Strange behaviour in Waveforms when emulating an Analog Discovery 2

[CPP]

Hi,
I found a strange behaviour in Waveforms, in demo mode, when emulating an Analog Discovery 2.
This impacts at least the following versions:  3.14.3, 3.15.21, 3.16.3

Spectrum
- Freq range auto (or 100kHz)
- Start 0
- Stop 100kHz

Wavegen
- 20 kHz ok
- 21 kHz does not appear in Spectrum in demo mode  !!!!

Is this a bug?

Thank you for your help

[JColvin]

Hi @CPP,

I have moved your question to the section of the Forum where the engineer most familiar with the WaveForms software will be able to see your feedback.

That being said, I'm not sure what you mean by the 21 kHz not appearing the Spectrum demo mode, the 21 kHz spike seems to be present in the demo Spectrum mode, unless I'm misunderstanding what you are referring to.

Thanks,
JColvin

[attila]

Hi @CPP

Thank you for the observation. It is corrected for the next build.
Edit: https://forum.digilentinc.com/topic/8908-waveforms-beta-download/

There is a threshold in demo mode deciding at what sampling/generator rate it performs signal preview or random. This was at 10 so for a 200kHz sample rate (100kHz spectrum top) generated preview for signals up to 20kHz. This is now changed to 2.