Tetra decoding

[sq5bpf]

[...]
Kernel driver is active, or device is claimed by second instance of librtlsdr.
In the first case, please either detach or blacklist the kernel module
(dvb_usb_rtl28xxu), or enable automatic detaching at compile time.

usb_claim_interface error -6
Failed to open rtlsdr device #0.

Any ideas?

its all there:
the dvb_usb_rtl28xxu kernel driver is active (this is the driver used for watching TV), because ubuntu autoloaded it (probably udevd did)

blacklist it (add: blacklist dvb_usb_rtl28xxu to /etc/modprobe.conf and reboot), or enable some compile-time option (you would need to recompile the odmosdr drivers and probably have root, i wouldn't bother with this and use blacklisting).

you will probably find some better ubuntu-specific advice on the internet

 

[sammy3418]

its all there:
the dvb_usb_rtl28xxu kernel driver is active (this is the driver used for watching TV), because ubuntu autoloaded it (probably udevd did)

blacklist it (add: blacklist dvb_usb_rtl28xxu to /etc/modprobe.conf and reboot), or enable some compile-time option (you would need to recompile the odmosdr drivers and probably have root, i wouldn't bother with this and use blacklisting).

you will probably find some better ubuntu-specific advice on the internet

Thanks fro your fast response really appreciate it thank you

 

[apcofan]

Hi!

I have a problem with telive installation. When I type ./install.sh i get following error:
cannot create following folders:
/tetra/in
/tetra/out
/tetra/log
/tetra/tmp
/tetra/bin
System says that they exist! but when I go into telive/tetra, folder is empty. Any ideas what can be wrong?

 

[hansheesbeen]

Did you tried: sh ./install.sh

 

[apcofan]

It doesn`t help Still same problem. All software works but doesn`t decode anything and it doesn`t matter that I have strong tetra signal, it simply doesn`t work I am setting my decoder on x86 Ubuntu 10.04.

 

[sq5bpf]

Hi!

I have a problem with telive installation. When I type ./install.sh i get following error:
cannot create following folders:
/tetra/in
/tetra/out
/tetra/log
/tetra/tmp
/tetra/bin
System says that they exist! but when I go into telive/tetra, folder is empty. Any ideas what can be wrong?

you probably ran ./install.sh twice. also telive/tetra is a different directory that /tetra.

my advice - get someone who has a basic understanding of linux/unix, shell scripts etc and he will help you setup this software very quickly

 

[apcofan]

I mean that folders cannot be created in telive/tetra/... I don`t know anyone who could help me with installation, that`s why I am asking here..

 

[hansheesbeen]

do cd /tetra is it there?

 

[apcofan]

No it`s not! But installers says it is! I can create these folders manually but it doesn`t change anything...

 

[sq5bpf]

It doesn`t help Still same problem. All software works but doesn`t decode anything and it doesn`t matter that I have strong tetra signal, it simply doesn`t work I am setting my decoder on x86 Ubuntu 10.04.

do you have the latest version from git? (and not one from a few days ago)

are you sure this is a tetra signal? (and not tetrapol, which ich something completely different)

are there any errors in gnuradio-companion? (maybe you're not entering the frequency correctly in the gnuradio-companion receiver, like you entered 390MHz or 390, instead of 390M etc)

does the spectrum look symmetrical to 0Hz? (if not fix ppm and/or use fine tune)

does receiver1 receive anything? (redirect output to file and show it)

does telive log anything? (enable logging and alldump, see whats in the telive.log file, show it)

also have someone more familiar with linux look at the system side of things (just show him the scripts and the install procedure)

 

[apcofan]

After system restart it`s now working! Thanks for Your interest!

 

[yo4tnv]

Have any of you managed to pull out voice from unencrypted channel ?

 

[hansheesbeen]

Yes i have sound a lot better than dsd.

 

[apcofan]

Me too, I can hear audio transmissions in very good quality!

 

[signal4567]

Im using this with Ubuntu 14.04.1 32bit as a VM and physical machine.
Works good, but im getting stuttering in voice calls at the beginning of the call, this happens in both machines.
When i record, i can playback those sometimes without stuttering (like the audio disappears) if i try several times.
Is this something you know about sq5bpf?

 

[sq5bpf]

it uses the reference codec from etsi, so it should be as good as a tetra radio.

there is a slight bug, which i won't fix right now, that there is a slight hiccup at the end of audio. this is only present in the live audio, and not in the recordings.

btw a new version of osmocom-tetra-sq5bpf is just out that should fix crashes with certain types of sds. please update, especially if you get random crashes.

 

[sammy3418]

Gutted I've been at this most of the day.. I just get fatal error popup on the gruradio when I hit the cog to start... The graph comes up but no sound and nothing working...Anyone running this on VMware? This maybe my problem! Or should I try I different flavour of Linux?

This is what I get when I start gruradio

<<< Welcome to GNU Radio Companion 3.6.5.1 >>>

Loading: "/home/sam/Desktop/telive_1ch.grc"
>>> Done

Showing: "/home/sam/Desktop/telive_1ch.grc"

Generating: "/home/sam/Desktop/top_block.py"

Executing: "/home/sam/Desktop/top_block.py"

linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.000-48-g241c6903

Using Volk machine: avx_32_mmx_orc
gr-osmosdr v0.0.2-76-gc7cb045f (0.0.3git) gnuradio 3.6.5.1
built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace
Using device #0 Realtek RTL2838UHIDIR SN: 00000013
usb_claim_interface error -6

FATAL: Failed to open rtlsdr device.

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

>>> gr_fir_ccf: using SSE

 

[sammy3418]

it uses the reference codec from etsi, so it should be as good as a tetra radio.

there is a slight bug, which i won't fix right now, that there is a slight hiccup at the end of audio. this is only present in the live audio, and not in the recordings.

btw a new version of osmocom-tetra-sq5bpf is just out that should fix crashes with certain types of sds. please update, especially if you get random crashes.

newbie here buddy....how you update to the new version ?

 

[sq5bpf]

Gutted I've been at this most of the day.. I just get fatal error popup on the gruradio when I hit the cog to start... The graph comes up but no sound and nothing working...Anyone running this on VMware? This maybe my problem! Or should I try I different flavour of Linux?

did you read the avaliable documentation first? in the tutorial on rtl-sdr.com they are using vmware and ubuntu, so obviously the answer is that it works

usb_claim_interface error -6

FATAL: Failed to open rtlsdr device.

did you check it on the internet? many answers there, most probably you need to blacklist the dvb_usb_rtl28xxu kernel module for this dvb dongle (this module used for watching tv using the dongle)

 

[sq5bpf]

newbie here buddy....how you update to the new version ?

the easiest for you would be to remove the old version, and git clone and compile again

but the software is intended for people who have at least a basic understanding of linux, if you have such problems, then better familiarize yourself with it first. it will be much more fun to use if you do.