<p>
  The LTPDA Toolbox contains a class for creating spectral window objects 
  (see <a href="specwin.html">Spectral Windows</a>). A graphical user interface
  allows the user to easily explore the time-domain and frequency-domain response
  of any particular window.
</p>
<p>
  To start the GUI:
</p>
<div class="fragment"><pre>
    >> specwin_viewer
</pre></div>
or click the appropriate button on the Launch Bay.
<br>
<p>
  You should then be presented with the following figure:
</p>
<img src="images/specwin_viewer.png" alt="Sawtooth waveform" border="3">
<br>