
24
Instrument Memory & Volatility
ESG and PSG Memory
3. Firmware
Memory
(Flash)
12 MByte
No
Yes
Main firmware image
Factory
installed or
firmware
upgrade
CPU board
(same chip as
main flash
memory, but
managed
separately)
During normal
operation,
this memory
cannot be
overwritten
except for
LAN
configuration.
Because this
32 MB memory
chip contains
20 MB of user
data and 12 MB
of firmware
memory
(described
here), a
selective chip
erase is
performed.
User data areas
are selectively
and completely
sanitized by the
procedure
“Erase and
Sanitize All” on
page 32
.
Yes
Yes
LAN configuration
Front panel
entry or
remotely
4. Battery
Backed
Memory
(SRAM)
512 KByte
Yes
Yes
User-editable data
(table editors)
Last instrument state,
last instrument state
backup, and
persistent instrument
state and instrument
status
Firmware
operations
CPU board
The battery is
located on the
motherboard
for the ESG
and on the
CPU board for
the PSG.
Sanitized by the
procedure
described in
“Erase and
Sanitize All” on
page 32
.
5. Bootrom
Memory
(Flash)
128 KByte
No
Yes
CPU bootup program
and firmware
loader/updater
Factory
programmed
CPU board
During normal
operation,
this memory
cannot be
overwritten or
erased.
None required
(no user data)
Table 5-5
Base Instrument (All models and options)
Memory
Component,
Type and Size
W
rit
able During
Normal Operatio
n?
Data Retained
When
Powered Off?
Purpose/Contents
Data Input
Method
Location in
Instrument
and Remarks
Sanitization
Procedure
a
Содержание N5171B
Страница 4: ...4 ...
Страница 6: ...6 Contents ...
Страница 8: ...8 Contacting Agilent Sales and Service Offices ...
Страница 12: ...12 Products Covered by this Document Recommended Software Upgrades ...
Страница 14: ...14 Security Terms and Definitions ...
Страница 38: ...38 Using Secure Display ...
Страница 42: ...42 Security Issues for Certain Firmware Revisions Recovering Erased System Files ...
Страница 46: ...46 Procedure for Declassifying a Faulty Instrument ...