Black Box LWN600CM-1 Podręcznik Użytkownika Pobierz pdf (Strona 24)

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Chapter 2: Preparing for a WAN Deployment

The number of SmartPath APs that can perform a spectral scan concurrently varies depending on the SmartPath EMS VMA

platform you use. SmartPath EMS VMA Virtual Appliance limits the number of concurrent scans to two (that is, only two

SmartPath APs can perform spectrum analysis functions as the same time); the physical SmartPath EMS VMA permits up to 20

concurrent scans.

To start the spectrum analyzer feature:

1. Click Monitor > Access Points > SmartPath APs, select the SmartPath AP on which you want to start the spectrum analyzer

feature, and then click Tools > Spectrum Analysis.

A message appears with a warning that performing spectrum analysis on the selected SmartPath AP will affect performance and

prompts you to confirm your decision. As a general rule, try to use this tool on SmartPath AP portals that are not actively serving

clients rather than on mesh points with which clients are currently associated.

2. If you want to continue, click “Yes.”

SmartPath EMS VMA immediately initiates the analysis tool on the selected SmartPath AP and displays the analysis pane, which

contains three main areas: a status bar at the top of the pane, an area containing the graphical analysis feedback, and an

interference reporting area at the bottom of the pane.

NOTE: To use the spectrum analysis feature on a radio in access mode, you must have at least one SSID configured on your

WLAN on at least one SmartPath AP running SmartPath OS 4.0r1.

Status Bar

The status bar contains a brief overview of the current analysis parameters, including which SmartPath AP is employed, the

frequency band and channels, and the time remaining in the analysis. In addition to the parametric information, four navigation

buttons are also displayed.

Figure 2-8. Status bar.

Settings: Click to open a dialog box in which you can change the parameters of the spectrum analysis. Modify the following

settings, and then click “Update:”

Interface: Choose which interface you want to use to collect data by the band with which it is associated. If you choose 2.4 GHz

(11n/b/g), then the SmartPath AP uses its wifi0 interface to monitor the 2.4-GHz band. If you choose 5 GHz (11n/a), then it uses

its wifi1 interface to monitor the 5-GHz band.

2.4-GHz Channels: This field only appears if you choose 2.4 GHz (11n/b/g) from the Interface drop-down list. In this field, you

can enter any combination of channels that occurs in the 2.4-GHz band. If you are entering noncontiguous channels, then sepa-

rate the channel numbers by commas. If you are entering a range of channels, use the hyphen ( - ) to indicate the range. For

example, to monitor Channel 1, 5, and the range 7 through 11, then enter 1, 5, 7-11 into this field. To monitor the entire band,

enter 1-11, or 1-13, or 1-14, depending on the channels allowed for your region.

5.0-GHz Channels: This field only appears if you choose 5 GHz (11n/a) from the Interface drop-down list. In this field you can

enter any combination of channels that occurs in the 5-GHz band. If you are entering noncontiguous channels, then separate the

channel numbers by commas. If you are entering a range of channels, use a hyphen ( - ) to indicate the range. For example, to

monitor Channel 36, 48, and the range 149 through 165, then enter 36, 48, 149-165 into this field. To monitor the entire band,

enter 36-165.

Data Collect Interval: The data collection interval refers to the time interval between scans of the spectrum. Each time the

SmartPath AP scans the spectrum, it updates the display. If the data collection interval is five seconds, then the SmartPath AP

scans every five seconds and updates the display. You can change the interval from 1 to 30 seconds. The default is a one-second

interval.

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