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COM1
195.5
ADF1 TCAS
AUTO REL
ATC
NEXT
PAGE 4567
STBY
TONE
PRIMARY TOP LEVEL DISPLAY
HF Display HF Preset
Display
HF Main Page
Used to select HF
frequencies and modes
FREQ Key
Push once to directly tune
HF with tuning knobs
MODE KEYS
SQ
UV
LV
AM
SIMPLEX
DUPLEX
PRESET PAGE
EMER FREQ
PRESET ITU
POWER
TEST
Push key adjacent to
desired 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 Knobs
Outer knob is cursor control
moving cursor box within tune
window.
Inner knob changes digits
within cursor box
HF Active Display
NEXT PAGE Line Key
Allows selection of
preset channels 1-16
Preset Page Number
Preset Page Line Keys (4)
Simplex Frequency Display
Preset Operating Mode
(AM/LV/UV)
Duplex Receive
Frequency Display
Duplex Transmit
Frequency Display
HF PRESET PAGE
P604_06_010
UP Select Key
Scrolls through HF
pages.
Freq Change/Swap Keys
Pushed, moves tune window
to ____ line (default position).
Tuning knobs used to change
frequency. Pushed again,
swaps active and preset
frequencies.
SIMPLEX
DUPLEX
UV
UV
8.0040
23.1040
RT
UV
COMMUNICATIONS
For Training Purposes Only
May 03
6-19
P I LOT T R A I N I N G GU I D E
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
108.15
NAV1
ACT PRE
134.92
COM1
ADF 1 TCAS
ATC
FAIL
TONE
DME - -
IDENT
DME-H
1/2
BRT
BRT
RTU FAILURE
RTU Failure
Message (red)
Comes on in center
of CRT. RTU detects
internal failure during
self-test
P604_06_011
COMMUNICATIONS
6-20 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
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
108.50
ACT PRE
109.00
NAV1
ACT PRE
123.45 134.92
COM1
195.5
ADF 1 TCAS
AUTO REL
ATC
NEXT
PAGE 4567
STBY
TONE
RTU
TEMP
P604_06_012
COMMUNICATIONS
For Training Purposes Only
May 03
6-21
P I LOT T R A I N I N G GU I D E
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
6-22 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
CVR System
Figure 6-13
HEADSET
COCKPIT VOICE
RECORDER
ERASE
HOLD
5 SEC
TEST
COCKPIT VOICE RECORDER PANEL
VOICE RECORDER
MICROPHONE
VOICE RECORDER UNIT
Underwater
Locating Device
P604_06_013
COMMUNICATIONS
　
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