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The receivers or listeners connect directly to these servers via the streaming URL. The capacity of a server always has a technical limit, called slots, so the number of simultaneous listeners is limited. The large web radios do not only use one streaming server, but have flexible networks that can also serve many simultaneous listeners. There is actually a two-way connection between the sender and the receiver. The streaming server can technically count how many devices are currently connected.

Collision avoidance system – a short range radar or LIDAR system on an automobile or vehicle that detects if the vehicle is about to collide with an object and applies the brakes to prevent the collision. Italy explored radio in 1924, followed by Japan, Mexico, Norway, and Poland in 1925. All these countries varied in how they authorized and organized radio services, with governments usually playing a far more central role than was the case in the United States. Radar fuze – a detonator for an aerial bomb which uses a radar altimeter to measure the height of the bomb above the ground as it falls and detonates it at a certain altitude. Unless otherwise stated, all municipal services have migrated to the SLATER P25 trunked system. Amateurs developed the means and simply began to broadcast, sometimes preannounced but often not.

In the US, the two reception modes will continue to operate in parallel for some time. All major Malaysian radio stations to enjoy music and much more. WHA began as a physics department transmitter, but as early as 1917 it was sending wireless telegraph agricultural market reports by Morse Code to Wisconsin farmers. WHA, the first American educational outlet, probably began voice broadcasts in early 1921, though several other universities soon initiated stations with similar aims. Charles (“Doc”) Herrold began operating a wireless transmitter in conjunction with his radio school in San Jose, California, about 1908.

With an AM/FM or HD Radio, you can listen to the radio even without an Internet connection. Online radio or web radio always requires a data connection for the transmission of the current radio program. The selection of programs is then limited to the radio stations in the respective broadcast area. This means that offline radio does not offer the same huge variety of stations as web radio.

A rotating dish antenna sweeps a vertical fan-shaped beam of microwaves around the airspace and the radar set shows the location of aircraft as "blips" of light on a display called a radar screen. Airport radar operates at 2.7 – 2.9 GHz in the microwave S band. This causes the aircraft to show up more strongly on the radar screen.

Sophisticated systems used in recent years use satellites to track the animal, or geolocation tags with GPS receivers which record and transmit a log of the animal's location. Basically, a distinction is made between HD Radio and internet radio even though both convert digital information back into sound. For HD Radio, the stations need special transmitters to broadcast the signal. This signal has a geographical range depending on the transmission power. There is also no two-way connection between the transmitters and the receivers. A transmitter can be received by any number of devices within its transmission area.

However, the word internet Radio also refers to the device that is capable of receiving and playing radio streams. The internet radio can replace the traditional radio device in the kitchen. Most devices have an integrated database that contains the stream URLs of radio stations. Some models also have additional built in FM and DAB+ transmitters.