78 Keysight N9915-90020 User’s Guide
TDR (Time Domain Reflectometry) - Option 215
TDR Measurement Settings
TDR Measurement Settings
Select CAT Mode, then TDR before making any setting in this chapter.
How to select CAT Mode
—Press Mode
.
—Then
CAT/TDR.
TDR Measurement (Format)
You can select from 3 different TDR Formats.
—Press Measure 1
—Then
More.
— Then choose from:
—
TDR (Lin rho) The Y-axis of the display is linear, real, unitless values.
A trace without reflections shows as 0 (zero). Maximum reflections
from an open or short show as 1.
—
TDR (ohm) The Y-axis of the display is impedance (ohms).m
—
DTF (Lin) The Y-axis of the display is linear, real, unitless values.
X-Axis displays distance to fault in meters.
— TDR & DTF TDR and DTF are displayed.
TDR Settings Table
You can set and view all of the TDR settings, including some calculated values,
on the TDR Settings table. Learn more in
“Calculated TDR values” on page 85.
How to make settings on the TDR settings table
—Press Meas Setup 4
.
—Then
Settings.
—Press
Next Page and Previous Page to view all settings.
— To change a setting:
— Use the arrows or rotary knob to highlight a setting.
— Numeric settings can be changed by pressing numbers using the
numeric keypad. Then press Enter or select a suffix if available.
— Other settings require you to press
Edit
, then press a softkey to
change the value.
— When finished changing a value, press
Done Edit
.
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