UnderstandingOscilloscope Functions
18 TDS1000/2000-Series Digital Oscilloscope User Manual
Time Base
The oscilloscope digitizeswaveforms by acquiring the valueof an
input signal at discrete points. The time base allows you to control
how often the values are digitized.
To adjustthe time base to a horizontal scale that suits your purpose,
use the SEC/DIV knob.
Scaling and Positioning Waveforms
You can change the display of waveforms by adjusting their scale
and position. When you change the scal e, the waveform display will
increase or decrease in size. When you change the position, 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 di splay. The indicator points to the
ground level of the waveform record.
To view the display area and readouts, refer to page 28.
Vertical Scale and Position
Youcan change the vertical position of waveforms by movingthem
up or down in the display. To compare data, you can align a
waveform above another or you can align wave forms on top of each
other.
Youcan change the vertical scale of a waveform. The waveform
display will contract or expand about the ground level.
For oscilloscope-specific descriptions,refer to page 34 in the
Operating Basicscha pter and page 112 in the Reference chapter.