
Chapter 1 31
E5500 Phase Noise Measurement System Product Security
70428A Opt 002, N5508A Opt 002 25.8 GHz Tunable Microwave Source
Instrument memory
70428A Opt 002, N5508A Opt 002 25.8 GHz
Tunable Microwave Source
Instrument memory
Summary of instrument memory
The 70428A/002 and N5508A/002 tunable microwave sources do not store any measurement parameters
while in the power off state.
Memory
Type and
Size
Writable During
Normal Operations?
Data Retained
When Powered
Purpose/
Contents
Data Input
Method
Location in
Instrument and
Remarks
Sanitization
Procedure
Volatile
Memory
DRAM
128 KB
Yes No Stores current
measurement state
for the 70428A/002
and N5508A/002
Mw Source
User
Modifiable
A6 PS/Controller
board
Cycle power
Non-Volatile
Memory
EEPROM
2 KB
No Yes Stores model #,
serial #, options,
calibration constants
during calibration
Non - User
Modifiable
A6 PS/Controller
board
Not required, no
measurement
data present
Non-Volatile
Memory
EPROM
1 MB
No Yes Firmware for
instrument operation
Non - User
Modifiable
A6 PS/Controller
board
Not required, no
measurement
data present
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