User guide

Installing antennas and ODUs Chapter 5: Installation

5-26

phn-2513_004v000 (Oct 2012)

Installing a remote mount antenna with two ODUs (via coupler)

In the remote mount configuration, attach the antenna and coupler (with two ODUs) to the

mast separately, connected to each other via a flexible waveguide. The flexible waveguide

is designed to isolate vibration and eliminate difficulties caused by misalignment.

Protect the flexible waveguide from damage that may be caused by contamination,

vibration or bending. Observe the precautions in Installing a remote mount antenna with

one ODU on page 5-9.

Before installation, check that the ODUs, coupler, RMK, waveguide and antenna have

compatible interfaces.

If the coupler is asymmetric, one side is embossed with the word ‘MAIN’ and the other

side with ‘STANDBY’ (Figure 74). The ‘MAIN’ side has lower loss. Ensure that the ‘MAIN’

and ‘STANDBY’ sides can still be identified after the ODUs are fitted, as this allows them

to be connected to the correct CMUs.

Attaching coupler to RMK

To attach the coupler to the RMK, proceed as follows:

Ensure the correct RMK, coupler and flexible wave guide are present for the

frequency band.