Re: [Discuss-gnuradio] Using WBFM block

[Marcus Müller]

Given your question, I think you already know the answer. 2MHz is far from audio. Please refer to the wbfm example in GNU Radio, which has sane parameters.

Greetings,
Marcus

On 05.06.2014 09:58, jason sam wrote:

Hi All,
I am doing simple wide band FM..The flowgraph is as attached..When i
execute it i am getting following error:

gr_remez: insufficient extremals -- cannot continue
Traceback (most recent call last):
  File "/home/ali/Desktop/top_block.py", line 109, in <module>
    tb = top_block()
  File "/home/ali/Desktop/top_block.py", line 75, in __init__
    max_dev=4000000,
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/analog/wfm_tx.py",
line 69, in __init__
    40)              # stopband atten dB
  File "/usr/local/lib/python2.7/dist-packages/gnuradio/filter/optfir.py",
line 55, in low_pass
    taps = filter.pm_remez (n + nextra_taps, fo, ao, w, "bandpass")
  File
"/usr/local/lib/python2.7/dist-packages/gnuradio/filter/filter_swig.py",
line 466, in pm_remez
    return _filter_swig.pm_remez(*args, **kwargs)
RuntimeError: gr_remez: insufficient extremals -- cannot continue

Is the quadrature rate and audio rate are high?

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