Tetrapol-kit

tetrapol-kit@brmlab.cz

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tetrapol-kit
by didier bodon 26 Dec '20

26 Dec '20

bonjour je suis intéressé par tetrapol kit tu n'aurais pas une image Vmware pour avancer dans se travail merci

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broken frame sync error
by Jean-Philippe Buchet 20 Dec '20

20 Dec '20

Heelo to all, thanks to a friend who has prepared an exploitable tetrapol-kit on kali and raspberry 4 I ca play with. The hings are complex for my old brain to undertand the sources :) I got some unencrypted communications and I am very happy. ( unfortunately I can't use my SDRPlay receivers RSP1A and RSP2) I get oftenly a lot sync_fail or broken frames. The RF signals are very good and strong. I try to change rf gain values, sure about the ppm correction of the key. Do you have another idea or tune something to prevent the losses ? Anyway, warm thanks and big applause to the coders ! I wish to all a very good christmas and happy new year 2021. JPhi

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Tetrapol-kit
by ok1zoo＠kmitocty.cz 12 Oct '20

12 Oct '20

Hi all. Just for information Tetrapol-kit does not work anymore, because python was updated to version 3. Demodulation scripts containing incompatible instructions and variables. Tha same situation is unfortunately with Jenda's FCL. FCL works, but it does not calculate filters correctly and many channel combinations are unusable. S pozdravem / Best regards Martin Kukla OK1ZOO Webmaster of sites: HTTPS://WWW.KMITOCTY.CZ

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MC9620
by Xilokar 27 Sep '20

27 Sep '20

Hi all. I spent some time on reversing the mc9620. I have almost found the jtag interface (I say almost because it is not reliable, and I cannot use it to stop and debug the processor) Nevertheless, I managed to dump the firmware of the tetrapol 55522d chipset, an Atmel arm7tdmi that share some design with old at91 chips I found some stuff (message queue, state machine, gui). But what is important and that I would like to share with you is that I found some info on how it interfaces to the Texas C54 dsp, and that I was able to extract the dsp firmware, where surely all the undocumented things happen (voice and encryption). I am know focusing on reversing the dsp firmware (not an easy task). If anybody is interested in helping, don't hesitate ! Best

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rp-celp
by guerlande 02 Jun '20

02 Jun '20

Hi, I try to decode unencrypted TETRAPOL voice frames. I looked at your RP-CELP (I understand that it is not finished). Sometime, I can hear something close to human voice. Nice :) The first problem seems to be the bit orders. The tetrapol specs says 37 bits for the LARs cooefs, and in RP-CELP, there are 38 bits for the LARs. In the other hand, there are 9 bits for the last sig+phase cooef, and the specs says 10 bits. Do you found that the real tetrapol codec does not follows exactly the specs ? Best regards Guerlande Sent with [ProtonMail](https://protonmail.com) Secure Email.

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How does Tetrapol kit work?
by Chuck Norris 30 Jan '19

30 Jan '19

Hello I need help with the tetrapol kit. I do not know what to do with it. Is it possible to encode tetrapol at all?

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./tetrapol_tx.py -i ./transmit.bits freeeze with some computers in USB3
by fe8769 13 Jul '18

13 Jul '18

hello list We have some trouble on differents computers in USB3 output and hackrf. The transmission is freezing with no reason . We have to stop the batch and unplug and re plug the hackrf . There is no link with files size or other Using the same disk in an USB2 computer, the tetrapol_tx can run for days . We had this on many different computers and linux version . We have some computers working fine on USB3 , we took the disk to another and we have the problem Any help is welcome --

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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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TP ADDRESS FRAME
by WaaX 04 Nov '17

04 Nov '17

Hello, When am trying to decode TP_ADDRESS.txt from the transmit package with tetrapol_dump the output are : { "event": "scr", "scr": 4 } { "event": "frame", "rx_offs": 160, "rx_time": "2017-10-28T15-39-20.832292", "frame": { "frame_no": null, "state": "ok", "syndromes": 0, "bits_fixed": 0, "type": "DATA", "asb": [1, 0], "fn": [1, 0], "data": { "encoding": "hex", "value": "7fffa301f0100000" } }} { "event": "frame", "rx_offs": 320, "rx_time": "2017-10-28T15-39-20.832835", "frame": { "frame_no": null, "state": "ok", "syndromes": 0, "bits_fixed": 0, "type": "DATA", "asb": [1, 0], "fn": [1, 1], "data": { "encoding": "hex", "value": "0209ffffffff7bf6" } }} But when am trying yo build them with tetrapol_build the result are not same : Original: 0101001110011011110000100100001010110110110011000001011110101100010010111010001101101110101011010001000110010001110001001111010000010000110111111011000000101011 1101001101110101000000011110100011110100000000100011110101000000011000011111000101001111100001101010110100100111100101111100010000100000101111001110111001111011 Builded with tetrapol_build 1100101011111111000010111100000001011101001011000111100010111011110100110101010001000110101010010111101111000001111000110010110000001000111111001101000111010010 1100101011111011001000100101000101111101100110101111100010110011100101010000011011010100001010000011001111000000101000010011010000000000001101011111010101100010 The address are encoded specificly like frame voice (forward_voice) ? (Am trying to add new features to sending the good address on the tetrapol_tx.py) Kind Regards, TenGbps.

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dotaz
by Martin Kukla 17 Oct '17

17 Oct '17

Chtěl bych se zeptat jako lama, když už se tetrapol kit evidentně nevyvíjí, budu nucen se hrabat přímo do něj a pravděpdobně měnit vypisované hlášky přímo v něm, abych nemusel pořád používat "grep" a "sed", alespoň pro provozní informace. Podle všeho se jedná o "tsdu_print.c", pokud tomu dobře rozumím, mělo stačit udělat jen znovu kompilaci, nebo je potřeba nějaké delší procedura ? Druhým problémem je, že tetrapol kit špatně vypisuje ID okolních buněk (opět jsou otočená čísla MSW a BTS), tak jak tomu bylo špatně u výpisu základních informací o buňce, než to Sysop opravil. ------------------------------------------------------ S pozdravem Martin Kukla OK1ZOO Webmaster: http://www.kmitocty.cz Tel.nr.: 00420 776489335

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