Hello, I'm using the 2204 osciloscope. I have a signal with bursts at ~37Khz and when I set to Auto, Repeat or Single .. the trigger is not very precise. Sometimes it trigers at another rising edge, not the first one. The picture below it is an example. The problem is that whan viewing in Auto mode the same burst of signals, it is not stable, it moves right or left because it is not triggerd every time in the first point.
So ... I understand that ... for 2204 the trigger example is a problem ! I don't think that this behavior of the osciloscope is a normal one ... No one wants that with a trigger option set ... it shows a hardly-triggering signal / a non stable image from a periodical burst of data.
Hi, no this is normal. This is all dependant on when the trigger is enabled, or to say it in a different way when the trigger command is sent. So where on the waveform this will happen is somewhat random.
Not sure of the source impedance of the waveform you want to view but if it is reasonably low, you may be able to take a parallel feed of the signal trhough a diode to rectify it and then to a parallel RC circuit say 100k // 470pF which would give a roughly square wave which goes to about half a volt just after your burst starts and trails off a few burst cycles after it finishes. It is not a perfect solution but if you trigger at the lowest possible level, it may give you a stable view of the waveform.