TM 1-1510-223-10
NOTE
The first one or two digits (MHz) of the
frequency are shown on the upper right portion
of the display, while the last four digits (kHz) of
frequency are displayed on bottom of display.
9.
Frequency/channel selector switch - Turn
knob until desired number has been selected
A flashing dash will appear to right of channel
number to indicate that transceiver is in
program mode.
10.
Continue moving cursor and changing digits
until desired transmit frequency appears in
display.
NOTE
The program mode may be exited at any time
and the previously stored frequency returned
by keying the microphone.
11.
Store switch - Depress a second time to store
frequency in transmit portion of memory.
Cursor will stow and flashing dash will
disappear to indicate that HF control-display
unit is no longer in program mode.
12.
Antenna coupler - Tune by keying radio
momentarily. During antenna coupler tuning
process,
TX
on
display
will
flash
and
frequency numbers will be blank.
13.
When TX annunciator stops flashing and
frequency reappears, antenna tuning cycle is
complete and transceiver is ready to transmit
on selected frequency.
e.
Clarifier Operation. A clarifier function is provided
by the control-display unit which allows the operator to
make small adjustments to the receive frequency when
operating in the channel mode (simplex or semi-duplex)
in the USB mode. The clarifier is not normally used in
the AM mode and cannot be used with the emission
mode selector switch in the A3J position
The
clarifier
helps
eliminate
unnatural
sounds
associated with SSB transmission as a result of off-
frequency ground station transmissions. Operate
clarifier as follows:
1.
Frequency/channel selector switch - Depress
repeatedly until last digit of receive frequency
is flashing.
2.
Frequency/channel selector switch - Rotate to
increase or decrease last digit of receive
frequency by one increment
3.
Received audio quality - Monitor. If reception
does not improve sufficiently, try additional
changes in last digit.
NOTE
If transmission is made while using clarifier,
transmission will be on the originally selected
frequency. The dash to the right of the
channel number will not flash and the
transceiver will not be in the program mode.
4.
To exit clarifier mode, depress store switch or
return last digit to original frequency selection.
f.
Maritime Radiotelephone Network Channel
Operation. The memory of the control-display unit
has all 176 ITU (International Telecommunications
Union) public correspondence channels programmed
permanently into its memory. Operation in this mode is
as follows:
1.
Emission mode selector switch - A3J.
2.
Frequency/channel selector switch - Depress
repeatedly until channel number is flashing.
3.
Frequency/channel selector switch - Turn to
select desired channel number.
4.
Frequency/channel selector switch - Depress
repeatedly until cursor is at digit to be
changed
5.
Frequency/channel selector switch - Turn
knob until desired number has been selected.
NOTE
There are only two cursor positions for the lTU
channel number. The hundreds position also
controls the thousands position. For example,
if the displayed channel number is 1204, the
cursor could be moved to the 12 but not the 1.
With the cursor in the 12 position, turning the
frequency/channel selector one step counter-
clockwise will change the 12 to an 8, while
another step in the same direction will change
8 to a 6. This is consistent with the actual
channel numbers.
6.
Antenna coupler - Tune by keying radio
momentarily. During antenna coupler tuning
process,
TX
on
display
will
flash
and
frequency numbers will be blank
7.
When TX annunciator stops flashing and
frequency reappears, antenna tuning cycle is
complete and transceiver is ready to transmit
on selected frequency.
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