User's Manual

VOLUME I, CHAPTER 1, HEALTH AND SAFETY
Routine Inspection and Maintenance
This section overviews required and recommended inspection and maintenance prac-
tices to ensure health and safety of installed equipment is maintained to highest lev-
els. For more information, refer to the Aviat Networks publication: Best Practices.
Routine Inspections
All sites must be inspected annually, or more frequently if subject to abnormal oper-
ating conditions such as particularly exposed sites, or sites subject to salt-spray or
heavy snow/ice loading over winter months.
The inspection should cover the physical installation including the antenna, wave-
guide, waveguide pressurization installation, equipment grounding, tower and build-
ing grounds, weatherproofing, and general site integrity.
Where a Fan Air Filter is installed in an INU (for NEBS compliance) it must be
inspected annually, or more frequently if the INU is installed in an environment that
is not controlled for dust exclusion.
Selected ground wires should be resistance checked and then compared with pre-
vious checks to ensure there has been no significant change.
The operational performance of the radio and associated equipment should be
checked against their as-built figures using the Portal or ProVision alarm and per-
formance indicators.
Trend Analysis
Use available current and historical Eclipse alarm and performance data to deter-
mine any trend that may lead to a failure - if allowed to continue.
Check for the following trends:
l Reducing receive signal levels
l Gradually increasing bit errors or an increasing errored seconds count
l Changes in transmit power
l Increased frequency of rain fade or other fade conditions
l Increasing occurrence of other weather related changes in performance
l Increasing occurrence of a particular hardware failure
Time spent in conducting such analysis is time well spent. Catching a problem
before it brings down the network is good network management.
12 AVIAT NETWORKS