Measurement Cycle Times
1ms Next Average
4to 8ms Next Parameter
30 to 40 ms Next Frequency Point
(Frequency Domain)
3-4 ms Next Time Point
(Pulse Prole Domain)
Measurement Cycle Time
Con
trols
that
can
eect
the
measurement
cycle time
are:
Sw
eep
Time.
When
the
analyzer
is
otherwise
ready
for
the
next
measuremen
t
cycle,
it
ignores
triggering
for
an
in
terv
al
equal
to
(Sw
eep
Time
(ms)/Numb
er of
P
oin
ts).
Pulse
Width.
The
pulse
alw
a
ys
remains
On
for
the
user-sp
ecied
time.
Duty
Cycle
Limit.
When
the
analyzer
is
otherwise
ready
for
the
next
measuremen
t
cycle,
if
the
dut
y
cycle
p
ercen
t
maxim
um
limit
w
ould b
e
exceeded,
the
pro
cess
ignores
triggering
un
til
the
dut
y
cycle
limit is
satised.
Pulse
Profile
Domain
Stop
Time.
The time
v
alue
of
the
curren
t
pulse
prole
data
p
oin
t
determines the
measuremen
t
cycle
time
when
it
is
greater
than
the
PRP
set
b
y
the
dut
y
cycle
limit.
Frequency
Domain
Trigger
Dela
y
.
If
the
frequency
domain
trigger
dela
y
is
greater
than
the
dut
y
cycle
limit,
trigger
dela
y
will
con
trol the
minimum
frequency domain
measurement
cycle
time.
Additional considerations are:
Pulse Output is set to the active level during measurementof any calibration standard.
Pulse
Output is
set
to
the
inactiv
e
lev
el
during
the
sw
eep retrace.
Pulse
Output
is
set
to
the
active
lev
el
for
less
than
30
microseconds
immediately
prior
to
the beginning of the sw
eep for the automatic p erio dic IF calibration sequence.
Pulse Output remains at the inactiv
e lev
el under all conditions when External T
riggering is
selected.
The automatic perio dic IF calibration sequence is transparen
t to the operator except for the
less than 30 microsecond pulse output immediately prior to the b eginning of a sweep. Tothe
operator, the IF calibration sequence will appear to o ccur at random times, more frequently
just
after
the
HP
8510
is
turned
on, then
less
often
as
the
system
temp
erature
stabilizes.
General
Timing
Information
8-3
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