[time-nuts] PPS pulse length (was: 1PPS for the beginner)

Dana Whitlow k8yumdoober at gmail.com
Tue Aug 14 17:15:41 EDT 2018


Arecibo did a kind of cute trick with their distributed 1PPS.   The one
second pulses were of one length
(100 ns as I recall), but the 10 sec boundaries had the pulses be about
twice that length.  One could carry
this scheme to considerable lengths as desired.

Dana


On Tue, Aug 14, 2018 at 4:00 PM, Attila Kinali <attila at kinali.ch> wrote:

> On Tue, 14 Aug 2018 20:52:50 +0200
> "Bernd Neubig" <BNeubig at t-online.de> wrote:
>
> > Is there any common practice for the duty cycle of the 1 PPS pulse?
>
> As short as the consumer can take. Because a long pulse means that
> you are wasting energy and heating up both the pulse generator
> and the consumer. As TvB wrote, it varies from a few µs to a few ms.
>
>                         Attila Kinali
> --
> It is upon moral qualities that a society is ultimately founded. All
> the prosperity and technological sophistication in the world is of no
> use without that foundation.
>                  -- Miss Matheson, The Diamond Age, Neal Stephenson
>
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