[ns] customize transmission range, carrier sense range ?

[tdinhtoan]

hi,

It seems that the default transmission range and carrier sense range in  
NS2 are 240 and 550 respectively.

What is the default transmission power in NS2?

I would like to customize the TxRange to 195 and CSRange to 376. How can I  
do?
   + for TwoRay model ?
   + and for pathloss model ?

Thank you very much.

-toan.