Hi guys, I think I found part and maybe most of the reason for my AGC issues. I finally dug out my XG1 signal generator and did the level calibration. It seems to affect more than just the S-meter levels. The overall sensitivity of the rig has increased a good bit. It seems I can do with less RF gain now and the AGC action is much smoother.
I originally did the level calibration against WWV on 10 or 15 MHz depending on the time of day. Of course the signal levels aren't consistent over a few seconds or even when averaged for parts of the day. I think the real 50 uV signal helps a lot. I couldn't find my dummy load, duh!!! So I set my PRO 2 to QRP levels, maybe at watt or two, on an unused part of 40 meters and did the rx imagine calibration. Yes I id-ed in CW afterwards. I had about -48 dbm into the SDR receiver without an antenna hooked up. I only did the imagine calibration on v1.8.0 and transferred the values, from the Image Rejection tab, to v1.9.0 SVN 1180. I hope that is enough. I will have to try the real calibration procedure again to be sure. Somehow I suspect that the imagine calibration won't produce the same results twice. I will have to try it again. I would hope it produces values within the ball park on multiple runs. The moral to the story is to RTFM and do the calibration correctly. Also Lee's suggestions about the RF gain were valuable. Lee and Tim: What versions of PowerSDR are you using on a regular basis? 73, Steve N6VL -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lee A Crocker Sent: Sunday, May 20, 2007 3:42 AM To: Tim Ellison; Flexradio Subject: Re: [Flexradio] AGC and Constant Volume??? Peter has it correct, it varies according to band and time of day, and it is set up by ear. Mine usually is less than 100 and greater than 80 with fast AGC and low preamp, on 160 80 and 40. I sometimes use med preamp on 40 and 30. I hardly ever go above 30 so I haven't played with it on for example 10 Lee _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
