| 摘要 |
<p>PURPOSE:To compensate a prescribed frequency of word synchronizing pulse reproducing and stop the compensation function to respond with a new message immediately when word synchronizing pulses are extracted continuously at a prescribed interval, in the data transmission system. CONSTITUTION:The data format of the data transmission system is constituted with bit synchronizing part B having a pattern to extract clocks, word synchronizing part W having a specific pattern to indicate data arrival, and data part D including data to be transmitted and consists of T-number bits as the whole, and word synchronizing pulse WSF is detected from word synchronizing part W. When the first word synchronizing pulse WSF is extracted from the message, output PE is generated from counters 1 and 2 by clock pulse CPO and CP1 after the 1/4 period of CPO, and output PE is generated similarly by next synchronizing pulse SP, and FF 4 is set to obtain the first reproducing word synchronizing pulse SP from gate 10, and FF4 holds set even if next synchronizing pulse WSF is not extracted.</p> |
