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4263B
T
est
Current
Level
Figure
3-6
shows
the
4263B's
simplied
model.
The
actual
current
level
applied
to
a
DUT
depends
on
the
test
signal
level
(Vs),
the
DUT's
impedance
value
(Z),
and
the
4263B 's
source
resistance
(Rs)
which
is
in
series
with
the
DUT
.
The
actual
current
level
(I)
through
the
DUT
is
calculated
using
the
following
equations
.
There
are
two
dierent
equations
according
to
which
voltage
source
is
used:
A
C
or
DC.
Impedance
Measurement
|
The
test
signal
source
is
A
C,
and
the
actual
test
current
level
can
be
obtained
as
follows:
Rs
is
selected
by
the
4263B 's
measurement
range
setting.
Measurement
Range
Setting
Rs
0.1
and
1
25
10
to
1
M
100
I
is
calculated
using
following
equation:
I
=
V
s
Z
+
R s
DC
Resistance
Measurement
(Option
001
only)
|
When
doing
the
DC
Resistance
measurement
(LS-DCR ,
LP-DCR ,
or
L2-R2 ),
the
4263B
switches
the
test
signal
source
from
A
C
to
DC
(the
DC
voltage
source
is
62
V).
Figure
3-12.
T
est
Signal
for
DCR
Measurement
Figure
3-12
shows
the
test
signal
for
a
DC
resistance
measurement.
F
or
a
DC
resistance
measurement,
the
4263B
measures
inductance
,
LS ,
LP ,
or
L2 ,
while
applying
an
A
C
test
signal,
and
then
measures
the
DC
resistance
,
DCR
or
R2 ,
while
applying
a
DC
test
signal.
The
4263B
measures
DC
resistances
two
times
,
switching
the
test
signal
level
to
+2
V
and
then
to
02
V
,
and
then
calculates
the
DC
resistance
value
.
This
method
cancels
the
oset
error
of
the
DC
voltage
source
.
3-32
Function
Reference
and
T
echnical
Information
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Summary of Contents for 4263B
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