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PMP 400/430 and PTP 200/230 Series
4.4
DFS AND REGULATORY PARAMETERS FOR 5.8 & 5.4 GHZ RADIOS
Dynamic Frequency Selection (DFS) is a requirement in several countries and regions for 5 GHz
unlicensed systems to detect radar systems and avoid co-channel operation. DFS and other
regulatory requirements drive the settings for the following parameters, as discussed in this
section:
Region Code
Primary Frequency
Alternate 1 and Alternate 2 Frequencies
External Antenna Gain
On the AP/BHM, the "Home => DFS Status" page shows current DFS status of all three
frequencies and a DFS log of past DFS events. Unlike standard Canopy, the PMP 400/430 and
PTP 200/230 Series AP, SM, and BH do not offer "Whitening", as the OFDM technology obviates
the need for it.
Figure 27: DFS Status on AP "Home => DFS Status" page.
4.4.1
Background and Operation
The modules use region-specific DFS based on the "Region Code" selected on the module's
"Configuration => General" page. By directing installers and technicians to set the Region Code
correctly, the operator gains confidence the module is operating according to national or regional
regulations without having to deal with the details for each region.
Available "Region Codes" include Other, United States, Canada, Europe, Brazil, India, Russia,
Indonesia and Australia. Operators in regions or countries not listed and with requirements
aligned with one of the listed countries should set the Region Code to that country. Operators in
regions or countries with no requirements for DFS should use the "Other" Region Code.
New APs and BHMs from the factory will show a Region Code of "None", and will not transmit
until the Region Code is set to a value other than "None".
Canada, United States and Europe have requirements to avoid certain 5.4-GHz frequencies used
by some weather radar. To meet this requirement, modules set to a Region Code of Canada,
United States or Europe will display the center channel frequencies shown in
on the AP's and BHM's Carrier Frequency pop-up and on the SM's and BHS's Frequency
35
Scan Selection List.
Issue 6.0 May 2011
Motorola PMP Solutions User Guide Supplement
Table 10
on page
Page 46 of 77
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