FM Transmitter and Receiver Trainer has been designed with a view to provide practical and experimental knowledge of Frequency Modulation / Demodulation technique as practically implemented in Analog Communication system on a SINGLE P.C.B. of size 300x400mm.

Object:

• To Study Theory of Frequency Modulation & Demodulation:
• Frequency Modulation via varactor / reactance Modulation.
• Frequency Demodulation via Detuned Resonant / Ratio / Qudrature / 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 : 230VAC, 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.
• Good Quality, reliable terminal/sockets are provided at appropriate places on panel for connections/ observation of waveforms.
• 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