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Conduct Site Survey
A site survey is required prior to installing the ISS . The site
survey will help determine the number of Soil Sensors, Data
Loggers and Repeaters that are necessary for installation
site coverage.
Locations
Using a scaled map of the golf course or irrigation site, mark
the potential locations for each network device (ISDL-2400,
ISR-2400, and antenna) that will ensure optimum wireless
communication. Figure 6 shows an example site survey
location map.
NOTE: The unobstructed line of sight wireless range
between units is guaranteed to be at least 800 yards,
but factors such as changes in vegetation coverage
through the seasons, tree and leaf growth, and new
construction projects may aff ect wireless ranges.
General Considerations
To take advantage of mesh networking, each Data Logger
should be installed within wireless range of at least two
other Repeaters to establish an alternate signal path.
Each Repeater should be installed within range of at least
two other Repeaters.
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Integrated Sensor System
The Gateway antenna should be within range of at least
two Repeaters.
Produce a map of the wireless network to determine the
total number of network devices that will be required for
installation and for future reference.
Failure to conduct a site survey may lead to poor network
communication.
Data Logger Considerations
The maximum cable length between the furthest sensor
on either wire path and the ISDL-2400 should not exceed
300 feet.
Each wire path from the ISDL-2400 has a capacity of up to
8 sensors.
Repeater Considerations
One ISR-2400 can receive data from multiple ISDL's,
provided they are within wireless range.
A maximum of 7 hops are allowed between the farthest
unit (ISDL-2400 or ISR-2400) in the network and the radio
antenna.
Once a preliminary map has been created, range tests need
to be conducted in the fi eld to verify wireless ranges between
components. See the Wireless Network Range Test section for
instructions.
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