Related Issues

If the signal is not stable on the screen sometimes it is because its frequency is very low respect the Sampling Rate, so during one (very fast) scan the Scope cannot see and recognize one complete waveform. In this case just try to lower the Sampling Rate.

Roll Mode

Roll Mode works for low sampling rates and allow to see the signal taking shape in real-time on the screen in continous and unlimited refreshes from left to right. It is still possible to use rulers and take measures while the signal update in real-time.