R&S
®
NGM/NGL
Types of Memory and Information Storage
Instrument Security Procedures 3662.9729.02
5
from this memory meets the memory sanitization requirements specified in the
"Clearing and Sanitization Matrix" in Section 5.2.5.5.5 of the ISFO Process Manual for
the Certification and Accreditation of Classified Systems under the NISPOM.
Main Processor Internal Caches and Memory
The NGM/NGL series have internal caches and memory in its main processor on the
front controller board. These contain startup and operating instructions, operating data
and states that are critical to device performance and operation. Turning off instrument
power will remove user data in the main processor.
Sanitization procedure:
Turn off instrument power
SDRAM
The NGM/NGL series has two DDR3 SDRAM memory devices with 2 Gbit each. They
contain instructions and data for the operating system and device applications,
including measurement and display data, when the power supply is running.
SDRAM loses its memory as soon as power is removed.
Sanitization procedure:
Turn off instrument power
SRAM
The NGM/NGL series has up to four 32 KByte SRAM devices which are integrated in
the power supply’s channel microcontrollers. The SRAMs contain the control and
status/operating data of the channel control firmware and loses its memory as soon as
power is removed.
Sanitization procedure:
Turn off instrument power
4.2 Non-Volatile Memory
The R&S NGM/NGL series contain non-volatile flash memories. User data can be
removed from these memories with the Secure Erase procedure.
eMMC Flash
The R&S NGM/NGL series has one 4 GByte flash memory on the front controller board
that contains board and device IDs, the instrument firmware and the factory calibration
data. In addition, this flash memory stores all the instrument settings, the instrument
state, and user data. The flash can hold user data and is non-volatile
.
Hence, user data
is not erased when power is removed from the instrument. The R&S NGM/NGL series
provides a sanitizing procedure that ensures that user data is irretrievably removed
from the instrument.
Sanitization procedure:
Secure Erase procedure (see Chapter 5, "Secure Erase
Procedure", on page 5)
