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PLANNING WHERE TO PLACE REPEATERS
You should position your repeaters within a chain at equal distances apart unless you have
obstructions to overcome (see “Overcoming Obstructions” section). Avoid placing repeaters at
the edge of the maximum transmission range. This may lead to inconsistent reception due to
varying RF environmental factors. It is better to add one more repeater to a chain if you are on
the edge of the transmission range.
Consider the installation environment. Determine, if possible, whether or not your situation has
any significant RF interference or any minor obstructions. Use the following table to determine
the maximum distances you can place your repeaters apart from each other. Remember that a
weather station, console/receiver, Weather Envoy, and standard repeater all have dipole
antennas. You should use one of the Dipole antenna combinations to determine the maximum
distance between these devices and a long range repeater.
Maximum Transmission Distance Transmit
Antenna to
Receive
Antenna
Multiplier
Line of Sight with
Little or No
Interference
(Outdoors)
Minor RF
Interference or
Minor Obstructions
Into a Building or All
Outdoors with High
RF Interference
Into a Building
with Minor RF
Interference
Dipole to
Dipole
1.00
1000’
(300 m)
500 - 800’
(150 - 250 m)
200 - 400’
(60 m - 120 m)
100 - 320’
(30 - 100 m)
Dipole to Omni 1.58
1580’
(475 m)
790 - 1260’
(240 - 380 m)
320 - 630’
(100 m - 380 m)
160 - 510’
(50 - 150 m)
Dipole to Yagi 3.16
3160’
(950 m)
1580 - 2530’
(475 - 760 m)
630 - 1260’
(190 m - 380 m)
320 - 1010’
(95 - 210 m)
Omni to Omni 2.50
2500’
(750 m)
1250 - 2000’
(375 - 600 m)
500 - 1000’
(150 - 300 m)
250 - 800’
(40 - 240 m)
Omni to Yagi 5.00
5000’
(1500 m)
2500 - 4000’
(750 - 1200 m)
1000 - 2000’
(300 - 600 m)
500 - 1600’
(75 - 480 m)
Yagi to Yagi 10.00
10,000’
(3000 m)
5000 - 8000’
(1500 - 2400 m)
2000 - 4000’
(600 - 1200 m)
1000 - 3200’
(150 - 960 m)
If you unaware of whether you have RF interference, use the Line of Sight or the Minor
Obstructions column as appropriate to determine the maximum transmission distance between
repeaters. If you have higher levels of RF interference than you are aware, you will need to
install each repeater closer together.
If there are hazards (bodies of water, unstable ground, livestock range) along your transmission
path where you cannot place repeaters, then it is best to place one on each side of the hazard.
If the hazard is more than 10,000’ (3000 m) across, then try going around the hazard. In the
case where the weather station is located at the edge of the hazard and the distance across the
hazard is more than 1000’ (300 m), you will need a Long Range Repeater with a high-gain Omni
antenna for receiving, and a Yagi antenna for transmitting adjacent to the weather station. This
configuration will allow you to transmit up to 10,000’ (3000 m) across the hazard if you use a
long range repeater with a Yagi antenna at the other side of the hazard. One example of this
would be where a weather station is installed on a small island in the middle of the lake, which
must then transmit to the lake shore and this distance exceeds 1000’ (300 m) line of sight.
MOUNTING HEIGHT AND LINE OF SIGHT
Antennas transmit in both the horizontal and vertical direction. For this reason the antennas
effectiveness may be altered by objects that are not directly in the straight line of sight
transmission path or even the ground itself. For this reason, best results are obtained the
higher you mount antennas above the ground. The transmission distance specifications attempt
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