Exalt Communications, Inc.
EX-5r Installation & Management
5000007
55
2006-05-17
components. In some cases, there may be antenna size restrictions that forced the design to not
have the desired amount of link margin.
If the link was designed with poor link margin, there will likely be many cases of bit errors and
outages. The antenna system and transmission line system, can be upgraded to help reduce this
opportunity.
If the link design was installed with sufficient margin, but RSL has reduced, the remaining link
margin may no longer be enough to maintain a reliable link. Causes of RSL reduction have been
described above, but are usually due to new path obstruction(s) or antenna misalignment due to
wind or mechanical factors. The antenna height or location can be changed to overcome new
obstructions. Realignment of the antenna, and/or improvement to mechanical structures can help
overcome antenna misalignment.
6.11 Moisture in the Transmission System
If the connectors on cables and antennas and egress junctions are not properly weatherproofed,
moisture can get into the transmission system and cause significant error conditions and erratic
performance. In many cases, the transmission system will need to be replaced if this occurs. A
VSWR meter is one means to identify such issues. Physical inspection can be helpful, and if
changes to the weatherproofing occur (such as cracks), the weatherproofing should be replaced
before it leaks.