TM 11-5820-890-10-3
RECEIVER-TRANSMITTER
RT Front Panel
FCTN (function) switch. Sets RT function; operating positions are: SQ ON, SQ OFF, RXMT, and REM. The FCTN
switch has positions which are boxed-in. You must pull knob to turn to these positions. This guards against FCTN switch
accidentally being moved to these positions. Pull knob to turn to OFF , STW , and Z-A .
NOTE
For a complete view of RT front panel, refer to the above
illustration.
FCTN Switch
•
OFF (off)
Turns off primary power to the RT, HUB remains operational. In OFF, radio draws HUB
power to maintain memory (SC and FH data) and will maintain sync time for 24 hours.
Use SQ ON rather than OFF for listening silence.
•
TST (test)
Starts RT self-tests. Circuits tested include ECCM, data, and RT. Displays show results.
•
SQ ON (squelch on)
Turns on RT and squelch. Used for communication with similar radios. Prevents rushing
noise in handset or loudspeaker.
•
SQ OFF (squelch off)
Turns on RT, but not squelch. Used with single channel (SC) communications with radios
having different squelch systems. May be helpful when RT is being jammed during single
channel operations.
•
RXMT (retransmit)
Puts RT into retransmit mode. Used for retransmit operations.
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