How to Use the Program

The program window (Fig. 1) contains:

• Yellow edit boxes.

• White text boxes.

• Up-down controls for step-wise changing of reflection coefficient phase and magnetron efficiency.

• Pull-down selection boxes.

• Buttons, including radio buttons.

• Three-page tabbed container at the bottom of the window.

Fig. 1.  The PowTrans window.

The yellow edit boxes, pull-down selection boxes, up-down controls and radio buttons are used for entering user input data. There are three groups of input data defining the system: Magnetron, Load Reflection, and Measurement Couplers.

The white text boxes display computed results. The final results are logically grouped in the pages of the tabbed container at the bottom.

Using the program is simple:

• In the tabbed container at the bottom, select the group of results you wish to observe (Transmission, Power Measurement, or Load Measurement).

• Enter one or more input values. You can do it as follows:

• Edit a yellow edit box.

• Click an up-down control.

• Click a radio button.

• Click the Evaluate button to compute results. In most cases, clicking this button is unnecessary because the computation takes place automatically after changing an input.

The source or load reflection coefficient magnitude can be entered

• as a linear value (values 0 to 1),

• in decibels (values £ 0),

• as a Voltage Standing Wave Ratio VSWR (values ³ 1).

To enter a reflection coefficient in a desired format in the Source Reflection or Load Reflection group:

• Select the desired format in a pull-down selection box on the right of the Magnitude.

• Type in the value into the associated edit box.

Note: Changing the format recalculates the current reflection coefficient value to the new format, so this procedure may also serve as a tool to convert linear reflection coefficient to decibels, VSWR, or vice versa.