## 16.1. Basic Settings Tab

The Basic Settings tab defines the coordinate frame and the point coordinates for the source point.

1. Enter Cartesian Coordinates for the source point.

   Points entered are relative to the selected coordinate frame.

2. Use the default coordinate frame or a user-specified coordinate frame. For details, see:

   - Coordinate Frames in the CFX-Solver Modeling Guide

   - Coordinate Frame Basic Settings Tab.

The default coordinate frame, `Coord 0`, will be used as the basis for the entered Cartesian coordinates, unless you have created your own coordinate frame and have selected it from the drop-down list.

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