Campbell Scientific TurfWeather Weather Station - Manual (Page 23)

TurfWeather Weather Station
damage to the weather station and/or the host computer. A qualified electrician
should design and install the grounding system.
5.3.2 Wireless Communications
Wireless TurfWeather weather station systems use industrial grade spread
spectrum radios.
5.3.2.1 Transmission Ranges
Site your TurfWeather weather station within the spread spectrum radio
transmission range. Typical transmission ranges are listed below:
• Up to 0.8 km (0.5 mile) for the weather station 916 MHz and weather
station 922 MHz
• Up to 0.4 km (0.25 mile) for the weather station 2.40 GHz
• Up to 11.25 km (7 mile) if an optional higher gain antenna is installed on
both the weather station and the RF401-series base station
a. The transmission ranges assume standard weather station
antennas are used at the computer site. User-supplied, higher gain
antennas at the base station or on the weather station can increase
the transmission range.
b. The ranges assume no obstructions are in the line-of-sight.
Line-of-sight is defined and described below.
c. Other radios on the same frequency can cause interference
issues.
5.3.2.2 Line-of-Sight
Line-of-sight is defined as a straight path between a transmitting and receiving
antenna that is unobstructed by intermediate topography or obstructions. A
clear line-of-sight is required to achieve the optimum transmission range. The
effect of obstructions on the transmission range can vary. Therefore, if
obstructions lie within the line-of-sight, you should test your radio
transmissions before permanently installing your weather station (see Section
5.3.2.3, Testing Radio Transmissions).
FIGURE 5-2 is a line-of sight example. In this example, the dotted line
indicates that Station 1 has a clear line-of sight with the computer site. The
mountain obstructs Station 2’s line-of-sight and will reduce or possibly prevent
wireless communications.
NOTE
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