Netgear MA311 User's Guide download pdf (Page 32)

Wireless Channel Selection

IEEE 802.11 wireless nodes communicate with each other using radio frequency signals in the ISM

(Industrial, Scientific, and Medical) band between 2.4 GHz and 2.5 GHz. Neighboring channels are

5 MHz apart. However, due to spread spectrum effect of the signals, a node sending signals using a

particular channel will utilize frequency spectrum 12.5 MHz above and below the center channel

frequency. As a result, two separate wireless networks using neighboring channels (for example,

channel 1 and channel 2) in the same general vicinity will interfere with each other. Applying two

channels that allow the maximum channel separation will decrease the amount of channel

crosstalk, and provide a noticeable performance increase over networks with minimal channel

separation.

Channel Center

Frequency

Frequency Spread

1 2412 MHz 2399.5 MHz – 2424.5 MHz

2 2417 MHz 2404.5 MHz – 2429.5 MHz

3 2422 MHz 2409.5 MHz –2434.5 MHz

4 2427 MHz 2414.5 MHz –2439.5 MHz

5 2432 MHz 2419.5 MHz – 2444.5 MHz

6 2437 MHz 2424.5 MHz –2449.5 MHz

7 2442 MHz 2429.5 MHz –2454.5 MHz

8 2447 MHz 2434.5 MHz – 2459.5 MHz

9 2452 MHz 2439.5 MHz –2464.5 MHz

10 2457 MHz 2444.5 MHz –2469.5 MHz

11 2462 MHz 2449.5 MHz – 2474.5 MHz

12 2467 MHz 2454.5 MHz – 2479.5 MHz

13 2472 MHz 2459.5 MHz – 2484.5 MHz

Note: The available channels supported by the wireless products in various countries

are different. For example, Channel 1 to 11 are supported in the U.S. and Canada,

and Channel 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.

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Netgear MA311 User's Guide Page 32