Products > Test Equipment

New Rigol HDO1000 12-bit DSO - BUGs

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TK:

--- Quote from: skander36 on December 14, 2022, 02:34:10 pm ---
--- Quote from: markone on December 14, 2022, 12:08:56 pm ---I would like to report a quite annoying bug, some settings are not stored / restored correctly across a shutdown, even manually recalling a setup saving.

For instance, at least in my case, channel one coupling is erroneously set to AC after reboot.

--- End quote ---
Yes, I can confirm this behaviour. I was thought that it is on purpose but I don't remember to read about this in user manual.
Also Flex knob does not always action even if it has focus on that field.

--- End quote ---
I have the same issue.  My unit also defaults channel one to 20MHz bandwidth limit.  Happens with and without probe attached.

markone:
Spotted right now another issue with Trigger with low level signal, i.e Sine 1MHz 50mVpp does not trigger with zero and negative thresholds (see attached image).
Rising threshold to 5mV and / or signal amplitude to 60mVpp scope starts to trigger ...



TK:

--- Quote from: markone on December 14, 2022, 04:28:04 pm ---Spotted right now another issue with Trigger with low level signal, i.e Sine 1MHz 50mVpp does not trigger with zero and negative thresholds (see attached image).
Rising threshold to 5mV and / or signal amplitude to 60mVpp scope starts to trigger ...

--- End quote ---
Does it not trigger at all or you see erratic triggering?  My experience with trigger at 0V is that it is subject to the input signal noise as it fluctuates and causes the trigger to fail

markone:

--- Quote from: TK on December 14, 2022, 05:30:28 pm ---
--- Quote from: markone on December 14, 2022, 04:28:04 pm ---Spotted right now another issue with Trigger with low level signal, i.e Sine 1MHz 50mVpp does not trigger with zero and negative thresholds (see attached image).
Rising threshold to 5mV and / or signal amplitude to 60mVpp scope starts to trigger ...

--- End quote ---
Does it not trigger at all or you see erratic triggering?  My experience with trigger at 0V is that it is subject to the input signal noise as it fluctuates and causes the trigger to fail

--- End quote ---

Does not trigger at all but i guess it would be enough to slowly rise the threshold to find the condition you describe.

Funny thing is that if you change signal shape you get different results.

skander36:

--- Quote from: TK on December 14, 2022, 04:08:42 pm ---  My unit also defaults channel one to 20MHz bandwidth limit.  Happens with and without probe attached.

--- End quote ---
Indeed. Also on Rigol 5K (Rigol tradition :) ). On HDO 1K you can disable if you want after start. Rigol 5k don't let you disable bw limit on signal levels under 2 mVpp.

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