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Is it possible to measure the Bode characteristic of the converter using a generator and an oscilloscope? I want to determine the stability reserve of the phase and amplitude. I have a transformer injecting the DHO814 oscilloscope, an FY6900 generator, and I wrote a code in python that injects voltage into the feedback loop on a 51ohm resistor.

I have the impression that my data reading from the oscilloscope is too slow in relation to the regulation. It seems to me that if I read every 100ms, the converter will stabilize by then? Can it be done on the equipment I have?

Does the oscilloscope have to be set to the AC range? Because that's what I did

This is how I determine the gain, I don't know if it's right?

amplitude_ratio = (np.max(vout)) / (np.max(vin))

gain_db.append(20 * np.log10(amplitude_ratio))

Yellow input waveform and blue output waveform