[time-nuts] Cycle jumps in Z3801A PPS?
Brian Kirby
kirbybq at bellsouth.net
Mon Jan 29 18:40:49 EST 2007
I cannot say what is happening with the second unit.
I have one, that started jumping like yours. I did not see anything
wrong with it. I recycled the power and it came back OK and has now run
nonstop for 4 months.....
Brian N4FMN
John Ackermann N8UR wrote:
> I'm looking at the PPS output of my pair of Z3801As. One of them
> generates a nice plot with about 50ns peak to peak noise over 1 day
> (measured against a 5061A). You can see that data at
> http://www.febo.com/time-freq/plots/cs1-z3801a_1.html.
>
> However, the second unit seems to have random jumps, usually for just
> one PPS sample and occurring once every hour or two, of very close to
> 100 nanoseconds. You can see what I'm talking about at
> http://www.febo.com/time-freq/plots/cs1-z3801a_2.html.
>
> Since 10 MHz has a period of 100 ns, I'm guessing that this jump
> indicates some sort of one cycle slip in the PPS generator.
>
> Has anyone else seen this behavior?
>
> John
>
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
>
More information about the time-nuts
mailing list