Performing Docsis ® Measurements - JDS Uniphase Wavetek DSAM Series Quick Start Manual

Chapter 2 DSAM Meter Operation
Using Measure Mode
Figure 21 Upstream Spectrum Mode Screen
To configure Upstream Spectrum Mode, select the
measurement limit option (or turn it off), and (if it is on) set
an appropriate pass/fail limit value for your installation.
Position the marker at each frequency to display the level
value.
Use the up and down arrow keys to adjust the reference
setting of the graph by one (1) dB per key press. Use the
right and left arrow keys to move the vertical marker to the
next or previous measurement data point.
Prior to an installation, use upstream spectrum measure-
ments to verify that the system does not exceed the
maximum acceptable level for ingress. After an installa-
tion, check the level again to compare the previous
reading and confirm that install procedures or components
did not create new sources of ingress.
Performing
DOCSIS® Mode analyzes the digital performance of user-
selected DOCSIS® channels to verify downstream/
DOCSIS ®
upstream connectivity. Only primary DOCSIS® channels
Measurements
defined in the downstream (forward path) channel plan are
available for DOCSIS® measurement testing. Non-
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