[time-nuts] Failure mode in GPS receivers

Magnus Danielson cfmd at bredband.net
Sun Dec 17 16:30:46 EST 2006


From: David Forbes <dforbes at dakotacom.net>
Subject: Re: [time-nuts] Failure mode in GPS receivers
Date: Sun, 17 Dec 2006 14:09:19 -0700
Message-ID: <f06230901c1ab6169a46b@[192.168.0.14]>

Dave,

> The point is that some receivers require more RF signal from the 
> antenna than others to achieve the same satellite tracking 
> performance.
> 
> You might try improving the S/N ratio of the failing receiver by 
> bypassing the splitter and connecting it directly to the antenna, 
> netting a 6 dB signal increase, to see if it gets happier.

Won't help if he has a GPS distribution amp which has 0 dB gain, i.e. the
splitting is compensated by the same amount of gain.

So, this trick only works for a passive splitter. I made sure I have an active
one.

Cheers,
Magnus



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