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follows:
VHF 3 COMMUNICATIONS SYSTEM (IF INSTALLED)
An optional VHF 3 is located in the forward fuselage avionics bay and is used
primarily as a data radio. It does not have an attached transponder but has the
capability of operating in the data mode as well as the voice mode.
The RMU automatically senses when the optional third VHF COM radio is installed,
and adds a menu selection to the MENU page. Control of frequency and operating
mode is performed by the RMU and FMS CDU. VHF COM 3 works in conjunction
with the Data Link System as the data radio. The communication transceiver tuning
range is as follows:
SYSTEM FREQUENCY RANGE CHANNEL SPACING
VHF 1 and 2 118.00 to 151.975 MHz 25 kHz (760 channels)
SYSTEM FREQUENCY RANGE CHANNEL SPACING
VHF 3 118.00 to 151.975 MHz 25 kHz
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-8 For Training Purposes Only
Sept 04
INTEGRATED RADIO SYSTEM
The radio communications unit provides VHF communication (VHF COM) and
Mode S Transponder data link capabilities. It interfaces with the FMS, SELCAL,
TCAS, HF, audio control panels, and is controllable from either RMU.
Integrated Radio System Schematic
GX_05_010
VHF NAVIGATION UNIT 1,2
VOR/LOC, GS, DME, MKR
BCN, ADF ANTENNAS
TRANSPONDER
ANTENNAS
VHF 1, 2 (Optional) 3
ANTENNAS
VHF COMMUNICATION
DIGITAL AUDIO UNIT 1, 2 (Optional) 3
EMERGENCY TUNING
EMERGENCY
AUDIO/VOICE
AUDIO
AUDIO
TRAFFIC
COLLISION
AVOIDANCE
SYSTEM
FLIGHT
MANAGEMENT
SYSTEM
SELECTIVE
CALLING
SYSTEM
HF
COMMUNICATION
SYSTEM
AUDIO
INTEGRATED
UNIT 1,2,3
RADIO
MANAGEMENT
UNIT 1,2,3
AUDIO
VOICE VOICE
REMOTE TUNING
MARKER
MICROPHONES SENSITIVITY
MICROPHONES
LOUDSPEAKERS
HEADPHONES
For Training Purposes Only
Sept 04
5-9
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
RADIO MANAGEMENT UNIT (RMU) DISPLAY
The following is a description of the panel controls and information available on the
RMU.
TUNE
SQ
ID
DIM
PGE
1/2
TST
STO
DME
COM 1 NAV 1
TCAS DSPY 1
ATC-TCAS
HF 1
ADF 1
RANGE: 6 2000
2000
UV
STANDBY ANT
MEMORY-1 TEMP-1
NORMAL
118.00
131.27
1605
131.10
112.00
620.0
GX_05_011
Line Select
Keys
Function Keys
Tuning
Knobs
Cursor
Box Transfer
Key
Photo
Sensor
Main Tuning Page
COM 1 NAV 1
TCAS DSPY 1
ATC-TCAS
HF 1
ADF 1
RANGE: 6 15423
15600
LV
STANDBY ADF
MEMORY-4 MEMORY-1
NORMAL
121.82
118.02
1200
117.45
110.00
1799.5
COM 2 NAV 2
TCAS DSPY 2
ATC-TCAS
HF 2
ADF 2
RANGE: 6 15423
15600
LV
STANDBY ADF
MEMORY-4 MEMORY-1
NORMAL
121.82
118.02
1200
117.45
110.00
1799.5
PILOT’S
WINDOW
Contains the
following:
COPILOT’S
WINDOW
Contains the
following:
– COM 1
NAV 1
ATC/TCAS
ADF 1
TCAS DSPY 1
HF 1
–
–
–
–
–
COM 2
NAV 2
ATC/TCAS
ADF 2
TCAS DSPY 2
HF 2
–
–
–
–
–
–
RMU 1 (Pilot’s) RMU 2 (Copilot’s)
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-10 For Training Purposes Only
Sept 04
RADIO MANAGEMENT SYSTEM
The RMU is mounted in the center pedestal. It is a color Liquid Crystal Display
(LCD)-based radio tuning controller that provides centralized control and display of
frequencies, channels, codes and modes set on the communications and navigation
receivers. Each RMU provides single point control of both the on-side and cross-side
radios. The RMUs provide on-side and cross-side access to the following radios:
The RMU uses the concept of selecting a function by pushing a line select key next to
the parameter that you wish to control. Any selectable parameter may be changed by
pressing the corresponding line key next to the displayed parameter and then rotating
the concentric tuning knobs to set the desired value.
The RMU display is divided into dedicated windows. Each window groups the data
associated with a particular function of the radio system. The windows COM, NAV,
ATC, HF, ADF, and TCAS each provide for complete control of frequency and
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