Specifications

the baseline to the bottom
graticule
line. lf
a
negative
voltage
is
to be
measured,
position
the baseline to
the
top
graticule
line.
4. Switch the
AC-GND-DC switch to
DC. Measure
the
divisions of
vertical
deflection
between the reference
line
and the
desired
point
on the
waveform
(see
Figure
15).
EGATIVE
REFERENCE LINE
Also include
the
attenuation
factor
of the
probe
being
used,
if it
is not
a 10X
scale-factor-switching
probe.
EXAMPLE:
The vertical
distance measured
is
4.6
divisions
(see
Figure
15).
The
waveform is
above the
reference
line,
and the VOLTS/DIV
switch is
set to
2.
Substituting
the
given
values:
lnstantaneous
Voltage
=
4.6 X
(+11
X
2 V
=
+9.2
volts.
ALGEBRAIC ADDITION
with
the VERT MoDE
switch
in
the
ADD
position,
the
waveform
displayed is
the algebraic
sum of the
signals
applied to the
Channel 1 and
Channel 2 inputs
(CH
1
+
CH
2l.. lf
the
Channel 2
INVERT
switch is
de.pressed,
the
waveform displayed is
the difference
of the signals
applied
to
the
Channel
1
and Channel
2 inputs
(CH
1
-
CH 2). The
5. Calculate instantaneous
voltage,
formula:
lnstan-
vertical
taneous=distanceXPolarltY
Voltage
(oivisions)
(+
or
-)
I
using
the
following
VO
LTS/D IV
X
switch
setting
@
Figure
15.
lnstantaneous voltage
measurement.
4658/DM44
Operators
43