1. in a single Dth connection for multiple tv's. in some setupbox (STB) there is a line out facility which will help to have another connection to tv. but you will receive same channel in both of the tv's because the STB is the controler for both tv's.
2. you have to buy second STB and have a spitter ( this is device connect at LNB to share the signal for both STB's) hardware to connect two STB's. there is no need of any dish.
3. the last one is currently runing method of haveing two STB's and TWO LNB's with same dish.