Security Features & Document of Volatility 16
Instrument Memory & Volatility
ESG Memory
7. Boards
Memory
(Flash)
512 Bytes
No Yes Factory calibration and
information files, code
images, and self-test
limits
Factory or
service only
All RF boards,
baseband
generator, and
motherboard
None required (no
user data)
8. Micro-
processor Cache
(SRAM)
3 KByte
Yes No CPU data and instruction
cache
Memory is
managed by
CPU, not user
CPU board, not
battery backed.
Turn off
instrument power.
Table 4-4 Vector Models with Baseband Generator (E4438C with Options 601 or 602)
Memory
Component,
Type and Size
Writable During Normal
Operation?
Data Retained When
Powered Off?
Purpose/Contents Data Input
Method
Location in
Instrument and
Remarks
Sanitization
Procedure
1. Waveform
Memory
(SDRAM)
40 MByte
320 MByte
Yes No Waveforms (including
header and marker data)
and PRAM
Normal user
operation
Not battery
backed.
User data is
completely
sanitized by the
procedure “Erase
and Sanitize All
(Option 006 Only)”
on page 22.
2. BBG Firmware
Memory
(Flash)
32 MByte
No Yes Firmware image for
baseband generator
Firmware
upgrade
None required (no
user data)
Table 4-3 Base Instrument (All models and options)
Memory
Component,
Type and Size
Writable During Normal
Operation?
Data Retained When
Powered Off?
Purpose/Contents Data Input
Method
Location in
Instrument and
Remarks
Sanitization
Procedure
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