R3131 Spectrum Analyzer Operation Manual - Dudleylab.com

R3131 Spectrum Analyzer Operation Manual2.2 Basic Operation2.2 Basic Operation2.2.1 Operating Menus and Entering DataYou use panel keys and soft keys to operate the spectrum analyzer. When you press a panel key, a menuis usually displayed on the right side of the screen. However, there are some keys, such as AUTO TUNEand COPY, which do not have an associated soft menu.Each menu selection is aligned with a soft key. To make a menu selection, press the associated soft key.In some cases, pressing the soft key displays additional selections. The following example shows how thepanel and soft keys function.(1) Selecting the MenuPress LEVEL to display the menu used for setting up a measurement.A reference line value is displayed in the active area, and the Level menu is displayed on the rightside of the screen as shown below.Ref LevelATT AUTO/MNLdB/divLinearUnitsRef Offset ON/OFF(2) Entering DataWhen a value is displayed in the active area, you can change it using the numeric keys, the step keys,or the data knob.• Entering Data Using the Numeric KeysYou use the following keys to enter data: the number keys (0 through 9), the decimal point key,and the backspace (BK SP) or minus (-) key. If you make a mistake when using the numerickeys, you can use the backspace (BK SP) key to delete the last digit entered. If you have notentered any data, pressing the BK SP key enters a minus (-) sign. After entering the data, pressingthe ENTER key or one of the other unit keys completes the operation.NOTE: Data entered with the numeric keys that is not terminated with a units terminator is abortedwhen you press any panel key.Example: The following example sets the reference level to -20 dBm using the numeric keys:Press the -, 2, 0 and GHz (+dBm) keys or the 2, 0 and MHz (-dBm) keys.• Entering Data Using the Step KeysThe step keys are used to enter data by a predefined step size. Press the step key to decrementthe data; press the step key to increment the data. You can enter data while looking at the activearea on the screen using the step keys. You can also define the step size manually.Example: The following example sets the reference level to 0 dBm using the step keys:Press the step key. This sets the reference level to -10.0 dBm. If you press thestep key once more, the level is set to 0.0 dBm.2-14 Apr 10/98