[time-nuts] TEC party file format?

paul swed paulswedb at gmail.com
Wed Jun 29 15:23:34 UTC 2011


Well a funny thing happened on the way to water sprinklers, ball field
lights etc.
The silly things use motorized timers. So they will tend to drift. Though
modern sprinklers should be micro controlled to god knows what reference.
(poor is a guess)
But there are lots and lots of those controllers no one pays attention to.
Typically in office building electrical closets.


On Wed, Jun 29, 2011 at 10:53 AM, Tom Van Baak <tvb at leapsecond.com> wrote:

> Chris,
>
> Sounds good. Somebody that's interested or knows NTP (not me)
> can be the first to set up a mains frequency timed PC, publish
> fancy MRTG plots on the web, and watch the TEC test in July.
>
> Realize this is all just for fun. TEC should have zero impact on
> modern computer networks. The last system I worked with that
> relied on 60 Hz power for timekeeping was a 70's PDP 11/34.
>
> /tvb
>
> ----- Original Message ----- From: "Chris Albertson" <
> albertson.chris at gmail.com>
> To: "Discussion of precise time and frequency measurement" <
> time-nuts at febo.com>
> Sent: Tuesday, June 28, 2011 4:06 PM
> Subject: Re: [time-nuts] TEC party file format?
>
>
> The Linux or BSD pulse per second interface is general enough to work for
> this.
> It does not care if the pulses are one per second or 100 per second, or 60.
>
> Al it does it capture a timmer/counter when a pulse comes in.  Then
> fets a flag a user program can read that says "data available".  The
> user level programs reads the device ad gets the captured counter
> value, the flag is reset.  Very simple and very low overhead.
>
> I think the counter units are nanoseconds
>
>
>
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