This first part describes an interference problem and the steps taken towards its identification and cure. This has been achieved without the use of expensive test equipment and is offered as a model for others to copy. By adopting a very methodical approach it has been possible to learn a great deal about the anatomy of interference. How this information has been used is the subject of the second part, to be published next month.rnRSGB members experience significant problems of interference from TV receivers. These are usually solved by replacing the offending TV - which is then out of reach of technical study. Alternatively the inter-personal relationship between the culprit's owner and the victim becomes too strained to allow technical investigation. However, MODIV recently approached the RSGB EMC Committee with an interference problem that appeared after he moved house - and the Panasonic TX-28DT4 TV in his lounge was too old to be returned to the shop.rnHis problem was a complete wipe-out of reception from 3 to 30 MHz when the TV was operating, with interference being strongest in the 7MHz band. The installation layout is shown in Figure 1.
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