Security Features and Document of Volatility             15
Instrument Memory & Volatility
Non-Volatile Memory
25. Spartan6 
configuration 
memory
8 Mbit Flash
No Yes Contains measurement 
and control software, 
which is preloaded into 
Spartan6 FPGA during 
instrument power-up.
Programmed 
before installation
A14 Synthesizer 
Assy
Contains no 
user data
None
26. Config & Cal 
Memory 
8 kbit EEPROM
No Yes Header EEPROM used to 
identify the assembly.
Programmed 
before installation.
A15 Front End 
Control Assy
Contains no 
user data.
None
27. Config 
Memory 
2 Mbit Flash
No Yes Contains measurement 
and control software, 
which is preloaded into 
FPGA during instrument 
power-up. Primarily YTF, 
attenuator, and front end 
switch control.
Programmed 
before installation.
A15 Front End 
Control Assy
Contains no 
user data.
None
28. Config & Cal 
Memory 
8 kbit EEPROM
No Yes Header EEPROM used to 
identify the assembly.
Programmed 
before installation.
A16 Reference 
Assy
Contains no 
user data.
None
29. FPGA Config 
Memory
2 Mbit Flash
No Yes Contains measurement 
and control software.
Programmed 
before installation.
A16 Reference 
Assy
Contains no 
user data.
None
30. Digital 
Potentiometer
112 bits EEPROM
No Yes Contains default data to 
preset digital 
potentiometers during 
power-up. 
Programmed 
before installation.
A16 Reference 
Assy
Contains no 
user data.
None
31. Config & Cal 
Memory 
8 kbit EEPROM
No Yes Header EEPROM used to 
identify the assembly.
Programmed 
before installation.
A16A1 
Reference 
Daughter Assy
Contains no 
user data.
None
Table 4-1  Summary of Non-Volatile instrument memory
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