Displaying Waveforms 3
InfiniiVision 7000B Series Oscilloscopes User’s Guide 63
To adjust the horizontal (time/div) scale
1 Turn the large horizontal scale (sweep speed) knob marked to
change the horizontal time/div setting.
Notice how the time/div information in the status line changes.
The symbol at the top of the display indicates the time reference point.
Note that the horizontal scale knob has a different purpose in the Zoom
display. See “To display the zoomed time base” on page 71.
The horizontal scale knob works (in the Normal time mode) while
acquisitions are running or when they are stopped. When running,
adjusting the horizontal scale knob changes the sample rate. When
stopped, adjusting the horizontal scale knob lets you zoom into acquired
data. See “Panning and Zooming Single or Stopped Acquisitions” on
page 64.
To adjust the horizontal delay (position)
1 Turn the horizontal delay (position) knob ( ).
Notice that the delay value is displayed in the status line.
The delay knob moves the normal sweep horizontally, and it pauses at
0.00 s, mimicking a mechanical detent.
Changing the delay time moves the sweep horizontally and indicates how
far the trigger point (solid inverted triangle) is from the time reference
point (hollow inverted triangle ). These reference points are indicated
along the top of the display grid.
The previous figure shows the trigger point with the delay time set to
400 s. The delay time number tells you how far the time reference point
is located from the trigger point. When delay time is set to zero, the delay
time indicator overlays the time reference indicator.
All events displayed left of the trigger point happened before the trigger
occurred. These events are called pre-trigger information, and they show
events that led up to the trigger point.
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