PMP 400/430 and PTP 200/230 Series
Motorola PMP Solutions User Guide Supplement
Issue 6.0 May 2011
Page 48 of 77
radar signature it marks the current carrier frequency for a 30 minute non-occupancy period and
moves to check the next-in-line carrier frequency.
An SM/BHS does not begin transmission until it detects a beacon from an AP/BHM. If APs/BHMs
are not transmitting, SMs/BHSs will be silent.
The FCC and IC require DFS only on APs/BHMs. Europe applies the ETSI specification to both
APs/BHMs and SMs/BHSs, while Brazil applies it only to AP/BHMs. In the ETSI case, when an
SM/BHS boots, it scans to find a Canopy beacon from a AP/BHM. If an AP/BHM is found, the
SM/BHS performs a channel availability check on that frequency for 1 minute, monitoring for the
radar signature, without transmitting. A DFS decision is made based on the following:
If no radar pulse is detected during this 1 minute, the SM/BHS proceeds through normal
steps to register to an AP/BHM.
If the SM/BHS does detect radar, it locks out that frequency for 30 minutes and continues
scanning other frequencies in its scan list.
Note, after an SM with DFS has seen a radar signature on a frequency and locked out that
frequency, it may connect to a different AP if color codes, AP transmitting frequencies, and SM
scanned frequencies support that connection.
BHSs would not be expected to connect to a different BHM, as backhaul links should be
configured using color codes and authentication to ensure a BHS only connects with its intended
BHM.
To simplify operation and ensure compliance, an SM/BHS takes on the DFS type of the AP/BHM
to which it registers. For example, when an SM in Europe registers to an AP with the Region
Code s
et to “Europe”, that SM will use ETSI DFS, no matter what its Region Code is set to, even
if its Region Code is set to “None”. Note, the operator should still configure the Region Code in
the SM correctly, as future releases may use the Region Code for additional region-specific
options.
For all modules running DFS, the module displays its DFS state on its Home => General Status
page as one of the following:
Checking Channel Availability Remaining time
n
seconds
, where
n counts down from 60 to 1.
Normal Transmit
Radar Detected Stop Transmitting for
n
minutes
, where n counts
down from 30 to 1.
Idle,
only for SM/BHS, indicates module is scanning, but has not detected a
beacon from an AP/BHM. Once it detects beacon, the SM/BHS begins a Channel
Availability Check on that frequency.
4.4.2
Setting DFS and Regulatory Parameters
Setting the Region Code
All modules display a Region Code pop-up on the Configuration => General page as shown in
Figure 28
on page
50
.
On new modules from the factory, or after resetting to factory defaults, the operator should set
this Region Code consistent with their country or region. For countries or regions not listed in the
Region Code pop-up, set the Region Code consi
stent with your country’s regulatory
