Ok, I’ve noticed that before . When I changed unit this way I get different value depend of RBW. I used noise generator (constant noise value) so I should had the same value (unit dBm/Hz) for different RBW settings.
Do you think I should use noise bandwidth instead RBW? https://relatedcontentdemo.kinsta.cloud/support/forums/topic/noise-bandwidth-of-resolution-bandwidth-filter/