Specifications

PULSE JITTER
Pulse
jitter
is
displayed
as
the slight
horizontal move-
ment of a
pulse
and
includes
the
inherent
jitter
of
the
delayed
sweep.
1. Obtain
a Normal Sweep
Display
(refer
to Basic
Oscilloscope
Displays section of this
manual).
Ensure
that the
vAR TIME/DlV
switch
is in
the
calibrated
detent.
2. Set the
B
TIME/DIV switch to
intensify
the
full
rising
portion
of the
pulse.
3.
SEt thE
HORIZ
DISPLAY
SWitCh tO
B DLY'D.
4. Referring
to
Figure
23,
measure the distance
between
Point
A and
Point
B
in divisions and
calculate
the
pulse
jitter
time
using the
following
formula:
Pulse
horizontal B
TIME/DIV
Jitter =
differenceX switch
Time
(divisions)
setting
MEASURE
TIME
FROM
ATOB
I
7
38-34
JITTER
Figure
23.
Pulse
jitter.
DELAYED
SWEEP
MAGNIFICATION
USING
ALT
SWEEP
DISPLAY
The delayed sweep
features
of the
4658
can be
used
to
provide
higher apparent
magnification
than
is
provided
by
@
4658/DM44
Operators
55