On Thu, 23 Feb 2012 13:14:52 -0800 (PST), you wrote: >So, what is the best way to calibrate these chips? How do you figure >out the values for tuning register and aging register? I normally set >the tuning register by comparison with a second time source over 1 >week, usually that is good enough for about 10 seconds per year. But >how do you figure out the value of the aging register within 1 week >(or quicker)? > >Michel
Assuming you can get a 1Hz reference from the chip, a frequency counter in period mode will measure to typically 0.01ppm (~0.3s/year) with a 10 second gate time. For your absolute time reference, you can pick up ex-cellular basestation rubidium reference moudules on ebay very cheaply, which will give at least a similar level of accuracy. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
