TM 55-1510-219-10
Figure 3-3. UHF Control panel (AN/ARC- 164)
the guard frequency and the
guard receiver is disabled.
SQUELCH
Turns main receiver squelch on
switch
or off.
VOL control
Adjusts volume.
TONE
When pressed, transmits a 1,020
pushbutton
Hz tone on the selected frequen-
cy.
Function selector
Selects operating function.
OFF
Turns set off.
MAIN
Selects normal transmission with
reception on main receiver.
BOTH
Selects normal transmissions
with reception on both the main
receiver and the guard frequency
receiver.
ADF
Activates ADF or homing sys-
tem (if installed) and main re-
ceiver.
c. Normal Operation.
(1) Turn on.
1. Insure aircraft power is on.
NOTE
It is presumed the AVIONICS
MASTER POWER switch is on,
and that normally used avionic
circuit
breakers
remain
depressed.
2. AVIONICS MASTER POWER switch
(overhead panel) - ON.
3. Function switch (UHF panel) MAIN or
BOTH position, as required.
NOTE
If function selector is at MAIN
setting, only the normal UHF
communications will be received.
If selector is at BOTH position,
emergency communications on
the guard channel and normal
UHF communications will both be
received.
(2) Receive.
1. UHF audio monitor switch (#3, audio
panel) - ON or transmit/interphone
selector (audio panel) - 3 position.
3-6
