Any way to shift dBFS curves?

[Audio_Guy_UofW]

Hi
I am importing some measurement sweeps from a digital mic, so in dBFS. I want to use a measurement from a reference mic to correct these by removing the frequency irregularities of the stimulus speaker measured @ the test mic location.

In SPL measurements I can offset the reference mic measurement to 0dB @ 1kHz and use this curve to correct a measured response using the trace arithmetic |A|/|B| function. I want to do the same thing using dBFS measurements, however cannot figure out how to manipulate the dBFS curves to achieve the same result as I have with SPL traces...ie offset the reference mic dBFS curve to 0dB @ 1kHz and then use trace arithmetic to correct the dBFS test mic curve using this offset reference mic curve.

Is this possible in REW, or do I have to export for external manipulation?

Thanks

 

[John Mulcahy]

dBFS levels can't be changed, but SPL is just an offset from dBFS, which you can adjust to be zero if you want by editing the Full Scale SPL figure in the Cal Files preferences settings for the current input, so I'm not clear what the distinction is.

 

[reddress]

Yes, you can normalize a dBFS curve to 0 dB at 1 kHz in REW.