Abstract: A system for delivering signal, such as video signal, over signal carrier, such as twisted-pair cable. The system includes a video source connected to a terminal of the signal carrier and providing video signals thereto. An amplifier is coupled to a second terminal of the signal carrier at the receiving end. A source reference signal generator is connected to a first terminal of a second signal carrier. A second amplifier is connected to a second terminal of the second signal carrier at the receiving end. A comparator is connected to an output of the second amplifier and a receiver reference signal. An output of the comparator is provided to a gain control of the variable gain amplifier.

Abstract: A system for delivering signal, such as video signal, over signal carrier, such as twisted-pair cable. The system includes a video source connected to a terminal of the signal carrier and providing video signals thereto. An amplifier is coupled to a second terminal of the signal carrier at the receiving end. A source reference signal generator is connected to a first terminal of a second signal carrier. A second amplifier is connected to a second terminal of the second signal carrier at the receiving end. A comparator is connected to an output of the second amplifier and a receiver reference signal. An output of the comparator is provided to a gain control of the variable gain amplifier.

Abstract: An outdoor enclosure for housing electronic display equipment constructed of a plurality of extrusions welded to side plates and top and bottom plates which allows easy access to the electronics through a tethered bottom door. The enclosure can house one or more electronic display faces. The front and rear surfaces can be glass, polycarbonate or metal and are held in place by an elastic cord. The enclosure is sealed on the ends by the use of gasketing between the main housing body and the end panels. The design of the enclosure discourages birds from roosting on the front and rear edges. Internally the enclosure provides for the electronics to be mounted on an easily removable plate which incorporates a unique continuous hook. The electronic sub-assembly plate is held in place by a simple elastic hose retainer. Installation and removal of the electronics sub-assembly requires no tools.