COMMUNICATIONS, HF COM
Operation
Aircraft Operations Manual
4/2.2
O
PAGE
1
Apr 01/15
COLLINS HF 230
HF
−
230 COM SYSTEM
For more detailed information see
Collins Pilot’s Guide for HF
−
230
1.
LIMITATIONS
Do not tune or transmit on HF during refueling.
2.
NORMAL OPERATION
CONDITIONS
NORMAL PROCEDURES
2.1
POWER UP
1.
L AVION switch
ON
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Power is supplied to the HF by L AVION switch ON.
2.
HF volume lever (ACP)
TEST
. . . . . . . . . . . . . . . . . . . . . . . . . .
−
Set lever to approximately middle position.
3.
Squelch control
TST
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
HF volume lever (ACP)
ROTATE
. . . . . . . . . . . . . . . . . . . . . . . . . .
−
Set lever to proper volume.
−
Rotating the volume control clockwise out of detent applies power to the
HF.
Allow 15 minutes warmup before use.
NOTE
2.2
USER
CHANNELS
PROGRAMM
ING
The 40 user programmable channels can be easily programmed on ground or
in flight. All programmed information is stored in nonvolatile memory and can
be easily recalled by selecting the desired user channel number.
There are three types of channels that can be programmed:
A.
Half duplex.
The user programs two different frequencies, one for receive and one for
transmit. The user also assigns one of the available operating modes (USB,
LSB, AM, TEL SUP CAR or TEL PLT CAR) to the selected channel. Half du-
plex operation is used by the maritime radiotelephone network (public corre-
spondence) stations.
1.
Ensure that the CHAN/FREQ selector is in the CHAN position.
(Cont’d)