TM 1-1510-225-10
3-2
1. Frequency Display
2. Mode Display
3. CHANNEL Display
4. Light Sensor
5. Emission MODE Switch
6. FREQ / CHAN Switch
7. PGM Button
8. Frequency / Channel Selector
9. STO Button
10. VOLUME / OFF Switch
11. SQUELCH Switch
12. CLARIFIER Switch
Figure 3-1. HF Control Panel
(b) Channel Control. Outer knob that
changes channel frequencies. The outer knob is not
functional when the FREQ / CHAN switch is in the
CHAN position. The inner knob will provide channel
control from 1 through 99, displayed at the right end of
the display window.
(9) STO Button – Stores displayed data
when programming preset channels.
(10) VOLUME / OFF – Applies power to the
unit and controls the audio output level.
(11) SQUELCH – Provides variable squelch
threshold control.
(12) CLARIFIER – Provides 250 Hz of local
oscillator adjustment.
c. Operation.
(1) Frequency Operation (Simplex Only).
Each digit of the frequency may be selected instead of
dialing up or down to a frequency. The larger
concentric knob is used to select the digit to be
changed. This digit will flash when selected. Rotation
of the knob moves the flashing cursor the direction of
rotation. After the digit to be changed is flashing, the
smaller concentric knob is used to select the numeral
desired. This process is repeated until the new
frequency has been selected. The flashing cursor may
then be stowed by moving it to the extreme left or right
of the display and then one more click. This stows the
cursor behind the display until needed again. The
cursor may be recalled by turning the concentric knob
one click left or right.
(a) Direct Frequency Tuning (Simplex
Only).
1. FREQ / CHAN Button – Out
(FREQ ).
2. Select desired Mode – USB, LSB,
or AM.
3. Select digit to be changed –
Outer knob. Digit (Cursor) will
flash.
4. Select numerical value of digit –
Inner knob.
5. Stow
cursor
–
Or
repeat
procedure for additional changes.
6. Tune antenna coupler – Press
microphone button.
(2) Channel Programming. There are three
ways to set up a channel: Receive only, simplex, and
semi-duplex.
To
gain
access
to
channelized
operation, press FREQ / CHAN button. To utilize the
existing programmed channels (i.e., no programming
required), use the small control knob to select the
desired channel number. Then momentarily key the
