Xviewer (701992) / XviewerLITE (free software)

Depending on your security environment, installation and launch may not be successful.
Please confirm that the trial version of the software can be installed and launched correctly before purchasing.
(Please refer to the Operating System Requirements in the Specifications tab for details).

Yokogawa Xviewer oscilloscope app for Windows lets you transfer files between the DL(M) series instruments and a PC, and gives you remote control of the instruments using your PC. Xviewer enables online and offline waveform display, computation, and analysis of data captured using Yokogawa's WE7000 series of PC-based measurement instruments. The Xviewer free download version, XviewerLITE is also available.
Applicable DL(M) models include: DLM5000, DLM3000, DLM4000, DL350, DL850E, DL850EV, SL1000

Xviewer is an oscilloscope app for Windows designed to work with Yokogawa's DL series digital oscilloscopes and the DL850 series/SL1400 ScopeCorders. Xviewer allows you to display DL-acquired waveform (using the "Viewer" function), perform file transfers, and control DL series instruments remotely.
XviewerLITE is the Xviewer free download version.

Xviewer is a PC software application designed to work with Yokogawa DL series digital oscilloscopes and ScopeCorders. It allows you to display acquired waveform data, perform file transfer, and control DL series instruments remotely. In addition to simply displaying the waveform data, Xviewer features many of the same functions that the DL series instruments offer; zoom display, cursor measurements, calculations of waveform parameters, and perform complex waveform math. Using Xviewer binary waveform data can easily be converted to CSV, Excel or Floating Point Decimal fomat.

Additionally, Xviewer can also be used to display and analyze waveform files captured using Yokogawa's WE7000 or SL1000 high-speed data acquisition hardware.


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Main and Zoom Displays

Tm 701992 05 Xviewer's zoom function works in the same manner as that on the DL instruments; displaying the entire waveform and a zoomed subset of the waveform simultaneously. The waveform can be horizontally and vertically zoomed. Even large amounts of waveform data (More than 2GP with the DL850) can be viewed quickly. The zoom window can be automatically scrolled (with variable direction and speed).


Comments can be added as needed, in any position, on the waveform viewer window. All comments, plus the waveform(s) can be printed as displayed.

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History memory display

Using the DL series instrument's history memory, you can arrange and display thumbnails of multiple acquired waveforms. The selected waveforms are expanded and displayed in the Main screen; multiple waveforms can also be superimposed.

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Using cursors, you can display the measured values at the points where the cursors intersect the waveform. There are three types of cursors available: horizontal, vertical, and X-Y. If two cursors are displayed, the difference between the them can be calculated and displayed.

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Waveform computation (available only with Math Edition)

Up to 32 math waveforms based on the displayed waveform data can be calculated and displayed. In addition to simple addition, subtraction, multiplication, and division, user-defined equations can be created using a large number of functions including: trigonometry, differentiation/integration, pulse width computation, and six types of FFT calculations. FFT analysis using up to 2M data points can be performed, and a wide variety of functions are available for frequency domain calculations such as power spectrum and transfer functions (amplitude and phase). Digital filtering (low pass, high pass, band pass) calculations for noise rejection and other applications are also included.

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FFT Display

Frequency domain waveforms are displayed in a dedicated FFT viewer window.

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Automated waveform parameter measurements

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Parameters (characteristics) of the displayed waveforms can be automatically calculated and displayed. Up to twenty-six parameters can be selected. Calculation of the selected parameters is performed automatically and the measured results are displayed in a list (as shown on the left).
The results of these calculations can be saved in a CSV file.

Cycle Statistics and History Statistics functions, which are both available in DL series instruments, can also be available in Xviewer when the software version is 1.70 or later. A histogram of statistical result(s) can be displayed as well. The statistical result(s) can be saved in a .csv file.

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Data conversion

Waveform data files in binary format (useful for data transfer because of their smaller size) can be converted to ASCII, Excel or Floating Point Decimal format and then opened using a spreadsheet program. It also can be converted into MATLAB(*.MAT) format file, then it can be imported into MATLAB.

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MATLAB is a registered trademark of The MathWorks, Inc. in the United States.

Making a report

  • A report can be made using displayed waveforms, cursor values, parameter measurement results and any text data. Five(5) kinds of report files (samples) are provided by default. These samples can be edited freely, or you can arrange your-original report as well. 

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Remote Instrument Control

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Xviewer supports Ethernet, USB and GP-IB interfaces, allowing you to control DL series* instruments using the PC on which Xviewer is installed. A virtual image of the screen and front panel of the DL that Xviewer is connected to is displayed on the PC. You can perform operations remotely by using your PC's mouse to "click" keys on the virtual screen as if you were pressing the actual keys on the DL.

