Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).
Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver (radio). Stations are often affiliated with a radio network which provides content in a common radio format, either in broadcast syndication or simulcast or both. Radio stations broadcast with several different types of modulation: AM radio stations transmit in AM, FM radio stations transmit in FM, which are older analog audio standards, while newer digital radio stations transmit in several digital audio standards: DAB, HD radio, DRM. Television broadcasting is a separate service which also uses radio frequencies to broadcast television (video) signals.
The FM broadcast band is a range of radio frequencies used for FM broadcasting by radio stations. The range of frequencies used differs between different parts of the world. In Europe and Africa and in Australia and New Zealand, it spans from 87.5 to 108 megahertz (MHz) - also known as VHF Band II - while in the Americas it ranges from 88 to 108 MHz. The FM broadcast band in Japan uses 76 to 95 MHz, and in Brazil, 76 to 108 MHz. The International Radio and Television Organisation (OIRT) band in Eastern Europe is from 65.9 to 74.0 MHz, although these countries now primarily use the 87.5 to 108 MHz band, as in the case of Russia. Some other countries have already discontinued the OIRT band and have changed to the 87.5 to 108 MHz band.
Digital Radio Mondiale is a set of digital audio broadcasting technologies designed to work over the bands currently used for analogue radio broadcasting including AM broadcasting—particularly shortwave—and FM broadcasting. DRM is more spectrally efficient than AM and FM, allowing more stations, at higher quality, into a given amount of bandwidth, using xHE-AAC audio coding format. Various other MPEG-4 and Opus codecs are also compatible, but the standard now specifies xHE-AAC.
Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.
Radio 1RPH 1125 kHz Canberra is a volunteer-staffed AM band radio broadcast station in the Australian Capital Territory serving all of the ACT and surrounding areas of NSW including Queanbeyan, Yass and Michelago, with FM repeaters at Wagga and Junee, and a streaming media on its web site.
Southern Cross Media Group Limited, doing business as Southern Cross Austereo, is an Australian media company which operates broadcast radio and television stations. It is the largest radio broadcaster in Australia, operating 86 radio stations, and has a reach into every state and territory.
101.7 WSFM is a radio station broadcasting in Sydney, Australia. Its main content is commercial music, in particular classic hits from 1960 to about 2000, but with a stronger focus from 1970 to 1995. The station is part of the Pure Gold Network.
7HOFM is one of three commercial radio stations in Hobart, Tasmania, Australia. It commenced broadcasting on 13 August 1930, as the first commercial radio station in its city.
5MMM is a radio station broadcasting in Adelaide, Australia. Its target demographic is the 30-54 age group. Triple M Adelaide is part of Southern Cross Austereo's Triple M Network and broadcasts on the 104.7 MHz frequency.
ABC Radio Hobart is the ABC Local Radio station for Hobart, Tasmania, owned by the Australian Broadcasting Corporation. It currently broadcasts on 936 kHz on the AM band. Originally the station broadcast on 1160 kHz, in 1953 switched to 940 kHz, and in 1978 to the present frequency.
3RPH is a community radio station owned and operated by Vision Australia as part of the Vision Australia Radio network. The station broadcasts a radio reading service to Melbourne, Victoria, with repeater services in Warragul and Warrnambool, Victoria.
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications.
Print Radio Tasmania is a radio station based in Hobart, Tasmania. It is a reading and information service for those persons unable to read or easily access information in print. The station is run and operated by volunteers.
Vision Australia Radio is a network of eight radio stations in Victoria, amongst some other states in Australia. It is owned by Vision Australia. The stations broadcast a range of programs, generally consisting of readings of newspapers and magazines for people unable to read print media. All the stations are operated by a volunteer staff and a small group of employees.
Digital broadcast radio in Australia uses the DAB+ standard and is available in Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Darwin and Hobart. However, after 11 years, regional large cities such as Townsville and Ballarat still do not have DAB. The national government owned television/radio networks, the ABC and SBS, and the commercial radio stations in each market provide many of their services and a few digital-only services on the digital platform. Australia uses the AAC+ codec provided with upgraded DAB+ standard.
The Viewer Access Satellite Television service, or VAST, is a satellite television platform in Australia, providing digital television and radio services to remote and rural areas, as well as viewers in terrestrial black spots. The service using the Optus C1 and Optus D3 satellites. It is partly funded by the Australian Government and managed through a joint-venture between Southern Cross Media and Imparja Television. It is an even more restricted free-to-view replacement for Optus Aurora providing channels which have been absent on the remote service until now. The platform uses only H.264 video encoding and 8PSK, which allows for more lower bit rate channels on the limited transponder space that's available. The EPG uses an MHEG-5 guide instead of the usual more compatible DVB EIT.