Re: [Discuss-gnuradio] Need help identifying jammer signal

[Patrik Tast]

Terve Juha,

Some animal neck collar TX:er are very close to that feq (440 MHz).
It could be on a wolf, reindeer or a hunter that use a *home brew*
(illegal) collar on his dog. Building a *home brew* dog collar is
popular today since you can get parts without any questions asked...

I would contact the person who count wolfs near you.

Eagles here (Vaasa, FI) use ARGOS up-link to POES sats 401.65 and
downlink 465.98 MHz (bw 24/80/110 kHz).

Patrik

On Fri, 2013-12-06 at 13:48 -0500, Juha Vierinen wrote:
> Hi,
> 
> 
> In the last few days a signal has entered in the center of our
> incoherent scatter radar band. It drifts between 440.1 and 440.4 MHz
> very slowly and has approximately a 10 kHz bandwidth. A scope plot of
> the signal shows something that looks a little bit like frequency
> shift keying. While the frequency is stable on short time scales, the
> signal tends to drift a lot on the scale of days, suggesting that
> whatever is causing this signal, it is broken. 
> 
> I've attached a GRC plot of the signal. In the plot, the jammer is at
> a +166 kHz offset. The scope plot is centered at this frequency and
> has a 40 kHz bandwidth. 
> 
> Does anyone have any idea what this could be?
> 
> 
> juha
> 
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