User's Manual

RTK Base Station Setup
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Base Station Setup—Amplifier Option
CAUTION: Install and operate the amplifier
safely. Read and follow PREVENT ELECTRICAL
SHOCK AND FIRES and AVOID EXPOSURE
TO HIGH RADIO FREQUENCY FIELDS in
the SAFETY section.
The primary reason for 450 MHz RTK is to provide a more
robust RTK data link. Signal strength is the dominant
factor in the link reliability and range. For areas where
there are trees and other foliage, John Deere offers an
optional inline amplifier.
The PF81443 amplifier is a UHF RF power amplifier
intended for use in 450 MHz RTK system. It is not
intended to be used with 900 MHz RTK or any other
applications. The amplifier can deliver RF power from 0
to 50 W proportional to the 0 to 2 W input from 450 MHz
RTK Radio. It covers a frequency range from 450 MHz to
470 MHz. This higher signal strength provides greater
range from the base and increased coverage in areas
with dense foliage and trees.
This amplifier is inserted between the radio and the base
antenna. The amplifier has been designed to function
outdoors attached to its mounting plate with sun shade.
Mount the amplifier in an area where air can freely
circulate around it. If possible, mount in a location shaded
from direct sunlight.
Operation of the amplifier inside an enclosure is not
recommended. Poor ventilation within the box can
cause the amplifier to overheat. While this would not
permanently damage the amplifier, it would cause it to
PUPC000027 —UN—06DEC09
Amplifier Assembly
stop amplification. The output signal would no longer be
strong enough for the vehicles in the field to receive.
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