Absolutely.
![Clapping :clap:](https://www.eevblog.com/forum/Smileys/default/clap.gif)
So when the amplitude of the sweep signal gets smaller by turning the pot, that is faithfully reproduced on screen as a SHORTER sweep.
Normally the H. amp faithfully reproduces the same amplitude sweep as the pot is turned, and changes only the sweep frequency.
That's why the H. amp is working so faithfully.
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
It reproduces exactly the signal it is fed, and that has been verified, and checked several times.
![Broken! :-BROKE](https://www.eevblog.com/forum/Smileys/default/smiliey_scope_broke.gif)
Maybe I am failing to accurately describe the failure. Maybe the fault will become clearer with screen shots of the failed, and good scope, and those waveform signals also shown on the test scope??? Maybe.
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/grin.gif)
One interesting thing is that at the highest sweep speed, I do not see the problem. I have to check this further, checking amplitude, and frequency.