[Discuss-gnuradio] A small error in benchmark_tx file

[Dave Allen]

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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