[time-nuts] Delay through GPS antenna splitter/amplifier -- an answer, and a question
Magnus Danielson
cfmd at bredband.net
Mon Mar 12 13:04:26 EDT 2007
From: John Ackermann N8UR <jra at febo.com>
Subject: Re: [time-nuts] Delay through GPS antenna splitter/amplifier -- an answer, and a question
Date: Mon, 12 Mar 2007 12:04:06 -0400
Message-ID: <45F579F6.2070501 at febo.com>
> But we're time-nuts... we DO worry about those things. :-)
Indeed!
Oh my goodness, the PPS is 10 ps late due to unmatched cable-lag! What should I
dooooo? (For the egg-clock in the kitchen)
> While we were at it with the network analyzer, we did FDR (frequency
> domain reflectometry) to measure the cable delay to the antenna, and I
> spent yesterday making up six matched cables to go from the splitter to
> the receivers -- they all test within about 1 nanosecond of each other.
I would use TDR/TDT for that. :)
> Obsessive compulsive? Me?
Naaa....
Cheers,
Magnus
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