Band pass filter

hello every one …

           i implement the following spectrum  generation 

stimulation
but band pass parameter show error .

File “/home/mahesh/Documents/3110/1/top_block.py”, line 128, in
init
1, samp_rate, 830000000, 840000000, 10000, firdes.WIN_HAMMING,
6.76))
File
“/usr/lib/python2.6/dist-packages/gnuradio/gr/gnuradio_core_general.py”,
line 9544, in band_pass
return _gnuradio_core_general.firdes_band_pass(*args, **kwargs)
RuntimeError: gr_firdes check failed: 0 < fa <= sampling_freq / 2

guude me if any buddy face sane problem

Thanks and regard:
*

MR.Maheshkumar P.
**
*
*call @ 9662784649
*

Hi Maheshkumar,

For your example using a sample rate of 400e6, the low and high cutoff
frequencies need to be between -200e6 and 200e6, not 800+ as you
currently
have them configured.

Try 10e6 for low cutoff and 20e6 for high cutoff.

Regards,

Mike


Mike J. M0MIK BSc MIET
Ettus R. Technical Support
Email: [email protected]
Web: http://www.ettus.com http://www.ettus.com

On Thu, Oct 31, 2013 at 10:54 AM, Maheshkumar P.


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Nevertheless, using a “throttle” block with 400e6 samples/second seems
to be inadequate. The throttle rate (which has nothing to do with the
sampling rate) should be reduced to something the average computer can
deal with when visualizing. Maheshkumar, use something like 100k for the
beginning.

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