Menus and Parameters

4.2.6.2.4.3.2Frequency 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.

4.2.6.2.4.3.3Channel 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.

4.2.6.2.4.3.4Channel 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.

4.2.6.2.4.3.5SU 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.

4.2.6.2.4.3.6Minimum 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.

Operation and Administration

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Alvarion SW VERSION 5.1 6.2.4.3.2Frequency Subset Definition, 6.2.4.3.3Channel Check Time, 6.2.4.3.5SU Waiting Option