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4.
Use the Horizontal POSITION control (10) to position one of the positive peaks on the central
vertical gratitude line. This line has additional calibration marks equal to 0.2 major division each.
5.
Count the numer of division from the gratitude line touching the negative signal peaks to the
intersection of the positive signal peak with the central vertical gratitude line. Multiply this number
by the VOLTS/DIV
example, if the VOLTS/DIV switch were set to 2 V, the waveform shown in Figure 2-5 would be
8.0 V
(4.0 div x 2 V).
pp
6.
If x 5 vertical magnification is used, divide the step 5 voltage by 5 to get the correct p-p voltage.
However if 10 x attenuator probes are used, multiply the voltage by 10 to get the correct p-p
voltage.
7.
If measuring a sine wave below 100 Hz, or a rectangualar wave below 1000 Hz, flip the
AC/GND/DC switch to DC.
Caution: Make certain the waveform is not riding on a higher-amplitude DC voltage.
Fig. 2.5: Peak-To-Peak Voltage Measurement
Instantaneous Voltages:
To measure instantaneous voltage, proceed as follows:
1.
Set up the scope for the vertical mode desired per the instructions in 2.3 BASIC OPERATING
PROCEDURES.
2.
Adjust the TIME/DIV switch (15) for one complete cycle of waveform and set the VOLTS/DIV
switch for a trace amplitude of 4 to 6 divisions (see Figure 2.6)
3.
Flip the AC/GND/DC switch (25) or (21) to GND.
4.
Use the appropriate Vertical POSITION control (4) or (7) to set the baseline on the central
horizontal gratitude line. However, if you know the signal voltage is wholly positive, use the
bottommost gratitude line. If you know the signal voltage is wholly negative, use the uppermost
gratitude line.
5.
Flip the AC/GND/DC switch to DC. The polarity of all points above the ground reference line is
positive; all points below the ground-reference line are negative.
Caution: Make certain the waveform is not riding on a high-amplitude DC voltage before flipping
the AC/GND/DC switch.
6.
Use the horizontal POSITION control (10) to position any point of interest on the central vertical
gratitude line. This line has additional calibration marks equal to 0.2 major division each. The
voltage relative to ground at any point selected is equal to the number of divisions from that point
to the ground reference line multiplied by the VOLTS/DIV setting. In the example used for figure
2-6, the voltage for a 0.5 V/div scale is 2.5 V (5.0 div x 5 V).
switch setting to get the peak-to-peak voltage of the waveform. For
Fig. 2.6: Instantaneous Voltage Measurements
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