Acquiring Waveforms
TDS5000 Series User Manual
3-17
H As you vary vertical offset, the middle voltage level moves relative to zero.
This moves the vertical acquisition window up and down on the waveform.
With input signals that are smaller than the window, it appears the waveform
moves in the window. Actually, a larger signal shows what really happens:
the offset moves the middle of the vertical acquisition window up and down
on the input signal. Figure 3 --4 shows how offset moves the acquisition
window to control the portion of the waveform amplitude the window
captures.
H Applying a negative offset set moves the vertical range down relative to the
DC level of the input signal. Likewise, applying a positive offset moves the
vertical range up. See Figure 3 --4.
Offset 0.0 V
(At waveform ground reference)
Offset +300 mV
(Near waveform top level)
Vertical Window = 200 mV (10 divs X 10 mV /div + (+/- 5 divs of position))
Acquisition window shifts
positive to capture overshoot
Acquisition window shifts
negative to capture preshoot
Offset --300 mV
(Waveform bottom level)
Figure 3- 4: Varying offset moves the vertical acquisition window on the waveform
To Next Page
Loading...
Need help?
General