* except the DL1700

File Transfer

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You can perform file transfers between a DL series * instrument and the PC on which the software is installed, via Ethernet, USB or GP-IB. When you connect with the DL, Xviewer displays a list of files residing on the DL. You can select files from the list for download to the PC.
* except the DL1700

DL850 Advanced Utility (/JS option)

The following option functions are available. This option satisfies your needs for auxiliary functions that the DL850 series main unit alone cannot provide.

This option consists of the following tools.

Name Functions
DL850 File Transfer Tool Automatic transfer of data files to a PC during long-duration continuous hard disk recording on the DL850 series, without stopping recording
DL850 File Utility Processing data files recorded on the DL850 series (converting formats, dividing and merging)

  • If an abnormality occurs during a long duration continuous test, you can analyze the saved measured data without having to stop measurement!
  • Easily duplicate critical measured data on the main unit and a PC

DL850 File UtilityMajor functions (available with a data file recorded by DL850 series)

Function Contents
File merging Multi-number of DL850 series data files divided in time or channel order can be merged into a single file.
File dividing A large(long) recorded data file can be divided into multi-small files. It can be equally divided or any portion can be extracted and resaved. It helps you to handle the data file easily.
Converting formats Binary data file(s) recorded by DL850 series can be converted into a CSV or floating format which can be imported into MATLAB.

MATLAB is a registered trademark of The MathWorks, Inc. in the United States.

Xviewer vs XviewerLITE

Xviewer vs XviewerLITE

Overview of Specifications

Compatible instruments

DLM5000, DLM4000, DLM3000, DLM2000, DL9000, DL7400, DL6000/DLM6000, DL1700/DL1700E, DL1600, SB5000, DL350, DL850/DL850E, SL1000, DL750, SL1400, WE7000
Each series of above models

  • Waveform Viewer
  • Communication settings (GP-IB, USB, Ethernet)
  • Online File Transfer
  • Remote control of the DL series 
  • Data Conversion


  1. Online file transfer and Remote Instrument Control are not possible with the DL1700 and WE7000.
  2. The DLM2000 series firmware version 1.08 or later is required.
  3. Please use the latest version of the instrument’s firmware.

Specifications of Waveform Viewer

File types:
Waveform data files in Binary format (.wvf & .wdf file name extensions)
Waveform data files in ASCII format(.csv file name extension)
Max. Number
of displayed
90/Group, Up to 10 Groups can be set
Display format: Main, Zoom, History, X-Y
Number of
Max. 16
Cursors: Vertical, Horizontal and X-Y
Annotation: Comments can be added in the Main, Zoom and X-Y windows
of Waveform
Max. 28 items such as P-P, Amp, RMS and Freq.

Cycle Statistics and History Statistics are available when the software version is 1.70 or later.
A report can be made using displayed waveforms, parameter measurement results, etc

Waveform Computation (available only with the Math Edition)

Max. Number
of displayed waveforms(CHs):
32 waveforms (Math1 to Math32)
Computation Accuracy (resolution): Single floating point number
Operations: +, -, x, /, Phase Shift
*Click here for detail of these operations.
FFT Points: Max. 2M points
FFT Window: Rect, Hanning and Flat top
Digital Filter: Guass, Sharp, IIR
Max. Number of computed points: 12.5M per each Math channel(2.5M if there are 11 or more Math channels)
Waveform Data Conversion: File(s) with an .wvf or .wdf file name extension can be converted to ASCII (.csv), Excel (.xls) or Floating Point Decimal format(.fld).
DL750 series/DL850 series realtime recording files can be converted to Binary (.wvf), ASCII (.csv), Excel (.xls) or Floating Point Decimal(.fld) format.

PC System Requirements

PC: PC capable of running Windows 8, Windows 8.1, Windows 10
CPU and memory: Core 2 Duo(2GHz) or faster processor and at least
1GB of memory
Display: SVGA, or XGA monitor with at least 65536 colors
GP-IB board: National Instruments GP-IB board or PCMCIA card
(required when using GP-IB data transfer and remote control)


  • Due to the end of support for some Microsoft libraries, the installation and launch of the software may be restricted depending on the user's security environment settings.
    Before purchasing, please ensure that you install and launch the trial version of the software in your environment to confirm that you can use it correctly.
  • A dedicated USB driver is required when using the USB interface. The USB driver can be downloaded from the y-Link.
  • The operation of the PCMCIA-GPIB card is not guaranteed on Windows 8, Windows 8.1, Windows 10.

Model Numbers and Suffix Codes

Suffix Code
Xviewer Standard Edition (1 license)
Xviewer Math Edition (1 license)
DL850 Advanced Utility (1 license)
Version Added Function Applicable Models
1.92 or later
  • Minor bug fix in USB communication with DLM3000.
1.91 or later
  • Supported synchronous operation ”DLMsync” in DLM5000.
1.90 or later
  • Supported DLM5000.
All models

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