[Discuss-gnuradio] gr_remez insufficient extremals

[Bernardo Guadagnin Gonçalves]

Hello,

Until last week I was using the Gnu Radio 3.2.2 (which is ready for use in ubuntu), then I decided to try the latest version (v3.3.1git-147-g5a23954a). The flowgraph was working perfectly. It's for "in" GRC simulation only. I know it's very simple and the 38kHz recovery (at the receiver) is not the recommended way.

Flowgraph: http://dl.dropbox.com/u/8898915/FMstereotxrx2.grc

.Wav for simulation: http://dl.dropbox.com/u/8898915/sine4k.wav

The messages that are now shown are:

Showing: "/home/mula/Dropbox/Public/FMstereotxrx2.grc"

Generating: "/home/mula/Dropbox/Public/top_block.py"

Executing: "/home/mula/Dropbox/Public/top_block.py"

gr_remez: insufficient extremals -- cannot continue

Traceback (most recent call last):

  File "/home/mula/Dropbox/Public/top_block.py", line 361, in <module>

    tb = top_block()

  File "/home/mula/Dropbox/Public/top_block.py", line 193, in __init__

    tau=tau,

  File "/usr/local/lib/python2.6/dist-packages/gnuradio/blks2impl/fm_demod.py", line 65, in __init__

    60)   # Stopband attenuation

  File "/usr/local/lib/python2.6/dist-packages/gnuradio/optfir.py", line 53, in low_pass

    taps = gr.remez (n + nextra_taps, fo, ao, w, "bandpass")

  File "/usr/local/lib/python2.6/dist-packages/gnuradio/gr/gnuradio_swig_py_general.py", line 432, in remez

    return _gnuradio_swig_py_general.remez(*args, **kwargs)

RuntimeError: gr_remez: insufficient extremals -- cannot continue

>>> Done

Thanks!

Regards,
Bernardo