you're in a valley, you may have trouble receiving many stations. We charge a modest licensing fee for commercial use of our coverage background-color: #ccc; } A coverage map may be produced to indicate the area in which a certain signal strength is delivered. Black Radio Month; Articles. MOTOROLA, MOTO, MOTOROLA SOLUTIONS and the Stylized M Logo are trademarks or registered trademarks of Motorola Trademark Holdings, LLC and are used under license. nearby buildings (multipath interference), interference from other Radio Station Coverage Maps. Although this may seem unrealistic for typical situations today, when combined with the above threshold it is considered a good proxy for providing coverage to more sensitive modern receivers used without external rooftop antennas. Just select a city on the map, review the full frequency list and click on the station name to listen online. algorithms that the FCC uses when trying to predict coverage of radio Can I put it on my website? However, these will be the same, Protected Service Contours for FM and Low Power FM (LPFM) stations (light blue), 60 dBu secondary service contours for FM translators (pink). However, the maps do provide a useful approximation of what service may be anticipated. If you are looking for radio coverage map predictions for broadcast, telecoms or amateur radio then you have found the right site! Conversely, the use of sensitive equipment, high gain antennas, or simply being located on high ground can yield good signal strengths well outside the indicated area. These sheets can have two purposes at a radio station. Using an antenna with higher gain will give much better results. These maps are drawn using engineering data from the FCC. Boulder, Colorado, for example, has relatively flat land to the east, the size, color, or other characteristics of the maps. GNNradio, Coverage Map, Coverage Map. Information about AM and FM broadcast radio stations is available at the Audio Division on the FCC's website. min-width:400px; The 2.0 mV/m contour is also shown (green); for Class B stations this defines the nighttime protected service area. border: 1px solid #ccc; min-width:200px; strength contours respectively. <! These maps are cool, how are they drawn? for(i=881; i<=1079; i=i+2) j++; /* Style the tab */ height: 1200px; the station in each direction. ©2017. For satellite networks, a coverage map is often known as a footprint The HAAT is calculated in all directions coverage area: directional antenna patterns and ground conductivity. Assuming the coverage map is predicted correctly with an appropriate propagation model, the biggest cause of discrepancies with respect to real, achieved coverage are the assumed receive antenna height and receiver sensitivity. However, there are many factors that contribute to radio reception. *Coverage estimation based on a Motorola XPR5550 40 watt mobile radio; coverage may vary depending on radio model. Assuming the coverage map is predicted correctly with an appropriate propagation model, the biggest cause of discrepancies with respect to real, achieved coverage are the assumed receive antenna height and receiver sensitivity. If there is red coloring on nearby ridges then the signal often reflects well enough into non-colored areas. } Learn how and when to remove this template message, The Transmission Gallery: Index of UK TV coverage maps, An example of a crowd-sourced coverage map, https://en.wikipedia.org/w/index.php?title=Coverage_map&oldid=948730069, Articles lacking in-text citations from April 2015, Creative Commons Attribution-ShareAlike License, This page was last edited on 2 April 2020, at 18:40. There are two factors that might give an AM station an odd looking For satellite networks, a coverage map is often known as a footprint. Based on testing of other sites and field checking by RR forum members the range of -106 dBm to -80 dBm was chosen for the maps. All other colors should indicate a strong enough signal to receive outdoors. min-width:150px; AM Nighttime Skywave Service: Coverage resulting from skywave propagation of AM nighttime signals is rather complex and we only touch on it briefly here. The receiving antenna height of 10m dates from the 1950s when receivers were relatively insensitive and used rooftop antennas. However, the maps do provide a useful approximation of what service may be anticipated.
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