[802.3_100GCU] Channel Measurement Data

[Christopher DiMinico end <CDimi80749@xxxxxxx>]

 

Colleagues,

 

Slide 10 of 18 in ‘moore_01_1111.pdf’ illustrates measurement data I provided of 802.3ba compliant QSFP cable assemblies for the SOLE purpose of establishing baseline noise impairments beyond those currently specified in 802.3ba. These channels have insufficient bandwidth to be considered for 25 Gb/s NRZ.  Please see e-mail below to John D'Ambrosia and the reflector 4/19/2011 attached below.

   

Slide 10 of 18 in ‘moore_01_1111.pdf’ questions the performance of the assembly measurements I provided commenting on their performance for 802.3bj objectives. “Something is going on with some of the cables so they work with PAM4 but not NRZ. What would you expect? A big perturbation between 6.5 GHz and 13 GHz but closer to 13 GHz? Of course!”

 

Again, the channel measurement data I provided are of 802.3ba compliant QSFP cable assemblies for the SOLE purpose of establishing baseline noise impairments beyond those currently specified in 802.3ba.  These channels have insufficient bandwidth to be considered for 25 Gb/s NRZ and were not submitted for that purpose.

 

Regards, Chris DiMinico

 

Subject: Re: [802.3_100GCU] Channel Data page Updated

Date: 4/19/2011 2:01:02 P.M. Eastern Standard Time

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

John, 

 

I'm pleased to make the data available at your request. Please note the channel measurements I submitted, illustrated in diminico_01_0111.pdf, are measurements of 802.3ba compliant QSFP cable assemblies for the SOLE purpose of establishing baseline noise impairments beyond those currently specified in 802.3ba. These channels have insufficient bandwidth to be considered for 25 Gb/s NRZ. I apologize for any confusion in this regard.

 

Regards, Chris

 

 

In a message dated 4/15/2011 10:10:10 P.M. Eastern Daylight Time, jdambrosia@xxxxxxxxxxxxxxx writes:

Dear Study Group Participants,

Please note that the channel data page has been updated to include cable data for 1m, 3m, and 5m from Chris DiMinico from MC Communications / LEONI Cables & Systems. 

 

I would like to thank Chris for making this data available to the Study Group.

 

The URL for the channel data webpage is http://www.ieee802.org/3/100GCU/public/channel.html.

 

Please note that the files are very large.

 

Best Regards,

 

John D’Ambrosia

Chair, IEEE 802.3 100 Gb/s Backplane and Copper Cable Study Group