Table of Contents
Advertisement
Basic Operation
Using Security Functions
Table 2-2 Base Instrument Memory
Memory
Type
and Size
Main
Yes
No
Memory
(SDRAM)
64 MB
Main
Yes
Yes
Memory
(Flash)
20 MB
Firmware
No
Yes
Memory
(Flash)
12 MB
Yes
Yes
Battery
Yes
Yes
Backed
Memory
(SRAM)
512 kB
Bootrom
No
Yes
Memory
(Flash)
128 kB
66
Purpose/Contents
Data Input Method Location in Instrument and Remarks
firmware operating
operating system
memory
(not user)
factory
firmware upgrades
calibration/configuration
and user–saved
data
data
user file system, which
includes instrument
status backup, flatness
calibration, IQ
calibration, instrument
states, waveforms
(including header and
marker data), modulation
definitions, and sweep
lists
main firmware image
factory installed or
firmware upgrade
LAN configuration
front panel entry or
remotely
user–editable data (table
firmware operations CPU board
editors)
last instrument state, last
instrument state backup,
and persistent
instrument state and
instrument status
CPU bootup program and
factory programmed CPU board
firmware loader/updater
CPU board, not battery backed.
CPU board (same chip as firmware memory, but
managed separately)
User data is not stored in this memory if hard
disk (Option 005) or the removable compact flash
drive (Option 008 or 009) is installed.
Because this 32 MB memory chip contains 20 MB
of user data (described here) and 12 MB of
firmware memory, a selective chip erase is
performed. User data areas are selectively and
completely sanitized when you perform the Erase
and Sanitize function.
CPU board (same chip as main flash memory, but
managed separately)
During normal operation, this memory cannot be
overwritten except for LAN configuration. It is
only overwritten during the firmware installation
or upgrade process.
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 when you perform the Erase
and Sanitize function.
The battery can be removed to sanitize the
memory, but must be reinstalled for the instrument
to operate. The battery is located on the CPU
board.
During normal operation, this memory cannot be
overwritten or erased. This read–only data is
programmed at the factory.
Chapter 2
Hide quick links:
Advertisement
Table of Contents
