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How do I determine the number of LOs in PNA-X SA?

Question asked by Macree on Dec 20, 2016
Latest reply on Dec 22, 2016 by Macree

In PNA-X SA setup,there is a "Number of LOs"parameter.It changes when I change span or image reject selection but I don't know what algorithm or function it uses to calculate the number and determine LO frequency.Dose anybody know about it,please tell me something about it.And I'm also confused by the "FFT resolution".It seems like the resolution after zero padding,but zero padding will change amplitude and shape of RF signal.How dose the system eliminate those side-effects?Thank you very much.