Average. This mode acquires and displays a waveform record that is the average result of several acquisitions. This mode
reduces random noise. Use the multipurpose knobs to specify the number of waveforms that you want to average.
WfmDB. Waveform Database mode acquires and displays a waveform that is the accumulation of several acquisitions. In
addition to time and amplitude, the waveform displays a count of the number of times a specific sample point has been acquired.
The value at each point on the waveform is a counter that reflects the hit intensity. The instrument acquires data after each
trigger event using Sample mode. It then determines the location of each sample point and accumulates it with shared data from
previous acquisitions. This is the only mode that can be used when doing mask testing with an optical standard. Fast Acq is
inhibited in Waveform Database mode.
What do you want to do next?
Learn about Fast Acquisitions mode.
Learn about Roll mode.
Horizontal/Acquisition control window (Acquisition tab)
From the Horiz /Acq menu, select Horizontal/Acquisition Setup; then open the Acquisition tab.
Overview
Use the Acquisition tab to set the acquisition parameters for all live waveforms. The Acquisition controls are common to all
channels. This means that you cannot acquire in Sample mode on channel 1 while channel 2 acquires in Envelope mode.
For information on the controls, click on the buttons.
Acquisition mode on page 770
Fast Acquisitions
Roll Mode
Sampling Modes
FastFrame Control Windows
External Signals Control Window
Behavior
Acquisition is the process of sampling the analog input signal, digitizing the signal to convert it into digital data, and then
assembling the signal information into a waveform record. The instrument creates a digital representation of the input signal by
sampling the voltage level of the signal at regular time intervals. The sampled and digitized points are stored in memory along
with the corresponding timing information. The instrument uses the digital representation of the signal for display, measurements,
or for further processing.
Use the controls on this tab to define the sampling method, the acquisition mode, turn Fast Acquisitions on or off, and activate an
external reference.
What do you want to do next?
Acquisition mode on page 770
Oscilloscope reference
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 773
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