[time-nuts] Using a frequency synthesizer replacement for motherboard oscillator
jwalck at netnod.se
Sat Dec 1 20:35:37 UTC 2012
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Eric, your experiences here is of great interest to me too, I've been
exploring external clocking of Ethernet controllers as of late but
have not dived into it yet.
I'm more interested in your how, but of course also in your why.
PS. Hey everyone, new to this list since two days joining after
attending my first PTTI. Working with time and frequency distribution
in Sweden and with time getting deeper into the field both on and off
On 12/01/2012 01:15 AM, Eric Garner wrote:
> I've never done it using to the RTC crystal, but I do it quite
> frequently in my Day Job to Ethernet controllers on those same pc
> mother boards.
> On Fri, Nov 30, 2012 at 4:10 PM, Sarah White <kuzetsa at gmail.com>
>> On 11/30/2012 6:30 PM, Eric Garner wrote:
>>> the actual RTC on modern (Intel based) PC's is driven from a
>>> standard 32,768 Hz crystal attached to the PCH. some of them
>>> are in incredibly
>>> packages now instead of the old tuning fork-in-a-can ones.
>>> peeling off
>>> load caps and crystal from the board would allow you plenty of
>>> spaces to tack down a lead from an external synthesizer.
>> Yeah, the one on the (Soekis) example was pretty small. So far
>> none of of the replies have indicated that anyone on here has
>> experience beyond an embedded system.
>> Mostly I started this thread because there have been a few with
>> people discussing implementing NTP on embedded microcontrollers,
>> arduino, etc. and I was thinking of doing it from the other side
>> (turning a nice-ish server into a rock-solid timekeeper)
>> Thanks so far everyone. Really impressed that I already managed
>> to get 4x replies so quickly :)
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