Self testing detection system for comparing digital signal trans

Details Self testing detection system for comparing digital signal trans Self testing detection system for comparing digital signal trans

1983-11-14

1986-03-18

Fleming, Michael R.

Excavating

324 73R, G01R 1512

Patent

active

045773181

ABSTRACT:
A plurality of digital signals from a standard reference digital module are compared with the corresponding digital signals from a comparable module-undergoing-test. A select multiplexor receives the pairs of signals from the source modules and conveys the signal pairs to each of a plurality of skew comparison circuits for analysis and error reporting to a maintenance-controller processor. The select multiplexor also permits an internal self-test generator to check out the skew compare circuitry and also permits a mask register, programmed by the maintenance controller processor, to select only those signal pairs which it is desired to analyze, rather than merely checking all the available pairs of lines in the system.

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