Help Mixer ang VGA cascade simulate

[zhaozenghui]

I desige a front-end RF receiver ,I want to simulate mixer ang vga cascade parameters in ADS .any one can help me ?I can solve this problem for long time !!

Added after 4 hours 31 minutes:

No one could help me ?

 

[kspalla]

you can use system blocks to do this.
Go through the examples in ADS