Teneyes: This also looks like a Bug to me. Please, why would Trigger level effect the vertical display/measurement when switching from 'ROLL' to 'Y-T' Mode?
CORRECTION , Yes a rare bug
Thanks Ted, I removed any Trigger level causes by using External Trigger (5 V sync pulse)
Also set the input Scaling to 1x
Used a 2 cycle burst to set roll and trigger time
I find the bug of 1/2 scaling occurs for this Setup
1. Lowest V/Div scale (500uV/div @ 1X, 5mV/div @ 10X..... )
2. After Switching from Roll to Y-T
The scale is corrected after:
1 The scale is clicked lower (still the Same 500uV/div)
2 The vertical position is changed
3. The vertical position is Zeroed
4. The trigger position is Changed or Zeroed
5. Chan 2 ( even Off) position is Zeroed
I hope that would help Rigol narrow the code that needs to be called when switching to Y-T mode
The 3 Displays with 3.6mV,
Roll mode
Y-T mode
Y-T mode after a knob click
Edit: I have reported this to Rigol , anyone with D2000A , wish to confirm This bug
Edit: Occurs when Chan 1 only is on