P1394b UTP5 Task Group Meeting Minutes - October 12th 1998

1 Welcome, introductions, apologies

Introductions were assumed from the immediately previous session. An 
apology was received from Alistair Coles.

2 Equalisation

D L Chen presented some results of the performance of the receiver 
equalisation scheme that he had presented at the previous meeting 
(presentation to be placed on the web site). These results were based 
on the use of MLT-3 with PRBS encoding. CWS requested that the 
measurements be repeated using the P1394b NRZ (binary) signalling and 
the P1394b encoding scheme (which limits the run length).

Eric Hannah indicated that he is developing a technique for a 
combination of pre-emphasis and receive equalisation which he intends 
to present at the next meeting.

3 Reach requirements

The previously tabled motion "To delete the requirement that all 
receive circuits must work over all lengths of cable up to 100m" was 
considered. CWS read out an email contribution from Alistair Coles. 
After a shot discussion the vote was taken. DW reminded the group 
that of the attendance requirements for voting. For: 1; Against: 11; 
Abstain: 7. Motion fails.

4 Review of the current specification and open issues

4.1 Equalisation example.

It was agreed that it would be good to include an informative example 
of an adaptive equaliser. D L Chen agreed to check with his company 
(LSI Logic) as to whether the example he had presented can be 
incorporated (block diagram and descriptive paragraph).

4.2 Electrical specification

Eric Hannah indicated that he is carrying out some simulations which 
will assist confirming the values which are currently TBD in the 
specification. His analysis would also cover the jitter budget. CWS 
agreed to check whether the latest FC knowledge on jitter measurement 
techniques has been incorporated into the P1394b jitter budget (this 
applies to all specifications, not just UTP5).

CWS requested further contributions on electrical modelling in order 
to corroborate these values.

It was agreed that the electrical specification would not be aligned 
with the short haul - it would retain the lower launch levels for EMC 
reasons and the more stringent sensitivity.

The current value of BER in the specification was discussed. It was 
agreed to increase this to 10**-12.

 4.3 Testing

It was agreed to add the requirement that installed cable plant 
should be tested according to TIA TSB-67.

A final request is made for contributions on testing. If none are 
forthcoming by the next meeting, then no further testing information 
will be included in the spec.

Present

Dao-Long Chen
Richard Churchill
Michele Dale
John Fuller
John Glenski
Thomas Han
Eric Hannah
Jerry Hauck
Sean Killeen
Steven D Martinez
Angel Mora
Shuji Nagao
Yoshikatsu Nima
Bill Northey
Takayuki Nyu
Ozay Oktay
Bill Prouty
Kevin Ross
Kyozo Saito
Tetsuya Sato
Masood Shariff
Michael Shinkarovsky
Jim Skidmore
Ron Soderstrom
Michael Jonas Teener
Dave Thompson
Satoru Toguchi
Colin Whitby-Strevens (chairman)
David Wooten



--
Colin Whitby-Strevens      email: Colin.Whitby-Strevens@st.com
STMicroelectronics         tel: +44 1454 611500
1000, Aztec West           fax: +44 1454 617910
Almondsbury
BRISTOL BS32 4SQ 
UK

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