Radio+(XM)

=XM Radio Receiver= Tstowe12

Purpose
//What is the fundamental purpose of the device?// To play many different types of broadcast received from satellites in space (Music, News, TV shows ect.)

[|http://www.xm-radio-satellite.com/index.asp?PageAction=Custom&ID=] []

Energy
//What energy transformations are seen in its operation?// This is a form of Kinetic Energy (The energy in motion from one from location to another) The satellites orbits the earth, programs are beamed to the different satellites to broadcast stations. The satellites then transmit the signal to special antennas on homes, cars and portable radios. Terrestrial repeaters throughout the country also receive the signal and help ensure that it's transmitted to receivers, especially in areas with tall building that might block the signal receiver.

Controls
//What sensors/controls are designed into the device?// //GEO Satellites -// XM Radio's ground station transmits a signal to its two active GEO satellites, which bounce the signals back down to radio receivers on the ground. When received are then unscrammbled. A geostationary satellites is any satellite which is placed in a geostationary orbit. Satellites in geostationary orbit maintain a constant position relative to the surface of the earth. Geostationary satellites do this by orbiting the earth approximately 22,300 miles above the equator. This orbital path is called the Clarke Belt, in honor of Arthur C. Clarke.

Materials
//What material(s) are essential to the device?// A needed piceces of material this decives could not do without is a built in antenna. It is key source of how it receives it's electromagnetic waves in order to play different programs.

Science
//What is scientific principle is central to its operation? Delphi Roady XT Boombox This is stand lone powered system, it has a two inch driver and 6 watts of power//

//What does a typical device look like?//



Evolution
//What changes have there been (or could there be) in this device?// There have been many changes through out the years with electronics, such as Xm Radios. From being made from wood to now metal. To only able to be used at home because they were to heavy to now being portable.

Competitors
//What other devices serve a similar purpose?// MP3 players, digital camcorders, DVRs, clock radios, portable DVD players, portable GPS, flat-panel TVs, extended range two-way radios

Partners
//What other devices work in conjunction with this device?// Sirius Radio

Siblings
//What other devices use the same scientific principle? AM Radio FM Radio//


 * What is the antenna made of**

It is a design of a fordable of a radial rib of in a carbon fibre of a gold plate of a mesh stand of that fold it like ribs.The diameter is 12 m and if it is double fold is is small than it is.It is in the high package in the time. It is a 800 -900 MHZ signal range it in the same time 2 time. The time of of the time of MHZ of the range it is antenna.It was in the 1983 when they got the good signal in the same time.In the time it s in the signal so the some of the way it is.


 * antenna** **of the it look like**

It has the is the rib in the carbon gold and it 2 time fold and the same time of the diameter in the same time. So the same time in the you our in the antenna in the rib signal of the time. Of the 1983 of the radial in the good of the 12 m of the meters range. The time of the way in rib in the create in the fold in the new time little rib in the on the tell the was.

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V1N-4811NCR-T7&_user=10&_coverDate=01%2F31%2F1989&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1349358532&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=e580ab9db7340d5782bac4e1a827f96c