PAL制VHS录像机色度通道中4.43 MHz晶振的锁相问题

Phase locking issue of 4.43MHz crystal controlled oscillator in the chrominance channel of VHS video recorder in PAL system

采用函数分析法对VHS录像机色度通道中4.43MHz晶振的锁相问题进行了分析。结果表明:VHS录像机色度记录通道的4.43MHz晶振应受控于输入信号,且控制的主要对象应为频率;色度重放通道的4.43MHz晶振可自由振荡;记录和重放通道中4.43MHz晶振的初始相位不影响色度信号的解调。