68 Chapter 2
Basic Operation
Using Security Functions
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 (Option 005)
a
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)
6 GB 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
a.Instruments with serial prefix < US4829/SG4829/MY4829.
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
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