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Amateur First Grade required an essay-type examination and five (later ten) words per minute code examination before a Radio Inspector at one of the Department's field offices. This class of license was renamed Amateur Class in 1927 and then Amateur First Class in 1932. Amateur Radio licensing in the United States began in mid-December 1912.
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
Title 47 is extremely diverse in what it controls. Radio broadcasts consist of amplitude modulation (AM) and frequency modulation (FM) stations, noncommercial radio stations, and low-powered broadcast stations, to name a few, all are administrated by the policies in Title 47 of the Code of Federal Regulations.
Amplitude modulation ( AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in ...
X code, used by European military services as a wireless telegraphy code in the 1930s and 1940s; Z code, also used in the early days of radiotelegraph communication. Other. Morse code, is commonly used in Amateur radio. Morse code abbreviations are a type of brevity code. Procedure words used in radiotelephony procedure, are a type of radio code.
Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
KIPR / KFOG – Power 92 Jams – Urban contemporary. KHTE-FM - 96.5 The Box - Urban contemporary. KOKY – 102.1 KOKY – Urban adult contemporary. KPZK – Praise 102.5 – Urban contemporary gospel. KZTS - Rejoice 1380/105.5/103.3 - Urban Gospel. KWCP-LP - KWCP-LP 98.9 The Mix - Urban Adult Contemporary / Classic Hip Hop.
A Fresnel zone ( English: / freɪˈnɛl / fray-NEL ), named after physicist Augustin-Jean Fresnel, is one of a series of confocal prolate ellipsoidal regions of space between and around a transmitter and a receiver. The primary wave will travel in a relative straight line from the transmitter to the receiver. Aberrant transmitted radio, sound ...