What Everybody Ought To Know About Manuall

Online radio Malaysia, live internet radio

In contrast to a conventional AM/FM station, you receive a web radio station online. In addition to their AM/FM offerings, most radio stations also have a web stream so that they can be reached beyond their frequency-bound broadcast area. In the last few years, the online programs have grown enormously and offer a whole new radio experience. Many web-only radios, which can only be received online, are devoted to a very specific music genre and do not interrupt their programs with advertising or entertainment content. The variety of web radios is almost infinite and offers an extraordinarily varied selection of the most diverse genres, programs and international stations.

The term started to become preferred by the general public in the 1920s with the introduction of broadcasting. It can be seen that the bandwidth, the range of frequencies, contained in each band is not equal but increases exponentially as the frequency increases; each band contains ten times the bandwidth of the preceding band. E have named the apparatus for the production and reproduction of sound in this way the "photophone", because an ordinary beam of light contains the rays which are operative. To avoid in future any misunderstandings upon this point, we have decided to adopt the term "radiophone", proposed by M. Mercadier, as a general term signifying the production of sound by any form of radiant energy... The French physicist Édouard Branly, who in 1890 developed the radio wave detecting coherer, called it in French a radio-conducteur.

All warm objects emit microwaves and the spectrum emitted can be used to determine temperature. Microwave radiometers are used in meteorology and earth sciences to determine temperature of the atmosphere and earth surface, as well as chemical reactions in the atmosphere. Radar sets mainly use high frequencies in the microwave bands, because these frequencies create strong reflections from objects the size of vehicles and can be focused into narrow beams with compact antennas. In most radars the transmitting antenna also serves as the receiving antenna; this is called a monostatic radar. A radar which uses separate transmitting and receiving antennas is called a bistatic radar.

However, it is even easier to listen to your favorite station directly in the browser. All you need is an internet connection, a browser, a free service like radio.net and headphones or speakers connected to your computer. US Federal law prohibits the nonmilitary operation or sale of any type of jamming devices, including ones that interfere with GPS, cellular, Wi-Fi and police radars.

The variety of stations for HD Radio is somewhat greater than via FM. FM frequencies on which the stations are transmitted must be far enough apart from each other. And since only a limited frequency spectrum is available, the number of potential stations in any given broadcasting area is limited. The transmission of HD Radio signals has far fewer restrictions here, which is why more stations can be broadcast in a HD Radio transmission area.

An in-band on-channel technology, HD Radio broadcasts a digital signal in a subcarrier of a station's analog FM or AM signal. Stations are able to multicast more than one audio signal in the subcarrier, supporting the transmission of multiple audio services at varying bitrates. The digital signal is transmitted using OFDM with the HDC (High-Definition Coding) proprietary audio compression format. HDC is based on, but not compatible with, the MPEG-4 standard HE-AAC. It uses a modified discrete cosine transform audio data compression algorithm. It has higher spectral efficiency and more resistance to fading than AM or FM.

Unmanned aerial vehicle – A drone is an aircraft without an onboard pilot, flown by remote control by a pilot in another location, usually in a piloting station on the ground. They are used by the military for reconnaissance and ground attack, and more recently by the civilian world for news reporting and aerial photography. The pilot uses aircraft controls like a joystick or steering wheel, which create control signals which are transmitted to the drone by radio to control the flight surfaces and engine.

In 1895, Guglielmo Marconi developed a radio wave based communication system, demonstrating that morse code signals could be sent over long-distances and, by December 1901, across the Atlantic ocean. On November 2, 1920, the first commercial radio broadcast was transmitted by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA featuring live coverage of the Harding-Cox presidential election. Synthetic aperture radar – a specialized airborne radar set that produces a high-resolution map of ground terrain. The radar is mounted on an aircraft or spacecraft and the radar antenna radiates a beam of radio waves sideways at right angles to the direction of motion, toward the ground. In processing the return radar signal, the motion of the vehicle is used to simulate a large antenna, giving the radar a higher resolution. The program of the vast majority of broadcasters is offered free of charge.

Satellite phone – a portable wireless telephone similar to a cell phone, connected to the telephone network through a radio link to an orbiting communications satellite instead of through cell towers. They are more expensive than cell phones; but their advantage is that, unlike a cell phone which is limited to areas covered by cell towers, satphones can be used over most or all of the geographical area of the Earth. In order for the phone to communicate with a satellite using a small omnidirectional antenna, first-generation systems use satellites in low Earth orbit, about 400–700 miles (640–1,100 km) above the surface. With an orbital period of about 100 minutes, a satellite can only be in view of a phone for about 4 – 15 minutes, so the call is "handed off" to another satellite when one passes beyond the local horizon. Therefore, large numbers of satellites, about 40 to 70, are required to ensure that at least one satellite is in view continuously from each point on Earth. Other satphone systems use satellites in geostationary orbit in which only a few satellites are needed, but these cannot be used at high latitudes because of terrestrial interference.

The receiver uses tuned circuits to select the radio signal desired out of all the signals picked up by the antenna and reject the others. A tuned circuit acts like a resonator, similarly to a tuning fork. The resonant frequency of the receiver's tuned circuit is adjusted by the user to the frequency of the desired radio station; this is called "tuning". The oscillating radio signal from the desired station causes the tuned circuit to resonate, oscillate in sympathy, and it passes the signal on to the rest of the receiver.