4. Operating Instructions
2. Select MENU → Measurement menu.
3. Select Envelope Plot submenu.
4. Toggle Envelope Plot to On.
5. Use the Fill Mode On/Off option to toggle between Fill Mode and Frequency Density display
mode.
The CT100B can monitor a trace for extended periods of time with appropriate power
management settings.
Sometimes manipulation of the cable and/or connectors of interest during Envelope Plot
monitoring will provoke an intermittent TDR fault.
Fill Mode fills in an area plot between the maximum and minimum impedance values. This is
useful to highlight the location of the fault because the fault typically creates an “arrow” that
points to the location of the fault as shown in Figure 4.35.
Figure 4.35. Envelope Plot with Fill Mode, with the active cursor positioned at the fault
location (red circle). Note that the black lines shown here to emphasize the “virtual arrow”
do not actually appear on the instrument screen.
Frequency Density mode shows the underlying TDR traces, which can be useful to determine the
fault mechanism and likelihood of occurrence as shown in Figure 4.36. Both modes provide the
range of impedance values at cursor, as shown in Figure 4.37.
CT100B TDR Cable Analyzers Operator’s Manual 69
To Next Page
Loading...