Re: [Discuss-gnuradio] New help

[DJCarlson]

Thanks for the help -

With just TVRX installed - and a radioshack FM antenna that I use on my
stereo, running:

usrp_fft.py -f 107.9M -d 16

I get a weak peak at 0.0 and another weak peak at -1.25 (maybe WMJX 106.7?)
- that is it

Does not say "failed to set frequecy - the 107.9 is if freq box -

power down and install basic RX board  with same command - I get a peak at
0.0 (noise between -30 and -20 dB - Signal peak @ -8dB

Running usrp_wfm_rcv.py -f 107.9 with either board produces same results
discribed earilier - 

Thoughts?

Thanks -

Doug

Eric Blossom wrote:
> 
> On Tue, Aug 22, 2006 at 10:40:23AM -0700, DJCarlson wrote:
>> 
>> Hi -
>> 
>> Sorry - hadn't finished subscribing!
>> 
>> I'm new to GNU Radio - warning -  it has been many years since I've done
>> much programing.  Anyway, I managed to get FC5 running on my Compact PC,
>> downloaded gnu radio code via svn - most seemed to make.  I ran
>> dial_tone.py
>> and had a dial tone coming out of the speaker - victory!  So, I ordered
>> usrp
>> and some various Rx/Tx boards.
> 
> Welcome!
> 
>> With TVRx install and antenna attached, running usrp_wfm_rcv.py -f 107.9
>> (from gnurdio-examples - WXKS in Boston - a strong station) I get a very
>> weak, if any peak at 107.9 - and nothing from speakers - am I doing
>> something dumb?  Oh - when I plug power in - I get the fast blinking LED
>> -
>> when program runs - changes to slow blink - 
> 
> Does is say anything about "failed to set frequency"?
> 
> Do you have more than one Rx daughterboard installed, or just the TV_RX?
> 
> Try this:
> 
>   $ usrp_fft.py -f 107.9M -d 16
> 
> This should show you 4 MHz of spectrum centered on 107.9 MHz.
> There should be a bunch of stations visible.
> 
> Try adjusting the gain, too.
> 
> What kind of antenna are you using?  I've had good luck with an
> el-cheapo "FM dipole" from my local drug store, radio shack, etc.
> 
> Eric
> 
> 
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> 
> 

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