dent says:
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I believe this would make a big difference when using the REW program and the RCA output of the RS digital SPL meter
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Of course it would, and a new digital RS meter calibration file would need to be loaded. This assumes the contention regarding the digital meters RCA output lacking C-weight is true. My feeling is that the C-weight is indeed applied to the jack output on the digital meter, just as it is with the analog version. Sonnie can test this. Either way, he has a calibrated mic to test against it and can come up with a new compensation file if necessary.
REW has the ability of reverse compensating for C-weight to theoretically create a flat response. If you used a mic/meter that produced an output that perfectly tracked a C-weight, then the REW reverse compensating for C-weight would be suffice. But it just ain't so with the RS meter, so we use our own calibration file to create a flat response. If you load a calibration file, the REW C-Weighting compensation is ignored except for areas above and below the calibration files frequency range.
Having said all that, my point is that we don't really care about the weighting once we decide to use our own calibration file. It's simply an inverse compensation for the inadequacies of the mics/meters output . If the digital meter is different from the analog one - no problem, we need to make a new file. But if Sonnie tests a digital one against an analog one and they are the same, we'll just use the present newrs.cal.
brucek