Clear and Sanitize Procedures
Memory Devices
The following tables list the volatile and nonvolatile memory devices in the
standard instrument and listed options.
Table 1: Volatile Memory Devices
Type and
minimum size Function
User
Modifiable
Input
method Location Process to clear
SDRAM (2)
16M x 16
System Memory
No Written
by
system
processor
Y400 processor board
Remove power from the
instrument for at least
20 seconds
SRAM (3)
256K x 16
DSP program and data
memory
No
Read/write
by DSP
processor
YBT250 digital signal processor board
YBA250 digital signal processor board
Power down the module
by exiting YBT250 or
YBA250 application
SRAM,
512K x 18
Acquisition memory No
Read/write
by DSP
processor
YBT250 digital signal processor board
YBA250 digital signal processor board
Power down the module
by exiting YBT250 or
YBA250 application
Table 2: Nonvolatile Memory Devices
Type and
minimum size Function
User
Modifiable
Input
method Location Process to clear
USB floppy disk drive
Holds user-storable data
such as measurement
results and instrument
settings
Yes
Plugs into Y400 USB port Remove the floppy disk
from the drive. Refer to
your organization’s
internal policies
regarding handling
or disposal of the floppy
disk.
M_System
DiskOnChip
32M x 8
File System
Yes User
input
Y400 Processor board
System reset
Flash (2)
16M x 8
Operating system and
register settings
Yes User
input
Y400 Processor board
System reset
EEPROM
128K x 8
Ethernet (Y400); storing
internal calibration data
(YBT250)
No Factory
programmed
Y400 Processor board
YBA250 RF/Analog board
Store the instrument
or module in a secure
area, or destroy the
instrument or module
Flash
8M x 16
Storing program
executable, error logging
and calibration constants
No Factory
programmed,
software
updates,
and
used by
application
YBT250 digital signal processor board
YBA250 digital signal processor board
Store the module in a
secure area, or destroy
the module
EEPROM (2)
32K x 8
Storing internal
calibration data
No Written
during
factory
or
service
calibration
YBT250 RF/Analog board Store the module in a
secure area, or destroy
the module
Revision A
NetTek Y400, NetTek YBT250, and NetTek YBA250 Declassification and Security 1