Pspice problem

[Olympus]

Hi guys, I'm having a problem simulating the following circuit:
http://img194.imageshack.us/img194/986/labtcfe.jpg

I want to set those zener diodes to have a reverse biased voltage of 9.1V and forward biased of 1.2V but I don't know how to do it.

The second problem, is that I can't see, when I simulate, the Graph of those 2 V marks versus the time.

Can Someone help me out plz? I've attached the .sch file.

Thx :)

Edit: Just noticed that R2 and R3 are switched. R2= 10k and R3=20.6k

[berkeman]

Here's the way to do it in MicroCAP SPICE. PSPICE may be similar. Is there anything in the Help files or application notes at the PSICE website?

http://www.spectrum-soft.com/news/fall2000/zenermodel.shtm

Alternately, you can do it as described in "Semiconductor Device Modelling with SPICE" by Antognetti and Massobrio. They build a macromodel with a DC voltage source in series with a standard diode in the forward direction (anode to cathode), and a DC voltage source in series with a diode and resistor in the reverse breakdown direction.

[Olympus]

Thx for the help, I will check it out :)
I didn't find much support on PSpice website about this...