Try leaving the field blank to get the previous behavior.
On Wed, May 26, 2021 at 10:02 AM Jason Matusiak <
[email protected]> wrote:
> It has been a while since I have worked with GNUradio, but I am poking
> around with it again and having some issues. I am currently using v3.8 on
> an Ubuntu machine.
>
> I was trying to get a custom flowgraph to work and ran up against an error
> for the rational resampler. I then pulled out the fm_rds_alternate.grc
> example from gr-rds and found the exact same issue. Basically, if I use
> the stock flowgraph, when I try to run it, I get the following error:
>
> Traceback (most recent call last):
> File "/opt/gnuradio/v3.8/src/gr-rds/examples/fm_rds_alternate.py", line
> 784, in <module>
> main()
> File "/opt/gnuradio/v3.8/src/gr-rds/examples/fm_rds_alternate.py", line
> 760, in main
> tb = top_block_cls()
> File "/opt/gnuradio/v3.8/src/gr-rds/examples/fm_rds_alternate.py", line
> 548, in __init__
> fractional_bw=0)
> File
> "/opt/gnuradio/v3.8/lib/python3/dist-packages/gnuradio/filter/rational_resampler.py",
> line 150, in __init__
> interpolation, decimation, taps, fractional_bw)
> File
> "/opt/gnuradio/v3.8/lib/python3/dist-packages/gnuradio/filter/rational_resampler.py",
> line 113, in __init__
> taps = design_filter(interpolation, decimation, fractional_bw)
> File
> "/opt/gnuradio/v3.8/lib/python3/dist-packages/gnuradio/filter/rational_resampler.py",
> line 46, in design_filter
> raise ValueError("Invalid fractional_bandwidth, must be in (0, 0.5)")
> ValueError: Invalid fractional_bandwidth, must be in (0, 0.5)
>
> >>> Done (return code 1)
>
> Did something maybe change with the rational resampler and I need to
> update older flowgraphs? Using a value of 0.4 allows it to run, but I am
> not sure if that is an acceptable value when it was previously set to zero
> (it would appear).
>
>
