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The digital television transition, also called the digital switchover (DSO), the analogue switch/sign-off (ASO), the digital migration, or the analogue shutdown, is the process in which older analogue television broadcasting technology is converted to and replaced by digital television.
The digital television transition in the United States was the switchover from analog to exclusively digital broadcasting of terrestrial television programming. It was originally set for December 31, 2006, but was delayed several times due to multiple government acts being enforced on broadcasting companies.
Tactical Single-Channel Radio Communications Techniques (FM 24-18), Headquarters Department of the Army, Washington D.C. 30 September 1987. Radio Operator's Handbook (FM 24-19) , Headquarters Department of the Army, Washington D.C. 24 May 1991.
The term SCR was part of a nomenclature system developed for the U.S. Signal Corps, used at least as far back as World War I.Three-letter designators beginning with "SC" were used to denote complete systems, while one and two-letter designators (such as "BC", for basic component, "FT" for mounting, etc.) were used for components.
The organization that led to the Military Auxiliary Radio System was called the Auxiliary Amateur Radio System (AARS). AARS was created in November 1925 by a few dedicated pioneers in the United States Army Signal Corps led by Captain Thomas C. Rives. The United States recognized radio as a critical mode of communication during World War I.
The Mobile Subscriber Equipment (MSE) system was a tactical communication system created by GTE Government Systems [4]: 393 (later acquired by General Dynamics) for the United States Army. [2] [6] Acquisition began in 1985 for echelons below Corps and down to the battalion level. [7]
A US Army signaller (25Q) erecting a 30-meter mast antenna Royal Navy signaller with signal flags, 1940. A signaller, signalman, colloquially referred to as a radioman or signaleer [1] in the armed forces is a specialist soldier, sailor or airman responsible for military communications.
In United States military communications systems, commercial refile refers to sending a military message via a commercial communications network. The message may come from a military network , such as a tape relay network, a point-to-point telegraph network, a radio-telegraph network, or the Defense Switched Network .