HP 8753D - Conserving Memory; Using Saved Calibration Sets

analyzer
from disk,
the stimulus
and response
parameters
are
restored
rst.
If
correction
is
on
for
the loaded
state
,
the
analyzer
will
load
a
calibration
set
from
disk
that carries
the same
title
as
the one
stored
for
the
instrument
state
.
Conserving
Memory
If
you
are
concerned
about
conserving
memory
,
either
internal
memory
or
external
disk
space,
some
of
the
most
memory-intensive
operations
include:
two-port
error
correction
interpolated
error
correction
1601
measurement
points
using
time
domain
saving
data
arrays
and
graphics
with
the
instrument
state
Using
Saved Calibration
Sets
When
you
are
saving
to
internal
memory
(CMOS,
non-volatile
memory),
calibration
sets
are
linked
to
the
instrument
state
and
measurement
parameter
for
which
the
calibration was
done
.
Therefore
a
saved
calibration
can
be
used
for
multiple
instrument states
as long
as
the
measurement
parameter
,
frequency
range
,
and
number
of
points
are
the same
.A
full
2-port
calibration
is
valid
for
any
S-parameter
measurement
with
the
same
frequency
range
and
number
of
points
.
When
an
instrument
state
is
deleted
from
memory
,
the associated
calibration
set
is
also
deleted
if
it
is unused
by
any
other
state
.
The
following
hints
will
help
you
avoid
potential problems:
If
a
measurement
is
saved
with
calibration
and interpolated
calibration on,
it
will
be
restored
with
interpolated
calibration
on.
A
calibration stored
from one
instrument
and
recalled
by
a
dierent
one
will
be
invalid.
T
o
ensure
maximum accuracy
, always
recalibrate
in
these
circumstances
.
No
record is
kept in
memory
of
the
temperature
when
a
calibration
set
was
stored.
Instrument
characteristics change
as a
function of
temperature
,
and
a
calibration
stored
at
one
temperature may
be inaccurate
if recalled
and
used
at
a
dierent
temperature
.
See
Chapter
7, \Specications
and
Measurement
Uncertainties
,"
for
allowable
temperature
ranges
for
individual specications
.
The HP 8753D can read disk les created by the HP 8753B/C and the HP 8753B/C can read
les created by the HP 8753D
. A disk le translator is available to make HP 8753A disk les
compatible with HP 8753B les
. These les can then be read by the HP 8753D
. Contact your
local Hewlett-P
ackard sales and service oce for a
copy of this disk le translator
.
Preset State and Memory Allocation 12-5