"Mark C. Stephens" <[email protected]> wrote in message
news:4bde1132003994498b736b8017d15d10088ef...@exch2010.non-stop.com.au...
[]
GPS initially was selected but eventually got marked as false ticker.
I am going to drag a silly scope down there to have a look at the timing
pulse, I have a vague suspicion it maybe inverted by the rs422-rs232
convertor which I built. Although unrelated to this issue, I came across
this today while building a 'gadget box' for a trimble acutime:
TTL out of rs422 convertor goes into the max232 like this :
__
_______| |___________
But the rs232 comes out of the max232 inverted, like this:
_______ ____________
\__/
The slew rate on rs232 is not so good for timing is it ):
Mark
This is what I suggested to you yesterday. Did you not see my post? You
need a positive edge on the DCD line when working normally, but there is a
setting in the ntp.conf (for some refclock implementations) allowing you
to select the other edge. See, for example:
http://lists.ntp.org/pipermail/questions/2011-October/030861.html
Cheers,
David
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