Re: [Discuss-gnuradio] Someone the calculation the Resolution Bandwidth (RBW), USRP2 + RFX900 with and usrp2_fft.py

[Marcus D. Leech]

On 07/19/2012 04:55 PM, Julio Hector Aguilar Renteria wrote:

Hi, All
Someone the calculation the Resolution Bandwidth (RBW), USRP2 + RFX900 with and usrp2_fft.py ?

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Julio Hector Aguilar Renteria:

You'll generally find when communicating with other sentients on this planet that questions asked should generally be in the form of
  complete thoughts, with enough surrounding context to make a coherent answer more likely.  I realize that English is not your
  first language, but unfortunately, most people here are English speakers, and struggle to understand your questions.

I *think* what you're asking is about the effective RBW of an FFT-based spectral display. There are notes here:

http://www.ni.com/white-paper/3983/en

Which you could have found with Google in about 10 seconds.

Really, the RBW of an FFT-based spectral display is:   input-bandwidth/FFT-length

That has nothing to do with your hardware or even your software, but rather is just an essential, emergent truth of the way FFTs work.

-- 
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org