[Lowfer] 8822 Hz on at 2200Z

[jrusgrove at comcast.net]

Garry

Congratulations! What FFT BW did you end up with?

Jay W1VD  WD2XNS  WE2XGR/2


----- Original Message ----- 
From: "Garry Hess" <k3siw at sbcglobal.net>
To: "lowfer list" <lowfer at mailman.qth.net>
Sent: Thursday, December 18, 2014 12:07 AM
Subject: Re: [Lowfer] 8822 Hz on at 2200Z


> Dex,
> 
> Thanks for braving unexpected tones in your head to keep sending on 8822 Hz!
> 
> My quietest eprobe is the one on the roof, not the one in the back yard. 
> I connected the former to my sdr-iq that is externally clocked by a GPS 
> reference (I had been using my other sdr-iq which runs off an internal 
> XO clock) and extended Spectrum Laboratory to a 131k FFT. That seems to 
> have done the trick.
> 
> Since acquisition I've seen a peak very near 8822 Hz and clearly above 
> the noise floor. Not the good SNR shown at 
> http://46.4.26.83/sp8822_vlf35.png, but that path is only 164 miles 
> versus my distance of 633 miles.
> 
> My soundcard sampling rate for Spectrum Laboratory hasn't been 
> calibrated for awhile so it's not surprising that both the peak at 8822 
> Hz and 8822.1 Hz from my GPS-locked SLM show errors of 0.002 Hz, but 0.2 
> ppm isn't too bad.
> -- 
> 73, Garry, K3SIW, EN52ta, Elgin, IL
>


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