p ercen
t
dut
y
cycle
pulses.
The
same
input
is
applied
to
TRIGGER
IN,
and
TRIGGERING
EXTERNAL
is
selected.
Figure
3-23.
Using
External
Trigger
and
External
Modulation
PRP
=
10
microseconds,
Duty
Cycle
=
50%
Figure
3-23a
is
the
pulse
prole
domain
resp onse.
Multiple
pulses
are
visible
b ecause
the
stop
time
is
greater
than
the
stimulus
PRP
.
Notice
that
for
external
triggering
the
minimum
start
time
is
ab out
p ositiv e
3
measuremen
t
resolution
p erio
ds
with
resp ect
to
the
external
trigger.
Ev
en
though
the
in
ternal
pulse
output
is
not
used
in
this
particular
conguration,
the
pulse
prole
measuremen
t
resolution
p erio
d
is
set
b
y
algorithm
using
the
greater
of
the
pulse
width
and
stop
time.
Figure
3-23b
is
the
frequency
domain
resp onse
with
the
trigger
dela
y
set
to
measure
during
the
On
time
of
the
pulse.
One
metho d
used
to
set
the
trigger
dela
y
to
an
appropriate
v
alue
is:
1.
Press
4
DOMAIN
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PULSE
PROFILE
,
then
set
appropriate
Start
and
Stop
times.
2.
Press
4
MARKER
5,
then
mov
e
the
marker
to
the
p oint
on
the
pulse
y
ou
w
an
t
the
frequency
domain
measuremen
t
to
b e
made.
3.
Press
4
STIMULUS
MENU
5
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER
MODE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER
DELAY
.
The
curren
t
v
alue
of
the
trigger
dela
y
will
b e
display
ed.
No
w
press
4
=MARKER
5.
The
time
v
alue
at
the
marker
will
b e
assigned
to
the
trigger
dela
y
function.
4.
Press
4
DOMAIN
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FREQUENCY
.
The
trace
sho
ws
the
resp onse
at
the
time
after
the
TTL
T
rigger
In
signal
falling
edge
as
set
b
y
the
trigger
dela
y
v
alue.
3-28
Operation
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