P/N 1389990 Rev B (ECN 32099)
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Spread Spectrum Installation Guide
D. GPS
A hand held GPS device can be very useful when installing FieldNET systems.
Use the GPS device to record the location of pivot RTUs, Repeaters and Base
RTUs.
If your GPS device has a “go to” function you can use it to align antennas
by having the GPS device point to the antenna you are aiming at. The GPS
coordinates of the installed devices can then be entered into Google Earth and
saved to a file. Record the elevation as well as the coordinates for the latitude
and longitude.
E. FieldNET RTU
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Additional Information
The FieldNET RTU is a radio module installed at the pivot
control panel. It transmits data to and receives data from the
Base RTU connected to the Bridge. The FieldNET RTU is
connected directly to FieldBOSS and FieldVISION modules.
Panels that are not FieldBOSS or FieldVISION require a Basic
Link and a FieldNET RTU. The RTU is configured with internal
switches. The switches are used to configure the RTU for pivot
operation or as a Base (a RTU connected to the Bridge). The
switches are also used to select the hop pattern that the RTU operates on.
FieldNET RTUs are near line of site (NLOS) transceivers, which mean that direct
line of site is not required but the antenna the RTU is communicating with cannot
be completely obscured. With good line of sight the range of the RTU is
approximately 10-20 miles. Each site must be evaluated to determine the range
of the RTUs. Each installation site will have one FieldNET RTU per pivot to be
controlled.
