I store important family videos onto blank DVD disks. I make 100% par sets and store them onto
2 other DVDs...hopefully even if the DVDs develop
bad parts I can still rebuild the avi file from the Pars.
I store the DVDs with the pars inside 3 layers of
ziplock bags...along with one of those little dehumidifier packets....just in case it is moisture that damages DVDs.
Ummm... have you seen those tiny Dish Network uplink dishes on peoples houses... with the little feedhorn thingies out at the feedpoint:-)
Just how much power do you think those are uplinking the signal 23,000+ miles with???
A friend of mine uses one and we backed the signal off several db by masking part of the dish... the signal was barely degraded.
And the bandwidth is not too bad either...
1 watt is a LOT of power at 2.4 ghz using a dish.
I'm certain that they aimed the dish by sending out the signal with an omnidirectional radiator like a small whip.... the dish at one end of a 72 mile link could easily pick out the signal from the whip.... guys are having lots of fun with 8ft+ dishes up in the hollywood hills...connecting to 802.11b cards in computers many miles away.
Line of sight is the key here... heck the human eye could see a wide-bandwidth signal from a flashlight from many miles away if it was on a mountain... you can see headlights on individual cars from the shuttle if they are out on the desert alone... and they are pointed at the ground:-)
1 watt + 2ft dish at 2.4ghz would put a useable signal into a satellite in geosync orbit.
72 miles seems modest as far as range goes... the gain with a good 2ft dish at 2.4ghz is pretty extreme.
If it is line-of-sight at 72 miles the signal should be way way above the noise.
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Lots of great titles too, though mostly they are classics.
I have bought some classic titles from Taiwan and Hong Kong with good results.
I store important family videos onto blank DVD disks. I make 100% par sets and store them onto 2 other DVDs...hopefully even if the DVDs develop bad parts I can still rebuild the avi file from the Pars. I store the DVDs with the pars inside 3 layers of ziplock bags...along with one of those little dehumidifier packets....just in case it is moisture that damages DVDs.
Ummm... have you seen those tiny Dish Network uplink dishes on peoples houses... with the little feedhorn thingies out at the feedpoint :-)
Just how much power do you think those are uplinking the signal 23,000+ miles with???
A friend of mine uses one and we backed the signal off several db by masking part of the dish... the signal was barely degraded.
And the bandwidth is not too bad either...
1 watt is a LOT of power at 2.4 ghz using a dish.
I'm certain that they aimed the dish by sending out the signal with an omnidirectional radiator like a small whip.... the dish at one end of a 72 mile link could easily pick out the signal from the whip.... guys are having lots of fun with 8ft+ dishes up in the hollywood hills...connecting to 802.11b cards in computers many miles away.
Line of sight is the key here... heck the human eye could see a wide-bandwidth signal from a flashlight from many miles away if it was on a mountain... you can see headlights on individual cars from the shuttle if they are out on the desert alone... and they are pointed at the ground :-)
1 watt + 2ft dish at 2.4ghz would put a useable signal into a satellite in geosync orbit. 72 miles seems modest as far as range goes... the gain with a good 2ft dish at 2.4ghz is pretty extreme. If it is line-of-sight at 72 miles the signal should be way way above the noise.