Tetra decoding

[on7ndr]

first choose open (left) and go to telive folder , click on receiver_grc 1 udp
than you see things rolling and also "generate" like your photo
BUT than you must go to RUN tab after the generate, and click and choose "EXECUTE"
than if you have no error, you will see the receiver.
to activate live tetra, cd telive/./rxx
now installed my telive with easy install script also, works also very good
good luck de on7ndr

 

[on7ndr]

install automatic with txt file install.TXT

tetra receiving live via telive sq5bpf , rtl820t genuine dongle

automatic "easy install script " for ubuntu 16.04 lte or debian...

FIrst Download my txt file (attachment here) and paste (copy) it to your Destop in linux

than rename the txt file to "install.sh" (RIGHT CLICK RENAME)

than open terminal and give 3 commands in same window

1. cd Destop
2. chmod +x install.sh
3. ./install.sh

wait intill easy telive installer begins

give password for installing.

than term cd tetra/osmo-tetra-sq5bpf/src
./receiver1udp 1

than term cd tetra/telive
./rxx
than term cd tetra/telive/bin
./tetrad

than term : gnuradio-companion


open flowgraph from telive gnuradiocompanion folder >>> 1 simple grc _37 receiver

execute by pressing green play triangle or under run execute.

 

[steed]

hi,

i have just made a fresh install of Linux Mint 18 Sarah, everything seem to be compiled fine, when i start the flowgraph under gnuradio 3.7.9, i got PLL NOT LOCKED !

linux; GNU C++ version 5.3.1 20151219; Boost_105800; UHD_003.009.002-0-unknown

Using Volk machine: avx_64_mmx_orc
gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.9
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy redpitaya
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
[R82XX] PLL not locked!
Exact sample rate is: 2000000.052982 Hz
[R82XX] PLL not locked!

>>> Done

anyone has experienced the same issue ?

regards
73'

 

[on7ndr]

Yes Steed , is normal with rtl2832uhid dongle. the same message here always.

your software is ok . will work !!!! just use gqrx to find your tetra network in the uhf band and

a tetra network has a bandwith of 25 khz and always on 425-429 mhz here.....

the uplink frequency is always 10 mhz lower , just fer info.

there you must can find some unencrypted in your area .

maybe in your area 390 mc downlink and 380 mc uplink

also on 435 mc amateurs using also tetra.



remember that you always must a PPM value from 75 to insert in the receiver when its on screen (gnuradio-companion) top-block-py

than you are exactly on the frequency. for gqrx the use please same use 75 PPM for rtl2832uhid /rt820t dongle

installing gqrx with command " sudo apt-get install gqrx"
to start gqrx , just type " gqrx " in your terminal.....

note the exact frequency's that you have found on paper and then start up the telive procedure.... commands...etc

good luck de on7ndr .

 

[steed]

Yes Steed , is normal with rtl2832uhid dongle. the same message here always.
your software is ok . will work !!!! just use gqrx to find your tetra network in the uhf band and
a tetra network has a bandwith of 25 khz and always on 425-429 mhz here.....
the uplink frequency is always 10 mhz lower , just fer info.
there you must can find some unencrypted in your area .
maybe in your area 390 mc downlink and 380 mc uplink
also on 435 mc amateurs using also tetra.

remember that you always must a PPM value from 75 to insert in the receiver when its on screen (gnuradio-companion) top-block-py

than you are exactly on the frequency. for gqrx the use please same use 75 PPM for rtl2832uhid /rt820t dongle

installing gqrx with command " sudo apt-get install gqrx"
to start gqrx , just type " gqrx " in your terminal.....

note the exact frequency's that you have found on paper and then start up the telive procedure.... commands...etc

good luck de on7ndr .

Hi on7ndr,

thx for your quick response

i live in France, TETRA is here between 424.500-430 , on 390 it's TETRAPOL , a national emergency encrypted network, (police, fireman ect ...)

in fact i have already running Telive on a another computer but under Linux Mint 17.3, i never got PLL NOT LOCKED message so far ... what i'm surpised.


thx anyway
73'

 

[on7ndr]

Steed , happy to hear that everything is o.k
i am no specialist in linux , just using skywave linux upgraded to ubuntu 16 xenia... 64 bit
and cubicsdr,qt5radio,gqrx,tetra,,dsd, xdx dx cluster all working good

for your info qt5 radio is a "sdr" which you can remotely controll a other sdr server radio (auround world)
its free off charge , and have several dsp servers auround the world.
it has lsb,fsk,am,cwu,cwl,rtty and sound realy good.

qt5 radio is standard in the live ISO off skywave linux.
fldigi is also standard.
use synaptic to download packages or direct via ubuntu softwarecenter.

gd lck de on7ndr .

 

[sniper1990]

someone tryed or, there is anny chance to use telive on raspberry pi 3 ? br'

Thanks a lot for telive tetra programm.Al work perfect in my dualcore 2,8ghz
One ask sq5bpf
Its a possibility to make it for xenial ubuntu arm64?
Like for odroid and raspberry

 

[ET-NL]

Question,

Is there somebody who has a GNU radio script for a sdrplay receiver and wants to share this script?? Or tips how to change the default scripts to fit this receiver.

