Table 2-6. Off-Line Self-Test

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

(1)

To run the off-line self-test, do the following steps in order:

(a)

Put the ON/OFF switch in the ON position.

(b)

Put the FUNCTION select switch in the SELF TEST position.

(c)

Put the ON LINE/SELF TEST switch in the START position (down). While holding the switch down

notice that all indicators come on. When you let the switch go, it will return to the center position and the

off-line self-test will start.

(2)

The off-line self-test runs 19 individual tests. The test numbers and their functions are listed in table 2-6.

Table 2-6. Off-Line Self-Test

Test

Number

Function

T01

Initialization

T02

Ram Test

T03

Prom Test

T04

Encoder Output Test

T05

Interleaver Output Test

T06

Encoder SEnable/4 Test

T07

Channel Output Test

T08

Deinterleaver Output Test

T09

Decoder Output Test

T10

Feedback Decoder/Deinterleaver Test

T11

Normalize/Threshold/Channel Error Test

T12

Error Rate Counter Test

T13

Data Rate Ranger Test

T14

On-Line Fault Detection Test

T15

Time-Out Counter Test

T16

Power Supply Test

T17

Display and Control Test

T18

Mode C Errors

T19

Operator Interface Test

(3)

As each of the 19 individual tests begin, the ERROR RATE COUNTER shows you the test number that is

being run by displaying T01 through T19. The 19 tests run in order, one after the other until T19 is shown on

the ERROR RATE COUNTER or until a problem is found.

(4)

If a problem is found, NGO is shown on the ERROR RATE COUNTER for 5 seconds followed by BDn where

n represents the number of the bad circuit card assembly as follows:

2-15