DAVIS Envoy8X Long Range Repeater Installation Addendum - Manual (Page 7)

5
Antenna Ranges
Each antenna type in a repeater network varies in the distances it can receive and transmit
data. For instance, the dipole antenna on an ISS station transmitting to a dipole antenna
on a console is limited to 1000'. A dipole transmitting to an external omni antenna length-
ens the distance to 1580', because the distance can now be 1.58 times greater between an
omni antenna and a standard dipole than it could with two standard dipole antennas. The
range multiplier table below displays the exact multiplier distance you should use to
determine the antenna distances and which antennas would best suit the needs and dis-
tances in your network:
Use the following multiplier matrix to determine the antenna relationship(s) that will best
suit the needs of your weather station network:
Antenna Configurations
Given the various antenna types and their various distance and range reputations, it
important to explore the types of antenna configurations and how they could impact a
weather network.
Antenna Type Multiplier
Dipole 1
Omni 1.58
Yagi 3.16
Dipol
e
Omni Yagi
Total
Multipli
er
Total
Distance
Dipole X 1 1000’ (300 m)
Dipole X 1.58 1580’ (480 m)
Dipole X 3.16 3160' (960 m)
Omni X 2.5 2500' (762 m)
Omni X 5
5000' (1542
m)
Yagi
X 10
10000´ (3048
m)