This partially fixed the problem, in the sense that samples are now
displayed on the fft window when running usrp2_fft.py, and it no longer
says "channel 0 not receiving". However, it still fails to set the
frequency of the receiver. Also, when I run usrp_siggen.py, I still get
the same problem that the Tx frequency can't be set. In verbose mode,
the output of usrp_siggen.py is as below. Any ideas on what else could
be wrong?
Regards
Ian.
USRP interpolation rate: 16
USRP IF bandwidth: 6.25MHz
Set TX gain to: 15.0
Using auto-calculated mid-point frequency
Failed to set freq.
(...etc...)
>Your firmware and fpga images on the sd card are probably out of sync.
>You can find images here: http://gnuradio.org/releases/usrp2-bin/trunk/
>and here are instructions on how to burn:
>http://gnuradio.org/redmine/wiki/gnuradio/USRP2UserFAQ
>-Josh
On 01/28/2010 06:14 PM, Ian Holland wrote:
> Hi Matt
>
> I have tried usrp2_fft.py -f 2.4G and also usrp2_fft.py -f 5.7G as you
> suggest below. In both cases, the fft window opens but no trace is
> displayed, and I see the following output in the terminal:
>
> usrp2: channel 0 not receiving
> usrp2::rx_sample() failed
>
> I only recently received my USRP2s and XCVR2450s, which were shipped
at
> the end of December. Are there any known issues with the firmware on
the
> SD cards at this time, or do you have any other idea why I can't seem
to
> tune frequencies on these cards?
>
> Thanks
>
> Ian.
>
> -----Original Message-----
> From: Matt Ettus [mailto:matt@ettus.com]
> Sent: Friday, 29 January 2010 12:35 PM
> To: Manav Seth
> Cc: Ian Holland; discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] Unable to tune Tx or Rx with XCVR2450
on
> USRP2
>
>
>
> The -f argument to usrp2_fft.py is the frequency. By putting "-f
1000"
> you are telling the system to try to tune the xcvr2450 to 1 kHz. The
> specified range is 2.4-2.5 GHz and 4.9 to 5.9 GHz. 1 kHz is WAY
outside
>
> of that range. I would suggest you try something like:
>
> usrp2_fft.py -f 5.7G
>
> Matt
>
> On 01/28/2010 05:35 PM, Manav Seth wrote:
>> Actually no...its always returning false...
>> when I use usrp2_fft.py with -f 1000 then output does come but still
> it
>> is unable to set the initial frequency though it did receive.
>>
>> I am still trying to figure out the problem...
>>
>> On Thu, Jan 28, 2010 at 3:43 PM, Ian Holland
>> <Ian.Holland@rlmgroup.com.au<mailto:Ian.Holland@rlmgroup.com.au>>
> wrote:
>>
>> On Wed, Jan 27, 2010 at 8:52 PM, Ian Holland
>>
<Ian.Holland@rlmgroup.com.au<mailto:Ian.Holland@rlmgroup.com.au>>
>> wrote:
>> Hi All
>>
>> I have been trying to set the Tx and Rx frequencies when using
an
>> XCVR2450 with a USRP2, but it seems these keep failing. A
snippet
> of my
>> source code is below for setting the Tx frequency.
>> The output of this portion of code is "Failed to tune Tx", and
the
>> frequencies are all 0, with spectrum_inverted being false.
>> I have also tried to use usrp2_fft.py, and this fails saying
> nothing is
>> received on channel 0.
>> Does anyone know what the problem could be?
>>
>> Thanks
>>
>> Ian.
>>
>> /* try tuning Tx to a test frequency */
>> double Fc = 2400000000.0;
>> usrp2::tune_result TxTuneResult;
>> bool successTx = device->set_tx_center_freq(Fc,
>> &TxTuneResult);
>> if(successTx) {
>> cout<< "Tx Tune
Successful:\n";
>> cout<< " Baseband Frequency: "<<
>> TxTuneResult.baseband_freq<< "\n";
>> cout<< " DxC Frequency: "<<
>> TxTuneResult.dxc_freq<< "\n";
>> cout<< " Residual Frequency: "<<
>> TxTuneResult.residual_freq<< "\n";
>> cout<< " Spectrum Inverted: "<<
>> (TxTuneResult.spectrum_inverted ? "true" : "false")<< "\n";
>> }
>> else {
>> cout<< "Failed to tune Tx.\n";
>> cout<< " Baseband Frequency: "<<
>> TxTuneResult.baseband_freq<< "\n";
>> cout<< " DxC Frequency: "<<
>> TxTuneResult.dxc_freq<< "\n";
>> cout<< " Residual Frequency: "<<
>> TxTuneResult.residual_freq<< "\n";
>> cout<< " Spectrum Inverted: "<<
>> (TxTuneResult.spectrum_inverted ? "true" : "false")<< "\n";
>> }
>> cout<< "\n";
>>
>> _______________________________________________
>>
>> >From: Manav Seth [mailto:smartymanav@gmail.com
>> <mailto:smartymanav@gmail.com>]
>> >Sent: Thursday, 28 January 2010 3:29 PM
>> >To: Ian Holland
>> >Cc: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org>
>> >Subject: Re: [Discuss-gnuradio] Unable to tune Tx or Rx with
> XCVR2450
>> on>USRP2
>>
>> >Ya, its failing for me too...set_tx_center_freq is always
> failing
>> (though I>am writing my code in python)..
>> >not able to find the cause...
>>
>> Have you been able to get any of the pre-written scripts (e.g.
>> usrp2_fft.py or usrp_siggen.py) working? I can't even get those
to
> work.
>> I tried usrp_siggen.py in verbose this morning and noticed again
> it was
>> unable to set the Tx frequency. Also, I think the error I had
> mentioned
>> above re usrp2_fft.py would be because the rx frequency couldn't
> be set.
>>
>> I have tried two of the daughtercards on one USRP2, and one of
> those two
>> cards on the other USRP2, and still can't get it to set, though
it
>> worked fine using the same code for the BasicTx and BasicRx.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org
>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
> _______________________________________________
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