BendixKing KHF 990 - Manual (Page 30)

KCU 951 CONTROL DISPLAY UNIT
The KCU 951 (Figure 2-4) provides the pilot access to 99 program-
mable channels plus a full 280,000 operating frequencies in the 2.0 to
29.9999 MHz range. It provides semi-duplex capability through the 99
programmable channels to interface with maritime radiotelephone
networks. A Dzus rail-mounted control display unit, the KCU 951,
uses electronic gas discharge readouts to display frequency, channel
and mode of operation. All necessary controls for operation of the
KHF 950/990 system, including programming of all preset channels,
are on the KCU 951. The 99 channels can be easily programmed by
the pilot on the ground or in the air, and the nonvolatile memory
stores this information even when the system is turned off.
Description
2-5 KHF 950/990 Pilots Guide
Rev. 0
Dec/96
FREQ KHZ CHANNEL
CLARIFIER
PULL
SQUELCH
OFF
VOLUME
STO PGM
MODE FREQ CHAN
HF
ı
12345.6 99
USB AM LSB PGM TX
Gas discharge
readouts display all
frequncies and
preset channel
numbers.
Smaller gas
discharge
characters display
emmision mode,
transmit indicator
and program mode
indication.
CLARIFIER knob adjusts receive frequency to
improve speech quality in a single sideband
operating mode. Use of this control is only
required when station-to-station frequency
difference is significant.
SQUELCH knob
helps cut out
background noise
when not
receiving a signal. OFF/VOLUME
knob turns
system on and
adjusts audio
volume.
STO (store)
switch stores
displayed
frequency and
emmission mode
in memory.
PGM (program)
switch permits pilot
to change frequncy
and emission mode
of preset channel. Concentric
Frequency/Channel
knobs set frequency
or select preset
channel.
Photocell
dims display
automatically.
EMMISSION MODE
switch selects lower
sideband (LSB
where aproved),
upper sideband
(USB) or AM
modes.
FREQ/CHAN
(frequency/channel)
switch selects either
direct tuning or
preset channel
operation.
Figure 2-4 KCU 951 Control Display Unit