User's Manual

Expansion Hub Front Panel
4-4 InterReach Fusion Wideband Installation, Operation, and Reference Manual
CONFIDENTIAL D-620616-0-20 Rev D
4.2.1 75 Ohm Type F Connectors
The eight type F connectors on the Expansion Hub are for the CATV cables used to
transmit and receive signals to and from RAUs. Use only 75 ohm type F connectors
on the CATV cable.
The CATV cable also delivers DC electrical power to the RAUs. The Expansion
Hub’s DC voltage output is 54V DC nominal. A current limiting circuit protects the
Hub if any port draws excessive power.
NOTE: For system performance, it is important to use only low loss solid cop-
per center conductor CATV cable with quality type F connectors that use captive
centerpin connectors. Refer to Appendix A for approved cables and connectors.
4.2.2 Manufacturing RS-232 Serial Connector
Console Port
This console port is only used by ADC manufacturing test purposes. DO NOT CON-
NECT ANYTHING TO IT.
Local Monitoring
Use a crossover Ethernet cable (PN-4069-ADB) to directly connect a laptop or PC to
the RJ-45 female connector for local monitoring or configuring the Expansion Hub
and associated RAUs using the AdminBrowser-EH resident software. The cable typi-
cally has a RJ-45 male connector on both ends. Refer to Appendix A.5 on page A-8
for the cable pinout and the AdminBrowser manual.
4.2.3 Optical Fiber Uplink/Downlink Connectors
The optical fiber uplink/downlink port transmits and receives optical signals between
the Expansion Hub and the Main Hub using industry-standard SMF or MMF cable.
The fiber port has two female SC/APC connectors:
• Optical Fiber Uplink Connector
This connector (labeled
UPLINK) is used to transmit (output) uplink optical signals
to the Main Hub.
• Optical Fiber Downlink Connector
This connector (labeled
DOWNLINK) is used to receive (input) downlink optical sig-
nals from the Main Hub.
CAUTION: To avoid damaging the Expansion Hub’s fiber connector
ports, use only SC/APC fiber cable connectors. Additionally, use only