Neptune R450 MC, Installation And Maintenance Manual

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Product Description
R450 Mini Collector Installation and Maintenance Guide 7
Performance Considerations with the R450 System
This section addresses situations where the system is functioning but
R450 MC or MIU communication is not performing as expected.
This discussion covers two situations.
• The first is getting the newly installed system to perform per
specification.
• The second covers an installed system where the performance
degrades suddenly or over time.
Optimizing the Performance of a New System
Before you install the system, Neptune uses computer software and
other resources to predict the performance of the system and
recommend a minimum number of R450 MCs to provide the desired
performance. Each site has a survey performed that provides
recommendations on antenna placement and looks for potential radio
interference problems. These steps can identify many of the potential
problems but may not be able to identify all the problems encountered
during installation and maintaining the system.
It is possible for a piece of equipment to be functioning totally within
its required specifications and still cause interference with the
R450 System. The collaborative effort of all the affected parties is
required to solve this type of problem.
During the initial installation of a site, Neptune advises using a receiver
or high quality spectrum analyzer connected to the antenna to assure
that the transmit and receive frequencies are free from interference.
Additionally, be sure that there are no potentially interfering signals
around the frequencies used by the R450 MC, both transmit or receive.
The overall noise level could potentially reduce the sensitivity of the
R450 MC or MIU receivers. A recommended receiver is the Icom IC-
PCR1500 which includes a PC interface. A Rohde & Schwarz FSH3.03
or FSH3.23 spectrum analyzer is also acceptable.
If Neptune’s propagation model is not followed, then the
resulting performance may not meet expectations.
Owners of both licensed and unlicensed equipment are responsible for the
proper operation of their equipment. If it is not operating within specifications,
the owner is required to bring the systems into compliance or stop using it.
This can be beyond the capability of most homeowners and small
businesses, requiring a cooperative effort to solve.