| reply to Karl Bode
Re: Why not for the US? Yuck - do yo really want to use a toothbrush that is several months old? |
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1 edit | Yes, if I brush my teeth once a month 
I'll believe this when I see it. There is no way a 100 mW transmission can traverse 60 miles (line of sight I presume -- useless), especially with all the interference in the 2.4 GHz band. Software is good but not that good. |
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| It is possible, LOS is the keyword. Ever thought how the 1W transmitters in the directway satellite systems can reach a satellite that is 22,000 miles away? LOS... |
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 fireflierCoffee. . .Need CoffeePremium
join:2001-05-25
Limbo | Well, that and HIGHLY directional antennas. . . |
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 NOCManMacChatterPremium
join:2004-09-30
Colorado Springs, CO | Only 1W? How high up are those satellites? I've ran setups to 23,000miles and we'd have to push a few dozen watts just to get through heavy clouds and a lot more if it was raining really bad.
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Mac Chatter
»www.macchatter.net |
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| reply to fireflier
Yes, but antennas are hardware. Wi-Fi gear uses a half-dipole with a tiny 2.16 dBi gain and this article claims using existing Wi-Fi gear. Also consider the carrier frequency, noise figure and lack of line-of-sight (multiple reflections).
Allow me to remain a skeptic... |
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 exocet_cmBuckle up, it's the lawPremium
join:2003-03-23
New Orleans, LA
kudos:2 | reply to MrBentor
said by MrBentor:Yuck - do yo really want to use a toothbrush that is several months old? Wait, there is a lifespan on toothbrushes? I don't replace mine till I go to the dentist and I have teeth in great shape and clean too (according to the dentist... and my girlfriend).
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"I have measured out my life with coffee spoons..." - T.S Eliot
Ma Blog »www.johndball.com
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| reply to NOCMan
I agree with you, but remember,in a sat terminal you are amplifying a wide spectrum(multiple channels). A direcway, any other residential sat setup only needs to amp a small carrier.
It is just like many Wireless ISPs that use 5 and 10MHz channel widths to increase range instead of the standard 20MHz Wi-Fi channels.
I was a direcway customer about 5 years ago and used to lose sync every time a dark cloud got in the way.
BTW, I still have the equipment, If anyone wants it. |
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 maartenaElmoPremium
join:2002-05-10
Orange, CA
kudos:1
 ·AT&T U-Verse
 ·DIRECTV
| reply to NOCMan
QUESTION:
What's the power for Cassini's transmitter?
ANSWER from FAQ on June 3, 1999:
It's 20 watts. Received at the DSN antennas, the signal power is 10 to
the -16th (0.0000000000000001) watts. From Saturn, the signal takes
about 1 hour and 20 minutes to reach Earth.
Conclusion: You don't need a whole lot of power to send a signal.... and to receive a signal, you need even less.
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"Any society that would give up a little liberty to gain a little security will deserve neither and lose both" -
Benjamin Franklin, Founding Father. |
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