2.
Select the
type of
polar marker
you want
from the
following
choices:
Choose
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
LIN MKR
if you
want to
view the
magnitude and
the
phase
of
the
active
marker
.
The
magnitude
values
appear
in
units
and
the
phase
values
appear in
degrees.
Choose
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
LOG
MKR
if
you
want
to
view
the
logarithmic
magnitude and
the phase
of the
active marker
.The
magnitude values
appear in
dB and
the
phase
values
appear
in
degrees.
Choose
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
Re/Im
MKR
if
you want
to
view
the
real
and
imaginary
pair
,
where
the
complex
data
is
separated
into
its
real
part
and imaginary
part. The
analyzer shows
the
rst
marker
value
the
real
part
(M
cos
),
and the
second value
is
the
imaginary
part
(M
sin
,
where
M=magnitude).
Figure 2-11.
Example of
a
Log
Marker
in
P
olar
F
ormat
T
o
Use
Smith
Chart
Markers
The
amount
of
power
reected from
a device
is directly
related to
the
impedance
of
the
device
and
the
measuring
system.
Each
value
of the
reection coecient
(0) uniquely
denes
a
device
impedance; 0
=0
only
occurs
when
the
device
and
analyzer
impedance
are
exactly
the
same
.
The reection
coecient for
ashort
circuit
is:
0
=
1
6
180
. Every
other value
for 0
also
corresponds uniquely
to a
complex device
impedance
,
according
to
the
equation:
Z
L
=
[(
1
+
0)
/
(1
0
0)]
2
Z
0
where Z
L
is your test device impedance and Z
0
is the measuring system's characteristic
impedance.
Note
For greater accuracy when using markers in the Smith chart format, it is
recommended
to activate the discrete marker mode
. Press
4
MARKER F
CTN
5
N
NNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNN
MKR MODE MENU
NNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNN
MARKERS:DISCRETE
.
1. Press
4
FORMAT
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SMITH CHART
.
2.
Press
4
MARKER FCTN
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MARKER MODE MENU
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SMITH MKR MENU
and turn the front panel knob or
enter a value from the front panel keypad to read the resistive and reactive components of
the complex impedance at any point along the trace. This is the default Smith chart marker.
Making Measurements 2-15
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