The value in the X to 0 field can be changed by changing the Trig to X or Trig to 0 values, or by changing the X to 0 value from the pop-up. The knob entry pop-up will appear when you select the X to 0 field. When the time value of X to 0 is changed using the knob, half the difference of the new value and old value is subtracted from the X marker and half is added to the 0 marker. Trig to X Field The Trig to X field is located in the middle of the middle row of fields. The X marker is shown on the waveform display as a dotted line with an X above it. The time displayed in the Trig to X field is measured from the trigger point to the X marker. The trigger point is marked with a dotted line on the waveform display and is always time 0. When the Trig to X field is selected, the time value can be changed by turning the knob or by entering a time value from the Numeric Entry pop-up. The Numeric Entry pop-up will appear when any key is touched on the keypad. Resolution for the Trig to X time values is 2% of the sweep speed setting. The default value for the Trig to X field is 0 s. Trig to 0 Field The Trig to 0 field is located on the right side of the middle row of fields. The 0 marker is shown on the waveform display as a dotted line with an 0 above it. The time displayed in the Trig to 0 field is measured from the trigger point to the 0 marker. When the Trig to 0 field is selected, the time value can be changed by turning the knob or by entering a time value from the Numeric Entry pop-up. The pop-up will appear when any key is touched on the keypad. Resolution for Trig to 0 time values is 2% of the sweep speed setting. The default value for the Trig to 0 field is 0 s.