[aprssig] FBI Equivalent Of An APRS Tracker

[r gilson]

Interesting 433 for garage door openers and APRS for commercial stuff?  This area has repeater links and other stuff in this area?

--- On Wed, 5/11/11, Wes Johnston, AI4PX <wes at ai4px.com> wrote:

From: Wes Johnston, AI4PX <wes at ai4px.com>
Subject: Re: [aprssig] FBI Equivalent Of An APRS Tracker
To: "TAPR APRS Mailing List" <aprssig at tapr.org>
Date: Wednesday, May 11, 2011, 10:19 AM

That would be a short range link... so  I guess they do a "drive by" and download the data from curbside as opposed to live tracking.  Of course it would be easy (and smart) to make it beacon while moving too.


Wes 
---
The world needs more geniuses with humility because there are so few of us left.




On Wed, May 11, 2011 at 04:36, Jon K Hellan <hellan at acm.org> wrote:


On 05/10/2011 05:23 PM, Peter Baumgartner wrote:



So many adjustments!   UHF "APRS"...


The transceiver chip looks pretty interesting.  Too bad they didn't figure
out what the frequency was.


Just google the datasheet. It's an ISM 433 MHz chip.

Jon LA4RT 




 Looks like a SAW resonator on the board (RFM


RFI172)  It didn't search on the RFM site:
http://www.rfm.com/products/sawresonators.php



Then, what's that that looks like an unencapsulated ceramic chip by the
MAX chip on the RF board??



The chip above the ZEMICX chip a memory   ???4008CAAA  8k memory ??
Perhaps it stores the data and regurgitates it on command.



If you want ZEMICS App note(s) and data sheet(s).  There's several:
http://www.datasheetarchive.com/XE1201-datasheet.html




Now that I've used the X-Bee modules and have some, I'd be inclined to use
them...



--
 73, Steve, K9DCI   USN (Vet) MOT (Ret) Ham (Yet)
--
I served during the cold war, so you can continue to be served a cold one.



--- Stephen H. Smith wrote:



This article from the Wired.com
website shows the disassembly of an FBI tracking device
similar to an APRS tracker.


.<http://www.wired.com/threatlevel/2011/05/gps-gallery>

And an article about a person finding one of these things
on their car:


.<http://www.wired.com/threatlevel/2011/05/gps>


--

Stephen H. Smith    wa8lmf (at) aol.com




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Peter Baumgartner
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eMail: peter.baumgartner at timetronic.it
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