Standard Radio Repeater Configuration

TM 11-5820-695-35

panel lights when the RADIO REPEATER MODE OF

Since the thru ow send output terminals and the thru ow

OPERATION connection is completed. Signal paths

rec input terminals of 1A11 are not used in this

through the AN/GRC-144's are described in the

configuration, they are terminated in 620 ohms. The

following subparagraphs.

signal distribution within 1A13 is the same as shown in

figure 5-2 for the cable terminal configuration. Also, the

(1) Radio set A to radio set B signal

remainder of the transmit signal path from attenuator

assembly 1A3 to the antenna is the same as that

path. The rf signal from distant radio station A is

described in a(1) above for the cable terminal

received by antenna system A and is applied to

configuration.

Receiver, Radio R-1467/GRC-144 in radio set A. The rf

receive signal is demodulated and amplified in the R-

(2) Receive path. The receive path

1467/GRC-144. The resulting output signal (combined

pcm and orderwire) is applied to the radio-to-cable

from the antenna to the input of orderwire 1A13 is the

circuits in 1A12 of Transmitter, Radio T-1054/GRC-144

same as described in a(2) above for the cable terminal

by the orderwire assembly 1A13 and the radio patch

configuration. The combined pcm and orderwire output

panel. The pcm and orderwire signals are separated in

of 1A13 is applied to the TD203/U through the radio

the radio-to-cable circuits. The pcm signal is reshaped

patch panel, the FROM RADIO connectors on the T-

and retimed and is applied to attenuator assembly 1AB3

1064/GRC-144 and the TD-203/U, and the associated

of radio set B through the RADIO REPEATER OUTPUT

cable. The distorted FROM RADIO pcm signal is

connector on radio set A, the shelter patch panel, the

separated from the orderwire signal. Then it is reshaped

RADIO REPEATER INPUT connector on radio set B,

and retimed and applied to the TD-204/U where it is

and the radio patch panel in radio set B. The recovered

reformatted for cable system compatibility.

The

ow and recovered ow sense signals are fed back to

separated orderwire signal (recovered ow) and the

1A13 through the radio patch panel. The recovered ow

orderwire sensing signal (recovered ow sense) are fed

signal is amplified and distributed within 1A13 to

back from the TD203/U to 1A13 in the T-1064/GRC-144

Telephone Set TA312/ IPT, Handset H-166/U, the thru

through the RECOVERED ORDERWIRE connector and

ow send output terminals, and the loud speaker (w(2)

associated cable and the radio patch panel. The

above). The thru ow send output of 1A13 in radio set A

recovered ow signal is amplified and distributed to the

is applied to the thru ow rec input of radio set B through

Converter, Telegraph Telephone Signal CV-425/,U, the

the radio patch panel and the THRU ORDERWIRE send

thru ow send terminals, Headset-Microphone H-91A/U,

connection in radio set A, the shelter patch panel, and

and the loud speaker. The receive orderwire output (rec

the THRU ORDERWIRE receive connection in radio set

voice) is coupled to TD-204/U through the HANDSET

B. The thru ow rec input to 1A13 in radio set B is

connector on T-1064/GRC-144, the PATCH THRU

amplified and distributed. The to radio ow output of

connector on the TD-204/U, and the associated cable.

1A13 is applied to attenuator assembly 1A3 in radio set

The ow signal and the reformatted pcm signal are then

B. The remainder of the transmission path from 1A3 to

applied to the cable system through the TO CABLE

antenna B is identical to that previously described in

connector on the TD-204/U.

a(1) above. The rf is transmitted from antenna B to

distant radio station B.

Standard Radio Repeater Configuration

(fig. 5-4). In the standard radio repeater configuration,

(2) Radio set B to radio set A signal

two AN/GRC-144's are connected back-to-back to

path. The rf signal from distant radio station B is

function as a radio relay station. Pcm signal processing

received by antenna B, processed by radio set B, and

is required at the interface between radio sets. This is

transmitted to distant radio station A through the radio

accomplished internally by digital data modem 1A12 in

circuits in radio set A and antenna A. Signal processing

each AN/GRC-44. For radio repeater operation, only

and transmission is identical to that described in (1)

the radio-to-cable circuits in each digital data modem

above except in the reverse direction.

are utilized. The two AN/GRC-144's are connected in

the radio repeater configuration by making the RADIO

Nonstandard

Radio

Repeater

REPEATER MODE OF OPERATION connections, at

the radio patch panel of each AN/GRC-144 and the

Configuration (fig. 5-5).

In the nonstandard radio

appropriate cross connections at the shelter patch panel.

repeater configuration, two AN/GRC-144's are

The RADIO REPEATER indicator on each radio patch

connected back-to-back to function as a radio relay

2-3