[time-nuts] GPS antenna??

Bob Camp lists at rtty.us
Tue Apr 9 12:46:32 EDT 2013


Hi

Some of these amps do not play well into odd combinations of input and
output impedance. It's often a wise move to put a 6 or 10 db pad on the
output before you feed it to an antenna. 

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Brooke Clarke
Sent: Tuesday, April 09, 2013 11:21 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS antenna??

Hi:

I just got a commercial 2 GHz 50 dB amplifier from eBay and connected it to
a GPS antenna that was passive (i.e. has no 
internal electronics).
The neat thing about this is that you can have a number of GPS receivers all
being driven from the same signal without 
using a bunch of power dividers, cables and worrying about the DC conditions
at the input of each receiver.  Since each 
receiver is using it's own antenna if you attenuate the signal you can get a
feel for the relative weak signal 
performance of the receivers being tested.
http://www.prc68.com/I/Trimpack.shtml#LbandAmp

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html


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