8000 No sound just a tone on pluto · Issue #2 · pabr/leantrx · GitHub
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No sound just a tone on pluto #2

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ghost opened this issue Dec 12, 2019 · 6 comments
Open

No sound just a tone on pluto #2

ghost opened this issue Dec 12, 2019 · 6 comments

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@ghost
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ghost commented Dec 12, 2019

Hi

I am running plutosdr on linux with web interface and I here a constant tone. There is no sound for FM radio or any channel.

Thanks
@pabr
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pabr commented Dec 13, 2019

The tone is emitter when there is nothing else to send. It shows that audio streaming is working. It should disappear when you enable one or more channel by ticking their boxes in the web UI.

@ghost
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ghost commented Dec 13, 2019 via email

@unixpunk
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@khan2018 do you have this running directly ON the pluto? If so, I found that there isn't enough CPU power to handle the samplerate that's used in some of these preset leansdr screens. You may need to tweak things to use a lower sample rate to view less of the spectrum at once. Hope that helps.

@pabr
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pabr commented Dec 13, 2019

@khan2018 My mistake, IIRC the tone is generated in the browser when the demodulator is not streaming, so it probably indicates that the software is not fully installed and running. leantrx must run directly on the PlutoSDR if you intend to demodulate more that a couple MHz, due to USB bandwidth limitations. Then in theory you can access the web UI from any modern browser (but I only test with firefox and chrome). Are you using a USB OTG cable, USB hub, USB-ethernet adapter and USB flash drive ? If the PlutoSDR fails to autorun the flash drive, you can try to login over ssh and execute start.sh manually.

@unixpunk Yes, for some presets you need to unlock the second CPU core (google "plutosdr setenv maxcpus") and it might still be tight depending on firmware version, network load, etc. I haven't tested this software in a while.

@ghost
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ghost commented Dec 16, 2019

I have a usb hub and usb-ethernet adapter separate. I tried to connect using them both but did not work on windows.
On linux it was just pluto directly attached.
I am trying to run on android but again same problem pluto does not boot from the flash drive. I just put the files you mentioned on the flash. Is there any step I am missing.
Also how do you run the RFAnalyzer with pluto?
Thanks,

@pabr
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pabr commented Dec 16, 2019

It looks like your best option is to connect the Pluto directly to a linux linux PC. Please follow the procedure at http://www.pabr.org/radio/leantrx/leantrx.en.html#plutosdr_usbdev_install and copy-paste the output of start.sh here.

AFAIK RFAnalyzer only supports rtl-sdr hardware, not Pluto.

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