User manual

Equipment and cable installation
Equipment and cable installationEquipment and cable installation
Equipment and cable installation
This offers a general explanation of how to install the IDU and satellite receiver properly to
the inside of vessel connecting with coaxial cable.
1. The Coaxial cable is routed from the antenna to the IDU inside the vessel.
2. After Once deciding where to place the IDU and satellite receiver, make sure that both
units are placed in a dry and protected area.
3. The IDU and satellite receiver should be placed away from any heat source and in an
area with proper ventilation.
4. Ensure that there are at least 3cm of space around both units for ventilation and
connection of cables. Do not stack the units on top of each other.
5. The following describes the basic wiring configurations for the antenna system.
■ Connect the Coaxial cable to the antenna port on t
he back of the IDU
■ Connect one end of the supplied coaxial cable to the receiver port on the back of
the IDU
■ Connect the other end of the coaxial cable to the satellite receiver
Setting the LNB
Setting the LNBSetting the LNB
Setting the LNB skew angle
skew angle skew angle
skew angle (manual)
(manual)(manual)
(manual)
Figure 2-3 Satellite signals
Signals transmitted in vertical(red) and horizontal(blue) wave offset exactly 90º from each
other. Since linear satellite signals are oriented in a precise cross pattern, Free Way 1S
antenna’s receiving element, called an LNB (low-noise block) must be oriented in the same
way to optimize reception. This orientation adjustment is referred to as the LNB’s “skew
angle.” Figure 1-4 illustrates how skew determines the amount of signal the LNB collects.
The more signal, the better reception.
Figure
2
-
4 Best Skew Angle
Bad
skew
Good
skew
Best
skew
: LNB “signal collector”
: Satellite Signal