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Chapter 7: Operation
Note
Before attempting to improve the performance of the spectrum management
algorithm by changing the default configuration, consult the Cambium Point-to-Point
distributor or one of the system field support engineers.
Procedure:
•
Review the configuration attributes
•
Update the attributes as required. At the slave unit, only Page Refresh Period can be updated.
•
To save changes, click Submit configuration changes.
Table 104 Spectrum Management attributes
Attribute
Page Refresh Period
Hopping Margin
Asymmetric DSO
Spectrum
Management
Control
Hopping Period (not
configurable)
Hopping Counter
(Table
104)
Meaning
The page refreshes automatically according to the setting entered here
(in seconds).
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.
Only displayed in non-radar regions when DSO 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.
Only displayed in radar regions. The options are DFS and DFS with DSO.
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.
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.
Page
7-22
Spectrum management
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