Aviat Networks ECLIPSE EDGE, Руководство пользователя

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18 Aviat Networks
Chapter 5. Eclipse Edge Commissioning and Troubleshooting
obstructed by construction works, view/survey the path for possible new
obstructions.
• Interference from other signal sources
Interference usually affects traffic in just one direction. Unlike other path problems,
RSL is not affected . If suspected, check for new link installations at the same site or
in the same geographical area. Ultimately a spectrum analyzer may have to be used
to confirm interference, which is not an easy task given the need to connect directly
to the antenna port, after removing the ODU.
Path Problems on a New Link
For a new link, potential problems can extend to also include :
• Incorrect antenna alignment
One or both antennas incorrectly aligned. For an alignment procedure, refer to
Antenna Alignment for Edge on page 28
.
• Mismatching antenna polarizations
Given a typical polarization discrimination of 30 dB, for most links a mismatched
polarization setting means it would not be possible to capture a signal to begin the
antenna alignment process.
• Incorrect path calculations
If the RSLs are too low or too high, antenna alignment is correct, and Tx power
settings are correct, check the path calculations used to determine the link
performance. A good calculation match is +/- 2 dB. Disagreements in excess of 3 dB
should be investigated.
• Reflections
Reflection (path cancellation) problems may not have been picked up at the path
planning stage, particularly if the survey was a simple line-of-sight. If suspected,
resurvey the path.
Troubleshooting Edge Configuration Problems
Configuration problems should only occur during the set up of a new link, or
reconfiguration of an existing link. The more common problems may be broadly
categorized as:
• General compatibility problems
The two alarms that may activate are Configuration Not Supported, and
SW/HW Incompatible:
• Configuration Not Supported : Check that the IDU/ODU pairing is correct.
• SW/HW Incompatible : Typically raised when new hardware (IDU or ODU) is
installed from an earlier release. To remove the alarm, compatible Eclipse
software is required; install the latest software.
• Incorrect circuit connections
No alarms are activated for incorrect circuit connections. An incorrect assignment
means the expected end-to-end circuit connectivity will not happen. Re-check
circuit assignments at both ends of the affected link.