I have a Rigol DS1074Z and can't figure out how to lower the time the scope spends pre-sampling to open up more memory for the actual data I want to see.
Here is a nice image that will hopefully explain better:
And here is what it looks like when I am trying to store beginning of USB communication:
Unfortunately almost 50% of the 12 million data points are wasted. I would like to move the TriggerPoint in the first image closer to the beginning. In other words, I really only need to see what happens after the trigger triggers (any maybe a little bit before)
Is there a setting I missed? Can this be achieved?
Best Answer
Yes, what you want can absolutely be achieved.
Before you capture a waveform use the horizontal position adjustment knob to change the position of the orange cursor at the top of the screen.
This first image show a capture from my scope with the horizontal position set to the center of the screen. The second image shows the same signal (but a new capture) with the trigger set close to the left side of the screen. You can see that in the second image I've captured much more of the signal.
I'm not familiar with your scope, but I think I've marked the correct knob. Also, there may be a setting you can change that will set the default horizontal trigger point to the left side of the screen.