UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Small bandwidth and negligible noise
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Large bandwidth and severe noise
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Maximum bandwidth and minimum noise
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High modulation index
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Detailed explanation-1: -In the case of FM, Bandwith is large and noise immunity is high that’s why it is used in satellite communication.
Detailed explanation-2: -The Frequency modulated signals are mostly used in satellite communications because FM signals allow the power amplifiers to operate at saturation, therefore making maximum use of available power.
Detailed explanation-3: -The correct reason for this is that Low frequency signal are reflected by the atmosphere but high frequency signals are not, and they go out of the atmosphere, which need to be received by the satellite which sends them back to earth.
Detailed explanation-4: -The frequency modulation index is mostly over 1 and it usually requires a high bandwidth at a range of 200 kHz. FM operates in a very high-frequency range normally between 88 to 108 Megahertz.
Detailed explanation-5: -Most spacecraft communications systems are radio frequency based. They typically operate within the designated Institute of Electrical and Electronics Engineers (IEEE) radio bands of 300 MHz to 40 GHz.