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DMMCheck Plus Multimeter Reference(and other References) - Experiences..
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alm:

--- Quote from: Martin72 on July 11, 2023, 03:40:48 pm ---Ref.Voltage measuring, DC, AC100hz, AC10khz all with the SDS1104X-E from siglent, the SDS2504X HD will soon follow.
Have a look at the statistics(at ac, dc was too short)....nice.

--- End quote ---
Thanks for the measurements. I'm surprised by the droop in the AC 100 Hz signal showing a high pass effect. I'd expect them to generate a square wave at very close to the reference amplitude with the idea that the fewer components contribute to the output signal, the fewer components that can drift. Now any temperature-dependent effect in the coupling capacitor will effect the output.
KungFuJosh:

--- Quote from: alm on July 11, 2023, 07:08:03 pm ---Now any temperature-dependent effect in the coupling capacitor will effect the output.

--- End quote ---

That seems relevant given what claims they made about the new device they're releasing.
Martin72:
At the moment my SDS2504HD measure the same signal - without "deforming"...
Must investigate this.
alm:

--- Quote from: Martin72 on July 11, 2023, 08:14:00 pm ---At the moment my SDS2504HD measure the same signal - without "deforming"...
Must investigate this.

--- End quote ---
The SDS1104X-E was not set to AC coupling, was it?
Martin72:
Look at the pics, right side..
Meanwhile I did several measures with the HD, with probe, without probe, everytime fine and looks great, post the pics soon.
But now I´m turning the SDS1104X-E on again, want to know what´s going on. ;)
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