Repetitive Mode allows taking acquisitions repeatedly without user interaction. This can be turned on or off by either clicking on the arrow next to the run button or selecting Repetitive under System->Repetitive. You can change the settings for Repetitive mode by going to System->"Repetitive Properties...". It may be appropriate to write a program to automate taking acquisitions. There are many programmatic options available such as TLAScript, TPI and TPI.NET. The simplest approach would be to use a TLAScript. A TLAScript is simply a script with Commands followed by any necessary parameters. TLAScript is found by going to Start->Programs->Tektronix Logic Analyzer->TLAScript. All the documentation for TLAScript can be found in the TLAScript Help Topics. Within TLAScript go to the Help menu and select Help Topics. Open Overview and choose "Starting the TLAScript Application" for examples of how to start TLAScript locally or remotely. Next see the help topic "Example of a TLAScript Application" for a good example showing how to take an acquisition and export a specified number of samples.