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Foreword ... 1 Flow of Operation ... 3 Names and Functions of Front Panel Controls ... 4 Parts of the Screen ... 7 Basic Key and Jog Shuttle Operation ... 10 Introduction to Main Functions ... 12 Working with the DL7400 ... 17 • Preparing for an Observation ... 17 • Displaying a Waveform on the Screen ... 19 • Changing Waveform Display Conditions ... 20 • Changing Trigger Settings ... 23 • Measuring a Waveform ... 25 • Zooming a Waveform along the Time Axis ... 26 • Printing and Saving a Waveform ... 27

Structure of this Manual This User’s Manual consists of seven chapters, an Appendix and an Index as described below. Chapter 1 Overview of the GP-IB Interface (Option) Describes the functions and specifications of the GP-IB Interface. Chapter 2 Overview of the USB Interface Describes the functions and specifications of the USB Interface. Chapter 3 Overview of the Ethernet Interface (Option) Describes the functions and specifications of the Ethernet Interface. Chapter 4 Before Programming Describes formats used when sending a command. Chapter 5 Commands Describes each command. Chapter 6 Status Report Describes the status byte, various registers and queues. Chapter 7 Sample Programs Sample programs, written in Visual BASIC, for MS-DOS/V machines equipped with the following GP-IB board: AT-GPIB/TNT IEEE-488.2, from National Instruments. Appendix Contains references including the ASCII character code table. Index Provides an index ordered alphabetically.