Receive path - TM-11-5820-695-350029

TM 11-5820-695-35

from Receiver, Radio R-1467/GRC-144 is routed

and are applied to the modulator circuits as a combined

through contacts of the relay and is amplified and

baseband signal.

The combined baseband signal

distributed to Telephone Set TA-312/PT, Handset H-

frequency modulates a 1.50 MHz carrier in the

156/U, the loudspeaker, and to 1A12 (thru ow send).

modulator circuits. This signal is translated up to the 4.4

Thus, orderwire communication is maintained when a

to 5.0 GHz band and is applied to the antenna through

pcm traffic failure occurs.

the RF OUTPUT waveguide connector on the T-

1054/GRC-144, Switch, Waveguide SA-1679/GRC,

Nonstandard

Cable

Terminal

Diplexer CU-1891/GRC, and associated waveguide

assemblies. A portion of the rf output from the T-

Configuration (fig. 5-3). In the nonstandard cable

1054/GRC-144 can be applied to Receiver, Radio R-

terminal configuration, the AN/GRC-144 is the radio link

1467/GRC-144 through the radio test set, the TEST

between the cable system and the antenna system;

OUTPUT (RCVR) connector on the T-1054/GRC-144,

however, this configuration utilizes external equipment

and Coupler, Directional OU-1890/GRC. The radio test

to process the pcm signals at the interface between

set provides a receiver test signal to check the operation

cable and Radio Set AN/GRC-144. Multiplexer TD-

of Radio Set AN/GRC-144.

203/U (radio combiner) and Multiplexer TD-204/U (cable

combiner) provide the interface between cable and

(2) Receive path. The 4.4 to 5.0 GHz rf

Radio Set AN/GRC-144, by regenerating and retiming

receive signal is coupled from the antenna to Receiver,

the pcm signals. Radio Set AN/GRC-144 is connected

Radio R-1467/GRC-144 through Diplexer CU-191/GRC,

in the nonstandard cable terminal configuration by

Coupler, Directional OU-1890/GRC, RF INPUT

making the CABLE TERMINAL (NONSTANDARD)

waveguide connector on the R-1467/GRC-144, and

MODE OF OPERATION connection at the radio patch

associated waveguide assemblies. The rf input signal is

panel in Transmitter, Radio T-1054/GRC-144. This

amplified and demodulated in the R-1467/GRC144.

connection bypasses digital data modem 1A12. Two

The composite pcm and orderwire output signal is

Multiplexer TD-204/U's with separate cable systems

coupled to the T-1054/GRC-144 through the TRAFFIC

must be connected to Multiplexer TD-203/U for 96

OUTPUT connector on the R-1467/GRC-144, the

channel (biternary) operation. The transmit (cable-to-

TRAFFIC INPUT (RCVR) connector on the

radio) and receive (radio to-cable) signal paths through

TJ1054/GRC-144, and an associated interconnecting

the external pcm processing equipment and the

cable. The combined pcm and orderwire signal is

AN/GRC-144 are described in the following

applied to the radio-to-cable circuits of digital data

subparagraphs.

modem 1A12 through orderwire assembly 1A13 and the

radio patch panel. The pcm and orderwire signals are

(1) Transmit path. The cable system

separated in the radio-to-cable circuits. The distorted

input signal consisting of pcm and orderwire is applied

pcm signal is reshaped, retimed, and reformatted for

to the FROM CABLE input of the TD-204/U (cable

cable system compatibility. The separated orderwire

combiner) where the pcm and orderwire signals are

signal (recovered ow) and an orderwire sensing signal

separated. The pcm signal is reshaped and retimed and

(recovered ow sense) are sent back from the radio-to-

applied to the TD-203/U (radio combiner). The pcm

cable circuits of 1A12 to 1A13 through the radio patch

signal is converted to a level compatible with Radio Set

panel. For normal conditions, the recovered ow sense

AN/GRC-144 and is coupled from the TD-203/U to

signal, generated in the radio-to-cable circuits, keeps a

attenuator assembly 1A3 in the T-1054/GRC-144

relay in 1A13 energized allowing the recovered ow

through the TO RADIO connectors and associated cable

signal to be amplified and distributed to the remote

and the radio patch panel. The FROM CABLE orderwire

phone, Handset H-166/ U, the loud speaker, and back to

signal is routed (send ow) to 1A13 through the PATCH

1A12 (thru ow send). The thru ow send signal is

THRU connector on the TD-204/U, the HANDSET

combined with the regenerated pcm signal and the cable

connector on the T-1054/GRC-144, and the associated

direct current in the radio-to-cable circuits of 1A12. The

cable. The send voice signal is amplified in 1A13 and

combined pcm/orderwire/dc signal is applied to the

distributed to Telephone Set TA312/PT, thru ow send

cable system through the TO CABLE connector on the

terminals, Headset Microphone H-91A/U on Multiplexer

T-1054/GRC-144. If a pcm traffic failure is detected in

TD-204/U, and to attenuator assembly 1A3 (to radio

the radio-to-cable circuits of 1A12, the recovered ow

ow).

sense signal causes the relay in 1A13 to become

deenergized. For this condition, the orderwire signal

Change 6 2-2.1/(2-2.2 blank)