RE: [802.3ae_Serial] From serial PMD call 17 Apr: need more experimental evidence
Juergen,
You ask, have tests been made? I don't think there is new experimental
evidence in the public domain. I tried to progress it by simulation, but
simulation alone cannot solve the problems.
You say that adding of an unsynchronized signal is not the kind of
impairment you will see on an interface [in service]. That's right. We are
using it as a convenience, to substitute for some bandwidth-limiting and
create pulse shrinkage, in a way that can easily be varied in the lab. I
agree it would generate a waste of performance. The question for the group
now is, how much is that waste, will we tolerate it and leave the standard
as it is, and if not, what would we change?
Piers
> -----Original Message-----
> From: Rahn, Juergen (Juergen) [mailto:krahn@xxxxxxxxxx]
> Sent: 18 April 2002 07:46
> To: stds-802-3-hssg-serialpmd@xxxxxxxx; 'piers_dawe@xxxxxxxxxxx'
> Cc: greg_lecheminant@xxxxxxxxxxx
> Subject: AW: [802.3ae_Serial] From serial PMD call 17 Apr: need more
> experimental evidence
>
> Hi,
> does this mean that tests have been made? As I still have one TR open
> against the jitter methodology due to the fact of missing
> verification I
> would like to know if there is new information? (we where not
> able to do any
> more of this kind of verification if the method OK).
> However while this setup will generate stress for the
> receiver I still have
> to make the remark that this adding of an unsynchronized
> signal is not the
> kind of impairment you will se on an interface we are
> specifying but is
> simulating something like a scenario of a WDM uncorrrelated
> neighbor channel
> crosstalk, so something completely different. If immunity
> against this leads
> to the fact, that a big margin is allocated, this may also
> help the original
> application but may be generate a waste of performance or
> even generate the
> possibility that real effects may slip through this test.
> Regards Juergen
>
> ----------
> Von: piers_dawe@xxxxxxxxxxx [SMTP:piers_dawe@xxxxxxxxxxx]
> Gesendet: Mittwoch, 17. April 2002 18:45
> An: stds-802-3-hssg-serialpmd@xxxxxxxx
> Cc: greg_lecheminant@xxxxxxxxxxx
> Betreff: [802.3ae_Serial] From serial PMD call 17 Apr:
> need more
> experimental evidence
>