8-13
Preset State and Memory Allocation
Memory Allocation
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 section contains information on the following subjects:
• Types of memory and data storage
• Determining memory requirements
• Storing data to disk
• Conserving memory
• Using saved calibration sets
Types of Memory and Data Storage
The analyzer utilizes two types of internal 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 current 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
read more about the differences.
Volatile memory is cleared upon a power cycle of the instrument and, except as noted, upon
instrument preset.
Non-Volatile Memory
This is CMOS read/write memory that is protected by a battery to provide storage of data
when line power to the instrument is turned off. With this battery protection, data can be
retained in memory for
≈ 2
50 days at 70
°
C and for
≈
10 years at 25
°
C (characteristically).
Non-volatile memory consists of a block of user-allocated memory and a block of fixed
memory.
The user-allocated memory is available for you to save the following data:
• instrument states
• measurement calibration data
• power meter calibration data
• user calibration kit definitions
• memory traces
• user preset
Summary of Contents for 8719ES
Page 6: ...vi ...
Page 10: ...Contents x Contents ...
Page 11: ...1 1 1 HP 8719 20 22ES Specifications and Characteristics ...
Page 60: ...1 50 HP 8719 20 22ES Specifications and Characteristics Instrument Specifications ...
Page 61: ...2 1 2 HP 8719 20 22ET Specifications and Characteristics ...
Page 98: ...2 38 HP 8719 20 22ET Specifications and Characteristics Instrument Specifications ...
Page 99: ...3 1 3 Front Rear Panel ...
Page 111: ...4 1 4 Menu Maps ...
Page 113: ...4 3 Menu Maps Menu Maps Figure 4 2 Menu Map for Copy ...
Page 114: ...4 4 Menu Maps Menu Maps Figure 4 3 Menu Map for Display ...
Page 115: ...4 5 Menu Maps Menu Maps Figure 4 4 Menu Map for Format Figure 4 5 Menu Map for Local ...
Page 116: ...4 6 Menu Maps Menu Maps Figure 4 6 Menu Map for Marker Marker Fctn and Marker Search ...
Page 118: ...4 8 Menu Maps Menu Maps Figure 4 9 Menu Map for Power and Sweep Setup ET only ...
Page 119: ...4 9 Menu Maps Menu Maps Figure 4 10 Menu Map for Power and Sweep Setup ES only ...
Page 120: ...4 10 Menu Maps Menu Maps Figure 4 11 Menu Map for Preset ...
Page 121: ...4 11 Menu Maps Menu Maps Figure 4 12 Menu Map for Save Recall ...
Page 122: ...4 12 Menu Maps Menu Maps Figure 4 13 Menu Map for Scale Ref ...
Page 128: ...5 1 5 Hardkey Softkey Reference ...
Page 194: ...6 1 6 Error Messages ...
Page 222: ...7 1 7 Options and Accessories ...
Page 234: ...8 1 8 Preset State and Memory Allocation ...
Page 253: ...8 20 Preset State and Memory Allocation Memory Allocation ...
Page 254: ...9 1 9 Understanding the CITIfile Data Format ...
Page 269: ...9 16 Understanding the CITIfile Data Format Useful Calculations ...
Page 270: ...10 1 10 Determining System Measurement Uncertainties ...
Page 281: ...10 12 Determining System Measurement Uncertainties Measurement Uncertainty Equations ...