Now i'm getting another error that i wasn't getting before...
Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
self.run()
File "./runDTVPos.py", line 333, in run
tb = collect_double_tb(f0,filename0,f1,filename1,nsamples)
File "/home/shea/Dropbox/SDP/Shea/DTVPos/Code/USRP_collection_double.py",
line 38, in __init__
channels=range(2),
File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py",
line 112, in constructor_interceptor
return old_constructor(*args)
File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py",
line 2826, in usrp_source
return _uhd_swig.usrp_source(*args)
RuntimeError: Operation not permitted
Am I not calling the constructor for the source right?
Jason Abele wrote:
>
> On Sat, Feb 25, 2012 at 3:16 PM, shea_watson <watson.s...@gmail.com>
> wrote:
>>
>> Hello,
>>
>> I'm using Ubuntu 11.10, UHD 003.004.000, the USRP N210, and the TVRX2
>> card.
>>
>> I am trying to use both the receive channels at once but I am getting a
>> strange error.
>>
>> Below is my code:
>>
>> self.Add(self.wxgui_fftsink2_0.win)
>> self.uhd_usrp_source_0 = uhd.usrp_source(
>> device_addr="",
>> stream_args=uhd.stream_args(
>> cpu_format="fc32",
>> channels=range(2),
>> ),
>> )
>>
>> self.uhd_usrp_source_0.set_samp_rate(samp_rate)
>> self.uhd_usrp_source_0.set_center_freq(509e6, 0)
>> self.uhd_usrp_source_0.set_gain(3, 0)
>> self.uhd_usrp_source_0.set_center_freq(593e6, 1)
>> self.uhd_usrp_source_0.set_gain(3, 1)
>
> My best guess is that you need to call
>
> self.uhd_usrp_source_0.set_subdev_spec('A:RXA', 0)
> self.uhd_usrp_source_0.set_subdev_spec('A:RXB', 1)
>
> before you call set_center_freq() or set_gain(). Otherwise, the
> usrp.source has no idea which tuner to address.
>
> Jason
>
>>
>>
>> However, when I run code that has this, I get this error:
>>
>> Traceback (most recent call last):
>> File "/home/shea/top_block.py", line 97, in <module>
>> tb = top_block()
>> File "/home/shea/top_block.py", line 76, in __init__
>> self.uhd_usrp_source_0.set_center_freq(509000000, 1)
>> File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py",
>> line 1846, in set_center_freq
>> return _uhd_swig.uhd_usrp_source_sptr_set_center_freq(self, *args)
>> RuntimeError: vector::_M_range_check
>>
>>
>>
>> It seems like it isnt letting me instantiate multiple channels. It
>> doesn't
>> work in Gnuradio Companion either and I get the same error message. Does
>> anyone have any ideas what could be going wrong?
>>
>> I can give any more information you need.
>>
>> Thanks!
>> SW
>> --
>> View this message in context:
>> http://old.nabble.com/Problem-using-TVRX2-on-multiple-channels-tp33392627p33392627.html
>> Sent from the GnuRadio mailing list archive at Nabble.com.
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
View this message in context:
http://old.nabble.com/Problem-using-TVRX2-on-multiple-channels-tp33392627p33392962.html
Sent from the GnuRadio mailing list archive at Nabble.com.
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
