| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synchronizer capable of conducting a test in a short time by a receiver receiving and synchronizing data used in a mobile-body FM multiplex broadcasting system. <P>SOLUTION: In the synchronizer 10, a switching circuit 14 is controlled by a CPU 12, and either of final-stage outputs 110 shifted by a receiving data 102 and a shift register 16 is changed over and input to the front stage of the shift register 16 in the case of a synchronous test. In the synchronizer 10, the shift register 16 can shift test data 108 in response to a clock signal 104 by writing the test data 108 to the shift register 106 in a short time by the CPU 12. In the synchronizer 10, data 108 for a frame synchronizing test, which removes the data unnecessary for frame synchronous detection, is used, and the count value 140 of a block counter 26 can be controlled in conformity with the data in the case of the frame synchronization test, thus conducting block synchronizing, frame synchronous test and operation confirmation of each circuit in the short time. <P>COPYRIGHT: (C)2009,JPO&INPIT |
