Keysight MXG A Series - Page 18

Security Features & Document of Volatility 18
Instrument Memory & Volatility
ESG Memory
Table 4-5 Hard Disk (E4438C with Option 005)
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
1. Media Storage
(Built-in Hard
Disk)
6 GByte or
10 GByte
(4 GByte 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 hard disk is
an option for
vector
instruments
(E4438C Option
005) 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.
The magnetic
residue requires
several rewrite
cycles or drive
removal and
destruction.
User data is
completely
sanitized by the
procedure “Erase
and Sanitize All
(Option 006 Only)”
on page 22.
2. Buffer Memory
(DRAM)
512 KByte
No No Buffer (cache) memory Normal
operation, via
hard disk
Turn off
instrument power.