cycle
limit
is
50
p ercen
t,
and
a
v
eraging
is
o.
Under
these
conditions
the
measuremen
t
cycle
time
is
ab out
3
milliseconds
p er
trace
data
p oint
in
the
pulse
prole
domain,
or
ab out
30
milliseconds
in
the
frequency
domain.
Figure
3-20 b
sho
ws
the
same
conditions
with
a
v
eraging
on
and
an
a
v
eraging
factor
of
four.
No
w
four
measuremen
ts
are
taken
for
eac
h
data
p oint
with
the
measuremen
t
cycle
time
alternating
b et
w
een
1
millisecond
for
eac
h
of
the
measuremen
ts
required
for
the
a
v
eraging,
and
the
time
to
mov
e
to
the
next
data
p oint.
Figure
3-20 c
sho
ws
the
measuremen
t
when
2-P
ort
correction
is
On.
Here,
the
parameter
switching
time
also
aects
the
o
v
erall
PRP
and
dut
y
cycle.
Figure
3-20.
Example
Internal
Pulse
Output
PRP
and
Duty
Cycle
In
Figure
3-20 d,
the
pulse
width
is
greater
than
the
measuremen
t
cycle
time,
so
the
dut
y
cycle
could
approac
h
100
p ercen
t.
This
is
a
v
oided
b
y
setting
the
dut
y
cycle
function
to
the
maximum
v
alue
allo w
ed
in
the
measuremen
t.
When
the
com
bination
of
the
pulse
width
and
the
dut
y
cycle
limit
approac
hes
the
measuremen
t
cycle
time,
the
pulse
o
part
of
the
measuremen
t
cycle
time
is
increased
to
satisfy
the
dut
y
cycle
limit.
If
y
ou
are
viewing
this
with
an
oscilloscop
e,
notice
ho
w
the
measuremen
t
cycle
time
v
aries
according
to
the
pulse
prole
stop
time.
If
the
stop
time
is
greater
than
the
pulse
width,
the
measuremen
t
cycle
time
will
extend
past
the
end
of
the
pulse
dep ending
up on
the
time
v
alue
of
the
data
p oint
b eing
measured.
Dep ending
up on
the
pulse
width,
this
can
result
in
a
low
er
p ercen
t
dut
y
cycle
tow
ard
the
end
of
the
time
span.
External
Trigger
and
Stop
Sw
eep
Signals
Figure
3-21
sho
ws
the
relationship
b et
w
een
the
external
T
rigger
Input
and
the
HP
8510
Stop
Sw
eep
output
for
frequency
domain
p oint-in-pulse
measuremen
ts
and
for
pulse
prole
domain
measuremen
ts.
F
or
external
triggering,
Stop
Sw
eep
remains
Busy
(low)
un
til
the
measuremen
t
Operation
3-25
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