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GPS Interference

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irampil(at)notes.cc.sunys
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Posted: Wed Jul 19, 2006 5:43 am Post subject: GPS Interference

I think its pretty hard for a fan's brush noise at a couple of kHz to reach up to the Av band. 

Here's another possibility:  

  Over time your ground connections are oxidizing and increasing resistance.  The noise may well 

be due to normal radiation of digital circuit clock and switching.  Check to see if there is a voltage greater 

than a few millivolse between both your radio and GPS ground pins to the main battery negative terminal. 

If there is, improve the connections, protect them and add copper to reduce path resistance. 

No oxidizing connections would include FastOns or solder, but ring terminals often rot.

  

 Ira N224XS

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