Ever wonder how this whole satellite radio thing works? I mean, it seems to be THE thing now. Many auto manufacturers are installing satellite radio receivers in their new automobiles, and there are home and portable models available through your favorite electronics outlet. But what is it? How does it work? Why should I pay for radio?

You pay for TV, dont you?

Once, in those long gone days of yore, cable television operators offered us television, which we had happily been receiving for free through big tree-branchy things on our roofs, for a fee. Many people scoffed at the idea of paying for 30 channels when they received four or five, gratis. Well, just look at us now cable TV, satellite TV, 500 channels not quite filling us up. So lets stop asking questions about why you should pay for satellite radio, and lets find out how the dern thing works.

Well, how does the dern thing work?

Lets start by looking at the type of radio you are used to. AM radio broadcasts at a frequency range from 535 kilohertz (kHz) to 1700 kilohertz (1.7 MHz). FM broadcasts between 88 MHz to 108 MHz. Without getting too technical, one hertz is basically one cycle per second. So FM radio waves transmitted at 88MHz are cycling 88 million times per second. This seems like a lot, but is actually relatively slow. Slower cycles require larger antennas to transmit and to receive them. Also, radio station antennas are stationary and earthbound, and are therefore limited in range. At higher cycles, smaller antennas suffice. Cell phones range from 824 MHz to 1990 MHz (1.99GHz), depending on the type of service; this is a much faster cycle, and therefore a smaller antenna is used. Satellite radio is broadcast at 2.3 GHz, so your car or portable receiver has no trouble picking up the signal. There have also been great advances in antenna technology, which provide us with a relatively small, flat antenna rather than a dish that would have to be constantly adjusted to point toward the satellite as we drove around town picking up kids from soccer practice.

All them numbers hertz my brain.

Lets lay megahertz and gigahertz aside for a moment. In addition to those higher frequencies, satellite radio signals come from, you guessed it, satellites. These satellites are in a geosynchronous orbit, which is an orbit that keeps the satellite always above one location on the planet, making it stationary relative to the earth. The satellite receives a digital signal from the ground station and bounces it back to us. Because the signal is digital, it can be compressed and beamed out packed full of additional data (disguised as 0s and 1s), and received by any satellite radio receiver tuned to the signal. Satellite radio receivers can pick up the broadcast from anywhere in the coverage area (meaning the whole US) because the satellite is orbiting at about 22,200 miles (35,000 km) above the earth, which allows for a greater dispersion of the signal. Its analogous to water flowing from a showerhead. An inch from the showerhead, the water is a relatively tight stream. At the other end of the shower, the water sprays all over the wall, and gets on the bathroom floor, causing your wife to yell angrily about the mess. Satellite radio beams work in much the same way. The radio signal is much more widely dispersed 22,000 miles from the satellite that sent the signal. So with satellite radio, you can listen to the same station as you drive from New York City to Los Angeles, whereas traditional radio has a range of only about 30 to 40 miles. And thanks to repeaters, or signal boosters, placed in urban areas, you can receive generally uninterrupted signals even driving through cities with large buildings and thick bridges.

Hey, thats kind of cool!

But wait! Theres much, much more! The digital signal can carry much larger packets of data, and satellite radios are equipped with chipsets, or processors, that can decode that data. So satellite radios not only play the music, but also decode and display information containing the song title, album, artist, and genre. Satellite radio owners can also choose from hundreds of stations, which allows for specialization, just like your cable or satellite TV. In the same manner that you can get the HBO Comedy Hits of the Brahman Caste of Nepal Channel, and Tasmanian Worm Wrestling on ESPN 127, you can receive niche music, comedy, news, and sports broadcasts on your satellite radio. Pick your genre: any decade since the 40s, Rock, Country, Urban, Jazz, Blues, Dance, Latin, World Music (e.g. Chinese, Indian, African), Classical, Kids, and even news, sports, comedy, and talk. You can also tune in to any sub-genre of the above; for example, in the Rock category you can listen to soft, heavy, classic, deep cuts, acoustic, instrumental, and even unsigned acts.

Maybe I should get me one of them there satellite radios

Now that you know how it works, you can listen for the sheer pleasure of it – without all those nagging technical questions churning in the back of your mind. Go get you one.

About the author:
Albert Medinas has developed and maintains the website Satellite Radio Galaxy, which answers the most common questions people have about Satellite Radio. Please visit us at http://www.satelliteradiogalaxy.comtoday.

Written By: Albert Medinas

How does satellite radio work? To understand how satellite radio works you must first understand how analog radio works. Analog radio works by broadcasting the radio frequency to local transmitters and then on to the listener. Satellite radio works similarly but instead of using stationary transmitters with limited range to broadcast their media to the people, they use mobile Satellites.

Satellites are equipment that orbit the earth and can pick up and transmit signals globally instead of just in a limited area. In the satellite radio category a satellite bounces the transmitted radio frequency off of the satellite and out to the millions of satellite radio listeners around the world. This has increased the satellite radio industry and has made satellite radio a staple media avenue in our everyday lives. Does this help you to understand the question of how does satellite radio work?

A user such as myself or you, who is interested in satellite radio purchases a satellite radio device whether it be stationary or portable, we purchase the desired satellite radio service from whichever service provider offers us the best variety of programming. Once the subscription to this service is established, the device is programmed into a database of devices that are allowed to receive specific radio transmissions from specific satellites. This entry into the database then sends a signal to the device to decrypt satellite frequencies, providing the user with audible satellite radio reception. This explains the question of how does satellite radio work?

Many service providers may use different marketing gimmicks to gain a customer base, claiming to have better coverage or what not. When it comes down to it, The only difference which could be considered is the limitations put on the satellite radio by the databases and what programs and filters any individual service provider may be using to limit the access their customers have to the satellite radio feed. Service providers may offer special features, or special programming which is solely controlled by their databases and the servers they use to transmit the satellite radio feed. You rarely hear of a service provider explaining to the customer the answer to the question of how does satellite radio work?

If a user fails to pay for their subscription to the satellite radio feed, just as with any utility nowadays, the service provider may then send a signal to the device, removing its rights to decrypt satellite radio transmissions. Many technologies in the past, prior to the radio technology have used satellites to widen the spectrum of their services, such as telecommunications such as cell phones. The principal of each service is relatively the same in the fact that a person uses a device such as a satellite radio, or cell phone, to request a transmission through a service providers database. If the subscription is paid for the transmission is allowed from the satellite to the user giving us satellite capable radio devices. I hope I have helped answer the question how does satellite radio work?

About the Author:

Satellite Radio HQ talks about the history of satellite radio, the equipment you’ll need, the satellite radio channels you can receive and much more.

Written By: Carl Walker