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帧同步机主要是用来解决电视播出系统中非同步信号的切换问题.过去,为了对非同步信号进行切换,必须采用跟踪锁相的办法迫使它们同步.主要有两种工作方式,一种是台从锁相,就是从非同步的外来信号中分离出各种同步信号,用作控制本地同步信号的基准,使本地同步信号发生器跟踪锁定于这个外来信号.另一种是台主锁相,中心控制机房把外来的各种同步信息与本地基准进行比较,然后把误差信息调制
Frame synchronization machine is mainly used to solve the switching problem of non-synchronous signal in the TV broadcast system.In the past, in order to switch the non-synchronous signal, we must use the tracking phase-lock method to force them to synchronize. There are two main working methods, Is Taiwan from the phase, that is, from the asynchronous signal from the asynchronous separation of a variety of synchronization signals used as a reference to control the local synchronization signal, the local synchronization signal generator tracking lock in this external signal. Another is the master lock Phase, the central control room to a variety of external synchronization of information and local benchmark for comparison, and then the error information modulation