BATC Forum

A trawl of the internet gives me lots of ways of filtering and generating lots of RF but I seem to be missing quite an important bit. (don't say its genetic..)

What are you guys using to take a video signal, mpeg it and then modulate something?

That seems to be the 'missing box' in all the pictures etc I have seen.

Cheers
Lee
G4TNX

Hi, I notice no reply for over a month so let me give it a go.

To borrow the concept from SPARS ( http://en.wikipedia.org/wiki/SPARS_Code ) ... The path differs depending on your source being digital or analogue.

A pure "DDD" digital path using say SR-Systems boards ( http://www.sr-systems.de/V02/content.ph ... &style=std ) might look like this:

Digital camera --> Firewire --> Mac/PC --> AES/EBU + HDMI to SDI --> SDI to ITU 656 --> ITU 656 to DVB ASI/SPI (DVB MPEG2 TS) --> DVB TS to L band (RF) -> Filter+AMP -> ANT

I would assume most people are using the "AAD" approach (everything analogue except the TX), which (using the RS boards again) might look something like this:

Analogue camera --> video baseband + audio --> [ optional mixer / TBC etc ] --> Analogue to DVB ASI/SPI (DVB MPEG2 TS) --> DVB TS to L band (RF) --> Filter + AMP --> ANT

Let me know if that helps or simply confuses more, it might be easier for me to draw it.


Justin