I have been fighting this problem for several months. The problem started after 1.4.16. Prior to this release the situation was rock solid. I get precisely what you describe. Also my power output advances significantly from a nominal 100w to 135w when I get the modulation. The situation seems to be random and occurs about 10-20% of the time. It will on occasion correct itself during a transmission, or it will go into "modulation mode" during a transmission. Before it does that I can hear a crackle on the signal. It sometimes has variable penetrance, meaning instead of 135W it may only be 110 or 120 and the modulated portion of the signal is audiably less.
I use a P4 3.3ghz with a firebox. I have 2 identical SDR systems including computer and firebox and it happens on both systems. Also I have been told this problem has not occurred at flex headquarters so I am glad to see it is not peculiar to my system. 73 Lee W9OY __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com