Specifications

RF Products Crestron Best Practices

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Best Practices – RF Products Reference Guide – DOC. 6689E

In the channel map example, wireless networks, shown in italics on the channel map

worksheet, are entered as follows:

1. Too much interference exists on Wi-Fi channel 1 and on 802.15.4 channels

11–14; therefore, those channels are eliminated.

2. Wi-Fi channel 6 is the channel that is most free from interference; therefore,

a TPMC-8X-GA network uses that channel. 802.15.4 channels 16–19 are

then unavailable to any other devices.

3. Channel 11 is the only free Wi-Fi channel remaining for a personal

computer Wi-Fi network. 802.15.4 channels 21–24 are then unavailable to

any other devices.

4. There are no more free Wi-Fi channels remaining for devices that

communicate in the 802.11 network; therefore, 802.11a (5.8 GHz) channels

are selected for any remaining Wi-Fi devices.

5. 802.15.4 channel 20 is free; therefore, the TST-600 network is set to that

channel.

6. 802.15.4 channel 15 is free; therefore, the MLX-3 network is set to that

channel.

7. 802.15.4 channels 25 and 26 are free; therefore, the Lighting network is set

to channel 26. Channel 26 is the channel most removed from Wi-Fi

networks and therefore should be the least susceptible to interference from

Wi-Fi networks. Channel 26, however, also has the shortest range in most

Crestron products and therefore may be less reliable than other channels.

Careful examination of the site survey is necessary to determine the most

appropriate channel assignment.

As a result of careful testing and planning, each network is positioned so that it does

not interfere with the other networks or receive large amounts of outside

interference.

Large RF Network Installations

If a large number of RF networks are being installed in a single installation, it may

not be possible to give each network its own channel. In large environments,

networks can be placed on the same channels as long as devices are far enough apart

to ensure that the RF signals do not overlap for similar channels. The following

illustration shows how Wi-Fi 802.11b/g networks can be spaced by channel so that

they do not interfere with each other (as viewed from overhead).