1.3mi PtP link. Suggestions?

[josh sauer]

Using DD-WRT you can kick the power up to 200mw, but I would recommend
against it.  I have read from other users that it will significantly reduce
the life of the WRT54G's.  Running at 100 - 125mw might be a better option,
if you can get a little more gain from the antenna.

Please note, I am not an expert on this and my advice is just that...
advice.  There is a lot of discussion about Linksys routers at
linksysinfo.org that you might want to check out.  People there can give you
a good idea on the limits that they have run into with the device.


On 12/13/06, Ken Caruso <ken at ipl31.net> wrote:
>
> On Wed, 2006-12-13 at 11:05 -0500, Steve Mickeler wrote:
> > I'm in the planning stages of a 1.3mi link. It's a NLOS situationdue to
> > some trees and rooftops.
>
> Your calculations look good, but physical obstacles are real killers
> especially at greater distances.
>
> >
> > I'm planning to use 2 x linksys WTR54GL units running DD-WRT.
> >
> > Based on the following calculations, using a 2400MHz Tx frequency, the
> > 1.31mi distance, along with a 200mW Tx power, -80dBm Rx sensitivity, 1dB
> > loss for connectors and cable, and 14dB antenna gain on the Tx and Rx, I
> > get a Theoretical System Operating Margin of 23.5 dB.
>
> Where do you get the 200mw Tx power? Is that what the WRT54GL is rated
> at? It sounds high for a linksys product. Is it using a power hack?
>
> >
> > This is using a helical antenna, chosen because it is of a circular
> > polarization and according to my research, the best for getting through
> > and around obstructions.  Now I may be incorrect on this which is why
> I'm
> > asking here.
>
> There is really only one way to find out. However 1 mile without LOS, I
> would not get my hopes too high.
>
> -Ken
>
> >
> > The antenna specs can be found here :
> > http://www.wade-antenna.com/Wade/Helical.PDF
> >
> > Would anyone care to comment on this setup?
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>
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