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Channel with data bursts of 10 secs exactly

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RedPenguin

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There is a channel in my area 452.35 which "bursts" exactly 10 seconds each time so I believe it's a LTR Standard yet none of the other frequencies in the license burst or seem to come up with some IDs. I tried to put in the other channels as conventional but never heard anything. Even as an LTR system but never heard anything either.

I checked and no one else in my county nor another close county, that would make me think it's part of another system.

http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=1797835&__newWindow=false
 
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WayneH

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LTR channel controllers have the ability to turn this option on or off. With today's equipment it's not needed. But in this case the other channels are probably set to trunk out to when the home channel, where the bursts are commonly turned on, is busy.
 

cg

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that company shows 26 active licenses. use the FRN to search (0005358452)
go through them all. It is not uncommon for a site to have several licenses or even for licensed freqs to be used at another site.
Put them all into a bank and scan it looking for common conversations etc.
There are some good LTR exploration discussions in previous posts
chris
 

RedPenguin

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Passport instead?

I think the system might actually be Passport or MultiNet or something because on some of the other freqs, it bursts at 3 second intervals, so perhaps, it's one gigantic Passport system.

EDIT: bcTool reports it bursting at different rates, anywhere from 2-3.
 
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inigo88

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That sounds like Passport. On the passport systems I've monitored, they liked assigning the 3 sec burst to the Registering Channel (which announces all the neighbor site registering frequencies so the radio can "roam" between sites). When you hear longer bits of open carrier on this frequency it's probably the subaudible data of a user's radio registering with the site. There will also be a local home channel and a remote home channel for voice traffic. The local home channel will carry voice traffic from people affiliated to your local site (you should hear local addresses, etc.), while the remote home channel will carry talkgroups that are networked through the whole system.

A cool example of this - I've monitored a site (Mt Diablo) on a massive Passport system by Fisher Wireless here in Northern California that was broadcasting traffic from a talkgroup belonging to air ambulance helicopters in Tuscon Arizona! They had made their passport system so big that it spanned parts of CA, NV and AZ.

Hope that helps,

Inigo
 
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