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The indicators display these flags, if the :
‐ VOR receiver fails
‐ RMI has an internal failure
‐ Heading signal from ADIRS is not valid
‐ Power supply fails.
As long as the flag appears, the relevant pointer remains at the last valid position.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
RADIO NAV - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-30-30 P 2/4
FCOM 19 AUG 10
(4) DME 1(2) counters
The counters indicate distances in NM, and 1/10th at less than 20 nm.
At less than 1 nm, 0 is shown.
RADIO MANAGEMENT PANEL (RMP)
Applicable to: ALL
(1) ON/OFF sw
This switch controls the power supply to the panel.
(2) NAV key (transparent switchguard)
‐ Pressing this key engages the radio navigation backup mode. It takes control of the VOR,
ILS, MLS, and ADF �� receivers away from the FMGC and gives it to the RMP.
‐ The green monitor light comes on.
‐ Pressing the NAV key a second time returns control of the navigation radios to the FMGC.
Note: ‐ The flight crew must select this backup tuning mode on both RMP1 and RMP2 if
both FMGCs or both MCDUs fail. In the emergency electrical configuration, only
RMP1 receives power.
‐ Pressing the NAV key on RMP3 (if installed) has no effect.
‐ In the NAV backup mode, the flight crew can select radio communication
systems as it would in the normal mode.
Setting one RMP to NAV backup mode removes navaids tuning from both
FMGCs.
‐ When the flight crew uses an RMP to turn an ILS/DME, the PFDs do not display
the DME distance.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
RADIO NAV - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-30-30 P 3/4
FCOM 19 AUG 10
(3) STBY NAV keys
When the NAV key is on and the flight crew presses one of these STBY NAV keys, the ACTIVE
window displays the frequency to which that receiver is tuned. The green monitor light on the
selected key comes on, and the one on the previously selected STBY NAV or COM key goes
out.
(4) Frequency selector knob
Two concentric knobs allow the flight crew to preselect frequencies for communication radios
and stand-by navigation systems and select courses for VOR and ILS.
The desired frequency or course is set in the STBY/CRS window.
‐ setting frequency :
The outer knob controls the most significant digits, the inner knob controls the least
significant digits. A rate multiplier speeds up the tuning when the knob is rotated rapidly.
‐ setting course :
Selected by inner knob only.
(5) Transfer key
The flight crew presses this key to interchange ACTIVE and STBY frequencies. This action
tunes the selected receiver to the new ACTIVE frequency.
(6) STBY/CRS window
The flight crew can make the frequency displayed in this window become the active frequency
by pressing the transfer key, or change it by rotating the tuning knob.
If this window displays a course, then the ACTIVE window displays the associated frequency.
Note: If the STBY/CRS window is displaying a course, then pressing the transfer key
displays the active frequency in both windows.
(7) ACTIVE window
This window displays the frequency of the selected navaid, which is identified by a green
monitor light on the selection key.
(8) BFO key
Pressing this key activates the BFO (Beat Frequency Oscillator), if the ADF receiver is
selected.
The green monitor light comes on.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
RADIO NAV - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-34-30-30 P 4/4
FCOM 19 AUG 10
For most ADF, with BFO activated, the audio identification is heard. However there are some
ADF where the BFO must be deactivated in order to hear the audio identification.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
RADIO NAV - ELECTRICAL SUPPLY
A318/A319/A320/A321 FLEET DSC-34-30-40 P 1/2
FCOM 19 AUG 10
BUS EQUIPMENT LIST
Applicable to:
NORM EMER ELEC
AC DC AC
ESS
DC
ESS HOT
VOR 1 X
VOR 2 AC2
ILS 1 X
ILS 2 AC2
ADF 1 SHED
ADF 2 �� AC2
DDRMI X
DME 1 SHED
NAVAIDS
DME 2 AC2
BUS EQUIPMENT LIST
Applicable to:
,
,
MSN,,,,
NORM EMER ELEC
AC DC AC
ESS
DC
ESS HOT
VOR 1 X
VOR 2 AC2
MMR 1 X
MMR 2 AC2
ADF 1 SHED
ADF 2 �� AC2
DDRMI X
DME 1 SHED
NAVAIDS
DME 2 AC2
A318/A319/A320/A321 FLIGHT CREW
　
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