possible low cost uP based DVB-S modulator

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markaren1
Posts: 59
Joined: Sat Sep 10, 2011 8:49 pm

possible low cost uP based DVB-S modulator

Post by markaren1 » Wed Aug 05, 2015 5:38 pm

Hello All,

Just been playing with the BeagleBone Black. Loaded Debian 7, V4L2, and the Hauppauge PVR-USB2 drivers with very few problems. The main processor for this board is an AM3358 SoC, and has a 1GHz ARM Cortex-A8 main core with 4G eMMC and 512MB DDR3 RAM.

Also on board the SoC are a pair of 200MHz 32 bit microprocessors, each with their own programme, and data memory spaces. There is also a bank of memory shared between these processors and the ARM. Search word for these aux processors is Programmable Real-Time Unit (PRU). See https://www.youtube.com/watch?v=By9foc1iJ3Q

It may be possible to implement a DVB-S modulator using these PRUs, including digital filtering (?) with outputs feeding an IQ DAC, then a suitable up-converter to RF frequency of choice.

Can't help but think that this amount of extra hardware based realtime processing might be of use to the digital video community.

Regards, Mark
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