Cambium PTP 670 Series, Руководство пользователя

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Chapter 7: Operation Spectrum Management
Page 7-38
Channel states
The active channel (Channel 9 in Figure 219 ) is always marked using hatched green and white
lines on the Spectrum Management page or solid green on the Spectrum Expert page. The
width of the hatching is directly proportional the channel bandwidth or spectral occupancy of
the channel.
The individual channel metrics are displayed using a colored bar and an “I” bar. The colored
bar represents the channel state (
Table 211 ).
Table 211 Channel states represented in the Spectrum Expert plot
Color State Meaning
Green Active The channel is currently in use, hosting the 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.
Light Grey Barred
The system administrator has barred this channel from use.
For improved visibility, an additional red “lock” symbol is
used to indicate that a channel is barred but The lock is not
shown in Extended view.
Red Radar
Detected A radar signal has been detected and operation on this
channel is currently not allowed.
Dark Grey Region
Barred Extended scanned channels outside the range of configured
operational subband channels
Key metrics
The “I” bar and top of the colored bar represent three key metrics ( Table 212 ). The vertical part
of the “I” bar represents the statistical spread between the peak and the mean of the statistical
distribution.
The arithmetic mean is the true power mean and not the mean of the values expressed in dBm.
Spectrum Management uses the 99.9% Percentile as the prime interference measurement. All
subsequent references to interference level refer to this percentile measurement.
Table 212 Key metrics represented in the Spectrum Expert plot
Metric Description How represented
Peak of Means The largest mean interference measurement
encountered during the quantization period. The
peak of means is useful for detecting slightly
longer duration spikes in the interference
environment. Upper horizontal
bar.