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Re: [Discuss-gnuradio] MIMO setup error in GRC

From: Josh Blum
Subject: Re: [Discuss-gnuradio] MIMO setup error in GRC
Date: Mon, 29 Oct 2012 11:34:46 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121011 Thunderbird/16.0.1

On 10/28/2012 03:00 PM, Alex Dusowitz wrote:
> Hi,
> Does anyone know about the following error?
> File "/export/home/usrp2/gnuradio-3.6.0/MyGRC/top_block.py", line 52, in
> __init__
>     self.uhd_usrp_source_0.set_clock_source("mimo", 1)
>   File "/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py",
> line 1915, in set_clock_source
>     return _uhd_swig.uhd_usrp_source_sptr_set_clock_source(self, *args,
> **kwargs)
> RuntimeError: vector::_M_range_check

So thats a vector index of of range error:
self.uhd_usrp_source_0.set_clock_source("mimo", 1)

Perhaps the device is not configured for two motherboards? What was your
device address? You may find an example for this in the GRC properties
dialog. Something like:



> I am trying to setup a simple MIMO reception with N210+WBX boards in GRC.
> My MIMO connection is all ok since I can see both devices attached by
> running "uhd_find_devices" and "uhd_usrp_probe". My GRC has a [uhd: usrp
> source] block configured to have 2 Mboards one having default time and
> clock and the other having MIMO as its reference. Basically I have
> configured it the same as the model in Ettus's Application Note on MIMO and
> synchronization. But I'll get the error above at run-time.
> Any help is very much appreciated!
> Thanks,
> Alex
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