How the block diagram of an AM transmitter operates?

The block diagram of AM transmitter is shown in the following figure. The working of AM transmitter can be explained as follows. The audio signal from the output of the microphone is sent to the pre-amplifier, which boosts the level of the modulating signal. This wave is finally passed to the antenna to be transmitted.

What type of oscillator is used in AM transmitter?

Crystal oscillators are the most common type of linear oscillator, used to stabilize the frequency of most radio transmitters, and to generate the clock signal in computers and quartz clocks.

What is master oscillator in AM transmitter?

A master oscillator in the AM transmitter generates a stable sub harmonic carrier frequency. A crystal oscillator used to generate this stable sub-harmonic oscillation. Later the frequency is raised to the desired value by a harmonic generator. The carrier frequency should be very stable.

What are the general components of an AM transmitter?

The transmitter – like most AM and FM radios – can be broken down into four main sections: the oscillator, the modulator, the RF amplifier, and the antenna.

What is the block diagram of an AM transmitter?

Figure (a) shows the block diagram of high-level AM transmitter. In high-level transmission, the powers of the carrier and modulating signals are amplified before applying them to the modulator stage, as shown in figure (a). In low-level modulation, the powers of the two input signals of the modulator stage are not amplified.

What kind of oscillator is used in an AM transmitter?

Usually a crystal-controlled oscillator is used. Low gain, high input impedance linear amplifier. To isolate the oscillator from the high power amplifiers. To provide higher power modulating signal necessary to achieve 100% modulation (carrier power is maximum at the high-level modulation point).

How does a low level AM transmitter work?

Figure shows the block diagram of a low-level AM transmitter. The low-level AM transmitter shown in the figure (b) is similar to a high-level transmitter, except that the powers of the carrier and audio signals are not amplified. These two signals are directly applied to the modulated class C power amplifier.

What kind of signal is an AM transmitter?

AM Transmitter Transmitter input (signal source) is an audio signal.  Speech, music, advertisements The input is modulated to the proper carrier frequency. Modulated signal is amplified and broadcast 19. Transmitter Block Diagram Signal Sourc e Modulato r Power Amplifier Antenna