Orderwire Assembly 1A13 Signal Distribution Block Diagram Description-continued

TM 11-5820-695-35

The signal output of peak limiter A is distributed as

tion, Radio Set AN/GRC-144, and terminal equipment

follows:

are shown.

Input orderwire signals, recovered

orderwire, orderwire (pcm bypass), the remote

(1) To the remote telephone through IC

telephone (Telephone Set TA-312/PT), and Handset H-

amplifier A2 and filter FL2 on 1A13A3, and hybrid

156/U are shown entering the orderwire circuits on the

transformer lA13A7TB1T1.

left-hand side of the diagram. Output orderwire signals,

(2) To the through orderwire transmit (TO

to Handset H-156/U, through orderwire transmit to

CABLE) through IC amplifier A5 on lA13A5, and IC

cable, to remote telephone, and to transmitter, are

amplifier Al, filter FL1, and transformer T1 on 1A13A3.

shown leaving the orderwire circuits on the righthand

(3) To Transmitter, T-1054(P)/GC-144(VY).

side of the diagram. The through orderwire receive

through IC amplifier A5 and A4, filter FL1, and

(FROM CABLE) input signal is received by cable from

transformer T1 on lA13A5.

the terminal equipment and the through orderwire

d. Assume that the through orderwire receive

transmit (TO CABLE) output signal is sent by cable to

signal is applied to the orderwire circuits. The signal is

the terminal equipment. The recovered orderwire or

distributed as follows:

orderwire (pcm bypass) input signal is received by the

(1) To the loudspeaker through transformer

antenna and Receiver, R-1467(P)/GIRC144(V)' from the

T1 and IC amplifiers Al and A2 on lA13A4, the speaker

distant radio station and the transmitter orderwire output

volume control on meter panel assembly lA15A8, and IC

signal is sent by Transmitter, T-1054 (P)/GC:-144(V),

amplifier A2 on lA13A2.

and antenna to the distant radio station. The internal

(2) To Handset tI-166/U through transformer

orderwire circuit connections are such that a signal

T1, IC amplifiers Al and A2, and filter FL1 on lA13A4.

originating at one of the four inputs is distributed to the

other three outputs but not to the associated output. For

(3) To Transmitter, Radio T-1054/GRC-144

example, the through orderwire receive (FROM CABLE)

through transformer IA13A4Tl, and IC amplifier A4, filter

input signal is distributed to the transmitter orderwire,

FL1, and transformer T1 on 1A13A5.

Handset H-156/U, and the remote telephone outputs but

(4) To the remote telephone through

not to the through orderwire transmit (TO CABLE)

transformer T1 and IC amplifier Al on 1A13A4, IC

output.

amplifier A2 and filter FL12 on lA13A3, the hybrid

b. To illustrate signal distribution through the

transformer lA13A7TBlT1.

orderwire assembly, assume that a signal is applied

e. For normal operating conditions, relay K1 on

from remote telephone output. The 3ignal passes

lA13A3 is energized, allowing the recovered orderwire

through hybrid transformer lA13A7TBlTl and peak

signal (the orderwire signal from the distant radio

limiter B (integrated circuit A3) on 1A13A5 and is

station) to enter the orderwire circuits. However, if the

distributed as follows: (1) To the loudspeaker through

recovered orderwire sensing signal is lost (pcm alarm

IC amplifier A2 on 1A13A4, the speaker volume control

condition), relay K1 becomes deenergized and the

on the meter panel and IC amplifier A2 on lA13A4, the

orderwire (pcm bypass) signal enters the circuits to

speaker volume control on the meter panel and IC

maintain orderwire communications. In either case, the

amplifier A2 on lA13A2.

recovered orderwire signal or the orderwire (pcm

(2) To Handset H-156/U receive through IC

bypass) signal passes through contacts of relay K1 on

amplifier A2 and filter FL1 on 1A13A4.

1A13A3 and is distributed as follows:

(3) To Transmitter, T-1054(P)/GRC-144(V)

(1) To the loudspeaker through IC amplifiers

through IC amplifiers A5 and A4, filter FL1 and

Al and A2 on 1A13A4, the speaker volume control on

transformer T1 on 1A13A5.

the meter panel, and IC amplifier A2 on lA13A2.

(4) To through orderwire transmit (TO

(2) To Handset H-156/U through IC amplifiers

CABLE) through IC amplifier A5 on lA13A5, and IC

Al and A2, and filter FL1 on lA13A4.

amplifier Al, filter FL1, and transformer T1 on lA13A3.

(3) To the remote telephone through IC

c. Assume that a signal is applied from Handset H-

amplifier Al on 1A13A4, IC amplifier A2 and filter FL2 on

166/U output. The signal is applied to peak limiter A

lA13A3, and hybrid transformer lA13A7TBlTl.

(integrated circuit A2) and to sidetone amplifier Q2 on

1A13A5. The output of sidetone amplifier Q2 is applied

to the handset's receive element to provide sidetone.

Change 6 2-24.16