Operating Instructions
The ohms per unit length correction adjusts impedance and other vertical values from the
zero position out to the position endpoint. The endpoint will appear as a distinctively
colored vertical line .
The current Ohms per unit length setting now appears in the M-FUNC indicator at the top of
the screen.
6) Rotate the M-FUNCTION knob to change the setting. Use the Ohms per unit length
toggle menu option to turn the correction on or off.
Changing the Ohms/m setting will change the slope of the cable’s trace, and consequently
the impedance readings for all points on the cable’s trace and beyond. The effect and
accuracy of the Ohms per unit length value is dependent on the value for pulse velocity.
Use this correction to make more accurate impedance measurements on a length of cable.
One technique is to adjust the correction until the cable is as flat as possible. Another is to
attach a known impedance reference, such as a resistive terminator, to the cable and
adjust the Ohms per unit length correction until the measured impedance reads the correct
value.
Configurations
The CT100 allows the user to save configurations with a name. A saved configuration stores
the values of all CT100 settings. A configuration can be called up by its name, restoring all
settings to the values saved in that configuration. By default, the configuration load screen is
displayed at start up for easy loading of configurations.
Save configurations
1) Press the LIBRARY button. The Library menu appears.
2) Select the Save Config item. The CT100 will prompt you for a configuration name, then
saves the configuration. See Navigating dialog boxes on page 15 for information on
using the Keyboard menu.
Load configurations
1) Press the LIBRARY button. The Library menu appears.
2) Select the Configurations menu item. The Configurations dialog box appears.
3) An interface that lets you scroll through the configurations with the M-FUNCTION knob
is displayed.
4) Press OK on the menu when the appropriate configuration is highlighted. All settings
saved in that configuration are automatically restored. Measurements and traces are
updated to reflect the new settings.
52 Mohr CT100 / CT100HF Operator's Manual
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