RpiDATV

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 First documentation (UglyDATV01.pdf) is obsolete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 datv express : Datv Express Server (G4GUO).

Native interfaces

rpidatv could be configured through several ways

• Command line
• Menu on console (from local keyboard/screen or via network)
• Graphical menu with a touchscreen : video demonstration

External interfaces

• Audio/Video are sent from an external PC running VMix software : Vmix2Rpi

Credits

Brian G4EWJ : baseband QPSK process for arm

INSPIRED BY THE IMPLEMENTATION OF PIFMDMA by Richard Hirst <richardghirst@gmail.com> December 2012