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WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm. The program can decode signals with a signal-to-noise ratio as low as −28 dB in a 2.5 kHz bandwidth. [2]
A large-scale beacon project is underway using the WSPR transmission scheme included with the WSJT software suite. The loosely coordinated beacon transmitters and receivers, collectively known as the WSPRnet, report the real-time propagation characteristics of a number of frequency bands and geographical locations via the Internet.
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Its transmitter site is located on the southwestern edge of Tinley Park, Illinois in Will County. [ 3 ] [ 7 ] WLS is a Class A station broadcasting on the clear-channel frequency of 890 kHz with 50,000 watts, using a non-directional antenna fed by a Nautel NX-50 transmitter , with a Harris DX-50 serving as a backup transmitter.
A marker beacon is a specialized beacon used in aviation, in conjunction with an instrument landing system (ILS), to give pilots a means to determine distance to the runway. Marker beacons transmit on the dedicated frequency of 75 MHz. This type of beacon is slowly being phased out, and most new ILS installations have no marker beacons.
Arthur Dubiel is the majority owner, and his son, Matt runs the station. On June 27, 2017, the FCC approved WCKG to move its FM translator, W272DQ, to the top of Trump Tower in Chicago. [25] On April 23, 2018, WCKG changed their format from news/talk/variety to sports, with programming from Fox Sports Radio. [26]
WSBC began broadcasting from WEDC's transmitter site and it began full-time operations. [26] [27] In 1998, the station was sold to Newsweb Corporation for $5,550,000. [28] [29] Some of the station's programs were simulcast on 1470 WCFJ in Chicago Heights, Illinois. [30] [31] In June 1998, WSBC began airing LesBiGay Radio weekday evenings. [32]
WXLC was also used on US Cable Channel Guide, Lake County's only original Electronic Prevue Guide. [ 5 ] WXLC was an affiliate of Dan Ingram 's Top 40 Satellite Survey in the mid 1980s, an affiliate of The Rockin' America Top 30 Countdown with Scott Shannon in the late 1980s and early 1990s, and an affiliate of American Top 40 with Shadoe ...