[time-nuts] GPS Antenna -Receiver Mutual Interference...

[shalimr9 at gmail.com]

The additional advantage is to give you diversity and some immunity against multipath (at least it reduces the probability that both receivers will be affected at the same time due to weird constellation issues or local interference).

But it now creates an issue which is how do you know who is right when both receivers don't agree...

Didier KO4BB

Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: "Rob Kimberley" <rk at timing-consultants.com>
Sender: time-nuts-bounces at febo.com
Date: Mon, 3 Jan 2011 15:59:24 
To: 'Discussion of precise time and frequency measurement'<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] GPS Antenna -Receiver Mutual Interference...

Yes, I've seen this. On installations in the past, when we were putting up
dual GPS systems, we always put them at least 10 metres apart. What is
actually best practice, is to put one at one end of building and the other
one at the other end. 

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark J. Blair
Sent: 03 January 2011 2:19 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS Antenna -Receiver Mutual Interference...


On Dec 30, 2010, at 6:53 PM, Burt I. Weiner wrote:
> Has anyone run into a situation where two GPS Navigation type
Antenna/Receivers interfere with each other?

It's possible that LO leakage from one is jamming the other. When doing
mobile GPS receiver testing at work with a single antenna feeding multiple
receivers through a splitter, we sometimes had to insert attenuators in each
receiver's antenna feed to keep them from jamming each other.

-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.





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