Hello All, With the K3 Roofing filter set to 400 hz when I switch from data mode to usb there is abt 200 hz shift in the bandwidth . Is there something misaligned ????????? TU Ken K5DNL -- View this message in context: http://n2.nabble.com/K3-IF-Shift-range-tp1083361p1083361.html Sent from the Elecraft mailing list archive at Nabble.com.