[MLB-WIRELESS] Wireless connection -1200m apart

[vak at alphalink.com.au]

Yeah, but the 2.4Ghz Class licence for DSSS modulation restricts you to
4000mW regardless of whether you're a licenced HAM or not.

Which brings me to the point that currently, .g gear is "technically"
illegal in Aus at the moment (as is Super G/108mbps) - it's not covered by
the determination (see Note 1). 

Most 802.11g AP's are 30-100mW output devices, wheras legally they are only
allowed to operate at 10mW EIRP. You certainly wouldn't want to use SuperG
outside - especially if it hogs all available channels - forget about
coexistance with neighbouring AP's (but that's a different argument).

The reason 802.11g gear is illegal is because the current class licence
(Note 1) doesn't cover OFDM modulation, it only covers DSSS (ie 802.11b).

On a side note - there's a nice radiofrequency spectrum plan/chart some of
you might like:
http://www.aca.gov.au/radcomm/frequency_planning/spectrum_plan/arsp-wc.pdf


Documents of relevance:

Note 1: 2.4Ghz DSSS Class licence determination

http://www.aca.gov.au/aca_home/legislation/radcomm/acts/radcom/spread_2002.p
df


Note 2: Spread Spectrum power levels & how they should be measured:
http://www.aca.gov.au/aca_home/legislation/standards/radspread_03.pdf


Regards,

Vaskos
----------------------

Original Message:
-----------------
From: Mark Aitken vk3jma at net2000.com.au
Date: Wed, 18 Feb 2004 19:19:07 +1100
To: jmoir at jmcs.net.au, phil at soundguy.id.au, craig.mead at pagesmith.com.au,
melbwireless at wireless.org.au
Subject: Re: [MLB-WIRELESS] Wireless connection -1200m apart


At 02:06 PM 2/18/04 +0800, Jamie Moir wrote:


>Sure, there is a small matter of the law however. You cant legally exceed
>36dB at the antenna, so a 25dBi ant, plus an 18dB AP is 43dB before cable
>loss. way way way too much.


Ham Radio Licence!!!!!!

Mark


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