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Crestron Best Practices RF Products

NOTE: Due to the large amount of interference that can come from 2.4 GHz

cordless phones, baby monitors, and microwaves, it is recommended that you use a

Wi-Spy device to perform wireless site surveys.

NetStumbler

NetStumbler is the most basic site survey option. NetStumbler detects nearby Wi-Fi

networks using your PC’s wireless network card. Wi-Fi networks account for a large

part of the interference in residential installations. NetStumbler, however, cannot

detect RF signals other than Wi-Fi networks – which is a significant limitation. Any

issues that could arise from microwaves, cordless phones, 802.15.4 devices, or baby

monitors will not be noticed if using just this tool.

Sample NetStumbler Wi-Fi Network List

By looking at the list of networks, you can calculate which channels will have the

least amount of interference. As a rule of thumb, any networks with a signal strength

of -60 dB or higher should be avoided. Wi-Fi networks cause interference on the

channels around them as well. In the example above, channel 1 has a very large

amount of interference, channel 11 has some interference, and channel 6 has very

little interference.

NOTE: NetStumbler does not work on Windows Vista™. Instead of NetStumbler,

you can use a free program called Inssider available at the MetaGeek website

(http://www.metageek.net/products/inssider).

AirMagnet

AirMagnet is a high-end professional site survey tool often used by corporate IT

departments. AirMagnet has all of the features of Wi-Spy, plus the ability to detect

the type of transmitting equipment. AirMagnet can also look at the 5.8 GHz band

and the 2.4 GHz band if your laptop card has an 802.11a component.

Reference Guide – DOC. 6689C Best Practices – RF Products • 7

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Crestron CNRFGWX Spezifikationen Seite 11