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Re: [Discuss-gnuradio] Filter error

From: Michael Dickens
Subject: Re: [Discuss-gnuradio] Filter error
Date: Wed, 05 Jun 2019 10:36:50 -0400
User-agent: Cyrus-JMAP/3.1.6-650-g74f8db0-fmstable-20190604v3

Hi Sneha - You need to take a look at the command being issued (from the debugging traceback) in the file "/home/sneha/My_waveform/past work/transmit.py", line 250. The code is clearly is not setting the filter initialization parameters correctly! Without seeing your code I think nobody here can say much more. Hope this is useful! - MLD

On Wed, Jun 5, 2019, at 10:35 AM, Sneha vasan wrote:
Hi everyone,

Can anybody guide me on this???.. I am using x310 with sampling rate of 1MHz.

Traceback (most recent call last):
  File "/home/sneha/My_waveform/past work/transmit.py", line 414, in <module>
  File "/home/sneha/My_waveform/past work/transmit.py", line 402, in main
    tb = top_block_cls()
  File "/home/sneha/My_waveform/past work/transmit.py", line 250, in __init__
    callback=lambda ok, payload: self.digital_ofdm_demod_0.recv_pkt(ok, payload),
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/digital/ofdm.py", line 223, in __init__
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/digital/ofdm_receiver.py", line 78, in __init__
    filter.firdes.WIN_HAMMING)   # filter type
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/filter/filter_swig.py", line 143, in low_pass
    return _filter_swig.firdes_low_pass(*args, **kwargs)
RuntimeError: firdes check failed: 0 < fa <= sampling_freq / 2


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