Learjet 60 - Selcal

Learjet 60

Pilot's Manual
SELCAL
The SELCAL system permits the selective calling of individual
air-
craft over normal radio
communications circuits linking the ground
station with the aircraft . The SELCAL
system is integrated into the
VHF and HF communication systems
to relieve the flight crew from
continuously monitoring communications
frequencies during flights
of extended duration . The system consists of
a decoder unit and the
SELCAL
control panel located on the center
instrument panel . The
system is
powered by 28 VDC through the 1-amp
SELCAL circuit
breaker on the pilot's circuit
breaker panel .
When a call is received, the appropriate
annunciator (VHF 1,
VHF 2,
HF 1 or HF 2) in the SELCAL
control panel will illuminate and an
in-
termittent aural tone will sound .
The annunciator is then
depressed
and communication with the caller
can be established . When
the but-
ton is depressed, the aural tone
will cease .
The system may be tested by
depressing the SELCAL
TEST button .
When this is done, all three
annunciators will illuminate
and an aural
tone will sound . In
order
to
extinguish the
annunciators, each button
must be depressed . The
aural tone will cease when
the last button is
depressed .
PM-123

5-43
Original