Backoff Time and TX Power

Hi!

I want to purchase 2-3 dozens of wifi APs for a wireless lab setup at
the univ. The problem is, I just want to know if it is possible to
alter the backoff time of a wifi card. If so, can you recommend any
models which provide configurable backoff time? (Johannes Berg
redirected me to here. I hope I am on the right track.) BTW, by
backoff time, I refer to the wait period used in the (default) DCF
mode.


Best.