Driver, Discriminator, and Antenna Coupler Tray A5, Preliminary Switch and Control Settings

TM 11-6625-847-12

e. To test the AN/GRC-106 modules, connect and

Swatch or control

Setting

secure the appropriate test tray to the test set with the

ANT. MOTOR CONTROL

Normally

connector holddown screw on the front panel of the

CODE switch

relaxed.

module test tray, as TM 11-6625-847-12 shown in

RF BAND -50Ω -WHIP

RF BAND.

figure 3-8. Refer to paragraph 1-5 for a cross-reference

switch.

of AN/GRC-106 modules testable by the test set test

trays.

3-15.

Driver, Discriminator, and Antenna Coupler

f. On the test tray being used, set the switches

Tray A5, Preliminary Switch and Control

and the controls to the settings listed in the appropriate

Settings

paragraph (para 3-11 through 3-15).

(fig. 3-6 (1) and (2))

g. Set the test set POWER switch to ON; POWER

indicator should light.

Switch or control

Setting

h. On the test set, connect the AN/PSM-6 dc test

POWER switch ------------------

OFF.

leads between DC VOLTAGE test points +20 and

RELAY RELAY CONTROL

ground. Adjust the DC VOLTAGE 20 control for +20-

switch.

volt dc indication on the.AN/PSM-6.

ANTENNA COUPLER:

Note. If tray A5 is connected to the test set,

CODE switch ----------------

perform the procedures given in i below .

50Ω DUMMY LOAD

50Ω DUMMY

i. On the test set, connect the AN/PSM-6 dc test

COUPLER TERMINA

LOAD.

leads between DC VOLTAGE test points +200 and

TION WHIP-50Ω

ground. Adjust the DC VOLTAGE 200 control for +200-

DOUBLET switch.

volt dc indication on the AN/PSM-6.

DISCRIMINATOR TEST

SELECTOR switch.

3-17. Preparation for System Test Operation

DRIVER:

Prepare for the AN/GRC-106 system test with the test

BAND SEL switch ----------

3.25 MC.

set as follows:

TEST SELECTOR 1.

a. Perform the procedures given in paragraph 3-

switch.

16e through h and, if necessary, the procedures given in

paragraph 3-16i.

3-16. Starting Procedures

b. Rotate the SERV SEL switch to STBY; allow 15

Apply power to the test set as follows:

minutes for warmup.

a. Set the switches and the controls located on the

test set to the settings listed in paragraph 3-10.

3-18. Preparation for Module Test Operation

Note.

If the AN/GRC-106 modules test is

Prepare to test the AN/GRC-106 modules with the test

set as follows:

to be done, perform the procedures given in e

a. Perform the procedures given in paragraph 3-

below. For a system test, perform the procedures

17b, c, and d and, if necessary, the procedures given in

given in b below.

paragraph 3-16i.

b. Connect the equipment to be tested to the test

b. Rotate the SERV SEL switch to STBY.

set with the appropriate test cables as shown in figures

c. Set the test tray POWER switch to ON.

1-1 and 4-1.

c. Set the test set POWER switch ON; POWER

3-19. Stopping Procedures

indicator should light.

Shutdown the test set after use as follows:

d. On the test set, connect the dc test leads of

a. Set the SERV SEL switch to OFF.

Multimeter AN/PSM-6 (AN/PSM-6) between DC

b. Set the test set POWER switch to OFF.

VOLTAGE test points +20 and ground. Rotate the

SERV SEL switch to OVEN ON, and adjust the DC

VOLTAGE 20 control for a +20volt de indication on the

multimeter.

3-23