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Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
06−10−23
RMU HF DISPLAY (CONT'D)
HF Memory and Control Pages
The HF Control page provides active and preset channel tuning, emission mode control, memory
channel recall/store, HF status, squelch level tuning and transmitter power level tuning.
The HF Memory page provides active channel tuning, memory channel tuning and HF status.
GF0610_049
HF 1 MEMORY Page HF 1 CONTROL Page
HF 1 MEMORY
12260
MODE:
ACTIVE
LOAD
29000
MORE
RETURN TO
RADIOS
UV
MEMORY−10
UV
29209
MEMORY−11
UV
29200
MEMORY−12
UV
SIMPL
HF 1 CONTROL
12260
MODE
ACTIVE
TRANSFER
29000
RETURN TO
RADIOS
UV
PRESET
UV
TEMP− 1
ACT :SIMPL
LEVEL
SQUELCH:MAX POWER
TX :MAX
M PORDEE :SIMPL
COMMUNICATIONS
Flight Crew Operating Manual Rev 3, Apr 25, 2005
CSP 700−5000−6
Volume 2
06−10−24
SELCAL
The Selective Calling System (SELCAL) monitors the ground stations for a four letter tone code that
is transmitted to the airplane on the VHF or HF communication systems. When the SELCAL receives
the code, it sends a visual and aural message to alert the flight crew.
The SELCAL decoder unit located in the forward avionics equipment bay, has five audio input
channels used to monitor the audio output from:
· VHF COM 1.
· VHF COM 2.
· VHF COM 3.
· HF COM 1.
· HF COM 2.
The SELCAL interfaces with the audio integrating system (audio control panels), flight compartment
speakers and EICAS. Each airplane is assigned its own SELCAL code at the time of installation.
Upon receiving the code for which it was programmed, the SELCAL will signal the audio integrating
and EICAS systems that a call has been received.
Operation
The VHF and/or HF communication systems are tuned to a SELCAL frequency that has been
assigned to a ground station.
When a ground station wants to talk to the flight crew, the ground station sends a SELCAL code
on the assigned frequency. The SELCAL unit monitors the VHF and HF communication systems
audio output channels.
When a SELCAL signal is received, the decoder checks the signal tones for the correct frequency,
sequence, amplitude, and duration.
GF0610_050
" SELCAL, SELCAL"
If all the parameters are met, a SELCAL HF or VHF advisory message will be displayed on EICAS
and the audio integrating system will command an aural message “SELCAL, SELCAL” in the flight
compartment speakers and headsets.
The pilot selects the respective VHF or HF system on the audio panel and when the PushToTalk
(PTT) switch is pushed, the EICAS message is cancelled.
COMMUNICATIONS
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
06−10−25
RADIO ALTIMETER
The Radio Altimeter (RA) system provides airplane altitude above the terrain up to +2550 feet. The
RA system is comprised of two RA transceivers, each connected to two separate antennas. The
antennas are identical and dedicated, one for transmitting and the other for receiving. The antennas
are positioned on the bottom centerline of the fuselage to minimize performance degradation in turns
and prior to landing while in the flare on landing.
GF0610_051
RAD
Radio Altitude Failure
Boxed "RAD"display replaces
RA digits.
Takes priority over miscompare
annunciation.
Radio Altitude Miscompare
Boxed " RAD"display above
RA digits.
Indicates a miscompare of
greater than 10 feet on ground
and varies with altitude in flight.
0 RAD
20 20
20 20
The altitude above the terrain indication for approach and landing phases of operation is displayed
on the Primary Flight Display (PFD).
GF0610_052
MINIMUMS Outer Knob
Height (DH) value on PFD.
RAD − Sets the Decision
AP1 HDG 104 00
VAPP
500 RAD
ASEL
VNAV
RAD BARO
MINIMUMS
The Decision Height (DH) is displayed on the PFD when the minimums on the PFD controller is set
to RAD.
The following systems receive RA information:
· TCAS.
· EGPWS.
· FCUs.
· DAUs (to display processors for PFD displays).
Refer to FLIGHT INSTRUMENTS Chapter 11, for additional information on RA indications.
COMMUNICATIONS
Flight Crew Operating Manual Rev 3, Apr 25, 2005
　
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