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Nivex 🐧 📻 @nivex@octodon.social

I've got a signal here I can't figure out what it is, despite spending some quality time with sigidwiki.com :

nivex.net/images/tmp/mystery-s

Audio is recovered from FM demodulator.

Hoping @rey or some of the #hamradio folk might know what it is.

Ed W8EMV @w8emv

@nivex @rey

Sounds maybe like a radar?

What's the frequency you picked this up from? Did you have a waterfall to look at? How wide is the bandwidth?

Nivex 🐧 📻 @nivex@octodon.social

@w8emv @rey I thought maybe it was some kind of paging system. On very rare occasions it does deviate from that idle rhythm. It's much narrower than the other paging systems I've seen though, and it never unkeys.

Ed W8EMV @w8emv

@nivex @rey

wireless.fcc.gov/auctions/data

lists it in the pager band plan as channel "GN". Maybe look up your location on radioreference.com/ and see if that pans out.

If you are in Minnesota, that channel is listed at wiki.radioreference.com/index. as an NXDN frequency (trunked digital voice).

Nivex 🐧 📻 @nivex@octodon.social

@w8emv @rey RadioReference pretty much only has voice stuff around here.

FCC's geosearch has been essentially inop the last couple weeks, so I searched by licensee state and hoped for the best. I think this is it: wireless2.fcc.gov/UlsApp/UlsSe

So yes, very likely paging. Question is, what protocol is that? It doesn't appear to be anything in multimon-ng's vocabulary.

Ed W8EMV @w8emv

@nivex @rey

This referenced page comspeco.net/paging-services/p has their instruction manuals for their hardware, and a map of service coverage on VHF.

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