Introduced the principles of pulse modulating circuit for measuring power factor.
介绍了一种脉宽调制型功率因数测量电路的工作原理。
This paper introduces the measurement of fish-Finder's pulse modulating frequency with the 8031 single chip computer.
本文介绍采用8031单片微机实现探鱼仪脉冲载波频率的测量。
Modulating the ultrasonic wave, intensity and period of the light pulse will change.
调节超声波，可改变光脉冲的强度和周期。
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