I am wondering aboout the pseudodifferential an differential inputs of the PXI-4461
I am doing measurements on switch mode amplifiers where the outputs are bridged and not really ground (PGND) referenced. The input is ground (AGND) referenced to a 5V section. Due to switching currents, AGND and PGND can fluctuate relative each other.
I understand that the pseudo-differential inputs means the inputs are decoupled from ground and therefore suitable for common mode noise reduction. Differential are fully differential per input.
- Is there any performance (accuracy) downside to the fully differential mode, compared to pseudo-differential?
- How are maximum voltages specified for fully differential mode (max voltage relative to ground)?
- Can I use one input channel of the PXI-4461 in differential mode, one in fully differential?
Thanks
