exporting s parameter from NA to ads

i am using a uwb transceiver(3-10 ghz) chip. i am going to use na to find the s parameters behaviour of it's rx and tx. now i want to use those s parameters in my ads simulation. in ads there is a way to do that using s2p files (do not now much about this) but how to get s2p files from na. can someone tell me how can i do that.

thnx in advance.

What NA are you using?