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 > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
