User Manual
MDR2400 and MDR5800 User Manual
862-01881 Issue 8 Page 59
Default RF
Parameters
Activated
The Operational RF parameters were programmed into the Outdoor Unit
by the local and remote Indoor Units. Communication between the two
Indoor Units has not reactivated within 5 seconds. To recover
communication the Indoor Unit has selected the ‘Default’ RF parameters
and programmed the Outdoor Unit with them.
6.7.2 Packet Error Rate Thresholds
Packet error rate (PER) is calculated as the ratio of the number of uncorrectable
blocks over the number of blocks transmitted per second. Three PER thresholds are
provided for each monitored link, these are:
• Minor PER Threshold – this threshold defaults to 0.0002 and triggers an alarm if the
calculated PER exceeds this value.
• Major PER Threshold – this threshold defaults to 0.02 and triggers an alarm if the
calculated PER exceeds this value.
• Fault PER Threshold – this threshold defaults to 2.0
and triggers an alarm if the
calculated PER exceeds this value.
6.7.2.1 G.826 Thresholds
Three G.826 thresholds are provided for each monitored link. Each of these ratios is
calculated once every second and will trigger a fault condition if the ratios exceed the
programmed thresholds that are:
• Errored Second Ratio Threshold – this threshold which defaults to 4 X 10
-2
triggers
an alarm if the calculated ESR exceeds this value over the measurement period
(Report Time).
• Severely Errored Second Ratio Threshold – this threshold which defaults to 2 X
10
-3
triggers an alarm if the calculated SESR exceeds this value over the
measurement period (Report Time).
• Background Block Error – this threshold which defaults to 6.25 X 10
-2
triggers an
alarm if the calculated BBER exceeds this value over the measurement period
(Report Time).
6.7.2.2 Link Availability
A period of unavailable time begins at the onset of ten consecutive SES events.
These ten seconds are considered to be part of unavailable time. A new period of
available time begins at the onset of ten consecutive non-SES events. These ten
seconds are considered to be part of available time. The figure below illustrates this
definition.