Dell PowerConnect W-Airwave User Manual page 14

To tune the wall settings within the VisualRF UI navigate to the Wall Attenuation Settings section.
When tuning the VisualRF server be sure to utilize the default settings as recommend below. If you do
change any of these setting above, change one at a time and see how the system performs. Each time
you restart the VisualRF service it will take at least 30 minutes to return to normal processing.
Setting
Glass
Attenuation (dB)
Cubicle Attenuation (dB)
Drywall Attenuation (dB)
Concrete Attenuation (dB)
If you use 'top' command to check on VisualRF resource utilization ensure you use the '1' and 'H' flags
to show cores and threads. Remember 'top' also takes 1-2 minutes to normalize and provide accurate
data.
It is normal for VisualRF to consume 20% of each core with a combination of threads. It will utilize
excess CPU cycles on all cores when required.
Figure 4. "Example top Output"
Figure 5. "Example Threading"
14
Default
2 Specifies the attenuation for any glass walls that are drawn in VisualRF.
Note: All of these values are global variables that can't be overridden for
individual floor plans. These values are utilized by the VisualRF service to
calculate path loss and client locations. Walls within VisualRF are
interpreted as pure dB loss without adjusting for wall thickness.
4 Specifies the attenuation for any cubicle walls that are drawn in VisualRF.
6 Specifies the attenuation for any drywall walls that are drawn in VisualRF.
15 Specifies the attenuation for any concrete walls that are drawn in VisualRF.
Description
Visual RF an d Visual RF Plan | User Guide