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Introduction to Spectrum and Network Measurements

Introduction to Spectrum and Network Measurements

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An electrical system normally has one or more input ports and one or more output ports. Figure 1-1 shows a system with a single input and a single output. Electrical devices such as filters, attenuators, and amplifiers fall into this category. Shown at the input is a signal, x(t) and at the output a signal, y(t). A more complex system (a phase lock loop) is shown in Figure 1-2. Although there is still only one input and one output, there are several blocks or subsections of the system, each having its own input and output. (Each block of the system may be considered as another system.) A design engineer thinks in terms of the individual blocks and signals while designing the system. Measurement instrumentation is used in the design phase when the engineer checks the performance of the individual blocks and signals. The signals and system blocks may also be measured in production, and later, when the system is maintained in the field.

Chapter Contents:

  • 1.1 Signals and Systems
  • 1.2 Time Domain and Frequency Domain Relationships
  • 1.3 System Transfer Function
  • 1.4 Advantages of Using Frequency Domain Measurements
  • 1.5 Spectrum Measurements
  • 1.6 Spectrum Analyzers
  • 1.7 Network Measurements
  • 1.8 Network Analyzers
  • 1.9 Spectrum/Network Analyzers
  • References

Inspec keywords: spectral analysers; instrumentation

Other keywords: electrical devices; spectrum measurments; single output; attenuators; electrical system; amplifiers; single input; network measurements; design engineer; measurement instrumentation

Subjects: Network and spectrum analysers

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