Might actually be related to this finding: https://www.eevblog.com/forum/testgear/rigol-dho804-test-and-compare-thread/msg5112108/#msg5112108
My take on this is that the AWG module's high output level branch (THS3095) draws its power from (locally) unregulated rails. Since the analog frontends are pretty power intensive and the balance of this power may teeter between positive and negative rails, depending on the settings, the rails powering the AFE's local regulator(s) may very well fluctuate considerably. Rigol should have added local regulation to all AWG module supplies. Either greed, negligence or the lack of voltage headroom pushed them to do without those and voila.... At least, at low AWG level settings, the problem is absent.
I appreciate the excellent tip! Mine was set to Default. I changed it to Load Last, then changed all 4 probes to 10x, then restarted, and now I see it saves the 10x setting. Great! Thank you!
As long as the scope remembers the settings when powered off, I don't see this as a problem.
It does NOT remember the change to 10x when you power off and then on again. It resets to 1x, even if you do not press the AUTO button after restarting. Therefore, it is a problem that I would classify as a BUG. But more than that, it's a huge headache to have to manually change all 4 channels to 10x every time you power on the scope!
Bug: NTSC trigger is non-functional
[...]
I'm still willing to concede that the error could be occurring between the chair and the touchscreen, though it is looking unlikely.
I don't think this is a user error. Problems with video triggering have been reported months ago for the DHO1000, https://www.eevblog.com/forum/testgear/new-rigol-hdo1000-12-bit-dso-bugs/msg5007853/#msg5007853, and then for the DHO800 as well, https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5223633/#msg5223633. Looks like Rigol has not been able to fix this yet?
Found strange behavior - enabling LA dividing sample rate by 2, even in slow sampling
Is there any explanation for why the memory is halved if LA is active?
Aren't those two extra memory chips for LA?
I seem to be having a problem with the sensitivity of the touch screen not sensing my touch, any suggestions? I'm assuming this is capacitive, be nice if this had a mouse drive option.
Please check whether the SPI decoding works on logical channels with the latest firmware?
Previously, there were reports that SPI decoding only works on analog channels and doesn't work on digital ones.
Please check whether the SPI decoding works on logical channels with the latest firmware?
Previously, there were reports that SPI decoding only works on analog channels and doesn't work on digital ones.
That is absolutely the case on the DHO924 that I have on all firmware up to and including 1.02. Is there a newer version of firmware than 1.02 out there?
Hi guys,
where can you get hold of the latest version of the firmware ? The on on their website reads v00.01.01.00.01 in the release notes and my scope (DHO914S) came with version 00.01.02.
The logic Analyizer lable bug is driving me mad.
Bug: NTSC trigger is non-functional
[...]
I'm still willing to concede that the error could be occurring between the chair and the touchscreen, though it is looking unlikely.
I don't think this is a user error. Problems with video triggering have been reported months ago for the DHO1000, https://www.eevblog.com/forum/testgear/new-rigol-hdo1000-12-bit-dso-bugs/msg5007853/#msg5007853, and then for the DHO800 as well, https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/msg5223633/#msg5223633. Looks like Rigol has not been able to fix this yet?
Good to know other folks have seen this as well, though mildly concerning the bug hasn't been addressed yet. I missed the earlier post when I skimmed though all 13 pages of this thread last yesterday.
If I my chime in as element between the chair and the touch screen. Trigger on analog TV-Signals on a DHO914 is not working. PAL here. It is not possible to trigger a clean, stable analog TV-Signal (from a digital source btw.) it works however, if you stop acquisition. But I prefer not to look at a single screenshot.
it works however, if you stop acquisition. But I prefer not to look at a single screenshot.
it works however, if you stop acquisition. But I prefer not to look at a single screenshot.
Please explain what you meant? What needs to be done to make the trigger execute once?
PS. If you need "Video" sync, then you can use "Sync by N-th pulse". It works great!
It is not a very important function, but nevertheless strange, they obviously do not care at RIGOL.
If you stop acquisition, you get the "screenshot" of that moment, and a clear signal
It is not a very important function, but nevertheless strange, they obviously do not care at RIGOL.
Today, few people work with analog video signals. So there were probably few complaints to Rigol about this issue.
I do have the impression, that manually adjusting the Trigger in Video, that "knob" just does nothing, you never see the "T'D" - triggered - message, while in Sync on Pulse, you can adjust that.