run gqrx on ubuntu 15.10 with SDR-DXPATROL

[Chevalier Laurent]

Hi,
I would like to run
gqrx (2.2.0.74.d97bd7-2)
on my
laptop : dell latitude 6200
with my distribution
linux: ubuntu 14.04

The problem seems link to the missing
mount /dev/ttyUSB0

Do you know, how should I proceed to run properly gqrx?
Thanks in advance
laurent
ps: output text in the following
and 2 screen captures get after running gqrx

~$ gqrx
linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.005.005-0-unknown

gr-osmosdr 0.1.1 (0.1.1) gnuradio 3.7.2.1
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf rfspace
Using Volk machine: avx_64_mmx_orc
gr-osmosdr 0.1.1 (0.1.1) gnuradio 3.7.2.1
built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf rfspace

FATAL: Unknown host (/dev/ttyUSB0)

Trying to fill up 1 missing channel(s) with null source(s).
This is being done to prevent the application from crashing
due to gnuradio bug #528.

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::math::rounding_error> >'
  what():  Error in function boost::math::round<f>(f): Value -inf can not be represented in the target integer type.
Aborted (core dumped)

[Alexandru Csete]

On Tue, Dec 8, 2015 at 3:51 PM, Chevalier Laurent
<laurent.pasc...@gmail.com> wrote:
> Hi,
> I would like to run
> gqrx (2.2.0.74.d97bd7-2)
> on my
> laptop : dell latitude 6200
> with my distribution
> linux: ubuntu 14.04

Hi Laurent,

The subject of your mail says Ubuntu 15.10, so which version are you running?

>
> The problem seems link to the missing
> mount /dev/ttyUSB0

According to the screenshot, you have selected RFSPACE SDR-IQ as input
device, so gqrx will naturally look for this radio connected to a USB
port.

> Do you know, how should I proceed to run properly gqrx?

You should select whatever device "SDR-DXPATROL" corresponds to - what
is it? Is it an rtlsdr device?

I would also like to remark that gqrx 2.2 is very old and has many
bugs that have been fixed since then.

Alex

[Laurent Chevalier]

Alex,
1/ Thanks for the quick answer

2/ ubuntu: 15.10,15.04,14.04
exactly same troubles

3/ SDR: rtlsdr device:
I will say: yep
http://www.rtl-sdr.com/roundup-software-defined-radios/
http://www.ct1ffu.com/site/?option=com_content&view=article&id=178&Itemid=104
but I am new comer...

4/ old gqrx 2.2:
but compatible with ubuntu 15.10:
which version should used:gqrx 3.0 ?

laurent

[Alexandru Csete]

Hi Laurent,

According to this page:
http://packages.ubuntu.com/wily/gqrx-sdr

you should be able to get gqrx 2.3.1 on Ubuntu 15.10, no?

Yes, you get the same wrong behaviour because you are using the wrong
device. RFSPACE SDR-IQ is a completely different radio:
http://www.rfspace.com/RFSPACE/SDR-IQ.html

For rtlsdr you have to select a device with RTL2832U in the name. Or
something similar.

So try that. If it's not working try running it from the command line
and see what error messages you get. You may have to disable the TV
driver in the kernel.

Alex

[Laurent Chevalier]

Alex,
thanks!
I am trying your advices and back to you if problem
laurent

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Laurent Chevalier (Saclay-CEA) | tel : +33 1 69 08 37 28
CE-Saclay F-91191 Gif/Yvette | mail:lau...@hep.saclay.cea.fr
http://cern.ch/laurent.chevalier | :laurent....@cern.ch

[Laurent Chevalier]

Alex,
1/ works! see attachment: THANKS!

2/ gqrx runs on ubuntu 14.04 and see my SDR-DX-patrol
but no signal (as fm radio) seems recorded by the SDR
see again the same attachment.


3/ any idea?

Thanks in advance
laurent

[AndreaVi]

Try to raise the gain settings (they are in "input controls" tab).

You have set lnb_lo to 10 mhz. You'll need to set lnb_lo to -40mhz when using the hf band up-converter of the dx-patrol (I think there is a switch to select the band), otherwise leave it to 0. 

Good luck.

[Laurent Chevalier]

Hello Alex and Andrea
Thanks for your advices
it works! see attachment