range

Anyone who have come across tests where ranges of wireless access points are
compared?
They might all deliver 100 mW, but it is highly variable how far they reach.

Thanks,
Knud

"og54" <(E-Mail Removed)> hath wroth:

>Anyone who have come across tests where ranges of wireless access points are
>compared?
>They might all deliver 100 mW, but it is highly variable how far they reach.

The typical access point belches about 35mw (15dBm). Some can do
100mw (20dBm). A 6dB power increase is good for twice the range. 12
dB is good for 4 times the range. Etc. The power increase has to be
at both ends or you don't get any increased range.

The range is large determined by the antennas at both ends, the level
of local interference, and the amount of obstructions in the line of
sight path.

For fairly conventional access points and laptops, with the stock
antennas, Intel did some indoor range testing. See:
| ftp://download.intel.com/business/bs...nt/hotspot.pdf
Search the PDF for the word "Range". There are several tables. I
strongly recommend reading the entire document as it gives a good
basic technical presentation of how wireless works.

Part of the range table is duplicated in the FAQ at:
| http://en.wikibooks.org/wiki/Wireles...ance_and_Speed
I think the ranges are a bit optimistic, but should be achievable with
decent hardware (i.e. not junk).

As for what can be achieved, see:
| http://www.wifi-shootout.com
for a 125 mile link.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

[POSTED TO alt.internet.wireless - REPLY ON USENET PLEASE]

In <(E-Mail Removed)> on Sun, 28 May 2006 17:23:06
-0700, Jeff Liebermann <(E-Mail Removed)> wrote:

>For fairly conventional access points and laptops, with the stock
>antennas, Intel did some indoor range testing. See:
>| ftp://download.intel.com/business/bs...nt/hotspot.pdf
>Search the PDF for the word "Range". There are several tables. I
>strongly recommend reading the entire document as it gives a good
>basic technical presentation of how wireless works.
>
>Part of the range table is duplicated in the FAQ at:
>| http://en.wikibooks.org/wiki/Wireles...ance_and_Speed
>I think the ranges are a bit optimistic, but should be achievable with
>decent hardware (i.e. not junk).

Moved to <http://wireless.wikia.com/wiki/Wi-Fi#Performance_and_Speed>

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>