Ok, great. If you are trying to look at the pass band insertion loss response while at the same time the rejection response, dynamic range may very well get in your way. If that sort of measurement is required than one method is separate out each measurement challenge. Go for IL first and then try to eek out as low a noise floor as possible while driving the filter with as much signal as the analyzer will tolerate. Unlike other vna's this has no BW adjust or video filter tweak. Although averaging helps quite a bit.
