Re: [Discuss-gnuradio] Moon Bounce Experiment

[Joseph Craig]

On Oct 20, 2010, at 6:58 PM, Marcus D. Leech wrote:

> On 10/20/2010 08:49 PM, Joseph Craig wrote:
>> Hi Marcus,
>> 
>> Thanks for the quick reply...
>> 
>> 
>> On Oct 20, 2010, at 5:51 PM, Marcus D. Leech wrote:
>> 
>> 
>>> On 10/20/2010 07:13 PM, Joseph Craig wrote:
>>> 
>>>> I have managed to install gnuradio and run usrp_fft.py with success!
>>>> 
>>>> Now for the questions...
>>>> 
>>>> 1)  I'm always seeing...  "Exception RuntimeError: 'maximum recursion 
>>>> depth exceeded while calling a Python object' in <type 
>>>> 'exception.AttributeError'> ignored ".  What does this mean, and how to 
>>>> fix it?
>>>> 
>>>> 
>>> In what application are you seeing this error?
>>> 
>> python
>> 
>> 
> I should perhaps have clarified.  Which application, written, obviously,
> in Python, was producing this error for you?
> 
>>> 
>>>> 2)  How do I save the I/Q stream to disk?  I'm interested in the maximum 
>>>> bit resolution for the best dynamic range.  I just want the raw time 
>>>> samples.
>>>> 
>>>> 
>>> You should investigate gnuradio-companion (GRC), which allows you to put
>>> a signal processing
>>> graph together graphically--like LEGO building blocks.  You can very
>>> easily put together a
>>> "baseband recorder" application in about 5 minutes this way.
>>> 
>> 5 minutes is pretty enticing seeing how this has to be working friday.  How 
>> long does it take to setup GRC?  Is there a guide?  
>> 
>> 
> If built/installed Gnu Radio, you already have GRC/GnuRadioCompanion:
> 
> gnuradio-companion
> 
> At the prompt in a terminal window should bring up a GRC instance.
> 

nope, command not found.  I thought it was because I installed gnuradio with 
synaptic, so I installed gnuradio-companion via apt-get, still nothing.  where 
should the program files appear?  

> 
> All you should need is a  usrp-source block, and a file-sink block.

sounds like simulink.  should be easy.

Joe
> 
> The usrp-source block takes parameters like decimation,
> center-frequency, gain.
> 
> 
> 
> -- 
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
> 
>