How to accelerate the simulation with the Transceiver HSPICE model

[Altera_Forum]

Hi, 

 I'm trying to simulate the Transceiver HSPICE model of Stratix IV GX. This Hspice model proposed a high frequency signal(6.5Gbps). But i need simulate a low frequency signal (about 100Kbps) so i changed this model. I just changed the ".param tdrate=6.5e9" to ".param tdrate=100e3" and simulated it during about 100us (.tran 0.01us 100us). It worked but taked a long time. So how can i speed up this simulation? Do i need change/add some ".option" parameters ?  Thanks in advance.

[Altera_Forum]

Please, someone give me some help

[Altera_Forum]

--- Quote Start ---   But i need simulate a low frequency signal (about 100Kbps)   --- Quote End ---    Why would you try using the transceiver at such a low frequency?  If the signal is AC coupled, then it probably will not even work.  Describe what you are trying to do, and members on this forum can provide constructive feedback. Perhaps an alternative solution would be more appropriate.  Cheers, Dave

[Altera_Forum]

At first, thanks for your reply. 

In fact, i want to simulate a Displayport. Now, i geted this transceiver model (Tx and Rx) but i didn't find a DP cable Hspice model (or S-parameter). I had a I2C bus model. Before i get the DP cable model, i want to find how this transceiver model works with my I2C bus. That's the reason why at such a low frequency. I tried to simulate a signal (2MHz) during 6us, it took about 25 hours.

[Altera_Forum]

--- Quote Start ---   i want to find how this transceiver model works with my I2C bus   --- Quote End ---    I2C is not used over transceiver channels, its used over I/O pins.  Your simulations for the transceiver channels should be performed at the data rate of the DisplayPort, i.e., 1.62, 2.7, or 5.4 Gbps.  Your simulations of the I2C bus should just use IBIS models for the regular I/O. However, I2C is so slow, that its hardly worth simulating in HSPICE. If you follow good PCB layout techniques, your I2C interface will work fine.  Cheers, Dave

[Altera_Forum]

I agree with you. It's just because i have not find a Displayport cable model (IBIS/S-parameters/Spice), i try to find what'll be happen if i simulate it with a I2C bus. So when i find the simulation takes a long time with a low frequency signal, i think it's because i don't use this model correctly. 

By the way, do you konw where i can find a DP cable model as IBIS/S-parameters/Spice ? Thanks again.

[Altera_Forum]

--- Quote Start ---   So when i find the simulation takes a long time with a low frequency signal, i think it's because i don't use this model correctly.   --- Quote End ---   And you are correct. The simulation is for designing high-speed signals. The time required to simulate multiple bit transitions of a Gbps signal is significantly shorter than that required to calculate kbps signals ... a million times faster ....    --- Quote Start ---   By the way, do you konw where i can find a DP cable model as IBIS/S-parameters/Spice ?   --- Quote End ---   Try vendor web sites, eg., Tyco, Molex, etc., or contact a distributor FAE and ask.  Cheers, Dave

[Altera_Forum]

I contacted with Molex, L-com and Videk to ask for IBIS/S-parameters/spice model. But they didn't answer me or gave me sth i don't need.