3Com 3CRWXR10095A, 3CRWX120695A WXR100 manual Specifying the RF Characteristics of a Floor

Specifying the RF Characteristics of a Floor 99

To use this method, perform the following tasks:

1In 3WXM, identify the major RF obstacles and assign an attenuation value to them. You can select any attenuation value. 3WXM will use the RF measurement data from the site survey to correct the attenuation values. (See “Converting Objects into RF Obstacles” on page 95 and “Drawing RF Obstacles” on page 97.)

3WXM also can create new obstacles based on the RF measurement data. But adding major obstacles before you import the survey results helps 3WXM provide a more complete set of RF obstacles.

2In 3WXM, indicate the positions where you will place the portable AP. These positions are line of sight (LOS) points. You can create the LOS points in 3WXM or import them from a comma separated values (CSV) file. In either case, you must assign a unique MAC address to each LOS. Even though each LOS will use the same portable AP, each position where you use the AP must have a unique MAC address. (See “Adding LOS Points” on page 100.)

You can place the LOS points at the places where you are thinking of installing the permanent MAPs, but this is not a requirement.

3In 3WXM, generate a site survey order. The site survey order includes the locations and MAC addresses of the LOS points, and also provides a GIF image of the floor. (See “Generating a Site Survey Order” on page 106.)

4In the site survey tool, import the GIF of the floor plan and use the map name specified in the site survey work order.

5Place the portable AP at the first LOS position and assign it the MAC address specified in the work order. Start the site survey tool on the laptop PC and take the measurements. (See the Ekahau site survey documentation for specific instructions.)

6In 3WXM, import the RF measurements from the site survey file. (See “Importing RF Measurements” on page 108.)

7In 3WXM, build the attenuation library. This task updates the attenuation of RF obstacles that are already in the plan. In addition, this step adds any new obstacles detected during the survey. (See “Applying the RF Measurements to the Floor Plan” on page 110.)

8In 3WXM, define wireless coverage areas. (See “Defining Wireless Coverage Areas” on page 110.)