Tektronix 2606B Declassification
Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
Model 2606B System SourceMeter
077143300/July 2018 *P077143300* Page 1 of 5
Declassification and Security Instructions
Introduction
If you have data security concerns, this document tells you how to clear or sanitize the memory devices in the
Model 2606B System SourceMeter®. It also explains how to declassify an instrument that is not functioning.
The procedures in this document are written to meet the requirements specified in:
• NISPOM, DoD 5220.22-M, chapter 8
• ISFO Process Manual for Certification and Accreditation of Classified Systems under NISPOM
Contact information
If you have any questions after you review the information in this documentation, please contact your local
Keithley Instruments office, sales partner, or distributor, or call Keithley Instruments corporate headquarters
(toll-free inside the U.S. and Canada only) at 1-800-935-5595, or from outside the U.S. at
+1-440-248-0400. For worldwide contact numbers, visit the Keithley Instruments website (tek.com/keithley).
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 modules 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 non-secured 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.
Model 2606B Declassification and Security Instructions
Page 2 of 5 077143300/July 2018
Description of memory
The 2606B contains memory devices to hold firmware code that is executed by internal microprocessors to
operate the product and memory to save setup information and data. Each module of the Model 2606B stores
data in volatile and nonvolatile memory in the following devices:
Microprocessors: Contain some RAM for internal use. All information is lost when the instrument is powered
down.
Flash: A 32-megabyte flash device responsible for storing critical nonvolatile information, including:
• The firmware image
• The digital- and analog-side FPGA images
• Factory scripts
• Dedicated reading buffers
• An internal file system, which stores system settings, user setups, user strings, and user scripts
SDRAM: A total of 32 megabytes that holds data and instructions for firmware execution.
EEPROM: A 128-kilobit device that stores calibration constants for the SMU and manufacturing strings (for
example, the analog board serial number).
Memory devices
The following tables list devices with volatile and nonvolatile memory in the standard instrument and listed
options.
Volatile memory devices
The following table lists volatile memory devices and relevant memory-related information.
Type and
minimum size
Function
User
modifiable
Data input
method
Location
To clear
To sanitize
SRAM 32 kB
Temporary memory used by the
microprocessor controller for
internal processor operations
Yes
Indirect
U1 on the
2636-142 digital
boards (x2)
Turn
instrument
power off
Turn
instrument
power off
SRAM 32 kB
Instruction cache for the
microprocessor controller
No
None
U1 on the
2636-142 digital
boards (x2)
Turn
instrument
power off
Turn
instrument
power off
SRAM 32 kB
Data cache for the
microprocessor controller
Yes
Indirect
U1 on the
2636-142 digital
boards (x2)
Turn
instrument
power off
Turn
instrument
power off
DDR SDRAM
32 MB
Temporary memory used by the
microprocessor controller for
internal processor operations
Yes
Indirect
U6 on the
2336-142 digital
boards (x2)
Turn
instrument
power off
Turn
instrument
power off
SRAM
256 B
Temporary memory used by the
display controller for internal
processor operations
Yes
Indirect
U2 on the
389536900
display boards
(x2)
Turn
instrument
power off
Turn
instrument
power off
FPGA
SRAM 432 kB
CLB 1920
(120 kB)
Digital control and
communication with other TSPLink enabled instruments
Yes
Indirect
U29 on the
2636-142 digital
boards (x2)
Turn
instrument
power off
Turn
instrument
power off
FPGA
SRAM 288 kB
CLB 896 (56 kB)
Digital control
No
None
U9 on the
2602a-102
analog boards
(x4)
Turn
instrument
power off
Turn
instrument
power off
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