Agilent Technologies 4395A - Page 259

Typical
Impedance
Measurement
Techniques
Determining
Q
V
alue
Using
the
Width
Search
Function
The
width
search
function
analyzes
a
resonator
and
displays
the
center point,
width, and
quality
factor
(Q)
for
the
specied
bandwidth.
T
o
use
the
width
search
function, open
the Widths
Menu by
pressing 4
Sea
rch
5
and
choosing
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WIDTH
[
]
.
The Widths
Menu provides
access to
a
submenu
called
Width
V
alue
Menu
,
which
lets
you
specify
the
bandwidth
search
criteria.
These
two
menus
are
described
in
this
section.
Widths Menu
This menu
controls the
width
search
function.
Softkey
Label
Description
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SEARCH IN
Searches
for
the
cut-o
point
on
the
trace
that
is
within the
current
cut-o
points
.
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N
SEARCH
OUT
Searches
for
the
cut-o
point
on
the
trace
outside
the
current
cut-o
points
.
N
N
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N
WIDTHS
on
OFF
Turns
on
the
width
search
feature
and
calculates
the
center
frequency
of
a
lobe
on
the
trace
,
width,
Q,
and
cut-o
point
deviation
from
the
center
stimulus
value
.
The
cut-o
point
that
denes
the
width
parameters
is
set
using
the
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N
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N
WIDTH
VALUE
softkey
.
The
1marker
is
automatically
changed
to
the
tracking
1marker
when
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NN
N
N
WIDTHS
is
turned
on.
When
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NN
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N
WIDTHS
is
ON,
the
(normal)
1marker
cannot
be
selected.
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N
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WIDTH
VALUE
Sets
a
measurement
value
of
a
cut-o
point
that
denes
the
start
and
stop
points
for
a
width
search.
The
width
search
feature
analyzes
the
center
point
and
the
width
between
the
trace
down
from
(or
up
to)
the
anti-resonance
point
or
resonance
point
and
the
quality
factor
(Q)
for
the
resonator
.
Width
units
are
in
the
units
of
the
current
format.
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N
RETURN Returns
to the
Search Menu
.
Width Value Menu
This menu lets you specify the search criteria for
the width search function.
Analyzing the Measurement Results 8-57