Hi Jeff,
The setup is very simple. Astron VS-20M Power supply, SDR-1000, Eridol FA66, HP
Computer, MFJ Tuner (no power supply), Creative Labs Speakers. Switched on and
off all other equipment at home and no luck. Receiver is calibrated with
Elecraft XG-1. IF was changed from 11.25 (I think) to 9 or somesuch via
PowerSDR. Noise level is very high here in the Bronx. I see the same high
levels with my other transceivers. I don't see any other patterns other than 1
khz spacing that you noticed on the waterfall display. I'm going to see if my
older version of PowerSDR exhibits this same behavior.
Thanks for the suggestions!Edwin MarzanAB2VW
=====================================================================================================
> Date: Thu, 10 Jan 2008 10:31:17 -0800> From: [EMAIL PROTECTED]> To: [EMAIL
> PROTECTED]> CC: flexradio@flex-radio.biz> Subject: Re: [Flexradio] Mysterious
> Spur Visible on Panadaptor> > 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.> > > >
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