Successful VSA Analysis Using an Oscilloscope
应用文章
An Organized Approach to Making Scope/VSA Measurements
Many RF engineers are reluctant to use a scope to analyze a signal’s spectrum and modulation characteristics because of the potential that signal aliasing will corrupt the measurements. But good quality frequency domain measurements are achievable with
a good scope, good VSA software, and an organized approach to the measurements that account for aliasing with a selection of sampling modes. Using this approach allows the designer to make RF-type measurements at baseband, on multi-channel designs, or with a scope simply because it is the most convenient measurement tool available.
This application note outlines an organized approach to making spectrum and modulation domain measurements with a scope and VSA software. This method has proven to be successful for reducing set-up errors and increasing the quality of the measurement results. The steps in this method are given here and explained in the following pages.