User guide

Analyzing the RF Environment Engineering Your RF Communications
130
pmp-0229 (Mar 2013)
Release 9 introduces support for Dynamic Frequency Selection (DFS) ETSI v1.4.1.
A 5.2-, 5.4-, or 5.7-GHz P10 or higher AP or BH with a Region Code set to United States and
upgraded to Release 9.5 will continue to be set to the United States Region Code and will not be
configurable to another Region Code by installers or end users. As discussed in section 2.3, this is
in response to FCC KDB 594280 and ensures that end users and professional installers will not
have access to settings which could allow a radio to be configured to operate in a manner other
than that which was specified in the FCC equipment authorization grant. After upgrade, the AP or
BH will display the Region Code on the Configuration => General page as United States in a gray
font, and the parameter is no longer settable.
To prevent co-channel operation with Terminal Doppler Weather Radar (TDWR) systems, P10
and P11 5.4-GHz APs and BHMs configured with a Region Code of United States running
Release 9.5 or later will not use or allow configuration of the center channel frequencies shown in
Table 30.
Table 30: United States Region Code – unavailble center channels
Product Family Center Channel Frequencies not Available
FSK – 5.4 GHz
5590 through 5660 MHz (on 5-MHz
increments) not available
OFDM – 5.4 GHz
5600 through 5650 MHz (on 5-MHz
increments) not available
This applies to the Radio Frequency Carrier as well as Alternate Frequency Carrier 1 and
Alternate Frequency Carrier 2 on an AP’s or BHMs Configuration => Radio page. Avoiding
the TDWR band addresses FCC concerns about possible interference caused by Part 15 devices.