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Rev A 7/28/06 25 - 1
INSTALLING REPEATER NETWORKS Application Note 25
for Vantage Pro2™ systems
INTRODUCTION
This document outlines the process to determine what repeaters may be needed and how they
should be placed and configured to bring weather data from one location to another. With the
superior wireless transmission scheme of the Vantage Pro2, it is possible to send data much
greater distances. This, in turn, provides greater flexibility, but also greater complexity in the
possibilities of various station layouts. This document will attempt to simplify this decision
process.
REPEATER NEEDS
Determine whether you actually need a repeater. If you have a major obstruction(s) or already
know that you need to employ multiple chains in your network, then you will need a solution to
extend your data transmission range. The following table lists the conditions where standard
equipment should be sufficient (ISS™ + console or Envoy™ receiver).
Distance to Transmit Environmental Conditions
<300’ (90 m) Any (excepting Major Obstructions)
<400’ (120 m) Indoors or High RF interference Outdoors
<800’ (240 m) Minor Obstructions or Low RF interference Outdoors
<1000’ (300 m) Line of Sight (Outdoors)
If your distance requirements exceed those in the table above, then you will need a solution to
extend the range of data transmission:
If cost is a concern for your setup, then determine whether you have AC power and a
land-based phone line near (within 1000’ of the weather station) where you want to place
your weather station. If they are both available, then purchasing WeatherLink™
software and external telephone modem is your most cost effective solution (see
Application Note 27).
If cost isn’t an issue and cellular service is available where the weather station is
located, then you may want to consider purchasing WeatherLink software along with a
cellular telephone modem.
If neither type of telephone service is viable, you will need to employ repeaters in your
layout. However, the longest transmission distance from weather station to receiver
cannot exceed 14.4 miles (23.3 km).
It is impossible to cover all the possible scenarios that might be encountered in real-world
situations. This document will attempt to give the most common examples and provide the tools
needed to help you to determine what you will need for your specific application. For specific
information on how to mount and configure your repeater, consult the Wireless Repeater for
Vantage Pro2 instruction manual. Bear in mind that due to unanticipated levels of RF
interference, you may need more repeaters in your network than your careful planning may
indicate. You may not come to this realization until you begin to test and install the elements of
your network.
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Inhaltsverzeichnis

Seite 1 - Application Note 25

Rev A 7/28/06 25 - 1 INSTALLING REPEATER NETWORKS Application Note 25 for Vantage Pro2™ systems INTRODUCTION This document outlines the proces

Seite 2 - 25 - 2 Rev A 7/28/06

25 - 10 Rev A 7/28/06 The following table covers the shorter ranges where a standard repeater should be sufficient. Standard Minimum Repeater Re

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Rev A 7/28/06 25 - 11 The 7660 Yagi antenna has much greater performance in one direction, at the sacrifice of all other directions. Its transmiss

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25 - 12 Rev A 7/28/06 Determine whether you can use all Yagi antennas in your network. If any of the situations below apply, you may use table on

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Rev A 7/28/06 25 - 13 You may need to use high-gain Omni antennas at one end of your transmission chain(s): • If your weather stations are spread

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25 - 14 Rev A 7/28/06 The legend below describes the antenna types and how they are represented in the sample antenna configuration: The first sym

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Rev A 7/28/06 25 - 15

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25 - 16 Rev A 7/28/06 PLANNING WHERE TO PLACE REPEATERS You should position your repeaters within a chain at equal distances apart unless you have

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Rev A 7/28/06 25 - 17 to take the ground into account, and to a lesser extent, minor obstructions in the transmission path. Assuming there are no

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25 - 18 Rev A 7/28/06 First, power up and test just the weather station(s) and receiver(s) in your living room, garage or office before placing the

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Rev A 7/28/06 25 - 19 However, if your background noise value is 10 or higher, force a resynch on the console and move the repeater gradually close

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25 - 2 Rev A 7/28/06 WIRELESS THEORY OF OPERATION In any weather station setup, there are two types of wireless equipment: transmitters and re

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25 - 20 Rev A 7/28/06 Consult the wireless repeater manual troubleshooting section to determine the problem and course of action.

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Rev A 7/28/06 25 - 3 USING ONE REPEATER WITH ONE TRANSMITTER All repeaters have an ID that is indicated by a letter (A through H) and the ability

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25 - 4 Rev A 7/28/06 Information is added to the packets that a repeater transmits, (i.e., that this packet came from Repeater A), so that rece

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Rev A 7/28/06 25 - 5 USING ONE REPEATER WITH MULTIPLE TRANSMITTERS More than one transmitter can be repeated. Select additional transmitter ID’s

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25 - 6 Rev A 7/28/06 Additionally, Repeater B will only acquire data packets being re-transmitted by Repeat

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Rev A 7/28/06 25 - 7 REPEATER TYPE AND ACCESSORY NEEDS This section will help you determine what types and quantity of repeaters, if any, you

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25 - 8 Rev A 7/28/06 multiple receiving locations. If you need multiple chains in your repeater network and want to use less than 8 repeaters, you

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Rev A 7/28/06 25 - 9 Overcoming Major Obstructions Whether you go over or around an obstruction, you should choose whichever is the shortest dista

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