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APPLICATIONS AS OSCILLOSCOPE
PROBE COMPENSATION
For accurate measurement, the probe should be compensat-
ed before starting measurement, as follows:
1) Connect the probe to the I N P U T jack and adjust each
control for normal
display of sweep.
should be set to 10mV/div and the probe switch to
10X.
2) Connect the probe to the C A L jack on the front panel.
Adjust S W E E P T I M E / D I V so that a f e w cycles of the
signal from C A L are displayed.
3) Adjust the probe trimmer
pensation for the waveform on the screen.
Fig. 13
TRACE ROTATION COMPENSATION
Rotation from a horizontal trace position can be cause
of measurement errors.
Adjust controls for a normal display. Set the A C - G N D - D C
switch to G N D and T R I G M O D E switch to A U T O .
Adjust the ^ P O S I T I O N control such that the trace is over
the center horizontal graduation line. If the trace appears
to be rotated from horizontal, align it with the center
graduation
line using the T R A C E
located on the front panel.
DC V O L T A G E MEASUREMENTS
T h i s procedure describes the measurement procedure for
dc waveforms.
Procedure:
1. Connect the signal to be measured to the I N P U T jack
and select the vertical M O D E to the channel to be used.
Set controls to obtain a normal display of the waveform*
to be measured. Set the V A R I A B L E control to the
C A L .
2. Select the T R I G G E R I N G M O D E switch to A U T O and
A C - G N D - D C switch to G N D , which establishes a trace
at the zero volt reference.
control, adjust the trace position to the desired reference
level position. Do not to disturb this setting once made.
APPLICATION
V O L T S / D I V
to obtain optimum com-
C o r r e c t
c o m p e n s a t i o n
E x c e s s i v e
• c o m p e n s a t i o n
I n s u f f i c i e n t
c o m p e n s a t i o n
R O T A T I O N control
Using the ^
P O S I T I O N
3. Set the A C - G N D - D C switch to D C to observe the wave-
form including its d c component.
reference level position or an inappropriate
D I V setting was made, the wave form
visible on the C R T . If so, set V O L T S / D I V and / or the
Y P O S I T I O N control once again.
4 . Use the •
P O S I T I O N control to bring the point of the
waveform to be measured to the center vertical gra-
duation line of the graticule scale.
5. Measure the vertical distance from the reference level
to the point to be measured. (The reference level can
be rechecked by momentarily returning the A C - G N D -
D C switch again to G N D ) .
Multiply the distance measured above by the V O L T S /
D I V setting to gain the voltage to be determined. When
the probe is used, also multiply the probe's attenuation
ratio.
Voltages above and below the reference level are posi-
tive and negative voltages, respectively.
Dc level = (Vertical distance in divisions) x ( V O L T S / D I V
setting) x (probe attenuation ratio)
M e a s u r i n g p o i n t a d j u s t e d t o t h e
c e n t e r v e r t i c a l s c a l e b y « • P O S I T I O N
G r o u n d p o t e n t i a l ( r e f e r e n c e l i n e )
a d j u s t e d b y *
Fig. 14
[ E X A M P L E ]
For the example shown in Fig. 14
sured is 3.8 divisions from the reference level (ground po-
tential). If V O L T S / D I V is 0 . 2 V and a 10 : 1 probe is used,
then the voltage to be determined is:
Dc level = 3.8 (div) x 0.2 ( V ) x 1 0 = 7.6V
If an inappropriate
V O L T S /
may not be
p o s i t i o n
t h e point being mea-
f
2 3
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