Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide

2 Horizontal ControlsNegative delay values indicate you're looking at a portion of the waveformbefore the trigger event, and positive values indicate you're looking at thewaveform after the trigger event.To change the time/div of the normal window, turn off Zoom; then, turnthe horizontal scale (sweep speed) knob.For information about using zoom mode for measurements, refer to “Toisolate a pulse for Top measurement" on page 169 and “To isolate anevent for frequency measurement" on page 176.To change the horizontal scale knob's coarse/fine adjustment setting1 Push the horizontal scale knob (or press [Horiz] > Fine) to toggle betweenfine and coarse adjustment of the horizontal scale.When Fine is enabled, turning the horizontal scale knob changes thetime/div (displayed in the status line at the top of the display) in smallerincrements. The time/div remains fully calibrated when Fine is on.When Fine is turned off, the Horizontal scale knob changes the time/divsetting in a 1- 2- 5 step sequence.To position the time reference (left, center, right)Time reference is the reference point on the display for delay time(horizontal position).1 Press [Horiz].2 In the Horizontal Menu, press Time Ref; then, select:• Left — the time reference is set to one major division from the leftedge of the display.• Center — the time reference is set to the center of the display.• Right — the time reference is set to one major division from the rightedge of the display.A small hollow triangle () at the top of the display grid marks theposition of the time reference. When delay time is set to zero, the triggerpoint indicator (▼) overlays the time reference indicator.52 Agilent InfiniiVision 2000 X-Series Oscilloscopes User's Guide