Data Conditioning and Carrier Modulation

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This teaching set is designed to be used with the CT 02 Introductory Digital Communications Teaching package. It allows the work from CT 02 to be extended from a baseband system to consider digital data transmission using a range of data format codes and keying techniques.

Using the workbook students build progressively complex systems using techniques such as simple amplitude, frequency and phase shift keying. They are then introduced to IQ modulation before exploring quadrature phase shifted systems.

A teacher’s solution book is provided with typical results and solutions to student exercises.

Typical topic areas include:

• Non-Return-to-Zero (NRZ).
• Return-to-Zero (RZ).
• Biphase Codes.
• Three-Level Codes.
• Amplitude and Frequency Shift Keying.
• Phase Shift Keying.

Typical activities include: 

• Apply the NRZ forms of data conditioning to an input signal and interpret information contained in data streams.
• Recognize the necessity to provide timing information to synchronize the operation of the receiver.
• Calculate the result of applying RZ coding to an input data stream.
• Compare RZ coding with the NRZ(L) and NRZ(M) methods.
• Apply biphase coding methods to an incoming data stream.
• Apply three-level coding methods to an incoming data stream and compare results with other coding methods.
• Investigate the operation of the main circuit modules necessary to encode and decode three-level codes.
• Outline the operation and characteristics of an ASK modulator and demodulator.
• Investigate the waveforms and characteristics of signals used in phase shift modulation system.
• Compare and identify the characteristics of phase shift modulation and quadrature phase shift modulation systems.