User’s Manual for the NETGEAR Double 108 Mbps Wireless PC Card
802.11b/g Wireless Channels
IEEE 802.11b/g 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
The radio frequency channels used in 802.11b/g networks are listed in Table
Table | 802.11b/g Radio Frequency Channels | ||
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Channel | Center Frequency | Frequency Spread |
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1 | 2412 MHz | 2399.5 MHz - 2424.5 MHz |
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2 | 2417 MHz | 2404.5 MHz - 2429.5 MHz |
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3 | 2422 MHz | 2409.5 MHz - 2434.5 MHz |
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4 | 2427 MHz | 2414.5 MHz - 2439.5 MHz |
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5 | 2432 MHz | 2419.5 MHz - 2444.5 MHz |
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6 | 2437 MHz | 2424.5 MHz - 2449.5 MHz |
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7 | 2442 MHz | 2429.5 MHz - 2454.5 MHz |
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8 | 2447 MHz | 2434.5 MHz - 2459.5 MHz |
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9 | 2452 MHz | 2439.5 MHz - 2464.5 MHz |
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10 | 2457 MHz | 2444.5 MHz - 2469.5 MHz |
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11 | 2462 MHz | 2449.5 MHz - 2474.5 MHz |
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12 | 2467 MHz | 2454.5 MHz - 2479.5 MHz |
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13 | 2472 MHz | 2459.5 MHz - 2484.5 MHz |
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Wireless Networking Basics |
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August 2004
