Technical data

23
Instrument Memory & Volatility
ESG and PSG Memory
ESG and PSG Memory
The following tables describe each memory type used in the base instrument, optional baseband generator,
optional hard disk and option flash drive.
Table 5-5 Base Instrument (All models and options)
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
a
1. Main
Memory
(SDRAM)
64 MByte
Yes No Firmware operating
memory
Operating
system (not
user)
CPU board.
Not battery
backed.
Turn off
instrument
power.
2. Main
Memory
(Flash)
20 MByte
Yes Yes Factory calibration/
configuration 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
Firmware
upgrades
and
user-saved
data
CPU board
(same chip as
firmware
memory, but
managed
separately)
User data is
not stored in
this memory if
hard disk
(Option 005)
or flash drive
(Option
008/009) 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 by the
procedure
“Erase and
Sanitize All” on
page 32.