Agilent Technologies N5182A User Manual

134 Agilent N5181A/82A MXG Signal Generators User’s Guide
Working in a Secure Environment
Understanding Memory Types
Understanding Memory Types
The signal generator has several memory types, and each is used to store a specific type of data.
Before removing sensitive data, you should to understand how each memory type is used. The
following tables describe each memory type used in the base instrument, and optional baseband
generator.
Table 10-1 Base Instrument Memory
Memory
Type and
Size
Writable During Normal Operation? Data Retained When Powered Off?
Purpose/Contents Data Input Method Location in Instrument and Remarks
Main
Memory
(RAM)
32 MB
Yes No firmware operating
memory
no user data
operating system CPU board
Main
Memory
(Flash)
8 MB
Yes Yes fact or y
calibration/configuration
data
a
user file system, which
includes flatness
calibration, instrument
states, and sweep lists
firmware upgrades
and user- saved data
a
CPU board (same chip as firmware memory, but
managed separately)
Because this memory chip contains 8 MB of user
data (described here) and 8 MB of firmware
memory, a full- chip erase is not desirable. User
data areas are selectively and completely sanitized
when you perform the Erase and Sanitize function.
Firmware
Memory
(Flash)
8 MB
No Yes main firmware image factory installed or
firmware upgrade
CPU board (same chip as main flash memory, but
managed separately)
During normal operation, this memory cannot be
overwritten. It is only overwritten during the
firmware installation or upgrade process.
Because this memory chip contains 8 MB of user
data and 8 MB of firmware memory (described
here), a full- chip erase is not desirable. User data
areas are selectively and completely sanitized
when you perform the Erase and Sanitize function.
Bootrom
Memory
(EEPROM)
8 kB
No Yes CPU bootup parameters
no user data
factory programmed CPU board
During normal operation, this memory cannot be
overwritten or erased. This read- only data is
programmed at the factory.
Calibration
Data
(Flash)
256 kB
No Yes factory
calibration/configuration
data backup
no user data
factory or service only RF Board
LCD
Display
Memory
(RAM)
160 kB
No No display buffer operating system RF board

Agilent Technologies N5182A Specifications

General

Brand	Agilent Technologies
Model	N5182A
Category	Portable Generator
Language	English