7/35 9.1 Time,Frequency,and Phase-Angle Measurement Crystal oscillator 10MH2 Gate 回回回回回回回 Gate control Start Input Trigger Trigger Amplifier Stop stort stop signal and shaper Amplifier 0.0006478sec and shaper (d)Pulse-width measurement Fig.9.1(d)Pulse-Width Measurement (Only one input signal) 8/35 9.1 Time,Frequency,and Phase-Angle Measurement Reference oscillator 360u 回回回回回回回 中，deg F sin wt Trigger start Gate control Amplifier ↑Stop and shaper Start 5 sin (w =-43 Amplifier and shaper Trigger stop (e) Fig.9.1(e):The phase-angle Measurement between two sinusoidal signals of the same frequency To use this method,the amplitude of the two signals must be made equal and the triggering point of the two channels adjusted to be the same.9.1 Time, Frequency, and Phase-Angle Measurement Fig. 9.1(d) Pulse-Width Measurement (Only one input signal) 7/35 Fig. 9.1(e): The phase-angle Measurement between two sinusoidal signals of the same frequency To use this method, the amplitude of the two signals must be made equal and the triggering point of the two channels adjusted to be the same. 9.1 Time, Frequency, and Phase-Angle Measurement 8/35