Technical data

Oscilloscope Familiarization Labs 2
4000 X-Series Oscilloscopes Advanced Training Guide 13
At this point, you should see a repetitive digital pulse with overshoot and
ringing similar to what is shown in Figure 1. Note that all front panel
knobs are pushable. If you push the V/div knob or time/div knob, you can
toggle between course adjustment and fine adjustment (vernier control).
When other knobs are pushed, the scope will pre- set conditions associated
with that particular knob. For instance, if you push one of the vertical
position/offset knobs, offset will be set to 0.0 V for that input channel. If
you push the horizontal position/delay knob, delay relative to trigger will
be set to 0.0 seconds. If you push the trigger level knob, the scope will
automatically set the trigger level to approximately 50%.
Let’s now use the scope’s “cursors” function to measure the positive pulse
width and peak-to- peak voltage of this waveform. First, visually locate the
“Cursors” button in the Measure section of the front panel as shown in
Figure 2.
9 Push the Cursors button; then select "X1" on the right side of the
display. A pop up appears where you can increment its value (arrows)
or explicitly assign its value (press the value to make the keyboard
appear). You may also choose to drag the orange X1 flag on the bottom
edge of the screen to move the cursor to your desired position. The
cursors knob can also be used for fine tuning and adjustments.
10 Move the X1 cursor (#1 timing marker) so it intersects with a rising
edge of the pulse.
11 Select X2 on the right of the display (#2 timing marker) and position it
on the falling edge of the same pulse.
12 Select Y1 on the right of the display (#1 voltage marker) and move it
vertically such that it intersects with the negative peak of the pulse.
13 Select Y2 on the right of the display (#2 voltage marker) and move it
vertically such that it intersects with the positive peak of the pulse.
Figure 2 Measurement Cursors knob.