ET

 

[grosminet]

Question,

Is there somebody who has a GNU radio script for a sdrplay receiver and wants to share this script?? Or tips how to change the default scripts to fit this receiver.

ET

I made some test with modified version of before 1.8 version using an airspy.grc with 4M sample rate. It can work but but there are some trouble with stopping receive even with Core I7 and usb3 . I never found the way to increase some parameters like buffers , usb settings . So I gave up . Now I m using airspy and I have better results . I think sdrplay is better but TETRA grc arn't made for sdrplay .
I asked to gqrx or cubicsdr developper to modify there softwares in order to run TETRA decode through IQ or UDP but I never had any good answer . I asked to sdrplay team to see could be done but I didn't have also answers .
Again sorry for mistakes and bad english , I lack of practice !!

 

[ET-NL]

Thanks for your reply.
Do you want to share your test script so I can try if it works for me.

I will keep the tip for the airspy in my mind, but the sdrplay is already bought now...

ET

 

[Spain-73]

Raspberry pi 3 - question and comments

good Morning everybody from Madrid
First of all thanks to Jacek for this incredible software.
I have just ran script on RP 3 and it all seems ok.. but when I execute the 1 ch simple pipe file in gnuradio, the receiver pops up a sec and then it disappears. I'¡ve been reading the thread but it seems I can't find other suggestion but something related to use udp instead of pipe receivers. is this the solution?
I remember also something about runing gnuradio first of all in order to generate some needed files. Is this other solution or mistake I'm making?
Thanks in advance for all the community interest and dedication.
Anybody from Spain here?
73
tony

 

[skinkie]

RaspberryPi 3 setup

Long time no see all. Doing normal work too So today I set up a RPi3 with DVB-T2 dongle. I already knew my old dongle was a bit flacky some would say I might have destroyed it by static electricity. Using my custom gnublock code I am able to tune into three channels on a RaspberryPi3 and have some headroom left. I still see improvements possible but I just want to let you know that for a few bucks you can run the code and do more than before.

If anyone has used the alternative Tetra decoding implementations, I am also interested to read about it.

 

[Spain-73]

Question Telive/RB3

Hello
Nice post you just kicked in!
May I ask you .... why does the double-spectrum screen just pops up and the dissapears in my set up? I'm using RB pi3, easy install script (everything ok) and then this happens!!
May it be I'm using pipes instead of UDP?
Any answers are welcome! It seems there are some issues with the audio from RBP3, should I use an external souncard to have audio?
Thanks in advance.

 

[webexcel82]

Long time no see all. Doing normal work too So today I set up a RPi3 with DVB-T2 dongle. I already knew my old dongle was a bit flacky some would say I might have destroyed it by static electricity. Using my custom gnublock code I am able to tune into three channels on a RaspberryPi3 and have some headroom left. I still see improvements possible but I just want to let you know that for a few bucks you can run the code and do more than before.

If anyone has used the alternative Tetra decoding implementations, I am also interested to read about it.

Hi skinkie, you con share your gnublock or teach how to modify the included on telive low block?? I wear a month on trying, but I can not get two channels on the raspberry pi 3 and you have 3!! Nowadays i get two chanels working whit around a 40% of processor charge, but lots of stutter on sound. Stutter only disappear with single chanel decoding (around 34% of processor charge)
Thank you in advance

 

[skinkie]

Hi skinkie, you con share your gnublock or teach how to modify the included on telive low block?? I wear a month on trying, but I can not get two channels on the raspberry pi 3 and you have 3!! Nowadays i get two chanels working whit around a 40% of processor charge, but lots of stutter on sound. Stutter only disappear with single chanel decoding (around 34% of processor charge)
Thank you in advance

Have you read blog.opentetra.nl? Specifically on the compilation instructions and volk_profile?

 

[Spain-73]

raspberry pi 3

Good Morning
I just need a short guide to make telive work on RP3. Everything installed ok but the flowgraph just pops up and then dissapear!.
any help will be much appreciated.
73
Tony

 

[webexcel82]

Have you read blog.opentetra.nl? Specifically on the compilation instructions and volk_profile?

Thanks for the link. Not used the volk profile because sq5bpf says on page 69 of this thread:
"also beware NOT to run volk_profile , and erase ~/.volk/volk_config if you did. for some reason optimisation doesn't work on this raspberry"

I'm trying to re-installing all using the opentetra blog instructions and post here the results.

 

[skinkie]

Thanks for the link. Not used the volk profile because sq5bpf says on page 69 of this thread:
"also beware NOT to run volk_profile , and erase ~/.volk/volk_config if you did. for some reason optimisation doesn't work on this raspberry"

I'm trying to re-installing all using the opentetra blog instructions and post here the results.

Very interesting claim. I am running with volk_profile, physically in one location I have very good reception. In my second I can't tune the thing unto the signal, but I doubt that has anything to do to volk_profile.

What I did figure out. A RPi3 at this performance really needs the stock 2.5A power supply. Don't replace it with cheap stuff.

 

[hamradionl]

RECORD I/O wav

I am not a guru, like ask if possible to record i/o wav file ?
How to setup recording i/o wav file ?

 

[skinkie]

RECORD I/O wav

I am not a guru, like ask if possible to record i/o wav file ?
How to setup recording i/o wav file ?

Do you mean I/Q output (as in raw sampled input of the antenna) or do you mean audio of people talking?