Two TV Sets on a Single Receiver

With the advent of digital television, it's often necessary to use a separate receiver. If you have several television sets in your house, you have to buy a digital receiver (and accompanying subscription) for each set. The solution described here lets you watch television in two or more places in your home using a single digital receiver, while allowing the digital receiver to be controlled from both locations. The circuit needed for this is powered from one of the two television sets.