给出了系统总体结构、模拟通道设计、倍频锁相电路、数据采集电路、各种电参数测量算法及系统软硬件抗干扰措施。
The system hardware structure, analog channels circuits, data acquisition circuits, measurement algorithms of electric parameters and anti-jamming methods are given.
介绍了利用DSP和MAX115构成的系统对光栅传感器的两路输出信号进行高速同步采集，以及对光栅信号实现200倍频的软件细分方法。
Measure of simultaneous-sampling two channel signals sent from grating sensor, and soft-subdividing of moiré fringes in 200 based on simple system composed of DSP and MAX115 were introduced.
如可以无限细化的FFT - FT方法，二次FFT以及把倍频程应用到声压级测量中，使PDM2000系统更完善。
For example, FFT-FT, two times FFT and octave using in sound measure. All this improvement makes PDM2000 system more perfect.
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