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RBW and bucket size

Question asked by ljoseph on Feb 15, 2020
Latest reply on Apr 9, 2020 by noiseguy

This is regarding the selection of best RBW for spectrum analyzer (PXA).

Span is 1GHz, number of sweep points 10001. I think PXA has 1001 display points or pixels.

In this case, bucket size is 100 KHz(1GHz/10001).  RBW of 100 KHz will cover one bucket and 1 MHz will cover 10 buckets. Which is better RBW of 100 KHz or 1 MHz?. Or what is the logic for selecting best RBW?