Spectrum analyzer parameters

Mainly talks about the relationship spectrum span, Resolution BW, sweep time, FFT size,
noise floor calculation, how to do RMS averaging to smooth the data and so on

http://zone.ni.com/devzone/cda/tut/p/id/3622
http://dsnra.jpl.nasa.gov/technical/spectrum_analyzer/sweeptime.html
http://zone.ni.com/reference/en-XX/help/371361E-01/lvanlsconcepts/average_improve_measure_freq/
http://digital.ni.com/public.nsf/allkb/862567530005F09C862567210074EA10

Here is "Labview analysis concept"
http://digital.ni.com/public.nsf/allkb/862567530005F09C862567210074EA10