1. Display Mode where the modes can be:
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Standalone for a standalone oscilloscope
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Multiscope for multiple ATI/TekConnect instruments
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Time Sync mode
2. Channel selection - channels are grayed out when the channel is off. Press the channel button to toggle the channel on or
off.
3. Histogram view - Mean, StdDev and Population are shown.
4. Slope and Level - define the slope and level to use for deskewing.
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Trigger uses the trigger slope and level as the reference polarity and level for the channel's alignment.
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Rise uses the rising edge nearest the trigger point and allows you to adjust the level.
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Fall uses the falling edge nearest the trigger point and allows you to adjust the level.
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Either uses either the rising or falling edge and level.
NOTE. When using the deskew tool to align a differential pair select the trigger slope for the first channel and an edge
with its polarity opposite of the trigger's polarity.
5. Deskew To Mean - adds the measured skew value for each selected channel to the channel deskew value for each
respective channel.
6. Set 0 - resets all channel deskew values to 0.
7. Histogram Reset - clears the histograms of their population data.
8. Set Default - sets the Slope to Trigger on all channels and resets the histograms.
The tool works by precisely computing the difference between the trigger location and each channel's selected edge. The
computed values are shown in the histogram view. To align the oscilloscope channels, select the slope and level, wait for a
sufficient population to be accumulated (wait for the indicator near the To Mean button to turn green), and then press the To
Mean button.
Typically on DPO70000SX oscilloscopes it takes two accumulations and To Mean button presses to get femtosecond (fs) level
alignment. This is because when deskew values are set to 0 in the oscilloscope, the skew values can be in the picosecond (ps)
range. The difference in resolution between ps and fs is large. So the first try gets you close and the second gets into the fs
range.
Acquisition
DPO70000SX Series User 51
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