I've got a signal here I can't figure out what it is, despite spending some quality time with sigidwiki.com :
https://www.nivex.net/images/tmp/mystery-signal-454337500.wav
Audio is recovered from FM demodulator.
Hoping @rey or some of the #hamradio folk might know what it is.
http://wireless.fcc.gov/auctions/data/bandplans/pagingLwrband.pdf
lists it in the pager band plan as channel "GN". Maybe look up your location on https://www.radioreference.com/ and see if that pans out.
If you are in Minnesota, that channel is listed at https://wiki.radioreference.com/index.php/Mobile_Radio_Engineering_(NXDN)_DSDPlus.frequencies as an NXDN frequency (trunked digital voice).
@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: http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=2422846
So yes, very likely paging. Question is, what protocol is that? It doesn't appear to be anything in multimon-ng's vocabulary.
This referenced page https://comspeco.net/paging-services/paging-services.html has their instruction manuals for their hardware, and a map of service coverage on VHF.
Here's a RadioReference page about Part 22 paging channels
https://wiki.radioreference.com/index.php/Part_22_Paging_Channels
It looks like these are paired channels - have you gone 5 Mhz up to the 459.3375-459.3625 and looked for traffic there too?
@w8emv @nivex @rey according to the models listed I'd expect to see Motorola Flex or POCSAG traffic on their frequencies. Might be slow POCSAG to improve link budget and thus building penetration and range.
I'd probably look at IQ and eye diagram.
For decoding multimon-ng seems a decent option. CF. http://www.hagensieker.com/blog/page/?post_id=73&title=reading-other-peoples-pager-traffic-and-shit
@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.