DSB and SSB-SC Amplitude Modulation

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

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

• 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

• Cathode Ray Oscilloscope 20MHz