Siglent SDS2000X Plus disappearing Trigger Level Display - Page 1
Forum section: electronics / testgear

author: jdata
author_rank: Newbie
timestamp: October 20, 2022, 06:58:24 am
content: Have a new Siglent SDS2104X Plus scope. Working fine, kind of. Have the latest release of the firmware (v 1.5.22R1) At first the Trigger Level was displayed on screen, but then disappeared. Reloaded the firmware, but still no Trigger Level display. Anyone else seen this issue? Fixes? Not even sure the trigger level is working correctly. Doing nothing out of the ordinary, just viewing analog waveform.Trigger is setup to use the correct channel. Plenty of signal. Also, pressing the Trigger Level control, does not center the Trigger Level in the center of the waveform all the time.Thank you,jdata

author: tautech
author_rank: Super Contributor
timestamp: October 20, 2022, 08:16:39 am
content: Quote from: jdata on October 20, 2022, 06:58:24 amWelcome to the forum.By chance have you selected Trigger AC coupling ?If so it is normal for the level indicator to not be shown.When it has you bluffed at any time while you're getting to know it pressing Default can wipe most settings and get you back to square 1.

author: BillyO
author_rank: Super Contributor
timestamp: October 20, 2022, 12:39:05 pm
content: This happens on the SDS1000X-E series too so I guess it is a "feature" not a bug??My only question would be why?

author: jdata
author_rank: Newbie
timestamp: October 20, 2022, 09:53:02 pm
content: Yes, I did have the Trigger in AC Input. Changing it to DC did bring back the Trigger Level display. For a few minutes, the trigger did not display correctly, but then seems to be working as expected. When not working, after centering the Trigger Level by pressing the TL knob and then adjusting the level manually, had incorrect trigger on waveform display. It may manifest itself when the Channel waveform is not in its default diplay position. (For this experiment of the scope, I was using the bult-in AWG with a simple 1 kHz Sine wave).After all is said, it is working; however, I agree with BillyO, why does DC Coupling not behave properly?Looking forward to the next firmware release.Thank youjdata

author: rf-loop
author_rank: Super Contributor
timestamp: October 21, 2022, 06:10:51 am
content: Quote from: jdata on October 20, 2022, 09:53:02 pmPlease explain with all details what real problem there is.

author: jdata
author_rank: Newbie
timestamp: October 21, 2022, 10:11:15 am
content: QuoteMeant  AC Coupling Mode on trigger input. Don't know why it should disappear in AC Coupling Mode.When it wasn't working, manually adjusting the TL resulted in very short range of the level adjustment and getting text on the display that the TL was at its limit - in either +/- direction. After centering the trigger level on the Channel Sine wave (no offset), adding a positive level, the waveform adjusted ever slightly. Same going negative. I could not manually adjust the TL to the full amplitude of the waveform. Also, I could not get the TL of the Sine wave on its zero-crossing.After a while, it all started working correctly.Go figure. That's about as far as I investigated. As long as it works in Trigger DC Coupling Mode, I can get something done.Thanks to all.

author: H.O
author_rank: Frequent Contributor
timestamp: October 21, 2022, 10:33:44 am
content: Perhaps this will help: