Test Setup - TM-11-5820-398-350084

Figure 28. Typical alignment cover for

module A20.

Section II. THIRD ECHELON TROUBLESHOOTING

Caution: Do not attempt removal or replacement of parts before reading the instruc-

tions in paragraph 40.

37. Test Setup

a. Preparatory Steps. Prepare the RT-

505/PRC-25 for bench testing as follows:

Position or indication

Control

(1) R e m o v e Battery Box CY-2562/

B A N D SWITCH a -------

C or D

PRC-25 and Battery, Dry BA-386/

RF TUNING controls ---

45.00 or 64.00

PRC-25 (TM 11-5820-398-10 (para

DEVIATION RANGE

28)).

switch.

OPERATION switch ----

(2) Remove the receiver-transmitter

DEVIATION LEVEL

Adjust for 10 kc on

case (TM 11-5820-398-20 (para

control.

KILOCYCLES DEVIA-

8)).

TION meter.

Adjust for MICROVOLTS

RF SET TO LINE

(3) Be sure the POWER receptacle

control.

meter indication at RF

cover is on the POWER receptacle.

SET TO LINE.

The POWER receptacle cover con-

RF ATTENUATOR MI-

Adjust for 0.70 microvolt

CROVOLTS control.

on right-hand meter,

tains jumpers necessary for bat-

tery operation.

`The setting of the BAND SWITCH and the RF TUNING control

will be determined by the RT-505/PRC-25 operating frequency.

(4) Connect the BA-386/PRC-25 to the

battery plug on the RT-505/PRC-

(b) Connect the AN/URM-48 RF ca-

25.

ble to one end of the dummy an-

b. Test Equipment.

tenna.

(1) Receiver section.

(c) Connect the other end of the

(a) Use the AN/URM-48 to provide a

dummy antenna to the receiver-

test signal. Set the controls on the

transmitter ANT connector; use

AN/URM-48 as follows:

cord CG-530/U.