Receiving Signals

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2011EE10487
Posts: 18
Joined: Tue Feb 25, 2014 6:39 am

Receiving Signals

Post by 2011EE10487 » Tue May 06, 2014 2:03 am

Hey,
I've been working on BladeRF and I'm able to generate signals from it using gnuradio flowgraph (osmocom sink). But I'm not been able to receive signals using osmocom source. The osmocom_fft example was not working either. Can anyone help me with this. I just had a wild idea that would there be need of using external power (adapter) to receive signals properly.

Thanks

bpadalino
Posts: 303
Joined: Mon Mar 04, 2013 4:53 pm

Re: Receiving Signals

Post by bpadalino » Tue May 06, 2014 4:46 am

Can you be a little more specific on what is not happening?

Is you run with osmocom_fft, what do you see? Do you see anything? Are there errors on the console?

Brian

2011EE10487
Posts: 18
Joined: Tue Feb 25, 2014 6:39 am

Re: Receiving Signals

Post by 2011EE10487 » Tue May 06, 2014 10:06 pm

No I didn't got any errors. The output I'm getting is in this video. https://docs.google.com/file/d/0B5ZnEve ... t0dGM/edit. I am trying to receive a sine signal transferred from my USRP. The other way i.e., transmitting it from BladeRf and receiving it from USRP works fine.
When I run osmocom_fft in XY mode the output is like this. https://docs.google.com/file/d/0B5ZnEve ... ZiTFU/edit.

Thanks

jynik
Posts: 455
Joined: Thu Jun 06, 2013 8:15 pm

Re: Receiving Signals

Post by jynik » Fri May 09, 2014 6:57 pm

On the bladeRF receive side, could you try bringing that VGA1 gain down -- 33 dB is quite a lot. I too, have seen some instability when the gains are set way too high -- I believe this is currently being investigated. Try just a few dB, rather than 33.

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