Come on... there's a bug thread for every single Siglent product. Some have never been fixed.
Then meet Hantek products, Siglent will look perfect
.
At work, I have a RF analyzer from Rigol which randomly resets everything, or measures completely wrong.
Set center freq, span, resolution... 10 minutes later it went back to 1GHz and default resolution.
Or when measuring armonics / floor noise... you get -70dBm, now leave it alone for 10 minutes and when coming back it reads -30dBm.
At first you blame the circuit, but when you test others that were already working... the analyzer is to blame.
Check everything, settings are correct.
Reboot, no difference.
Set defaults, reconfigure it... sometimes it will work... at 2nd or 3rd attempt. Luckly it will work for another 30 minutes.
Though I'm not discarding a hardware failure, perhabs a faulty relay in the signal path / attenuator block, or something like that, but I don't think so, that wouldn't randomly reset the configuration!