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2012/02/27

Difference Between Analog and Digital

There are a lot of differences between analog and digital cell phones. Analog signal is very reliable, but not as far reaching as digital. Here are some other differences between Analog and Digital.

Modulation - Analog phones turn the sounds you make into the phone directly into variations of radio signals. The signal is the projected to the cell towers and then transferred to the receiving cell phone. Digital phones encode the sounds into a binary stream. On the other end, the sound is decoded and translated and transferred to the speaker.

History - Analog signals have been used in phones since the 1980s and before that CB (Citizen’s Band) radios have been running on analog since their inception. However, digital has taken the lead in technology.

Signal Strength - Analog signal is notoriously less reliable than digital. Digital signal is able to extend farther and reach more area than analog. Digital is also able to penetrate buildings a lot better than analog.

Sound Quality - Analog sound is much clearer than digital. Many users who have dual transmission phones will switch to analog service to get better sound quality. They will only usually use analog service when there is good service provided.

Signal Usage - Digital is more versatile. Analog has been used in radio transmission since the early 1900s. Digital, however, is able to transmit not only cell phone signal, but television and satellite as well as other signals.

Discussion: What kind of phone do you have? How do you like it?

Cited: http://telecom.hellodirect.com/docs/Tutorials/AnalogVsDigital.1.051501.asp

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