Running but nothing on FFT display

Jose Perez Junior joseperezjunior at gmail.com
Tue Jul 21 15:32:53 UTC 2015


Hi,

I have one RTL-SDR and in my home computer it is working well. Now I am
tryint to run in my office.
Here is Ubuntu 14.04 and GNU Radio 3.7.8... For a simple flowgraph just
with RTL-SDR Source and a FFT Sink I can't vizualise nothing in FM (88 -
108 MHz). I have also here a USRP and a BlackRF and both oof then are
working well. Is there something to solve this?

This is the output of Terminal to rtl_test -t

Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6
19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9
44.5 48.0 49.6
Sampling at 2048000 S/s.
No E4000 tuner found, aborting.



And this is the output of GNU Radio.
[image: Imagem inline 1]




Thanks so much,
-- 
.: José Perez Jr
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