The invention of radio was a landmark in the world of broadcasting. In today's digital age, satellite radio has ushered in a new era of radio communications. This type of radio has revolutionized the industry and changed the way that people listen to the airways.
It works by sending a digital radio signal to a communications satellite. As a result, satellite covers a wider area than traditional radio signals, which typically span only 30 to 40 miles from their source. In contrast, satellite transmits its signal more than 20,000 miles away from its source. The quality of satellite radio broadcasts is also superior to that of terrestrial radio, since the signal is digital.
On some channels, the music controller or disc jockey will choose, say, fifty minutes worth of music, will listen to it in order to determine that the quality and the order are correct and then let the computer play it over the airwaves. This allows ten minutes every hour for the news and then the sequence can be repeated automatically.
Satellite transmission uses digital recordings and each station is encoded on a different frequency. Similarly, each decoder, say, in your car or your home needs to recognize and decode each channel separately too. This coding and decoding is done extremely quickly, in fact in what is called 'real time'.
The resulting binary or digital code is then translated into analogue signals so that your speakers can replay it. This process produces sound which is just about of CD quality. The transmitting satellites are in a geo-static orbit at 23,000 miles above the equator and have a large footprint which is the name given to the area of ground that is capable of receiving their broadcasts.
Many automobile manufacturers now include satellite radio receivers in the dashboard of new vehicles along with terrestrial radio antenna; in addition, many car companies offer a one year free trial of satellite services as part of their incentive for purchasing a new vehicle. In recent years, portable music devices have also begun to offer satellite radio services.
In the coming years, it will be interesting to see where satellite takes its listeners next. Indeed, this exciting new technology is becoming a part of everyday media culture.
It works by sending a digital radio signal to a communications satellite. As a result, satellite covers a wider area than traditional radio signals, which typically span only 30 to 40 miles from their source. In contrast, satellite transmits its signal more than 20,000 miles away from its source. The quality of satellite radio broadcasts is also superior to that of terrestrial radio, since the signal is digital.
On some channels, the music controller or disc jockey will choose, say, fifty minutes worth of music, will listen to it in order to determine that the quality and the order are correct and then let the computer play it over the airwaves. This allows ten minutes every hour for the news and then the sequence can be repeated automatically.
Satellite transmission uses digital recordings and each station is encoded on a different frequency. Similarly, each decoder, say, in your car or your home needs to recognize and decode each channel separately too. This coding and decoding is done extremely quickly, in fact in what is called 'real time'.
The resulting binary or digital code is then translated into analogue signals so that your speakers can replay it. This process produces sound which is just about of CD quality. The transmitting satellites are in a geo-static orbit at 23,000 miles above the equator and have a large footprint which is the name given to the area of ground that is capable of receiving their broadcasts.
Many automobile manufacturers now include satellite radio receivers in the dashboard of new vehicles along with terrestrial radio antenna; in addition, many car companies offer a one year free trial of satellite services as part of their incentive for purchasing a new vehicle. In recent years, portable music devices have also begun to offer satellite radio services.
In the coming years, it will be interesting to see where satellite takes its listeners next. Indeed, this exciting new technology is becoming a part of everyday media culture.
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