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4263B
Standard
for
the
LO
AD
Correction
Y
ou
need
a
standard
to
do
the
LO
AD
correction.
This
can
be
any
standard
which
has
specied
reference
values
.
The
type
of
standard
does
not
have
to
be
same
as
the
device
to
be
measured.
That
is
,
a
capacitor
standard
can
be
used
when
you
want
to
measure
inductors
.
Using
a
Standard
Supplied
by
a
Component
Manufacturer
Use
the
manufacturer
specied
values
of
the
standard
as
the
reference
values
for
the
LO
AD
correction.
Using
Y
our
Own
Standard
If
you
do
not
have
a
standard
with
specied
reference
values
,
you
can
use
a
device
such
as
a
general
purpose
capacitor
or
resistor
.
T
o
use
such
a
device
,
it
is
necessary
to
measure
its
impedance
value
accuratelly
.
The
measured
impedance
value
is
used
as
the
reference
value
for
the
LO
AD
correction.
Selecting
the
LO
AD
standard.
The
criteria
for
selecting
the
LO
AD
standard
is
as
follows:
When
measuring
DUT
s
of
various
impedance
values
,
it
is
recommended
to
use
a
100
to
1
k
device
as
the
LO
AD
standard.
It
can
be
measured
accurately
by
LCR
meters
.
When
measuring
a
DUT
of
one
impedance
value
,
it
is
recommended
that
the
LO
AD
standard
have
a
impedance
value
close
to
that
of
the
DUT
.
It
is
important
to
use
the
stable
LO
AD
standard
not
susceptable
to
inuences
of
environment
such
as
temperature
or
magnetic
elds
.
From
this
viewpoit,
capacitors
or
resistors
are
better
suited
than
inductors
.
Measuring
the
LO
AD
reference
value
.
Use
the
following
procedure
to
measure
the
LO
AD
standard's
value
accurately
.
1.
Connect
the
Agilent
direct-connect
test
xture
(such
as
16047A)
to
a
high
accuracy
LCR
meter
,
and
perform
the
OPEN/SHORT
correction.
2.
Set
the
test
frequency
.
It
should
be
same
as
the
frequency
for
measuring
the
DUT
.
3.
Set
the
LCR
meter's
measurement
conditions
(such
as
integration
time
or
averaging
time)
so
that
it
can
measure
as
accurately
as
possible
.
4.
Connect
the
LO
AD
standard
to
the
test
xture
,
and
measure
its
impedance
value
.
This
measurement
value
is
used
as
a
LO
AD
reference
value
.
7-14
Impedance
Measurement
Basics
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