Section II. DESCRIPTION AND DATA

TM 11-5985-284-15

Section Il. DESCRIPTION AND DATA

homing purposes. A pocket compass can be used

1-4. Purpose and Use

to provide approximate azimuth readings by

u. Purpose. Antenna, Loop AT-784/PRC, when

sighting in the direction of the indicated bear-

used in conjunction with Radio Set AN/PRC-25,

ing.

AN/VRG-12, or their equivalents, comprises a

homing device that enables the operator to find

the direction of a transmitted signal within the

1-5. Technical Characteristics

frequency range of 30 to 76 MegaHertz (MHz).

CAUTION

Frequency range . . . . . . . ..30 to 76 MHz covered

Use the AT-784/PRC for reception only.

in five bands.

Frequency bands. . . . . . . ..(1) 3040 MHz.

Do not transmit. Whenever the loop

(2) 40-50 MHz.

antenna is not in use, keep the AT-

(3) 50-60 MHz.

TENUATOR switch set to 0.

(4) 60-70 MHz.

The unshielded loop antenna of Antenna AT-

(5) 70-76 MHz.

Fine tuning

1082/PRC is used to pick up a homing signal, and

range . . . . . . . . . . . . . . . . .. 0-10 MHz covered in

its extendable sense whip antenna (fig. 1-2) is

1-MHz steps.

used to determine the direction of the transmit-

Signal attenua-

ted signal. The AT-1082/PRC is not provided

tion . . . . . . . . . . . . . . . . . . .. 0-46 dB covered in

with an azimuth indicator, since highly accu-

five step: 0, 10,

rate bearings are not generally required for

20, 30, and 40 dB.

Change 5

1-3