A cable trough cover assembly and method of assembly including a cover plate and a hinge piece. The present invention proposes a broadcasting system having a duplicated formatting module. The multiplier circuit has first and second inputs coupled to first and second data inputs of the logic block, and an output, and may include a non-uniform array of sub-circuits. As a result of the particular configuration of the microfluidic device, an assay may performed in a \u201csingle step\u201d without the need for active forces, such as a pressure source, electrokinetic force, etc.