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PCM30D传输系统能够以数字传输方式传输准同步的64kb/s数据信号。采用正一零一负塞入技术,可用2048kb/s数字信号的传输容量传输64kb/s的数据信号。作者对所用的塞入技术和脉冲帧进行了深入探讨之后,论述了比特速率匹配和时钟提取问题,其中也涉及到所出现的抖动问题。此外,还针对30路数据复接设备DSM×64K/2和1-4路的数据接续设备DSE64K/2,介绍了设备的技术水平。
PCM30D transmission system can transmit quasi-synchronous 64kb / s data signals in digital transmission mode. Using positive zero one negative plug technology, the transmission capacity of 2048kb / s digital signal transmission 64kb / s data signal. After in-depth discussions of the stuffing techniques and impulse frames used, the authors dealt with bit rate matching and clock extraction problems, which also involved jitter problems that occurred. In addition, the technical level of the equipment is also introduced for DSM × 64K / 2 of 30-channel data multiplexing device and DSE64K / 2 of 1-4-channel data connecting device.