[ns] using threshold.cc

Hi,

Kindly tell me how to use threshold.cc. After execution how to get the
threshold values?
I am using Cisco Aironet 802.11a/b/g card specifications to get
RXThreshold, Transmit power etc for 802.11a simulation. How i can get
CSThreshold?

2ndly when i use RXThreshold and transmit power according to card
specifications, packets are being dropped. What values should i use for
802.11a different data rates.

Thanks in advance
--
Regards