Agilent Technologies 4395A - Page 304

Evaluation
of
a
Chip Capacitor
(ZA Mode)
Figure
10-22.
Connecting
the
T
est
Fixture
Setting
the
Electrical
Length
of
the
T
est
Fixture
Connecting
a
test
xture
adds
an
extra
electrical
length
to
the
test
circuit.
This
electrical
length,
which is
specic
to
the
test
xture
you
use
,
must
be
known
to
the
4395A
so
that
it
can
compensate
for
the
extra
electrical
length
and
eliminate
errors
due
to
phase
shifts
.
The
4395A
incorporates
a
database
of
Agilent
test
xtures
with
their
own
electrical
lengths
.
This
database
contains
the
electrical
length
of
the
16192A
test
xture
.
T
o
set
the
electrical
length
of
the
test
xture
,
follow
these
steps:
1.
Press
4
Meas
5
.
2.
Choose
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
FIXTURE [NONE]
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
SELECT FIXTURE
.
3.
As
the
model
number
for
the
test
xture
you
are
going
to
use
,
select
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
16192
.
4.
Choose
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
RETURN
.
5.
A
\ Del
" marker
appears at
the left
edge of
the screen.
Fixture Compensation
Fixture compensation is a
process that calibrates the 4395A with a test xture installed,
thereby eliminating errors produced
between the test xture electrode and the impedance test
kit's OUTPUT port.
Normally, the 4395A must be xture-compensated for the OPEN and SHORT circuit states
.
It
can optionally be xture-compensated for the LO
AD state
.
Note
For how to connect standard devices, refer to the documentation that comes
with the test xture you use.
To carry out xture compensation, follow these steps:
10-26 Examples of Applications