The Power LED is located on the left of the On/Off button. The LED is solid green when the instrument is on, and blinks slowly when the unit is off but is connected to an external power source.

The Charge LED is located on the right of the On/Off button. The LED blinks slowly when the battery is charging and is solid green when the battery is fully charged.

The numeric keypad, rotary knob, and the four arrow keys can all be used to change the value of the currently selected parameter.

Keys 0 through 9 are used for numeric input, with an alternate function printed in blue above each of the keys. Press the Shift key, then a numeric key, to access the instrument menu or function indicated by the key label.

Some of the alternate functions associated with the numeric keypad are not available in all measurement modes. Refer to the Measurement Guides listed in Measurement Guides.

Pressing the Shift key followed by a number key executes the function that is indicated in blue above the number key. When the Shift key is active, its icon is displayed at the far right of the title bar, above the sweep window.

Press this key to cancel the parameter change being made and exit the current menu function, if applicable.

The four arrow keys are used to scroll through a list and highlight the item you wish to select, or to change the value of the currently selected parameter. The arrow keys can also be used to move markers. The rotary knob performs similar functions.

Press this key to apply a parameter value or instrument setting you have entered, or to select a highlighted item from a list.

Turn the rotary knob to change numerical values, scroll through selectable items in a list, or to move markers. Values or items may be within a dialog box or an edit window.

The Menu key displays a grid of shortcut icons for installed measurement modes and user-selected menus and setup files. See Figure: Menu Key Screen. Press one of the icons in the top three rows to switch to the corresponding application. These icons are system-generated and cannot be moved or deleted.

An alternative to the Menu key is to press Shift, then the Mode (9) key to display the Mode Selector list box. Refer to Mode Selector.

To create a shortcut to any submenu key or main menu key, press and hold the key until a grid appears, showing the open locations on the Menu screen where you can place the new shortcut. Press one of the cells in the displayed grid to place the shortcut. See Figure: Placement Grid for User-Created Shortcuts.

To create a shortcut to a setup file (.stp), press Recall under the File menu, then press and hold the desired file name until a grid is displayed. Select the display location of the new shortcut as described above.

User-defined shortcuts remain on the Menu screen until deleted. To delete or move a shortcut icon, press the Menu key, then press and hold the shortcut until the Customize Button dialog appears. See Figure: Customize Button Dialog. Press the appropriate button to delete or move the shortcut icon.

Press Esc to close the dialog without deleting or moving the shortcut. Also use Esc to exit the Menu screen.