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Sampling mode selection DPO7354C, DPO7254C, and DPO7104C with Option 2SR

10 ns/div RT RT ET

≤5 ns/div ET/IT ET/IT ET/IT

The type of equivalent-time sampling the instrument uses is called random equivalent-time sampling. Although it takes the

samples sequentially in time, it takes them randomly with respect to the trigger. Random sampling occurs because the instrument

sample clock runs asynchronously with respect to the input signal and the signal trigger. The instrument takes samples

independently of the trigger position and displays them based on the time difference between the sample and the trigger.

What do you want to do next?

Go to the Horizontal Setup control window.

Return to the Acquisition Setup control window.

Set the resolution

From the Horiz /Acq menu, select Resolution.

Overview

Use the Resolution control window to select the number of samples per division for all acquired waveforms.

To use

Click in the Record Length control box and use the multipurpose knob or keypad to change the setting.

Behavior

The Duration, Sample Rate, and Resolution controls are readouts only. Their settings are impacted by other controls.

■

Duration specifies the time across the 10-division screen.

■

Sample Rate specifies the number of samples per second that will be acquired for each waveform. The faster the sample

rate, the more accurately the instrument can represent fine details in a fast signal.

■

Resolution is similar to the acquisition interval. It can be thought of as the time between sample points. In most cases, the

acquisition interval is the same as the resolution.

■

Record Length specifies the total number of samples in the waveform acquisition. The maximum record length depends on

the amount of memory in the instrument. Because the instrument can only store a finite number of waveform data points,

there is a trade-off between the waveform details and the record length. You can acquire either a detailed picture of a

waveform for a shorter period of time or a less detailed picture for a longer period of time.

What do you want to do next?

Learn about the Horizontal Setup control window.

Learn about the Acquisition Setup control window.

Horizontal and acquisition setups

196 DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series

Tektronix DPO7054C Printable Help

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