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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:

ninstrument state definition

nmemory allocation

w internal and external data storage

ndescription 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:

nChapter 2, “Making Measurements,” contains step-by-step procedures for making measurements or using particular functions.

nChapter 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 4 Mbytes, that contains all of the parameters that make up the cuTTent instrument state. An instrument state consists of all the stimulus and response parameters that set up the analyzer to make a specific 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-Volatile Memory” to read more about the differences.

Volatile memory is cleared upon a power cycle of the instrument and, except as noted, upon instrument preset.

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HP 8753E manual Preset State and Memory Allocation, Types of Memory and Data Storage