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Craig,
Yeah, or you could do something like that :) Cutting the antenna off
the gps works well too.
In this guy's case, he's trying to block onstar so it's kinda hard to
put a grounded casing around the antenna...
Rock on! :)
Pete
Craig Rash wrote:
|
| ----- Original Message -----
| From: "Peter Grace" <pgrace@fierymoon.com>
|
|>It's pretty easy to block a gps unit, although I can't imagine why
|>anyone would want to do that.
|>
|>Here's how!
|>
|>The document referenced below talks about two carrier frequencies, L1
|>and L2.
|>
|>Carrier frequency L1 = 1575.42 MHz
|>Carrier frequency L2 = 1227.6 MHz.
|>
|>If you were to transmit a low-intensity carrier with some sort of
|>modulated tone on those two frequencies (well short of half a watt --
|>don't want to get taken by the men in fatigues!) any GPS receiver in
|>the area of your transmission will not be able to "hear" the data bursts
|>from the gps satellites.
|>
|>1) Get yourself a ham radio license (and learn about the amateur radio
|>code of conduct -- this sort of stuff should NOT be done to another
|>person without their consent)
|>
|>2) Pick up a 1200mhz HT that can be modified (most can be modified to
|>have a pretty far transmit band) OR, find plans on the internet and
|>build a transmitter yourself!
|>
|>3) find something to modulate the carrier (i.e., a microphone -- don't
|>play music or you'll be fined by the FCC)
|>
|>4) Leave the sucker on, or turn it on when you're wanting to block GPS.
|>
|>Voila, blocked GPS.
|>
|
|
|
| OR.... you could cover the receiver with a cardboard box :-P
| Craig Rash
| -------------
| Black 2000 Sport CC 4x2
| See details and pics at:
http://mywebpages.comcast.net/2kdaksport/index.htm
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This archive was generated by hypermail 2b29 : Sun Feb 01 2004 - 16:29:49 EST