Technical information

CHANNEL OPERATION AND PROGRAMMING 2
If channel programming is required, it is necessary to activate the
program mode once you are in channelized operation. Use a pencil
or similar pointed object to push the PGM (program) switch “in”. (This
switch is located on the lower right of the KCU 951 Control Display
Unit.) The letters “PGM” will appear in the lower part of the display
window and the KHF 950/990 will remain in the program mode until
the PGM switch is pressed again. (The switch is an alternate-action
type: push on, push off.) It is recessed to prevent accidental activa-
tion of the program mode.
Now you are ready to program. The procedures are only slightly dif-
ferent, depending on the type of channel you are programming.
1. Semi-duplex. The pilot programs two different frequencies, one
for receive and one for transmit. He also assigns an operating mode
(USB, LSB or AM). Semi-duplex is used by maritime radiotelephone
network (public correspondence) stations.
2. Simplex. The pilot programs the same frequency in receive and
transmit, and assigns an operating mode (USB, LSB or AM). (Used
by Air Traffic Control, ARINC and others.)
Operation
3-56
KHF 950/990 Pilots Guide
Rev. 0
Dec/96
FREQ KHZ CHANNEL
CLARIFIER
PULL
ON
SQUELCH
OFF
VOLUME
STO PGM
MODE FREQ CHAN
HF
ı
12345.6 99
USB
Figure 3-69 Channel Operation And Programming 1
FREQ KHZ CHANNEL
CLARIFIER
PULL
ON
SQUELCH
OFF
VOLUME
STO PGM
MODE FREQ CHAN
HF
ı
12345.6 99
USB PGM
Figure 3-70 Channel Operation And Programming 2