the FMS section.

Controls and Indicators

Radio Tuning Unit (RTU)

Line Select KeysThe RTU has eight panel-mounted line select keys adjacent to the display, four on the left and four on the right of the display. Each key has a mechanical, momentary, nonlatching action. The functions performed by these keys vary with each display presented.

Dedicated Pushbuttons (IDENT, DME-H and 1/2)There are three dedicated function pushbuttons on the RTU. These pushbuttons have mechanical, momentary, nonlatching actions, but may have latched functions implemented by system software.

Tune Knob ClusterTwo concentric knobs are used to tune frequencies (or select codes) for the RTU — both knobs are rate-aided. The functions controlled by the tuning/code knobs include:

• active frequency/code• preset frequency/code• numbered preset channels in the preset field only• HF COM squelch/emission mode values

COMMUNICATIONS



The function to be tuned is selected using the line select keys. A tuning window is displayed around the frequency/code to be tuned to confirm the selection.

Tuning WindowThe tuning window is displayed as a rectangle around the frequency/code to be tuned or modified. The default position for the tuning window on the primary top level display is the VHF COM preset frequency.

When no activity is detected from the line select keys or tuning/code knobs for 20 seconds, the display page reverts to the primary top level display and the tuning window is placed at the default position.

Radio Tuning Unit Figure 6-5

NOTE

IDENT

DME-H

1/2

BRT

BRT

116.30ACT PRE

111.35NAV1

ACT PRE

121.90 149.10COM1

373.0ADF 1 TCAS

TA

ATC1NEXTPAGE 5540

STBY

TONEREL

Tuning KnobsConcentric knobs to selectfrequencies or codes

Brightness (BRT) ControlControls brightness ofdisplays

Line Select KeysThese keys canfunction as:- frequency

selector- mode selector- function selector- line selector

depending on thedisplay

- page selector

Active Frequency ReadoutIndicates frequency set atCOM radio (active)

Preset or Recall Frequency ReadoutPre

Recall

- frequency was changed by tuningknobs; i.e. preset

- frequency was swapped withactive frequency

ATC Identification(IDENT)PushbuttonPushed at ATCcontroller request,causes an additionalidentification patternon ATC groundradar screen

DME-HOLD(DME-H)PushbuttonWhen pushed,holds DME atcurrent frequencyand allowsnavigation receiverto be independentlyretuned

Left Side / Right Side(1/2) PushbuttonPush to select left side (1)or right side (2) radios, fortuning. Arrows indicateside selected

P6

04

_0

6_

00

5

COMMUNICATIONS

For Training Purposes OnlyJan 04

6-13


Active and Preset Frequencies/CodesThe preset frequency/code appears on the right side of the subdisplay. If the preset frequency/code has been tuned or otherwise modified, a PRE annunciator is displayed above it. If the active and preset frequencies/codes are swapped, a RECALL annunciator appears above the preset frequency/code. Additionally, if the tuning window surrounds the preset frequency/code, an arrow appears to the right of the PRE or RECALL annunciator to indicate that the next press of the associated line select key will cause the active and preset frequency/code to swap.

Reversionary/Inhibit Panel

The reversionary/inhibit panel allows selective deactivation of either or both RTUs, and/or inhibits the FMS from tuning the COM/NAV systems.

Reversionary/Inhibit Panel Figure 6-6

RTU 1 (2) INHIBIT Switch/LightsRTU 1

RTU 2

- when pressed in (latched), light comes on,disables RTU 1 and enables direct cross-sidetuning of off-side radios (RTU 2 controlling COM 1,NAV 1, etc.)

- when pressed in (latched), light comes on,disables RTU 2 and enables cross-side tuning ofoff-side radios (RTU 1 controlling COM 2, NAV 2).

FMS TUNE INHIB Switch/LightWhen pressed in (latched), light comeson and prevents RTUs from beingtuned by either FMS.

