Aviat Networks ECLIPSE EDGE, Руководство пользователя

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260-668080-001 Rev 002 March 2013 15
Eclipse Edge User Manual
Additional Information
The Rx synthesiser sets the link receive frequency. Failure will affect all
communications from the remote radio. Downstream path failure and path warning
alarms will also be activated.
SESR Threshold Exceeded
G.826 severely errored seconds ratio exceeded. This is a warning alarm.
Probable Cause
Path conditions, interference or equipment malfunction.
Recommended Actions
• Check for other alarms, particularly those that indicate a total LOS due to a
component failure, or a complete path failure:
- Component failure or Rx path failure alarms must be checked before
investigating an SESR Threshold alarm.
- If the only other alarms are Demodulator Not Locked, and its downstream path
failure and path warning alarms, a path failure is indicated, which may be caused
by a complete path fade or a remote Tx failure.
- If SESR Threshold Exceeded and other G.826 path warning alarms
are the only
alarms active , check G.826 and RSL measurements at both ends using the Portal
Performance screen:
- If low RSL and G.826 alarms are present
at both ends of the link , a path
problem is indicated, which most likely will be caused by a degraded path due to
rain, diffraction or multipath fading. Check recommended actions for BER
alarms.
- If ESR and SESR alarms are present
at just the local end and RSL is normal ,
interference from another link should be suspected. Use the Portal History and
Event Browser screens to track the onset of ESR alarms, which for a newly
installed interfering link should show a repetition of G.826 alarm occurrences as
the new link is installed and commissioned.
Additional Information
An SESR threshold alarm will be preceded by an ESR threshold alarm, and BER
alarms.
A severely errored second is one-second period, which contains at least 30% errored
blocks or at least one defect. After 10 consecutive SESs a link is considered to be
unavailable.
SESR is the ratio of SES to total seconds in available time during a fixed measurement
interval. For Eclipse the measurement interval is 60 seconds, and the alarm
threshold is 10 percent.
Traffic Path Down
The radio path is down. True for non-protected and for protected/diversity
configurations. This is a critical alarm.
Probable Cause
Path loss or equipment malfunction.
Recommended Actions