[A51] A51 Digest, Vol 61, Issue 2

Akib Sayyed akibsayyed at gmail.com
Sat Nov 15 12:28:54 CET 2014


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On 15 Nov 2014 16:29, <a51-request at lists.srlabs.de> wrote:

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> Today's Topics:
>
>    1. airprobe-freq hopping (tom)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 14 Nov 2014 20:24:51 +0000
> From: tom <tomei9dl at gmail.com>
> To: a51 at lists.srlabs.de
> Subject: [A51] airprobe-freq hopping
> Message-ID: <54666513.7060506 at gmail.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Hi all
> Trying to get frequency hopping on gnuradio 3.7 and
> https://github.com/BogdanDIA/airprobe-hopping
> The build goes fine but when I try to run ./capture_decode I get the
> following.
>
> ./capture_decode_channelize2.sh
> min_ARFCN: 18
> max_ARFCN: 25
> Center ARFCN: 21
> Center frequency: 939200000khz
> Sampling rate: 464286
> Number of samples: 256000000
> CA files:  out/out_18.cf out/out_21.cf out/out_22.cf out/out_23.cf
> out/out_24.cf out/out_25.cf
> C0 ARFCN: 18
> C0 position: 0
> SR: 464286
> NCHANNELS: 50
> pfbDECIM: 17
> totDECIM: 112
> linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.000-18-g864f84b5
>
> -- Opening a USRP1 device...
> -- Using FPGA clock rate of 52.000000MHz...
> -- Tune Request: 939.200000 MHz
> --   The RF LO does not support the requested frequency:
> --     Requested LO Frequency: 939.200000 MHz
> --     RF LO Result: 939.250000 MHz
> --   Attempted to use the DSP to reach the requested frequency:
> --     Desired DSP Frequency: 0.050000 MHz
> --     DSP Result: 0.050000 MHz
> --   Successfully tuned to 939.200000 MHz
> --
> out/out.cf: No such file or directory
> Traceback (most recent call last):
>    File "/usr/local/bin/uhd_rx_cfile", line 215, in <module>
>      tb = rx_cfile_block(options, filename)
>    File "/usr/local/bin/uhd_rx_cfile", line 104, in __init__
>      self._sink = blocks.file_sink(gr.sizeof_gr_complex, filename)
>    File
> "/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py",
> line
> 920, in make
>      return _blocks_swig0.file_sink_make(*args, **kwargs)
> RuntimeError: can't open file
> Number of taps:      211
> Number of channels:  50
> Taps per channel:    5.0
> pfb oversampling:  2.94117647059
> Using Volk machine: sse4_a_64_orc
> ./out/out.cf: No such file or directory
> Traceback (most recent call last):
>    File "./channelize2.py", line 101, in <module>
>      main()
>    File "./channelize2.py", line 93, in main
>      tb = pfb_top_block()
>    File "./channelize2.py", line 67, in __init__
>      self.input = blocks.file_source(gr.sizeof_gr_complex,
> "./out/out.cf", False);
>    File
> "/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py",
> line
> 984, in make
>      return _blocks_swig0.file_source_make(*args, **kwargs)
> RuntimeError: can't open file
> sps:  0.428571428571
> c0pos 0
> out/out_18.cf: No such file or directory
> Traceback (most recent call last):
>    File "./gsm_receive100_channelize.py", line 147, in <module>
>      main()
>    File "./gsm_receive100_channelize.py", line 142, in main
>      gsm_receiver_first_blood().run()
>    File "./gsm_receive100_channelize.py", line 50, in __init__
>      self.sources.append(self._set_source(ifile))
>    File "./gsm_receive100_channelize.py", line 72, in _set_source
>      zrodlo = blocks.file_source(gr.sizeof_gr_complex, nazwa_pliku, False)
>    File
> "/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py",
> line
> 984, in make
>      return _blocks_swig0.file_source_make(*args, **kwargs)
> RuntimeError: can't open file
>
> I am trying this with USRP1 and my clock frequency is changed to 52mhz.
> Can someone please tell me what need to change.
> Tom
>
>
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> End of A51 Digest, Vol 61, Issue 2
> **********************************
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