Security Features and Document of Volatility             20
Instrument Memory & Volatility
Volatile Memory
5. SDRAM
2_GByte
Yes No Contains measurement 
data from data 
acquisition system.
Programmed by 
firmware. Not 
accessible by user.
A23 Digital IF
(Option B5X)
Contains raw 
measurement 
data.
Turn off 
instrument 
power.<Keysig
ht Red>
a
a. This memory is not battery backed-up or connected to standby power.
Table 4-3  Summary of Volatile 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
Sanitization 
Procedure