SCANNER AUDIO - Lásd search for suspects in the kidnapping (5:31)

Lásd - The search for suspects in the kidnapping (5:31) Members of the Los Angeles County Sheriff to pursue a possible kidnapping suspect. The search of the vehicle is fast becoming a foot chase on the road where the suspect went down. A scanner is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them, and then continuing scanning when that frequency is silent. Many scanners cover the non-radio bands between 30 and diffusion951 MHz FM, although there are models that cover most of the radio spectrum and use other modulation types. Early explorers were slow, cumbersome and expensive. Today, modern microprocessors have enabled scanners to store thousands of channels and monitor hundreds of channels per second. Newer models can follow trunked radio systems and decode APCO-P25 digital transmissions. Both models used and desktop are available. Scanners are often used to monitor police, fire and emergency medicalservices. Scanners developed from earlier radio frequency tunable and fixed frequency received at a time. Systems non-radio such as those used by public safety agencies do not transmit continuously. With a fixed radius in a single frequency, much time could pass between transmissions, while other frequencies can be turned on. Sequence analysis of multiple monitors radio channels programmed, or search for user-defined frequency limits. The search stops on a...