| 摘要 |
<p>PURPOSE:To eliminate the out of synchronism in a reception section by selecting the sequence of transmission from plural fixed pattern generating circuits by means of a control counter circuit whose initial value is set optionally. CONSTITUTION:A fixed pattern generated in each fixed pattern generating circuit 1 is selected by a selection circuit 2 and outputted from an output terminal 5 as a frame pattern. A setting circuit 4 generates an address of a frame pattern which would have been sent at present but for the package exchange depending on the time used for the exchange with a frame pattern sent just before the package exchange in the package exchange within a protection time of a frame period circuit of the reception section and gives its address to a control counter circuit 3. Then the counter circuit 3 controls the selection circuit 2 to control the order of the fixed pattern. Thus, the out of synchronism in the reception section is avoided.</p> |
