[NLRS] First tests with DVB-T dongle, ATV angle

[Douglas H Reed]

<http://www.youtube.com/watch?v=r0Fb8NVUELE>
I haven't watched the video but Bill N0MNB posted it about the DATV
test they ran.

The original discussions about DVB were nearly 10 years ago if I
remember right. I think it was around 2005 when the Dayton ATV
repeater was switched to DVB-S. The Chicago ATV group also started
using DVB-S a couple years later and reported some excellent DX with
slow rate signals. SInce it is a digital signal, it was good or
perfect quality reception where analog ATV would have been very snowy
or maybe just raster.

I believe the discussion eliminated DVB-C QAM because the multipath
was random and changing so a mode designed for cable wasn't considered
a good choice. I believe they went to DVB-S because of robust error
correction and the capability of slowing down the data rate if there
was only one video signal. There was a reason they didn't use DVB-T. I
really don't remember....

73, Doug Reed, N0NAS.

On 7/17/12, Chris Elmquist <chrise at pobox.com> wrote:
> or QAM but both of these seem insanely complicated to generate at amateur
> price points, especially if you want to send LIVE video.  You need
> some pretty serious computational horsepower to do full frame rate MPEG
> encoding-- which is always harder to encode than to decode.
>
> Was the experiment that was performed able to transmit live video?
>
> Chris N0JCF