| 摘要 |
. The information symbol reception device has a traffic switching unit (138) which is adapted such that when closed, allows the flow of information symbols between the symbol reception device and a communication control mechanism. In a closed position, the information symbol traffic between the symbol receiver and the communication control is interrupted. . There is a control mechanism which detects information symbols and switches the information flow to the communications control unit when the symbols are present, and otherwise opens the switch. The detector also detects the end of the broadcast signal and opens the information symbol switch. |
