User Manual

Teledyne LeCroy

History Mode in WaveSurfer 3000 Oscilloscopes

page | 1 of 4

History Mode in WaveSurfer 3000

Oscilloscopes

TECHNICAL BRIEF

Introduction

Today’s oscilloscopes are extremely powerful tools with the ability to

unearth minutely fine signal details. In no case is this truer than with the

WaveSurfer 3000 oscilloscopes from Teledyne LeCroy. WaveSurfer 3000

comes with a number of debug and analysis tools such as History Mode,

which allows users to scroll back in time to isolate anomalies or other

waveform events, measure them with parameters or cursors, and quickly

find the sources of problems.

Often, when viewing waveforms on an oscilloscope display, unexpected

events may occur and there is no way for the user to stop the trigger and

view anomalies. History Mode changes this and shortens the amount of

time it takes to identify problems by automatically stopping the trigger and

displaying a list of previously captured waveforms. In this way,

unexpected anomalies can be viewed, quantified, and analyzed.

Invoking History Mode

For this demonstration, we fed a 2-MHz pulse into Channel 1 on the

oscilloscope. The initial oscilloscope setup is shown in Figure 1.

Figure 1: This is the initial setup with a 2-MHz pulse waveform

on Channel 1 of the WaveSurfer 3000 oscilloscope.

June 30, 2014

Summary

History Mode gives the

WaveSurfer 3000

oscilloscopes a powerful

debug tool, providing

waveform playback that takes

users back in time to

effectively isolate anomalies in

signals.

PAGE 1
History Mode in WaveSurfer 3000 Oscilloscopes TECHNICAL BRIEF June 30, 2014 Introduction Summary Today’s oscilloscopes are extremely powerful tools with the ability to unearth minutely fine signal details. In no case is this truer than with the WaveSurfer 3000 oscilloscopes from Teledyne LeCroy.
PAGE 2
History Mode is best accessed directly from the front panel (it also is available in the Timebase drop-down menu); pressing the History button stops the trigger and quickly displays a list of previously captured waveforms alongside the waveform grid. The History Mode dialog box is shown in Figure 2. Figure 2: Upon invoking the History Mode option by pressing the front-panel button, users are presented with the controls dialog at the bottom of the screen.
PAGE 3
The top row of controls regulates scrolling, with the two outer buttons initiating a fast scroll and the two inner buttons a slower scroll. On the bottom row, the outer buttons jump to the oldest and newest acquisitions, while the inner two step through one at a time. Tapping the Index box allows for direct numeric entry of the desired history item.
PAGE 4
Teledyne LeCroy History Mode in WaveSurfer 3000 Oscilloscopes page | 4 of 4