Edwin: Nice video, a picture truly is worth a 1000 words. See my observations below.
I see and hear the exact same thing that you do and as demonstrated in your video. I'm also using the SDR1000 with an Eridol FA66, SVN 1801 at 96khz I see and hear the spurs only when on the dummy load!(as you noted in the video) When I connect the antenna the spurs are below the noise level and cannot be seen or heard. This was the case on 40 and 80 meters. On 20 meters and higher, I again saw the same thing that you noted. The spurs were on the opposite sideband. On 20 meters when I switched to LSB I could hear and see the spurs. They were really noticeable when on the dummy load. When I connected the antenna (Force 12 C3 and Lighting Bolt Quad) I could still barely hear the spurs just at the noise level (on LSB). I don't know if all this is a problem. I always run with a antenna and on the proper sideband when on the high bands. I don't know if what you (we) have observed is normal. But it does not seem to effect the operation of the radio as it normally would be used (I think). I would like to check for the spurs on 40 and 80 when the band was really quite. It seems a bit noisy tonight. I have noticed spurs on all radios I have owned in the past when no antenna was connected. Also I think that spurs are more likely on a SDR type of radio. It is the nature of the beast. But with the spur reduction feature you can eliminate or move them to where you are not. In the case of spurs that can not be removed from the bandpass, I guess I don't care if they are below the noise. I would be interested to know if others see the same thing when conducting the test exactly as you described doing it. Connected to a dummy load. (I saw the same results with no antenna or the antenna grounded). Best Regards Mark NU8Z -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edwin Marzan Sent: Thursday, January 10, 2008 11:27 AM To: flexradio@flex-radio.biz; [EMAIL PROTECTED] Subject: [Flexradio] Mysterious Spur Visible on Panadaptor 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 VistaR + Windows LiveT. 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/
