Daily Preventive Maintenance Checks and Services Chart

TM 11-5985-284-15

3-4. Daily Preventive Maintenance Checks and Services Chart

Item to be inspected

Procedure

References

Sequence

Inspect for bends and distortion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

AT-1082/PRC, sense

whip antenna.

Check to see that loop antenna, opens to operating position with-

AT-1082/PRC, loop

out, binding.

antenna.

Observe effect on signal during operating procedures . . . . . . . . . . .

Sequence num-

AT-1082/PRC, con-

bers 5 through

trols.

20 below.

a. Inspect for damaged connectors. . . . . . . . . . . . . . . . . . . . . . . . . . .

a. None.

Cables . . . . . . . . . . . . .

b. Check for tight connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

b. Sequence

numbers 7

and 8

below.

All antenna and cable connections should be fingertight. Check

Para 2-3.

Connections . . . .

and tighten when necessary.

Fig. 2-3, para

Check to see that the mechanical action of each control is smooth

Controls . . . . . . .

2-6.

and free of external or internal binding.

a. Fig. 2-3.

a. Check to see that the loop antenna can be easily placed into its

Antenna parts . . . . . . .

operating position and that it locks in its detented position.

b. Same as a

b. Check to see that the sense whip antenna can be extended its

above.

full height (12 inches) and remain there.

c. Same as a

Check to see that the sense whip antenna and loop antenna may

above.

be returned, respectively, to their nonactive positions

d. Fig. 1-1.

d. Check to see that the shield cap is attached to the CG-3344/PRC.

a. Para 2-3, fig.

a. Connect the cable to the radio receiver and the AT-1082/PRC;

CG3344/PRC (5-ft) . . .

1-1.

if applicable, attach the shield cap to the radio antenna con-

nector.

b. None.

b. Check the connections for tightness - - - - - - - - - - - - - - - - - - - - - - - -

c. Same as a

c. Check the shield cap for snug fit on the antenna connector of the

above.

radio and for connection to the CG3344/PRC.

a. Fig. 1-1.

a. Connect the CG-2840A/U between the CG-3344/PRC and the

CG-2840A/U (12-ft) . . . .

radio receiver.

b. None.

b. Check the connections for tightness - - - - - - - - - - - - - - - - - - - - - - - - - - - -

c. Sequence

c. Continue to the operational checks - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

numbers 11

through 20

below.

a. Make all transmission and reception arrangements with a dis-

AT-1082/PRC

tant radio transmitter before connecting the AT-1082/PRC

to the receivcr. Note the direction of the transmitter.

Arrange with the distant transmitting station to turn on its

transmitter long enough to make the AT-1082/PRC tests.

b. TO start the test, set the transmit and receive frequency to 30

MHz. If the tactical situation will not permit this arrange-

ment, use the assigned operating frequency.

Caution: Do not transmit from the radio set connected to the

AT-1082/PRC; damage to the equipment may result.

c. On the receive radio set, make the following adjustments:

(1) Set the volume control for maximum signal output.

(2) set the squelch control, if provided, to off.

Para 2-6 and

a. Set ATTENUATOR to 0; BANDSWITCH to 30 (or to position

AT-1082/PRC. con-

sequence No.

corresponding to assigned operating frequency); and FINE

trols and antennas.

10 above.

TUNE to 0 (or to position corresponding to assigned operating

frequency);

b. Set the loop antenna in operating position and extend the sense

whip antenna.

3-2