Reection
Measurement
(NA)
1.
Press
4
Cal
5
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
CALIBRATE
MENU
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
S11
1-PORT
.
2.
Connect
the OPEN
standard to
port
1.
Then
press
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
[S11]:
OPEN
.
(The softkey
label
N
NN
NN
NN
N
N
N
N
N
N
N
OPEN
is
underlined when
the measurement
is complete
.)
3.
Connect
the
SHORT
standard
to
port
1. Then
press
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
SHORT
.
(The
softkey
label
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
SHORT
is
underlined
when the
measurement is
complete
.)
4.
Connect the
LOAD
standard to
port 1.
Then
press
N
N
NN
NN
NN
NN
N
N
N
N
LOAD
.
(The softkey
label
N
N
NN
NN
NN
NN
N
N
N
N
LOAD
is
underlined
when
the
measurement
is
complete
.)
5.
Press
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
N
N
N
N
N
N
N
N
NN
NN
NN
NN
DONE:
1-PORT
CAL
.
(
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
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
CORRECTION
on
OFF
is
automatically
set
to
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
ON
off
.)
Note
The
next
example
\S-Parameters
Measurement" uses
the calibration
corrections
you
just completed.
Do not
change
the
calibration
settings
before
doing
the
example
.
Measurement
Connect
the
DUT
to
the
test
set. Press
4
Scale
Ref
5
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
AUTO
SCALE
if
the
trace
needs
to be
rescaled.
Return
Loss
and
Reection
Coecient
The
return
loss
characteristics
are
displayed
in
the
Log
Mag
format
in
Figure
10-9
.
The
value
inside
the
passband
is
greater
than
outside
the
passband.
A
large
value
for
return
loss
corresponds
to
a
small
reected
signal
just
as
a
large
value
for
insertion
loss
corresponds to
a
small
transmitted
signal.
Figure 10-9.
Return Loss
To display the same data in terms
of reection coecient, press
4
Format
5
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FORMAT: LIN MAG
. This redisplays the existing measurement in a linear magnitude format
that varies from 0=1.00 at the top of the display (100% reection) to 0.00 at the bottom of the
display (perfect match).
Examples of Applications 10-9
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