Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

From serial PMD call, 17 April




RIN measurement filter
----------------------
After discussion, a RIN measurement filter in the 10-12 GHz range was
preferred to the default 7.5 GHz, as for RIN, higher receiver bandwidth is
"worse".
*** Question to all: does actual RIN measurement hardware allow this or are
you constrained by filters provided by the test equipment manufacturer?
We'd like to know if the main types/makes of commercial equipment out there
could cope.

Interworking 1310nm <-> 1550 nm
-------------------------------
Probably feasible.  Could be seen as an "extra performance" extension like
20km 1GE transceivers vs. standard's 5 km.  Propose take no action within
the standard.

Delay maximum
-------------
Clause 44.3 refers.  Little interest or understanding here.  May concern the
PMA (clause 51) more than the PMD.  Why specify the PMD/PMA to a few hundred
BT (UI) when the link adds up to millions?  Is there a total delay limit
needed by the higher levels?  David to raise on reflector in separate email.

dB(OMA) vs. dB(OMA/2)?
----------------------
Discussion of whether something "like" the traditional mean power value
(OMA/2) is more familiar (good) or too similar (misleading).  David Kabal to
poll the serial reflector.

Next meeting
------------
Usual time and place proposed.

Piers