In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process. The sidebands carry the information (modulation) transmitted by the signal. The sidebands consist of all the Fourier components of the modulated signal except the carrier. All forms of modulation produce sidebands.
In telecommunications, frequency-division multiplexing (FDM) is a technique by which the total bandwidth available in a communication medium is divided into a series of non-overlapping frequency bands, each of which is used to carry a separate signal. This allows a single transmission medium such as a cable or optical fiber to be shared by multiple independent signals. Another use is to carry separate serial bits or segments of a higher rate signal in parallel.
Medium frequency (MF) is the ITU designation for radio frequencies (RF) in the range of 300 kilohertz (kHz) to 3 megahertz (MHz). Part of this band is the medium wave (MW) AM broadcast band. The MF band is also known as the hectometer band as the wavelengths range from ten to one hectometer. Frequencies immediately below MF are denoted low frequency (LF), while the first band of higher frequencies is known as high frequency (HF). MF is mostly used for AM radio broadcasting, navigational radio beacons, maritime ship-to-shore communication, and transoceanic air traffic control.
Second audio program (SAP), also known as secondary audio programming, is an auxiliary audio channel for analog television that can be broadcast or transmitted both over-the-air and by cable television. SAP is part of the multichannel television sound (MTS) standard originally set by the National Television Systems Committee (NTSC) in 1984 in the United States. The NTSC video format and MTS are also used in Canada and Mexico.
All India Radio (AIR), officially known since 1956 as Ākāsha Vāṇī, is the national public radio broadcaster of India and is a division of Prasar Bharati. It was established in 1930. It is the sister service of Prasar Bharati's Doordarshan, an Indian television broadcaster. Headquartered in the Akashvani Bhavan building in New Delhi, it houses the Drama Section, the FM Section, the National Service, and is also home to the Indian television station Doordarshan Kendra, (Delhi).
Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor". Different sections of the band are used for radionavigational aids and air traffic control.
Radio 2 was a narrowband Australian radio network owned and operated by WorldAudio Limited. The network was broadcast on frequencies between 1611 and 1629 kHz via a series of 50 AM transmitters across Australia, as well as by satellite and through the network's website.
The radio frequency 2182 kHz is one of the international calling and distress frequencies for maritime radiocommunication in a frequency band allocated to the mobile service on primary basis, exclusively for distress and calling operations.
The Voice of Vietnam is the Vietnam national radio broadcaster.
Voice Inversion scrambling is an analog method of obscuring the content of a transmission. It is sometimes used in public service radio, automobile racing, cordless telephones and the Family Radio Service. Without a descrambler, the transmission makes the speaker "sound like Donald Duck". It is called "voice inversion", but the technique operates on the passband of the information and so can be applied to any information being transmitted.
WMLB AM 1690, "The Voice of the Arts", was a radio station licensed to Avondale Estates, Georgia, serving most of the metro Atlanta radio market. WMLB transmitted on 1690 kHz with 10,000 watts daytime power and 1,000 watts at night. The station broadcast an eclectic radio format, playing classical music, folk music, jazz, show tunes, comedy bits, classic country music and some rock and roll. WMLB's sister station is talk radio station WCFO AM, "News Talk 1160." The WMLB broadcast callsign was assigned to the station at 1160 kHz before being transferred to 1690 kHz in 2006 by its present owner JW Broadcasting. The station went off the air early morning May 14, 2018 ; however, the online streaming continued to play music, hourly news, and station ID/show bumpers until May 15.
XEQIN-AM/XHSQB-FM is an indigenous community radio station that broadcasts in Spanish, Mixtec, Zapotec and Triqui from San Quintín in the Mexican state of Baja California.
An international distress frequency is a radio frequency that is designated for emergency communication by international agreement.
RTÉ Radio is a division of the Irish national broadcasting organisation Raidió Teilifís Éireann. RTÉ Radio broadcasts four analogue channels and five digital channels nationwide.
NXDN is an open standard for public land mobile radio systems, that is systems of two way radios (transceivers) for bidirectional person-to-person voice communication, exclusively for use by police, fire, ambulance and other public safety organizations. It was developed jointly by Icom Incorporated and Kenwood Corporation. It is an advanced digital system using FSK modulation that supports encrypted transmission and data as well as voice transmission. Like other land mobile systems, NXDN systems use the VHF and UHF frequency bands.
Voice of Malaysia was an international radio station operated by Radio Television Malaysia. The station broadcast in 8 languages and aired press releases, news reviews, economic, current affairs, Malaysian music, sports and live public affairs programs.
Voice of Han Broadcasting Station also known as Voice of Han Chinese Broadcasting Station was founded in 1942 by the Ministry of National Defense. It is headquartered on Xinyi Road in the Zhongzheng District of Taipei, Taiwan. Its online broadcasting service and website are currently blocked in Mainland China.
Voice of the Strait, Founded in August 24, 1958. the predecessor is the PLA Fujian Front Line Broadcasting Station, established in Yuandang Street No. 15, Gulou District, Fuzhou city, Fujian province, People's Republic of China. is composed of People's Liberation Army opened stations, mainly for the Taiwan radio, broadcast radio the Mandarin and Minnan language dialect program, now has 5 broadcast channels, also set up Chinese classical network radio. The platform is provided with the official website of the network.
Fu Hsing Broadcasting Station is a state-run radio station sponsored by Republic of China Armed Forces, located on the campus of Ming Chuan University in Taipei, Taiwan and is operated by the Ministry of National Defense. Its website is currently blocked in the People's Republic of China.
