I can't find an old osc for less than this brand new. Why would an old analog be better? Not arguing, just looking for advice.
Digital scopes are measuring the input signal in different points and the displayed wave form is
approximated using math algorithms based on measured values.
In User Manual of HDS is stated that "sin(x)/x" formula is used for
waveform interpolation.
Let's assume the device measures the input signal in 2 consecutive points A and B. The points between A and B will be draw on display using something like "sin(B-A)/(B-A)".
So, the displayed wave form is not the exact wave form the of signal.
If is any glitch between point A and B, it wil not be displayed.
When using an analog scope, the displayed wave form is (almost) acurate and will show that glitch.
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Might help (a screen capture of comments attached
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
) :
Just for reference:
https://www.ebay.com/itm/175287845576https://www.ebay.com/itm/175228776929