The Spectrum Management Master / Slave Relationship - Motorola PTP 600 Series User Manual

The analysis produces three key metrics for each channel:
x
Peak of Means
x
99.9% Percentile of the Means
x
Mean of Means
Peak of Means is the largest mean interference measurement encountered during the
quantization period. The peak of means is similar to the peak of peaks and is useful for
detecting slightly longer duration spikes in the interference environment.
99.9% Percentile of the Means is the value of mean interference measurement which 99.9%
of all mean measurements fall below, during the quantization period. The 99.9% percentile
metric is useful for detecting short duration repetitive interference that by its very nature has a
minimal effect of the mean of means.
Mean of Means is the arithmetic mean of the measured means during a quantization period.
The mean of means is a coarse measure of signal interference and gives an indication of the
average interference level measured during the quantization period. The metric is not very
good at predicting intermittent interference and is included to show the spread between the
mean of means, the 99.9% percentile and the peak of means.
NOTE: The arithmetic mean is the true power mean and not the mean of the values
expressed in dBm.
NOTE: Spectrum Management uses the 99.9% percentile as the prime interference
measurement. All subsequent references to interference level refer to this percentile
measurement.
The display of statistical measurement on the spectrum management page always shows a
statistical summary of all channel measurement. The statistical summary is controlled by the
Statistics Window attribute. This attribute defaults to a value of twenty minutes, which means
that the mean and percentile values displayed for each channel are calculated over the 20
minute period. All channel decisions are made using the values computed over the statistics
window period.
8.3.7.4

The Spectrum Management Master / Slave Relationship

The Spectrum Management operates in a master / slave relationship. The master is assumed
to be the link master configured during installation. All Spectrum Management configuration
changes MUST be performed from the master. To enforce this, the Spectrum Management
web page has a different appearance depending if you are viewing the data from the master
or slave.
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8 Web Page Reference