Cisco Cisco 1 GHz GainStar Node Installation Guide

, Continued

4042027 Rev A 

 

v 

 

Balancing the Forward Path .................................................................................................................. 3-3

 

Introduction ................................................................................................................... 3-3 
To test the Forward Input Optical Power .................................................................. 3-3 
To Verify the Local injection Input Level .................................................................. 3-4 
To Determine the Output Tilt...................................................................................... 3-6 
To Set Up the Local Injection Tilt ................................................................................ 3-7 
To Set Up the Output Tilt ............................................................................................ 3-8

 

To Set Up the Forward Output Level....................................................................... 3-10 

Balancing the Reverse Path .................................................................................................................. 3-11

 

To Set Up the Reverse Input Level ........................................................................... 3-11 
To Set Up the Reverse Output Level ........................................................................ 3-12 
To Set Up the Equalizer Value for Reverse Path .................................................... 3-13 

Setting OMI for Reverse Path Transmitter ........................................................................................ 3-16 

To Set Up the OMI for Reverse Path Transmitter .................................................. 3-16 

Chapter 4 

Trouble Shooting 

Equipment ................................................................................................................................................ 4-2

 

Low RF Output ........................................................................................................................................ 4-3 
No Forward RF Signal ............................................................................................................................ 4-4

 

Low or Degraded Forward RF Signal .................................................................................................. 4-5

 

No Reverse RF Signal ............................................................................................................................. 4-6 
Low or Degraded Reverse RF Signal ................................................................................................... 4-7 
Troubleshooting Carrier-to-Noise Problems ....................................................................................... 4-9 
Miscellaneous Problems ....................................................................................................................... 4-10 
No Power Supply .................................................................................................................................. 4-11 
Cleaning Optical Connectors ............................................................................................................... 4-12 

Recommender Equipment ......................................................................................... 4-12 
Tips for Optimal Fiber-Optic Connector Performance .......................................... 4-12 
To Clean Optical Connectors ..................................................................................... 4-13 
Fiber Optic Connector Cleaning Instructions ......................................................... 4-13