Table 5-1. Card Cage Assembly CCA Functions

TM 32-5811-024-14&P

Table 5-1. Card Cage Assembly CCA Functions - Continued

CCA

Function

Serial interface test

into the appropriate format for transfer to the unit

CCA A6 (continued)

under test. CCA A1A6 then converts the unit-under-test

response word into the necessary format for transfer

to OCTAL DISPLAY of CCA A2. The serial interface

test CCA has access to the OCTAL DISPLAY (via DFDO

thru DFD15 lines) only when the front-panel CP STATUS/

SER INT switch (S7) is in the SER INT position. (See

figure FO-4.)

Logic control

Functions with lamp driver CCA A8 to test the ability

CCA A7

of the communication processor to interface with its

control-indicator. CCA A7 responds to digital

processor test set front-panel switching by serially

transferring a 32-bit test word to the unit under

test.

Lamp driver

Functions with logic control CCA A7 to test the

CCA A8

ability of the communication processor to interface

with its control-indicator. CCA A8 receives a

serial 16-bit word, which is the unit-under-test

response to the 32-bit test word applied by CCA A7.

CCA A8 then formats the input for transfer to the

OCTAL DISPLAY. The lamp driver routes the formulated

response word to the OCTAL DISPLAY via the DFDO thru

DFDI5 lines. For CCA A8 to have exclusive access

to these lines, the front-panel CP STATUS/SER INT

switch (S7) must be set to the CP STATUS position.

(See figure FO-5.)

Control-indicator test

Tests the communication processor control-indicator.

CCA A9

CCA A9 accepts an input 32-bit word from the control-

indicator switches and loads this word into a matrix

logic circuit. The output of the matrix logic, a 16-

bit response word, is then transferred back to the

control-indicator to light the status lamp. A suc-

cessful test is executed when the control-indicator

switching arrangement is interpreted by CCA A9 matrix

logic into a response word that lights the appropriate

control-indicator status lamp. (See figure FO-6.)

Transceiver test

Functions with the digital processor test set front-

CCA A10

panel TRANSCEIVER CONTROL switches to test the ability

of the communication processor transceiver I/O module

to encode and decode a serial binary data stream. In

addition, CCA A10 provides a 10-Hz signal that exer-

cises the data link transceiver AGC detection circuits

of the communication processor transceiver I/O

5-4