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I was going to try and observe modulation but when the span is 10 kHz and the RBW 3 kHz, the bins are very obvious. I was at 100 kHz span but the carrier looked flat-topped so I examined closer and found out why. This is not how a real spectrum analyzer works, but I suppose there is nothing that can be done about it.
Gary
W9TD

Gary, As collateral damage from a spur reduction experiment the minimum frequency step became 1kHz (as you can clearly see in your 10kHz span) where the regular minimum frequency step was 156Hz.
Is this 1kHz a problem? If yes, I will revert to 156Hz.

Is this due to the PLL frequency steps? If so, can they be reduced for narrow spans? Yes, I know the sweep will slow down, but that is OK.
Gary
W9TD

Erik,
Sorry I didn't see you reply before commenting. What does the "precise" sweep option do? Maybe that can switch in the smaller steps?
Gary
W9TD

Precise doubles the overlap of the RB filters to make sure you do not miss any signal when scanning.