[ntp:questions] NTP on local networks

unruh unruh at invalid.ca
Wed Aug 1 14:47:53 UTC 2012


On 2012-08-01, Chris Albertson <albertson.chris at gmail.com> wrote:
> On Tue, Jul 31, 2012 at 7:46 PM, Kennedy, Paul <P.Kennedy at fugro.com.au>wrote:
>
>> Exactly so.  you can purchase a GPS receiver for well under $100 connect
>> it to a serial port + pps on any of the pc's and have microsecond
>> accuracy in a few hours.  This 'master' can then serve time to all other
>> PC's.  The systems will then behave for years of unattended use.  It is
>> a far more cost effective solution.
>>
>
> The OP said he can go into another room and connect to the Internet can
> sync a computer.   It seems to me that there might be some rule that
> prevents wires going into the room he works in, else why not simply run an
> Ethernet cable.   Many places do have such rules.  He might work in a place
> where they process classified information.  In that case they might not
> allow an antenna cable or any kind of wire to penetrate the room boundaries.
>
> If I have guessed correctly then what he needs  is an atomic clock.  Buy a
> few of those $40 Rubidium units that are on eBay

Atomic clocks need to be synchronized to UTC, and they do eventually
drift as well. 

>
>
>> regards
>> pk
>>
>>
>> --
>
> Chris Albertson
> Redondo Beach, California



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