HP 8753D - Page 374

Limit
lines are
displayed only
on Cartesian
formats
.
In
polar
and
Smith
chart
formats
,
limit
testing
of one
value
is
available:
the
value
tested
depends
on
the
marker
mode
and is
the
magnitude
or the
rst
value
in
a
complex
pair
.
The
message
NO
LIMIT
LINES DISPLAYED
is
shown
on the
display
in
polar
and
Smith
chart
formats
.
The
list values
feature
in
the
copy
menu
provides
tabular
listings
to
the
display
or
a
printer
for
every measured
stimulus value
.
These
include
limit
line
or
limit
test
information
if
these
functions
are
activated.
If
limit
testing
is
on,
an
asterisk
is
listed
next
to
any measured
value
that
is
out
of
limits
.
If
limit
lines
are
on,
and
other
listed
data
allows
sucient space
,the
upper
limit
and
lower
limit
are
listed,
together
with
the
margin
by
which
the
device
data
passes
or
fails
the
nearest
limit.
If
limit
lines
are
on,
they
are
plotted
with
the
data
on
aplot.
If limit
testing is
on,
the
PASS
or
FAIL
message
is
plotted,
and
the
failing
portions
of
the
trace
that
are a
dierent color
on the
display
are
also
a
dierent
color
on
the
plot.
If
limits
are
specied, they
are saved
in memory
with
an
instrument
state
.
Edit
Limits
Menu
This
menu
allows
you
to
specify
limits
for
limit
lines
or
limit
testing,
and
presents
a
table of
limit
values
on
the
display
.
Limits
are
dened
in
segments
.
Each
segment
is
a
portion
of
the
stimulus
span.
Up
to
22
limit
segments
can
be
specied
for
each channel.
The limit
segments
do
not
have
to
be
entered
in
any
particular
order:
the
analyzer automatically
sorts them
and
lists
them
on
the
display
in
increasing
order
of
start
stimulus
value.
F
or
each
segment,
the
table lists
the segment
number
,
the
starting
stimulus
value
,
upper
limit,
lower
limit,
and
limit
type
.The
ending stimulus
value
is
the
start
value
of
the
next
segment,
or
a
segment
can
be
terminated
with
asingle
point
segment.
Y
ou
can
enter
limit
values
as
upper
and
lower
limits
or
delta
limits
and middle
value
.
As
new
limit
segments
are
dened,
the
tabular listing
is
updated.
If
limit
lines
are
switched
on,
they
are
shown
on
the
display
.
If
no limits
have
been
dened,
the
table
of
limit
values
shows
the
notation
EMPTY
.
Limit
segments
are
added
to
the
table
using
the
N
N
N
N
N
N
N
N
N
N
N
ADD
softkey
or
edited
with
the
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EDIT
softkey
,
as
previously
described.
The
last
segment
on
the list
is followed
by
the
notation
END
.
Edit
Segment
Menu
This menu
sets the
values
of
the
individual
limit
segments
.
The
segment
to
be
modied,
or
a
default segment,
is selected
in
the
edit
limits
menu.
The
stimulus
value
can
be
set
with
the
controls in
the entry
block or
with
a
marker
(the
marker
is
activated
automatically
when
this
menu is
presented). The
limit values
can
be
dened
as
upper
and
lower
limits
,
or
delta
limits
and middle
value.
Both an
upper limit
and a
lower
limit
(or
delta
limits)
must
be
dened:
if only
one
limit
is
required
for
a
particular
measurement,
force
the
other out
of
range
(for
example +500 dB or
0 500 dB).
As new values are entered, the tabular listing of limit values is updated.
Segments do not have to be listed in any particular order: the analyzer sorts them
automatically in increasing order of start stimulus value when the
NN
NNNNNNNNNNNN
DONE key in the edit limits
menu is pressed. However
, the easiest way to enter a set of limits is to start with
the lowest
stimulus value and
dene the segments from left to right of the display
, with limit lines turned
on as a visual
check.
Phase limit values can be specied between +500

and 0 500

. Limit values above +180

and
below 0 180

are mapped into the range of 0 180

to +180

to correspond with the range of
phase data values.
Application and Operation Concepts 6-107