- published: 24 Feb 2012
- views: 52463
A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from light emitting diodes to radio. The most familiar example is a voice band modem that turns the digital data of a personal computer into modulated electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover the digital data.
Modems are generally classified by the amount of data they can send in a given unit of time, usually expressed in bits per second (bit/s, or bps). Modems can alternatively be classified by their symbol rate, measured in baud. The baud unit denotes symbols per second, or the number of times per second the modem sends a new signal. For example, the ITU V.21 standard used audio frequency-shift keying, that is to say, tones of different frequencies, with two possible frequencies corresponding to two distinct symbols (or one bit per symbol), to carry 300 bits per second using 300 baud. By contrast, the original ITU V.22 standard, which was able to transmit and receive four distinct symbols (two bits per symbol), handled 1,200 bit/s by sending 600 symbols per second (600 baud) using phase shift keying.
RADIO STATION | GENRE | LOCATION |
---|---|---|
Modem Radio Rock n' Co | Rock | France |
Modem Radio France | 90s,80s,Top 40 | France |
Modem Radio Hits and Dance | Top 40 | France |
Modem Radio Pop Rock | Rock,Pop | France |
Actors: Thurl Ravenscroft (actor), Victoria Jackson (actress), Willard Carroll (writer), Peter Locke (producer), Alfre Woodard (actress), Donald Kushner (producer), Willard Carroll (producer), Eddie Bracken (actor), Brian Doyle-Murray (actor), Eddie Deezen (actor), Jay Mohr (actor), Danny Nucci (actor), Joe Ranft (writer), Timothy Stack (actor), Andrew Daly (actor),
Genres: Adventure, Animation, Family, Fantasy,Actors: Brett Rice (actor), Casey Sander (actor), Barry Williams (actor), Lucas Moore (miscellaneous crew), Richard Moll (actor), Rider Strong (actor), Jillian Amburgey (miscellaneous crew), Soleil Moon Frye (actress), Michael Wayne Thomas (actor), Teresa Ganzel (actress), S. Bryan Hickox (producer), Jack Munn (miscellaneous crew), Patrick Renna (actor), Sharyn L. Ross (editor), Marc W. Havener (miscellaneous crew),
Plot: Young punk Freddie Egan is in a juvenile detention center for the summer. Spoiled rich-kid Frederick Egan III is going to a luxurious summer camp. However, a name mix-up at the bus terminal sends the boys to each other's destinations, and while Eddie gets a taste of the good life, Frederick learns some valuable life-lessons from his stay in jail.
Keywords: african-american, basketball, basketball-game, bus, bus-terminal, cheerleader, identity-swap, judge, juvenile-delinquent, juvenile-detentionActors: Keith Alcorn (miscellaneous crew), Lou Diamond Phillips (actor), Susan Barnes (actress), John S. Davies (actor), Robert J. Castaldo (actor), Robert J. Castaldo (editor), Andy Anderson (writer), Lauren Lane (actress), Andy Anderson (director), Jim Conrad (actor), Tim Hatcher (miscellaneous crew), Doug Bryan (miscellaneous crew), Laura Tabor-Huerta (actress), Alan McFarland (miscellaneous crew), Alan McFarland (actor),
Plot: On a quiet college campus, professor Hobson learns from the dean that a secret society based around hacking has been causing some trouble. Before Hobson can do much investingating, however, he learns that Bobby, one of his star students (and also an active hacker) has been killed. Although Hobson discovers that there really is a secret hacking society that has turned itself into a vigilante gang, he now has the more pressing task of proving to the police that he didn't kill Bobby himself. Will he be able to get to the bottom of this mystery before he gets thrown in jail?
Keywords: college-professor, computer, hacker, hacking, independent-film, murder, one-word-title, pimp, prostitute, urination