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Re: Ricochet update- Auction

so you are saying that since Ricochet is 30 dBm, does that mean if Cringely
has a 7 dBi (for point to point), that would be ok?  That would mean I would
need to antennas for a setup that did both point-to-point and
point-to-multipoint, no?

----- Original Message -----
From: "Thomas Edwards" <>
To: "Charles Bolton" <>
Cc: "Brandon Macmillan" <>; <>;
"Don Papp" <>
Sent: Friday, August 10, 2001 7:22 AM
Subject: Re: Ricochet update- Auction

>
> BTW, on the American side, Part 15 gives a maximum output to spread
> spectrum devices of 1 Watt (30 dBm).  Directional antennas up to 6 dBi can
> be used.  Above 6 dBi, transmitter power must be decreased from 1 Watt(30
> dBm) either:
>
> 1 dB for every 1 dBi over 6 dBi for point-to-multipoint, or
> 1 dB for every 3 dBi over 6 dBi for point-to-point links.
>
> I've closely analyzed Cringely's 21 dBi directional yagi for a
> point-to-point link with Airports.  Since Airports are only 15 dBm, he can
> add another 15 dBi before he gets to 30 dBm equivalent, so the 21dBi
> antenna (15 dBi + the "free" 6 dBi) is cool.
>
> Of course, I doubt the FCC would ever look into something like this unless
> you are breaking the golden rule of Part 15, causing interference,
> specifically, enough to make someone complain.
>
> -Thomas
>
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