Agilent Technologies 4395A - Page 258

Typical
Impedance
Measurement
Techniques
Using
the Equivalent
Circuit Analysis
Function
Calculating
Approximate V
alues
of
Equivalent
Circuit
Constants
.
1.
Press 4
Display
5 and
choose
NN
NN
NN
NN
N
N
N
N
N
N
MORE
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
EQUIV CKT
MENU to
display the
equivalent
circuit
menu.
2.
Choose
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
SELECT
CKT
[
]
to
display
the
equivalent
circuit
models.
3.
Select
one
of the
following:
Type
of
DUT
Softkey
Coils
with
high
core
loss
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
CKT
A
Coils
in
general
/
Resistors
NN
N
N
N
B
High-value
resistors
N
NN
NN
C
Capacitors
N
N
N
N
N
D
Resonators
N
N
N
N
N
E
4.
Choose
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
CALCULATE
EQV
PARAM
to
calculate
the
equivalent
circuit
parameters
.
After
a
beep
,
the
calculated
equivalent
parameters
are
displayed
on
the
screen. T
o hide
the
equivalent parameters
, press
4
Displa
y
5
and choose
N
N
N
N
N
NN
NN
NN
NN
N
MORE
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
EQUIV
CKT MENU
. Then
toggle
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
N
N
N
N
N
N
N
N
NN
NN
N
DISP
EQV
PARM
[ON]
to
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
[OFF]
.
Y
ou
can
simulate
a
frequency
characteristic
trace
from
the
equivalent
circuit
parameters
obtained
and
compare
it
with
the
measured
trace
.
5.
Press
4
Displa
y
5
N
NN
N
N
N
N
N
N
N
N
N
N
N
MORE
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EQUIV
CKT
MENU
.
6.
Choose
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
SIMULATE
F-CHRST
.
After a
beep
,
the
simulated
trace
is
displayed.
The
simulated
trace
is
stored
in
the
memory
trace
.
T
o
turn o
the simulated
trace
,
press
4
Displa
y
5
and
choose
N
N
N
N
N
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
DISPLAY
[
]
N
N
N
N
N
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
DISPLAY:
DATA
.
Simulating
a
Trace
from
the
Equivalent
Circuit
P
arameters
.
Y
ou
can
also
simulate
the
frequency
characteristics
of
an
equivalent
circuit
by
entering
its
parameters
.
1.
Press
4
Displa
y
5
and choose
N
N
N
N
N
NN
NN
NN
N
N
N
MORE
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
EQUIV
CKT MENU
to display
the equivalent
circuit menu.
2.
Choose
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
SELECT
EQV
CKT
[
]
to
display
the
equivalent circuit
models.
3.
Select the equivalent circuit model. Then choose
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
RETURN .
4.
Choose
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNN
DEFINE EQV PARAMS
.
5. Enter the equivalent
circuit parameter value for the activated parameters
.
6.
Choose
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
SIMULATE F-CHRST
to simulate the frequency characteristics
.
After a beep
, the simulated frequency characteristics are displayed.
8-56 Analyzing the Measurement Results