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AM contours are based on the standard ground wave field strength pattern, the frequency, and the ground conductivity in the area. While the FCC makes FM and TV service contour data readily available, the AM , while unavailable as a separate data file, can be obtained through an AM Query in the resulting 'maps' section of each record (when using ...
After the FCC authorized nighttime operation for many daytime AM stations, WJUN began nighttime coverage of sports events in 1986. For the first 25 years, it ran a MOR (middle of the road) format and block programming consisting of country (6 - 7 am, 11 - 12 AM), Gospel 12:45 - 1:00 PM + weekends), Easy listening (5 PM - Sign off), Polka (12:30 ...
Example of a radio map estimate using STORM, a transformer-based radio map estimator. Signal strength maps quantify signal strength at each location. Formally, a signal strength map can be seen as a function γ ( r ) {\displaystyle \gamma (\mathbf {r} )} that provides a signal strength metric for each location r {\displaystyle \mathbf {r} } .
AM broadcasting stations have different issues, due to using the mediumwave band. Broadcast range in these stations is determined by ground conductivity, and the proper use and maintenance of grounding radials which act as a ground plane for the mast radiators used. Skywaves reflect off the ionosphere at a much greater distance above Earth's ...
A clear-channel station is a North American AM radio station that has the highest level of protection from interference from other stations, particularly from nighttime skywave signals. This classification exists to ensure the viability of cross-country or cross-continent radio service enforced through a series of treaties and statutory laws.
A coverage map may be produced to indicate the area in which a certain signal strength is delivered. [1] Even if it is 100% accurate (which it never is), a major factor on whether a signal is receivable depends very much on whether the receiving apparatus is sensitive enough to use a signal of that level.
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KNBR (680 kHz, "KNBR 680 and 104.5 The Sports Leader") is an AM radio station in San Francisco, California, broadcasting on a clear channel from transmitting facilities in Redwood City, California. KNBR's non-directional 50,000-watt class-A signal can be heard throughout much of the western United States and as far west as the Hawaiian Islands ...