One possiblity could be spurious tones caused by mixing with DDS spurs - if you turn off Spur Reduction (the 'SR' button), do the extraneous tones change frequency or disappear? Do they change as xmit frequency changes?
Also, if you can listen to the line-out audio, do you hear multi-tones there (but this may not be possible with the 5000A)? If so, that would imply that the spurious frequencies might be generated by software. Another possiblity might be a ground-loop, and you're hearing 120 & 300 Hz harmonics of 60 cycles. But I don't know how you'd get ground-loops with the 5000A (although it's certainly possible with the 1000). Someone who's more familiar with the 5000A and/or the software might have a better idea as to what's going on... - Jeff, K6JCA -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Craig Sande Sent: Saturday, November 10, 2007 2:59 PM To: [email protected] Subject: [Flexradio] Multiple tones on cw transmit or tune Yesterday I worked a local friend on 40-meters cw. He was listening with his K3 and said my signal had a musical quality to it and appeared wide on a spectrum display. Listening closer, he thought that there was a main tone at 1500 and additional tones at 300 and 100 Hz (I'm not sure how he was measuring this). Today I transmitted into a dummy load on 20 meters while listening with a Kenwood TS-850 and indeed there sounds like there is the main tone and at least one additional low frequency tone (at much lower strength) being transmitted. Since I don't have a panadapter display on the Kenwood, I can't comment on the signal width. I was using PowerSDR svn 1738. I reverted back to the currently approved version of PowerSDR v1.10.3 and found the same problem. I am keying the Flex-5000a via the jack on the back using a LogiKit CMOS-4 Keyer. I am using firmware version 0.1.1.3. What could be causing this and how can I correct/diagnose the problem? Thanks, Craig, AE7I -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20 071110/b14c5d9a/attachment.html _______________________________________________ FlexRadio mailing list [email protected] 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/ _______________________________________________ FlexRadio mailing list [email protected] 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/
