Chapter 5
Reverse Path Troubleshooting
This chapter outlines some reverse path troubleshooting problems and
discusses techniques you can employ with the SDA-5000. For future
application notes outlining more techniques, please see your local Acterna
CATV sales representative.
Table 5-1 offers some ideas on the best application of the SDA-5000’s
capabilities to help you troubleshoot reverse path problems.
INTRODUCTION
Table 5-1 Troubleshooting Reverse Path Problems
Problem Use This Tool
Ingress Spectrum mode
Modem channel high BER Zero Span mode
Signal levels unbalanced Reverse alignment techniques
Poor signal level in some channels Reverse sweep mode
Return path ingress PathTrak mode (OPT3) or Noise mode
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