Metrodata FM4900, User Manual

Page: 51 / 68

ANALYSING PERFORMANCE
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7. 5 Physical layer stats - Summaries
7 . 5. 1 Screen presentation
The summary report screens are designed to give a view of the alarm and error status on a
single screen. There is a choice of update frequencies of the data so that the user can
choose the optimum presentation at any time.
The type of Alarm or Error being monitored is shown in the left hand column of the screen.
Always check this when viewing a screen for the first time. If a diagnostic test is being run,
its name appears at the top right of the screen entitled
DIAGS .
The Temporary counts column is used to obtain error counts over a user definable test
period, the duration of which need not be time related to anything else, without erasing the
entire statistics database. You can reset the
Temporary counts by pressing C . This means
that a measurement may be started after a 15 minute interval has partly elapsed. The counts
are displayed for the temporary measurement period from its start until you clear it down by
pressing
C .
Pressing any key other than C or <esc> will instantly refresh the display. This applies to each
of the display styles - Static, Updated and 15 minute displays.
The Current 15-mins column gives the error counts for the current partial 15 minute period.
Therefore the duration of statistics within this column varies between 0 and 15 minutes in a
cyclical fashion as time passes.
The Previous 15-mins column gives the error counts for the previous complete 15 minute
period, assuming that there has been one.
The Last 24 hours column gives the error counts for the previous 24-hour period, as an
accumulation of the last 96 complete Previous 15-mins periods.
7 . 5. 2 Presentation display modes
The three DISPLAY MODES for summaries define the frequency with which the display data
is updated.
Static summary
This option presents the data as a single screen display, giving a snapshot of the current
status. The information in the display may be updated by pressing any key except <escape>.
Updated summary
This is similar to a static summary except that the screen is refreshed approximately every
5 seconds, and provides a dynamic display of events.
15 minute summaries
This updates the information in a summary at the end of each 15 minute period. This mode
is useful where a printer is connected to the terminal port and a detailed log is required.
Once one of these summary types has been selected for display, three styles of display are
available for selection, as described below.