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RE: [802.3ae] RE: [802.3ae_Serial] 802.3ae PRBSs are upside down

Be careful, the normal pattern for an Agilent 86130A BERT (and probably
other Agilent BERTS) is an inverted polynomial (according to some CCITT
standard).  If you select the user interface to invert the output data or
use inverted input data, you then get the PRBS pattern without an inverter.

-----Original Message-----
From: THALER,PAT (A-Roseville,ex1) [mailto:pat_thaler@xxxxxxxxxxx]
Sent: Wednesday, March 06, 2002 1:52 PM
To: Tim Warland; THALER,PAT (A-Roseville,ex1)
Cc: Tom Waschura; stds-802-3-hssg@xxxxxxxxxxxxxxxxxx
Subject: RE: [802.3ae] RE: [802.3ae_Serial] 802.3ae PRBSs are upside


Normal = not inverted. Some of the BERT manuals I was loooking at use the
labels "normal" and "inverted" for the choice of whether to invert the
signal. The word crept in from there.


You changed your tag line. Personally, I spend a fair amount of time working
for what I want.

-----Original Message-----
From: Tim Warland [mailto:twarland@xxxxxxxxxxxxxxxxxx]
Sent: Wednesday, March 06, 2002 1:41 PM
To: pat_thaler@xxxxxxxxxxx
Cc: tom_waschura@xxxxxxxxxxxxxxxxxxxxx;
Subject: Re: [802.3ae] RE: [802.3ae_Serial] 802.3ae PRBSs are upside

pat_thaler@xxxxxxxxxxx wrote:

> That is consistant with what I've seen in the sampling of BERTs I've
> at. They all handle both the normal and the inverted pattern.

What defines a normal PRBS31 pattern?

Tim Warland  P. Eng.
Applications Engineer
Quake Technologies   (613)270-8113 ext 2311

Pray for what you want, but work for what you need.