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Chapter 3
Structured Cable Field Calibration and Testing
3-19
Layout and Controls
The horizontal axis represents frequency data and the vertical axis represents the
measured values in dB, with limits indicated as a solid line trace.
Tabular View Graphic View
Figure 3-9: Autotest Tabular Data and Graphic View Layout
Note: The margin data at the bottom right of the Tabular screen represents the worst
case difference between the actual measured data and the predefined limit threshold
as shown by the cursor position in the graph on the right.
Table 3-5: Autotest Graph View Layout and Controls
Item Function
1 Wire pair plotted from tabular data.
2 The horizontal axis represents frequency data.
3 The vertical axis represents measurements in dB.
4 When a wire pair graph is first displayed, the cursor is automatically positioned at
the worst case limit and frequency point.
5 Actual data plot for a wire pair. Attenuation is plotted in this example.
6 Predefined worst case limit plot for attenuation.
7 Predefined worst case limit plot for NEXT.
8 Actual data plot for a wire pair. NEXT is plotted in this example.
9 Expands or compresses the horizontal axis of the graph. At full magnification, these
keys become inactive.
10 Arrow keys are used to move the cursor horizontally. As the cursor moves, screen
readouts will change to reflect cursor position.
- Use the soft keys to move the cursor in large steps.
- Use the key pad keys to move the cursor in small steps.
- Hold the SHIFT key while using the ARROW keys to make large cursor steps.
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