An RF unit comprises a tuner, a demodulator and a mixer. The system provides a common portal and single user interface that, in an illustrated embodiment, are supported by a presentation layer, a legacy applications layer that communicates with the information systems of the disparate business units, and an applications layer that intermediates between the presentation and legacy application layers. If there is an error in the data bits, the checking bit is used to correct the error and the data bits together with the checking bit are written back to the predetermined unit. The whole base station unit is movable up and down inside the tower by the aid of an elevator system. The second primary winding element is wound around the bobbin for inputting a second test current therein. Each leg set includes at least three legs having a foot at their bottom and a head at their top, at least one of the legs being magnetic for attaching to the side wall of the metallic locker.