[time-nuts] Re: Allan Deviation of Z3801A

Bill Janssen billj at ieee.org
Wed Jul 27 13:38:25 EDT 2005

Tom Van Baak wrote:

Much text removed

>Also the "9.8e-13" is one of the stranger specs
>that I have seen. Sometimes you see 5e-13, or
>1e-12, or 2e-12, but "9.8"? It seems a very odd
>number and there must be a story behind it.
If anyone has access to specifications  for SONET or SDH the jitter 
spec. may be
related to the above "9.8e-13".  I worked on those spec.'s a long time ago
and don't remember the details but we were concerned about Allen Variance
for those time intervals.

Bill K7NOM

More information about the time-nuts mailing list