Agilent Technologies 37907A Manual do Utilizador descarregar pdf (Página 26)

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Statistics Tool

Graphical Statistics

User- definable graphical statistics are available in real- time or

postcapture modes. There are several SS7 message transfer part (MTP)

statistics, as well as user part specific statistics (e.g., message types or

release causes). Statistics are typically counts or ratios. The statistics

may be displayed graphically as:

• 2D Bar charts

• Radar diagram

Figure 10 shows a typical statistics graph.

Tabular Statistics

Tabular statistics are drawn by call traces. This provides a more detailed

and dynamic view of network performance, incorporating several program

measures. For example, gather performance data (handovers, errors, call

success rates etc.) about all BTSs attached to a single BSC in a GSM

network.

Time-based Statistics

It is possible to produce the graphical statistics as a tabular time series,

where the intervals can be set from one minute to 24 hours.

Statistic Thresholds

The user can set lower and upper thresholds which, when exceeded, will

result in color changes to the statistical graphs to highlight ‘‘alarm’’

conditions.

Ethernet Statistics (available with E7578A)

There are numerous predefined statistics available to help trouble shoot

your IP connection. Statistics such as frame length, node statistics, error

statistics utilization, runts, jabbers and trend displays are available. The

statistics can be viewed as pie charts, gauges, counts or over time.

Call-based Statistics

The most advanced statistics features involve using the call trace

application to evaluate call based statistics such as call completion ratio,

min/mean/max call setup times, min/mean/max call durations.

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Agilent Technologies 37907A Manual do Utilizador Página 26