Difference between revisions of "RpiDATV"
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=== IQ === | === IQ === | ||
I/Q modulation is provided out of 2 pins of the GPIO header. | I/Q modulation is provided out of 2 pins of the GPIO header. | ||
| − | Hardware I/Q modulator is needed : [[RBTVMOD]], [http://www.g8ajn.tv/dlindex.html digilite], digithin, [http://jf.fourcadier.pagesperso-orange.fr/television/exciter/exciter_e.htm F4DAY], [http://acauquelin.free.fr/site_f1fau/usb_fifo_qpsk.html F1FAU] , [http://f4agc.free.fr/ F1DOJ], [http://f6kbf.free.fr/pdf/RpiDATV%20IQ%20avec%20Modulateur%20DMD-2401.pdf old broadcast modulators]. | + | Hardware I/Q modulator is needed : [[RBTVMOD]], [http://www.g8ajn.tv/dlindex.html digilite], |
| + | [http://www.batc.org.uk/forum/viewtopic.php?f=97&t=4145&sid=64b441d2c41529ad302e6287ca7684fc digithin] , [http://jf.fourcadier.pagesperso-orange.fr/television/exciter/exciter_e.htm F4DAY], [http://acauquelin.free.fr/site_f1fau/usb_fifo_qpsk.html F1FAU] , [http://f4agc.free.fr/ F1DOJ], [http://f6kbf.free.fr/pdf/RpiDATV%20IQ%20avec%20Modulateur%20DMD-2401.pdf old broadcast modulators]. | ||
=== DATV Express === | === DATV Express === | ||
Revision as of 14:30, 16 May 2016
RpiDATV
RpiDATV is a software running on raspberry pi micro computer written by Evariste F5OEO (mail twitter). It encodes video and compute the QPSK baseband modulation.
History and updates
Latest version is now hosted on github. All instructions to build is there. Before that, complete SD image could be downloaded but size of download files is huge (1.2GBytes). Updates of image are also hard to maintain. In future, only some released versions could be built based on github sources. First documentation (UglyDATV01.pdf) is obsolete
Main output modes of operation
RF output (formaly named Ugly mode)
RF could be transmitted without any other hardware through a pin of the Raspberry pi header. It is mainly a test mode as QPSK spectrum is not filtered. By using harmonics it could be received directly by a set top box on L band.
IQ
I/Q modulation is provided out of 2 pins of the GPIO header. Hardware I/Q modulator is needed : RBTVMOD, digilite, digithin , F4DAY, F1FAU , F1DOJ, old broadcast modulators.
DATV Express
Send IP Transport stream to DATVExpress Server (G4GUO).
Credits
Brian G4EWJ : baseband QPSK process for arm
INSPIRED BY THE IMPLEMENTATION OF PIFMDMA by Richard Hirst <richardghirst@gmail.com> December 2012