History of police scanners Essay Example | Topics and Well Written Essays - 1000 words

History of police scanners - Essay ExampleIn the red-brick era, the devices have helped in promoting security, and enhancing quick responses to emergencies. Additionally, police scanners play a crucial role in journalism and crime investigation centers. Therefore, through the application of the police scanners, the world has been compressed to a smaller subject in terms of space and time. However, the evolution of police scanners has undergone trem abolishous changes since their mullion. This essay will cover in details the history of police scanners.The idea of using receivers and transmitters began in the early 20th century where 2-way telegraphy traffic was in commercial use in the Atlantic Ocean. As early as the root of the 20th century, military and naval warships were applying the 2-way form of chat through the installation of both transmitters and receivers in the ships. Therefore, a two-way communication enabled ships that were apart in distance to communicate effective ly. Australia.gov states that the Victorian Police were among the first sectors to invent portable 20-way radio in Australia in 1923 they installed the devices in police cars and used them to replace the previous band boxes that were cumbersome and at times inefficient in communication. However, the initial sets were also bulky and occupied bigger spaces. For instance, they occupied the entire back seat of the Lancia patrol cars.According to Scanner Master, police departments implemented the attend of tunable radio receivers to monitor police take using a low frequency at the receiving end of the AM radio dial around 1700 KHz. They used this frequency to broadcast to their patrol cars regardless of the distance, and the communication equipment proved effective in transmitting signals. Police and fire departments used the FM radio channels that operated between 40 and 155 MHz in the 1960s, which motivated radio developers to develop scanners that could perform speedy tuning funct ions by