User guide

Canopy System User Guide Considering Frequency Band Alternatives
pmp-0229 (Mar 2013)
139
5.4-GHz OFDM AP Cluster Recommended Channels
No guard band is required between 10-MHz channels. However, to use the 3X operation feature of
these OFDM modules, you should separate the channels of clustered APs by at least 10 MHz. The
fully populated cluster may be configured for two channels—each reused by the module that is
mounted 180° opposed—or four channels.
Channels are preconfigured to help in your decision on the two or four to use in a four-AP cluster.
These modules do not include a spectrum analyzer for you to read the strength of neighboring
frequencies. The ranges of available center channels for clustered APs are those shown in Table 33
above.
However, where 5.4-GHz OFDM APs are co-located with 5.4-GHz FSK APs, you should allow
25 MHz channel center spacing to prevent either of the sectors from experiencing interference
from the other.
5.7-GHz Channels
Channel selections for the AP in the 5.7-GHz frequency band range depend on whether the AP is
deployed in cluster.
5.7-GHz BH and Single AP Available Channels
A BH or a single 5.7-GHz AP enabled for frequencies can operate in the following channels,
which are separated by 5-MHz increments.
(All Frequencies in GHz)
5.735 5.765 5.795 5.825
5.740
5.770
5.800
5.830
5.745
5.775
5.805
5.835
5.750
5.780
5.810
5.840
5.755
5.785
5.815
5.760
5.790
5.820
The 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.
5.7-GHz AP Cluster Recommended Channels
Six non-overlapping channels are recommended for use in 5.7-GHz AP clusters:
(All Frequencies in GHz)
5.735
5.775
5.815
5.755
5.795
5.835
The fully populated cluster requires only three channels, each reused by the module that is
mounted 180° offset. The six channels above are also used for backhaul point-to-point links.