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Vol. 2 06−10−12
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
COM/NAV Selections
Figure 06−10−7
COMMUNICATIONS
Description
Vol. 2 06−10−13
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
COM 3 Selections
Figure 06−10−8
COMMUNICATIONS
Description
Vol. 2 06−10−14
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
ADF, ATC and TCAS Selections
Figure 06−10−9
COMMUNICATIONS
Description
Vol. 2 06−10−15
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
HF Selections
Figure 06−10−10
COMMUNICATIONS
Description
Vol. 2 06−10−16
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
RTU Failure Indications
RTU and COM/NAV Failure Indications
Figure 06−10−11
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.
Overtemperature
The internal temperature is constantly monitored. If the temperature exceeds the internal
threshold, the RTU TEMP annunciator is displayed.
COMMUNICATIONS
Description
Vol. 2 06−10−17
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
RADIO TUNING SYSTEM (CONT'D)
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 06−10−12
COCKPIT VOICE RECORDER SYSTEM
Description
The 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
Description
Vol. 2 06−10−18
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
COCKPIT VOICE RECORDER SYSTEM (CONT'D)
CVR System
Figure 06−10−13
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.
COMMUNICATIONS
Description
Vol. 2 06−10−19
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
COCKPIT VOICE RECORDER SYSTEM (CONT'D)
Controls and Indicators
For controls and indicators, refer to the CVR control unit section.
Cockpit Voice Recorder Panel
Figure 06−10−14
Operation
The 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.
COMMUNICATIONS
Description
Vol. 2 06−10−20
REV 66, Feb 01/07
　
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