Delta Modulation

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The CT04 Delta Modulation board is part of the suite of telecommunications products from LJ Create.

The LJ Delta Modulation work board provides students with a complete system to demonstrate the technique of Delta modulation and Demodulation and its limitations, including slope overloading, by varying the parameters of:

• Sampling Frequency
• Sample Step Size
• Input signal frequency
• Input signal amplitude

Techniques can then be explored through the use of Adaptive Delta Modulation to overcome the slope overloading problem. Finally receiver complexity can be simplified by using Delta-Sigma Modulation techniques.

A comprehensive student workbook is included with a supporting teacher solutions book.

Typical topic areas include:

• Delta Modulation.
• Delta Modulation in Practice.
• Adaptive Delta Modulation.
• Delta-Sigma Modulation.

Typical activities include: 

• Measure the voltage and period of a waveform.
• Identify the advantages and disadvantages of a delta modulation system.
• Recognize the operation of a D-type bistable.
• Investigate the operation of a delta modulator.
• Investigate sampling rate and step size and their effects on a delta modulation system.
• Investigate the operation of a delta demodulator.
• Investigate the causes and effects of slope overloading.
• Recognize how an adaptive delta modulator is able to detect the occurrence of slope overloading.
• Recognize how an adaptive delta demodulator can recover the original information signal.
• Recognize the operation and characteristics of a delta-sigma modulator.
• Investigate the operation of a Differential Amplifier.