Contents
What is FM modulation used for?
Frequency Modulation (FM) is the encoding of information in a carrier wave by changing the instantaneous frequency of the wave. FM technology is widely used in the fields of computing, telecommunications, and signal processing.
What is the function of modulation in transmitter?
A carrier wave is a pure wave of constant frequency, a bit like a sine wave. This process of imposing an input signal onto a carrier wave is called modulation. In other words, modulation changes the shape of a carrier wave to somehow encode the speech or data information that we were interested in carrying.
What are the types of FM transmitters?
1. Directly modulated (Variable Reactance Type) FM transmitter 2. Indirectly (phase) modulated FM transmitter.
What is direct FM transmitter?
In direct FM generation, the instantaneous frequency of the carrier is changed directly in proportion with the message signal. For this, a device called voltage controlled oscillator (VCO) is used. A VCO can be implemented by using a sinusoidal oscillator with a tuned circuit having a high value of Q.
What is the formula for modulation?
The modulation index is ratio of modulating signal voltage(Vm) to the carrier voltage(Vc). The modulation index equation is as follows. m = Vm/Vc. The modulation index should be a number between 0 and 1.
What are the types of FM demodulator?
Slope Detector
What are modulation techniques?
Modulation techniques are methods that are used to encode digital information in an analog world. The 3 basic modulation techniques are as follows: All 3 modulation techniques employ a carrier signal. A carrier signal is a single frequency that is used to carry the intelligence (data).
What is modulation and types of modulation?
will all other factors remaining constant.