LightPointe AireLink 60, Installation And User Manual

Page: 61 / 133

AireLink

60 Installation and User Manual Rev. D System Installation
Page 61
5.5 ODU INSTALLATION (EXTERNAL ANTENNA SYSTEM ONLY)
After installing the antenna, please ensure that the radios on each side operate in the same
polarization. In other words, the physical orientation of the radio enclosure (ODU) must be the same
on both sides. There is an arrow symbol imprinted on the back of the ODU that must point in the same
direction, either upwards (vertical polarization) or sideways (horizontal polarization), when looking at
the back of ODU (see Figure 5-2). This ensures that both radio antennas operate in the same horizontal
or vertical polarization plane. To attach the ODU to the antenna, simply guide the ODU onto the round
metal flange on the back of the antenna.
Use a drop of silicone grease to lubricate the O-ring.
This will ease the process of pushing the ODU onto the antenna waveguide flange. Slightly
rotate the ODU while pushing it towards the antenna base plate, and ensure to not destroy the rubber
O-ring that serves as a seal/gasket between the antenna flange and the ODU housing.
Figure 5-2: ODU Polarization Directions
Once the ODU it pushed all the way down onto the antenna baseplate and aligned correctly in either
horizontal or vertical position, fasten the 4 spring loaded latches to finalize the attachment of the ODU
to the antenna base. Fig. 5.3 shows the AireLink™ 60 system with the ODU installed.
A transmission link that uses a different polarization on each side will not
function properly.
It is also critically important that a high-band radio on one side is paired with a low band radio on the
opposite side to ensure proper operation. Before installing the radio units check each radio to verify
one is a high-band and the other is a low-band version. A sticker on the ODU user panel indicates the
HIGH BAND and LOW BAND unit. When installing a 60 GHz radio link under a network license, ensure
that the low-band and the high-band radios are installed at each side according to the assigned and
approved frequency allocation plan.