touch, test, invent Series Instruments Declassification and Security Instructions
2
077086201 / July 2019
Terminology
The following terms may be used in this document:
Clear:
Removes data on media or in memory before reusing it in a secured area. Clears all reusable
memory to deny access to previously unsecured information.
Demo setups:
Demonstration applications that come loaded on the instrument; you cannot modify them.
Direct method of modification:
You can modify data directly.
Erase:
Equivalent to clear (see above).
Indirect method of modification:
The instrument system resources modify the data; you cannot modify
it.
Instrument declassification:
Procedures that must be completed before an instrument can be removed
from a secure environment. Declassification procedures include memory sanitization and memory
removal.
Media storage and data export device:
Devices that can be used to store or export data from the
instrument, such as a USB port.
Nonvolatile memory:
Data is retained when the instrument power is turned off.
Protected user data area:
Contains data that is protected by a password.
Remove:
Clears instrument data by physically removing the memory device from the instrument.
Sanitize:
Eradicates instrument data from media and memory so it cannot be recovered by other means
or technology. This is typically used when the device will be moved (temporarily or permanently) from a
secured area to a nonsecured area.
Scrub:
Directly retrieve and clear the contents of the memory device.
User accessible:
You can directly retrieve the contents of the memory device.
User data:
Measurement data that represents signals that you connect to the instrument.
User modifiable:
You can write to the memory device during normal instrument operation using the
front-panel interface or remote control.
User settings:
Instrument settings that you can change.
Volatile memory:
Temporary memory; data is lost when the instrument is turned off.
Description of memory
All of these instruments share common volatile and nonvolatile memory components. This document and these
instructions work for all instruments listed in the
(on page 1) section.
All of these instruments contain three sets of volatile and nonvolatile memory as described below.
The MASTER (U13 on the 2450-140 board) contains instrument logic, calibration data, and customer scripts,
readings, and data:
Two 16 MB nonvolatile NOR FLASH chips on the Digital board
Two 128 MB volatile DDR2 SDRAM chips on the Digital board
