Technical data

26
Instrument Memory & Volatility
ESG and PSG Memory
2. BBG
Firmware
Memory
(Flash)
32 MByte
No Yes Firmware image for
baseband generator
Firmware
upgrade
None required
(no user data)
3. Coprocessor
Memory
(SRAM)
32 MByte
Yes No Operating memory of
baseband
coprocessor CPU
During
normal
operation,
some user
information,
such as
payload data,
can remain
in the
memory.
This memory
is used during
normal
baseband
generator
operation. It is
not directly
accessible by
the user.
Not battery
backed.
Turn off
instrument
power.
4. Buffer
Memory
(SRAM)
5 x 512 KByte
No No Support buffer
memory for ARB and
real-time applications
Normal user
operation
This memory
is used during
normal
baseband
generator
operation. It is
not directly
accessible by
the user.
Not battery
backed.
Turn off
instrument
power.
Table 5-6 Vector Models with Baseband Generator (E4438C/E8267D 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