Block Diagram Descriptions of Radio Set AN/GRC-144(V)3

TM 11-5820-695-35

station. This configuration utilizes external equipment to

Transmit Path. Input signals (data from

process the pcm signals at the interface between radio

the DGM and orderwire from the OCU and DLED) are

sets. Two TD-203/U's (radio combiners) are connected

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

back-to-back at the interface between radio sets to

combiner 1A12 in Transmitter, Radio T-1054(P)A/GRC-

process the FROM RADIO and TO RADIO pcm signals.

144(V).

The orderwire input is either two digital

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

orderwire signals (DOW and DVOW) or one analog

nonstandard radio repeater configuration by making the

orderwire signal (AVOW). When operating in the analog

RADIO REPEATER (NONSTANDARD) MODE OF

orderwire mode, the AVOW signal is level adjusted in

OPERATION connections at each set's radio patch

digital data combiner 1A12 and routed to orderwire

panel. The connection bypasses digital data modem

assembly 1A13 where it is processed as described in

1'A12.

Also, the THRU ORDERWIRE cross

paragraph 2-2a(1).

When operating in the digital

connections at the shelter patch panel and the TD-203

orderwire mode, digital orderwire signals are processed

INTERCONNECTS to the external TD-203/U's must be

only in digital data combiner 1A12; orderwire assembly

completed.

Signal processing and transmission is

1A13 processes analog orderwire signals but not digital

identical to that described in c above for the radio

orderwire. The data signal is scrambled, retimed and

repeater configuration, except that the radio-to-cable

regenerated, and the digital orderwire (DOW and

circuits in 1A12 are bypassed and pcm processing is

DVOW) signals are retimed and multiplexed into a

accomplished by the external TD-203/U's. Also, the TD-

single bitstream (CVDOW) in digital data combiner

203 INTERCONNECTS cable connections are used in

1A12. The data and CVDOW (multiplexed DOW and

place of the RADIO REPEATER INPUT AND OUTPUT

DVOW) signals are then combined in a linear summing

cable connections.

For 96 channel (biter)nary)

amplifier and applied to the radio modulator circuits

operation, the applicable controls on Multiplexer TD-

through attenuator 1A3 and af-rf amplifier 1A4. When

203/U must be set for 96 channels.

operating in the analog orderwire mode, this signal is the

data signal only and the analog orderwire signal

(AVOW) comes from orderwire assembly 1A13. From

2-2.1.

Block Diagram Descriptions of Radio Set

this point on, signal processing is the same as that

AN/GRC-144(V)3 (fig. 5-2)

described in paragraph 2-2a(1).

General. Radio Set AN/GRC144(V)3 is

Receive path. The 4.4 to 5.0 GHz rf

the radio link between the cable system and the antenna

receive signal is coupled from the antenna to Receiver,

system and it provides data and orderwire signal

Radio R-1467(P)A/GRC-144(V) through Duplexer CU-

processing and routing. Data signals from the DGM and

1891/GRC, Coupler, Directional CU-1890/GRC, RF

orderwire signals from the orderwire control unit (OCU)

INPUT waveguide connector on the R-1467(P)A/GRC-

and digital line encryption device (DLED) are processed

144(V), and associated waveguide assemblies. The rf

in the transmit direction and transmitted to the distant

input signal is amplified and demodulated in the R-

site. In the receive direction, signals from the distant

1467(P)A/GRC-144(V).

The composite data and

site are processed and routed to the DGM, DLED and

orderwire output signal is coupled to the T-

OCU. The data and orderwire signals require various

1054(P)A/GRC-144(V) through the TRAFFIC OUTPUT

processing (regeneration, descrambling, retiming,

connector on the R-1467(P)A/GRC-144(V), the

multiplexing, demultiplexing); these functions are

TRAFFIC INPUT (RCVR) connector on the T-

performed in digital data combiner 1A12. The circuits of

1054(P)A/GRC-144(V),

and

associated

digital data combiner 1A12 are functionally divided into

interconnecting cable.

The combined data and

cable-to-radio for transmit direction processing and

orderwire signal is applied to the

radio-to-cable for receive direction processing (para 2-

4.1 and 2-5.1).

Change 6 2-4