TM 1-1510-225-10
3C-2
the pilot and copilot. This panel is equipped with two
sets of identical controls. Separate speaker and
interphone isolation amplifiers are provided so that
either the pilot or copilot may transmit to the cabin
speakers.
b. Controls, Indicators, and Functions.
(1) Pilot’s COMM 1 Switch – Selects very
high frequency receiver.
(2) Pilot’s COMM 2 Switch – Selects very
high frequency receiver.
(3) Pilot’s
HF
Switch
–
Selects
high
frequency receiver.
(4) Pilot’s UHF Switch – Selects ultra high
frequency transmitter.
(5) Pilot’s NAV 1 Switch – Selects VOR
audio.
(6) Pilot’s NAV 2 Switch – Selects VOR
audio.
(7) Pilot’s MKR BCN 1 Switch – Receives
audio from marker beacon.
(8) Pilot’s MKR BCN 2 Switch – Receives
audio from marker beacon.
(9) Pilot’s DME Switch – Receives DME
audio.
(10) Pilot’s
TACAN
Switch
–
Receives
TACAN/DME audio.
(11) Pilot’s ADF Switch – Receives ADF
audio.
(12) Copilot’s COMM 1 Switch – Selects very
high frequency receiver.
(13) Copilot’s COMM 2 Switch – Selects very
high frequency receiver.
(14) Copilot’s HF Switch – Selects high
frequency receiver.
(15) Copilot’s UHF Switch – Selects ultra high
frequency transmitter.
(16) Copilot’s NAV 1 Switch – Selects VOR
audio.
(17) Copilot’s NAV 2 Switch – Selects VOR
audio.
(18) Copilot’s MKR BCN 1 Switch – Receives
audio from marker beacon.
(19) Copilot’s MKR BCN 2 Switch – Receives
audio from marker beacon.
(20) Copilot’s DME Switch – Receives DME
audio.
(21) Copilot’s TACAN Switch – Receives
TACAN/DME audio.
(22) Copilot’s ADF Switch – Receives ADF
audio.
(23) Copilot’s
XMTR
Selector
–
Selects
COMM 1, COMM 2, HF, UHF, INTPH, or CABIN.
(24) Copilot’s AUDIO / SPKR Switch – Routes
audio to overhead speakers.
(25) Copilot’s VOICE / RANGE Switch.
(a) VOICE – Kills range, allows voice.
(b) BOTH – Allows both voice and range.
(c) RANGE – Kills voice, allows 1020 Hz
range tone.
(26) INPH HOT / OFF Switch – Allows
interphone communication between pilot and copilot
without keying the MIC button.
(27) Pilot’s VOICE / RANGE Switch.
(a) VOICE – Kills range, allows voice.
(b) BOTH – Allows both voice and range.
(c) RANGE – Kills voice, allows 1020 HZ
range tone.
(28) AUDIO EMER / NORM Switch.
(a) NORM – Allows normal operation of
the audio amplifier.
(b) EMER – Allows reception of all audio
in headphones in the event of failure of audio amplifier.
(29) Pilot’s AUDIO SPKR Switch – Routes
audio to overhead speakers.
