The Screen Utility helps you to determine AR, the aspect ratio, for your monitor. This will enable you to create a decent looking Smith Chart.


When you choose "(4) Screen Utility" from the Main Menu, either by pressing "4," or by using the "F4" function key, you'll enter the Screen Utility. What you will see depends on the choice you made when you ran the Startup Utility. For example, if you selected "6," for a Windows display, the screen display should look as follows:


The circle on the screen was made using the nominal AR for a Windows display, which, in this instance, is 0.75.

If the circle you see on your screen is ovalled, carefully measure the width, (the x value), and height, (the y value), of the "circle" on your screen. For best results, assuming you have a flat screen monitor, use a dial caliper, or a good ruler.

If x > y, then calculate your aspect ratio as y/x. Or, if the opposite, AR, the aspect ration, equals x/y. Use this information to create a decent circle using the SmithPlot Utility.