xx
TDS820
ZZZ
Digitizing Oscilloscope
Declassification and Security Instructions
www.tektronix.com
077-0109-00
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R 97077
Table of Contents
Preface .............................................................................................................. iii
Clear and Sanitize Procedures. . ..... . ..... . .... . . .... . ..... . ..... . ..... . ..... ..... . ..... . ..... . ..... . ... . . . .... . .. 1
Memory Devices............................................................................................... 1
TDS820 Declassification and Security i
Table of Contents
ii TDS820 Declassification and Security
Preface
This document helps customers with data security concerns to sanitize or remove
memory devices from TDS820 Digitizing Oscilloscopes.
These products have data storage (memory) devices. These instructions tell how
to clear or sanitize the memory devices.
Products
Related Documents
Terms
The following Tektronix products are covered by this document:
TDS820
The TDS820
070-8514-XX, and the TDS820 Digitizing Oscilloscope User Manual,
Tektronix part number 070-8512-XX, are available on the Tektronix Web site at
www.tektronix.com/manuals.
The following terms may be used in this document:
Clear. T
All reusable memory is cleared to deny access to previously stored information
by standard means of access.
Erase. This is equivalent to clear.
Media s
from the instrument, such as a USB port.
Nonvo
Remove. Thisisaphysicalmeanstoclearthedatabyremovingthememory
e from the instrument. Instructions are available in the product service
devic
manual.
Digitizing Oscilloscope Service Manual, part number
his removes data on media/memory before reusing it in a secured area.
torage/data export. Various devices that are used to store or export data
latile memory. Data is retained when the instrument is powered off.
tize. This eradicates the data from media/memory so that the data cannot be
Sani
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. This is equivalent to sanitize.
User-modifiable. The m emory device can be written to by the user during normal
instrument operation, using the instrument’s user interface or remote control.
Volatile memory. Data is lost when the instrument is powered off.
TDS820 Declassification and Security iii
Preface
iv TDS820 Declassification and Security
Clear and Sanitize Procedures
Memory Device
Table 1: Vol
atile memory devices
s
Type and
minimum size Function
CMOS SRAM,
2KX8
CMOS VDRAM,
Dual port
64K X 4
CMOS SRAM,
32K X 8
CMOS SRAM,
32K X 8
CMOS SRAM,
32K X 8
CMOS FIFO
512 x 9
CMOS, DRAM
256K x 4
CMOS, SRAM
8K x 8
CMOS, SRAM
32K x 8
Display memory No
Display memory No
DSP Instruction memory
System Processor Kernel
Memory
DSP Data Memory
DSP FIFO Memory
System Processor Memory
Horizontal Position Table
Memory
Acquisition Memory No Acquisition board
The following tables list the volatile and nonvolatile memory devices in the
standard instrument and listed options.
You only need to perform the TekSecure™ Procedure to clear the instrument.
(See page 3, TekSecure™ Procedure.)
User
modifiable Location Process to clea r
Processor/Display board Remove power from the
Processor/Display board Remove power from the
No
No
No
No
No
No Acquisition board
Processor/Display board Remove power from the
Processor/Display board Remove power from the
Processor/Display board Remove power from the
Processor/Display board Remove power from the
Processor/Display board Remove power from the
instrument for at least
20 seconds.
instrument for at least
20 seconds.
instrument for at least
20 seconds.
instrument for at least
20 seconds.
instrument for at least
20 seconds.
instrument for at least
20 seconds.
instrument for at least
20 seconds.
Remove power from the
instrument for at least
20 seconds.
Remove power from the
instrument for at least
20 seconds.
TDS820 Declassification and Security 1
Clear and Sanitize Procedures
Table 2: Nonvol
atilememorydevices
Type and
minimum size Function
CMOS, RAM
w/battery
128K x 8
CMOS, EPROM
128K x 8
CMOS, EEPROM
256 x 8
Processor, CMOS,
8-bit Microcomputer,
One-time
programmed
6206 x 8 EPROM
176 x 8 RAM
CMOS, PROM
64K x 1
1
Erasing EP
2
Store the board in a secure area, or destroy the board.
ROM contents will render the product inoperable.
Reference Waveforms &
Instrument Setups Memory
System Processor bootup
code memory
Acquisition Calibration
Constants
Probe & Temperature Sense
Microcontroller
Acquisition FPGA Serial
Configuration PROM
See the TDS
at www.tektronix.com/manuals, for instructions on accessing and removing the
Processor/Display and Acquisition boards.
User
modifiable Location Process to clear
Yes
No.
No Acquisition board
No Acquisition board
No Acquisition board
Processor/Display board
A11U1107
Processor/Display board
A11U1331
A10U1010
A10U2620
A10U2621
A10U1020
A10U1210
See the TekSecure™
Procedure,whichfollows
this table.
Remove label and expose
to UV light
None
None
None
1
2
2
2
820 Digitizing Oscilloscope Service Manual, available on the Web
2 TDS820 Declassification and Security
Clear and Sanitize Procedures
TekSecure™ Procedure
All user storab
internal nonvolatile memory. TekSecure capability is available for erasing all
reference waveforms and instrument setups.
To start TekSecure, press SHIFT UTILITY (front panel) > System (main) >
Config (pop-up) > Tek Secure Erase Memory (main) > OK Erase Setup & Ref
Memory (side).
Executing TekSecure™ performs the following operations:
1. Replaces all waveforms in Reference memories w ith an “empty” all zeros
pattern. This can be verified by pressing the MORE button (front panel).
Observe that the Ref1 – Ref4 selections are not highlighted and, if they are
pressed, nothing happens (no waveform is restored because no reference
waveforms are available).
2. Replaces the current front panel setup and all saved setups in Setup memories
with the factory setup. This can be verified by following these steps:
a. Press SAVE/RECALL SETUP (front panel) > Recall Saved Setup
(main).
b. Observe that all ten Recall Setup selections indicate “factory” (rather
than “user”).
c. Observe that the current setup matches the factory setup as described in
the TDS820 User Manual, Table E-1: Factory Initialization defaults.
le data (reference waveforms and instrument setup s) are stored in
3. Calculates the checksums of all waveform memory and setup memory
locations in order to verify successful completion of waveform and setup
memory
displays a warning message; if the c hecksum calculation is successful, Tek
Secure displays a confirmation message.
Using TekSecure will not affect calibration of the instrument because the factory
calibration constants are stored on the Acquisition board completely separate
from any acquisition data or user files. This allows complete erasure/removal
of any secure data without affecting oscilloscope calibration. It also allows the
oscilloscope to be calibrated in a nonsecure site, and then used in a secure area
hout need for recalibration.
wit
NOTE. If you have any questions, contact the Tektronix Technical Support Center
at 1-800-833-9200*3.
erasure. If the checksum calculation is unsuccessful, TekSecure
TDS820 Declassification and Security 3
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