Tetrapol-kit March 2017

tetrapol-kit@brmlab.cz

6 participants
7 discussions

Bit ranking in voice frame
by Xilokar 08 Jan '18

08 Jan '18

Hi, I was wondering how the bit positions in voice frames were found (I am talking of voice_frame.py in rp-celp repo) I can not find the info in PAS 0001-7: Version 1.0.3 (so much for a specification...) I am trying to decode Q & ph for each subframe in order to feed the excitation signal in the filters, but there seems to be some incoherency either with my own received frames (that I was not able to test) or with the voice_tones sample from the transmit repo. Regards, Xilokar

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M9620 power supply
by kévin B 23 Mar '17

23 Mar '17

Hello. I would like to plug my g2 radio with a 4.8 V power supply. I plug the -/+ pins but nothing happens, no way to start it. I found the power pins with a simple voltmeter. I had saw this explanations: http://brmlab.cz/project/sdr/tetrapol/g2 but I don't understand if I have to use an existing battery for "id". I have 2 batteries that have worked but now empty. I would like to have some experts advices. Best regards.

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Re: [Tetrapol-kit] Tetrapol-kit Digest, Vol 9, Issue 5
by Evgenii Royzman 11 Mar '17

11 Mar '17

Hi, Thank for this files, works great, i have the same results as you sent! But i yet cant understood with value of sync after demodulation, why is it "1, 0, 1, 0, 0, 1, 1" (7-bit)? I look in standard PAS 0001-2 6.1.5.2 (voice) and PAS 0001-2 6.2.5.2 (data) and there 8-bit sync with value 0, 1, 1, 0, 0, 0, 1, 0. >From previous question about IDE, now using QT, very user friendly, attach Makefile and go) P.S. Would be very useful if somebody have files with voice, interesting compare. Regards, Evgenii 2017-03-11 12:04 GMT+02:00 <tetrapol-kit-request(a)brmlab.cz>: > Send Tetrapol-kit mailing list submissions to > tetrapol-kit(a)brmlab.cz > > To subscribe or unsubscribe via the World Wide Web, visit > https://brmlab.cz/cgi-bin/mailman/listinfo/tetrapol-kit > or, via email, send a message with subject or body 'help' to > tetrapol-kit-request(a)brmlab.cz > > You can reach the person managing the list at > tetrapol-kit-owner(a)brmlab.cz > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Tetrapol-kit digest..." > > > Today's Topics: > > 1. app/tetrapol_dump (Evgenii Royzman) > 2. Re: app/tetrapol_dump (JS) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 9 Mar 2017 11:56:57 +0200 > From: Evgenii Royzman <dzhudzhan(a)gmail.com> > To: tetrapol-kit(a)brmlab.cz > Subject: [Tetrapol-kit] app/tetrapol_dump > Message-ID: > <CAEixV-L5VTbxktfQz3Au7fmbrm-5mesznTq64uu7zL9TsV4v8w@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi guys! > > You did really cool work with tpol. > > I'm also trying something with this one and you results is absolutely find > for my! > > I have already demodulated signal and would decode it with your > app/tetrapol_dump, is it real or i have to use binary only after your > demod? > > Regards, > > Evgenii >

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Re: [Tetrapol-kit] app/tetrapol_dump
by JS 11 Mar '17

