Normally, averaging the scope trace (Options --> Average) works as intended.
However, once I select trigger noise reject (Options --> Trigger Options --> Noise Reject), the trace no longer gets averaged (even though averaging is still selected when I check).
When I turn off noise reject again, the curve gets averaged again.
It seems that you have the previous version of the software. Please download the version 3.05 from the Downloas site: velleman.be/be/en/download/files/
The modifications compared to previous version are:
[quote]Version 3.05, released 22/11/2007 -> Update for PCSU1000 and PCS500:
History waveform display added. Allows you to review up to 1000 previously acquired waveforms.
Average mode works now with Noise Reject and 1GS/s sampling.
Update for PCS500 only: