[time-nuts] Cs stability

[Magnus Danielson]

From: Chuck Harris <cfharris at erols.com>
Subject: Re: [time-nuts] Cs stability
Date: Mon, 16 Jul 2007 21:55:26 -0400
Message-ID: <469C218E.3070001 at erols.com>

> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+magnus=rubidium.dyndns.org+magnus=rubidium.dyndns.org at febo.com
> 
> Tom Van Baak wrote:
> > ); SAEximRunCond expanded to false
> > Errors-To: time-nuts-bounces+cfharris=erols.com+cfharris=erols.com at febo.com
> > 
> >> For example tilting the Cs unit by 90 degrees will typically give an error  
> >> of about 1E-09 or so.
> > 
> > Have you tried this with your FTS 4050? Anyone else do
> > this with a 4060 or hp 5061?
> 
> I'm pretty sure that back when my FTS4050 was still working
> it didn't care one little bit about orientation.  Perhaps
> yours has lost its magnetic shielding, and is reacting to
> the change in the orientation of the Earth's magnetic field?

It seems a little high a number still.

> The C'beam standard package in the FTS4050 is an FTS5000 which
> was designed to be used in all sorts of 28V applications, including
> portable standards and avionics.

You don't happend to have more detailed FTS1200 specs and maybe schematics?

I assume that it is an SC-cut crystal in there, but it might be AT-cut.

Cheers,
Magnus