Specifications

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User and remote interface security measures
Screen and annotation blanking
You can prevent frequency information from appearing on the PNA screen and printouts.
To set security levels from the PNA menu, click System, then Security. When the security
levelissettoLoworHigh,frequencyinformationisblankedfromthefollowing:
• Displayannotation
• Calibrationproperties
• Alltables
• Alltoolbars
• Allprintouts
• GPIBconsole–WhensettoNone or Low, nothing is blanked. When set to High,
the GPIB console is inactive.
Frequency information is NOT blanked from the following regardless of security level:
• Thefrequencyconverterapplication(Option083)dialogboxinformationorprintouts.
• Serviceprograms.
• YourCOMorSCPIprograms.
USB mass storage device security
To prevent USB write capability on XPSP2, create a new registry key of:
HKLM\System\CurrentControlSet\Control\StorageDevicePolicies.
Then create a REG_DWORD entry in it called WriteProtect. Set it to “1” and you’ll be
able to read from USB drives but not write to them.
Remote access interfaces
The user is responsible for providing security for the I/O ports that allow remote access
by controlling physical access to the I/O ports. The I/O ports must be controlled
because they provide access to all user settings, user states and the display image.
TheI/OportsincludeRS-232,GPIB,andLAN.
TheLANportprovidesthefollowingservices,commontoallWindows-basedcomputers,
which can be selectively disabled:
• http
• ftp
• sockets
• telnet
There is also a ‘ping’ service, which cannot be selectively disabled. This makes it
possible to discover IP addresses of connected instruments and allows you to query
their setups over the internet, but it can also be used to break into the code.