Table 5-1. Card Cage Assembly CCA Functions

TM 32-5811-024-14&P

Table 5-1. Card Cage Assembly CCA Functions

CCA

Function

Processor display

Provides octal and binary display LEDs to display

CCA A1

key unit-under-test digital processor bus data

received via digital processor test set CCAs A3

and A4.

AGE display

Provides octal and binary display LEDs to display

CCA A2

the responses of the unit under test to digital

processor test set stimuli. CCA A5 transfers unit-

under-test antenna and delay line switching command

data (LASO thru LAS11 and RDLO thru RDL11, respec-

tively) while CCAs A8 and A6 store the DFDO thru

DFD15 input to CCA A2. As a result, the OCTAL

DISPLAY on CCA A2 may show the response of a

communication processor control-indicator interface

test (via CCA A8) or the response of a serial

interface test (via CCA A6). Front-panel switch

S7 (SER. INT. CONTROL CP STATUS/SER INT) selects

either CCA A8 or CCA A6 to drive the DFDO thru

DFD15 lines.

Display storage

Addresses the unit-under-test digital processor dis-

CCA A3

play multiplexer CCA via the MUXO thru MUX2 lines and

stores the resulting DMO thru DM7 words for display

on CCA Al. In addition, the display storage CCA

provides a 500-kHz clock used by RF processor simu-

lator CCA A5.

Diagnostic buffer

Transfers address (XADO thru XAD15) data from unit-

CCA A4

under-test digital processor to diagnostic ROM CCAs

All and A12 and to CCA Al (via the RADO thru RAD15

lines). CCA A4 is also used to transfer the result-

ing diagnostic ROM instruction bits (INO thru IN23)

to the unit-under-test instruction bus via the RINO

thru RIN23 lines.

RF processor simulator

Tests df control servo loop by responding to input

CCA A5

delay line preset (DLP) binary commands from the

unit under test with proportional ANALOG output

signals. The RF processor simulator CCA also

formats, then routes the ASC, DLP command data to

CCA A2 for display via the RDLO thru RDL11 and

LASO thru LAS11 lines. To perform its functions,

CCA A5 requires a 500-Hz input from CCA A3.

Serial interface test

Tests the ability of a unit-under-test serial inter-

CCA A6

face CCA to perform the interface function. CCA A6

converts the test word received from the digital

processor test set front-panel COMMAND switches

5-3