Netgear MA521 User Manual download pdf (Page 21)

Wireless Channel Selection

802.11b

IEEE 802.11b 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 cross talk, and provide a noticeable performance increase

over networks with minimal channel separation.

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.

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

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Netgear MA521 User Manual Page 21