User`s guide

Front-Panel Controls 2
5000 Series Oscilloscope User’s Guide 67
• When the horizontal mode is set to Zoom, the horizontal
position knob controls the position of the Zoom sweep
window inside the main sweep display. This delay value is
independent of sampling interval and sweep speed.
Changing the delay does not affect the position of the main
window.
5 Turn the horizontal position knob ( ) and notice that its
value is displayed in the status line.
The horizontal position knob moves the main sweep
horizontally, and it pauses at 0.00 s, mimicking a mechanical
detent. Changing the horizontal position 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 (horizontal position) set
to 400 µs. The delay time number tells you how far the time
reference point is located from the trigger point. When delay
time (horizontal position) 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, and these events are called pre-trigger
information. You will find this feature very useful because
you can now see the events that led up to the trigger point.
Everything to the right of the trigger point is called
post-trigger information. The amount of delay range
(pre-trigger and post-trigger information) available depends
on the sweep speed selected and memory depth.
Zoom mode
Zoom sweep is an expanded version of main sweep. When Zoom
mode is selected, the display divides in half and the Zoom
sweep icon displays in the middle of the line at the top of the
display. The top half of the display shows the main sweep and
the bottom half displays the Zoom sweep.