For APD sensitivity, I think the B2B measurement is enough, that’s also the typical measurement. The rest thing is the TDP (transmission and dispersion
penalty) issue, which is a parameter for the transmitter.
From: Marek Hajduczenia [mailto:marek.hajduczenia@xxxxxxxxx]
Sent: Tuesday, July 26, 2016 11:05 AM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_NGEPON] Draft of questionnaire on 25 Gb/s APD receiver sensitivity
I also had a question on whether back-to-back measurement only is sufficient to properly characterize the APD receiver sensitivity and give us all
the information we need.
Regards
Marek Hajduczenia, PhD, CCNP CSCO12874393
From: frank effenberger [mailto:frank.effenberger@xxxxxxxxxx]
Sent: Tuesday, July 26, 2016 2:02 PM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_NGEPON] Draft of questionnaire on 25 Gb/s APD receiver sensitivity
Thanks for this draft – I think it is very close.
Regarding the question on “margin”, while I may be asking for too much, it would really be great if we could ask for the standard deviation on the sensitivity. Moreover, we
should clarify that the “sensitivity” we ask for is the mean (or typical) value.
If we could get mean and standard deviation, then we can properly account for spec difficulty vs. yield trade-off.
As it is now, I think there is a potential confusion in that some people report their typical number, while others will report their maximum (worst) sensitivity. And different
people have different levels of pain tolerance. For instance, some may be comfortable with a 1dB margin, while others like 2~3 dB of margin.
Thanks,
Frank E.
From:
이한협 [mailto:hanhyub@xxxxxxxxxx]
Sent: Tuesday, July 26, 2016 1:16 PM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
Subject: [802.3_NGEPON] Draft of questionnaire on 25 Gb/s APD receiver sensitivity
Dear all,
Enclosed find a draft of questionnaire on 25 Gb/s APD receiver sensitivity. Ed, Yong and me summarized test conditions and questions. It could be discussed tomorrow meeting.
Best regards,
Han