Hello,
for décoding audio in DMO mode, where is it possible to buy tetrapol station (TPH 700 etc..) at the best price ? Or what model ?
Thx you.
----- Mail original -----
De: "Jan Hrach" jenda@yakumo.hrach.eu À: "Atariman@laposte.net" atariman@laposte.net, tetrapol-kit@brmlab.cz Envoyé: Mercredi 13 Avril 2016 17:23:52 Objet: Re: [Tetrapol-kit] Help tu use tetrapol kit
You did not run make as is described in the README?
On 13.4.2016 11:06, Atariman@laposte.net wrote:
The problem is i dont't have the file tetrapol_dump. I think i must to compile the files in the app folder but how can i do ?
---- Jan Hrach a écrit ----
You don't have tetrapol_dump in PATH. Either add it there or use full path.
Scan with scan.hs http://scan.hs ?
No, just use your favourite SDR tool, e.g. gqrx.
Finally, if i haven't got tetrapol station connected ( TPH 700 or 900 or other ) i can't decode audio. Correct ?
Correct. And usually you can't decode even if you have a station, because it's just encrypted.
If i understand, the RP-ACELP codecs will be available later, and it will not be necessary to have external station for decoding the voice ?
We hope so.
On 9.4.2016 20:33, atariman@laposte.net mailto:atariman@laposte.net wrote:
if i do : ./demod.py http://demod.py -c 2882 -p 44 -g 40 -O "tetrapol_dump -t TCH"
Returning : Using Volk machine: avx_64_mmx_orc /bin/sh: 1: tetrapol_dump: not found file_descriptor_sink: Bad file descriptor
Tetrapol_dump not found, what is the problem ?
"Scan for Tetrapol traffic. It is 12.5kHz wide buzzing (when demodulated as FM) usually in the 380-420 tel:380-420MHz band." Scan with scan.hs http://scan.hs ? There is no example or information to use the file scan.sh http://scan.sh in the demod folder
"Compute the ARFCN of your station. We believe it is (f-358399864)/12500. E.g. a station at 394425 tel:394425 kHz is channel number 2882."
Finally, if i haven't got tetrapol station connected ( TPH 700 or 900 or other ) i can't decode audio. Correct ?
If i understand, the RP-ACELP codecs will be available later, and it will not be necessary to have external station for decoding the voice ?
The project is young, and good luck, it's very interesting to decode tetrapol
*De: *"Jan Hrach" <jenda@yakumo.hrach.eu mailto:jenda@yakumo.hrach.eu> *À: *atariman@laposte.net mailto:atariman@laposte.net, tetrapol-kit@brmlab.cz mailto:tetrapol-kit@brmlab.cz *Envoyé: *Samedi 9 Avril 2016 19:59:40 *Objet: *Re: [Tetrapol-kit] Help tu use tetrapol kit
I think now the RP_CELP codec are available
No, that is some basic version that does not produce intelligible audio. If you happen to see an unencrypted network, you can try to decode some audio via our web service (currently offline).
I need to compile it ? How ? cmake ? and how to use it ?
I think everything needed is in https://brmlab.cz/project/sdr/tetrapol/howto
On 9.4.2016 18:00, atariman@laposte.net mailto:atariman@laposte.net wrote:
And for information. I don't have the file tetrapol_dump in the APP FOLDER.
Just : tetrapol_dump.c cmakelist.txt http://cmakelist.txt tetrapol_build.c
I need to compile it ? How ? cmake ? and how to use it ?
*De: *"Jan Hrach" <jenda@yakumo.hrach.eu mailto:jenda@yakumo.hrach.eu> *À: *atariman@laposte.net mailto:atariman@laposte.net, tetrapol-kit@brmlab.cz mailto:tetrapol-kit@brmlab.cz *Envoyé: *Samedi 9 Avril 2016 17:28:36 *Objet: *Re: [Tetrapol-kit] Help tu use tetrapol kit
And a lot of files in TMP FOLDER are available examples : cch_392045910.json http://392045910.json channel392045910.bits http://channel392045910.bits
Well, if they contain reasonably-looking information, then you have a working receiver!
how to use the kit for listening ?
https://brmlab.cz/project/sdr/tetrapol/audio
If i lauch ./sysop_env.sh http://env.sh i think there is an error of missing .cfile
This seems to expect a pre-recorded cfile... But it does not matter, as your receiver seem to work.
