Explanation: The disadvantage of FM over AM is that
in frequency modulation large bandwidth is required
. While, in case of advantages, FM is less prone to noise interference and has lower power consumption compared to AM. … So it is only used in frequency modulation and not in amplitude modulation.
What is the disadvantage of FM over AM?
Explanation: The disadvantage of FM over AM is that
in frequency modulation large bandwidth is required
. While, in case of advantages, FM is less prone to noise interference and has lower power consumption compared to AM. … So it is only used in frequency modulation and not in amplitude modulation.
What are the advantage and disadvantage of FM over AM?
The main advantages of FM over AM are:
Improved signal to noise ratio (about 25dB) w.r.t. to man made interference
. Smaller geographical interference between neighboring stations. Less radiated power.
Which of the following is the disadvantage of AM?
Following are the disadvantages of AM: ➨The most natural as well as man made radio noise are of AM type. The AM receivers do not have any means to reject this kind of noise. ➨
Weak AM signals have low magnitude compare to strong signals
.
Which of the following is an advantage of FM over AM?
Improved signal to noise ratio
(about 25dB) w.r.t. to manmade interference. Smaller geographical interference between neighboring stations. Less radiated power. Well defined service areas for given transmitter power.
Which is better AM or FM?
FM is less prone to interference than AM
. However, FM signals are impacted by physical barriers. FM has better sound quality due to higher bandwidth. … In AM radio broadcasting, the modulating signal has bandwidth of 15kHz, and hence the bandwidth of an amplitude-modulated signal is 30kHz.
What is difference between AM and FM?
The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (
the number of times each second that the current
changes direction) of the carrier signal is varied.
Why is sound immunity better in FM vs AM?
FM signal is having fixed amplitude and phase and frequency is variable. Noise is generally uniformly spread across the spectrum and varies randomly in amplitude. The change in amplitude can modulate the signal and can be picked up in an AM system. … So
FM is more immune to noise
.
What's the purpose of AM radio?
AM stands for “Amplitude Modulation”, as AM radio signals vary their amplitude
to adapt to the sound information that is being broadcasted through the wavelengths
.
Where do we use FM and AM?
Answer:
FM is used for voice signal modulation and AM is used for video signal modulation
. Answer: We use AM for video signals like TV & for motion picture.FM use for audio signals like radio & for voice signals.
What is the main disadvantage of Compander?
The disadvantage is
a larger possible magnitude for quantization error in the lowest quantization interval
. The lowest- magnitude positive and negative codes have the same voltage range as all the other codes (+ or – one- half the resolution) is called midrise quantization. 21. Define companding.
What are the types of AM?
- Double sideband-suppressed carrier modulation (DSB-SC).
- Single Sideband Modulation (SSB).
- Vestigial Sideband Modulation (VSB).
What are the applications of FM?
Frequency modulation is widely used for FM radio broadcasting. It is also used in
telemetry, radar, seismic prospecting, and monitoring newborns for seizures via EEG
, two-way radio systems, sound synthesis, magnetic tape-recording systems and some video-transmission systems.
Which of the following is a drawback of FM systems?
Burst noise
affects FM systems. Explanation: If the FM received signal is above the FM threshold, burst noise does not affect FM system performance as much as AM systems. It is due to the fact that message amplitude variations do not carry information in FM.
How many sidebands are transmitted in FM?
For small values of modulation index, when using narrow-band FM, NBFM, radio communication systems, the signal consists of the carrier and the
two sidebands
spaced at the modulation frequency either side of the carrier.
What is bandwidth of FM?
FM radio uses frequency modulation, of course. The frequency band for FM radio is
about 88 to 108 MHz
. The information signal is music and voice which falls in the audio spectrum. … If FM transmitters use a maximum modulation index of about 5.0, so the resulting bandwidth is 180 kHz (roughly 0.2 MHz).
