Acquiring Waveforms
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CSA7000B Series & TDS7000B Series Instruments User Manual
Overview Control elements and resourcesTo set Roll Mode (Cont.)
To disable roll
mode
6. Touch the Horiz button. Select Acquisition tab from the
Horiz/Acq control window,
Or select Horizontal/Acquisition Setup from the
Horiz/Acq menu to display the Acquisition Mode control
window. Select the Acquisition tab.
7. Select Roll Mode OFF to disable roll mode.
Or, whenever you set the Horizontal SCALE to 40 ms
per division or faster, roll mode turns off. At record
lengths greater than 500 points, the time per division
required to turn off roll mode becomes slower.
Note. Envelope, Average, Fast Acquisition, and
Waveform Database acquisition modes inhibit roll mode.
Acquisition Control Background
This section contains background information on the data sampling and
acquisition process that can help you more effectively set up the acquisition
window of each channel. This section describes the following:
H The acquisition hardware
H The sampling process, sampling modes, and the waveform record
H Both the normal and Fast Acquisitions acquisition cycles
Before a signal can be acquired, it must pass through the input channel where it
is scaled and digitized. Each channel has a dedicated input amplifier and digitizer
as shown in Figure 3--8; each channel can produce a stream of digital data from
which waveform records can be extracted. See Signal Connection and Condi-
tioning on page 3--8 for further description of scaling, positioning, and DC
offsetting of channels.
Acquisition Hardware