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Siglent SDS1104X-E anomaly on what should be a simple task.

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bdunham7:

--- Quote from: tautech on February 06, 2021, 09:37:49 pm ---AC input coupling sometimes can help.  ;)

--- End quote ---

Definitely not in this case.

bdunham7:
Nothing better than a Jim Williams application note on point:

https://www.analog.com/media/en/technical-documentation/application-notes/an120f.pdf

Appendix B is most pertinent, but the whole note is of interest. 

tautech:

--- Quote from: bdunham7 on February 06, 2021, 09:43:19 pm ---
--- Quote from: tautech on February 06, 2021, 09:37:49 pm ---AC input coupling sometimes can help.  ;)

--- End quote ---

Definitely not in this case.

--- End quote ---
It should.
The total waveform amplitude if using AC input coupling will be shifted with 50% above and below the channel 0V marker which will allow you to offset the signal further before exceeding the offset limitation.
The attenuation of the probe used however can put you into a different offset spec but some quick mental sums can disclose if that might be a problem.

bdunham7:

--- Quote from: tautech on February 06, 2021, 09:53:24 pm ---It should.
The total waveform amplitude if using AC input coupling will be shifted with 50% above and below the channel 0V marker which will allow you to offset the signal further before exceeding the offset limitation.
The attenuation of the probe used however can put you into a different offset spec but some quick mental sums can disclose if that might be a problem.

--- End quote ---

I have a signal that never goes to zero, and I'm trying to measure the absolute difference between zero and one particular part of it.  I don't see how AC coupling could ever accomplish that.

And I see the forum has struck again with the photos not showing properly, at least for me.  What gives?

tautech:

--- Quote from: bdunham7 on February 06, 2021, 10:17:36 pm ---
--- Quote from: tautech on February 06, 2021, 09:53:24 pm ---It should.
The total waveform amplitude if using AC input coupling will be shifted with 50% above and below the channel 0V marker which will allow you to offset the signal further before exceeding the offset limitation.
The attenuation of the probe used however can put you into a different offset spec but some quick mental sums can disclose if that might be a problem.

--- End quote ---

I have a signal that never goes to zero, and I'm trying to measure the absolute difference between zero and one particular part of it.  I don't see how AC coupling could ever accomplish that.
--- End quote ---
With Measurements or Cursors.


--- Quote ---And I see the forum has struck again with the photos not showing properly, at least for me.  What gives?
--- End quote ---
Forum bug. Insert pics the old way with links to your uploaded thumbnails inserted between [ img] flags.
Use only the 2nd attachment (more attachments) to also get around the attachment bug.

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