Waveform Capture and Playback Made Easy
应用文章
A good way to test your designs under worst-case conditions is to capture a known good waveform on a scope, download it into an arbitrary waveform generator (arb) and then modify various signal parameters to emulate worst-case input conditions. Now there is an easy way to accomplish this task. When you use recently introduced Keysight Technologies, Inc. instruments, the only equipment required is a scope, a generator and a USB memory stick. In the past, you also needed a PC and special waveform editing software. In this application brief, we show an example of capturing and storing 10 bytes of known good RS232/UART transmit serial bus signals using a Keysight 3000 X-Series oscilloscope. We download the stored waveform data into a Keysight 33522A function/arbitrary waveform generator for replay. We show how you can easily modify the signal’s baud rate and amplitude and add random noise to the signal, so you can test your designs under worst-case input conditions. You can apply the techniques presented in this application brief to test for worst-case conditions using virtually any kind of analog or digital signals that may be present in your designs, not just serial bus signals.