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MEASUREMENT OF THE VOLTAGE BETWEEN TWO
POINTS ON A WAVEFORM
This technique can be used to measure
voltages.
Procedure:
1 . Apply the signal to be measured to the INPUT jack. Set
the vertical MODE to the channel to be used. Set the
AC-GND-DC switch to A C , adjusting VOLTS/DIV and
SWEEP TIME/DIV controls for a normal display. Set the
VARIABLE control to C A L position.
2. Using the •
POSITION control, adjust the
position such that one of the two points falls on a C R T
graduation line and that the other is visible on the
display screen.
3. Using the
POSITION control, adjust the second
point to coincide with the center vertical graduation line.
4. Measure the vertical distance between the two points
and multiply this by the setting of the VOLTS/DIV con-
' x 5 G A I N " has been set, multiply the value by
trol. If
J
1/5 as well.
If a probe is used, further multiply this by the attenua-
tion ratio.
Using the formula:
Volts Peak-to-Peak
= Vertical distance (div) x (VOLTS/DIV setting) x (probe
attenuation ratio) x " x 5 G A I N " value
Adjust to the center
vertical scale with
POSITION.
[EXAMPLE]
For the example, the two points are separated by 4.4 divi-
sions vertically. Set the VOLTS/DIV setting be 0.2 V/div
and the probe attenuation be 1 0 : 1 . (See Fig. 13)
Substituting the given value:
Voltage between t w o points=4.4 (div) x 0.2(V) x 10 = 8.8V
18
peak-to-peak
waveform
_ l
( 1 / 5 )
Points to be measured
. Adjust to the horizontal
scale with *
POSITION.
Fig. 13
ELIMINATION OF UNDESIRED SIGNAL
COMPONENTS
The ADD feature can be conveniently used to cancel out
the effect of an undesired signal component which may be
superimposed on the signal you wish to observe. (See Fig.
14)
Procedure:
1. Apply the signal containing an undesired component to
the channel 1 INPUT jack and the undesired signal itself
alone to the channal 2 INPUT jack.
2. Set the vertical MODE switch to CHOP and SOURCE to
C H 2 . Verify that CH2 represents the unwanted signal in
reverse polarity. If necessary reverse polarity by setting
CH2 INV push button.
3. Set the vertical MODE to ADD, SOURCE to V. MODE
and channal 2 VOLTS/DIV and VARIABLE controls so
that the undesired signal component is cancelled as
much as possible. The remaining signal should be the
signal you wish to observe alone and free of the un-
wanted signal.
Signal containing undesired component
(Broken lines: undesired component envelope)
Undesired component signal
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