4. Operating Instructions
User Configurations can reduce operator error when configuring the TDR to make important
measurements. For this reason it is recommended that User Configurations be used when setting
up the CT100B for important measurements, such as quality-control checks on a cable
manufacturing line.
If a configuration named DEFAULT is saved, that configuration can be easily loaded from the
startup screens.
4.10.1. Save Configurations
1. Press the FILE button. The File menu appears.
2. Select the Config Entries menu item. The User Configurations library is displayed.
3. Select Add New to add a new User Configuration. The CT100B will prompt you for a
configuration name and will save the current instrument configuration when you press OK.
See Section 3.10.1 for information on using the Keyboard menu.
Note: If planning on using a barcode reader to load configurations, avoid using any punctuation
or special characters such as ! @ # $ % ˆ & * () in configuration names. Keep configuration names
to one or two words.
4.10.2. Load Configurations
1. Press the FILE button. The File menu appears.
2. Select the Config Entries menu item. The User Configurations library is displayed.
3. Scroll through saved configurations with the M-FUNCTION knob.
4. Press Select to load the highlighted configuration. All settings saved in that configuration are
automatically restored. Measurements and traces are updated to reflect the new Vp, cursor
position, and other applicable settings.
Configurations can also be loaded or reset by pressing the AUTOFIT/HELP button, choosing
Reset Options, and selecting one of the choices listed. See Section 3.9.4 for more information on the
Reset Options menu.
4.10.2.1. Load Configurations With a Barcode Reader
Configurations can be loaded using a barcode reader. Create a barcode that begins with a back
quote character (`) then the name of the configuration follwed by the tilde character (~). For
example, `standard~ would be the barcode for a configuration named standard on the CT100B.
4.11. Mask Testing
The CT100B is capable of performing mask testing on the currently displayed live TDR trace. The
mask creates an area around a scanned trace that functions as a test limit for the live TDR trace.
Any point of the trace that extends into the masked area will cause the background to turn red.
This can be used for creating acceptance criteria for cables and connectors. See Figure 4.33 and
Figure 4.34 for examples of traces passing and failing a mask test.
CT100B TDR Cable Analyzers Operator’s Manual 65
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