P6

04

_0

6_

00

6

INHIBIT PUSH

1-RTU-2 FMS TUNE

1 2

AFCSSEL

STBY

1 2

ATCSEL

FMSTUNEINHIB

RTU 1INHIB

RTU 2INHIB

1 21 2

COMMUNICATIONS



OperationThe operation of the RTU is presented in a sequence that shows the top page followed by the hierarchy of the selected system.

Display Hierarchy

The RTU display is two-level tiered for the VHF COM/NAV, ADF, ATC and TCAS systems as follows:

• primary top level display• main display page

The RTU display is three-level tiered for the auxiliary VHF COM (3) transceiver as follows:

• primary top level display• secondary top level display• auxiliary VHF COM main

The RTU display is four-level tiered for the HF COM system as follows:

• primary top level display• secondary top level display• HF COM main• number preset pages

COMMUNICATIONS

For Training Purposes OnlySept 04

6-15


.

COM/NAV Selections Figure 6-7

IDENT

DME-H

1/2

BRT

BRT

108.50ACT PRE

109.00NAV1

ACT PRE

123.45 134.92COM1

195.5ADF1 TCAS

TA

ATC1NEXTPAGE 4567

TONEREL

25 SEL

IDENT

DME-H

1/2

BRT

BRT

ACT PRE

108.50 149.10NAV1

MKR

RETURN

TONE

SENS

DME

108.50

HILO

IDENT

DME-H

1/2

BRT

BRT

ONSQUELCH

ACT PRE

123.45 134.92COM1

RETURN

TONE

OFFKNOB SEL8.33 25

PRIMARY TOP LEVEL DISPLAYFREQ Change Swap KeyTUNE

SWAP

- tune window in view,use tuning knob. Tunewindow not in view, pushkey, then use tuning knobs.PRE label comes ON.

- push key tointerchange preset andactive frequencies. RECALLlabel comes ON.

COM SourceAnnunciator

NAV Main PageUsed to selectnavigation frequencies

DME Frequency ReadoutIndicates frequency ofDME receiver

MKR SENS ReadoutUsed to adjust markerbeacon sensitivity

Frequency ReadoutIndicates active NAVfrequency

COM PAGE

NAV PAGE

P6

04

_0

6_

00

7

Line Select KeyToggles between 8.33 /25 kHz modes of operation

COMMUNICATIONS



COM 3 Selections Figure 6-8

IDENT

DME-H

1/2

BRT

BRT

ONSQUELCH

ACT PRE

123.45 134.92COM1

RETURN

TONE

OFFKNOB SEL8.33 25

IDENT

DME-H

1/2

BRT

BRT

108.50ACT PRE

109.00NAV1

ACT PRE

123.45 134.92COM1

195.5ADF1 TCAS

TA

ATC1NEXTPAGE 4567

TONEREL

IDENT

DME-H

1/2

BRT

BRT

123.45ACT PRE

134.92COM3

ACT PRE

19.4560 8.0040HF1

TONE

UV

SQ0

23.4687

RETURN

Return KeyWhen pushed, returnsto top level page. Allchanges carriedforward.

PRIMARY TOP LEVEL DISPLAY

AUX COMPreset Display

Frequency ReadoutIndicates active VHFfrequency

Squelch Readout

Squelch Key

FREQ Change Swap KeyTUNE

SWAP

- tune window inview, use tuning knob. Tunewindow not in view, pushkey, then use tuning knobs.PRE label comes ON.

- push key tointerchange preset andactive frequencies. RECALLlabel comes on.

