Huawei OptiX RTN 980L V100 Quick Installation Manual page 18

Installation References
Installing Loads Or Short-circuit Modules
Loads or short-circuit modules must be installed for RFU
ports that are not in use.
Installing Ground Cables
Ground bar
Align the arrow on the load
with the guide trough. Fit the
load into the RFU.
Tighten the M6 screws
securely.
 Ground cables must be installed for all branching units
and RFUs.
 Apply anti-rusting grease to the ground bar or ground
point after installing the ground cable.
Installing Flexible Waveguides
a
Connecting a Flexible Waveguide
Use flexible waveguides when connections are required:
 The branching unit and the main antenna
 Two branching units
 In the SD configuration, the elliptical waveguide is connected to the antenna through a flexible waveguide.
After verifying that the flexible waveguide and the waveguide cavity of the branching unit or antenna are in the same
direction, tighten the screws. Fix the flexible waveguide using fixtures.
 The flexible waveguide is available in multiple types. This procedure for
installing the flexible waveguide is provided for reference only. In actual
installation, follow the instructions delivered with the flexible waveguide.
 Spacers are used for optimal waterproof performance when PDR flange
interfaces are interconnected.For example, Spacers are required when a
flexible waveguide is connected to a 6 GHz antenna.
 Upon delivery, the antenna ports of branching unit have been covered with protective caps. Loads have been installed
on cascade ports. Do not remove the caps or loads until these ports are going to be used.
 Waterproof the connectors between the flexible waveguide and the branching unit or antenna. For details about how to
waterproof the connectors, see "Waterproofing Outdoor Connectors".
2 Apply waterproofing and anti-corrosion treatments
on the connecting point of the flexible waveguide
Wrapping area:
 Distance (H) from the connecting point of the flexible waveguide to
the connector side ≥ 1 cm.
 Distance (L) from the connecting point of the flexible waveguide to
the cable side ≥ 10 cm.
Wrapping Method:
 Wrap one layer of PVC tape around the Wrapping area.
 Wrap three layers of waterproof insulation tape outside the PVC
tape.
 Wrap three layers of PVC tape outside the waterproof insulation
tape.
 Secure the tape by using outdoor binding straps at the positions 1
cm to the wrapping edges.
17
Spacer
M5 screw
Spacer
Flexible
waveguide
L≥10cm
outdoor
binding
straps
H≥1cm
In this example, a flexible waveguide is
connected to an antenna. The procedure for
connecting a flexible waveguide to another
device is the same.