The performance of servo control system determines the reliability and stability of VTR (video Tape Recorder), and enables ultimately VTRs to record and replay video signal accurately.
伺服控制系统的优劣决定着录像机的可靠性及稳定性，是录像机得以正确记录和重放视频信号的根本保证。
2
Experiment results show that this digital recorder with index indication has high precision, stability and sensitivity.