Transmit Path - TM-11-5820-695-350033

TM 11-5820-695-35

and the control and alarm signals between assemblies in

3. In the radio repeater mode of operation,

the T-1054(P)/GRC-144(v). The processing of signals

the CABLE TO RADIO MODEM indicator is

within complex assemblies such as digital data modem

not lighted.

1A12, orderwire assembly 1A13, and electrical

frequency synthesizer 1A14 are explained in subsequent

Transmit Path. The transmit (cable-to-

paragraphs.

The radio patch panel in the T-

radio) signal path through the T-1054(P)/GRC-144(V) is

1054(P)/GRC-144(V) permits connecting Radio Set

shown with the FROM CABLE signal entering the T-

AN/GRC-144 in any one of four configurations. Figure

1054(P)/GRC-144(V) on the left and the RF OUTPUT

5-6 illustrates the connections for the cable terminal

signal leaving on the right-hand side of figure 5-6.

configuration

(CABLE

TERMINAL

OPERATION

indicator on radio patch panel is lighted). Both the

(1) The FROM CABLE Input (a

radio-to-cable circuits and the cable-to-radio circuits in

combined pcm, ow, and de signal) is applied to the

digital data modem 1A12 are used in the cable terminal

cable to-radio circuits of digital data modem 1A12. The

configuration. In the other configuration, the radio patch

CABLE TO RADIO MODEM indicator on meter panel

panel is used to connect external equipment in the

assembly 1A15A8 and a remote traffic in indicator are

signal path and to bypass the cable-to-radio circuits in

controlled by the cable-to-radio circuits in 1A12 through

digital data modem 1A12 or to completely bypass digital

the radio patch panel. For normal input pcm traffic

data modem 1A12 (para 2-2b, c, and d). The following

conditions, the CABLE TO RADIO MODEM and the

subparagraphs describe the transmit (cable-to-radio)

traffic in indicators are lighted green. If an input pcm

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

traffic failure is detected by the cable-to-radio circuits in

T-1054(P)A/GRC-144(V). The control and alarm signals

1A12, the CNTRL ALARM and the external traffic in

in the T-1054(P)/GRC-144(V) are also described.

indicators light red. The CABLE TO RADIO MODEM

indicator lights red only when a functional failure exists

NOTES

in 1A12 and actual pcm traffic is present. If pcm traffic

is not present, this alarm is inhibited (remains green)

In both radio repeater modes of

even if a functional failure exists. The pcm, ow, and dc

operation and in the cable terminal

portions of the input signal are separated in the cable-to-

radio circuits.

The cable-to-radio circuits reshape,

(nonstandard) mode, the external traffic in

retime, and convert the pcm train to a level compatible

and traffic out indicators are not lighted.

with the radio circuits. The regenerated pcm output (to

radio pcm) is routed through the radio patch panel to

In both nonstandard modes of

attenuator assembly 1A3. The ow signal is amplified in

operation, the CABLE TO RADIO MODEM

the cable-to-radio circuits. The amplified ow signal

and RADIO TO CABLE MODEM indicators

output (thru ow rec) is routed through the radio patch

are not lighted.

panel to orderwire

Change 6 2-4.2