User's Manual

System Architecture I P/N 709C011101 I Page 3
• RF to Optic converter unit – this can either be a Base Unit (BU) or an Optical Control
Head End Unit (OCH), where the OCH is QX model specific. These are wideband units that
convert the RF Downlink (DL) signals from the RIU into optical signals for routing over
single or multi-mode fiber optic cabling (SMF/MMF) to/from the QX units located at the
remote locations up to 2Km away.
• System Controller (SC-450) - the system controller enables centralized remote
management and control of MobileAccess elements. This unit connects directly to the RIU
and BU and/or OCH and allows management of these as well as their hosted elements (e.g.
QX) via a controller Web session.
Remote End:
At the remote end, the optical signal is reconverted to RF, filtered, amplified to the appropriate
level, combined with other signals and distributed over the broadband antenna infrastructure.
The QX unit is installed, along with the Four Port Service Combiner Unit (SCU-F). The QX
system remote end consists of the following elements:
• QX - each QX unit provides coverage for four RF services (e.g. CELL, PCS, 700LTE and
AWS) via two types of service dedicated internal modules (RHU and AO). Each of these
modules is monitored via the Controller as an independent unit.
• Service Combiner Unit (SCU-F): a passive module that combines and distributes the UL
and DL signals from one or more QX units to (up to) four broadband antennas.
QX Solution System Architecture Figure 1-3