后面板
PCM話路分析儀（PCM Channel Analyzer） MS371A
廠家: 日本安立
性能指標(biāo)pdf 介紹（英文）
The MS371A1 is the same as the MS371A but also has 64 kb/s co-contradirectional interface.
測(cè)量及維護(hù) M1X 多工器， PABXs 和 PCM 終端機(jī)系統(tǒng)
MS371A/ A1 是一部用于數(shù)字基群傳輸?shù)挠性S多測(cè)試功能的，全面的測(cè)試儀器。它可用來測(cè)量 :
（1） 話音編碼/解碼表現(xiàn)特性
（2） 幀定位/警報(bào)測(cè)試
（3） 比特，編碼和幀誤碼
（4） 時(shí)間抖動(dòng)
（5） 信令等
安立公司的 MS371A/ A1擁有測(cè)量 PCM 系統(tǒng)所必需要大多數(shù)功能，它是一*測(cè)試量儀器， 可以提高測(cè)試效率。PCM 系統(tǒng)的話聲音編碼/解碼的測(cè)試需要更多的時(shí)間和工作量。MS371A/A1 可儲(chǔ)存所有測(cè)試順序步驟及參數(shù)，并可重復(fù)呼叫出來從而大大減小測(cè)量時(shí)間并提高效率。
它具有GPIB控制功能，與MS120A話路選抉器一起使用，可進(jìn)行順序的30個(gè)話路測(cè)試。它還可將測(cè)試結(jié)果與參考數(shù)值進(jìn)行比較，做出判斷并自動(dòng)以"好"或"不好"來顯示結(jié)果。測(cè)量結(jié)果亦可以內(nèi)置的打印機(jī)打印出來，如有所需可外接打印機(jī)打印測(cè)試結(jié)果報(bào)告。
傳統(tǒng)的測(cè)試系統(tǒng)，其測(cè)試結(jié)果通過個(gè)人計(jì)算機(jī)或外置設(shè)備進(jìn)行修改，但MS371A/ A1 可以在內(nèi)部完成并印到外部打印機(jī)上。
功能:
- 自動(dòng)測(cè)量 A-A, A-D, D-A 和 D-D （A:類比；D: 數(shù)位）；
- 幀定位/警報(bào) 測(cè)試
- 誤碼測(cè)試
- 時(shí)間抖動(dòng)測(cè)量
- 信令測(cè)試
- GPIB 控制器
- 內(nèi)置打印機(jī)
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.
Features
- Automatic measurement of A-A, A-D, D-A and D-D （A: analog, D: digital）
This analyzer automatically measures most of the items in ITU-T Recommendations - G.712/713/714. The test sequence and parameters are stored internally, and new test sequences or parameters can be entered by the operator. Also, measurement can be done manually or via GPIB - Frame alignment/alarm test
Frame alignment and alarm tests stipulated in ITU-T Rec. G.704/ O.162 can be performed - Error measurement
Error rate, error count, error second, and % error-free second can be measured by detecting the bit, frame, and code errors - Timing jitter measurement
Jitter modulation is available. Also jitter amplitude and jitter immunity can be measured - Signalling measurement
Manipulation/monitoring of the signalling bit and E&M signalling distortion can be measured - GPIB controller
A GPIB controller function has been incorporated. One to thirty channels can be tested automatically and continuously through the channel selector - Built-in printer
Results are printed out by the built-in printer. In automatic measurement, all results can be printed out or the printout can be limited to results failing the evaluation - External printer
Test results from channels 1 to 30 can be edited according to measuring item and printed out. A report, such as a test performance sheet, can be prepared immediay after the completion of measurements
