REW Beta Release Saved measurement sweeps have different start and stop frequencies

[greatadrian]

I am using REW 5.20 b29 on Windows machine. I've noticed that when measurement sweep is being saved to the file, it contains incorrect start and stop frequencies.
For example, when setting it the range to 1 kHz - 8 kHz and saving the wav file, the actual range is extended to 500 Hz - 16 kHz. Is that intentional and I am missing something?
Please see the attached images:

256kMeasSweep_1000_to_8000_48k_PCM24_LR.wav

 

[John Mulcahy]

The measurement sweep spans the range from half the start frequency to twice the end frequency (with an overall limit of half the interface sample rate) to provide accurate measurement over the selected range. That is mentioned in the Measurement help but not in the signal generator help, I'll add a note there.