Fluke DTX Series - Page 99

Certifying Twisted Pair Cabling
Twisted Pair Autotest Results 3
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A The location of the return loss results. Press J to switch
between the tester and smart remote.
B The overall return loss result. “PASS*/FAIL* Results” on
page 3-12 describes results marked with an asterisk.
C Magnification level for the plot. Use AD to zoom
in or out at the cursor’s location.
D Measured return loss for the cable pairs. Higher return loss
means better cabling performance.
E The limit line (in red) for return loss. The higher the
measurements rise above the limit line, the better the
cabling performance. Press
L to see plots of individual
pairs.
F 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.
G The measured return 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.
H The horizontal scale is the frequency range in megahertz.
The vertical scale is the return loss range in decibels.
Figure 3-19. Return Loss Plot