[Discuss-gnuradio] not receiving sound of FM receiver

2011-09-25 Thread ahmad
Thanks Nino and Marcus for the answer
I also get some peaks but no sound just like you on n210 with WBX. I set the
gain to 30 and using VHF Armature antenna for 100Mhz. still no sound.
the same antenna works with any radio receiver.
 I have spent plenty of time to get something out of n210 with no success.
can you help me on this or show me a working FM example or can you give me the
right setting parameters for UHD Source  WBFM receiver blocks on GRC.I have
downloaded some UHD examples from internet but not working.
By the way, I have put the constant block after WBFM receiver not before as
Marcus suggested. 
Ahmad


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Re: [Discuss-gnuradio] not receiving sound of FM receiver

2011-09-25 Thread Antonio Cassidy
On 25 Sep 2011, at 09:40, ahmad aassbb...@gmail.com wrote:

 Thanks Nino and Marcus for the answer
 I also get some peaks but no sound just like you on n210 with WBX. I set the
 gain to 30 and using VHF Armature antenna for 100Mhz. still no sound.
 the same antenna works with any radio receiver.
 I have spent plenty of time to get something out of n210 with no success.
 can you help me on this or show me a working FM example or can you give me the
 right setting parameters for UHD Source  WBFM receiver blocks on GRC.I have
 downloaded some UHD examples from internet but not working.
 By the way, I have put the constant block after WBFM receiver not before as
 Marcus suggested.
 Ahmad

Hi Ahmad

I finally managed to pick up some FM radio stations! I found the
antenna was the issue, I followed a tutorial on building a home made
fm antenna and set the gain to 300 on the N210. When I get to my
computer I'll mail you the GRC file I'm using :0)

Nino

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Re: [Discuss-gnuradio] not receiving sound on fm receiver

2011-09-24 Thread Antonio Cassidy
On 24 Sep 2011, at 06:35, ahmad aassbb...@gmail.com wrote:

 On 20/09/11 07:15 AM, ahmad wrote:
 i ran marcus script, grc works fine. i ran many fm receivers but i received 
 only
 white noise and no signal or sound. anyone has a working example for n210 uhd?
 thanks all
 ahmad
 marcus said:
 If you run a uhd_fft.py, tuned to the correct frequency, do you receive
 a spectral plot that looks
  reasonable ?

 answer to marcus:
 yes the spectral plot is reasonable, but still have no sound.
 thanks

I spent pretty much all day yesterday trying to tune FM on an N210, I
get peaks where I'm expecting stations but just silence.

Have you tried setting the gain value higher also what antenna are you using?

Nino

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Re: [Discuss-gnuradio] not receiving sound on fm receiver

2011-09-24 Thread Marcus D. Leech
On 24/09/11 03:56 AM, Antonio Cassidy wrote:
 On 24 Sep 2011, at 06:35, ahmad aassbb...@gmail.com wrote:

 I spent pretty much all day yesterday trying to tune FM on an N210, I
 get peaks where I'm expecting stations but just silence.

 Have you tried setting the gain value higher also what antenna are you using?

 Nino


   
Probably a signal magnitude issue then.  Don't forget that UHD scales
everything into
  {-1.0,1.0}.  If you've adapted some of the classic examples to UHD,
you may need to
  put a multiplier block right after the UHD source.


-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org



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[Discuss-gnuradio] not receiving sound on fm receiver

2011-09-23 Thread ahmad
On 20/09/11 07:15 AM, ahmad wrote:
i ran marcus script, grc works fine. i ran many fm receivers but i received only
white noise and no signal or sound. anyone has a working example for n210 uhd?
thanks all
ahmad
marcus said:
If you run a uhd_fft.py, tuned to the correct frequency, do you receive
a spectral plot that looks
  reasonable ? 

answer to marcus:
yes the spectral plot is reasonable, but still have no sound.
thanks


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