Mixed Signal Analyzer is an application that is part of Mixed Signal Blockset. It is not a separate product nor a toolbox, so it does not appear in any licensing information. There are a number of ways you can launch Signal Analyzer; selecting it from the Apps tab is the easiest way to do so, as you can see pictured below. If you want more information on Signal Analyzer, please see the link below.
Mixed Signal Analyzer
If it's not appearing in his application section even when it is fully expanded, make sure Simulink, Signal Processing Toolbox, DSP System Toolbox, and Mixed Signal Blockset are installed and see if they are, see if you can launch it with the command "mixedSignalAnalyzer" in the MATLAB Command Window.
