Spectrum Management Configuration - Motorola PTP 300 Series User Manual

7.9.5 Spectrum Management Configuration

The following section describes the user modifiable configuration accessible from the
Spectrum Management webpage (Figure 71). It is recommended 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.
Hopping Counter
This is used to record the number of channel hops. The number in the "(+)" brackets
indicates the number of channel changes since the last screen refresh.
Interference Threshold
Spectrum Management uses the interference threshold to perform instantaneous channel
hops. If the measured interference on a channel exceeds the specified threshold, then i-DFS
will instruct the wireless to immediately move to a better channel. If a better channel cannot
be found the PTP 300 Series Bridge will continue to use the current active channel. (Default –
85 dBm).
Channel Bandwidth (not configurable)
This shows the value of the variable channel bandwidth selected.
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