DISH will lease you 4 tuners(2 dual tuner receivers) you can buy additional receivers if you want 4 dual tuner receivers.Git said:
The second TV is connected by using coaxial cable just the way a cable company would. Instead of a satellite frequency signal on the cable it is a processed signal like ch60.
DISH dual tuner receivers can use either single or dual cables to the receiver. With Dish Pro Plus technology a single cable with a separator can be used. With Dish Pro or Legacy LNBs dual cables must be used.