# Versus Operators

The Versus (X vs. Y) math operator plots the source 1 amplitude on the vertical Y-axis and the source 2 amplitude on the horizontal X-axis. You can use Versus to compare frequency and phase relationships between two signals. When scaling (vertical and horizontal) is set to Auto , the instrument automatically selects vertical scale, offset, horizontal scale, and position to view the entire function on the display screen. The function then tracks any scale, offset, or position changes you make to the source waveform. If you set the scaling (vertical and horizontal) to Manual, you can define a different scale, offset, and position than the original source waveform. The function will not track any changes you make to the source waveform.

You can apply a constant to the Versus operator.

The X and Y values displayed in the marker values tab are the values of the amplitudes of the two sources used for the function.

When you switch to manual marker mode, the values displayed in the X and Y marker control boxes are the amplitudes of the two sources used for the function.

## 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.