Basic Spectrum Analyzer using NI-DAQ and DSA boards

This example shows how to create a basic spectrum analyzer in LabWindows/CVI
using NI-DAQ functions with a PCI-445X or NI-455X DSA boards.

This example use pure NI-DAQ functions to perform a continuous acquisition 
and displays the acquire data and FFT analysis.

When a device is selected the program auto detects the type of DSA board and
allows you to select the alias-free frequency span you are interested on , the
number of lines of FFT resolution you want and the window type. You can also
select the number of channels and the coupling and gain per channel.

This is an excellent template for any development in CVI using NI-DAQ functions to 
control a DSA board.