[MLB-WIRELESS] Re: Microwave links (fwd)

[Random]

http://www.qsl.net/n9zia/wireless/page09.html

A great page, the first link "Wireless Network Link Analysis" I think is
what you want and then some..

---
Martin Laukkanen (random at sectoid.org) 

-----Original Message-----
From: Shane Chubb [mailto:s.chubb at tronics.com.au] 
Sent: Tuesday, 3 September 2002 9:25 AM
To: melbwireless at wireless.org.au
Subject: RE: [MLB-WIRELESS] Re: Microwave links (fwd)


On the topic of EIRP.

Does anyone know of an online calculator for working out output ie: EIRP
- in particular one which will take into account cable loss so you would
feed in info such as this: 
Card output: 100mw
Antenna gain: 24dB
Cable type: LMR-400
Cable length: 30Meters
And you would be presented with a figure as your total output.

Shane

-----Original Message-----
From: Michael Nardella [mailto:michael at nardella.com.au]
Sent: Tuesday, 3 September 2002 12:45 AM
To: melbwireless at wireless.org.au
Subject: RE: [MLB-WIRELESS] Re: Microwave links (fwd)



Yeah, and I like how it's "just under 4w eirp"

Michael

-----Original Message-----
From: owner-melbwireless at wireless.org.au
[mailto:owner-melbwireless at wireless.org.au]On Behalf Of sanbar
Sent: Tuesday, 3 September 2002 12:04 AM
To: melbwireless at wireless.org.au
Subject: [MLB-WIRELESS] Re: Microwave links (fwd)


Is this claim right?
It's from another mailing list ... bit at the bottom too about a 30km
link.
- Barry

--
barry park
http://wireless.bur.st/ ||| community wireless project
http://wireless.org.au/ ||| melbourne wireless node bca -=all your
http_get are belong to us=-

---------- Forwarded message ----------
Date: Mon, 02 Sep 2002 20:51:34 +0800
Subject: Re: Microwave links

Microwave links would only interfeer with eachother if they are running
on the same freqency(channel). with 802.11b, you have 11 channels to
chose from. Only 3 of these are truly individual due to the overlap. Ch
1, 6 and 11. However, on ch 11, if you output 4W EIRP(legal limit) you
are actually putting out more power than is legal due to the overlap
into ch 12+ which AFAIK isn't legal to transmit on.

Speaking of microwave links, we have just established a link that
stretches just under 30km here in WA. It goes from the 'HillsHub' to a
site i manage
(DVNet) in
Doubleview. presently we are having a few small problems due to a
firmware on the card at HillsHub, but other than that, we have a very
usable link (at
5.5Mbit)
This is using an 18dBi Galaxy dish and a 35mW Cabletron card at HH, and
a Cisco 352 series card (100mW) and a 24dBi Galaxy dish at DVNet(with a
long cable run, so its just under 4W EIRP).



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