58 Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide2 Horizontal ControlsTo position the time reference (left, center, right)Time reference is the reference point on the display for delay time (horizontalposition).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 left edge of thedisplay.• Center — the time reference is set to the center of the display.• Right — the time reference is set to one major division from the right edge ofthe display.A small hollow triangle (∇) at the top of the display grid marks the position of thetime reference. When delay time is set to zero, the trigger point indicator (▼)overlays the time reference indicator.The time reference position sets the initial position of the trigger event withinacquisition memory and on the display, with delay set to 0.Turning the Horizontal scale (sweep speed) knob expands or contracts thewaveform about the time reference point (∇). See "To adjust the horizontal(time/div) scale" on page 50.Turning the Horizontal position ( ) knob in Normal mode (not Zoom) moves thetrigger point indicator (▼) to the left or right of the time reference point (∇). See"To adjust the horizontal delay (position)" on page 51.Searching for EventsYou can use the [Search] key and menu to search for Edge, Pulse Width, Rise/FallTime, Runt, and Serial events on the analog channels.Setting up searches (see "To set up searches" on page 59) is similar to setting uptriggers. In fact, except for Serial events, you can copy search setups to triggersetups and vice-versa (see "To copy search setups" on page 59).Searches are different than triggers in that they use the measurement thresholdsettings instead of trigger levels.
