Method and system for detecting bandwidth flatness and consistency of multichannel digital oscilloscope
A digital oscilloscope and detection method technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve time-consuming problems, achieve the effects of improving pass rate, shortening research and development time, and improving production efficiency
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[0043] Example 1
[0044] in figure 1 In the flowchart shown, the oscilloscope calibrator is controlled by the program to output a high and low level as the start mark, and then continuously output a series of standard sinusoidal signals from low frequency to high frequency, and finally output a high and low level as the end mark, the program passes the waveform The recognition algorithm will cut off the high and low levels representing the starting position and the high and low levels representing the ending position from the waveform data collected from the oscilloscope. Through the interception operation, the collected original signal is processed into a signal from sparse to dense. The oscilloscope should be set in the slow sweep state when acquiring this waveform, and it should be ensured that the sampling rate of the oscilloscope at this time is much higher than 2 times the highest frequency of the output signal of the oscilloscope calibrator. This segment of the signal fr...
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[0045] Example 2
[0046] Because most of the oscilloscopes produced have not only one channel, but two or four, or more. This requires our detection system to detect the bandwidth flatness of multiple channels at the same time, and then calculate the consistency between each channel. In this way, checking multiple channels takes the same time as detecting one channel, which greatly improves the production efficiency and greatly reduces the time cost. And it gives very intuitive and accurate results. The process steps are similar to those in Example 1, except that at this time, connect all the channels of the oscilloscope and the output channels of the oscilloscope calibrator, set the oscilloscope calibrator to output multiple channels of the same signal at the same time, and collect the data of multiple channels Enter the computing terminal for processing to obtain the frequency response curves of multiple channels. By drawing these curves together, it is very convenient to ob...
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