HP 8753D - Page 291

Edit
subsweep menu
Using the
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EDIT or
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ADD softkey
within the
edit list
menu will
display the
edit
subsweep
menu.
This
menu
lets
you
select
measurement
frequencies arbitrarily
.Using
this menu
it is
possible to
dene
the
exact
frequencies
to
be
measured on
a point-by-point
basis.
For
example the
sweep
could
include
100
points
in
a
narrow passband,
100 points
across a
broad stop
band, and
50
points
across
the
third
harmonic
response
.
The
total sweep
is dened
with a
list of
subsweeps
.
The
frequency
subsweeps
,
or
segments
,can
be dened
in any
of
the
following
terms:
start/stop/number
of
points
start/stop/step
center/span/number
of
points
center/span/step
CW
frequency
The
subsweeps
can overlap
, and
do not
have to
be
entered
in
any
particular
order
.
The
analyzer sorts
the segments
automatically
and
lists
them
on
the
display
in
order
of
increasing
start
frequency
,
even
if
they
are entered
in
center/span
format.
If
duplicate
frequencies
exist,
the
analyzer
makes
multiple
measurements
on
identical
points
to
maintain
the
specied
number
of
points
for
each
subsweep
.
The
data
is
shown
on
the
display
as
a
single trace
that is
a
composite
of
all
data
taken.
The
trace
may
appear
uneven
because
of
the
distribution
of
the
data
points
,
but
the
frequency
scale
is
linear
across
the total
range.
Once
the
list
frequencies
have
been
dened
or
modied,
the
list frequency
sweep mode
can
be
selected
with the
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LIST
FREQ softkey
in
the
sweep
type
menu
(see
\List
Frequency
Sweep").
The
frequency
list
parameters
can
also
be
saved
with
an
instrument
state
.
6-24 Application and Operation Concepts