SECONDARY PAGE

COM 3 PAGE

P6

04

_0

6_

00

8

AUX COM Display

25 SEL

COMMUNICATIONS


6-17


ADF, ATC and TCAS Selections Figure 6-9

IDENT

DME-H

1/2

BRT

BRT

108.50ACT PRE

109.00NAV1

ACT PRE

123.45 134.92COM1

195.5ADF1 TCAS

TA

ATC1NEXTPAGE 4567

TONEREL

IDENT

DME-H

1/2

BRT

BRT

RELALT

MODETCAS

RETURN

TONE

ABS

TEST

BELOW

NORM

TRAFFICAUTO STBY

TA ONLYONOFF

ABOVE

IDENT

DME-H

1/2

BRT

BRT

ALT

4567ATC

RETURN

TONE

ON OFF410

STBY

IDENT

DME-H

1/2

BRT

BRT

MODE

238.0ADF1

RETURN

TONE

TONE

TEST

ONOFF

ADF ANT


MODE Key

ANT

ADF

Selects either ADF orANTENNA functions:

- used for rangenavigation, optimumstation tuning, ormonitoring commercialbroadcast

- selects directionalantenna which seekssignal source

TONE Key Switch

ON

OFF

Selects tone circuiteither ON or OFF.

- superimposes anaural signal onunmodulated carrierwaves to aid in precisefrequency selection.

- shuts off auralsignal.

ADF PAGE

TEST Line Key

ATC PAGE

TCAS PAGE

ATC CodeDisplay

ALTAnnunciator

ALT Mode Key

ON

OFF

Selects altitude readout- reported altitude is

displayed- reported altitude

goes out

Tune WindowATC Main PageSelects ATC modes andfrequencies

RETURN Line Key

Mode Of OperationReadout

ATC 1/2STBY

Indicates active mode ofoperation

ATC IDENTIFICATION (ID)PushbuttonPushed at ATC controllerrequest, causes an additionalidentification pattern on ATCground radar screen

Altitude Display

TCAS MODE Select Key

AUTO

STBYTA ONLY

Selects TCAS modes ofoperation

- displays TA/RAautomatically (above900 ft) or RA only (below900 ft)

- STANDBY mode- only traffic

advisories are displayed

Altitude Tag Key

REL

ABS

Selects altitude readouttype on MFD traffic symbols

- relative to ownaircraft altitude

- absolute with respectto barometric altitude

Traffic Display Select Key

ON

OFF

Selects display mode:displays all transponder

equipped trafficdisplays threat traffic only

–

–

Altitude Range Select Key

BELOW

Selects range values:

– -9900 ft to +2700 ft.NORM – -2700 ft to + 2700 ft.ABOVE – -2700 ft to + 9900 ft.

TCAS Test KeyInitiates TCAS self-test on the ground only

ADF Main PageSelects ADF modes andfrequencies

P6

04

_0

6_

00

9

COMMUNICATIONS



HF Selections Figure 6-10

IDENT

DME-H

1/2

BRT

BRT

ACT PRE

22.3576 8.0040HF1

UV

SQ3

RETURN

TUNEEMER FREQ

PRESET ITU

LOPOWER

MED HI

PRESETPAGE

TEST

SIMPLEXDUPLEX

IDENT

DME-H

1/2

BRT

BRT

14

8.0040

ACT

23.4687 8.0040HF1

UV

SQ3

23.1040RT

RETURN

26.9436AM

26.943622.1040

LV15

16RT

NEXTPAGE

LV

13

IDENT

DME-H

1/2

BRT

BRT

123.45ACT PRE

134.92COM3

ACT PRE

19.4560HF1

TONE

UV

SQ0

RETURN

IDENT

DME-H

1/2

BRT

BRT

108.50ACT PRE

109.00NAV1

ACT PRE

123.45 134.92COM1

195.5ADF1 TCAS

AUTO REL

ATCNEXTPAGE 4567

STBY

TONE


HF Display HF PresetDisplay

HF Main PageUsed to select HFfrequencies and modes

FREQ KeyPush once to directly tuneHF with tuning knobs

MODE KEYS

SQUVLVAM

SIMPLEX

DUPLEX

PRESET PAGE

EMER FREQ

PRESET ITU

POWER

TEST

Push key adjacent todesired mode:

