Netgear MA 301 用户手册

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IEEE 802.11 wireless nodes communicate with each other using radio frequency signals in the ISM 
(Industrial, Scientific, and Medical) band between 2.4Ghz and 2.5Ghz.  Neighboring channels are 5Mhz 
apart.  However, due to spread spectrum effect of the signals, a node sending signals using a particular 
channel will utilize frequency spectrum12.5Mhz 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. 
 

1 

2412Mhz 

2399.5Mhz – 2424.5Mhz 

2 

2417Mhz 

2404.5Mhz – 2429.5Mhz 

3 2422Mhz 2409.5Mhz 

–2434.5Mhz 

4 2427Mhz 2414.5Mhz 

–2439.5Mhz 

5 

2432Mhz 

2419.5Mhz – 2444.5Mhz 

6 2437Mhz 2424.5Mhz 

–2449.5Mhz 

7 2442Mhz 2429.5Mhz 

–2454.5Mhz 

8 

2447Mhz 

2434.5Mhz – 2459.5Mhz 

9 2452Mhz 2439.5Mhz 

–2464.5Mhz 

10 2457Mhz  2444.5Mhz 

–2469.5Mhz 

11 

2462Mhz 

2449.5Mhz – 2474.5Mhz 

12 

2467Mhz 

2454.5Mhz – 2479.5Mhz 

13 

2472Mhz 

2459.5Mhz – 2484.5Mhz 

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

 
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.