Why can't I measure differential voltage across all DATP's, PLT-300A?

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Ted Kuhn

• June 13, 2024 19:27

I'm trying to measure differential voltage between DATP12 and DATP11 (I've tried so far DATP12 against DATP11/10/09/08/07) using the command:
- command: measure voltageDiff DATP11-DATP12 <100mV

But I get the error:
"Cannot measure differential for DATP11-DATP12"

The description of the signals here doesn't indicate any issues with doing this:
Probes and Signals — PLT Documentation (pltcloud.com)

Why can't I do this?  Is there a document somewhere that I can reference to figure out which channels I can measure differentially without having to experiment with every permutation?

Thanks!

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• Official comment

  

  Ivo Clarysse

  • June 14, 2024 05:22

  ADC-based differential voltage measurements (voltageDiff) are supported for the following combinations of signals only, due to limitations of the ADC chip used to perform these differential measurements:

  first signal	second signal
  DATP00	DATP01
  DATP00	DATP03
  DATP01	DATP03
  DATP02	DATP03
  DATP04	DATP05
  DATP04	DATP07
  DATP05	DATP07
  DATP06	DATP07
  DATP08	DATP09
  DATP08	DATP11
  DATP09	DATP11
  DATP10	DATP11

  We'll update the documentation to clarify this limitation.

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• 

  Ted Kuhn

  • June 15, 2024 03:57

  Thanks Ivo!

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