The TRACE keys give access to all trace settings and the functions to select, modify and store different traces. In addition the menu provides the marker, search and limit check functions.

The CHANNEL keys give access to all channel settings and the functions to activate, modify and store different channels.

The DISPLAY keys give access to all display settings and to the functions to activate, modify and arrange different diagram areas.

The SYSTEM keys give access to the functions to return to a defined instrument state and select general system settings.

A second group of keys (uncolored) provides standard Windows™ functions to save, recall or print setups and call up the measurement wizard.

The SUPPORT keys give access to the functions to reverse operations, retrieve information on the instrument and obtain assistance.

A second group of keys (uncolored) is used to navigate within the graphical user interface:

• MENU sets the cursor to the first item (File) in the menu bar of the active application (network analyzer or help system) if no dialog is open. In the network analyzer (NWA) application, menus are equivalent to softkeys and provide fast access to all instrument functions. The menus in the help system are required for accessing all help functions by means of the front panel keys. In NWA dialogs, the MENU key opens the control menu to move or close the dialog.

• The Windows key opens the startup menu of Windows XP Embedded from where it is possible to perform system configurations and call up additional software utilities.