How It Works

In 1992, the U.S. Federal Communications Commission (FCC) allocated a spectrum in the "S" band (2.3 GHz) for nationwide broadcasting of satellite-based Digital Audio Radio Service (DARS). Of the four companies that applied for licenses, only two were granted rights to broadcast; Sirius (formerly CD Radio) and XM (formerly American Mobile Radio). Each company has satellites in orbit above the earth to transmit their programming. Programs are beamed to one of the satellites, which then transmits the signal to the ground, where your radio receiver picks up one of the channels within the signal. Signals are also be beamed to ground repeaters for listeners in urban areas where the satellite signal can be interrupted.

In many ways, Sirius has set the tone for the industry, being the first to offer commercial free programming on all its music channels and has larger selection of receivers, adapters and other products. XM has a cheaper subscription fee, at least for its basic plan, which offers much the same fare as its competitor.

Both providers have partnered with automobile manufacturers to offer satellite radio in new car models. And each has systems that will search the channels for your favorite music and alert you when and where the songs are playing. Choosing between the two companies can be difficult since each has its advantages. Here is some information that may help listeners choose between the two.

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Sirius Satellite Radio vs XM Satellite Radio – Which Streams Should You Choose?

Just as many TV viewers have come to consider cable TV a life necessity, so too is satellite radio becoming a mainstream replacement for traditional AM/FM listening. Yes you have to pay for it, but just as with cable, you get way more channels and edgier, more innovative programming. Plus, you don’t lose your favorite station as you travel across the state or country. And satellite players show the artist and name of the song, which is definitely a plus for those who like to know what they’re listening to. XM Satellite radio has extended into the realm of marine accessories wiht marine stereo becoming staellite ready. Visit www.OutlanderDirect to see the new selection of marine stereos that incorporate XM satellite capability. In the U.S. there are just two main players in the satellite radio industry, Sirius and XM. WorldSpace, which has been broadcasting the longest and covers the most area, currently does not offer coverage in the United States. So with just two providers to pick from, one would think that the choice would be easy, but each has its own pluses and drawbacks and the decision usually comes down to budget and personal preferences.

Satellite Radio : Digital Radio Receiving Signals Broadcast By Communications Satellite

A satellite radio or subscription radio (SR) is a digital radio that receives signals broadcast by communications satellite, which covers a much wider geographical range than normal radio signals.

SR functions anywhere where there is line of sight between the antenna and the satellite, given there are no major obstructions, such as tunnels or buildings. SR audiences can follow a single channel regardless of location within a given range.

Because the technology requires access to a commercial satellite for signal propagation, SR services are commercial business entities (not private parties), which offer a package of channels as part of their service —requiring a subscription from end users to access its channels. Currently, the main SR providers are WorldSpace (Intl.), XM Radio & Sirius (U.S.), as part of their each being proprietary and non-compatible signals, requiring proprietary hardware for decoding and playback. Both these and other services have news, weather, sports, and several music channels.

We all have our favorite radio stations that we preset into our car radios, flipping between them as we drive to and from work, on errands and around town. But when you travel too far away from the source station, the signal breaks up and fades into static. Most radio signals can only travel about 30 or 40 miles from their source. On long trips that find you passing through different cities, you might have to change radio stations every hour or so as the signals fade in and out. And it's not much fun scanning through static trying to find something -- anything -- to listen to.