Spectrum Analyzer Basics
白皮书
Introducing the Spectrum Analyzer
A simple way to describe a spectrum analyzer is a frequency-selective, peak-responding voltmeter calibrated to display the RMS value of a sine wave. Although a spectrum analyzer displays power, it is a power meter. A signal analyzer can calculate power when a sine wave's peak or average value is known and the resistance across the value measured is known. This white paper describes the basic signal analyzer and how it has evolved considering today's digital technology and digital signal processing that provides many more capabilities.