SIGLENT TECHNOLOGIES CO., LTD.

EasySDL Open Source Acknowledgment
Introduction
The EasySDL use some open source software packages. This document lists
the packages and the respective license information.

The disclaimer
The open source software is distributed WITHOUT ANY WARRANTY; withouteven the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PUR- POSE. The respective licenses may contain moredetails.

To get the source code
Some software packets in EasySDL are under a license that need us toprovide the source code. You can contact us to get them at no charge.
If you want them, please contact by email:support@siglent.com
SIGLENT TECHNOLOGIES CO., LTD.
https://siglentna.com/

Third-Party Software, Licenses and Copyrights
SoftwareVersionLicense

Qt Core5.6.2

LGPL 3.0

Qt Gui

5.6.2

LGPL 3.0

Qt OpenGL

5.6.2

LGPL 3.0

Qt PrintSupport

5.6.2

LGPL 3.0

SIGLENT TECHNOLOGIES CO., LTD.

SoftwareVersionLicense

Qt Svg

5.6.2

LGPL 3.0

Qt Widgets

5.6.2

LGPL 3.0

Qwt

6.1.3

Qwt License 1.0

GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc.
Everyone is permitted to copy and distribute verbatim copiesof this license document, but changing it is not allowed.

This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a modeof using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking anApplication with the Library. The particular version of the Librarywith which the Combined Work was made is also called the "LinkedVersion".
The "Minimal Corresponding Source" for a Combined Work means theCorresponding Source for the Combined Work, excluding any source codefor portions of the Combined Work that, considered in isolation, are based on
the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means theSIGLENT TECHNOLOGIES CO., LTD.

object code and/or source code for the Application, including any dataand utility programs needed for reproducing the Combined Work from theApplication, but excluding the System Libraries of the Combined Work.

1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, afacility refers to a function or data to be supplied by an Applicationthat uses the facility (other than as an argument passed when thefacility is invoked), then you may convey a copy of the modified
version:a) under this License, provided that you make a good faith effort toensure that, in the event an Application does not supply thefunction or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, orb) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material froma header file that is part of the Library. You may convey such object
code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates(ten or fewer lines in length), you do both of the following:a) Give prominent notice with each copy of the object code that theLibrary is used in it and that the Library and its use are covered by thisLicense.
b) Accompany the object code with a copy of the GNU GPL and thislicense document.
4. Combined Works.
You may convey a Combined Work under terms of your choice that, taken
together, effectively do not restrict modification of the portions of the Library
contained in the Combined Work and reverse engineering for debugging suchmodifications, if you also do each of the following:

SIGLENT TECHNOLOGIES CO., LTD.

a) Give prominent notice with each copy of the Combined Work that
the Library is used in it and that the Library and its use are covered by thisLicense.
b) Accompany the Combined Work with a copy of the GNU GPL and thislicense document.
c) For a Combined Work that displays copyright notices duringexecution, include the copyright notice for the Library among
these notices, as well as a reference directing the user to thecopies of the GNU GPL and this license document.
d) Do one of the following:0) Convey the Minimal Corresponding Source under the terms of thisLicense, and the Corresponding Application Code in a form suitable
for, and under terms that permit, the user to recombine or relink theApplication with a modified version of the Linked Version to produce
a modified Combined Work, in the manner specified by section 6 ofthe GNU GPL for conveying Corresponding Source.
1) Use a suitable shared library mechanism for linking with theLibrary. A suitable mechanism is one that (a) uses at run time acopy of the Library already present on the user's computer system,and (b) will operate properly with a modified version of the Librarythat is interface-compatible with the Linked Version.
e) Provide Installation Information, but only if you would otherwise be required
to provide such information under section 6 of the GNU GPL, and only to theextent that such information is necessary to install and execute a modified
version of the Combined Work produced by recombining or relinking theApplication with a modified version of the Linked Version. (If you use option
4d0, the Installation Information must accompany the Minimal Corresponding
Source and Corresponding Application Code. If you use option 4d1, you must
provide the Installation Information in the manner specified by section 6 of theGNU GPL for conveying Corresponding Source.)
5. Combined Libraries.
You may place library facilities that are a work based on the Library side byside in a single library together with other library facilities that are notApplications and are not covered by this License, and convey such a
combined library under terms of your choice, if you do both of the following:a) Accompany the combined library with a copy of the same work based

SIGLENT TECHNOLOGIES CO., LTD.

on the Library, uncombined with any other library facilities, conveyed
under the terms of this License.
b) Give prominent notice with the combined library that part of it is a work
based on the Library, and explaining where to find the accompanying
uncombined form of the same work.
6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions ofthe GNU Lesser General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to address
new problems or concerns.
Each version is given a distinguishing version number. If the Library as you
received it specifies that a certain numbered version of the GNU Lesser
General Public License "or any later version" applies to it, you have the optionof following the terms and conditions either of that published version or of any
later version published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser General
Public License, you may choose any version of the GNU Lesser General
Public License ever published by the Free Software Foundation.
If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shallapply, that proxy's public statement of acceptance of any version ispermanent authorization for you to choose that version for theLibrary.
Qwt License
Version 1.0, January 1, 2003
The Qwt library and included programs are provided under the termsof the GNU LESSER GENERAL PUBLIC LICENSE (LGPL) with the following
exceptions:
1. Widgets that are subclassed from Qwt widgets do not constitute a
derivative work.
2. Static linking of applications and widgets to the Qwt library does notconstitute a derivative work and does not require the author to provide
source code for the application or widget, use the shared Qwt libraries,or link their applications or widgets against a user-supplied version ofQwt.

SIGLENT TECHNOLOGIES CO., LTD.

If you link the application or widget to a modified version of Qwt, then thechanges to Qwt must be provided under the terms of the LGPL in
sections1, 2, and 4.
3. You do not have to provide a copy of the Qwt licensewith programs that are linked to the Qwt library, nor
do you have to identify the Qwt license in yourprogram or documentation as required by section 6of the LGPL.

However, programs must still identify their use of Qwt.
The following example statement can be included in user
documentation to satisfy this requirement:[program/widget] is based in part on the work of
the Qwt project (http://qwt.sf.net).