In the simplest type of radio receiver, called a tuned radio frequency (TRF) receiver, the three functions above are performed consecutively: [9] (1) the mix of radio signals from the antenna is filtered to extract the signal of the desired transmitter; (2) this oscillating voltage is sent through a radio frequency (RF) amplifier to increase its strength to a level sufficient to drive the demodulator; (3) the demodulator recovers the modulation signal (which in broadcast receivers is an audio signal, a voltage oscillating at an audio frequency rate representing the sound waves) from the modulated radio carrier wave; (4) the modulation signal is amplified further in an audio amplifier, then is applied to a loudspeaker or earphone to convert it to sound waves. An Audio SWR meter beeps when SWR <1.5, 2, 2.5, 3. Alarms if >3. Audible & Visible Diagnostic messages. If you find water damage then it is likely that the cable will need replacing by a qualified aerial installer. These are not recommendedunless absolutely requiredas they can introduce unexpected reception problems. See our help guide on the different types of amplifiers available.

Satellite ground station receiver - communication satellite ground stations receive data from communications satellites orbiting the Earth. Deep space ground stations such as those of the NASA Deep Space Network receive the weak signals from distant scientific spacecraft on interplanetary exploration missions. These have large dish antennas around 85ft (25 m) in diameter, and extremely sensitive radio receivers similar to radio telescopes. The RF front end of the receiver is often cryogenically cooled to −195.79°C (−320°F) by liquid nitrogen to reduce radio noise in the circuit. The superheterodyne, invented in 1918 during World War I by Edwin Armstrong [10] when he was in the Signal Corps, is the design used in almost all modern receivers, except a few specialized applications. [11] [12] [13] It is a more complicated design than the other receivers above, and when it was invented required 6 - 9 vacuum tubes, putting it beyond the budget of most consumers, so it was initially used mainly in commercial and military communication stations. [15] However, by the 1930s the "superhet" had replaced all the other receiver types above. Lescarboura, Austin C. (1922). Radio for Everybody. New York: Scientific American Publishing Co. pp. 93–94. a b c d e f g h Dixon, Robert (1998). Radio Receiver Design. CRC Press. pp.57–61. ISBN 978-0824701611.Don`t be fooled by competing products claiming fast search times -- if you have a quarter of the matching solutions, it takes less time to finish but it`s not faster. a b Rudersdorfer, Ralf (2013). Radio Receiver Technology: Principles, Architectures and Applications. John Wiley and Sons. pp.1–2. ISBN 978-1118647844. a b Langford-Smith, F. (1953). Radiotron Designer's Handbook, 4th Ed (PDF). Wireless Press for RCA. pp.1223–1224. In digital radio broadcasting systems such as Digital Audio Broadcasting (DAB), the analog audio signal is digitized and compressed, typically using a modified discrete cosine transform (MDCT) audio coding format such as AAC+. [148] a b c d e f g h McNicol, Donald (1946). Radio's Conquest of Space. Murray Hill Books. pp.57–68. ISBN 9780405060526.

In conclusion, these are the best radio tuner for PC which also doubles as radio receiver for PC. However, most of the programs we mentioned are easy-to-use due to their understandable graphical user interface (GUI). a b c d e f g h i j Coe, Lewis (2006). Wireless Radio: A History. McFarland. pp.3–8. ISBN 978-0786426621. a b c d e f Army Technical Manual TM 11-665: C-W and A-M Radio Transmitters and Receivers, 1952, p. 187-190

Terrestrial television receiver, broadcast television or just television (TV) - Televisions contains an integral receiver ( TV tuner) which receives free broadcast television from local television stations on TV channels in the VHF and UHF bands. Marconi Wireless Telegraph Co. of America v. United States. United States v. Marconi Wireless Telegraph Co. of America. 320 U.S. 1 (63 S.Ct. 1393, 87 L.Ed. 1731) Handheld scanner Scanner - a receiver that continuously monitors multiple frequencies or radio channels by stepping through the channels repeatedly, listening briefly to each channel for a transmission. When a transmitter is found the receiver stops at that channel. Scanners are used to monitor emergency police, fire, and ambulance frequencies, as well as other two way radio frequencies such as citizens band. Scanning capabilities have also become a standard feature in communications receivers, walkie-talkies, and other two-way radios. US Patent no. 1405523, Marius Latour Audion or lamp relay or amplifying apparatus, filed December 28, 1917; granted February 7, 1922