Certifying Twisted Pair Cabling
Twisted Pair Autotest Results 3
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amd09f.eps
A The overall insertion loss result. “PASS*/FAIL* Results” on
page 3-12 describes results marked with an asterisk.
B Magnification level for the plot. Use AD to zoom
in or out at the cursor’s location.
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.
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.
Figure 3-13. Insertion Loss Plot
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