Section III. RETRANSMISSION OPERATION

TM 11-5821-285-12-1

Component

Control

Position

Component

Control

Position

FM control head-

Mode control switch ..............

OFF

ARC-51BX con-

POWER ON-OFF switch ......

OFF

stations 1. 2, 3

VOL control...........................

full counter

trol head-sta-

Function select switch ..........

OFF

clockwise

tion 3, (V2)

SQUELCH switch .................

TONE

version

KY-28 control

POWER switch .....................

off (down)

ARC- 164 radio

Function switch.....................

OFF

head-stations

PLAINICIPHER switch ..........

PLAIN

Console controls

POWER switch .....................

OFF

1, 2 and 3

RE-XREG switch ..................

REG

ZEROIZE switch ...................

off (down)

Section III. RETRANSMISSION OPERATION

ting cable

3-10. General

(and

not

When the HYL-3/TSEC is installed, the

auxiliary

retransmission channel will retransmit either plain or

audio

secure voice signals automatically. For the console

amplifier),

operator to monitor secure voice retransmissions, a

must switch

TSEC/KY-28 must be installed in the console KY-28

between

number 1 mount.

b. The purpose of retransmission is to provide a

means of VHF-FM communication between two ground

stations that would otherwise not have a reliable link

between them. Mountainous terrain, long distance, high

building or dense forest may contribute to link

unreliability. Retransmission may be used to increase

link reliability. The console should be configured for its

retransmission communication mode and the equipment

fully checked for operation before beginning the mission.

(See preliminary starting procedures.) In addition,

coordination between other stations (terminal stations)

should be accomplished.

The coordination for

retransmission involves the selection of operating

frequencies to minimize interference and geographic

areas to best serve ground stations. The operator may

assist the ground stations in establishing the

retransmission link once airborne. The operator should

make contact with ground station 1 and ground station 2

and monitor the channel to ensure the two stations can

communicate with each other. For instructions on

selection of retransmission frequencies to minimize

interference refer to paragraph 3-14(e).

c. For proper operation of the AN/ASC-15A(V)(*)

retransmission channel, all squelch switches should be

placed to TONE. To be compatible with this, terminal

stations should have their squelch controls set as

follows:

NOTE

Terminal

stations

using

the

TSEC/KY-8

and

RT-

524/VRC

combination

which used

single

(not

branched)

radio-X-

mode

interconnec