[time-nuts] Delay through GPS antenna splitter/amplifier -- an answer, and a question

Tim Shoppa shoppa at trailing-edge.com
Mon Mar 12 17:46:35 EDT 2007

John Ackermann N8UR <jra at febo.com> wrote:
> But we're time-nuts... we DO worry about those things. :-)
> 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.
> Obsessive compulsive?  Me?

At the lab I worked at in the 80's, all the cables hanging on
the wall-racks were calibrated and labeled in nanoseconds.

But... after the ECL signals got turned into TTL, we just didn't
care anymore :-).


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