Motorola PTP 400 Series - Manual (Page 121)

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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.
8.3.8.8 Active Channel History
The active channel history is a time series display of the channels used by the PTP 400
Series Bridge 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 Figure 59. 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 from zero to sixty minutes and twenty
minutes from 60 minutes to twenty five hours.
Figure 59 - Active Channel History Screen