Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Configuring the Reverse Path
Configuring the Reverse Path
The node reverse path includes up to four input ports and up to two output ports.
As shown in the preceding diagram, the node includes four reverse path input ports,
Port 1, Port 2, Port 3 and Port 4, and two output ports, Rev1 Out and Rev2 Out. A
reverse path plug-in jumper determines how the signals at each port are configured
and presented to the output ports following amplification. A reverse path plug-in
jumper also determines how the output ports are routed to one or two transmitters
mounted in the lid of the node.
The following three basic reverse path configurations are available.
The following three basic reverse path configurations are available.
Segmented Reverse Path
Combined Reverse Path with Transmitter Redundancy
Combined Reverse Path without Transmitter Redundancy
The initial configuration is determined by the 16-digit part number used when
ordering. However, the configuration is upgradable in the field. This section
provides the information needed to upgrade the node reverse path configuration.
For additional information, see Installation and Configuration.
Note: To achieve better transponder signaling, a 75 ohm plug-in pad is added into
Note: To achieve better transponder signaling, a 75 ohm plug-in pad is added into
the new OIB board to segregate the DOCSIS transponder signal in one single reverse
path. When the transponder is removed, the OIB board can be configurable by
replacing the 75 ohm pad with a 0 dB pad to return to dual reverse signal paths.
Segmented Reverse Path
Note: This configuration is recommended for use with a bdr 2:1 transmitter module.
See Appendix B bdr Digital Reverse Multiplexing Applications (on page 93) for
additional details.
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