I am a beginner of Hyperlynx, try to do SI simulation as a reference for my next version of PCB design.
On my current PCB, there are 64 LVDS interfaces, all running at maximum 960Mbps, from eight ADC (ADI AD9279) to a FPGA (Xilinx Virtex-6).
Below is real measurement of one of the LVDS interface ( at 250Mbps, at FPGA side ) :
And below is SI simulation result from Hyperlynx,
as you can see, simulation result is totally different from the real measurement.
stimulus setting as below :
simulation trace :
On the other hand, we had previously assign a 3rd party company to perform SI simulation on these LVDS traces, below are two of the results :
at 480Mbps :
at 960Mbps :
They use exactly the same IBIS models of mine in Hyperlynx(also attached in this post), so I do think my problem is related to parameter setting in Hyperlynx (?).
Any comment is appreciated, thanks in advance.