Agilent Technologies 4395A - Page 387

Data
Processing
I-V
to Reection
Coecient Conversion
Converts
the calculated
V/I
(voltage/current
ratio)
into
0
(reection
coecient)
data.
The
4395A
uses the
reection
coecient
as
its
internal
data.
Calibration
Coecient Arrays/Calibration
During
calibration,
the
4395A
measures
three
types
of
standards
and
stores
them
in
the
calibration
coecient
arrays
.
This
data
is
used
to
carry
out
S
11
1
port
calibration
against
the
0
value
determined
through
the
I-V
!
0
conversion
and
to
determine
the
APC-7
calibration
level
of
the
43961A.
A
veraging
Refer
to
\A
veraging"
under
\Data
Processing
for
Network
Measurement"
in
this
chapter.
Raw
Data
Arrays
These
arrays
store
the
results
of
all
the
preceding
data
processing
operations
as reection
coecients
(0).
These
arrays
are
directly
accessible
via
GPIB
,
or using
the internal
disk
drive
or
the
memory
disk.
Note
that
the
numbers
here
are
still
complex
pairs
.
Fixture
Compensation
Coecient
Arrays/Fixture
Compensation
During
xture
compensation,
4395A
measures
three
types
of
standards
and stores
them in
the
xture
compensation
coecient
arrays.
This data
is
used
to
remove
errors
attributable
to
the
xture
.
These
arrays are
directly accessible
via
GPIB
,
or
using
the
internal
disk
drive
or
the
memory
disk.
Data
Arrays
The
results
of
xture
compensation
are
stored
in
the
data
arrays
as
complex
number
pairs
.
These
arrays
are
accessible
via
GPIB
or
by
using
the
internal
disk
drive
or
the
memory
disk.
Memory
Arrays
If
the
data-to-memory
operation is
performed (using
the
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N
N
N
N
N
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N
NN
N
DATA
!
MEMORY
softkey), the
data
arrays are
copied
into
the
memory
arrays
(data
trace
arrays
are
also
copied
into
the
memory
trace arrays
at
same
time).
These
arrays
are
accessible
using
the
internal
disk
drive
or
the
memory disk.
When
accessed
via
GPIB
,
these
arrays
are
read-only
.
If memory
is displayed,
the
data
from
the
memory
arrays
goes
through
the
same
data
processing
ow
path
as
the
data
from
the
data
arrays
.
Conversion
When impedance or admittance is specied as a measurement parameter
, the 4395A converts
the corresponding reection coecient into the impedance or admittance value
. In this case
,
however, the raw data, data, and
memory arrays store the data as reection coecients
, not as
an impedance value
.
Format
Refer to \Format" under \Data Processing for Network Measurement" in this chapter.
Data Hold
Refer to \Data Hold" under \Data Processing for Network Measurement" in this chapter.
Basic Measurement Theory A-11