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Re: [Discuss-gnuradio] The output of spectrum_sense must be shifted to
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From: |
Johnathan Corgan |
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Subject: |
Re: [Discuss-gnuradio] The output of spectrum_sense must be shifted to minus |
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Date: |
Wed, 6 Jan 2010 08:39:35 -0800 |
On Wed, Jan 6, 2010 at 05:06, abbasi9999 <address@hidden> wrote:
> Therefore i think there is a shift should be done for the output of the FFT.
> Any body know how much?
In general, this will need to be calibrated, and is dependent on
individual USRP variations, the daughterboard gain, and decimation
settings used with the USRP. It is possible when using usrp_fft.py to
use the --ref-scale option to set the equivalent dBFS sample
amplitude, which will then set 0 dB in the display to that amplitude.
Johnathan