Dtv

Clock Loop

While running some projects of mine, I noticed that dtv could be selectively interrupted, from over 10 feet through a wall. Most likely my specific combination of wire, parts and program struck a perfect note to do some dtv screaming.

So I looked into dtv and found a link to a dude using linux, who was able to make a dtv transmitter with a video card dac.
But only did it by creating a harmonic of the target signal.

dtv VIDEO transmission was not the dudes goal, he was just displaying still images.
It got me thinking about ways to use harmonics to do upper end manipulation with the prop.

Any thoughts?

MagIO2

May I ask what DTV is?

Clock Loop

SDTV - Standard Definition Television

http://en.wikipedia.org/wiki/Digital_television



ATSC DTTV

http://en.wikipedia.org/wiki/Digital_terrestrial_television


http://en.wikipedia.org/wiki/ATSC_Standards

Leon

It's illegal.

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Leon Heller
Amateur radio callsign: G1HSM

Clock Loop

Leon said...
It's illegal.

Uhh, the whole move to DTV was to "open up the bandwidth" for other uses.

Wasn't that the whole reason google bought a chunk?

I recall something about some of it being available for local use, similar to xbee.

Clock Loop

Google didn't win, but this point was made:

Your Mom said...

The FCC is considering what to do with the unused television bandwidth. It has not opened it up, in part, because of concerns that services would unwittingly interfere with television station signals.

In its letter, Google maintains that the risk of such signal corruption is low and that Google, as well as other wireless device providers, have technology that can check when an airwave is not in use, ensuring TV stations remain clear.

Google has a history of getting what it wants from the FCC. Though it didn’t win any airwaves, it won a more important battle to keep certain spectrum blocks “open” to any wireless device provider. Last summer, the FCC ruled that some spectrum would be kept open. Moreover, Verizon — a big winner in the spectrum auction — pledged to keep many of its newly acquired airwaves open access.

Google’s desire for openness is understandable. A more accessible Internet likely means more Google users. Moreover, the company is developing an open source platform for mobile devices which could use the available television airwaves to surf the Web, download software, and make calls. Handsets using Google’s “Android” platform will become commercially available this year, according to Google’s letter. “Android-powered handsets… would be an excellent match for the TV white space,” wrote Whitt.

www.businessweek.com/the_thread/techbeat/archives/2008/03/googles_plans_f.html