12 days is 1024800 s ie just over 1 million seconds so a frequency
offset of 0.1ppm results in a time error of ~ 0.1s not 1s.
1sec error would occur in just under 116 days,
Bruce
Bob Camp wrote:
Hi
If you take a look down in the fine print on the OCXO spec, the aging rate
is 100 ppb / year in the first year. If you are off by 0.1 ppm (100 ppb)
your clock will gain a second in less than 12 days.
Bob
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Tim Bastian
Sent: Tuesday, April 30, 2013 1:50 PM
To: time-nuts@febo.com
Subject: [time-nuts] Time nut newbie
Hi all,
I'm a time nut newbie. My obsession started with the search for an accurate
chronometer to carry on my boat for celestial navigation. Yes there still
are a few of us left that practice the art.
My current project is a quartz chronometer using a DS32Khz tcxo oscillator
and two 74HC4060s (+ or- 10 seconds / year).
For my next project I'm looking at an Abricon Part Number AOCJY2-10.000MHZ
ocxo 5 ppb running through a pic and using the algorithm posted on
http://www.romanblack.com/one_sec.htm. I'm shooting for + or - 1 seconds /
year.
Is there an archive of old posts that might be helpful in answering some of
my questions and for getting ideas.
Thanks,
Tim KK4FQB
Sent from my Motorola ATRIX™ 4G on AT&T
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