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Please refer to https://www.virtins.com/forum/viewtopic.php?t=4360

https://www.virtins.com/images/multi-instrument/multi-instrument-oscilloscope/VT-USB-Oscilloscope-Damping-Ratio-Measurement.png

The free vibration decay curve method requires MI full package. To enable damping ratio measurement using this method, right click anywhere within the oscilloscope ...

We are closely monitoring the audio analyzer market, and we will consider introducing new models if we see a clear demand or niche to fill.

This issue has been fixed in the latest version MI3.9.15.0

Thanks for the additional explanation. These screenshots are now understood.

The method of measuring magnitude frequency response using a linear frequency sweep in the signal generator along with peak hold in the spectrum analyzer has significant limitations. To achieve higher frequency resolution ...

Thank you very much for the bug report. We will fix it in the next software release.

There is almost no signal in the Oscilloscope, or maybe the signal level is too low, only 0.02% as indicated by the input peak level indicator in the upper right corner of the screen. Please check the connection and the input gain settings.

Yes, MI basically uses the same signal processing chain. However, there may be some differences in the detailed implementation, such as those in the following aspects:
(1) the cutoff frequencies of the bandpass filter and low pass filter. In MI, they are not fixed but based on the measured carrier ...

Thank you for your questions.

In the wow and flutter measurement of Multi-Instrument, a window function (e.g., Kaiser 8) is used only to determine the average frequency of the test signal in the frequency domain. It is not used in FM demodulation. Alternatively, the average frequency of the test ...

1. Generally, with the Peak-Hold method, the slower the frequency sweep, the smoother the measured frequency response. You can also smooth the curve by right-clicking the Spectrum Analyzer window and selecting [Spectrum Analyzer Processing] > "Smoothing via Moving Average". Please refer to Section 3 ...