What is high and low level modulated 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 is Amplitude Modulation transmitter?
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 wave is varied in proportion to that of the message signal, such as an audio signal.
What is SSB transmitter?
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently.
What is high level Amplitude Modulation?
In High level Amplitude Modulation system, Modulation is done at high power of carrier and modulating signals so Power amplifiers are used to boost the carrier and modulating signals before modulation. Collector modulation method is the example of High level Amplitude Modulation.
What is Amplitude Modulation Mcq?
Amplitude modulation : When amplitude of carrier wave is changed according to information signal is called amplitude modulation. e.g. All India Radio Mumbai (1044 KHz). Amplitude modulation is done by the electronic circuit called modulator.
What is the advantage of low level modulation?
An advantage of low level modulation is that less modulating signal power is required to achieve a high percentage of modulation.
What are types of transmitter?
Types of level transmitters and how they operate…
- Radar fill level transmitters. Radar fill level transmitters, use radio wave emissions just like radars.
- Ultrasonic level transmitter.
- Guided Microwave Level Transmitters.
- Magnetic Level Transmitters.
- Capacitance Level Transmitters.
- Hydrostatic Level Transmitters.
What are amplitude modulator circuits?
The generating circuits for AM wave are called as amplitude modulator circuits. The modulator circuits are classified into two categories: Low level modulation. High level modulation.
What is low level modulation?
Low level modulation: The block diagram of a low level AM transmitter is shown below. The RF crystal oscillator is most stable mechanical device suitable to generate high frequency carrier signal of particular frequency. The amplified modulating signal is applied to the modulator signal along with carrier.
How is amplitude modulated signal transmitted using an antenna?
The amplitude modulated signal is then transmitted using transmitting antenna. The transistorized modulator circuits can be used for low level modulator due to the low power which is to be handled. The low level transmitter circuit does not require a large AF modulator power so its design is simplified.
Why transistorized modulator circuits are used for low level modulator?
The transistorized modulator circuits can be used for low level modulator due to the low power which is to be handled. The low level transmitter circuit does not require a large AF modulator power so its design is simplified.