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AM has a frequency range of 531 kHz to 1602 kHz and on the other hand FM has a frequency range between 8705 MHz to 108 MHz. If we talk about the bandwidth of AM then it is 1071 KHz and bandwidth of FM is 20.5 MHz.
According to the bandwidth FM should be used for long distance transmission but it is not used for long distance but AM is used fir long distance transmissions. the answer is here.
Long distance transmissions are also decided by the Spectrum of the Signal in frequency domain by doing the Fouriertransform of the Signal.
If we draw the Spectrum of AM waves the we find that their is a main loop in the central part of the spectrum with a high frequency and on the left and right side of this loop their are side loop which are very smaller then the main loop. In FM information can be recover from the main loop only not from the side loops. On the other hand in AM waves all the loops in spectrum is of same size and information can be recover from all the loops.
That is why AM is used for long distance transmission.
Thnx -Vipin Jasoria
What else can I help you with?
What are protocols for long distance communication?
There are 5 types pf protocols used in the computer network.
What are the applications of Time Division Multiplexing technique?
All signal multiplexing techniques were invented to permit a single physical communication channel to carry multiple different signals. This reduces the investment costs in physical communication channels: e.g. long distance telegraph lines, long distance telephone lines, microwave links, orbiting communication satellites, fiber optic cable. Time Division Multiplexing can be implemented using either analog or digital signaling means.
Why was semaphore first used?
Semaphore was first used as a means of long-distance communication, allowing messages to be transmitted quickly over land and sea. Developed in the late 18th century, it utilized visual signals, such as flags or mechanical arms, to convey information between stations. This system was particularly useful for military and naval operations, where rapid communication was essential for coordinating movements and strategies. Its effectiveness in overcoming geographical barriers made it a significant advancement in communication technology at the time.
Why do you not use frequency modulation in long range transmission?
Frequency modulation is not used for long distance transmission because it has the problem of limited band width.
What are the advantages of using digital signals and why?
* Digital signals suffer less interferences than analogue signals. This means that when you listen to a digital signal you won't hear a hissing sound, as within digital signals regenerator circuits are used to clean "noisy" pulses. * Digital signals can be made very short so more pulses can be carried around each second, which means more information can be passed on.
What was the radio used for?
long distance communication
Why FM is not used for long distance communication?
becouse FM is applicable for line of sigth distance only. MAYANK S
What is the use of fiber optics?
Fiber optics is used for long distance communication due to its various advantages..
Information on smoke signals?
Smoke signals is a long form of long distance communication. These signals were used in Ancient China and by the Native Americans and Yamanas.
How did the telegraph influence long-distance communication?
In 1840 Samuel Morse invented the first telegraph this influenced long distance communication by making it a lot quicker and more efficient
What communication device allows us to communicate long distances via telephone?
The telephone IS a long distance communication device.
Advantage and disadvantage of communication technology?
Advantages: Cheap Long distance communication Quick
The earliest form of long distance communication?
smoke signals.
What was the telegraph used to communicate over long distances?
The History of the Telegraph. Since the early days of long distance communication, the technology we use has come a very popular.
How did emperor Charlemagne overcome the great problems of distance and communication in the empire?
Charlemagne overcame problems of distance and communication in the empire by building structures. He also used his sons to help with the communication.
What did Guglielmo Macrconie invent?
A telegraphic system capable of long-distance communication.
Why do you use high frequency signals for communication and why not very high frequencies?
Low, medium and high frequencies is ideal for long distance communication but it is very sensitive to QRM and QRN because only amplitude modulation can be used on this part of the RF spectrum, FM modulation is not possible, where in the higher frequencies, FM (Frequency Modulation) is a beter option but with the drawback of distance overland. VHF, UHF and UUHF can't overcome obstacles like hills, mountains and large buildings, only line of site communication can be used here, although it can be used for long distance in open space IE. in outer space, like satellite communication.