On 9.4.2016 13:17, atariman@laposte.net mailto:atariman@laposte.net wrote:
Hello, i leave in France with tetrapol trames available. All install is ok. I use RTL key SDR.
I made a TMP folder in the DEMOD directory
I launch ./tetrapol_detector.sh http://detector.sh I return : sample rate: 2400000 tel:2400000 decim: 150 output sample rate: 16000 tel:16000 samples per symbol: 2 channel[0]: -1 frequency=393515515, offset=734217 Hz Using Volk machine: avx_64_mmx_orc channel[1]: -1 frequency=392047081, offset=-734217 Hz channel[2]: -1 frequency=392946409, offset=165111 Hz channel[3]: -1 frequency=393325813, offset=544515 Hz channel[4]: -1 frequency=392826967, offset=45669 Hz channel[5]: -1 frequency=393206371, offset=425073 Hz channel[6]: -1 frequency=392256690, offset=-524608 Hz channel[7]: -1 frequency=393396073, offset=614775 Hz
Freq 393515515 tel:393515515 freq err: 2001 freq: 734617.261646 tel:734617.261646 Freq 392047081 tel:392047081 freq err: 366 freq: -734143.850073 Freq 392946409 tel:392946409 freq err: 994 freq: 165309.823303 tel:165309.823303 Freq 393325813 tel:393325813 freq err: 1613 freq: 544837.590405 tel:544837.590405 Freq 392826967 tel:392826967 freq err: 360 freq: 45740.961414 tel:45740.961414 Freq 393206371 tel:393206371 freq err: 843 freq: 425241.643213 tel:425241.643213 Freq 392256690 tel:392256690 freq err: 581 freq: -524491.716589 Freq 393396073 tel:393396073 freq err: 1311 freq: 615037.154883 tel:615037.154883
Freq 393515515 tel:393515515 freq err: 1962 freq: 735009.723584 tel:735009.723584 Freq 392047081 tel:392047081 freq err: 358 freq: -734072.181348 Freq 392946409 tel:392946409 freq err: 977 freq: 165505.293518 tel:165505.293518 Freq 393325813 tel:393325813 freq err: 1585 freq: 545154.581641 tel:545154.581641 Freq 392826967 tel:392826967 freq err: 460 freq: 45832.910699 tel:45832.910699 Freq 393206371 tel:393206371 freq err: 823 freq: 425406.229443 tel:425406.229443 Freq 392256690 tel:392256690 freq err: 573 freq: -524377.189514 Freq 393396073 tel:393396073 freq err: 1402 freq: 615317.472778 tel:615317.472778
Freq 393515515 tel:393515515 freq err: 1558 freq: 735321.261206 tel:735321.261206 Freq 392047081 tel:392047081 freq err: 292 freq: -734013.718341 Freq 392946409 tel:392946409 freq err: 777 freq: 165660.597095 tel:165660.597095 Freq 393325813 tel:393325813 freq err: 1259 freq: 545406.324341 tel:545406.324341 Freq 392826967 tel:392826967 freq err: 237 freq: 45880.384836 tel:45880.384836 Freq 393206371 tel:393206371 freq err: 657 freq: 425537.629602 tel:425537.629602 Freq 392256690 tel:392256690 freq err: 458 freq: -524285.634351 Freq 393396073 tel:393396073 freq err: 1135 freq: 615544.542529 tel:615544.542529
And a lot of files in TMP FOLDER are available examples : cch_392045910.json http://392045910.json channel392045910.bits http://channel392045910.bits
etc ...
And now ? What can i do ? how to use the kit for listening ?
If i lauch ./sysop_env.sh http://env.sh i think there is an error of missing .cfile
gr-osmosdr v0.1.4-72-g164a09fc (0.1.5 tel:0.1.5git) gnuradio 3.7.9.1 http://3.7.9.1 built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy redpitaya data/391.cfile http://391.cfile: No such file or directory
FATAL: can't open file
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.
sample rate: 0 decim: 125 output sample rate: 0 samples per symbol: 0 Traceback (most recent call last): File "./demod/demod.py http://demod.py", line 166, in <module> tb = top_block() File "./demod/demod.py http://demod.py", line 78, in __init__ raise ValueError('Output name template missing "%%".') ValueError: Output name template missing "%%".
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-- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E
-- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E
-- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E