PPMU by most ATE manufacturer definition is Per Pin Parametric Measurement Unit. By this it means each digital channel pin has its own Parametric Measurement Unit.
For the PXIe-6571, it is quite misleading to say it has PPMU but actually each bank of 8 digital channels has a shared Parametric Measurement Unit.
It should be renamed SPMU (Shared Parametric Measurement Unit).
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