I have tried to get an answer on this before without getting a straight answer. I guess your interested in knowing if the TV money is calculated on the past seasons salaries or if they are calculated on the once that are when the offseason updates players salaries and so on. I'll try to dig around in it some and see if i can find something out.
I'm not sure where I read this, unfortunately, but I'll try to look as well. I seem to remember reading that the TV contract was based on the salaries as calculated in the offseason update, and I want to say that it was something like 40% of the total salaries (divided by 16 for each team).