DESIGN,CONSTRUCTION AND TESTING OFA WIRELESS T.V SENDER (500MHZ)

Abstract

This project report is on the design and construction of a . Wlrele.ss 'IV Se.rtdet within the frequcncy range ofUI-IF that can transmit a quality audio and vidco to any UHF TV channel. The task of the S e.:n.det, is to produce at the receiving end an image which is a ' replica of the scene being televised. The Se rtde Y is crystal - controlled, its first stage is crystal controlled Oscillator with a frequency which is 118 the final output frequency. The signal produce by the oscillator drives three stages of frequency doublers and the combined actions of those doublers multiplies the input frequency by eight for a final output frequency of (nominally) 500MHZ. Double tune ' circuits are used between each stage to help reduce spurious outputs that might cause unwanted interference. The method of modulation is similar to the way a conventional A.M transmitter is modulated. In this project work, a study of all the components and stages of operation with their specific system <.:onstrueted are discussed. Suggestions and recommendations for improvement of the project are highlighted. Any other recommendations or suggestion that can improve this work are highly welcome Vlt