Press the MENU button to bring up the menu
options for the active channel. The far left option is the Couplingbutton.
AC coupling only displays the AC (or changing) components of
a wave.
We will typically use DC coupling, which displays both DC
(constant) and AC (changing) components.
The Ground coupling option shows the ground level
(0 volts) for channel 1.
When finished with the MENU: push the MENU
button, followed by the Off button.
2.2 setting the vertical sweep
The vertical SCALE knob (under the VERTICAL
heading) is used to adjust the vertical range of the oscilloscopetrace. The number next to CH1 in the lower left corner of the LCD
screen shows how many volts are represented by each horizontal lineon the screen.
Turn the SCALE knob and note that the highlighted value
changes. (To determine the amplitude of a signal, it is necessaryto know how many volts each division represents.)
Adjust the VERTICAL POSITION knob to move the entire trace up
and down. The number 1 and the right arrow on the left side of thedisplay indicate the ground level for channel 1.
Oscilloscope adjustments
2.3 setting the horizontal sweep (refer to figure 1)
The SCALE knob under the HORIZONTAL heading is
used to set the horizontal sweep speed.
Turn this SCALE knob and observe how it changes the
appearance of the signal on the o-scope.
The number of seconds (usually milliseconds or microseconds)
between each vertical line on the LCD screen is shown at the bottomcenter of the screen.
The HORIZONTAL POSITION adjustment moves the
trace horizontally.
2.4 measure features (refer to figure 2)
Push the MEASURE button to bring up the MEASURE menu.
Select the Select Measurement for Ch1.
Scroll through the new menu that appears on the right side of
the screen. Measure the frequency, period, and mean value of yourinput signal. Compare these measured values with the settings of
the function generator.
Turn off the measurements you selected by
pushing the Remove Measurement button from the MEASURE menu.
Measure, Cursor, and
Save/Recall
2.5 trigger options
The Trigger makes signals appear to standstill on the screen rather than dancing all over the place. When
the signal reaches a designated trigger level, the o-scope beginsacquiring data. We will be using the Trigger MENU to adjust the
triggering of the sweep of the oscilloscope display.
2.5.1 types of triggers
Auto triggering:the scope will free-run in the absence of an
adequate trigger signal. Useful for capturing periodicsignals.
Normal triggering: In the absence of an adequate trigger, no
baseline trace will be present. Useful for capturing periodicsignals.
Single triggering: A single sweep is displayed when an
acceptable trigger is detected. Useful for capturing a one-timeevent.
Force triggering: Causes a trigger to occur even if there is
not a signal of adequate magnitude.
Triggering Options
2.5.2 adjusting the trigger
The TRIGGER LEVEL knob selects the amplitude of the trigger
level. This value is indicated by a left arrow on the right side ofthe display.
Bring up the trigger menu options by selecting the TRIGGER
MENU button.
