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62 Chapter 2
Basic Operation
Using Security Functions
BBG
Firmware
Memory
(Flash)
32 MB
No Yes firmware image for
baseband generator
firmware upgrade
Coprocessor
Memory
(SRAM)
32 MB
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.
Buffer
Memory
(SRAM)
5 x 512 kB
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.
Table 2-4 Hard Disk Memory
Memory
Type
and Size
Writable During
Normal Operation?
Data Retained
When Powered Off?
Purpose/Contents Data Input Method Remarks
Media
Storage
(Built-in
Hard Disk)
6GB or
10 GB
(4 GB usable
in both
cases)
Yes Yes user files, including flatness
calibrations, IQ calibration,
instrument states,
waveforms (including header
and marker data),
modulation definitions, and
sweep lists
user-saved data The magnetic residue requires several rewrite
cycles or drive removal and destruction.
The hard disk is an option and is therefore
not installed in some instruments. If it is
installed, these files are stored on the hard
disk instead of in flash memory.
User data is completely sanitized when you
perform the
Erase and Sanitize function.
Buffer
Memory
(DRAM)
512 kB
No No buffer (cache) memory normal operation
through hard disk
Table 2-3 Baseband Generator Memory (Options 601 and 602) (Continued)
Memory
Type
and Size
Writable During
Normal Operation?
Data Retained
When Powered Off?
Purpose/Contents Data Input Method Remarks