User guide

Considering Frequency Band Alternatives Engineering Your RF Communications
136
pmp-0229 (Mar 2013)
2.4-GHz AP Cluster Recommended Channels
Three non-overlapping channels are recommended for use in a 2.4-GHz AP cluster:
(All Frequencies in GHz)
2.4150
2.4350
2.4575
This recommendation allows 20 MHz of separation between one pair of channels and 22.5 MHz
between the other pair. You can use the Spectrum Analysis feature in an SM or BHS, or use a
standalone spectrum analyzer, to evaluate the RF environment. Where spectrum analysis identifies
risk of interference for any of these channels, you can compromise this recommendation as
follows:
• Select 2.4375 GHz for the middle channel
• Select 2.455 GHz for the top channel
• Select 2.4175 GHz for the bottom channel
In any case, ensure that your plan allows at least 20 MHz of separation between channels.
4.9-GHz OFDM Channels
Channel selections for the OFDM AP in the 4.9-GHz frequency band range are 4.945 through
4.985 GHz on 5-MHz centers, with not more than five non-overlapping channels.
5.2-GHz Channels
Channel selections for the AP in the 5.2-GHz frequency band range depend on whether the AP is
deployed in cluster.
5.2-GHz BH and Single AP Available Channels
A BH or a single 5.2-GHz AP can operate in the following channels, which are separated by 5-
MHz increments.
(All Frequencies in GHz)
5.275
5.290
5.305
5.320
5.280
5.295
5.310
5.325
5.285
5.300
5.315
The center channels of adjacent APs should be separated by at least 20 MHz. However,
25 MHz of separation is advised, especially for CAP 130s to take advantage of 2X operation.