User's Guide Part 2

User Guide: PTP 600 Series Configuring the PTP 600
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
6-27
Spectrum management configuration
The following section describes the user modifiable configuration accessible from the
Spectrum Management webpage (Figure 6-9). It is re
commended that the default
values are maintained. If the user believes that the performance of the Spectrum
Management algorithm requires some modifications this should only be done after
consulting the Motorola Point-to-Point distributor or one of the system field support
engineers.
The Spectrum Management page contains the following fields:
Page Refresh Period
The page refreshes automatically according to the setting entered here (in seconds).
Hopping Margin
Spectrum Management uses this margin when making a channel hop decision. If the
interference level of the target channel is lower than that of the active channel by at
least the Hopping Margin, the link will hop to the target channel. The default setting is
3 dB in non-radar regions, or 10 dB in radar regions.
Asymmetric DFS
Only displayed in non-radar regions when i-DFS is enabled. The default configuration
of symmetric operation constrains the link to operate symmetrically, using the same
transmit and receive channels. When in symmetric mode the slave unit will always
follow the master. If the master moves to a new channel the slave will hop to the same
channel. When the Point-to-Point link is configured as an asymmetric link both the
master and slave are free to select the best channel from their own set of local
interference metrics.
Spectrum Management Control
Only displayed in radar regions. The options are “DFS” and “DFS with i-DFS”
Hopping Period (not configurable)
The Spectrum Management algorithm evaluates the metrics every ‘Hopping Period’
seconds (180 seconds by default) looking for a channel with lower levels of
interference. If a better channel is located, Spectrum Management performs an
automated channel hop. If SNMP or SMTP alerts are enabled an SNMP TRAP or an
email alert is sent warning the system administrator of the channel change.