User's Manual

Unit Descriptions - RF Path
P/N 709C011801
Page 33
2.1.1.3 RIX (RF Expander Module)
The RIX Expander module provides the RF interface to the OIU unit. Two RIX Expander modules can be installed in each HEU
chassis, to support up to four OIU (per HEU). If only one Expander module is installed, it is required to terminate the empty slot
with the supplied termination.
NOTE: The OIU Expander Modules are similar in appearance to the HEU Expander modules but are NOT INTERCHANGEABLE.
Each Expander module is indicated as RIX or OIX on the bottom of the module.
Figure 2-5. RIX Expander Module Interfaces
2.1.1.4 PSM (Power Supply Module)
NOTE: The Power Supply modules and installation are the same for the HEU and OIU chassis. If two power supplies are
installed, both must be switched ON to begin system operation.
The HEU (and OIU) chassis can support two power supply modules (110-240VAC), where the second power supply provides
redundancy in case one of the supplies fails. If two modules are installed, both must be connected to the AC outlet and turned
on at all times.
Figure 2-6. Power Supply Module