Introduction
The SigIQPro 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; without even theimplied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. The respective
licenses may contain more details.

To get the source code
Some software packets in SigIQPro are under a license that need us to provide
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
SoftwareQt CoreQt Gui

Version

5.14.25.14.2

LicenseCopyright

LGPL 3.0

Copyright (C)2007 Free
SoftwareFoundation,Inc.

LGPL 3.0

Copyright (C)2007 Free
SoftwareFoundation,Inc.
Copyright (C)2007 Free
SoftwareFoundation,Inc.

Qt Svg5.14.2

LGPL 3.0

Qt Widgets

5.14.2

LGPL 3.0

Copyright (C)2007 Free

Software

pugixml

FFTW

zlib

Version

1.13

3.3.5

1.2.1

LicenseCopyright
SoftwareFoundation,Inc.

MIT License

Copyright (C)2006-2018
ArsenyKapoulkine

GNU GPLv2

Copyright (C)2003, 2007-14
Matteo Frigo
Copyright (C)2003, 2007-14
Massachusetts
Institute ofTechnology

zilb/libpng

Copyright (C)1995-2003
Jean-loup
Gailly and MarkAdler

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, arebased on the Application, and not on the Linked Version.

The "Corresponding Application Code" for a Combined Work means theobject 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 arecovered by this License.
b) Accompany the object code with a copy of the GNU GPL and this license
document.
4. Combined Works.
You may convey a Combined Work under terms of your choice that,taken together, effectively do not restrict modification of theportions of the Library contained in the Combined Work and reverse
engineering for debugging such modifications, if you also do each of
the following: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 arecovered by this License.
b) Accompany the Combined Work with a copy of the GNU GPL and this license
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 torecombine or relink the Application with a modified version ofthe Linked Version to produce a modified Combined Work, in themanner specified by section 6 of the 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 timea copy of the Library already present on the user's computersystem, and (b) will operate properly with a modified versionof the Library that 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 theGNU GPL, and only to the extent that such information isnecessary to install and execute a modified version of theCombined Work produced by recombining or relinking theApplication with a modified version of the Linked Version. (Ifyou 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 the GNU GPL
for conveying Corresponding Source.)
5. Combined Libraries.
You may place library facilities that are a work based on theLibrary side by side in a single library together with other libraryfacilities that are not Applications and are not covered by thisLicense, and convey such a combined library under terms of yourchoice, if you do both of the following:a) Accompany the combined library with a copy of the same work basedon 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 theaccompanying 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 versionsof the GNU Lesser General Public License from time to time. Such newversions 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 theLibrary as you received it specifies that a certain numbered versionof the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms andconditions 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.

pugixml
Copyright (C) 2006-2018 Arseny Kapoulkine
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the “Software”?, to deal in the Software without restriction,

including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”? WITHOUT WARRANTY
OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS ORCOPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGESOR OTHER LIABILITY, WHETHER IN AN ACTION OFCONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OFOR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE.

FFTW
Copyright (C) 2003, 2007-14 Matteo Frigo
Copyright (C) 2003, 2007-14 Massachusetts Institute of Technology
The following statement of license applies *only* to this header file,and *not* to the other files distributed with FFTW or derived therefrom:
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:1. Redistributions of source code must retain the above copyrightnotice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyrightnotice, this list of conditions and the following disclaimer in thedocumentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESSOR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIEDWARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSEARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIALDAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTEGOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESSINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDINGNEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THISSOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

zlib
Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must notclaim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would beappreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly
jloup@gzip.org

Mark Adler
madler@alumni.caltech.edu

The data format used by the zlib library is described by RFCs (Request forComments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).