Use the Scan Mode control to choose the channels to monitor for rogue devices. AirDefense provides a set of preconfigured list of channels to scan.
The following pre-configured scan modes are available for use:
Default Scan - This is list of channels that are scanned by default. This list consists of all the standard channels in both the 2.4 GHz and 5.0 GHz bands. This list cannot be edited.
Extended Channel Scan - This list consists of all the standard channels in the 2.4 GHz and 5.0 GHz bands and also includes the extended channels in these bands. This list cannot be edited.
Extended and Emergency Channel Scan - This list consists of all standard, extended, and emergency channels in both the 2.4 GHz and 5.0 GHz bands. This is most comprehensive of all the pre-configured scans. This list cannot be edited.
Custom Scan - This list consists of all standard, extended, and emergency channels in both the 2.4 GHz and 5.0 GHz bands. This list allows you to select those channels that you wish to scan.
Channel Lock - This list enables you to select a particular channel to scan. When selected, the scan is locked to the selected channel.
To set your Scan Mode configuration:
This control displays the following additional information for your Scan Mode selection.
| Field | Description |
|---|---|
| Channel Range Bar |
The channel range bar control enables you to narrow down the range of channels to those channels you are interested in.  Use the small rectangular handles at the vertical edges of the bar to narrow down your selection of channels. The number of records shown in the Records control changes to reflect the number of channels that you have selected. The Range control changes to show the radio frequency range of the channels that you have selected.  You can also click and drag the yellow bar to slide the bar within the control. Sliding the bar selects the appropriate channels within the bar's coverage. To reset your channel selection, click the small x located to the right of the Range control. This resets your channel selection immediately. |
| Records | This control displays the number of records displayed for your current scan mode selection and the number of channels that have been selected based on your filter. |
| Channel List |
This field displays the channels for your current Scan Mode and the filter (if any) that you have applied to narrow down your channel selection.  The fields in this control are not editable. |
The following fields become available for further configuration.
| Field | Description |
|---|---|
| Channel |
This field displays the channel's number and its frequency. This field cannot be changed. |
| Bandwidth | Use the drop-down list to select the channel's bandwidth. The available bandwidths depend on the channel's frequency. |
| Scan Weight |
This field indicates the number of times the channel is scanned in a scan cycle. A scan cycle is considered complete when each channel in the scan mode is scanned at least once. Note:
By default, each channel is scanned
for 1 second in each cycle.
When this value is set to 1 or more, it indicates the number of times the channel is scanned in a scan cycle. A scan weight of 1 specifies that the selected channel will be scanned once during each scan rotation. A scan weight of 2 specifies that the selected channel will be scanned twice and so forth. The scan sequence is determined by the specified scan weights. All selected channels are initially scanned once during the scan rotation. Any selected channels that have weights of 2 or more are then scanned again at the end of each rotation period for the number of times specified by the weight value. For example, if channels 1, 6, and 11 are assigned scan weights of 1, 2, and 2, the channel scan sequence is 1-6-11-6-11. Another example is: if channels 1, 5, 6, and 11 are assigned scan weights of 2, 1, 3, and 3, then the channel scan sequence is 1-5-6-11-1-6-11-6-11. When this value is set to a value that is < 1, it indicates that the channel must be scanned for the set fraction of a second. |
By default, all channels are selected for scanning. You can use the check box next to the Channel control to select or unselect all the channels listed in this control. Use the check box next to each channel in this list to either scan or prevent this channel from being scanned in each scan cycle.
Note
You can only select one channel at a time for this scan mode.Use the option control next to the channel's name to lock the channel scan to that particular channel. You cannot select multiple channels for this scan mode. The Width and Weight parameters cannot be modified.