Fluke DTX-1800 Technical Reference Handbook page 109

1
8
7
A
The location of the NEXT results. Press
between the tester and smart remote.
2
B
The overall NEXT result. "PASS*/FAIL* Results" on page 3-12
describes results marked with an asterisk.
3
C
Horizontal and vertical magnification levels for the plot. To
change the magnification, press
4
BC AD
use or
5
D
Measured NEXT for the cable pairs. Higher NEXT means
better cabling performance.
6
E
The limit line (in red) for NEXT. The higher the measurements
rise above the limit line, the better the cabling performance.
If the line is black, NEXT is not evaluated at those frequencies.
See page 3-13. Press
F
The cursor and its location on the frequency scale. When you
first view the plot, the cursor is placed at the worst margin.
BC
Use to move the cursor (if the plot is in zoom mode,
K
press Change To Cursor first).
amd07f.eps
G
The measured NEXT 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 NEXT range in decibels.
Figure 3-17. NEXT Plot
Certifying Twisted Pair Cabling
Twisted Pair Autotest Results
J
to switch
K
Change To Zoom; then
to zoom horizontally or vertically.
L
to see plots of individual pairs.
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