HP 8753D - Preset State and Memory Allocation; Where to Look for More Information; Types of Memory and Data Storage; Volatile Memory

12
Preset
State and
Memory Allocation
The analyzer
is
capable
of
saving
complete
instrument
states
for
later
retrieval.
It
can
store
these instrument
states
into
the
internal
memory
,
to
the
internal
disk,
or
to
an
external
disk.
This chapter
describes
these
capabilities
in
the
following
sections:
instrument state
denition
memory
allocation
internal
and
external
data
storage
description
of
analyzer
state
after
preset
Where
to
Look
for
More
Information
Additional
information about
many
of
the
topics
discussed
in
this
chapter
is
located
in
the
following areas:
Chapter 2,
\Making Measurements
,"
contains
step-by-step
procedures
for
making
measurements
or
using particular
functions
.
Chapter
4,
\Printing,
Plotting,
and
Saving
Measurement
Results
,"
contains
instructions
for
saving
to
disk
or
the
analyzer
internal
memory
,
and
printing
and
plotting
displayed
measurements
.
Types
of Memory
and Data
Storage
The
analyzer
utilizes
two
types
of
memory
and
can
also utilize
the internal
disk drive
or
be
connected
to
an
external
disk
drive:
Volatile
Memory
This is dynamic read/write memory
, of approximately 2 Mbytes
, that contains all of the
parameters that make up the
current instrument state
. An instrument state consists of all the
stimulus and response parameters that
set up the analyzer to make a specic measurement.
Some data that you may think
is part of the instrument state (such as calibration data and
memory traces) are actually stored in non-volatile
memory. See \Non-V
olatile Memory" to read
more about the dierences
.
Volatile memory is cleared upon a power cycle of the instrument and, except as noted, upon
instrument preset.
Preset State and Memory Allocation 12-1