802.11

[Ben Duncan]

Which prolly 'plains why the nice new feature laden 2.4GHZ digital
telephone I have at my house (For Wife's Christmas present) does not
work. It picks up all SORTS of squawks, modem and "rushing" wind sounds.

Works fine up here at the office.

I guess some tech savvy neighbor decided MORE is better with their wireless.

Me, I just hard wired my house with Cat 5e ...

David Bandel wrote:
> On 1/5/06, Man-wai CHANG <mwchang at i-cable.com> wrote:
> 

<SNIP>

> 
> Which is why the power levels are so low.  At 4W, doing yourself or
> others harm is not possible (boosting power is not recommended, it
> amplifies noise as well as signal).  That said:
> 
> Connect a high gain antenna (24+ db) to a 200mW card and your are now
> putting out 47db (approx 50 watts).  Now throw in an amplifier (let's
> say a 30db or 1W amplifier -- easily accessible at HyperLinkTech) and
> you're now putting out 54db or 251 watts.  (note: power doubles every
> 3 db, so add 3db and multiply output watts by 2).
> 
> Microwave ovens start at 600 watts.  Using the same 1 watt amp and a
> 30db antenna and you _will_ burn yourself (thats 1000 watts output --
> definitely a microwave) or kill anyonein the house that has a
> pacemaker implant.
> 
> You can buy 5W amps for 2.4GHz.  Connected to a 34db antenna and your
> radiated power is now around 14,000 w.
> 
> The Government of Panama approved the above transmitter (13771 W)
> within a National Park on an often visited mountain top to transmit a
> signal 166 miles.  At that distance, the receiver needs an attenuator
> (or deliberate misalignment of the antennas) because that amount of
> power (37db taking into account free space loss and a near stone-deaf
> receiver capable of only hearing -86db or stronger signals) at that
> distance can over drive the receiver.  It has probably either caused
> or been a factor in the deaths of some tourists on that mountain.  It
> also causes 2.4GHz wifi to be unusable within miles of the mountain.
> 
> Ciao,
> 
> David A. Bandel
> --
> Focus on the dream, not the competition.
>             - Nemesis Air Racing Team motto
> 
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> 
> .
> 

-- 
Ben Duncan   - VersAccounting Software LLC 336 Elton Road  Jackson MS, 39212
"Never attribute to malice, that which can be adequately explained by stupidity"
        - Hanlon's Razor