Operating instructions
Operating
Instructions---711387
1-
1
4
MEASURE
HORIZONTAL
DISTANCEFROM!
A
TO
B
(10%
TO
90%)
FALL
TIME
MEASURE
HORIZONTAL
DISTANCE
FROM
A
TO
B
(90%
TO
10%)
Figure 1-8
.
Measuring
the
rise
time
and
fall
time
of
a
displayed
waveform
.
8
.
Multiply
the
horizontal
distance
measured
in
step
7
by
the
TIME/DIV
switch
setting
.
(Divide
the
answer
by
10
if
sweep
magnification
is
used
.)
Example
:
Assume
that
the
horizontal
distance
from
the
10
to
90%
points
is
2
.5
divisions
and
the
TIME/DIV
switch
setting
is
.1
us (see
Fig
.
1-8)
.
Using
the formula
:
Rise
Time
Substituting
values
:
Horizontal
distance
x
TIME/DIV
(divisions)
setting
-
.
.--
Magnification
-
-,
_
.
C1985
11A
0
.
1
Rise
Time
=
2
.
:5-'`--
--
E-is
-
0
.25
microsecond
PULSE
WIDTH
MEASUREMENTS
Perform
the
following
procedure
to
measure
the
pulse
width
of
a
displayed
waveform
:
1
.
Install
the
time-base
unit
in
a
mainframe
horizontal
compartment
(either
A
or
B
Horiz
in
a
four-compartment
mainframe)
.
2
.
Connect
the
signal
to
be
measured
to
the
vertical
unit
input
.
3
.
Set
the
mainframe
horizontal-
and
vertical-mode
switches
to
display
the time
base
and
vertical
unit
.
(Check
that
the
time base
VARIABLE
(CAL
IN)
control
is
pushed
in
and
the
HOLD
OFF
control
is
in
the
MIN
position
.)
4
.
Set the
1
RIGGERING
switches
and
LEVEL
control
for
a
stable
display
(see
General
Operating
Information
for
selecting
proper
triggering)
.
5
.
Set
the
vertical
deflection
factor
and
position
control
for
about
a
5-division
pulse,
vertically
centered
on
the
graticule
.
6
.
Set the
i"IME/DIV
switch
and
POSrriON
control
for
1
complete
pulse displayed
within
the
center
8
graticule
divisions
as
shown
in
Figure
1-9
.
7
.
Measure
the
horizontal
distance
in
divisions
between
the
50%
amplitude
points
of
the
displayed pulse
(see
Fig
.
1-9)
.
8
.
Multiply
the
horizontal
distance
measured
in
step
7 by
the
TIME/DIV
switch
setting
.
(Divide
the
answer
by 10
if
sweep
magnification
is
used)
.
MEASURE
HORIZONTAL
DISTANCE
FROM
Figure
1-9
.
Measuring
the
pulse
width
of a
displayed
waveform
.
C1985-12
REV
A
MAR
1981