[Scan-DC] Arlington Police Locate Missing Elderly ManUsingLoJack

[Doug Kitchener]

Thanks to all for the responses... I'll have to digest all this stuff over a day or two.

Dewey, I'm inclined to agree with what you've described below... I figured it was probably the system identifying itself and maybe signaling any wayward vehicles to "phone home" or something along those lines.

By the way, I'm a dope... I went down to the Auto Show this afternoon and never even thought to see if LJ had a booth there...

DK

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> From: dewey3 at gmail.com
> To: scan-dc at mailman.qth.net
> Date: Sat, 5 Feb 2011 20:32:46 -0500
> Subject: Re: [Scan-DC] Arlington Police Locate Missing Elderly Man Using LoJack
>
> I hear what Doug is hearing. It's a data burst as described by Doug and not
> beeping, also, it is at regular intervals. Maybe it's a system transmitter
> that sends out "Daddy" signals, I just don't know. I do believe that when a
> car is reported stolen, it is the system transmitters that send a signal out
> to cause the stolen car to go into the "alert" mode (for lack of a better
> term). Is it possible that these regularly scheduled data bursts contain
> "routine housekeeping" data and include freshly reported stolen vehicle data?
>
> Dewey
>
> -----Original Message-----
> From: scan-dc-bounces at mailman.qth.net
> [mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of cohenner at gmail.com
> Sent: Saturday, February 05, 2011 20:21
> To: Doug Kitchener; scan-dc-bounces at mailman.qth.net; scan-dc at mailman.qth.net
> Subject: Re: [Scan-DC] Arlington Police Locate Missing Elderly
> Man UsingLoJack
>
> I can tell you, the range on the people transmitters are not much - if I
> remember correctly, its about 1/2 a mile or so.
>
> The sounds you hear on the receiving device is a beeping. The beeping gets
> faster or slower depending on how far away you are from the transmitter.
> ------Original Message------
> From: Doug Kitchener
> Sender: scan-dc-bounces at mailman.qth.net
> To: scan-dc at mailman.qth.net
> Subject: Re: [Scan-DC] Arlington Police Locate Missing Elderly Man
> Using LoJack
> Sent: Feb 5, 2011 12:48
>
>
> OK, so I've programmed in the LoJack frequency below, and it's doing
> something, because at regular periodic intervals I'm getting a squelch break
> - possibly a data burst, as it sounds similar to the MSP helos' locator
> beacons.
>
> But, what kind of signal / modulation does it use if it spots something?  In
> other woids, what does it sound like?  Also, what's the range?
>
> Thanks!