Re: [Discuss-gnuradio] Cosmetic Stuff

[Marcus D. Leech]

On 04/21/2012 08:12 PM, William Pretty Security wrote:

Thanks to All of you for the help J

 

Now I am into the cosmetic stuff (= just about done) …

 

With a sample rate of ~90KHz the FFT frequency axis starts at 0 and goes to ~45KHz.

 

I have a band pass filter from 35KHz to 55KHz.

 

Does anyone know how to make the frequency axis start at say 25KHz to 60KHz ?

Still a 45KHz spread, just off set by 25KHz so that 40KHz is roughly centered …

 

It doesn’t REALLY matter, it just look better J

 

Thanks

Well, if you're real-mode sampling, the highest frequency you can deal with is 45KHz.  Nyquist, not just a good idea, it's a theorem :-)

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