What can be the experimental test set-up to calculate CMRR of an analog circuit DUT

[Msmatrixin]

For any analog circuit which I would design, how should I measure the CMRR using lab instruments ?

 

[dick_freebird]

Get yourself an op amp test loop setup, like the ones shown here:

www.analog.com/en/analog-dialogue/articles/simple-op-amp-measurements.html

Then leave the common mode of the signal alone and vary the
positive and negative supplies pairwise (so that your signal path
remains ground referred for range / resolution), but its common
mode position relative to the rails, moves.

Depending on internal complexity, there could be a common mode
w.r.t. ground sensitivity as well as an outer-rails sensitivity (classic
op amps had no ground connection but more integrated lineups
maybe have ground referred dividers, summing, filtering, etc.).

 

[Msmatrixin]

Thanks .... quite helpful