A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. The adaptive document displaying apparatus includes: a document analyzing unit analyzing each of a plurality of components included in a document; and a document converting unit converting the document according to the result of analysis and attributes of a display device. An adjustable anchor assembly can be secured onto the tension member opposite to the side on which the fixed pad assembly is attached. An inside wall of the sediment trap is in an annular spaced-apart relation with a tank sump perimeter watt, which together define an annular space interior volume that receives water that overtops the sediment trap inside wall and which receives liquid that overtops the tank sump perimeter wall. The first and second vortex nozzles impinge the first and second rotating fluid flows in a collision chamber, thereby treating the fluid. The handover may be from a third generation partnership project system to a non-3GPP system, or vice versa.