Equipment Data - TM-11-5895-1179-130013

TM 11-5895-1179-13 EE132-EA-OMP-010/E106 KY883 * TO 31S1-2GSC-161

b. Plug-In-Circuit Card Assembly (CCA) Features. Plug-in-circuit card assemblies Al through A3 perform the

encoding and decoding functions. The plug-in power supply circuit card assembly A4 provides the plus and minus five-volt

supplies.

g. Front Panel Assemblv Features. The front panel assembly contains all controls and indicators for operating and

testing the encoder-decoder. The fuseholder with blown fuse indicator is also located on the front panel assembly.

Controls and indicators are listed in table 2-1. The display and control circuit card assembly is attached to the back of the

front panel assembly. The front panel assembly is hinged at the bottom to allow access to the display and control circuit

card assembly, and the four plug-in-circuit card assemblies. The plug-in-circuit card assemblies are removed through the

front.

d. Connector Features. The input/output connectors (A5A1J5 and A5A1J6) and the monitor connector (A5A1J7) are

mounted on the backplane circuit card assembly which is part of the rear panel assembly (figure 1-3). The two I/O

connectors are identical which allow either to be connected to the modem. The backplane circuit card assembly contains

the four receptacles (A5AlJl through A5A1J4) for the plug-in-circuit card assemblies. The power connector A5AlJ13 is

mounted on the rear panel assembly.

e. Bottom Panel Assembly Features. The electronic signal is located on the bottom panel assembly. Discrete parts

associated with the power supply, i.e., the power transformer, power inductor, filter capacitor A7C1, and diodes A7CR1,

A7CR2, and A7CR4 are also located on the bottom panel assembly as well as A7CR3 and A7C2 for the 28 Vdc fan circuit.

Fuse clips, for a spare fuse, are located on the bottom panel assembly.

1-11.

Equipment Data

Equipment data and technical characteristics are listed and defined in table 1-4.

1-12.

Encoder-Decoder Interface

Interface signals are differentially driven with balanced current 75107/75109 line receiver/driver characteristics, with the

exception of the 2 remote mode control lines, which are TTL compatible, either open-collector, or active pull-up.