Atek HP 8753D, User Manual, Page: 632 / 677

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 denition
memory allocation
internal and external data storage
description of analyzer state after preset
Where to Look for More Information
A dditional 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:
V olatile 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 specic 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 dierences .
V olatile memory is cleared upon a power cycle of the instrument and, except as noted, upon
instrument preset.
Preset State and Memory Allocation 12-1