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What is AGC and AFC?
The receiver operates in conjunction with the automatic gain control (AGC) and the automatic frequency control (AFC). The AGC improves the dynamic range of the receiver by maintaining a constant signal level at the input of the ADCs. The AFC improves the receiver sensitivity by producing precise baseband demodulation.
What is the use of AFC?
In radio equipment, Automatic Frequency Control (AFC), also called Automatic Fine Tuning (AFT), is a method or circuit to automatically keep a resonant circuit tuned to the frequency of an incoming radio signal. It is primarily used in radio receivers to keep the receiver tuned to the frequency of the desired station.
What is AGC sound settings?
Automatic Gain Control (AGC) is an audio pre-processor which automatically normalizes the output of the captured signal by boosting or lowering input from the microphone to match a preset level so that the output signal level is virtually constant.
What is primary frequency control?
Primary frequency control (PFC) enables a frequency response to maintain grid stability. This PFC frequency response algorithm replaces the tuning of regular droop speed controls, which are standard on any turbine: Maintains correct frequency for turbine/generator by adjusting the total MW output.
What is AFC control?
Automatic frequency control (AFC) is employed in radio and television receivers, FM transmitters, radar systems, satellite transceivers, and frequency synthesizers to maintain frequency stability.
What is full form AFC?
The Asian Football Confederation (AFC) is the governing body of association football in Asia.
What is the function of Automatic Frequency Control?
In radio equipment, Automatic Frequency Control (AFC), also called Automatic Fine Tuning (AFT), is a method or circuit to automatically keep a resonant circuit tuned to the frequency of an incoming radio signal. It is primarily used in radio receivers to keep the receiver tuned to the frequency…
Is there a circuit diagram for a frequency counter?
The circuit diagram of this can be done using two timers, counters, 8051 microcontrollers, potential resistors, square wave generator, and LCD display. The basic circuit diagram is shown below. The frequency counter uses IC 555 timer to provide clock signals at a precise time interval of one second.
What kind of IC is used in a radio frequency circuit?
We use NE565 (Phase Locked Loop IC) to be base of this circuit, for easy and cheap. A resistive voltage divider is used to set a bias for the input (pins 2 and 3). The input passes through a two-stage high-pass filter, both to effect capacitive coupling and to attenuate the strong signal of the regular channel.
How is a frequency counter used in a microcontroller?
The 16×2 LCD display is used to display the frequency of the output signal in Hertz. The circuit of this can be done by using IC 555 timer and timer/counter of 8051 microcontrollers. To generate the oscillating signals with a duty cycle (99%) with the highest time period of the output signal, the IC 555 timer is used.