User's Manual
AP_CMM2 User Manual Issue 4 Draft Pa
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CHANNEL PLANS
Whether using 2.4, 5.2, or 5.7 GHz modules, frequencies should never be placed closer
than 20 MHz. 5.2 and 5.7 GHz modules allow the operator to chose frequencies every 5
MHz. 2.4 GHz modules allow the operator to chose frequencies every 2.5 MHz. This is
so that in the event of co-location with other equipment the operator can customize the
channel layout for interoperability.
Backhauls and APs operating in the same frequency band (within the 2.4 GHz band, within the 5.2
GHz band, or within the 5.7 GHz band) need 100 feet (30 m) of physical separation, as their
different transmit and receive frame structures otherwise would cause interference.
2.4 GHz Recommended Frequencies
The following are the 3 non-overlapping channels that are recommended by the Canopy team for
use with an Access Point cluster:
• 2.415 GHz
• 2.435 GHz
• 2.4575 GHz
Note this gives 20 MHz of separation between one pair of channels, and 22.5 MHz of separation
between the other pair. Depending on the RF environment you are operating in, you may want to
put the middle channel at 2.4375 GHz and give additional separation between it and the 2.435 GHz
channel, or move the top channel down to 2.455, or the bottom channel up to 2.4175, as long as
you maintain at least 20 MHz of separation between channels. You can use the Spectrum Analysis
feature in an SM or BHS, or a standalone spectrum analyzer, to help evaluate the RF environment
and guide you in site-specific frequency engineering.
5.2 GHz Recommended Frequencies
The following are the 3 non-overlapping channels that are recommended by the Canopy team for
use with an Access Point cluster:
• 5.275 GHz
• 5.300 GHz
• 5.325 GHz
5.7 GHz Recommended Frequencies
The following are the 6 non-overlapping channels that are recommended for use in an Access
Point cluster when the ISM frequencies are available.
Note: only 3 channels are actually needed
for the fully populated cluster. Any of the six channels can also used for backhaul point-to-point
links
:
• 5.735 GHz
• 5.755 GHz
• 5.775 GHz
• 5.795 GHz
• 5.815 GHz
• 5.835 GHz
Canopy 5.7 GHz modules can operate up to 5.840 GHz. If your frequency engineering plan allows,
consider using the additional 5 MHz of separation between your AP frequencies and your backhaul
frequencies.