Hi Ed, Great video! (I have to say, the combined panadapter/waterfall display does a great job showing your problem).
I just checked my radio (an SDR1000, too) at the same frequencies you showed, and I have no spurs. What's interesting about your video is that, in addition to the main spur, there are also lower level spurs at deltas that seem to be in multiples of exactly 1 KHz (you can see these better in the waterfall than in the panadapter). Also - the tones sound pure, not noisy, so I don't believe this is digital noise, per se (although it could be clock related). One thing you might want to check is to see if the tones are being generated within the Edirol or the SDR1000. I'd recommend disconnecting only the "receive" audio that goes from the SDR to the Edirol (I've forgotten which one this is). Are the tones still there? If so, then the spurs are being generated within the Edirol. If not, then something is happening externally to your computer/soundcard system. Something could be coupling into the cabling (a clock of some sort?), or something might be happening within the SDR. You might want to describe your setup further...what else connects to the SDR? For example, do you have the external clock option? What other sources of equipment connect to your radio/computer system? Best of luck! - Jeff, k6jca Edwin Marzan wrote: > Hi Folks, > > I've uploaded a video of my panadaptor which shows a mysterious spur that I > am unable to remove (in most cases) with spur reduction. It occurs mainly on > Lower Side Band. I've heard the tone on previous versions as well but it is > normally buried in the noise. The radio is connected to a dummy load. I'm > using the SDR1000 with an Eridol FA66 and SVN1879. I'm able to operate the > radio normally but hearing the tone in the background is a bit annoying. Let > me know if you have any suggestions on how to remove it. I used the > panadaptor/waterfall combo display in order to make it more visible. > > And guys, please forgive me for the awkward narration!! > > Thank you! > > > http://www.youtube.com/watch?v=RN5yooPYjtY > _________________________________________________________________ > Put your friends on the big screen with Windows Vista® + Windows Live™. > http://www.microsoft.com/windows/shop/specialoffers.mspx?ocid=TXT_TAGLM_CPC_MediaCtr_bigscreen_012008 > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kb.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > > > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
