B&K Precision 2552-2559 - Programming Manual - Manual (Page 53)

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DESCRIPTION The FFT_ZOOM command selects the specified
zoom of FFT.
The response to the FFT_ZOOM? query
indicates current zoom in/out times of FFT
COMMAND SYNTAX
FFT_ZOOM
< zoom > : = {1,2,5,10}
QUERY SYNTAX
FFT_ZOOM？
RESPONSE FORMAT
FFT_ZOOM,
EXAMPLE The following command sets the zoom factor of
FFT to 1X:
Command message:
FFTZ 1
FUNCTION FFT_ZOOM, FFTZ
Command /Query