| 摘要 |
PURPOSE:To attain synchronous detection and the restoration of information by preparing a frame synchronization detecting signal consisting of one pattern on the reception side and detecting a frame synchronization, and resetting a circuit for descrambling the redeived information, by this detecting signal. CONSTITUTION:A descramble means is an asynchronous type descramble circuit 12, and constituted so that an output signal from an EOR gate 6 is not inputted to a descramble signal generator 7, and its own descramble signal generator 7 outputs a descramble signal. Also, this descramble signal generator 7 is reset by a reset signal 15. Accordingly, whenever this reset signal 15 is supplied, a signal outputted from the descramble signal generator 7 goes to the same pattern. In such a way, by allowing this descramble signal to correspond in advance to a scramble signal of a transmission side, an original signal of the transmission side can be restored to a terminal 13. |
