By Robert A. Witte
ISBN-10: 1613530145
ISBN-13: 9781613530146
This re-creation of Spectrum and community Measurements permits readers to appreciate the elemental thought, relate it to measured effects, and practice it while developing new designs.
This complete therapy of frequency area measurements effectively consolidates all of the pertinent conception into one textual content. It covers the speculation and perform of spectrum and community measurements in digital platforms. It additionally presents thorough insurance of Fourier research, transmission traces, intermodulation distortion, signal-to-noise ratio and S-parameters.
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Extra info for Spectrum and Network Measurements
Example text
Cooley and J. W. Tukey in 1965. Although it is often implied that there is just one FFT, in reality an entire class of algorithms are commonly referred to as the FFT. An FFT algorithm gains a significant speed advantage over the DFT by carefully selecting and organizing intermediate results. Ignoring finite arithmetic effects, the results are the same whether an FFT or a DFT is used. The number of computations required for a DFT is on the order of N2, where N is the number of samples, or record length.
000 Hz A typical network measurement showing the transmission characteristics of a low-pass filter. Network analyzers are available in two main varieties: scalar and vector. Scalar network analyzers (SNAs) provide only magnitude information (no phase information) and have tended to be less expensive to implement. As vector network analyzers (VNAs) have decreased in cost, the VNA has largely displaced the SNA in the marketplace. A typical VNA is shown in Figure 1-11. Figure 1-11 A 2-port network analyzer with a frequency range of 100 kHz to 3 GHz.
Keysight Technologies, Inc. 7 Combined Spectrum/Network Analyzers Some instruments combine the spectrum analyzer and network analyzer in one instrument (Figure 1-12). This hybrid approach is a natural one, since the same instrument user often needs to perform both spectrum and network measurements. Furthermore, the block diagrams and technologies used in the two types of instruments are similar enough that combining the two instruments can be done at a reasonable cost. The instrument shown in Figure 1-12 has a compact, handheld form factor, which is especially useful for field service applications.
Spectrum and Network Measurements by Robert A. Witte
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