HP 8753D - Page 340

The Calibrate
Menu
There
are
twelve
dierent
error terms
for a
two-port measurement
that can
be corrected
by
accuracy
enhancement
in
the
analyzer
. These
are directivity
, source
match, load
match,
isolation,
reection
tracking,
and
transmission
tracking,
each in
both the
forward and
reverse
direction.
The
analyzer
has
several
dierent
measurement calibration
routines to
characterize
one
or
more
of
the systematic
error terms
and remove
their eects
from
the
measured
data.
The
calibrate
menu
allows
you
to
perform the
measurement calibration
routines.
These
procedures
range
from
a
simple
frequency
response calibration
to a
full two-port
calibration
that
eectively
removes
all
twelve
error
terms.
Response
Calibration
The
response
calibration,
activated by
pressing the
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
RESPONSE
softkey
within
the calibrate
menu,
provides
a
normalization
of
the
test
setup
for
reection
or
transmission measurements
.
This
calibration
procedure
may
be
adequate
for
measurement
of
well
matched
devices.
This
is
the
simplest
error-correction
to
perform,
and
should
be
used
when
extreme
measurement
accuracy
is
not
required.
Response
and
Isolation
Calibration
The
response
and
isolation
calibration,
activated by
pressing the
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
RESPONSE
&
ISOL'N
softkey
within
the
calibrate
menu,
provides a
normalization for
frequency
response
and
crosstalk
errors
in
transmission
measurements
,
or
frequency
response
and
directivity
errors
in
reection
measurements
.
This
procedure
may
be
adequate
for
measurement
of
well
matched
high-loss
devices
.
S
11
and
S
22
One-P
ort
Calibration
The
S
11
and
S
22
one-port
calibration
procedures
,
activated
by
pressing
the
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
S11
1-PORT
or
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
S22
1-PORT
softkey
within
the
calibrate
menu,
provide directivity
, source
match,
and
frequency response
vector error-correction
for
reection
measurements
.
These
procedures
provide high
accuracy reection
measurements
of
one-port
devices
or
properly
terminated
two-port devices
.
Full
Two-Port
Calibration
The
full
two-port calibration,
activated
by
pressing
the
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
FULL
2-PORT
softkey within
the
calibrate menu, provides directivity
, source match,
load match, isolation, and frequency
response vector error-correction, in both forward and reverse
directions, for transmission and
reection measurements of two-port devices
. This calibration
provides the best magnitude and
phase measurement accuracy for both transmission and reection measurements of two-port
devices, and requires an S-parameter test set.
In this type of calibration, both forward and reverse measurements must be made
.Y
ou have
the option of setting the ratio of the number of forward (or reverse) sweeps versus the number
of reverse (or forward) sweeps.To access this function, press 4
CAL
5
NNNNNNN
NNNNNNN
MORE
NNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
TESTSET SW and
enter the number of sweeps desired.
Application and Operation Concepts 6-73