----- 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
This archive was generated by hypermail 2b29 : Sun Feb 01 2004 - 16:29:49 EST