@8f54e24a try narrowing the upper / lower limits to cover 2300-2600mhz you may see it better as with a wide bandwidth it averages points so it looks worse than it actually is 

 @e7b4518c unfortunately not. but somehow that doesn't fit. calibration was okay. I have to check if there is an error somewhere.

https://mastodon.radio/system/media_attachments/files/111/177/423/218/367/717/original/16e5650b6d8d7e59.jpg