Agilent Technologies 4395A - Page 313

Evaluation
of
a
Crystal Resonator
(ZA Mode)
A
dmittance
Chart
1.
If the
results of
equivalent circuit
simulation are
currently displayed
for Channel
1, hide
the
results
by
pressing
4
Chan
1
5
4
Displa
y
5
and
choosing
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DISPLAY
[DATA&MEM]
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DISPLAY:
DATA
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RETURN
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MORE
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EQUIV
CKT
MENU
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DISP
EQV
PARM
[ON]
.
2.
With the
marker located
at the
resonance
frequency
(F
r
)
point, press
4
Ma
rk
er
!
5
and choose
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MKR
!
CENTER
to
set
the
sweep
center
frequency
to
the
resonance
frequency
.
3.
Press
4
Chan
1
5
4
Meas
5
and
choose
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MORE
[1/5]
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ADMITTNCE:
MAG(|Y|)
.
4.
Press
4
F
o
rmat
5
and
choose
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COMPLEX
PLANE
to
select
the
complex
plane format.
5.
Press 4
Displa
y
5 and
choose
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DUAL CHAN
ON off
to
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on OFF
to turn
OFF the
dual
channel
display
.
6.
Press
4
Scale
Ref
5
and
choose
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AUTO
SCALE
to
rescale
the
trace
.
7.
A
djust
the
span
by
pressing
4
Span
5
and
then
4
+
5
or
4
*
5
.
If
the
number
of
sweep
points
is
so
small
that
the
admittance
chart
does
not
form
a circular
shape
,
increase
the
number
of
sweep
points
by
pressing
4
Sw
eep
5
and
choosing
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NUMBER
OF
POINTS
then
pressing
4
*
5
.
(Press
4
Scale
Ref
5
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AUTO
SCALE
if
required.)
On
a
complex
plane
,
the
measurement
parameters
are
always
expressed
as
complex
numbers
even
if
you
have
selected
a
scalar
parameter
such
as
j
Y
j
.
Figure 10-31. A
dmittance Chart for a Crystal Resonator
Using the Marker
1. T
o move the marker
,
press 4
Marker
5 and turn the rotary knob
.
The real and imaginary parts of the complex number that corresponds to the marker position
are shown at the upper left corner of the grid area (see Figure 10-31).
If necessary, press 4
Scale Ref
5 and rescale the trace.
Examples of Applications 10-35