Tuesday, 15 October 2013
I recently bought a used Scientific Atlanta D9020 MPEG2 encoder for
peanuts on eBay it can be seen in the top photo. Of course it has a
270 Mbits/s DVB-ASI output. A challenge! So I am now making a DVB-ASI
to USB2 converter using mostly off the shelf parts.
The ASI decoding will be done using one of the little FPGA boards I wrote
about in my CQ-TV FPGA article. I have had to replace the stock 50 MHz
oscillator on the board with a 27 MHz one but apart from that it should be
fine. The USB2 part will use one of the FTDI development boards. I am
currently making a small interface board to connect the two together and
to provide the 75 ohm coax line interface.
I will keep you updated on this project as I am sure there will be other people
who want an inexpensive means to import Transport Streams over USB2
from DVB-ASI devices.