11 Mar '17

Hi, please keep mailinglist in cc, for others to find out. in tetrapol_dump is implemented SCR detector. It tries all 128 possible values and finds out wich one works. By design SCR is system constant for controll channels (CCH) and for transport channels (TCH) is broadcasted on CCH. I have attached small file with demodulated data and example outputs, hope this help a bit. It is CCH with system_info and few other messages. With best regards, JS On Fri, 10 Mar 2017 10:22:52 +0200 Evgenii Royzman <dzhudzhan(a)gmail.com> wrote: > Hi, > > Very sad. > > But in plan I want to realize it and ready for reverse. > > Yet have several question: > > 1. do you have records with known parameters. > > This need me for debug my decoder subsystem. > I use the same sequence (descrambling, diffdec(UHF, VHF), > deinterleaving(UHF, VHF), ch.decoding (based on Viterbi described in > https://www.amazon.com/Digital-Communications-Fundamentals-Applications-2nd…), > crc, descr), but unknown parameters of my records confusing me, > especially metrics after Viterbi (no zero values for every SCR > [0,127]). > > 2. can i get bitstream from your system after ch.decoder by tee, > cose i use something like "./tetrapol_dump -i /myPath/1.bin -b UHF -t > TCH -d DOWN | tee /myPath/output.bin" and in result have only part of > terminal info after "Exiting."(you can see it in previous attaches). > Or even better get bitstream from different parts, after > deinterleaving for example. > Or is this real only after change source code and recompile it? If > true, back to question from previous letter about IDE (i think about > Eclipse CDT with switch to your makefile). > > Will be thank for any feedback. > > Regards, > > Evgenii > > 2017-03-09 18:36 GMT+02:00 JS <jiri.svoboda(a)yandex.com>: > > > vocoder is not producing anithing listenable, need a lot of work > > (and a bit of reverseingeneering). > > > > JS > > > > > > On Thu, 9 Mar 2017 17:39:46 +0200 > > Evgenii Royzman <dzhudzhan(a)gmail.com> wrote: > > > > > Hi, > > > > > > Thank for advice, now I can see some results during decoding and > > > some tee. Will try vocoder. > > > > > > P.S. If you interesting in attach examples of my tests. > > > > > > Regards, > > > > > > Evgenii > > > > > > 2017-03-09 14:40 GMT+02:00 Evgenii Royzman <dzhudzhan(a)gmail.com>: > > > > > > > Sorry sent press Send instead attach) > > > > > > > > One more file in attach. > > > > > > > > I also wanted to know what IDE you use to debug your project, > > > > and maybe you have some example of records I/Q or binary after > > > > demodulation with known parameters (SCR, -b, -t, -d) I would be > > > > very pleasure! > > > > > > > > I try my own system in java and this sources very imported for > > > > me. > > > > > > > > P.S. attached records from > > > > http://www.sigidwiki.com/wiki/Tetrapol > > > > > > > > Sorry for separate letters) > > > > > > > > Regards, > > > > > > > > Evgenii > > > > > > > > > > > > 2017-03-09 14:29 GMT+02:00 Evgenii Royzman > > > > <dzhudzhan(a)gmail.com>: > > > >> HI, thank for quick response! > > > >> > > > >> As I understood, tetrapol_detector.sh set parameters for > > > >> receive signal from air via sdr and demodulate it. My binary > > > >> file already demodulated by another demodulator (file in > > > >> attach). > > > >> > > > >> My question about, can I decode my record with you decoder > > > >> (tetrapol_dump) and which extension, reverse, invert e.t.c? Or > > > >> I anyway need to install tetrapol_detector.sh? > > > >> > > > >> I have tried to use command like: "./tetrapol_dump > > > >> -i /myPath/1.bin -b UHF(and VHF) -t TCH(and CCH ) -d DOWN(and > > > >> UP) | tee /myPath/output.bin" but at once had "Exiting." on > > > >> next line with no any info in terminal and zero output.bin. > > > >> > > > >> 2017-03-09 13:33 GMT+02:00 JS <jiri.svoboda(a)yandex.com>: > > > >> > > > >>> Hi, > > > >>> > > > >>> after demodulation you should use tetrapol_dump. I suggest > > > >>> you to study tetrapol_detector.sh which shows what tools are > > > >>> used and what they do. > > > >>> > > > >>> With best regards, > > > >>> JS > > > >>> > > > >>> On Thu, 9 Mar 2017 12:21:10 +0200 > > > >>> Evgenii Royzman <dzhudzhan(a)gmail.com> wrote: > > > >>> > > > >>> > Hi guys! > > > >>> > > > > >>> > You did really cool work with tpol. > > > >>> > > > > >>> > I'm also trying something with this one and you results is > > > >>> > absolutely find for my! > > > >>> > > > > >>> > I have already demodulated signal and would decode it with > > > >>> > your app/tetrapol_dump, is it real or i have to use binary > > > >>> > only after your demod? > > > >>> > > > > >>> > Regards, > > > >>> > > > > >>> > Evgenii > > > >>> > > > >>> > > > >>> > > > >> > > > > > > > > > >

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app/tetrapol_dump
by Evgenii Royzman 09 Mar '17

09 Mar '17

Hi guys! You did really cool work with tpol. I'm also trying something with this one and you results is absolutely find for my! I have already demodulated signal and would decode it with your app/tetrapol_dump, is it real or i have to use binary only after your demod? Regards, Evgenii

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app/tetrapol_dump
by Evgenii Royzman 09 Mar '17

09 Mar '17

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Re: [Tetrapol-kit] Help tu use tetrapol kit
by Jan Hrach 04 Mar '17

04 Mar '17

You did not run make as is described in the README? On 13.4.2016 11:06, Atariman(a)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(a)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:380-420>MHz 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(a)yakumo.hrach.eu <mailto:jenda@yakumo.hrach.eu>> >> *À: *atariman(a)laposte.net <mailto:atariman@laposte.net>, tetrapol-kit(a)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(a)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(a)yakumo.hrach.eu <mailto:jenda@yakumo.hrach.eu>> >>> *À: *atariman(a)laposte.net <mailto:atariman@laposte.net>, tetrapol-kit(a)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(a)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:0.1.5>git) 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 "%%". >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Tetrapol-kit mailing list >>>> Tetrapol-kit(a)brmlab.cz <mailto:Tetrapol-kit@brmlab.cz> >>>> https://brmlab.cz/cgi-bin/mailman/listinfo/tetrapol-kit >>>> >>> >>> >>> -- >>> 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 -- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282E

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Tetrapol-kit March 2017