The attached images show the start and end of the waveform (ultimately a square wave) that my CPO produces. It's a screenshot taken from Audacity.
Interesting to see the peak at the start and the fade at the tail. The tail is obviously as a result of the RC network that is used for the oscillator – and thereby the capacitor discharging. The peak at the start is… not sure..
More audacity captures shortly. 😉
(Interesting to do the waveform via Audacity instead of the CRO – benefit of audio frequencies I guess, although I used the lowest sampling rate of 8kHz.)