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Menus and Parameters
Operation and Administration
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4.2.6.2.4.3.2 Frequency Subset Definition
The Frequency Subset Definition parameter defines the frequencies that will be
used in the DFS mechanism. The available frequencies according to the Sub-
Band are displayed, and each of the frequencies in the list is associated with an
index. The frequencies subset can be defined by entering the indexes of the
required frequencies, or “A” to select all available frequencies.
The default is the complete list of frequencies available in the Sub-Band.
4.2.6.2.4.3.3 Channel Check Time
The Channel Check Time defines the time allocated for checking whether there is
a radar activity on a new frequency after power up or after attempting to move to
a new frequency upon detecting radar activity on the previously used frequency.
During this time the AU does not transmit.
The range is 1 to 3600 seconds.
The default is 60 seconds.
4.2.6.2.4.3.4 Channel Avoidance Period
The Channel Avoidance Period defines the time that the frequency will remain
marked in the database as Radar Detected or Adjacent to Radar after detecting
radar activity. These frequencies will not be used when searching for a new
frequency. When this time has elapsed, the unit frequency’s marking will change
to Radar Free.
The range is 1 to 60 minutes.
The default is 30 minutes.
4.2.6.2.4.3.5 SU Waiting Option
The SU Waiting Option defines whether the disassociation message sent by the
AU, after detecting radar activity on the current frequency, will include a message
instructing the SU to search only for the AU before attempting to search for
another AU. The message includes also the time period during which the SU
should not search for any other AU. The waiting time is the Channel Check Time
plus 5 seconds.
The default is Enable.
4.2.6.2.4.3.6 Minimum Pulses to Detect
The Minimum Pulses to Detect parameter defines the minimum number of radar
pulses that should be detected before reaching a decision that radar is active on
the channel.
The range is from 1 to 100 pulses.
The default is 4 pulses for FCC Country Codes, 8 for other (ETSI) Country Codes.