Specifications

total
deflection
factor
in
the ADD
mode is
equal to
the
deflection
factor
indicated by
either
VOLTS/DlV switch
(when
both
VOLTS/DIV
switches
are set
to
the
same
position
factor). A common
use for
the ADD
mode is
to
provide
a
dc offset
for
a signal
riding on a dc
level.
The
following
general
precautions
should
be observed
when
using
the ADD
mode:
1.
Do
not exceed the
input
voltage rating of the
oscilloscope.
2. Do
not
apply
signals
that
exceed the
equivalent
of
about
eight times the
VOLTS/DlV switch
settings,
since
large
voltages may distort
the
display.
For
example,
with a VOLTS/DlV
switch
setting
of 0.5,
the
voltage applied
to that
channel
should
not exceed
about
four
volts.
EXAMPLE:
Using the
graticule
center line
as
zero
volts,
the Channel
1
signal
is
on a three-division,
positive
dc
level
(see
Figure 16A).
NEGATIVE OFFSET
(A}
CHANNEL
1 SIGNAL
WITH
3
DIVISIONS
OF
POSITIVE
DC
LEVEL.
(B}
CHANNEL
2
DISPLAY
wrTH
3 DIVISIONS
OF
NEGATIVE
OFFSET.
(C}
RESULTANT
DISPLAY
465/DM-O-1
Figure
16. Algebraic
addition.
4658/DM44
Operators
@
44