Instrumentation
The most common instrument used in any EMC test lab is the spectrum analyzer. The spectrum analyzer is a swept-tuned superheterodyne device, although fast Fourier transform (FFT)-style analyzers are becoming more common. FFT analyzers can capture single-shot type events but often have limitations. Examples include limited frequency range it can measure, limited sensitivity to low-level signals, and limited dynamic range of the measurement. There have also been recent developments in real-time spectrum analyzers (RTSA), which use a combination of a superheterodyne receiver, FFT processing, and fast update rate.
Preview this chapter:
Instrumentation, Page 1 of 2
< Previous page Next page > /docserver/preview/fulltext/books/ew/sbew510e/SBEW510E_ch3-1.gif /docserver/preview/fulltext/books/ew/sbew510e/SBEW510E_ch3-2.gif