Re: [Discuss-gnuradio] Transmit filtering

[John Ackermann N8UR]

On 09/05/2011 01:10 PM, Marcus D. Leech wrote:
> On 05/09/11 12:55 PM, John Ackermann N8UR wrote:
> > Hi Marcus --
> >
> > I am selecting complex taps from the drop down, but still get an error at 
> > runtime if either cutoff frequency is 0 or smaller.
> >
> > Thanks,
> >
> > John
> > ----
> I just tried it, and it works just fine.
>
> I select:  Complex->Complex (complex taps) from the menu, with a complex
> I/O, and I'm able to specify
>    negative frequency components.
>
> What is the error you're getting at runtime?

Using a band reject filter with low frequency set to -10000 and high 
frequency set to 10000, dropdown of complex(decimating), I get this:

Traceback (most recent call last):
  File "/home/jra/gnuradio/fm_rx.py", line 166, in <module>
    tb = fm_rx()
  File "/home/jra/gnuradio/fm_rx.py", line 115, in __init__
    1, 200000, -10000, 10000, 1000, firdes.WIN_HAMMING, 6.76))
  File 
"/usr/local/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_general.py", 
line 3437, in band_reject
    return _gnuradio_core_general.firdes_band_reject(*args, **kwargs)
IndexError: gr_firdes check failed: 0 < fa <= sampling_freq / 2