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REVIEW - Rigol MSO5000. Tests, bugs, questions

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Pulsepowerguy:
FWIW, I have 00.01.03.00.03 and I have not noticed this behavior

ebastler:

--- Quote from: NE666 on December 03, 2023, 01:19:21 pm ---sometimes the orange cursor on the vertical axis which denotes the currently set trigger level disappears and I'm unable to find a way to restore it.  Triggering continues to work as expected, the level knob causes the displayed numeric value in the trigger menu bar (top RHS of screen) to update as expected, there's just no on-grid cursor.

--- End quote ---

Any chance you have switched the trigger coupling to AC or LFR? There is no defined DC relationship between the signal and the trigger threshold then, so the orange level indicator gets disabled.

NE666:

--- Quote from: ebastler on December 03, 2023, 06:42:12 pm ---Any chance you have switched the trigger coupling to AC or LFR?

--- End quote ---

Not intentionally, not to my knowledge.  Is there any easy way that I might do so inadvertently, other than explicitly calling for it through the trigger menu?  Is this setting linked to any other(s)?

ebastler:

--- Quote from: NE666 on December 03, 2023, 09:30:44 pm ---
--- Quote from: ebastler on December 03, 2023, 06:42:12 pm ---Any chance you have switched the trigger coupling to AC or LFR?

--- End quote ---

Not intentionally, not to my knowledge.  Is there any easy way that I might do so inadvertently, other than explicitly calling for it through the trigger menu?  Is this setting linked to any other(s)?

--- End quote ---

I don't have an MSO5000 myself, only a DS1054Z (which does show the same behavior). I am not aware of other settings which would implicitly activate AC or LFR trigger coupling. The coupling setting is linked to Edge trigger mode, but in a way which is "harmless", at least the way it is implemented in the DS1054Z:

Edge trigger is the only mode which is affected by the trigger coupling. When you switch to a different trigger mode, AC/LFR trigger coupling is no longer active. On the DS1054Z, the trigger coupling falls back to "DC" when you go back to Edge-trigger, even if you had selected AR/LFR when you last were in Edge-trigger mode. Maybe the MSO5000 is "smarter" in that situation and remembers the last coupling setting, i.e. reactivates AC/LFR coupling when you switch back to Edge trigger mode?

NE666:

--- Quote from: ebastler on December 03, 2023, 09:58:33 pm ---Maybe the MSO5000 is "smarter" in that situation and remembers the last coupling setting, i.e. reactivates AC/LFR coupling when you switch back to Edge trigger mode?

--- End quote ---

Indeed, it does.  Otherwise the implementation is as you describe for the 1054Z.

For the time being I'll put what I'm observing down to fat fingers at the controls and monitor the situation.  Thanks for your input.

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