The MS371A1 is the same as the MS371A but also has 64 kb/s co-contradirectional interface.
测量及维护 M1X 多工器， PABXs 和 PCM 终端机系统
MS371A/ A1 是一部用于数字基群传输的有许多测试功能的，全面的测试仪器。它可用来测量 :
安立公司的 MS371A/ A1拥有测量 PCM 系统所必需要大多数功能，它是一全方位测试量仪器， 可以提高测试效率。PCM 系统的话声音编码/解码的测试需要更多的时间和工作量。MS371A/A1 可储存所有测试顺序步骤及参数，并可重复呼叫出来从而大大减小测量时间并提高效率。
传统的测试系统，其测试结果通过个人计算机或外置设备进行修改，但MS371A/ A1 可以在内部完成并印到外部打印机上。
Measurement and Maintenance of M1X Multiplexers, PABXs and PCM Terminal Systems
The MS371A/A1 is an overall measuring instrument 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
(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 require 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 channels 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. Another 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.
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