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3. ELIMINATION OF UNDESIRED SIGNAL COM-
PONENTS
The A D D mode eliminates undesired signal components and
displays necessary components only. (See Fig. 2 9 . )
1)
Apply the signal containing an undesired component to
the C H 1 input connector and the undesired component
itself to the C H 2 input connector.
2)
Select C H O P of the V E R T I C A L MODE s w i t c h e s and set
the A S O U R C E s w i t c h to C H 2 . Make sure that channel
2 represents the envelop of the undesired signal in the
reverse polarity. If necessary, reverse the polarity by
selecting C H 2 INV.
3)
Select A D D of the V E R T I C A L MODE s w i t c h e s and set
the A S O U R C E s w i t c h to C H 1 . Adjust the C H 2
V O L T S / D I V and V A R I A B L E controls so that undesired
signal component is minimized. Necessary components
to be observed remain displayed on the C R T .
S i g n a l c o n t a i n i n g u n d e s i r e d c o m p o n e n t
( D o t t e d l i n e s i n d i c a t e e n v e l o p o f u n d e s i r e d c o m p o n e n t )
U n d e s i r e d s i g n a l c o m p o n e n t
N e c e s s a r y s i g n a l f r e e o f u n n e c e s s a r y c o m p o n e n t
28
Fig. 2 9
4. CURSOR MEASUREMENT OF VOLTAGE
RATIO
The following describes measurement of overshoot of
square w a v e s , etc.
1)
Apply the signal to be measured to the INPUT connec-
tor. Select the channel to be used w i t h the V E R T I C A L
MODE, set the A C - D C to D C , deactivate the GND
s w i t c h , and adjust controls for normal s w e e p display.
T h e n , adjust the V O L T S / D I V and S W E E P T I M E / D I V to
obtain proper w a v e f o r m display.
2)
Use the vertical axis V A R I A B L E control and the t PO-
SITION control, if necessary, to adjust amplitude to 5
divisions (i.e., 0 % and 1 0 0 % graduations) on the C R T .
NOTE: Voltage ratio can be measured if the vertical axis
V A R I A B L E control is not set to the C A L position.
3)
Select a desired cursor mode AVI or AV2 according to
a channel to be used.
NOTE: Voltage ratio cursor measurement is impossible
if C H 3 or C H 4 is selected.
4)
Align the AREF cursor to the 1 0 0 % graduation.
5)
Align the z\cursor to an overshoot point to be measured.
6)
Voltage ratio of the overshoot supposing 5 divisions as
1 0 0 % is displayed in percentage following RATIO in the
upper right of the C R T .
R E F
c u r s o r
Fig. 30
5. TIME MEASUREMENT
(1) Normal Procedures
The following describes normal procedures for measuring
time between t w o points on a w a v e f o r m . Calculation is
based on the S W E E P T I M E / D I V setting and the horizontal
distance between the t w o points.
1)
Apply the signal to be measured to the INPUT connec-
tor. Select the channel to be used with the V E R T I C A L
MODE, set the A C / D C to D C , deactivate the GND
s w i t c h , and adjust controls for normal s w e e p display.
T h e n , adjust the V O L T S / D I V and S W E E P T I M E / D I V to
obtain proper w a v e f o r m display. Set the V A R I A B L E of
each channel and S W E E P T I M E to the C A L condition.
2)
Align one of the points to a vertical graduation line with
the
• POSITION control. T h e n , align another point
to the center horizontal graduation line with the • PO-
SITION control.
3)
Measure the horizontal distance between these t w o
points. Multiply this distance by setting of the S W E E P
T I M E / D I V control.
Time = Horizontal distance (div)
x S W E E P T I M E / D I V setting
c u r s o r
M e a s u r e d v a l u e
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