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Showing posts with label T-207. Show all posts
Showing posts with label T-207. Show all posts
13 February 2021

install, run and test GNU Octave against T207 and CIS-11 streams

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updated This is just a quick how-to for Octave since some friends asked me for some tips about the installation and use of Octave with some ...
17 July 2020

CIS-14 FSK 100Bd/2000 (CIS 3x100)

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Interesting 100Bd/2000 FSK signal spotted on 16059.5 KHz (CF), most likely a Russian Governative transmission. This signal is not a separa...
14 July 2020

demodulating sync F7B mode transmissions using F7B.exe software

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F7B signal, apparently a "classic" MFSK-4 My friend cryptomaster coded a program (F7B.exe) for demodulating synchronous F7B...
1 comment:
26 September 2018

CIS-14 FSK 100Bd/1000 (prob. Russian AF)

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FSK transmission heard today on 13994.8 KHz (cf) at 0930z, contents are T-207 encrypted. Possibly from Russian AF. https://yadi.sk...
13 September 2018

CIS-14 FSK 100Bd/500

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Yet another CIS-14 format 100Bd/500 FSK signal spotted on 9075.0 CF around 0810z (11 Sep) with good SNR. User is likely from Kaliningrad O...
27 June 2018

CIS-14 FSK 96Bd/500

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Although the name FSK 96Bd/500, the used shift of this sytem is 480 Hz. Speed is 96Bd and the two 5-bit data words are bit-interleaved ...
22 June 2018

redefining T-207 (CIS-14) checksums

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T-207 ( T-207, T-207 2M "VIKTORIA" - Soviet teletype encryption device ) is a multiplexed two channels "system" that ...
13 August 2016

CIS-14 FSK 96Bd/1000

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The characteristic of CIS-14 FSK-2 is the 14-bit length frame, in this recording shift is 1000Hz and speed 96 Bd. This signal has been...
7 July 2016

T-207 recognition in CIS VFT systems

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Some days ago I heard some CIS VFT systems and in particular one of them, a six  100Bd/120Hz channels, caught my attention. I already...