Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In one embodiment, the predetermined key sequence is 9-1-1. Therefore, the sensitivity of an illumination sensor is automatically controlled according to the peripheral illumination, thus improving peripheral illumination sensibility. This provides increased reliability in document processing, particularly when processing involves checks, obtaining electronic images of checks, and check truncation. The reverse taper of the drop lug maximizes the abutment surface and stability of the drop lug when engaging the corresponding lug stop.