TM 1-1510-218-10
3A-14
1. Frequency Selector
2. MHz Indicator
3. SQL Control
4. RF TEST Indicator
5. Mode Selector
Figure 3A-6. HF Control Panel
(c) LSB. Places set in Lower Sideband
mode.
(d) AM.
Places set in Amplitude
Modulation mode.
(e) CW. Not used in this installation.
(f) SVU. Not used in this installation.
(g) SVL. Not used in this installation.
(h) RF TEST. Places set in test mode.
c. Operation.
CAUTION
Operation of the system is limited to
1 minute
transmission
(keyed)
with
a
3 minute (unkeyed) for SSB voice; 1 minute
transmission (keyed) with a 7 minute
(unkeyed) for AM, voice modulation up to
55 °F (131 °F) ambient temperature.
NOTE
No warmup is required before operation.
The system may be operated in the receive
mode continuously.
1. Mode selector – As required.
2. Frequency selector – Select.
3. Squelch control – Set, turn completely
clockwise.
4. Tune the system by momentarily
pressing the microphone switch. A
constant tone will be heard while the
system is tuning, average tuning time
is 3 to 5 seconds. After tuning, the
tone stops and receiver noise will be
heard.
NOTE
If a fault occurs during the tuning process,
an interrupted tone (beeping) will be heard
in the headset. To clear a fault, change any
frequency selector knob at least one step
and then return to the desired setting.
Another tune cycle may now be attempted
by pressing the microphone switch.
