Selcal - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

SELCAL

The SELCAL feature allows an ATC ground
station to call the flight crew over the HF radio
when out of VHF communication range.
Primarily used for position reporting during
overseas flights, the SELCAL system allevi-
ates the necessity for flight crew monitoring
of static-filled HF frequencies. Ground stations
with tone-transmitting HF communication
equipment initiate calls to aircraft equipped
with a four-tone SELCAL code. An internal
aircraft switchlight and aural tone alert the
flight crew of the incoming call.
HF1 PRESS TO RESET SWITCH/LIGHT
COMES ON TO INDICATE AN INCOMING
CALL ON HF1. WHEN PRESSED, RESETS
THE SELCAL SYSTEM, AND THE PRESS
TO RESET SWITCHLIGHT GOES OUT.
PRESS
RESET
VOLUME CONTROL
SELCAL CONTROL PANEL AND AURAL WARNING TEST PANEL
16-6 CL 601-3A/R
TEST SWITCH
WHEN SET TO THE TEST
POSITION, SIMULATES AN
INCOMING CALL.
HF
TO
1
SELCAL
AURAL WARNING
SELCAL
LDG GR
TOC
ALT ADV
TONE TEST
Figure 16-5. SELCAL Panel
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
The SELCAL system consists of a decoder
unit, a code selection box, and a SELCAL
control panel (Figure16-5). When the decoder
receives a signal from a ground station, the de-
coder compares the signal to a signal in the
code selection box. If the decoder interprets
a valid signal and the SELCAL-OFF-TEST
switch is in the SELCAL position, an aural
chime and a PRESS-TO-RESET switchlight
illumination alert the flight crew of a ground
station position report request. The flight crew
depresses the PRESS-TO-RESET switchlight
to extinguish the light and reset the circuit.
Placing the SELCAL-OFF-TEST switch to
TEST initiates a test of the SELCAL chime and
annunciators.
NOTE:
FOR NORMAL SELCAL OPERATION,
PLACE TEST–OFF–SELCAL SWITCH
TO THE SELCAL POSITION.
HF2 PRESS TO RESET SWITCH/LIGHT
COMES ON TO INDICATE AN INCOMING
CALL ON HF2. WHEN PRESSED, RESETS
THE SELCAL SYSTEM, AND THE PRESS
TO RESET SWITCHLIGHT GOES OUT.
TEST
HF
OFF
2
OFF
FIRE
OVSPD
TONE
MUTED
STALL
FLAP
PRESS TO MUTE
OVSPD
PRESS
TO
RESET
L t é e
L t d .