Section II. DESCRIPTION AND DATA - TM-11-5821-277-200008

TM 11-5221-277-20

Section Il. DESCRIPTION AND DATA

tronics bay of the aircraft. Control, Radio Set C-

1-5. Purpose and Use

7197/ARC-134 is on the pilot's or copilot's in-

a. Purpose, Radio Set AN/ARC134(*) wer-

strument panel to facilitate tuning b the desired

ates in the very high frequency (vhf) range,

frequency. Figure 12 is a typical block dia-

116.000 through 149.975 MHz, and uses ampli-

gram of Radio Set AN/ARC134(*) installed in

tude modulation (am.) to provide receive and

an aircraft. Additional equipment (para-10) is

transmit voice communications between aircraft,

necessary to permit Radio Set AN/ARC-134(*)

and between aircraft and fixed or mobile ground

to perform its desired function. A vhf antenna

radio stations. Radio Set AN/ARC-134 (*) has

must be provided on the aircraft to permit re-

the design capability to be tuned to any one o f

ception and transmission. Headset H1O1A/U,

1 , 3 6 0 channels spaced at 25-kHz intervals

or equivalent, must be available to provide the

throughout its operating frequency range; how-

operator monitoring capability for audio signals

ever, filters supplied with the AN/ARC134(*)

received by Receiver-Transmitter RT-857/ARC

limit channel spacing to 50 kHz and permit the

134. The headset is normally wired through air-

AN/ARC-134(*) to be tuned to only 680 selec-

craft wiring to Control, Intercommunication Set

table channels Alternate filters can be installed

C-1611(D)/AIC, or equivalent. External push-

which provide a bandpass of 20 kHz for 25-

to-talk switching is also wired through aircraft

kHz channel spacing, providing the 1,360 chan-

wiring to the C1611D/AIC which is wired to

nel tuning capability When used with auxiliary

Receiver-Transmitter RT-857/ARC-134. When

equipment, Radio Set AN/ARC-134(*) receives

the operator presses the push-to-talk switch and

and transmits communication signals for an Air

the transmit

speaks into the microphone,

Traffic control Signaling System (ATCSS).

function of Receiver-Transmitter RT-857/ARG

b. Use. Radio Set AN/ARC-134(*) is normal-

134 is enabled and the desired signal is trans-

ly installed in an aircraft and used by crew-

mitted. When the push-to-t.alk switch is not

members to establish voice communication with

pressed, Receiver-Transmitter RT-857/ARC-194

crewmembers of other aircraft and personnel in

is in the receive mode. Detected audio signals are

fixed or mobile ground radio stations, Mounting

routed through the C1611D/AIC to the oper-

MT-3791(*)/ARC-l34

Receiver-Trans-

and

mitter RT857/ARC134 are located in the elec-

ator's headset.

Figure 1-2. Typical operational block diagram.

1-2