Rohde & Schwarz ZNH, Manual

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Statement of Volatility
R&S
®
ZNH
9 Instrument Security Procedures 1334.6000.02 ─ 01
4 Statement of Volatility
The R&S ZNH contains various memory components. See the subsequent sections for
a detailed description regarding type, size, usage and location.
Notes on memory sizes
Due to the continuous development of memory components, the listed values of mem-
ory sizes may not represent the current, but the minimal configuration.
4.1 Volatile Memory
Volatile memory modules are considered as non-accessible internal memory devices,
as described in
Security Terms and Definitions > Volatile Memory . It requires power to
retain data and when the power is turned off, all data is erased.
Table 4-1: Types of volatile memory
Memory type Location Size Content User
data Sanitization procedure
SDRAM Mainboard 512 Mbyte Temporary information storage for
operating system and instrument firm-
ware Yes Turn off instrument power
and remove the battery.
See Instrument Sanitiza-
tion Procedure
SRAM Frontboard
(µController internal)
4 kbyte Temporary information storage for
power-up / power-down firmware. No
4.2 Non-Volatile Memory
Non-volatile memory modules are considered as non-accessible internal memory devi-
ces, as described in
Security Terms and Definitions > Non-volatile Memory . It does not
require power to maintain the stored data.
Table 4-2: Types of non-volatile memory
Memory type Location Size Content User
data Sanitization procedure
Flash Frontboard
(µController internal)
32 kbyte Power-up / power-down firmware No None required (no user
data)
Flash Mainboard 128 Mbyte
●
Operating system
●
Instrument firmware
●
Boot code
●
Calibration correction data,
device options and serial number
●
User data and instrument set-
tings
Yes See Instrument Sanitiza-
tion Procedure
Non-Volatile Memory