DSB and SSB-SC Amplitude Modulation .
DSB/SSB-SC Amplitude Modulation & Demodulation Trainer has been designed with a view to provide practical and experimental knowledge of Amplitude Modulation / Demodulation technique as practically implemented in Analog Communication system on a SINGLE P.C.B. of size 300 x 400mm.

Object: To Study of
Amplitude Modulation & Demodulation:

  • Generate AM signal by modulation with audio signal generator
  • Measure modulation index of A.M. signal
  • Demodulate AM signal using diode detector(envelope detector)
  • Generate voice signal AM modulation and demodulation using Mic.
  • Observe the effect of DC signal input on AM output
  • Demodulate AM signal by square law detection

# DSB-SC Amplitude Modulation & Demodulation:

  • Generate DSB-SC AM signal
  • Demodulate DSB-SC signal using product detector

# SSB-SC Amplitude Modulation & Demodulation:

  • Generate SSB-SC AM signal
  • Demodulate SSB-SC signal using product detector


  • The board consists of the following built-in parts:
  • IC REGULATED POWER SUPPLY : ± 15 DC and +5V DC at 100mA.
  • AF Modulation signal generator : Sine wave
  • Frequency Range : 300 Hz to 3.4 KHz
  • Amplitude : 0 to 5 Vpp.
  • RF carrier signal oscillator.
  • Frequency Range : 100 KHz to 1 MHz.
  • Amplitude : 0 to 10 Vpp.
  • Local Oscillator : 400 KHz to 500 KHz.
  • Band Pass Filter : 452 KHz to 458 KHz.
  • DC Source Variable power supply to see the effect of DC on the output waveform: - 5 to + 5 VDC
  • Output Audio amplifier with Volume Control.
  • Input Audio amplifier for modulating external signal from Mike or Tape recorder.
  • Double Balanced Amplitude modulator
  • Diode detector.
  • Product detector
  • Low pass filter.
  • Power supply requirement 230V AC, 50 Hz.
  • Mains ON/OFF switch, fuse and jewel light.
  • Dynamic Microphone with 4mm Jack Pin.
  • Loud Speaker with baffle fitted in a box with two metre wire and 2mm Banana pins for connections.
  • 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

Other Apparatus Required:

  • Cathode Ray Oscilloscope 20MHz

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