Spectrum Masterâ„¢ Handheld Spectrum Analyzer User Guide : Instrument Overview : Instrument Front Panel : LED Indicators
 
LED Indicators
Power LED
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.
Charge LED
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.
Front Panel Keys
The numeric keypad, rotary knob, and the four arrow keys can all be used to change the value of the currently selected parameter.
Numeric Keypad
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.
Shift Key
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.
Shift Key Icon in Title Bar
Esc Key
Press this key to cancel the parameter change being made and exit the current menu function, if applicable.
Arrow Keys
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.
Enter Key
Press this key to apply a parameter value or instrument setting you have entered, or to select a highlighted item from a list.
Rotary Knob
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.
Menu Key
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.
Menu Key Screen
Note 
Shortcut icons displayed in the top rows of the Menu screen vary with the instrument model, firmware version, and installed options. Help for the Menu screen is available by pressing the icon in the lower-right corner of the display.
User-Created Shortcuts
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.
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.
Customize Button Dialog
Press Esc to close the dialog without deleting or moving the shortcut. Also use Esc to exit the Menu screen.