Exactly, well put.
John WA4WDL
--------------------------------------------------
From: "Mark J. Blair" <n...@nf6x.net>
Sent: Tuesday, September 07, 2010 12:24 PM
To: "Discussion of precise time and frequency measurement"
<time-nuts@febo.com>
Subject: Re: [time-nuts] What position is measured?
On Sep 7, 2010, at 6:30 AM, jimlux wrote:
Another analogy is that if you had a machine that recorded all the
signals, mounted right at the antenna, and then carried the recording
half way around the world, and then ran the recording into a receiver, it
would give you the position of the antenna, not the receiver. The cable
is just a time delay.
Does this mean that while the antenna feedline cable length does not
influence the measured position (at the phase center of the antenna), and
it does not influence the accuracy of a disciplined frequency reference
output, it does introduce an error into the absolute time output (i.e.,
adding a delay to the PPS output)?
In other words, do I correctly assume that I may safely ignore the length
of my TBolt's antenna feedline if I am only interested in its 10 MHz OCXO
output, but I may want to compensate for it if I ever find a need to use
its PPS output as an absolute time marker?
--
Mark J. Blair, NF6X <n...@nf6x.net>
Web page: http://www.nf6x.net/
GnuPG public key available from my web page.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.