[brucek]

I've not heard of this problem before. REW usually just works flawlwss - except for some bugs on MACs.

Why not just set the INPUT VOLUME manually and then carry on, and see how it goes?

I guess the SET MEASUREMENT LEVEL went OK, so you now have your receiver volume set to produce 75dB on the RS meter.

Now just set the INPUT VOLUME manually with the up and down thumbwheel to the value it showed during the Set Input Volume test.... i.e 0.5

Then carry onto the CALIBRATE the SPL meter....

BTW - you do have the latest JAVA loaded?

brucek