Manual

Table Of Contents
39745-814-B11-001, Rev. C (03/2014)
4.11.2 QAM Constellation Common Impairments, continued
4.0 Web Interface
Fig. 4-24, Twisted or Skewed (Quadrature Distortion) and Entire Constellation Shape
4.11.3 Microreections Tool
The Microreections page provides details about impairments on the DOCSIS network and the
approximate distance(s) of the impairment(s). In order to provide the analysis and a display of possible
impairments, this tool requires the Adaptive Equalization function to be enabled on the CMTS.
Navigate the mouse pointer to the Tools menu item and select “Microreections” in the drop down
menu to open the Microreections page.
Fig. 4-25, Microreections Tool
(data values shown for illustration purposes only)
Click on a particular bar in the graph to display the details of the impairment such as time,
distance (feet & meters) and amplitude in the table below. The selected bar will turn a slightly
different shade of color compared to other bars in the graph.
Entire QAM constellation