HP 8753D - Page 283

Sweep Time
The
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SWEEP
TIME softkey
selects sweep
time as
the
active
entry
and
shows
whether
the
automatic
or
manual
mode is
active.
The following
explains the
dierence between
automatic
and
manual
sweep
time:
Manual
sweep
time
.
As
long as
the selected
sweep speed
is within
the
capability
of
the
instrument,
it
will
remain
xed,
regardless of
changes to
other measurement
parameters.
If
you
change
measurement
parameters such
that the
instrument can
no
longer
maintain
the
selected
sweep
time
, the
analyzer will
change to
the
fastest
sweep
time
possible
.
A
uto
sweep
time.
Auto
sweep time
continuously
maintains
the
fastest
sweep
speed
possible
with
the
selected
measurement parameters
.
Sweep
time refers
only to
the time
that
the
instrument
is
sweeping
and
taking
data,
and
does
not include
the time
required for
internal
processing
of
the
data,
retrace
time
,
or
bandswitching
time.
A sweep
speed indicator
"
is
displayed
on
the
trace
for
sweep
times
longer
than
1.0 second.
For
sweep times
faster
than
1.0
second
the
"
indicator
appears
in
the
status
notations
area at
the left
of
the
analyzer's
display
.
Manual
Sweep
Time
Mode
When
this
mode
is
active
,
the
softkey
label
reads
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SWEEP
TIME
[MANUAL]
.
This
mode
is
engaged
whenever
you
enter
a
sweep time
greater than
zero
.
This
mode
allows
you
to
select
a
xed
sweep
time
.
If
you change
the measurement
parameters
such
that
the
current
sweep
time
is
no
longer
possible
,
the
analyzer
will
automatically
increase
to
the
next
fastest
sweep
time
possible
.
If
the
measurement
parameters
are
changed
such
that
a
faster
sweep
time
is
possible
,
the analyzer
will
not
alter
the
sweep
time
while
in
this
mode
.
Auto
Sweep
Time
Mode
When
this
mode
is
active
,
the
softkey
label
reads
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SWEEP
TIME
[AUTO]
.
This
mode
is
engaged
whenever
you
enter
4
0
5
4
x1
5
as
a
sweep
time
.
A
uto
sweep
time
continuously maintains
the
fastest
sweep
time
possible
with
the
selected
measurement
parameters.
Minimum
Sweep
Time
The
minimum
sweep
time
is
dependent
on
the
following
measurement parameters:
the
number
of
points
selected
IF bandwidth
sweep-to-sweep averaging in dual channel display mode
error-correction
type of sweep
In addition to the parameters listed
above, the actual
cycle time
of the analyzer is also
dependent on the following measurement parameters:
smoothing
limit test
trace math
marker statistics
6-16 Application and Operation Concepts