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The PCM Signal Monitor is an instrument for in-service monitoring of the two PCM links forming a first order PCM communication system. The instrument is used for testing CCITT recommended 30/31-channel PCM systems at various levels of the exchange hierarc.

Der PCM Signalmonitor dient der ¨¹berwachung der beiden PCM Verbindungen eines PCM Systems erster Ordnung. Es ist zum Test von 30/31- Kanal PCM Systemen nach CCIT ausgelegt. Verschiedene Ebenen mit unterschiedlichen Kodes werden untersucht. Das Ger?t besitzt zwei identische Eing?nge zur ¨¹berwachung und Messung der relevanten Parameter. Die Bit- Rate betr?gt nach CCIT G.703 2048 kbit/s 100ppm. Zur akustischen ¨¹berwachung des Telephonkanals ist ein Lautsprecher eingebaut.

The PCM Signal Monitor is an instrument for in-service monitoring of the two PCM links forming a first order PCM communication system. The instrument is used for testing CCITT recommended 30/31-channel PCM systems at various levels of the exchange hierarchy where different codes are used. Two identical inputs for monitoring * of the signal and alarm conditions; * of frame alignment signal error rates * telephone channel signal (8bits) * the signalling (4bits) * the channel time slot 0 and 16 and for measuring of the * frequency of the incoming bitstream * telephone channel signal peak code * telephone channel signal analog level * analog output of the telephone channel signal * audible output of the telephone channel signal Various LEDs monitor conditions and detect errors Bit rate of the input channel is: 2048 kbits/s 100 ppm; built- in speaker for supervising the telephon channel.