Block Diagram Descriptions of Radio Set AN/GRC-144(V)4

TM 11-5820-695-35

AS-3398/GRC-144(V), K-band) are used. Waveguide

radio-to-cable circuits of digital data combiner 1A12

switches route the transmit and receive signals to/from

through orderwire assembly 1A13 and the radio patch

the appropriate antenna, according to the operating

panel. The data and orderwire signals are separated in

band. The transmitter (T-1054(P)A/GRC-144(V) and

the radio-to-cable circuits. The scrambled data signal is

receiver (R-1467(P)A/GRC-144(V) are the same as

reshaped, retimed, descrambled and reformatted for

those used with Radio Set AN/GRC-144(V)3. When

cable system compatibility, and routed to the DGM.

operating in C-band, T-1054(P)A/GRC-144(V) is routed

When operating in the analog orderwire mode, the

by waveguide switch 1 through diplexer CU-1891/GRC,

separated orderwire signal (recovered ow) and an

waveguide switch 2, and Directional Coupler CU-

orderwire sensing signal (recovered ow sense) are sent

1890/GRC into the receiver. When operating in K-band,

back from the radio-to-cable circuits of 1A12 to 1A13

the transmit rf output signal is routed through waveguide

through the radio patch panel. For normal conditions,

switch 1 and Adapter UG-1883/GRC into Converter-

the recovered ow sense signal, generated in the radio-

Multiplier CV-3633/GRC-144(V). In the CV-3633/G(C-

to-cable circuits, keeps a relay in 1A13 energized

144(V), the transmit signal is up converted to the K-band

allowing the recovered ow signal to be amplified and

range and routed to the K-band antenna. The receive

distributed to the remote phone, Handset H-156/U, the

path is from the K-band antenna to CV-3633/GRC-

loudspeaker, and back to 1A12 (thru ow send). The thru

144(V), where the signal is down converted to the C-

ow send signal is routed to the OCU. If a data traffic

band range. The C-band output of CV-3633/GRC-

failure is detected in the radio-to-cable circuits of 1A12,

144(V) is routed through Adapter UG-1883/GRC,

the recovered ow sense signal causes the relay in 1A13

waveguide switch 2, and Directional Coupler CU-

to become deenergized.

For this condition, the

1890/GRC to the receiver. When operating in either C-

orderwire

signal

from

Receiver,

Radio

R-

band or K-band, the transmit and receive paths in the

1467(P)A/GRC-144(V) is routed through contacts of the

transmitter (T-1054(P)A/GRC-144(V) and the receiver

relay and is amplified and distributed to Telephone Set

(R-1467(P)A/GRC-144(V) are the same as those

TA-312/PT, Handset H-156/U, the loudspeaker, and to

described for Radio Set AN/GRC-144(V)3 (para 2-2.1).

1A12 (thru ow send). Thus, orderwire communication is

Refer to section VI of this chapter for functional

maintained when a data traffic failure occurs. When

descriptions of Converter-Multiplier CV-3633/GRC-

operating in the digital orderwire mode, the separated

144(V) circuits.

orderwire signal (referred to above) is the CVDOW

signal. This signal is demultiplexed into DOW and

DVOW signals in digital data combiner 1A12. The

2-3.

Overall Block Diagram Description of

DOW and DVOW signals are then routed to the OCU

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

and DLED.

(fig. 5-6)

2-2.2.

Block Diagram Descriptions of Radio Set

Transmitter, Radio T-1054(P)/GRC-144(V) operates in

AN/GRC-144(V)4 (fig. 5-2.1)

the 4.4 to 5.0 GHz frequency range with a continuous

wave (cw) power output of 250 milliwatts nominal.

Radio Set AN/GRC-144(V)4 operates in either of two

Figure 5-6 illustrates the major signal flow (heavy lines

bands: 4.4 to 5.0 GHz 1 (C-band) or 14.4 to 15.0 GHz

on the diagram)

(K-band). Two antennas (AS-1425/GRC C-band and

Change 6 2-4.1