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M E A S U R E M E N T O F T H E V O L T A G E
B E T W E E N T W O P O I N T S O N A W A V E F O R M
T h i s procedure may be used to measure peak-to peak vol-
tages, or for measuring the voltage difference between any
t w o points on a waveform.
Procedure:
1. Apply the signal to be measured to the INPUT jack, s e -
lect the vertical M O D E to the channel to be used and
set the A C - G N D - D C s w i t c h to A C , adjusting V O L T S /
DIV and S W E E P T I M E / D I V controls for a normal dis-
play. Set the V A R I A B L E control to C A L
2. Using the ^ POSITION control adjust the waveform po-
sition s u c h that one of the t w o points falls on a major
graduation line.
3. Using the
POSITION control, adjust the second
point to coincide with the center vertical graduation
line.
4. Measure the vertical distance between the t w o points
and multiply the number of divisions by the setting of
the V O L T S / D I V control.
If a probe is used, further multiply this by the probe at-
tenuation ratio, if any and i f ' x 5 G A I N " is used, multiply
the value by 1 / 5 as well.
Using the formula:
Volts Peak-to-Peak
= Vertical distance (div) x ( V O L T S / D I V setting)
x (probe attenuation ratio) x " x 5 G A I N " value"
A d j u s t t o the center
vertical s c a l e w i t h O
P O S I T I O N .
Fig. 10
[ E X A M P L E ]
For the example s h o w n in Fig 10, the t w o points are s e p a -
rated by 4 . 4 divisions vertically. Let the V O L T S / D I V set-
ting be 0 . 2 V / d i v and the probe attenuation be 1 0 : 1 .
Substituting the given value:
Voltage between t w o points = 4.4 (div) x 0.2 (V) x 1 0
A P P L I C A T I O N
( 1 / 5 )
1
Points to be m e a s u r e d
A d j u s t t o the horizontal s c a l e
w i t h * P O S I T I O N
= 8.8V
E L I M I N A T I O N O F U N D E S I R E D S I G N A L
C O M P O N E N T S
The A D D feature can be conveniently used to cancel out
the effect of an undesired signal component w h i c h is sup-
erimposed on the signal you w i s h to observe.
Procedure:
1. Apply the signal containing an undesired component to
the channel 1 INPUT jack and the undesired signal itself
alone to the channel 2 INPUT jack.
2. Select the vertical M O D E s w i t c h to D U A L (CHOP) and
S O U R C E s w i t c h to C H 2 . Verify that channel 2 repre-
sents the unwanted signal in reverse polarity. If n e c e s -
sary, reverse polarity by setting C H 2 to INV.
3. Select the vertical M O D E s w i t c h to A D D , S O U R C E
s w i t c h to V MODE and C H 2 V O L T S / D I V and V A R I A B L E
controls so that the undesired signal component is c a n -
celled a s much a s possible.
should be the signal you w i s h to observe alone and free
of the unwanted signal.
S i g n a l containing undesired c o m p o n e n t
(Broken lines: undesired c o m p o n e n t envelope)
Undesired c o m p o n e n t signal
T h e remaining
signal
19
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