popularmechanics.com — Each 700-MHz cellular antenna can service a larger footprint, which means fewer cells will be required overall. That should, theoretically, make it cheaper to build a national wireless network. However..."the dirty little secret of cellular data is that two customers with Slingboxes can take down an entire EVDO cell?. Yikes!
Jan 24, 2008 View in Crawl 4
lolinyerfaceJan 25, 2008
Don't mind Google, they're just taking over the world...Fixed that for you.
mt4055Jan 25, 2008
@brufleth: You receive more harmful radiation from walking to your car on a sunny day than you would from any radio sources you might be exposed to.That's it. I'm not going to work any more. Evil sun!
mt4055Jan 25, 2008
And if it wasn't regulated, the spectrum would be totally useless because every hobbiest radio operator, independent TV station and Indian down the street would be doing what ever they want with it at what ever power they wanted.In the 60's, Wolfman Jack became famous while broadcasting over the Mexican "border blaster" XERB. Immortalized by George Lucas in the 1973 film, "American Graffiti". This is still happening to some extent. <a class="user" href="http://en.wikipedia.org/wiki/Border_blasters">http://en.wikipedia.org/wiki/Border_blasters</a>
mt4055Jan 25, 2008
Right about what?
hollyminkowskiJan 25, 2008
RF is basically a sine wave, the lower the frequency of the sine wave the lower the amount of data that it can carry.Data is usually impressed upon the sine wave by varying its frequency and or amplitude.If you went all the way down to say the ridiculous frequency of 1hz or one sine wave cycle/second it is easy tosee that very little data could be sent on such a wave.Don't confuse this with the methods used to carry ethernet data on household 60hz electrical wiring...this is notthe same sort of thing as the 60hz signal is not modulated with the data, the wire is simply used to carry signals in addition to the normal 60hz ac.
ogoreJan 25, 2008
Radio/ TV waves have a much bigger wavelength than normal light only the ones on the other side of the spectrum are small enough to interfere with our DNA and cause cancer.
funkywoodJan 26, 2008
OK. First result is <a class="user" href="http://www.apple.com/iphone/">http://www.apple.com/iphone/</a>Now what?
reddikilowattJan 27, 2008
Don't modern coding schemes (OFCOM, QAM, QPSK) make a lot better use of spectrum by sending multiple bits at a time? For example, 256 QAM on a cable system can push 8 bits/symbol at 5.7M symbols/sec. It doesn't matter where on the spectrum it is, just that the signal ends up being 6MHz wide.