Motorola 5440AP - Canopy 5.4 GHz AP User Manual Supplement page 23

Canopy 400 Series OFDM AP and SM
The AP always operates under its manually configured Region Code (the one on the
Configuration => General page), and so does not show a Region Code on its Home => General
Status page.
Under normal operations, APs operating with DFS (see Table 4) will experience an additional
minute after power-up or reboot before they will register any SMs. SMs operating with DFS (see
Table 4) will experience an additional minute after they reboot before they will register to an AP.
It takes two reboots to set the parameters described below on a module starting from factory
defaults. Set the Region Code as described above, "Save Changes", and "Reboot". If the module
then invokes DFS (based on the Region Code and frequency band as shown in Table 4), the
Radio Frequency Carriers and External Antenna Gain parameters will be displayed. Set them as
described below, "Save Changes", and "Reboot" again.
IMPORTANT!
Set the Region Code, "Save Changes", and "Reboot" to see the context-
sensitive DFS parameters. Unlike with many context-sensitive
parameters, these do not appear in the GUI with only a "Save Changes".
Setting Radio Frequencies
APs running DFS include an option for setting up to two alternate frequencies on the
"Configuration => Radio" page, in addition to the primary frequency, as shown in Figure 8. These
alternate frequencies are used in the unlikely event radar is detected and the main frequency is
locked out due to DFS detection. If these are left at "None", no backup frequencies will be used in
the case of DFS detection, and the AP will lock itself out from any transmission for 30 minutes.
If radar is detected on the main frequency, either at startup or during operation, a Channel
Availability Check will be performed on the 1
transmission. If radar is detected on the 1
Check or during operation, a Channel Availability Check will be performed on the 2nd alternate
frequency before it is then used for transmission. If radar is detected on the 2nd alternate
frequency, either during Channel Availability Check or during operation, the radio will cease
transmission unless or until the primary channel clears its 30 minute lock-out.
The alternate frequencies configured in the AP must be included in the SM's Frequency Scan
List, or the SMs can't follow their AP if it switches to a new channel. Additional frequencies may
checked in the Frequency Scan List depending on local practices, for example if an operator
wants to configure an SM to only register on certain frequencies to drive a known SM to AP
mapping, or configure an SM to register on many frequencies so that it may find another AP to
register to if its usual AP isn't available.
Note, use site surveys and RF planning to choose alternate frequencies useful for each sector,
and consider testing on the alternate frequencies to ensure compatibility with the sector's RF
environment.
Version 1, April 2008
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alternate frequency before it is then used for
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alternate frequency, either during Channel Availability
User Guide
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