Experiments Included:

  • Study Frequency Modulation using Varactor Modulator
  • Study Frequency Modulation using Reactance Modulator
  • Study Operation of Detuned Resonant Circuit
  • Study Operation of Quadrature Detector
  • Study Operation of Phase-Locked Loop Detector
  • Study Operation of Foster – Seeley Detector
  • Study Operation of Ratio Detector

IT-4103 is designed to Analyze the Techniques of Frequency Modulation & Demodulation using Analog signals. Trainer consists of mainly two types of circuits namely, Modulator & Demodulator. These circuits implement different Modulation & Demodulation techniques.


  • Power Supply Included
  • Required Circuits Tested
  • Each Section Clearly Marked for Input and Output
  • Each Section Works as an Independent Unit
  • Audio Generator Included
  • Amplifier and Low Pass Filter Included

Technical Features:
Audio Generator: Frequency and Amplitude adjustable.

FM Modulator Types:

  • Reactance Modulator
  • Varactor Modulator

FM Demodulator Types:

  • Detuned Resonant
  • Quadrature Detector
  • Foster -Seeley
  • Ratio – Detector
  • Phase Locked Loop
  • Low Pass Filter: 3.4 KHz Cut off Frequency
  • Amplifier: AC Amplifier with adjustable gain
  • Inter-connections: 2 mm gold plated pins

Accessories: Power cord, Experiment Manual, Set of patch cords