[time-nuts] OCXO and Aging

[Tom Van Baak]

Hal,

Wonderful plots. Thanks for posting them. Can you tell us a little
about your test setup? I think the group would enjoy hearing how
a long-term experiment like this is done.

I especially like the one-year plot since it nicely shows that even
after a couple of weeks real-world factors like mid-term stability
or environment or just plain random changes become as or even
more important than drift rates.

/tvb

----- Original Message ----- 
From: "Hal Murray" <hmurray at megapathdsl.net>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Wednesday, September 14, 2011 4:07 PM
Subject: Re: [time-nuts] OCXO and Aging


> 
> This is a 3 MHz OCXO from some old telcom gear, nothing special,
> 
> 
> First 3 hours:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-a.gif
> 
> First 3 days:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-b.gif
> 
> First 10 days:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-c.gif
> 
> First year:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-d.gif
> 
> 
> Days 16-36:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-e.gif
> 
> Days 15-60:
>  http://www.megapathdsl.net/~hmurray/time-nuts/Drift-ocxo3mhz-f.gif