DPCM ADPCM Modulation Demodulation Trainer

DPCM ADPCM Modulation Demodulation Trainer .
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.

FEATURES:

• 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.

LIST OF EXPERIMENTS:

• 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.

SPECIFICATIONS:

• 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