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.

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.
• Strongly supported by detailed Operating Instructions, giving details of Object, Theory, Design procedures, Report Suggestions and Book References.

Weight:

• 6 Kg. (Approx.)

Dimension:

• W 412 x H 150 x D 310

Other Apparatus Required:

• Cathode Ray Oscilloscope 20MHz.
• Patch Cords