HP 8753D - Page 336

How Eective
Is A
ccuracy Enhancement?
The
uncorrected
performance
of
the analyzer
is sucient
for many
measurements.
However,
the
vector
accuracy
enhancement
procedures
described
in Chapter
5, \Optimizing
Measurement
Results
,"
will
provide
a
much
higher level
of accuracy
. Figure
6-48 through
Figure 6-50
illustrate
the
improvements
that
can
be
made in
measurement accuracy
by using
amore
complete
calibration
routine
.
Figure 6-48
a shows
a measurement
in log
magnitude
format
with
a
response
calibration
only
.
Figure
6-48b
shows the
improvement in
the
same
measurement
using
an
S
11
one-port
calibration.
Figure
6-49
a
shows
the measurement
on a
Smith chart
with
response
calibration
only
,
and
Figure
6-49b
shows the
same measurement
with
an
S
11
one-port
calibration.
Figure
6-48.
Response
versus
S
11
1-P
ort
Calibration
on
Log Magnitude
Format
Application and Operation Concepts 6-69