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In electronics, an antenna amplifier (also: aerial amplifier or booster) is a device that amplifies an antenna signal, usually into an output with the same impedance as the input impedance. Typically 75 ohm for coaxial cable and 300 ohm for twin-lead cable. An antenna amplifier boosts a radio signal considerably for devices that receive radio ...
Doubling the height of the single DIN, a video display or touchscreen can be fitted to support manufacturer GUIs, Android Auto, Huawei HiCar and/or Apple CarPlay. [3] Double DIN is also written as 2 DIN and double din. For both single and double DIN units, ISO 10487 is the connectors standard for connecting the head unit to the car's electrical ...
RAI broadcasts on Rai Radio 1, Radio2 and Radio 3 FM. This service covers the entire country. Additionally, Rai operates a dedicated traffic news station heavily focusing on motorway viability which trasmits on the fixed frequency of 103.3 FM , Rai Isoradio. A commercial service is provided by radio station RTL 102.5 in cooperation with InfoBlu.
FM broadcasting originated in the United States and was adopted as a worldwide standard. [16] FM broadcasting in stereo in the USA began in 1961 when authorized by the FCC. This led to greater demand for new radio stations and better technology in radios. The growth of hi-fi stereo systems and car radios in turn led to a boost in FM listening.
The most familiar form of radio receiver is a broadcast receiver, often just called a radio, which receives audio programs intended for public reception transmitted by local radio stations. The sound is reproduced either by a loudspeaker in the radio or an earphone which plugs into a jack on the radio.
An FM band expander (band converter, FM converter) is a device used on Japanese car stereo systems to enable them to receive international FM frequencies, when used or grey import Japanese cars are shipped to other markets. Japanese radio bands are between 76 and 90 MHz whereas the international broadcast plan is between 87.5 and 108 MHz.
FM improvement threshold is the point in an FM (frequency modulation) receiver at which the peaks in the RF signal equal the peaks of the thermal noise generated in the receiver. A baseband signal-to-noise ratio of about 30 dB is typical at the improvement threshold, and this ratio improves 1 dB for each decibel of increase in the signal above ...
The IF bandwidth was ±5 kHz, as the only goal at the time was to relay AM radio-quality audio. This transmission system used 75 μs audio pre-emphasis like the main monaural audio and subsequently the multiplexed stereo audio. In the late 1950s, several systems to add stereo to FM radio were considered by the FCC.
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