Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Chapter 3 Balancing and Setup
To Prepare the Amplifier for Initial Reverse Path Balancing
Complete the following steps for initial reverse path balancing.
1 Balance all of the reverse amplifiers off a given reverse input port for the node
1 Balance all of the reverse amplifiers off a given reverse input port for the node
being worked on. The reverse amplifiers should be balanced sequentially from
the node outward.
Note: Make sure the reverse fiber link has been properly balanced before
Note: Make sure the reverse fiber link has been properly balanced before
proceeding.
2 Ensure that the design value reverse output equalizer and reverse pads are
installed in the appropriate reverse slots in the amplifier. Refer to the following
diagram.
Note: Record the pad values for each input port for later use.
Note: Record the pad values for each input port for later use.
3 Proceed to To Calculate the Proper RF Signal Level.
To Calculate the Proper RF Signal Level
In order to calculate the correct RF signal level to inject, you must know the
following.
Design Reverse Port Input Level from the design print
Total Injection Insertion Loss (20 dB)
To calculate the correct signal level to inject, add the total injection insertion loss to
the design port input level.
Example
Design amplifier reverse port input level = 19 dBmV
Total injection insertion loss = 20 dB
The design amplifier reverse port input level plus injection insertion loss equals
56
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