Also, other parameters have been added to the test station where it would be difficult to alter the program. It is decided that an upgrade of the system is vital to the continuous use and effectiveness of the test station. When the program is written in C language, it begins execution by initializing the instrumentation system and setting up the data structures. The main loop control is entered after initialization. The loop awaits keyboard input and passes control to the appropriate routines when activity is detected.
Control is accomplished through the function keys and numeric keypad.
The function keys initiate major test, allow the system to reset, and exists the program. The numeric keypad moves cursor to adjust the RF drive frequency, power tube anode program, and the cascode grid bias program. An example of the operating parameter display during power testing of the PA is shown in Figure 3. Window NT LabView is installed to handled the data acquisition and control. The Windows NT LabView is a revolutionary graphical programming environment based on G programming language for data acquisition and control, data analysis, and data presentation.