RE: [EFM] 10/29 EFM FEC Conf Call
Vipul,
Bad naming convention on my part.
Laser on time should be read as total guard band.
Split ratio should be read as number of polled ONUs.
I leave it to the group to decide whether the guard band should be
calculated as:
Laser On + AGC time + CDR lock time + Laser Off or
Laser On + AGC time + CDR lock time;
as a smart OLT may overlap adjacent Laser On and Laser Off times, thus
decreasing the guard band size.
I'm reattaching the spreadsheet with the fixed naming convention.
Ariel
> -----Original Message-----
> From: owner-stds-802-3-efm@majordomo.ieee.org
> [mailto:owner-stds-802-3-efm@majordomo.ieee.org] On Behalf Of
> Vipul Bhatt
> Sent: Thursday, October 31, 2002 8:21 AM
> To: 'EFM TF'
> Subject: RE: [EFM] 10/29 EFM FEC Conf Call
>
>
>
> Ariel,
>
> A couple of quick clarifications, please.
>
> You've defined a variable called "laser on time", but you
> mean the sum of laser off time, laser on time, AGC settling
> time and CDR lock time - is that correct?
>
> Also, your spreadsheet refers to "split ratio", but your
> analysis is valid for the general situation where it doesn't
> have to be the physical number of splits; it can be
> interpreted as number of guard bands (or slots or grants) -
> is that correct?
>
> Perhaps these interpretations are obvious to some, but I
> wanted to be clear because we may be discussing this topic in
> the general session on the 14th. Thanks.
>
> Vipul
guard band requirements.xls