OPERATIONAL CHECK PROCEDURE

TM 11-6625-2975-12

3-9. OPERATIONAL CHECK. (CONT)

INITIAL SETUP

Perform self-test operation (para 2-3, steps 1 through 5),

OPERATIONAL CHECK PROCEDURE

The following table gives the operational check procedures or minimum performance test for test set.

Perform each step in action column. Next, see the indication column for the expected response. The

indication column also refers the operator to the appropriate repair or replacement procedure.

ACTION

INDICATION

Test set display status should be as follows

1. Set rf output level to -50 dB mW and

for each selected frequency:

sequentially select frequencies of

74.60,75.00, and 75.40 MHz.

INDICATION

DISPLAY

RDL/DDM/MOD

95.0 MOD (%)

AUDIO STATUS

STANDARD

FREQUENCY

(frequency selected) MHz

MODE

-50 dB mW

RF LEVEL

PH LOCK, LEVEL CAL

RF STATUS

400 Hz

TONE SELECT

FUNCTION/

No keys lit

CONTROL

DATA ENTRY

No keys lit

RF SELECT

RF FREQ key lit

If display status is not indicated. as shown

above, refer test set to higher level of

maintenance.

1300 Hz key lamp should light. If not, see

2. Press 1300 Hz key.

para 3-11.400 Hz key lamp should go out.

If not, refer test set to higher level of

maintenance.

3000 Hz key lamp should light. If not, see

3. Press 3000 Hz key.

para 3-11.1300 Hz key lamp should go out.

If not, refer test set to higher level of

maintenance.

No changes should occur on front panel. If

4. Sequentially press 30 HZ VAR, 9960 FM,

9960 Hz, 1020 Hz, 90 Hz, and 150 Hz

any change occurs, refer test set to higher

level of maintenance.

keys.

3-6