Description: 1, and other precision digital frequency/phase Tester is a tool designed electronic communications circuit testing is often needed. Design indicators include measurement frequency range: (0.1Hz-100MHz), measurement accuracy: frequency measurement whole is not greater than one millionth domain. Test function with a pulse width, phase testing. Block diagram of the system is shown below, TCLK is measured signals, BCLK as the system clock. Its main control structure shown in Figure frequency measurement principle, the use of high-speed system clock BCLK clock TCLK treat the measured signal is counted, and then calculate the average value of a cycle, the final output high eight data.
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等精度数字频率相位测试仪.c
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