# Re: [10GBASE-T] The channel model

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Hi Chris,

Just how much fun is it to model the coiled and the 'not coiled' cables?
roger

At 12:38 PM 1/14/2003, Chris DiMinico wrote:

>Xiaopeng,
>
>Worst case channel models for category cables are specified in TIA and ISO
>cabling standards.
>Given that one of our objectives is to operate over ISO 11801 cabling we
>should use the cabling
>standards (ISO and TIA) channel specifications as our 10GBASE-T model
>baseline (whenever
>possible).
>
>For 1000BASE-T, the channel models we used in the matlab simulations
>consisted of measurements
>(magnitude and phase) of cabling channels scaled to the envelope of the
>worst case function specified.
>
>
>Regards,
>
>Chris
>
>
>
>----- Original Message -----
>From: <xichen@marvell.com>
>To: <stds-802-3-10gbt@ieee.org>
>Sent: Tuesday, January 14, 2003 2:44 PM
>Subject: [10GBASE-T] The channel model
>
>
> >
> > I would like to propose the following channel and noise model.   Then we
> > can work together to come up with a model that all of us agree on.
> >
> > 1.  Channel insertion loss model: refer to the RLCG model on page 47 of
> > T1E1.4/2000-002R6.  Then calibrate the insertion loss (100m) at 100MHz to
> > 21dB for CAT-6 and 24dB for CAT-5/5E.
> >
> > 2. NEXT model:  ~f^(1.5)n^(0.6)  where n is number of disturbers. In our
> > case, n=3.  Then calibrate the NEXT at 100MHz to -31dB for CAT-5E
>and -40dB
> > for CAT-6.
> >
> > 3. ELFEXT model:  ~f^(2)n^(0.6)  where n is number of disturbers. In our
> > case, n=3.  Then calibrate the ELFEXT (100m) at 100MHz to -19dB for CAT-5E
> > and -24dB for CAT-6.
> >
> > 4. ANEXT model:
> > CAT-5E: max[-65, -38+15log10(f/1e8)] dB
> > CAT-6:  max[-65, -41+15log10(f/1e8)] dB
> >
> > 5: Tranformer model: please contribute
> >
> > Xiaopeng
> >
> >
> >
> >
> >

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