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greatscottgadgets
[Technical Support]: Can't get FM stations to show on FFT plot, only single tone
Can't get FM stations to show on FFT plot, only single tone
Hi,
HackRF newbie here. I am trying to run some basic code here, receive FM station. When I used a Soapy HackRF source and a QT GUI Frequency Sink, I only see one tone at the frequency that i specify for the HackRF. Nothing else around it. The lights on the side of the HackRF are on and RX is lit.
I am running Ubuntu, and when I run the hackrf_info command legit looking data shows up. All packages are updated.
I have updated the firmware to: 2021.03.1
What am I doing wrong?
Please review the GNU Radio tutorials: https://wiki.gnuradio.org/index.php/Tutorials
Please review the GNU Radio tutorials: https://wiki.gnuradio.org/index.php/Tutorials
Will do, in the meantime is there an obvious gotcha here? Thanks!
You are hearing a tone so that seems fine. What are you hoping to have happen?
See fm radio stations around the spectrum, a tone comes up where I set the center frequency but no where else.
On Wed, Sep 14, 2022 at 3:24 PM Straithe @.***> wrote:
You are hearing a tone so that seems fine. What are you hoping to have happen?
— Reply to this email directly, view it on GitHub https://github.com/greatscottgadgets/hackrf/issues/1158#issuecomment-1247206205, or unsubscribe https://github.com/notifications/unsubscribe-auth/AEBZVFLZ2WM4PX2OVUBIOTDV6IQ73ANCNFSM6AAAAAAQMWKLMI . You are receiving this because you authored the thread.Message ID: @.***>
The spike/tone is the DC offset.
You may need to turn up some gains in the source block. I assume you have a suitable antenna connected?
The spike/tone is the DC offset.
You may need to turn up some gains in the source block. I assume you have a suitable antenna connected?
The antenna that came with it. I also saw that in the FAQ. I updated firmware. Not sure if this could be a version mismatch and how to tell?
The spike/tone is the DC offset.
You may need to turn up some gains in the source block. I assume you have a suitable antenna connected?
Also changing gains didn't help.
@jadams454
For what it's worth, I've replicated the simple flow graph (on Windows) and it works as expected:
It could be that there's something off with the Soapy -> HackRF layer on your Ubuntu install. This might help: https://wiki.gnuradio.org/index.php/Soapy#Debugging .What I would recommend is installing the gr-osmocom (apt-get install gr-osmosdr) blocks and see if the problem persists. That will at least narrow it down:
EDIT: It appears the soapy sources are filtering down to just 2 MB of bandwidth centered in the middle. I would not use Soapy with HackRF in GnuRadio. There may be a way to override this, but I don't know enough about how Soapy works.
@jadams454 are you still looking for assistance or may I close this issue?
All set thanks
On Tue, Nov 22, 2022 at 5:39 PM Straithe @.***> wrote:
@jadams454 https://github.com/jadams454 are you still looking for assistance or may I close this issue?
— Reply to this email directly, view it on GitHub https://github.com/greatscottgadgets/hackrf/issues/1158#issuecomment-1324330130, or unsubscribe https://github.com/notifications/unsubscribe-auth/AEBZVFNADVXFA3VTBU5SMJLWJVDQLANCNFSM6AAAAAAQMWKLMI . You are receiving this because you were mentioned.Message ID: @.***>