在 TA7193电路中,色同步移相网络和 APC 电位器的调整都可以改变解调轴的位置,二者可以进行适当的互补作用,使解调轴处于正确位置。但这种补偿并不是无限制的,否则将出现无色或上色慢的问题。我们知道,锁相电路在相位锁定的状态下,压控振荡信号与基准信号的相位差并不是恰好呈正交状态,该相位差偏离正交状态的角度称静态相位误差。该误差直接影响解调轴的 In the TA7193 circuit, the adjustment of both the color shift phase shift network and the APC potentiometer can change the position of the demodulation axis, both of which can be complemented properly with the demodulation axis in the correct position. However, this compensation is not unlimited, otherwise it will appear colorless or slow color issues. We know that phase-locked circuit in the phase-locked state, the voltage-controlled oscillation signal and the reference signal is not exactly the phase difference between the orthogonal state, the phase deviation from the orthogonal state of the static phase error. This error directly affects the demodulation axis