User guide

45 Mbps Backhaul User Guide
Issue 3, December 2004 Page 60 of 113
Green
Active
The channel is currently in use hosting the
Point-to-Point wireless link
Orange
Interference
The channel has interference above the interference
threshold
Blue
Available
The channel has an interference level below the
interference threshold and is considered by the
Spectrum Management algorithm suitable for
hosting the Point-to-Point link
Grey
Barred
The system administrator has barred this channel
from use. Because the low signal levels
encountered when a unit is powered up in a
laboratory environment prior to installation (which
makes the grey of the channel bar difficult to see).
An additional red ‘lock’ symbol is used to indicate
that a channel is barred.
Table 5 Spectrum Management (Non UK) change state key
The top of the colored bar represents the 99.9% percentile metric for specific channel.
The ‘I’ Bar is used to display the mean of means and peak of means metrics. The lower horizontal bar
represents the mean of means and the upper horizontal bar represents the peak of means. The vertical bar is used
as a visual cue to highlight the statistical spread between the peak and the mean of the statistical distribution.
The peak symbol (the upper small triangle above each channel ‘I’ bar) is used to indicate the peak of peaks
interference measurement.
6.3.5.8 Active Channel History
The active channel history is a timeseries display of the channels used by the 45 Mbps Backhaul over the last 25
hours. The active channel history is activated from the main Spectrum Management page using the ‘Active
Channel History’ hyperlink. An example of the active channel history display is shown in Error! Reference
source not found.. Where there are parallel entries on the display this signifies that the wireless link occupied
this channel during the measurement period. The measurement periods are one minute form zero to sixty
minutes and twenty minutes from 60 minutes to twenty five hours.
Figure 29: Active Channel History Screen