Hi, apologies if this has been asked an answered somewhere else but I couldn't find it. I'm trying to merge a diffraction corrected Nearfield response with a gated Free field response using Trace arithmetic in REW. I've done this previously and it worked fine but for a while now I have unexpected behaviour shown below. I'm merging the NF red response as B to the FFblue response as A at 300Hz. The resulting green line is gated the same as the FF response when I'd expect it to match the red response down to 20Hz. If I increase the time window the green curve just drops off quickly.
What's happening here and has something changed over the last few months?
thanks in advance
What's happening here and has something changed over the last few months?
thanks in advance
I think I've solved it, the merging frequency is too close to the frequency at which I'm starting the sweep which is 100Hz in the case of the FF measurement. If I merge around 400 I get the behaviour I expect.
