Cisco Prisma II bdr Dig Rev 2 1 Dual Mux Sys for High Density Installations Guía De Instalación
78-741939-01 Rev C Reverse Balancing the Node with the Enhanced Digital Reverse Modules
3-5
Port Combination Options
Factory Default Port Combination in the Model 6940 4-Port Node
This table gives the factory default port combination scheme in the Model 6940
4-Port Node.
Port Identifier on
the Node
Cable Color Code
Connection on 2:1 Enhanced
Multiplexing Digital Module
Port 3
White
Top
Port 4
Blue
Second to top
Port 5
Black
Second to bottom
Port 6
Green
Bottom
Notes:
•
If the above cable color code recommendation is followed, then the blue and
white cables connect to ports 3 and 4 whose reverse paths are combined. The
black and green cables connect to ports 5 and 6 whose reverse paths are
combined.
•
The opposite end of these colored coax cables should be connected to the node
ports whose reverse paths are to be combined.
•
Internally, the signals of the two lower RF input connections of the 2:1 enhanced
multiplexing digital module are combined to provide a single RF signal.
Similarly, the signals of the two top RF input connections of the 2:1 enhanced
multiplexing digital module are combined and further coupled with the Status
Monitoring Input signal to provide a second RF signal. Refer to the Block
Diagram of the 2:1 Enhanced Multiplexing Digital Module in Chapter 1.
Port Combination Option in the Model 6940 4-Port Node
In order to better balance the reverse path signals, the ports can be connected
differently than shown in the table above. The following table gives an example of
connecting the ports differently.
Port Identifier on
the Node
Cable Color Code
Connection on 2:1 Enhanced
Multiplexing Digital Module
Port 3
White
Top
Port 5
Black
Second to top
Port 4
Blue
Second to bottom
Port 6
Green
Bottom