On 16/06/2013 10:04, andyfoad@... wrote:
For example I've seen figures of nanoseconds and microseconds quoted on
the troublesome modules, yet my Reyax UP501 which works flawlessly has a whole 100ms width for the 1pps output.
From where I am standing it does seem that this pulse width is the
key to it all.
Andy
Did the Rayax work on v2.01
The 1pps pulse width does seem to be tied up with the claimed accuracy for for timing / frequency purposes. Hans obviously knows how to handle long and short versions, a mid way compromise seems to be needed, if v2.01 had not got it right for the Trimble I may have been thinking about adding a Schmitt Trigger.
Hans was still exuding confidence on a solution last time we spoke on the subject.
I didn't comment at the time because I haven't tried it, but your tip of using an LED to detect the PPS signal I am fairly sure would not work on the Trimble GPS, its too quick for the Scope so I don't think the eye would catch it.
73 Eddie
