What is the main difference between AM and FM?
| Difference Between AM and FM | |
|---|---|
| Amplitude Modulation (AM) | Frequency Modulation (FM) |
| Has poor sound quality, but can transmit longer distance | Has higher bandwidth with better sound quality |
| The frequency range of AM radio varies from 535 to 1705 kHz | The frequency range of FM is 88 to 108 MHz in the higher spectrum |
What are sidebands of an AM wave compare AM with FM wave?
In amplitude modulation (AM) , the amplitude of the carrier is modulated as per the message signal. The other aspects of the carrier wave such as frequency phase etc. remain constant. On the other hand, in frequency modulation (FM), only frequency of the carrier wave changes while amplitude, phase etc.
How is an AM receiver different from an FM receiver?
AM receiver receives AM wave and demodulates it by using the envelope detector. Similarly, FM receiver receives FM wave and demodulates it by using the Frequency Discrimination method.
Why is FM signal better than AM?
It has a lower bandwidth so it can have more stations available in any frequency range. 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.
What are the advantages and disadvantages of AM and FM?
Advantages and Disadvantages of Frequency Modulation
| Advantages | Disadvantages |
|---|---|
| Power Consumption is less as compared to AM. | More complicated receiver and transmitter |
| Adjacent FM channels are separated by guard bands. | The antennas for FM systems should be kept close for better communication. |
Why is FM is better than AM?
Each FM station is allocated 150 kHz of bandwidth, which is 15 times that of an AM station. This means that an FM station can transmit 15 times as much information as an AM station and explains why music sounds so much better on FM.
What are the advantages and disadvantages 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.
What are the advantages 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.
- Well defined service areas for given transmitter power.
What are the merits of AM compared to FM?
The advantages of AM radio are that it is relatively easy to detect with simple equipment, even if the signal is not very strong. The other advantage is that it has a narrower bandwidth than FM, and wider coverage compared with FM radio.