TM 55-1680-351-10
Table 3-1. Controls, Indicators, and Connectors (Cont)
Control, Indicator,
Function
or Connector
Function switch arrow/
Indicates operating mode selected
pushbutton PUSH TO
and locks out VOICE 282.8 posi-
TALK button
tion unless pressed.
When pressed, turns receiver off and
turns transmitter on when function
switch is in either VOICE/
MCW 243.0 or VOICE 282.8 posi-
tion. Best voice transmissions are
obtained when spoken directly into
the TALK microphone. When re-
leased, turns off transmitter and
turns on receiver; received signal is
heard from the LISTEN speaker
or earphone.
MCW button
This button can be used as a tele-
graph key to transmit morse code
when normal voice transmission
may reveal operator's position.
MCW is only available when the
function switch is in the
VOICE/MCW 243.0 position. When
MCW button is pressed, the radio
set transmits a continuous tone,
receiver is off. When button is
released. transmitter is turned off,
receiver is turned on.
VOL control
This controls the sound level from
the LISTEN speaker or earphone.
It controls received signals, not
sidetone. When the control is fully
up in the MAX position, greatest
level of sound is heard; when fully
turned down, lowest level of sound,
but radio set is not turned off.
Control setting does not affect
transmitter output.
3-4
