unruh wrote:
On 2012-01-10, David J Taylor<[email protected]> wrote:
pulse over the length of line he talks about should be no problem at all
(but a microsecond-wide pulse might). The timing PPS I've seen are in the
tens of milliseconds wide. If there is overshoot, perhaps a capacitor to
Did you mean 10s of ns? The Sure width is about 5-10ns. at the card
without any line attached. The line could certainly broaden that up to
about 1us, but ms?
Even the Garmin 18 is less than a usec.
You're mistaking rise time for pulse width: Not the same thing at all!
Some timing GPSs, like the original Oncore has a very short PPS
duration, while many/most others seem to be in the 100-200 ms range.
Terje
--
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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