114                                                                                                                     Keysight N9927-90001 User’s Guide
Time Domain – Option 010
Time Domain (Transform) Settings
— Then choose from: 
— Start
  Sets the transform start time.
— Stop
  Sets the transform stop time. 
Distance Units
When markers are present on a Time Domain trace, marker X-axis values are 
shown both in units of time (seconds) and distance. Select the units in which 
the marker distance data is presented.
Distance Units are also used when setting Time Domain Line Loss. Learn more 
in. “Distance Units” on page 114.
Choose from: m (meters), or Feet.
Window Layout
This setting is used to create additional traces, or select a new layout for traces 
that are already created, 
Choose from: x1, x2, x2H, x3H, x3, x4H.
Learn more about multi-trace configurations in “Multi-Trace Configurations” 
on page 91.
Transform Window
There are abrupt transitions in a frequency domain measurement at the start 
and stop frequencies, causing overshoot and ringing in a Time Domain 
response. The Window setting reduces the abruptness of the frequency domain 
transitions. This causes you to make a trade off in the Time Domain response. 
Zero (0) seconds is always the calibration reference plane. Negative values 
are useful if moving the reference plane.