802.11A Legal Power Output And Wireless Channels - NETGEAR WAG311 Installation Manual

Installation Guide for the NETGEAR Dual Band Wireless PCI Adapter WAG311
The radio frequency channels used in 802.11b/g networks are listed in
Table B-2: 802.11b/g Radio Frequency Channels
Channel Center Frequency
1 2412 MHz
2 2417 MHz
3 2422 MHz
4 2427 MHz
5 2432 MHz
6 2437 MHz
7 2442 MHz
8 2447 MHz
9 2452 MHz
10 2457 MHz
11 2462 MHz
12 2467 MHz
13 2472 MHz
Note: The available channels supported by the wireless products in various countries are different.
For example, Channels 1 to 11 are supported in the U.S. and Canada, and Channels 1 to 13 are
supported in Europe and Australia.
The preferred channel separation between the channels in neighboring wireless networks is 25
MHz (5 channels). This means that you can apply up to three different channels within your
wireless network. There are only 11 usable wireless channels in the United States. It is
recommended that you start using channel 1 and grow to use channel 6, and 11 when necessary, as
these three channels do not overlap.

802.11a Legal Power Output and Wireless Channels

IEEE 802.11a utilizes 300 MHz of bandwidth in the 5 GHz Unlicensed National Information
Infrastructure (U-NII) band. Though the lower 200 MHz is physically contiguous, the FCC has
divided the total 300 MHz into three distinct domains, each with a different legal maximum power
output. Below is a table of summary for different regulatory domains.
B-8
Frequency Spread
2399.5 MHz - 2424.5 MHz
2404.5 MHz - 2429.5 MHz
2409.5 MHz - 2434.5 MHz
2414.5 MHz - 2439.5 MHz
2419.5 MHz - 2444.5 MHz
2424.5 MHz - 2449.5 MHz
2429.5 MHz - 2454.5 MHz
2434.5 MHz - 2459.5 MHz
2439.5 MHz - 2464.5 MHz
2444.5 MHz - 2469.5 MHz
2449.5 MHz - 2474.5 MHz
2454.5 MHz - 2479.5 MHz
2459.5 MHz - 2484.5 MHz
Table B-2:
Wireless Networking Basics