[MLB-WIRELESS] Dirty big dish...

[Tony Langdon, VK3JED]

At 08:25 PM 20/06/2002 +1000, you wrote:

> >>
> >> It's likely that it will give you to much gain, even if you
> >> did make a 2.4 GHz to feed it (such as a cantenna).
> >>
> > It's not possible to have too much gain. ;-)
>
>Legally speaking, it is. Not that it is a real issue in practice.

In most cases, it isn't, because there are usually enough losses (with the 
30 mW cards, at least) to pull the EIRP back to a legal figure.  In any 
case, we want to run legal.  If we're to get any credibility with the 
Government in the inquiry, we should seek to operate legally, where the 
bounds are known.

> > Simply use some of the better wi-fi gear that allows one antenna to be
> > used for Tx and another for Rx.
> > Use the large dish for Rx and a smaller dish for Tx.
> > The WAP-11 and other Linksys gear will do it.
> > The Mikro Tik gear will too.
> > And so will all the 350 series Cisco stuff.
>
>Nup. It's diversity. Transmit and receive is always done on the same antenna.
>Whichever antenna gives the highest receive signal strength, that is the one
>used.
>
>Again, those two antenna outputs are NOT TX and RX. They are simply two 
>choices
>of antenna for the radio to use for communication, e.g. in case one 
>antenna has LoS
>to the other node the other antenna doesn't.
>If in doubt, check the circuit diagrams around on the net.

This is why I queried this suggestion.  I was always under the impression 
the dual antennas were only for diversity.

73 de Tony, VK3JED
http://vk3jed.vk.irlp.net