The quickest way to disclose crosstalk as an issue is to
have two stable sources be near beating while logging the timings. One of these
may be the time-base.
I have used such a "vernier" setup to measure stuff in the FreeBSD kernel
and once you get the setup right, the reproducibility is very good.
But until then your numbers will look very random.
Indeed. This also explains why I had an extra 5 MHz OCXO with me to the summer
house. I had a counter to debug and could just not leave it alone for two
weeks.
Come to think of it, my summer house doesn't have a GPS antenna yeat. It's
quite close to you actually.
Cheers,
Magnus
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
Subject: Re: [time-nuts] Using Allan Plots, was(LPRO-101 with Brooks Shera's GPS locking circuit)
Date: Mon, 18 Dec 2006 11:09:42 +0000
Message-ID: <41089.1166440182@critter.freebsd.dk>
> In message <20061218.112305.1155416385.cfmd@bredband.net>, Magnus Danielson wri
> tes:
>
> >The quickest way to disclose crosstalk as an issue is to
> >have two stable sources be near beating while logging the timings. One of these
> >may be the time-base.
>
> I have used such a "vernier" setup to measure stuff in the FreeBSD kernel
> and once you get the setup right, the reproducibility is very good.
> But until then your numbers will look very random.
Indeed. This also explains why I had an extra 5 MHz OCXO with me to the summer
house. I had a counter to debug and could just not leave it alone for two
weeks.
Come to think of it, my summer house doesn't have a GPS antenna yeat. It's
quite close to you actually.
Cheers,
Magnus
