Figure 2-1. Test Set, Radio TS-1967/ARC-54, front panel view, parts location.

TM 11-6625-601-34

Figure 2-1. Test Set, Radio TS-1967/ARC-54, front panel

view, parts location.

switches S10 to RADIO and S11 to TEST SET.

p e r c e n t ) resistor between pins 2 and 4 of

(f) Set RCVR/XMTR FUNCTION switch

HEADSET jack J7.

S9 to PTT. (All other switches may be in any

(b) Apply +27.5 1 volts dc to test set

position.)

POWER jack J32.

(g) Apply a 1,000-Hz, 0.135-millivolt (mv),

(c) Set test set POWER circuit breaker to

root-mean-square (rms) signal between pins 3

ON.

(high) and 1 (low) of HEADSET jack J9. (To

(d) S e t t e s t s e t T E S T F U N C T I O N

obtain the 0.135-mv rms signal, apply 135 mv

SELECTOR switches S10 to SIM, and S11 to

rms across a 1,000-to-l voltage divider (fig. 2-13).

TEST SET.

(h) Connect the vtvm between pins 5 and

(e) S e t

test

set

RCVR2)XMTR

6 of RCVR/XMTR jack J11. Note that 390 mv

FUNCTION switch S9 to TEST.

rms is indicated on the vtvm. If this reading is

(f) Set the simulator HEADSET VOL con-

not obtained, perform the audio amplifier ad-

trol fully clockwise.

justment procedure (para 2-20).

(g) Apply a 1,000-Hz, 0.135-mv rms signal

(2) Voltage

measurements

for

audio

between pins 3 (high) and 1 (low) of HEADSET

amplifier card A1 (part of Simulator-Test Set

jack J7. (To obtain the 0.135-mv rms signal,

SM-349/ARC-54).

apply 135 mv rms across a 1,000-to-1 voltage

(a) Connect a 10-ohm (22-watt, 10-

2-3