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Felix Rublack frubi at frubi.netHi Ari, On 17.12.2012 10:37, Ari Kaspari wrote: > In your Picture > http://tetra.osmocom.org/trac/graphviz/caf863214dab2ac9e1beead8b122318020ecb403.dot.png > it seems to me, that I only need PCM Samples from my radioscanner. > Thus I think i can stream the discriminator output via soundcard > (PCM-Samples) into a linux pipe and use this pipe for your omso-tetra tool. > > Is this possible? > Or is my radioscanner not possible to "stream" the correct channel pattern? No, i don't think so. Your radio scanner does FM demodulation. But the TETRA signal is modulated with Pi/4-DQPSK (or QAM - not supported by osmocom-tetra). So the real information is already lost, when it comes out of the discriminator output. The FUNcube Dongle (linked schematics) does no demodulation. It just digitise the I/Q-Data and puts it in the left/right channel of the PCM stream. Greetings Felix