Asked in Academic WritingElectrical EngineeringExclamatory and Imperative SentencesThe Difference Between
Exclamatory and Imperative Sentences
The Difference Between
What is the technical difference when it comes to the implementation of AM and FM?
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Asked in Satellite Radio
Why do FM radio stations have better coverage than AM stations?
There is no "why", because they don't. -- In the language of radio engineering, "coverage" means how far out from their tower they can reach listeners. AM broadcast stations win that contest hands-down, mainly because of the differences in radio propagation at 1 MHz vs. 100 MHz. -- If you mean the quality, clarity, and crisp cleanliness of the sound, FM wins that one, because of the technical difference between the AM and FM modulation processes.
What is the difference between AM and FM?
AM and FM - Difference AM stands for amplitude modulation. It is the older technology for broadcast radio. In an AM signal, the carrier frequency is fixed and the information (audio or other signal) is transmitted by varying the magnitude of the carrier wave. FM stands for frequency modulation. In an FM signal, the magnitude of the carrier wave is fixed and the information is transmitted by varying the frequency of the carrier. An FM receiver can produce a better signal-to-noise ratio, since lightning and other electrostatic noises in the atmosphere can be mistaken for changes in amplitude of an AM signal, but do not resemble the changes in frequency in an FM signal. This led to FM being used increasingly for music broadcasts, where noise was particularly bothersome. As it turns out, AM broadcast stations were also allocated limited bandwidth, which restricted their ability to transmit high-fidelity audio. FM broadcast frequencies were not so restricted. That meant that FM also had better audio bandwidth as well as better signal-to-noise ratio. However, that was a result of the technical decisions by the FCC (and its equivalent in other countries), not an inherent difference between AM and FM technology. There are of course, additional modulation systems for each type of carrier, but that largely depends on the application. Television (NTSC) uses both AM (picture) and FM (sound). HDTV uses digital modulation for both picture and sound.
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Why the coverage of AM radio is higher than FM radio?
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What are the differences between AM and FM waves?
There is no fundamental difference in the waves. It so happens that in the USA, commercial AM radio broadcasts in a frequency band around 1 MHz, and FM radio broadcasts in a band around 100 MHz, so their frequencies and wavelengths are different. But that has nothing to do with being AM or FM waves. The codes used to manipulate the waves in order to make them carry information are different for AM and FM, but there's no physical difference in the waves themselves.
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The GL trim comes standard with these features. - Power locks - Tilt wheel - AM/FM stereo The GLS trim comes standard with these features. - Power windows - Cruse control - Tilt wheel - AM/FM stereo - Cassette The GLX trim comes standard with these features. - Power locks - Power windows - Tilt wheel - AM/FM stereo - Cassette - Dual front air bags - Leather - Alloy wheels