[Scan-DC] LoJack

[Chris Smolinski]

>Does anyone monitor LoJack on 173.075? They send out a broadcast page on
>this frequency when a car is reported stolen, then the car's LoJack system
>starts sending out periodic pings on this frequency to be received by the
>base station, and by direction finding equipment in some police cars. I used
>to have this freq programmed in, but can't recall ever hearing anything.
>This afternoon, the Arlington PD were getting a LoJack hit within two blocks
>of my office, so I started listening. I never heard anything, and they
>apparently lost the signal as well. Just curious if anyone has ever
>encountered LoJack signals. I imagine they sound like brief bursts of data,
>every 30 seconds or 1 minute or so (there's a rule about how often they can
>transmit, but I forget what it is).
>
>DANG! Just as I was about to hit send, I heard a data ping. Maybe that's the
>car they're looking for, or the base station? Nifty.
>

I 've heard pings on 173.075. I've never known if they were base 
stations or cars. My understanding is that the cars ping at a slow 
rate until the police get close, then they are instructed to ping at 
a faster rate?


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Chris Smolinski
Black Cat Systems
http://www.blackcatsystems.com