[time-nuts] Re: Allan Deviation of Z3801A
phk at phk.freebsd.dk
Wed Jul 27 17:12:48 EDT 2005
In message <184.108.40.206.0.20050727143735.03801ae0 at mjs.alientech.net>, Mike S writes
>At 01:38 PM 7/27/2005, Bill Janssen wrote...
>>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.
>T1.101 specs long term of 10e-11 for a Primary Reference Source (Stratum 1).
Surely not 10e-11 ? 1e-11 maybe ?
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
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