I have been reading these comments on filter ringing in the OMNI VI and wondering what the deal was. I have a 2+ year old 'VI with all the filters, and mine doesn't ring at all @ 500 Hz and very little @ 250 Hz regardless of the 2nd IF filter. Surely that implies that it is correctable SOMEHOW doesn't it? 73 -- Ed Tanton N4XY (770) 971-0436 Marietta, GA email: n4xy@avana.net URL: Coming Soon