What is amplitude modulation and how does it work?
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the carrier wave is varied in proportion to that of the message signal, such as an audio signal.
How does a modulator work?
Modulation is what takes a signal from low frequencies (the message) and pulls it up to a higher frequency (the carrier). The idea is simple: Multiply your message by a high frequency carrier, such as 680 kHz. Voila, that’s AM radio!
What causes amplitude modulation?
Simply put, an amplitude-modulated carrier is a signal that has been caused to vary in amplitude by multiplication by another, lower-frequency signal. If the amplitude-modulated signal shown here is passed through a frequency analyzer, the following spectrum is the result. The highest peak is the carrier frequency.
What is amplitude modulation PPT?
Amplitude Modulation is a process where the amplitude of a carrier signal is altered according to information in a message signal. The frequency of the carrier signal is usually much greater than the highest frequency of the input message signal.
How to calculate amplitude modulation?
How To Calculate Amplitude Modulation Get the formula. To solve for the amplitude modulation of a given sound wave, you should first known the formula. Get the values. Once you know the values, the next step is to figure out the figures used in the equation. Solving. Interpreting your results.
What are the uses of amplitude modulation?
Amplitude modulation applications Broadcast transmissions: AM is still widely used for broadcasting on the long, medium and short wave bands. Air band radio: VHF transmissions for many airborne applications still use AM. Single sideband: Amplitude modulation in the form of single sideband is still used for HF radio links.
What are the different forms of amplitude modulation?
Types of Amplitude Modulation Double sideband-suppressed carrier (DSB-SC) modulation The transmitted wave consists of only the upper and lower sidebands But the channel bandwidth requirement is the same as before. Single sideband (SSB) modulation The modulation wave consists only of the upper sideband or the lower sideband. Vestigial sideband (VSB) modulation
What are some limitations of amplitude modulation?
An amplitude modulation signal is not efficient in terms of its power usage.