Difference between revisions of "RpiDATV"
| Line 6: | Line 6: | ||
Latest version is now hosted on [https://github.com/F5OEO/rpidatv github]. All instructions to build is there. | Latest version is now hosted on [https://github.com/F5OEO/rpidatv 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. | 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. | + | In future, only some released versions could be built based on github sources. |
| + | First documentation ([http://f5oeo.fr/UglyDATV01.pdf UglyDATV01.pdf]) is '''obsolete''' | ||
== Main output modes of operation == | == Main output modes of operation == | ||
Revision as of 13:19, 16 May 2016
RpiDATV
RpiDATV is a software running on raspberry pi micro computer written by Evariste F5OEO. 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 First documentation (UglyDATV01.pdf) is obsolete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 : RBMod, digilite, digithin, F4DAY, F1FAU , F1DJO, 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