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Re: [Discuss-gnuradio] GPS on USRP
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] GPS on USRP |
Date: |
Wed, 5 Mar 2008 12:50:19 -0800 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Wed, Mar 05, 2008 at 03:15:16PM -0500, Paul Creekmore wrote:
> It would be helpful to know exactly what you mean by "this isn't
> happening." What /does/ happen? Anything? Do you get a data file? Have
> you tried recording and plotting a simple test sinewave?
>
> You could also very easily convert the data in MATLAB.
>
> --Paul
>
> Phaysal Khan wrote:
>> Hi,
>> I used usrp_fft, and I can see a CW at 1575.42MHz, so it means that it is
>> in the working condition, although I still get the same error msg once
>> everytime i run anything. It says
>>
>> $python usrp_fft.py -f 1.57542G
>> usb_contro_msg failed: usb_control_msg: sending control message failed,
>> win error: A device attached to the system is not functioning.
>> But as I said, that I can see the generated CW on the usrp_fft graph, and
>> the CW displayed on this graph follows the changes in frequency and
>> amplitude made from signal generator, then I think we can ignore this
>> error msg. We should be ready to move forward.
>> I am trying to use usrp_rx_cfile.py which I have altered as:
>> u = usrp.source_c (0, options.decim, 1, gru.hexint(options.mux), 0)
>> u.set_rx_freq (0, options.ddc_freq)
>> u.set_pga (0, options.gain)
>> u.set_pga (1, options.gain)
>> c2r=gr.complex_to_real()
>> dst = gr.file_sink (gr.sizeof_float, options.output_file)
>> #fg.connect (u, dst)
>> fg.connect(u,c2r,dst)
>> also, I am saving data to file as:
Phaysal,
If you are using only u.set_rx_freq, your modifications have removed
the ability to set the LO on the daughterboard.
Eric
- Re: [Discuss-gnuradio] GPS on USRP, Firas A., 2008/03/01
- RE: [Discuss-gnuradio] GPS on USRP, Phaysal Khan, 2008/03/01
- Re: [Discuss-gnuradio] GPS on USRP, Paul Creekmore, 2008/03/03
- RE: [Discuss-gnuradio] GPS on USRP, Phaysal Khan, 2008/03/03
- Re: [Discuss-gnuradio] GPS on USRP, Paul Creekmore, 2008/03/04
- Re: [Discuss-gnuradio] GPS on USRP, Johnathan Corgan, 2008/03/04
- RE: [Discuss-gnuradio] GPS on USRP, Phaysal Khan, 2008/03/04
- Re: [Discuss-gnuradio] GPS on USRP, Don Ward, 2008/03/04
- Re: [Discuss-gnuradio] GPS on USRP, Paul Creekmore, 2008/03/05
- Re: [Discuss-gnuradio] GPS on USRP,
Eric Blossom <=
- RE: [Discuss-gnuradio] GPS on USRP, Phaysal Khan, 2008/03/05
- RE: [Discuss-gnuradio] GPS on USRP, Phaysal Khan, 2008/03/04