Operation Manual

Certifying Twisted Pair Cabling
Twisted Pair Autotest Results
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Figure 3-15. Insertion Loss Plot
amd09f.eps
A The overall insertion loss result. “PASS*/FAIL* Results” on
page 3-12 describes results marked with an asterisk.
B Horizontal and vertical magnification levels for the plot. To
change the magnification, press
KChange To Zoom; then
use
BC or AD to zoom horizontally or vertically.
C The limit line (in red) for insertion loss. The lower the
measurements fall below the limit line, the better the cabling
performance. Press L to see plots of individual pairs.
D Measured insertion loss for the cable pairs. Lower insertion
loss means better cabling performance.
E The cursor and its location on the frequency scale. When you
first view the plot, the cursor is placed at the worst margin.
Use
BC to move the cursor (if the plot is in zoom mode, press
KChange To Cursor first).
F The measured insertion loss and margin at the cursor’s
position. Margin is the difference between the measured
value and the limit. Margin is negative if the pair failed.
G The horizontal scale is the frequency range in megahertz.
The vertical scale is the insertion loss range in decibels.
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