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DPCM / ADPCM Modulation Demodulation Trainer

DPCM / ADPCM Modulation Demodulation Trainer
DPCM / ADPCM Modulation Demodulation Trainer
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Product Code : 40625
Brand Name : Tesca
Product Description

Order Code-40625 is an Advance Digital Communication Trainer System that helps one under stand various Digital Modulation and Demodulation Techniques. Various functional block diagrams are provided on-board as an aid for Teaching/Training. These Kits are provided with various Test Points to visualize the signals on Oscilloscopes.


  • Receiver Clock generated by PLL method.
  • Demodulation is done using PLL and Envelop Detector Method.
  • Switch faults are provided to study its effects on circuits.
  • Block Description screen printed on PCB.
  • In-Built Power Supply.


  • To study DPCM modulation and Demodulation.
  • To s tu d y ADPCM modulation Demodulation.
  • To study Quantization Error.
  • To study voice communication for DPCM / ADPCM (Optional).
  • To study Effect of Switch faults.


  •             Sine Wave Generator

o    Provides Sine waveform output using IC 74164.

o    Frequency of Sine wave is 500 Hz with variable Amplitude of max.0-4Vp-p

  • ·         Data Clock Generator

o    Jumper selectable clock with amplitude of 5V.

o    Clock of frequencies 64 KHz, 128 Khz, 256 KHz and 512KHz.

  •          Sampling Clock

o    Sampling Clock is generated using IC 4016.

o    Sampling Clock Frequency of 16 KHz and Amplitude of 5V.

  •          On-board features

o    DPCM modulation using sampler, quantizer and linear predictor.

o    Onboard Buffer is provided using Lf353.

o    DPCM demodulation using linear predictor, Integrator and Low pass Filter.

o    On-board Low pass filter using Tl084.

o    Block Description Screen printed on glassy epoxy PCB.

  • ·        Interconnections

o    All interconnections are made using 2mm banana Patch cords.

  • Test points are provided to analyze signals at various points.
  • All ICS are mounted on IC Sockets.
  • Bare board Tested Glass Epoxy SMOBC PCB is used.
  • In-Built Power Supply of +5V/150mA, ±12V/250mA with Power ON indication
  • Attractive enclosure.
  • Set of 2mm Patch cords for interconnections.
  • User's Manual with sample experiments programs.