Warren & All: No cal, I just turned the radio on.... http://s1296.photobucket.com/user/wa3tts/media/Longwave/capt00035_zps3910f9a8.jpg.html Peak background level was between -71.2 and -71.7 XIL peaking in the -41 to -42 range Sorry only 16 bit resolution, the other PC is on 630m wspr2.... 73, Mike wa3tts