Step 7. POWER AMPLIFIER CHECKS *

TM 11-5820-890-20-3

3.1.

OPERATIONAL CHECK. Continued

ACTIONS

STEPS

CHECKS

7.1 Connect vehicular antenna

N/A

cable to test set ANT

N/A

Connect W2 cable to

RT ANT and PA J2

N/A

Set test set:

MODE to FWD PWR

N/A

Connect test set cable from

test set RADIO to PA J1

N/A

Set RT CHAN to 1

N/A

YES: Go to Step 7.3

7.2 Press PTT and PTTest

Test set reads

NO:

Go to TS Guide 14

2W or greater?

7.3 Set RT RF PWR to PA

N/A

Press PTT and PTTest

YES: Go to Step 7.4

Test set reads 30 W or

RTA; Go to TS Guide 15

greater?

NO:

RT B; Go to TS Guide 16

7.4 Set RT CHAN to 2

N/A

Press PTT and PTTest

Test set reads 30 W or YES: Go to Step 7.5

NO:

RTA; Go to TS Guide 17

greater?

RT B; Go to TS Guide 18

7.5 Set RT CHAN to 3

N/A

Press PTT and PTTest

Test set reads 30 W or YES: Go to Step 7.6

greater?

NO:

RTA; Go to TS Guide 17

RT B; Go to TS Guide 18

7.6 Press PTT and

Sidetone heard at HS?

YES: Continue

count into HS

NO:

Replace PA

RT SIG display

YES: Go to STEP 8

reads 6 or 7?

NO:

Go to TS Guide 19

* If unit SOP or tactical situation prohibits transmitting, use dummy load and realize that antenna

cannot be checked.

3-7