User's Manual

QX Interfaces and Internal Modules I P/N 709C011101 I Page 6
1.3.2 QX Main Internal Modules
The QX main components consist of the following internal modules:
• Remote Hub Unit (RHU) – service specific unit, supports two voice services, converts the
optical signals received from the BU/OCH to RF signals (and vice versa) and routes them to
the coax antenna infrastructure (via the Four Port Service Combiner Unit – SCU-F).
• Add-On (AO) – adds an additional voice service to the host RHU (QX includes two AO
modules hosted by the RHU)
Note: The voice services are combined by the connected Service Combiner Unit (SCU).
• Antenna Monitoring Unit (AMU) – digital unit that enables antenna monitoring and relay
messaging of the following information:
• Antenna status
• Fans status
• Fans control
• AMU/QX alarms.
The AMU is connected to the SCU. The AMU modules of a number of QX units can be daisy
chained to a single SCU-F (see section
3.5.2.1).
• Fan Module – two extractable fans, simple to maintain and replace (see section
4.2).