Hantek DSO2D15 - Page 1
Forum section: electronics / beginners

author: RAP
author_rank: Contributor
timestamp: February 02, 2022, 10:06:13 am
content: I just received my Hantek DSO2D15 oscilloscope. I’m new to oscilloscopes but I think this has something wrong with it. I set the trigger to edge – rising – auto. I bring up a 5 volt square wave and set the trigger to 2.5 volts. When I adjust the volts per division the trigger goes back to 0. Readjust the trigger and adjust the volts/div and it goes back to 0 again.Is something wrong with me or the scope?ThanksRAP

author: RAP
author_rank: Contributor
timestamp: February 03, 2022, 01:37:05 am
content: Does anyone with a DSO2D15 have this problem?Thanks

author: Shock
author_rank: Super Contributor
timestamp: February 03, 2022, 06:50:04 am
content: Check "Trigger Source" and "Trigger Mode" auto mode is for without trigger conditions, it sounds like you want trigger conditions so normal mode?

author: RAP
author_rank: Contributor
timestamp: February 03, 2022, 07:59:06 am
content: Thanks Shock,In trigger source I have 4 choices – ch1 – ch2 – external – line. (What is “line”?) I have it set on ch1.When I set trigger mode to normal it still does the same thing.Here is a short video showing what it is doing. Notice the trigger setting in the upper right of the display keeps going back to 0.Thanks

author: Shock
author_rank: Super Contributor
timestamp: February 04, 2022, 01:42:43 am
content: Channel 1 is correct, it's just the reference to trigger off.See this video at 5m40s of this video, yes it does appear to reset the trigger level after you adjust vertical volts scale. I checked my Rigol DS1054Z on auto and it only exhibits this collapsing the signal almost fully down 50v scale. When you start expanding it again it resumes triggering (without affecting the trigger level).I don't have that Hantek scope so can't check or investigate it here but if the scope has a defaults and a self calibration feature I'd follow those first, then do a firmware update if applicable. Your probes also appear to need compensating.You can always ask Hantek if it's working as designed, but yeah it looks annoying. Welcome to the world of cheap Chinese scopes I guess.

author: RAP
author_rank: Contributor
timestamp: February 04, 2022, 02:57:53 am
content: Yes- that video shows the same thing that mine is doing.Now whats strange is I set the probe and probe setting from X10 to X1 and now it seems to work fine.Switch back to X10 and I lose the trigger setting again,Why would that happen?Thanks

author: Shock
author_rank: Super Contributor
timestamp: February 04, 2022, 09:02:45 am
content: It looks firmware related, probably a bug. Do as I said before then if still a problem contact Hantek.It's a cheap scope and not worth your time messing with it. If they don't get back to you, send it back to Amazon or ebay etc and reroll.

author: RAP
author_rank: Contributor
timestamp: February 04, 2022, 11:28:43 am
content: I Have done the self calibration and the factory reset.I have not done any firmware update - don't know how.I have contacted Hantek and the seller but they are on holiday till next week, (New year).This was a cheap scope but it was the best i could afford for the features it has.I'm only a beginner and have already learned from this scope. Hopefully I get better.I was hopping someone in the group had a fix for this problem.?Thanks for you help.

author: Shock
author_rank: Super Contributor
timestamp: February 04, 2022, 12:59:21 pm
content: Firmware updates are software fixes, and it looks software not hardware (aside from the sluggish performance).SendAndrewBCNhere a private message (PM), he can probably tell you if it's been fixed and advise which is the best firmware and procedure. Link this thread and the video you did.Note that sending PMs here and inbox storage is limited for new members (spam prevention) so delete a few inbox messages until you have 10-20 or so forum posts. I think you can send PMs at 5 forum posts and there is a cap of 5 PM replies in you inbox or something like that.Don't worry about the beginner thing, we are all beginners at something.