Did you see the answer I posted <A
href="http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=506500000008000000D2BD0000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0";>here</A>.
The driver available won't teach you about the instrument - you'll
have to learn that yourself, but it will provide the means to get
readings into your program. Because it's an IVI driver, the
measurements and settings are going to be common to the spectrum
analyzer class of instruments so you may have to do a little bit of
custom programming if there are specific features of the 4402 that you
need to access but you should get a good starting point with what's
there.
