Check out this video showing the key essentials about how to use a spectrum analyzer: controls, operation, examples . . . and some top tips from industry experts.
The video starts by explaining the controls on the spectrum analyzer and then moves on to show how some of the basic measurements can be made. It also details other measurements like phase noise, using spectral masks and much more . . . All you need to know about how to use a spectrum analyzer.
More details about how to use a spectrum analyzer and what the controls do can be found here: http://www.electronics-radio.com/articles/test-methods/spectrum-analyzer/how-to-use-spectrum-analyzer-operation.php