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RE: [10GBASE-CX4] comments on latest CX4 revision




Dan,

Has such a correction for impairments been demonstrated at 3.125Gb/s?

Clark

On Wednesday, February 26, 2003 10:11 PM, ddprocurve@antelecom.net [SMTP:ddprocurve@antelecom.net] wrote:
> 
> Hi Clark,
> 
> We discussed this and the conclusion was that there will be some impairment
> caused by the fixturing (loss, etc) but that must be calibrated out by the
> user. We did not want to get into mandating how much loss, what kind of
> SMAs, etc. Rather, we spec the signal at the interface and rely upon the
> user to be able to make that measurement.
> 
> This is consistent with 1000BASE-T and other 802.3 technologies where the
> measurement requires some calibration by the user to compensate for probe
> effects.
> 
> Dan
> >
> >
> >54.7.3.6 Differential Output Template and Figure 54-3
> >The interconnect from the MDI to the scope for measuring against this 
> >template has not been adequately described.  I could not find any 
> >information on the plumbing.  A tight template like this one must be
> spec'd 
> >along with the interconnect hardware.
> >
> >Please consider readily available adapters and cables for this.  I suggest
> 
> >that the test interface be comprised of a 1m, 24AWG cable to connect 
> >between the MDI and a GigaCN-to-SMA adapter board.  If you don't have one 
> >of these boards yet, you will soon!  From the SMA to the scope, we can use
> 
> >short, high quality cable.  This is easy and convenient.
> >
> >
> >Regards,
> >Clark Foley
> >Maxim Integrated Products
> >(503) 547-2018
> >
> >