| 摘要 |
<p>PURPOSE:To attain phase synchronization between a master station and each slave station without using an ultrahigh speed clock by using a data clock equal to transmission speed as a clock for transmission phase shift and setting the pulse width of a monitor bit to be several times of the data clock period or above. CONSTITUTION:A low speed data clock DCL is used in a phase synchronizing section 40. The pulse width of a monitoring bit M is selected to be several times of the period of the data clock DCL or above, the monitoring bit M is coded via a multiplex section 21, sent to a line T and reaches the master station 1. The phase synchronization by the data clock DCL is only the frame synchronization, but the bit synchronization by a preamble PR is taken under block multiplex. Thus, the phase synchronization is taken between the master station 1 and each slave station without using the ultrahigh speed transmission phase shift clock.</p> |
