Web Page Reference
99
•
Peak of Means
•
99.9% Percentile of the Means
•
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.
Important 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.
All configuration changes are applied at the master only. These changes are then messaged from
the master to the slave. Any Spectrum Management configuration messages received at the slave
are stored in non-volatile memory. This enables both master and slave to keep identical copies of
Spectrum Management configuration data in their non-volatile memories. It is therefore possible
to swap master and slave roles on an active Point-to-Point link without modifying Spectrum
Management configuration.
The arithmetic mean is the true power mean and not the mean of the values expressed in dBm.
Содержание MOTOWI 4
Страница 1: ...PTP 500 Series User Guide phn 1115 000v001 ...
Страница 74: ...Web Page Reference 74 Figure 37 Save Configuration File Screen ...
Страница 100: ...Web Page Reference 100 Figure 59 Spectrum Management as seen from the Master ...
Страница 108: ...Web Page Reference 108 Figure 66 Spectrum Management Master Screen With Operational Restrictions ...
Страница 112: ...Web Page Reference 112 Figure 68 Remote Management ...
Страница 165: ...Data Rate Calculations 165 Figure 112 QPSK 0 50 Single Payload Figure 113 QPSK 0 75 Single Payload ...
Страница 166: ...Data Rate Calculations 166 Figure 114 16 QAM 0 50 Single Payload Figure 115 16 QAM 0 75 Single Payload ...
Страница 167: ...Data Rate Calculations 167 Figure 116 64 QAM 0 67 Single Payload Figure 117 64 QAM 0 83 Single Payload ...
Страница 168: ...Data Rate Calculations 168 Figure 118 256 QAM 0 75 Single Payload Figure 119 QPSK 0 50 Dual Payload ...
Страница 169: ...Data Rate Calculations 169 Figure 120 QPSK 0 75 Dual Payload Figure 121 16 QAM 0 50 Dual Payload ...
Страница 170: ...Data Rate Calculations 170 Figure 122 16 QAM 0 75 Dual Payload Figure 123 64 QAM 0 67 Dual Payload ...
Страница 171: ...Data Rate Calculations 171 Figure 124 64 QAM 0 83 Dual Payload Figure 125 256 QAM 0 75 Dual Payload ...
Страница 197: ...Glossary 197 UTP Unshielded Twisted Pair VLAN Virtual Local Area Network ...
