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Limit
Line
Concept
As
you
can
see
in
Figure
A
-18 ,
segments
are
distinct
points
that
dene
where
limit
lines
begin
or
end.
Limit
lines
span
the
distance
between
segments
and
represent
the
upper
and
lower
test
limits
.
Figure
A
-18
shows
another
important
aspect
of
limit
lines
.
The
far
left
hand
side
of
a
set
of
limit
lines
will
continue
from
the
minimum
sweep
parameter
value
(st
ar
t )
and
the
far
right
hand
side
of
a
set
of
limit
lines
will
continue
until
the
maximum
sweep
parameter
value
(stop).
A
segment
is
placed
at
a
specic
sweep
parameter
value
(a
single
frequency
for
example).
The
rst
segment
denes
the
limit
line
value
from
the
minimum
sweep
parameter
value
.
Once
its
sweep
parameter
value
is
entered,
the
upper
and
lower
test
limit
(+5
dB
and
05
dB
for
example)
need
to
be
supplied.
Dening
a
second
segment
denes
where
the
rst
set
of
limit
lines
ends
.
This
process
is
repeated
to
create
dierent
sets
of
limit
lines
,
each
having
new
upper
and
lower
limits
.
Up
to
18
segments
can
be
entered.
Limits
can
be
dened
independently
for
the
two
channels
.
The
example
in
Figure
A
-18
shows
a
combination
of
limit
lines
that
change
instantly
and
gradually
.
Segment
1
is
at
2
MHz
and
has
an
upper
and
lower
limit
of
+5
and
05
dB
,
respectively
.
Notice
the
upper
and
lower
limit
lines
start
at
the
st
ar
t
frequency
(1
MHz)
and
end
at
segment
1.
Segment
2
is
also
at
2
MHz
with
dierent
upper
and
lower
limits
of
+10
dB
and
010
dB
,
changing
the
limit
values
instantly
.
Segment
3
is
at
3
MHz
with
the
same
limit
value
as
segment
2
to
obtain
a
at
limit
lines
.
Segment
4
is
at
4
MHz
with
upper
and
lower
limit
values
of
+15
dB
and
015
dB
,
changing
the
limit
values
gradually
.
Notice
the
upper
and
lower
limit
lines
start
at
the
segment
and
continue
until
the
stop
frequency
(5
MHz).
Note
Limit
lines
cannot
be
cut.
Therefore
,
when
limit
lines
are
needed
partially
along
the
sweep
parameter
axis
,
the
non-limit-testing
portion
must
also
be
entered.
Set
the
non-limit-testing
portion
by
forcing
the
upper
and
lower
limit
values
out
of
range
(+500
dB
and
0500
dB
for
example).
Both
an
upper
limit
and
a
lower
limit
(or
delta
limits)
must
be
dened.
If
only
one
limit
is
required
for
a
particular
measurement,
force
the
other
limit
out
of
range
(+500
dB
or
0500
dB
for
example).
Turning
ON/OFF
Limit
Line/Limit
T
est
Limit
lines
and
limit
testing
features
are
off
unless
explicitly
turned
on
by
the
user
.
After
entering
the
limit
line
information,
you
can
turn
on
the
limit
line
feature
and
optionally
the
limit
testing
features
.
Turning
these
features
off
has
no
eect
on
the
entered
limit
line
information.
Segments
Entering
Order
Needs
Notice
Generally
,
the
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
sweep
parameter
value
.
One
exception
is
when
two
segments
have
the
same
sweep
parameter
value
as
described
in
Figure
A
-18.
If
the
same
sweep
parameter
values
exist,
the
analyzer
draws
the
limit
lines
according
to
entered
segment
order
.
F
or
example
,
in
Figure
A
-18,
segment
1
should
be
entered
in
advance
of
segment
2.
A-30
Basic
Measurement
Theory
Содержание 4395A
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Страница 49: ...D 1 Manual Changes by Serial Number D 1 D 2 Manual Changes by Firmware Version D 1 Contents 23 ...
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Страница 58: ...Power Requirements Figure 2 1 Power Cable Supplied 2 6 Installation Guide ...
Страница 69: ...Connecting an Active Probe Figure 2 10 Connecting Test Fixture Installation Guide 2 17 ...
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Страница 76: ...Step 1 Preparing for the Measurement Figure 3 3 S Parameter Test Set Setup 3 4 Quick Start Guide ...
Страница 93: ...Step 2 Setting Up the 4395A Quick Start Guide 3 21 ...
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Страница 198: ...Calibration Required for the Impedance Analyzer Mode Figure 7 2 Connecting Test Fixture 7 16 Calibration ...
Страница 251: ...Measuring Zero Span Figure 8 28 Marker Time Analyzing the Measurement Results 8 49 ...
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Страница 298: ...AM Signal Measurement SA where 1Mkr is the 1marker value shown in Figure 10 18 10 20 Examples of Applications ...
Страница 301: ...FM Signal Measurement SA Figure 10 20 Zooming Carrier Signal of FM Signal Examples of Applications 10 23 ...
Страница 374: ...Measurement accessories available 11855A 75 Type N Adapter Kit 11856A 75 BNC Adapter Kit 12 4 Accessories and Options ...
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Страница 410: ...Markers Figure A 19 Bandwidth Search Example A 34 Basic Measurement Theory ...
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Страница 449: ...B Softkey Reference Softkey Reference B 1 ...
Страница 462: ...4Bw Avg5 B 14 Softkey Reference ...
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