[ntp:questions] Frequency Offset

John Ackermann N8UR jra at febo.com
Sat Feb 25 12:19:25 UTC 2012

Here's an example of retrofitting a better oscillator onto an SBC -- although this was to enable use of an external standard reference frequency, such as a GPSDO:


On Feb 25, 2012, at 1:56 AM, "David J Taylor" <david-taylor at blueyonder.co.uk.invalid> wrote:

> "Alby VA" <albyva at empire.org> wrote in message news:05a722ee-0c23-4cb3-877e-7584ce8ad750 at do4g2000vbb.googlegroups.com...
> []
>> Well, I was thinking you could set the crystal off motherboard and
>> then just runs some wiring back to the connection points where the
>> crystal would sit. That way shapes and sizes wouldn't really matter.
> .. but the extra capacitance and interference pickup induced by doing that could make things worse, or create other problems.  If the frequency offset is within +/-500 ppm limits NTP can tolerate, just live with it and accept that it's the "calibration" for your PC.
> Cheers,
> David 
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