Example of the creation of a multiplex stream of 2 DAB stations
From Opendigitalradio
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Latest revision as of 03:55, 28 November 2009
[edit] Creation of a multiplex stream of 2 DAB stations
CRC-DabMux -A ./maxxima.mp2 -b 160 -i 1 -p 3 -A ./fb2.mp2 -b 128 -i 2 -p 3 -S -L "Maxxima" -C -i1 -S -L "Le Mix" -C -i0 -S -L "Banane" -C -i2 -S -L "MeyrinFM" -C -i1 -O file://racor.eti
Creation of an ETI stream of 2 DAB stations out of 2 pre-encoded MPEG Layer II files (maxxima.mp2 and fb2.mp2, encoded using toolame). Service linking of labels "Maxxima" and "MeyrinFM" to maxxima stream.
Result is recorded in an ETI file called "racor.eti"
[edit] Modulation and transmission of the recorded file
The file can then be modulated and played on a USRP for RF modulation using the following command:
CRC-DabMod ./racor.eti -l -g1 -r3200000 |CRC-Dwap.py -r3200000 -f-222064000 -u
In this example, ETI file is modulated with CRC-DabMod on baseband at a sampling frequency of 3.2MHz and then baseband signal is played on USRP with CRC-Dwap.py and upconverted at the frequency of 222.064MHz (channel 11D)
Please look at Example of live re-transmission on DAB of an Internet Radio radio station for more details about the commands