That is not entirely true. Some analysis has been done. One can extract the transmitting base station identifier and other things. Google sdrtrunk and LoJack. Yes, sdrtrunk has a choice to decode LoJack although the documentation is incomplete and there are some errors.Decoding the signal will only yield an unusable multi-digit reference code.
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Typically each base station transmits every 64 seconds at the start of an 8 second window (so there are 8 transmitting windows normally possibly limiting one to hearing 64/8 = 8 base stations. In my area, there are a lot of base stations meaning a transmission every 8 seconds can be heard from a base station with each base station heard again 64 seconds later. Any replying mobile unit will be heard between these.I'm just put in the 173.075 frequency on my SDS200 and I get a squawk about every 10 seconds or so. It will squawk a few times and then maybe be silent for 1 minute. Sometimes I get what sounds
Yeah I think this kind of sounded like what I was hearing on Saturday or Sunday when I shot the video. It seemed like there would be a period of time every so often where you would hear no signals whatsoever for about one minute and then the cycle would start over again that sounded a little bit more like what you're describing in this example.Not quite right. There are 8 8-second windows in each 64 second period that can be used by different base stations. Stolen articles replay between those transmissions.
Decoding the base station will tell you the base station site number and what it is telling some (unidentifiable to us) asset what to do (slow down or speed up or turn off repetition of its transmissions, etc.)Decoding the signal will only yield an unusable multi-digit reference code.
No specific user info.
Not always. Local banks don't use dye packs. They use radio transmitters and several patrol vehicles have the necessary triangulation equipment to track the bait money.If you hear a data burst once every second, that is a LoJack unit that has been activated. If you have ever seen 4 VHF antennas arranged in a square on the roof of a police car, they are used for the directional display on the LoJack receiver.