July 2017
Intermediate to advanced
1988 pages
112h 28m
English
Content preview from National Association of Broadcasters Engineering Handbook, 11th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter8.5
Single-Frequency Networks for DTV Systems
In the past, typical broadcast networks transmitted different local content on each transmitter site. That was true for FM transmitter stations and analog TV transmitter stations as well as most ATSC stations. Today such a principle is called multifrequency networks. Analog TV signals in particular would create ghost pictures if we transported and received those signals via different signal paths. That was one of the reasons for using directional antennas in analog TV. Back then, the availability of free frequencies was not as big a problem as nowadays. Today frequencies are an expensive and rare resource that has to be carefully saved and handled. When digital ...
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