Agilent Technologies E4406A manual Measurement Control, Measurement Setup, Averaging

Making Measurements

Preparing for Measurements

Measurement Control

Following your selection of the instrument mode and mode setup you will use keys in the Meas Control keys to control processes that affect the running of the current measurement.

•Measure - Toggles between Single and Cont (for continuous) measurement states. When set to Single the measurement will continue until it has reached the specified number of averages set by the average counter. When set to Cont the measurement will run continuously, and perform averaging according to the current average type (repeat or exponential). The default is continuous. See page 90 for an explanation of averaging.

•Pause - Pauses the current measurement. Once toggled, the label of the Pause key changes to read Resume. Measurement settings can be change while it is paused. The Resume key continues the active measurement from the point at which it was paused.

•Restart re-initiates the current measurement from the beginning (including averaging), without changing the current measurement settings. If the measurement is paused, then restart is the same as resuming from the beginning of the measurement instead of from the point at which it was paused.

Measurement Setup

The Meas Setup key accesses features that enable you to adjust parameters of the current measurement, such as resolution bandwidth. You will also use the Meas Setup menu to access Average, Trig Source, and Advanced measure setup feature menus.

The following features can be used with many measurements:

•Res BW - Changes the resolution bandwidth of a given measurement. Selection of a narrower bandwidth will result in a longer data acquisition time.

•Restore Meas Defaults - Presets only the settings that are specific to the selected measurement. This will set the measure setup parameters to the factory defaults, only for the currently selected measurement.

Averaging

Features in the Average menu allow you to modify the number, average mode, and type of averaging you use for the currently selected measurement. The features available for averaging will vary slightly depending on the measurement that is currently active. On the display averaged trace results are shown in blue, while the instantaneous signal is shown in yellow.

90 Chapter 4