Measurement and Maintenance of M1X Multiplexers, PABXs and PCM Terminal Systems

The MS371A/A1 is an overall measuring i nstrument with many measuring functions for digital primary hierarchy transmission. It can be used to measure (1) voice encode/decode performance characteristics, (2) frame alignment/alarm test, (3) bit, code, and frame errors, (4) timing jitter, and (5) signalling, etc.

The Anritsu MS371A/A1 has most of the functions required to measure PCM systems. It is an all-purpose measuring instrument designed to improve measurement efficiency. Measurements of PCM voice encode/decode performance r equire much time and labor. The MS371A/ A1 stores the measurement sequence and parameters in its internal memory and makes automatic measurements to markedly improve efficiency. It has a GPIB control function, which will allow measurements of 30 chan nels in one sequence when combined with channel selector. It also compares the measured results to a reference value, judges them, and displays GOOD or NO GOOD automatically. The measured results can then be printed out on the built-in printer. Anoth er special feature is that the report of the measured results can also be printed out an external printer.

In conventional measuring systems, the results are edited with a personal computer or some other external device. However, the MS371A/ A1 performs this function internally and prints out to the external printer. This unique function can instantaneously prepare test performance sheets during installation and report the results of periodic maintenance without the need for manual or computer evaluation.