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The Synchronized Beacon Project (SBP) is an effort to deploy coordinated beacon transmitters on 50 MHz using a one-minute transmitting sequence of PI4, CW, and unmodulated carrier. Since modern beacon transmitters are multi-mode and frequency-agile, beacons that normally transmit on other time-multiplexed modes such as WSPR can take part in the ...
The CW covers just over 98 percent of television homes in the United States, with network affiliate over-the-air coverage in all of the top 100 Nielsen-ranked markets. [1] Stations are listed in alphabetical order by city of license. A blue background indicates an affiliate originating as a digital subchannel.
The network operated on 14.1 MHz and the beacon format remained unchanged. [3] In 1995, work began to improve the existing beacon network, so it could operate on 5 designated frequencies on the high frequency band. The new beacon network used Kenwood TS-50 transceivers keyed and controlled by an upgraded beacon controller unit.
Stations listed with the superscript identification CW+ are broadcast or cable affiliates of The CW Plus, a programming service distributed mainly to areas ranked among the 110 smallest U.S. television markets, which alongside CW network programming, carries syndicated and brokered programs acquired and scheduled by the network.
The list of frequency ranges is called a band allocation, which may be set by international agreements, and national regulations. The modes and types of allocations within each frequency band is called a bandplan ; it may be determined by regulation, but most typically is set by agreements between amateur radio operators.
The World Administrative Radio Conference (WARC) bands are three portions of the shortwave radio spectrum used by licensed and/or certified amateur radio operators. They consist of 30 meters (10.1–10.15 MHz), 17 meters (18.068–18.168 MHz), and 12 meters (24.89–24.99 MHz).
Because the propagation on 10 meters can vary drastically throughout the day, propagation beacons are very important to gauge the current conditions of the band. With some differences in each ITU Regions and also from country to country, the beacon sub-bands fall between 28.100–28.300 MHz. ITU Region 1 is generally 28.190-28.225 MHz and ITU ...
The single letter beacons can be classified into two groups, "cluster beacons" and "channel markers". A beacon "P" exists in both groups. A third group, called FSK beacons, is now extinct. The following sections list the beacons active as of December 2007, according to published listeners’ reports.