| 摘要 |
<p>PURPOSE:To eliminate delay time fluctuation caused in the propagation of a synchronizing signal by utilizing a picture synchronizing signal in a television broadcast wave, and detecting the phase difference between said wave and the time signal of a master station and a slave station to synchronize both stations. CONSTITUTION:The master station 4 is provided with a receiver RX receiving the television broadcast wave and a synchronizing signal separator 5 extracting a picture synchronizing signal from the output signal of the receiver, the output of the synchronizing signal separator 5 and a time signal generator 6 is compared by a phase comparator 7 and a phase difference signal (m) is transmitted to each slave station 8. On the other hand, the picture synchronizing signal is led out of a television radio wave in the slave station 8, the signal and the output of the time signal generator 10 of the own station are compared to output a phase difference (n). The phase difference (n) and the phase difference (m) transmitted from the master station are inputted to a phase adjuster 11 and the difference (m-n) of the both is detected and the time signal generator 10 is controlled to make it zero.</p> |
