Preoperation

TM 11-5821-285-12-1

Step

Component

Control

Position

Indications

(Retransmit operation)

CAUTION

FM control head station 1Function selector

RETRAN as desired

Do not key radio while it

is changing frequency.

Station 3 with ARC-164 radio

Function selector

BOTH

Press TONE switch and listen

for 1020 Hz tone with ICS box

RECEIVERS 4 switch ON.

VOL

Clockwise (as desired)

SQUELCH

ARC-51BX control head,

VOL

Clockwise (as desired)

(V2) version

DISABLE

OFF

Function selector

T/R

Panel indicator light illuminates

KY-28 control head

POWER

ON (up)

PQWER ON indicator on KY-28

control head lights.

Stations 4, 5 and 6

ICS boxes switches UP (as desired)

None

HYL-3/PTSEC

Refer to KAM-248A/TSEC for

starting operating, and

stopping

procedures.

basic missions (modes of operation) that the equipment

3-7. Preoperation

can perform, these are: command post; retransmission

Preoperation of the command console may be divided

of plain and secure voice com- munications; and

into the following phases: preparation for daily operation,

retransmission of plain voice communications only (no

verification that the starting procedure has been

monitoring).

accomplished, and verification that the console operating

WARNING

accessories are properly connected. Normal operation

includes these phases: nonsecure/secure radio

This console is not a secure means of

operation, two channel intercommunication (with six

communications unless all of its

stations), and automatic secure and nonsecure

associated RT's are equipped with

retransmission.

COMSEC security devices.

When

a. If the system is in operational status and the

operating with less than a full com-

plement of COMSEC equipment, do not

operator is merely assuming duties from another

operator, omit b through d below. If the system is in a

transmit on a nonsecure RT while

classified

information

being

nonoperational status, perform b through d below.

discussed on any other channel of this

b. Check that all cable connections are properly

console.

This also includes the

connected for the assigned mission.

associated intercom system.

c. Ensure that the clock has been wound and

a. Intercom Operation (fig. 3-1). Two methods of

indicates the correct time, and that all radios and

intercom operation are available to the pilots and

cryptogear, including the HYL-3, is installed.

operators as follows:

d. Check that the starting procedure of paragraph 3-

(1) Normal intercom (INT).

6 has been accomplished and that all radio channels are

(a) Set the applicable ICS box RECEIVERS INT

set at the frequency specified in the station frequency

switch to ON to receive intercommunications.

plan.

(b) Set the applicable ICS box transmit- interphone

e. To establish communication on the nonsecure

selector switch to INT to talk on the intercommunications

radios, proceed as detailed in paragraph 3-8b(1).

circuit.

f. To use the intercommunication facilities, proceed

as detailed in paragraph 3-8a

associated U-94A/U and speak into the headset-

g. To establish communication on the secure radio,

microphone. Release the press-to-talk switch to listen.

proceed as detailed in paragraph 3-8b(2).

(d) Adjust each applicable ICS box VOL control to

h. To shut down the equipment, perform the

attain a comfortable listening level.

stopping procedure in paragraph 3-9.

(2) Private (PVT) INT. A circuit is provided to

enable any two or more positions to talk privately without

3-8. Operating Procedures

interruption.

Operating procedures for command console AN/ASC-

(a) Set the applicable ICS box transmit-

15A(V) vary according to the equipment configuration.

The equipment is determined by the communication

mission assigned. There are three

3-14