Horizontal Controls 2Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide 57The area of the normal display that is expanded is outlined with a box and the restof the normal display is ghosted. The box shows the portion of the normal sweepthat is expanded in the lower half.To change the time/div for the Zoom window, turn the horizontal scale (sweepspeed) knob. As you turn the knob, the zoomed window time/div is highlighted inthe status line above the waveform display area. The Horizontal scale (sweepspeed) knob controls the size of the box.The Horizontal position (delay time) knob sets the left-to-right position of thezoom window. The delay value, which is the time displayed relative to the triggerpoint) is momentarily displayed in the upper-right portion of the display when thedelay time ( ) knob is turned.Negative delay values indicate you're looking at a portion of the waveform beforethe trigger event, and positive values indicate you're looking at the waveform afterthe trigger event.To change the time/div of the normal window, turn off Zoom; then, turn thehorizontal scale (sweep speed) knob.For information about using zoom mode for measurements, refer to "To isolate apulse for Top measurement" on page 220 and "To isolate an event for frequencymeasurement" on page 226.To change the horizontal scale knob's coarse/fine adjustmentsetting1 Push the horizontal scale knob (or press [Horiz] > Fine) to toggle between fineand coarse adjustment of the horizontal scale.When Fine is enabled, turning the horizontal scale knob changes the time/div(displayed in the status line at the top of the display) in smaller increments. Thetime/div remains fully calibrated when Fine is on.When Fine is turned off, the Horizontal scale knob changes the time/div setting ina 1-2-5 step sequence.