- COM squelch- upper sideband voice- lower sideband voice- amplitude

modulation- RX and TX

modes paired- RX and TX

modes separated-

company frequencies- 6 channel

preset select- selects

maritime channels- selects power

level- initiates test

function

Frequency Select KnobsOuter knob is cursor controlmoving cursor box within tunewindow.Inner knob changes digitswithin cursor box

HF Active Display

NEXT PAGE Line KeyAllows selection ofpreset channels 1-16

Preset Page Number

Preset Page Line Keys (4)

Simplex Frequency Display

Preset Operating Mode(AM/LV/UV)

Duplex ReceiveFrequency Display

Duplex TransmitFrequency Display

HF PRESET PAGE

P6

04

_0

6_

01

0

UP Select KeyScrolls through HFpages.

Freq Change/Swap KeysPushed, moves tune windowto ____ line (default position).Tuning knobs used to changefrequency. Pushed again,swaps active and presetfrequencies.

SIMPLEXDUPLEX

UV

UV

8.0040

HF1

UV 23.1040RT UV

COMMUNICATIONS


6-19


RTU Failure Indications

RTU and COM/NAV Failure Indications Figure 6-11

Self-Test

On power-up, the RTU performs a self-test. Should the RTU fail the self-test, the screen will go blank and an RTU FAILURE annunciator will appear in the center of the screen.

IDENT

DME-H

1/2

BRT

BRT

ACT PRE

108.15NAV1

ACT PRE

134.92COM1

ADF 1 TCAS

ATC

FAIL

TONE

DME - -

IDENT

DME-H

1/2

BRT

BRT

RTU FAILURE

RTU FailureMessage (red)Comes on in centerof CRT. RTU detectsinternal failure duringself-test

P6

04

_0

6_

011

COMMUNICATIONS



Overtemperature

The internal temperature is constantly monitored. If the temperature exceeds the internal threshold, the RTU TEMP annunciator is displayed.

Readout

When a value is selected, it is not displayed on the RTU unless it has been accepted by the addressed system or unit and returned to the RTU. If the echoed data does not match the new value selected within two seconds, the displayed data is replaced by dashes indicating that the selection has failed.

RTU TEMP Annunciation Figure 6-12

IDENT

DME-H

1/2

BRT

BRT

108.50ACT PRE

109.00NAV1

ACT PRE

123.45 134.92COM1

195.5ADF 1 TCAS

AUTO REL

ATCNEXTPAGE 4567

STBY

TONE

RTUTEMP

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Cockpit Voice Recorder System

DescriptionThe cockpit voice recorder (CVR) system is a high-fidelity recorder which records the flight crew conversations, radio communications and flight compartment sounds on three separate channels. A fourth channel is used for synchronization with the flight data recorder (FDR). The system operates in conjunction with the audio integrating system. The CVR consists of the following components:

• one recorder• one CVR control unit• one microphone

Recorder

The recorder is designed to continuously acquire and store, in a solid-state memory, audio data for a minimum of 30 minutes. The solid-state memory has no moving parts to ensure maximum reliability.

COMMUNICATIONS



CVR System Figure 6-13

HEADSET

COCKPIT VOICERECORDER

ERASE

HOLD5 SEC

TEST

COCKPIT VOICE RECORDER PANEL

VOICE RECORDERMICROPHONE

VOICE RECORDER UNIT

UnderwaterLocating Device

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For Training Purposes OnlySept 04

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CVR Control Unit

The CVR control unit contains a meter, an ERASE and a TEST Pushbutton, and a headset monitor jack.

Microphone

The remote area microphone is mounted on the overhead panel behind a grille. The microphone picks up flight compartment conversations and sounds, and feeds them into the recorder.

Controls and IndicatorsFor controls and indicators, refer to the CVR control unit section.

