Average Operator

The Average math operator stores (in the function) the average waveform value acquired in each time bucket in the source. To set the number of time buckets included in the running average, click on the operator icon. This opens the Average Setup dialog box. The default number of averages is 16.

The average value results are recalculated when any of the following occurs:

• Time base scale, position, or reference is changed
• Channel scale or channel offset is changed
• Trigger definition is changed
• Record length is changed
• Additional data is stored to a waveform memory that is used as part of a function
• Clear on the menu bar is clicked

Display Setup

Each operator's setup includes a Setup section that has the selections that are shown in the following generic setup dialog box. Use these settings to control the display of the operator's output waveform, including turning the display on or off. Use the Name field to display an identifying name to the waveform which can be helpful for screen captures or when multiple waveforms are displayed. The settings also include the output waveform's color, scaling, and signal type. The scaling Automatic selection allows the output waveform to track changes to the scaling of the input waveform. This is the setting that you would normally want to use.

The signal Pattern can be used for BER (Bit Error Ratio), SNDR (Signal to Noise and Distortion Ratio), and other measurements. You can specify the math function has the same pattern as the input waveform (Track Input), Auto Detect the pattern, choose a Known Pattern from a list, or specify your own pattern using a Pattern File.