Finding new FCC licenses, confused why some db entries don't have a license

[mk262]

I'm sure this is a dumb question, but I can't figure it out on my own.

When I look at a site, like this:
Orlando Air Site Details (Statewide Law Enforcement Project 25 Radio System (SLERS P25))

I can't find any state licenses in orange county using the 700mhz band. How are they licensed?
http://www.radioreference.com/apps/d...=0&s=ent&bf=72

[Chauffeur6]

All 50 states, plus DC, Puerto Rico and the US Virgin Islands, were granted statewide SL blanket licenses for the 700 MHz public safety band. Florida's is WPTZ787.

[mk262]

Originally Posted by Chauffeur6

All 50 states, plus DC, Puerto Rico and the US Virgin Islands, were granted statewide SL blanket licenses for the 700 MHz public safety band. Florida's is WPTZ787.

So the only way to find trunked systems is to just incrementally scan the whole band?

How do they handle interference?

[Chauffeur6]

Those statewide licenses only apply to trunked systems run by the state itself, and only cover the 700 band. Counties or other agencies would be required to license 700 MHz systems the same as any other license, including providing detailed site info.

Each state is allocated an exclusive 2.4 MHz block of frequencies in the band (192 12.5 kHz frequencies), which they can basically do what they want with as far as building out sites. They are supposed to have certain frequencies allocated for usage in specific counties, but I haven't yet seen a state hold to that. They basically just work with the regional planning committees and other states to mitigate interference at state borders.