[ntp:questions] Fwd: Re: NetBSD GPS/PPS using 4.2.6p3
unruh at wormhole.physics.ubc.ca
Tue Aug 23 22:27:07 UTC 2011
On 2011-08-23, Uwe Klein <uwe at klein-habertwedt.de> wrote:
> unruh wrote:
>> But from his test, his system is labelling both edges.
> so he has bounces on the line?
> either that or rise/falltime is so low and noise so high
> that receiver hysteris is not sufficient to supress multiple
> HL/LH changes?
No, his test shows that the line changes and then 100ms later it changes
back and 900ms later it changes again (ie once per second it rises and
falls.) Ie, it is behaving exactly as it should if it were detecting a
pulse 100ms long.It is detecting both the rising and falling edge.
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