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<DIV>The XE1201 *can* work on 433 and could be, but don't assume this. This is a government operation. The XE1201 operates from 300-500. The SAW resonator frequency isn't obvious from it's markings. If I was the FBI i don't think I'd want to be fighting everybody's remote whatever. The 300+ MHz garage opener frequency (I've measured) would be better, or what ever frequendy they darn well please...</DIV>
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<DIV>Like I said - a shame they didn't measure it...of course if it doesn't beacon, then they'd have to do more fiddling to see it receive somethong, coax it into talking, or disect it further...</DIV>
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<DIV>If it is, I wonder of some of those strage squwaks I here on 433 are these trackers...<BR><BR>-- <BR>73, Steve, K9DCI USN (Vet) MOT (Ret) Ham (Yet)<BR>--<BR>I served during the cold war, so you can continue to be served a cold one.<BR></DIV>
<DIV>--- On <B>Wed, 5/11/11, Mark Earle <I><wa2mct@mearle.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Mark Earle <A href="mailto:wa2mct@mearle.com">wa2mct@mearle.com</A>
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<DIV>On 5/11/2011 10:32 AM, r gilson wrote: </DIV>
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<TD vAlign=top>Interesting 433 for garage door openers and APRS for commercial stuff? This area has repeater links and other stuff in this area?<BR><BR></TD></TR></TBODY></TABLE></BLOCKQUOTE>
<DIV><BR><A class=yiv1827943478moz-txt-link-freetext href="http://www.arrl.org/band-plan-1" rel=nofollow target=_blank>http://www.arrl.org/band-plan-1</A><BR><BR>Per that (and I understand different regions may not adhere 100% to this)<BR><BR>433.00-435.00 Aux/Repeater links<BR><BR>My own repeater has a duplex link in this area.<BR><BR>Remember, though, Amateur use is secondary from 420-449.99 in the US; and there are "Line A" and "Line B" geographic restrictions on use of parts of the band. <BR><BR><BR></DIV>
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<TD vAlign=top>--- On <B>Wed, 5/11/11, Wes Johnston, AI4PX <I><A class=yiv1827943478moz-txt-link-rfc2396E href="http://us.mc1126.mail.yahoo.com/mc/compose?to=wes@ai4px.com" rel=nofollow target=_blank ymailto="mailto:wes@ai4px.com"><wes@ai4px.com></A></I></B> wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Wes Johnston, AI4PX <A class=yiv1827943478moz-txt-link-rfc2396E href="http://us.mc1126.mail.yahoo.com/mc/compose?to=wes@ai4px.com" rel=nofollow target=_blank ymailto="mailto:wes@ai4px.com"><wes@ai4px.com></A><BR>Subject: Re: [aprssig] FBI Equivalent Of An APRS Tracker<BR>To: "TAPR APRS Mailing List" <A class=yiv1827943478moz-txt-link-rfc2396E href="http://us.mc1126.mail.yahoo.com/mc/compose?to=aprssig@tapr.org" rel=nofollow target=_blank ymailto="mailto:aprssig@tapr.org"><aprssig@tapr.org></A><BR>Date: Wednesday, May 11, 2011, 10:19 AM<BR><BR>
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<DIV>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.</DIV>
<DIV><BR clear=all>Wes </DIV>
<DIV>---<BR>The world needs more geniuses with humility because there are so few of us left.<BR></DIV><BR><BR><BR>
<DIV class=yiv1827943478gmail_quote>On Wed, May 11, 2011 at 04:36, Jon K Hellan <SPAN dir=ltr><<A rel=nofollow>hellan@acm.org</A>></SPAN> wrote:<BR>
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<DIV class=yiv1827943478im>On 05/10/2011 05:23 PM, Peter Baumgartner wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>So many adjustments! UHF "APRS"...<BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>The transceiver chip looks pretty interesting. Too bad they didn't figure<BR>out what the frequency was.<BR></BLOCKQUOTE></BLOCKQUOTE><BR></DIV>Just google the datasheet. It's an ISM 433 MHz chip.<BR><BR>Jon LA4RT
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<DIV class=yiv1827943478h5><BR><BR> Looks like a SAW resonator on the board (RFM<BR>
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<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>RFI172) It didn't search on the RFM site:<BR><A href="http://www.rfm.com/products/sawresonators.php" rel=nofollow target=_blank>http://www.rfm.com/products/sawresonators.php</A><BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>Then, what's that that looks like an unencapsulated ceramic chip by the<BR>MAX chip on the RF board??<BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>The chip above the ZEMICX chip a memory ???4008CAAA 8k memory ??<BR>Perhaps it stores the data and regurgitates it on command.<BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>If you want ZEMICS App note(s) and data sheet(s). There's several:<BR><A href="http://www.datasheetarchive.com/XE1201-datasheet.html" rel=nofollow target=_blank>http://www.datasheetarchive.com/XE1201-datasheet.html</A><BR></BLOCKQUOTE><BR><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>Now that I've used the X-Bee modules and have some, I'd be inclined to use<BR>them...<BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>--<BR> 73, Steve, K9DCI USN (Vet) MOT (Ret) Ham (Yet)<BR>--<BR>I served during the cold war, so you can continue to be served a cold one.<BR></BLOCKQUOTE><BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>--- Stephen H. Smith wrote:<BR></BLOCKQUOTE><BR>
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<BLOCKQUOTE style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=yiv1827943478gmail_quote>This article from the Wired.com<BR>website shows the disassembly of an FBI tracking device<BR>similar to an APRS tracker.<BR><BR>.<<A href="http://www.wired.com/threatlevel/2011/05/gps-gallery" rel=nofollow target=_blank>http://www.wired.com/threatlevel/2011/05/gps-gallery</A>><BR><BR>And an article about a person finding one of these things<BR>on their car:<BR><BR>.<<A href="http://www.wired.com/threatlevel/2011/05/gps" rel=nofollow target=_blank>http://www.wired.com/threatlevel/2011/05/gps</A>><BR><BR><BR>--<BR><BR>Stephen H. Smith wa8lmf (at) <A href="http://aol.com/" rel=nofollow target=_blank>aol.com</A><BR></BLOCKQUOTE></BLOCKQUOTE><BR><BR>
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