[time-nuts] PRS10 1 PPS Out having random phase jumps

Bob Camp kb8tq at n1k.org
Mon Nov 23 19:16:52 EST 2015


How big are the jumps? Are they all N x some integer ns ?

If so, then yes, I’ve seen Rb’s that do exactly that. The answer is a defective 
divider chip.


> On Nov 23, 2015, at 6:01 PM, James Robbins <jsrobbins at earthlink.net> wrote:
> Jumps can occur over as little as 500 seconds.  There is no pattern which I can perceive.  When I look at the TL phase ("P") view, I see strong downward going "pulses" in the phase view.  I have tried opening up the enclosure I mounted the PRS10 in to cool it.  I can measure the temperature of the case at about 40dC.  Well below it's spec, I think.  And, no, the 1PPS IN is not being used to discipline the outputs.  I can send along a .tim file showing the jumps to anyone who is interested and sends me their email.
> Jim Robbins
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