16 MS6000-EU-EN V1.4 8/12
3.15 Waveform Scaling and Positioning
The display of waveforms on the screen can be changed by adjusting their scale and position. Once the
scale changes, the waveform display will increase or decrease in size. Once the position changes, the
waveform will move up, down, right, or left.
The channel reference indicator (located on the left of the graticule) identifies each waveform on the
screen. It points to the ground level of the waveform record.
Vertical Scale and Position: The vertical position of a waveform can be changed by moving it up or
down on the screen. To compare data, align one waveform over another.
Horizontal Scale and Position: Pretrigger Information
The HORIZONTAL POSITION control can be adjusted to view waveform data before the trigger, after
the trigger, or some of each. When the horizontal position of a waveform is changed, the time between
the trigger position and the screen center is being changed.
For example, to find the cause of a glitch in a test circuit, trigger on the glitch and make the pre-trigger
period long enough to capture data before the glitch. Then analyze the pre-trigger data and perhaps find
the cause. Change the horizontal scale of all the waveforms by clicking the TIME/DIV button; for
example, to see just one cycle of a waveform to measure the overshoot on its rising edge. The
oscilloscope shows the horizontal scale as time per division in the scale readout. Since all active
waveforms use the same time base, the oscilloscope only displays one value for all of the active
channels.
