TCR801 Optical Clock Recovery
Declassification and Security Instructions
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Table of Contents
Table of Contents
Preface..........................................................................................................................................................................................4
Reference.............................................................................................................................................................................. 4
Products.................................................................................................................................................................................4
Terms..................................................................................................................................................................................... 4
Clear and sanitize procedures...................................................................................................................................................... 5
Memory devices.....................................................................................................................................................................5
Terms.............................................................................................................................................................................. 5
Volatile memory devices.................................................................................................................................................5
Nonvolatile memory devices...........................................................................................................................................5
Media and data export devices.............................................................................................................................................. 6
TCR801 Optical Clock Recovery Declassification and Security Instructions iii
Preface
Reference
Products
Terms
Preface
This document helps customers with data security concerns to sanitize or remove memory devices from their instrument.
These products have data storage (memory) devices and data output devices (USB ports). These instructions tell how to
clear or sanitize the memory devices and disable the data output devices. The instructions also tell 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 & Accreditation of Classified Systems under NISPOM
This document covers the following Tektronix product:
• TCR801 Optical Clock Recovery
The following terms may be used in this document:
• Clear. This removes data on media / memory. All reusable memory is cleared to deny access to previously stored
information using standard means of access.
• Erase. This is equivalent to clear.
• Instrument Declassification. A term that refers to procedures that must be undertaken before an instrument can be
removed from a secure environment. Declassification procedures involve memory sanitization or memory removal and
sometimes both.
• Media storage/data export. This refers to any of several devices that can be used to store or export data from the
instrument, such as a USB port.
• Power off. Some instruments have a “Standby” mode, in which power is still supplied to the instrument. For the purpose
of clearing data, putting the instrument in Standby mode does not qualify as powering off. For these products, you will
need to either press a rear-panel OFF switch or remove the power source from the instrument.
• Remove. This is a physical means to clear the data by removing the memory device from the instrument. Instructions
are available in the product service manual.
• Sanitize. This eradicates the data from media/memory so that the data cannot be recovered by other means or
technology. This is typically used when the device is moved (temporarily or permanently) from a secured area to a nonsecured area.
• User Accessible. User is able to directly retrieve the memory device contents.
• User-modifiable. The user can write to the memory device during normal instrument operation, using the instrument
interface or remote control.
• Nonvolatile memory. Data is retained when the instrument is powered off.
• Volatile memory. Data is lost when the instrument is powered off.
TCR801 Optical Clock Recovery Declassification and Security Instructions 4
Clear and sanitize procedures
Memory devices
The following tables and procedures identify volatile and non-volatile memory devices in the TCR801 instrument and how to
clear and/or sanitize them.
Terms
The following terms are used in the tables in this section:
• User data. Describes the type of information stored in the device. Refers to waveforms or other measurement data
representing signals connected to the instrument by users.
• User settings. Describes the type of information stored in the device. Refers to instrument settings that can be changed
by the user.
• None. Describes the type of information stored in the device. It means that neither user data or user settings are stored
in the device.
• Directly. Describes how data is modified. It means that the user can modify the data.
• Indirectly. Describes how data is modified. It means that the instrument system resources modify the data and that the
user cannot modify the data.
Clear and sanitize procedures
Volatile memory devices
Table 1: Volatile memory devices
Type &
min.
size
DRAM
2 GB
Function Type of
Holds OS
Processes
Nonvolatile memory devices
Table 2: Nonvolatile memory devices
Type &
min. size
FRAM 32KBMCU system
Table continued…
Function Type of user
memory
Backed
user
info
stored
None Yes Indirectly Written byOSDigital board No Remove
up by
battery?
info stored
None None Factory
Method of
modification
Method of
modification
Data
input
method
Data Input
method
configuration,
written by
processor
system
Location User accessible To clear /
sanitize
power from
the
instrument
for at least 5
mins
Location User
accessible
Digital
board
No Not applicable, does
To clear / sanitize
not contain user
data or settings.
Clearing would
disable instrument
functionality.
TCR801 Optical Clock Recovery Declassification and Security Instructions 5
Clear and sanitize procedures
Type &
min. size
NAND
storage
16 GB
NOR
flash
memory
512 MB
Function Type of user
info stored
OS system
storage
FPGA
configuration
files
The internal
logs store user
datarates, loop
bandwidths,
and input
power
information.
None JTAG port on
Media and data export devices
Method of
modification
Default value
saving via GUI
and
Manufacturing
backdoor
commands
board
Data Input
method
Factory config,
written by user
via GUI and
manufacturing
backdoor
commands
Factory
configuration
Location User
accessible
Digital
board
Digital
board
Yes Send a
No Not applicable, does
To clear / sanitize
CREC:RESET
command to clear
user defaults. To
clear internal logs,
power cycle the unit
6 times using the
front panel button.
Manufacturing /
Service can clear
everything else like
calibration if
required.
not contain user
data or settings.
Clearing would
disable instrument
functionality.
The following table lists the data export devices in the instrument. Detailed procedures to disable these devices, if any, are
shown in the following table.
Table 3: Media storage / Data export disable
Type Function Method of
modification
USB device port Supports
remote control
and data
transfer to a
PC.
LAN Ethernet
connector
Transfer data Directly N/A Rear panel,
Directly Remote control
Data input
method
via USBTMC
Location User
accessible
USB device port
on rear of
instrument.
AFG3100 series
only
- The USB device
- N/A
To disable
port cannot be
disabled.
TCR801 Optical Clock Recovery Declassification and Security Instructions 6
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