Thanks for your kindly reply.
Can you explain more that, both sides from the center frequency of the
input frequency has been cut by a low pass filter.
Doesn't a low pass filter allow the lower frequency to pass?
Thanks,
Rono
On 28/02/11 12:22, Josh Blum wrote:
On 02/27/2011 07:57 PM, rono wrote:
Sorry if the question was re-posted.
Can anyone reply this entry level question?
In complex data representation such as the attached image by grc,
the LPF cut the frequency in both direction(+/- freq)
which the center frequency is 0Hz
http://www.fungkai.com/~howie/sdr/complex_1_basefreq0.gif
When I set the base frequency to a large positive value such as 10MHz,
the cutoff shows on both side apart from the center frequency too.
The baseband frequency parameter only changes the value printed on the x
axis. For example: If you had a usrp source tuned to frequency X, you
would also set the baseband frequency to X -> for display purposes.
-josh
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