136
Mean of Means
is the arithmetic mean
21F
22
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
By default 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.
22
The arithmetic mean is the true power mean and not the mean of the values expressed in dBm.
Содержание MOTOWI 4 PTP 600 Series
Страница 1: ...PTP 600 Series User Guide MOTOROLA POINT TO POINT WIRELESS SOLUTIONS ...
Страница 2: ......
Страница 24: ...22 List of Equations 462HEquation 1 Path Loss 955H63 463HEquation 2 Link Loss 956H91 ...
Страница 113: ...111 8 3 3 Detailed Counters Page Figure 53 Detailed Counters Page ...
Страница 139: ...137 Figure 75 Spectrum Management as seen from the Master Figure 76 Spectrum Management as seen from the Slave ...
Страница 183: ...181 Figure 114 Surge Arrestor ALPU ORT Connection Illustration Note Cable screens have been sleeved ...
Страница 220: ...218 14 3 2 2 Confirm Settings and Reboot ODU Figure 135 Confirm TDD Synchronization Configuration Parameters ...
Страница 221: ...219 Figure 136 Disarm Following TDD Synchronization ...
Страница 227: ...225 Figure 142 Diagrammatically Showing the E1 T1 Connections ...
Страница 228: ...226 Figure 143 Two E1 T1 120 Ohms signal Balanced to PTP600 Interface ...
Страница 230: ...228 Figure 144 Typical Mast Installation with the addition of the E1 T1 cable ...
Страница 233: ...231 Figure 146 Surge Arrestor ALPU ORT Connection Illustration ...
Страница 237: ...235 Figure 149 QPSK 0 63 Single Payload Figure 150 QPSK 0 87 Single Payload ...
Страница 238: ...236 Figure 151 16 QAM 0 63 Single Payload Figure 152 16 QAM 0 87 Single Payload ...
Страница 239: ...237 Figure 153 64 QAM 0 75 Single Payload Figure 154 64 QAM 0 92 Single Payload ...
Страница 240: ...238 Figure 155 256 QAM 0 81 Single Payload Figure 156 16 QAM 0 63 Dual Payload ...
Страница 241: ...239 Figure 157 16 QAM 0 87 Dual Payload Figure 158 64 QAM 0 75 Dual Payload ...
Страница 242: ...240 Figure 159 64 QAM 0 92 Dual Payload Figure 160 256 QAM 0 81 Dual Payload ...
