Technical Description
4.3 Radio Unit (RAU)
4.3.1 Overview
The basic function of the Radio Unit (RAU) is to generate and receive the RF
signal and convert it to/from the signal format in the radio cable, connecting
the RAU and the MMU. It can be combined with a wide range of antennas in
integrated or separate installation. The RAU connects to the antenna at the
waveguide interface. Disconnection and replacement of the RAU can be done
without affecting the antenna alignment.
DC power to the RAU is supplied from the MMU through the radio cable.
The RAU is a weatherproof box painted light gray, with a handle for lifting and
hoisting. There are also two hooks and catches to guide it for easier handling,
when fitting to or removing from an integrated antenna. It comprises a cover,
vertical frame, microwave sub-unit, control circuit board and filter unit.
The RAU is independent of traffic capacity. The operating frequency is
determined by the RAU only and is pre-set at factory and configured on
site using MINI-LINK Craft. Frequency channel arrangements are available
according to ITU-R and ETSI recommendations. For detailed information on
frequency versions, see the
Product Catalog and MINI LINK TN ETSI Product
Specification.
Two types of mechanical design exist, RAU1 and RAU2.
RAU1 RAU2
RADIO
CABLE
ALIGNMENT
ALARM
POWER
8458
Figure 61 RAU1 and RAU2 mechanical design
80
12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14
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