Frequency Modulation and Demodulation Trainer

Frequency Modulation and Demodulation Trainer
FM Transmitter and Receiver Trainer has been designed with a view to provide practical and experimental knowledge of Frequency Modulation & Demodulation Trainer technique as practically implemented in Analog Communication system on a SINGLE P.C.B. of size 300 x 400 mm.
Object:
To Study Theory of Frequency Modulation & Demodulation:
Frequency Modulation via varactor / reactance Modulation
Frequency Demodulation via Detuned Resonant/Ratio/Quadrature/Foster - Seeley/Phase locked loop detector
Separate VCO circuit to demonstrate FM waveform
Feature:
The board consists of the following built-in parts:
POWER SUPPLY:
± 12DC IC Regulated power supply
FM Modulating signal generator:
Sine wave
Frequency Range:
300 Hz to 3.4 Khz
Amplitude Range:
0 to 5 Vpp.
Modulator Type:
Varactor modulator (With carrier frequency adjustment):
Reactance Modulator (With carrier frequency adjustment)
Demodulator (Detuned resonant detector):
Quadrature detector
Foster - Seeley Detector
Ratio Detector
Phase locked loop Detector
Mixer/Amplifier:
1 No. (With gain adjustment) Allows FM input signal to be amplitude modulated by a noise input to demodulation.
Low pass Filter:
3.4 KHz. Cut of frequency Amplifier (with adjustable gain)
VCO Circuit:
FM Wave form demonstrate
Test Point: 78
Power supply requirement:
230V AC, 50 Hz.
On Board Switched Faults:
8 Nos.
On Board Amplitude limiter with Amplitude control.
Input - Output and Test points provided on board.
A self contained Trainer.
Effect of noise on the detection of FM signal may be investigated.
Best Quality, reliable terminal/sockets are provided at appropriate places on panel for connections/ observation of waveforms.
Supported by detailed Operating Instructions, giving details of Object, Theory, Design procedures, Report Suggestions and Book References.
Other Apparatus Required:
Cathode Ray Oscilloscope 20MHz.
Patch Cords

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