Re: 8B/10B code patterns.
Folks - I discovered the spreadsheet I sent before has a mistake in the 10B disparity columns. It is fixed in this version, so discard the previous send. Cell F2 (red) defines the initial running disparity and must be entered manually as "+" or "-". The rest of the 10B pattern will respond appropriately.
As you know, but just to restate it, the 8B level knows nothing about disparity, so programming at the 8B level will not set 10B disparity one way or the other. Disparity gets set only at the 10B level, determined by frame requirements and/or previous data.
Tom
Tom Lindsay wrote:
> Benny - does this help, or do you want something else? If needed, the lookup tables can be built in the "other direction".
>
> The first tab lists +/-10B characters and their binary and 8B equivalents.
> The right tab can be used to build a pattern. Simply list out the 10B D characters and copy down the other columns to fill in the rest of the data. The 10B Hex column can be re-written if you need a different form for BERT loading.
>
> Tom Lindsay
> Vixel
> 425/806-4074
>
> "Christensen, Benny" wrote:
>
> > Hi all
> >
> > Can anyone provide reference/generate to hexcode ASCII file dump for the
> > 8B/10B coded test patterns (i.e. CJTPAT and the other GE specified
> > patterns), so that I can program/download it by my PC into our HP BERT
> > pattern memory (max. 8 Mbit).
> >
> > The BERT has all the PRBS patterns, but one needs to program other
> > user-patterns. I allready have the SDH A1A2 frame + PRBS + CID test
> > pattern.
> >
> > I need the 16 bit hexvalues (words)(ie. like 0x5A, NOT the characters like
> > K28.2 etc.). Please also specify msb/lsb / which bit sent first.
> >
> > Benny
> > --------------------------------------------
> > llllllll ii llllllll llllll
> > ll ll ll ll
> > ll llll ll ll llll llllllllll
> > ll ll ll ll ll ll ll
> > llllllll ll llllllll ll ll
> >
> > GIGA, an Intel company
> > Benny Christensen, M.Sc.E.E, Ph.D.
> > Mileparken 22, DK-2740 Skovlunde, Denmark
> > Tel: +45 7010 1062, Fax: +45 7010 1063
> > e-mail: benny.christensen@xxxxxxxxx, http://www.giga.dk
>
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Name: 8B10B analysis for XAUI.xls
> 8B10B analysis for XAUI.xls Type: Microsoft Excel Worksheet (application/vnd.ms-excel)
> Encoding: base64
> Download Status: Not downloaded with message
8B10B analysis for XAUI.xls