[Discuss-gnuradio] Re: gnu radio with a soundcard

[sriram s]

Hi,
You could try tapping the IF out of an old radio (which uses FETs) . But you 
will need  a mixer and band pass filters to bring the signal down to a range 
which your soundcard can handle.

Regards,

Ram

On Sat, Aug 30, 2008 at 11:25 PM, Mathew George <[EMAIL PROTECTED]>wrote:

>  Hi all,
>
> Can someone explain how we may build a FM/SW receiver using A/D D/A
> converter in a sound card and minimal additional hardware? Somewhere I have
> read that this is possible, in principle, but could not yet gather info
> suitable for a novice.
>
> Thanks for the help.
>
> Cheers,
> Mathew
>
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[Discuss-gnuradio] preemphasis filter in fm_emph.py

[sriram s]

Hello everyone,
I noticed the preemphasis filter in fm_emph.py is incomplete. I created one 
that seems to work fine on my system. Would anybody be interested in it? Where 
should I send the code? To [EMAIL PROTECTED] 

regards,
Sriram

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[Discuss-gnuradio] regarding gr_file_source

[sriram s]

Hello everyone,
   How can a .wav  file be converted to raw data? i 
tried using sox
sox file.wav -s -w -r 32000 file.raw
but it doesn't seem to work.
I get an error saying that the source and destination types are different.(i 
was trying to filter out a signal)
Thank you,
Sriram

   
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[Discuss-gnuradio] problem with linking libraries

[sriram s]

Hello everyone,
  I'm getting this error while importing gnuradio 
packages.

>>> from gnuradio import gr
Traceback (most recent call last):
  File "", line 1, in ?
  File "/usr/local/lib/python2.4/site-packages/gnuradio/gr/__init__.py", line 
27, in ?
from gnuradio_swig_python import *
  File 
"/usr/local/lib/python2.4/site-packages/gnuradio/gr/gnuradio_swig_python.py", 
line 23, in ?
from gnuradio_swig_py_runtime import *
  File 
"/usr/local/lib/python2.4/site-packages/gnuradio/gr/gnuradio_swig_py_runtime.py",
 line 6, in ?
import _gnuradio_swig_py_runtime
ImportError: libgnuradio-core.so.0: cannot open shared object file: No such 
file or directory
>>>

The file libgnuradio-core.so.0 is present in /usr/local/lib.  This is  the 
second time i'm installing gnuradio. During the first installation, i had not 
installed wxPython and all the examples not involving wx worked just fine. 
However after the installation of wxPython during the second installation, 
python could'nt find libpango. So i added -lpangox-1.0 to EXTRALIBS_GUI in the 
makefile and reinstalled wxPy after i came across a similar problem someone 
else had while digging through the gnuradio archives. wxPy works now.  Do you 
think this has anything to do with the problem i have now? I'm a beginner and 
don't know linux that well. Any help will be greatly appreciated. 
Thankyou in advance

Sriram

   
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[Discuss-gnuradio] problem with wxPython again

[sriram s]

Hello everyone,
can somebody please tell me whats wrong. I get this 
message whenever i try to run a script involving wxPython.

>>> import wx
Traceback (most recent call last):
  File "", line 1, in ?
  File "wx/__init__.py", line 42, in ?
  File "wx/_core.py", line 4, in ?
ImportError: /usr/local/wx2.8/lib/libwx_gtk2u_core-2.5.so.4: undefined symbol: 
pango_x_get_context

Thankyou for your patience.

Sriram



   
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[Discuss-gnuradio] problem with wx

[sriram s]

Hello everyone,
 I've installed gnuradio 3.1.1 on a system running 
slackware linux. Im new to linux and my knowledge on linux is rather limited. 
Inspite of this, I've somehow managed to install the packages correctly and 
have also successfully tested it by running the dialtone example and a few 
others. However, Im facing problems everytime i try to run a program involving 
wxPython. For example, when i run the hfx2.py, i get the following output,

Traceback (most recent call last):
  File "./hfx2.py", line 81, in ?
import os, wx, sys, math
ImportError: No module named wx

Could someone please tell me whats wrong? Any help will be greatly appreciated.

Thankyou.

   
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[Discuss-gnuradio] regarding installation of fftw

[sriram s]

hello everyone.
Im having trouble installing fftw on my comp. I have 
followed the instructions given in the guide. The last few lines of the output 
which i got was
   .
   .
   .
Makefile:329: .deps/timer.Plo: No such file or directory
Makefile:330: .deps/transpose.Plo: No such file or directory
Makefile:331: .deps/trig.Plo: No such file or directory
Makefile:332: .deps/twiddle.Plo: No such file or directory
make[2]: *** No rule to make target `.deps/twiddle.Plo'.  Stop.
make[2]: Leaving directory `/root/fftw-3.1.2/kernel'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/fftw-3.1.2'
make: *** [all] Error 2



i have Slackware linux installed.

Thankyou.


   
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[Discuss-gnuradio] RF frontend

[sriram s]

Hello everybody,
i want to build the RF frontend myself and i wanted 
to know if there is a cheaper alternative to an ADC card. If yes, should i 
provide any circuit protection? It would be really helpful if you could provide 
a circuit diagram.
Thankyou,
Sriram


   
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