Sachi wrote:
Hi, guys
I met some confusions when I tried the usrp_fft and usrp_oscope.
I generate a 2MHz, peak to peak 1V, sin wave using the
Agilent signal generator, and connect it to usrp.
However, the result of usrp_fft always shows a very
strong component at DC, besides the 2MHz. Why is that?
As I recall the FT transforms a 'constant' function into a single point at the
origin, suggesting that your 2Mhz signal is offset from 'zero', either by
an error in the signal generator setup, or in the analog portion of the
A/D.
(I don't have things setup to test with a known data set... )
John Clark
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