Cockpit Voice Recorder Panel Figure 6-14

HEADSET

COCKPIT VOICERECORDER

ERASE

HOLD5 SEC

TEST

Test Pushbutton SwitchPress to test Voice Recorder System. A green lightwill illuminate. If headset is plugged into unit, a testtone will be heard.

Erase Pushbutton SwitchWhen pressed for at least two seconds, erases allrecorded information, provided the airplane has landedand the parking brake is set.

Headset Monitor JackWith headset plug in, allows monitoring of tonetransmission during test and audio signalsbeing recorded.

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OperationThe CVR constantly records when power is supplied to the system. The only way to preserve specific recorded information is to pull the CVR circuit breaker or otherwise shut down the system.

Test

Incorporated into the CVR is a built-in-test-equipment (BITE) utility program which provides a go/no-go indication.

The self-test is initiated by pressing the TEST Pushbutton on the CVR control unit. This causes a test tone to be applied to each channel individually. The test tone is processed, stored in memory and read from memory. The tone is then checked for expected frequency and amplitude.

Visual indication of the test is provided on the test meter. The test meter provides an indicator signal which is the go/no-go display.

The phone jack permits monitoring of the actual recorded audio as well as the tone bursts during test.

Erase

The ERASE Pushbutton will bulk-erase the entire memory, provided that the parking brake is set and the WOW interlocks are closed. The bulk-erase Pushbutton must be held for more than two seconds for the bulk-erase to take place.

COMMUNICATIONS


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Flight Data Recorder System

DescriptionThe flight data recorder (FDR) is a solid-state system that records airplane flight parameters for future retrieval and analysis.

The FDR puts a digital stream of data from the data concentrators into a solid-state memory module which has a capacity to retain 25 hours of data. When the memory module is full, the data is progressively overwritten by the most recent data being recorded.

Components and OperationThe FDR system consists of the following components:

• one recorder• one FDR EVENT switch

Recorder

The recorder solid-state memory has no moving parts. This ensures maximum reliability. Recorded data may also be retrieved (downloaded) for analysis purposes.

The FDR is automatically turned on when the right engine start switch is pushed. It then starts to record data from the data concentrator unit (DCU). This data is fed back to the originating DCU. If the DCU is unable to synchronize with the data returned from the FDR for longer than 8 seconds, the FDR FAIL status message will be displayed on the EICAS.

The FDR shuts down when power is removed from the system by pulling the FDR circuit breaker or by shutting down the aircraft.

COMMUNICATIONS



Flight Data Recorder System Figure 6-15

PASS SIGNS EMER LTS

NO SMKG SEAT BELTS

ONOFFARM

FDREVENT

ONOFFAUTO

ONOFFAUTO

OA A

UnderwaterLocatingDevice

FLIGHT DATARECORDER UNIT

FDR Event SwitchPush to mark a specificdate/time on flight datarecordings

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Controls and Indicators

FDR EVENT Switch

The FDR EVENT switch is located on the PASS SIGNS/EMER LTS/FDR EVENT panel. When pushed, the switch sends a signal to the data concentrators which place a marker in the recorder memory to facilitate data retrieval. An event marker can be added to the FDR any time the FDR is operating.

EICAS Messages

MESSAGE MEANING AURAL WARNING (IF ANY)

FDR EVENT Confirm the flight data recorder has set a marker in response to activation of the button on the control panel.

SELCAL HF 1/2A call for this aircraft has been detected on the respective high-frequency radio. Message will be canceled when that radio is keyed to reply.

“SELCAL”

FDR FAIL Indicates the flight data recorder is inoperative.

EICAS Messages Table 6-1

COMMUNICATIONS



Static Dischargers

DescriptionThe aircraft is equipped with a system of wicks on the aft-facing surfaces and horizontal stabilizer tips. Each wick consists of a base and a discharger. The 24 (26 as per SB 604-23-006) dischargers allow gradual bleed-off of static electrical charges from the airframe to prevent radio interference.

Static Dischargers Location Figure 6-16

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