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How a radio is made? |
| Date Added: March 10, 2009 06:43:44 PM |
| Author: Raul Costers |
| Category: Media: Radio |
Radios are used to play music or as alarms in the morning and they are also used in cordless phones, cell phones, baby monitors, garage door openers,radar, toys and satellites. Radios also play an important role in communications for fire, police and the military. Although there are many types of radios—clock, car, amateur (ham), stereo—all contain the same basic components. Radios come in all shapes and sizes, from a little AM/FM "Walkman" to a highly sophisticated, multi-mode transceiver where both the transmitter and receiver are combined in one unit. The most common modes for a broadcast radio are now FM (frequency modulation)and AM (amplitude modulation). Other modes used by ham radio operators, industry, and the military are CW (continuous wave using Morse code), SSB (single sideband), digital modes such as telemetry, radio teletype, and PSK (phase shift keying). |
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