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。
Experiment results show that this digital recorder with index indication has high precision, stability and sensitivity.
实验表明，这种带指针指示的数字式显示记录仪表具有很高的灵敏度和显示精度，很好的稳定性。
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