A receiver is equipped with a demodulation circuit for taking a signal indicating broadcast contents of an analog broadcast out of the first and second intermediate-frequency signals, and for taking a signal indicating broadcast contents of a digital broadcast out of the first and second intermediate-frequency signals. In one embodiment, the step of tracking includes the steps of: identifying the region in images subsequent the one image; and comparing the identified regions of the one and subsequent images to determine a change of the region that meets the predetermined IR radiation criteria. The cable is positioned for guided movement within the conduit. A police activity transponder is configured to allow a user to input shift points, read engine rpm data, and provide a user indication.