Mike's (w6thw) suggestion is a good one. Switch off all other equipment and see if it goes away.
Also - your noise floor looks pretty high to me (compared to what I see on my SDR). What is your preamp set to? The high noise *may* be indicative of an incorrectly calibrated receiver - do you have a good, calibrated, RF source that you can use to calibrate the receiver levels? I'm wondering if these tones are actually really far down in level (below the A/D's threshold), but, because input gain is too high, they're being digitized by the A/D and appearing as real (albeit faint) signals) - but I'm really just guessing here. I don't know if the Edirol has a preamp prior to the A/D (many A/D's do), nor if Flex controls the gain of this preamp. If not, that is, if gain is only applied in software, then this thought is probably wrong - but you may still need to calibrate the receiver. By the way, if you don't have a calibrated RF generator that you trust, Elecraft makes one that is perfect for something like this (I recommend that all hams have one). If you're still not having any luck, more clues might be gained by looking at the entire panadapter display (zoom all the way out) . Are there any patterns? Also - what's the IF frequency set to? Thanks, - Jeff, k6jca Edwin Marzan wrote: > Hmmm.... there is a switching power supply powering another transceiver > nearby. I'll see what happens when I turn it off. > > Thanks for the info.Edwin MarzanAB2VW > > > Date: Thu, 10 Jan 2008 09:09:48 -0800From: [EMAIL PROTECTED]: Re: [Flexradio] > Mysterious Spur Visible on PanadaptorTo: [EMAIL PROTECTED] > Hi are you using a switching power supply if so try another one and see if it > still there. > Just thought it might be the same thing i had happen on all bands. > > _______________________________________________ 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/
