[SI-LIST] PCI-X in Specctraquest

Hi,
I'm simulating a PCI-X system that connect 5 "planar" load on my board.
I'm doing pre-layout simulation with Specctraquest expert.

Step1: calculating Bufferdelays
I run simulations with IBIS models + standard test loads (datasheet = PCI-X
spec)
I extracted Bufferdelays (min,max for rise and fall)

The simulations settings are correct. the IBIS model is OK.

Now:
Tval min from the datasheet is LESS tha the minimum bufferdelay.

Can anybody help me to understand that fact??

Bufferdelays = when the driver waveform crosses Vtfall or Vtrise when the
ibis is connected to the standard test load.


Thanks
Lucas


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