Re: [Discuss-gnuradio] A small error in benchmark_tx file

[Mike Jameson]

Hi Dave,

Firstly, please sign up and post to the GNU Radio mailing list via the official method, not the Ruby forum. GNU Radio has nothing to do with Ruby!

Official GNU Radio mailing list sign-up link:

https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

In regard to your question, make sure you specify all parameters on the command line, especially frequency, lo-offset and antenna to see whether that fixes it for you.  I believe the 'none-type' error pops up because some parameter hasn't been specified and the empty parameter isn't error checked/initialised to '0' correctly if not specified on the command line.  This may be related to the following bug:

https://gnuradio.org/redmine/issues/705

Mike

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Mike Jameson M0MIK BSc MIET
Email: address@hidden
Web: http://scanoo.com

On Sun, Sep 6, 2015 at 10:08 PM, Dave Allen <address@hidden> wrote:

Hi all,
I have been trying to send data between 2 USRP's from the benchmark_tx
file only to observe that I have been receiving this error.

Traceback (most recent call last):
  File "./benchmark_tx.py", line 147, in <module>
    main()
  File "./benchmark_tx.py", line 111, in main
    tb = my_top_block(mods[options.modulation], options)
  File "./benchmark_tx.py", line 49, in __init__
    options.antenna, options.verbose)
  File
"/usr/local/share/gnuradio/examples/digital/narrowband/uhd_interface.py",
line 135, in __init__
    freq, gain, antenna)
  File
"/usr/local/share/gnuradio/examples/digital/narrowband/uhd_interface.py",
line 62, in __init__
    self._rate, self._sps = self.set_sample_rate(bitrate, sps)
  File
"/usr/local/share/gnuradio/examples/digital/narrowband/uhd_interface.py",
line 70, in set_sample_rate
    asked_samp_rate = bitrate * req_sps
TypeError: unsupported operand type(s) for *: 'float' and 'NoneType'

I am unable to understand what this error means? I have tried to search
in the Internet about this but found nothing relevant. Please advice as
to what I can do?

Thanks,
Dave

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