Types of Memory and Information Storage in the R&S ZVH
R&S
®
ZVH
5Instrument Security Procedures 1178.4324.02 ─ 02
Measurement - SRAM
The main board of the R&S ZVH Cable and Antenna Analyzer has one 2 Mbyte SRAM
memory device which contains intermediate measurement data.
A second 256 kbyte SRAM memory device on the main board contains the measure-
ment control data.
The SRAM loses its memory as soon as the instrument is switched off and the sepa-
rate power supply unit power is removed.
Sanitization procedure: Turn off instrument power and remove the separate power
supply unit
4.2 Non-Volatile Memory
The R&S ZVH contains various non-volatile memories. Out of these, the SRAM and
flash contain user data. Both can be sanitized via master preset procedure.
All non-volatile memories of the R&S ZVH are not a security concern.
EEPROM
The front-end board of the R&S ZVH Cable and Antenna Analyzer has one EEPROM
device with a size of 32 kbyte. The EEPROM contains information related to the instal-
led hardware, such as board serial number, product options and calibration correction
data. The EEPROM does not hold user data nor can the user access the EEPROM
storage.
Sanitization procedure: None required (no user data)
SRAM
The main board of the R&S ZVH Cable and Antenna Analyzer has one SRAM memory
device which holds 1 Mbyte or 8 Mbyte (depending on the spectrum analyzer model).
This SRAM device contains the active instrument and measurement setup and the cur-
rent measurement data. The SRAM can contain user data and is backed-up by the bat-
tery of the Cable and Antenna Analyzer. Therefore, the SRAM does not lose its infor-
mation when power is removed and must be cleared before leaving the secured area.
Sanitization procedure: Master preset procedure (see Chapter 5, "Instrument Declas-
sification", on page 6)
Flash
The main board of the R&S ZVH Cable and Antenna Analyzer has one flash device.
This device holds 4 Mbyte or 8 Mbyte (depending on the Cable and Antenna Analyzer
model) and can contain user data.
The flash contains the following information:
●
Instrument firmware
Non-Volatile Memory
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