Keysight N7562A User manual

USER GUIDE
N7562/4A Multiport
Electronic Calibration Module
N7562A - DC to 9 GHz
N7564A - DC to 20 GHz

2 Keysight N7562/4A Electronic Calibration Module User Guide
Notices
Copyright Notice
© Keysight Technologies 2022
No part of this manual may be reproduced in
any form or by any means (including electronic
storage and retrieval or translation into a for-
eign language) without prior agreement and
written consent from Keysight Technologies as
governed by United States and international
copyright laws.
Manual Part Number
N7560-90002
Edition
Edition 1, November 10, 2022
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
Technology Licenses
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accordance
with the terms of such license.
Declaration of Conformity
Declarations of Conformity for this product
and for other Keysight products may be down-
loaded from the Web. Go to
www.keysight.com/go/conformity. You can
then search by product number to find the lat-
est Declaration of Conformity.
U.S. Government Rights
The Software is “commercial computer soft-
ware,” as defined by Federal Acquisition Regu-
lation (“FAR”) 2.101. Pursuant to FAR 12.212
and 27.405-3 and Department of Defense FAR
Supplement (“DFARS”) 227.7202, the U.S.
government acquires commercial computer
software under the same terms by which the
software is customarily provided to the public.
Accordingly, Keysight provides the Software to
U.S. government customers under its standard
commercial license, which is embodied in its
End User License Agreement (EULA), a copy of
which can be found at www.keysight.com/
find/sweula. The license set forth in the EULA
represents the exclusive authority by which the
U.S. government may use, modify, distribute,
or disclose the Software. The EULA and the
license set forth therein, does not require or
permit, among other things, that Keysight: (1)
Furnish technical information related to com-
mercial computer software or commercial
computer software documentation that is not
customarily provided to the public; or (2)
Relinquish to, or otherwise provide, the gov-
ernment rights in excess of these rights cus-
tomarily provided to the public to use, modify,
reproduce, release, perform, display, or dis-
close commercial computer software or com-
mercial computer software documentation. No
additional government requirements beyond
those set forth in the EULA shall apply, except
to the extent that those terms, rights, or
licenses are explicitly required from all provid-
ers of commercial computer software pursuant
to the FAR and the DFARS and are set forth
specifically in writing elsewhere in the EULA.
Keysight shall be under no obligation to
update, revise or otherwise modify the Soft-
ware. With respect to any technical data as
defined by FAR 2.101, pursuant to FAR 12.211
and 27.404.2 and DFARS 227.7102, the U.S.
government acquires no greater than Limited
Rights as defined in FAR 27.401 or DFAR
227.7103-5 (c), as applicable in any technical
data.
Warranty
THE MATERIAL CONTAINED IN THIS DOCU-
MENT IS PROVIDED “AS IS,” AND IS SUBJECT
TO BEING CHANGED, WITHOUT NOTICE, IN
FUTURE EDITIONS. FURTHER, TO THE MAXI-
MUM EXTENT PERMITTED BY APPLICABLE
LAW, KEYSIGHT DISCLAIMS ALL WARRAN-
TIES, EITHER EXPRESS OR IMPLIED, WITH
REGARD TO THIS MANUAL AND ANY INFOR-
MATION CONTAINED HEREIN, INCLUDING
BUT NOT LIMITED TO THE IMPLIED WARRAN-
TIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS OR FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES
IN CONNECTION WITH THE FURNISHING,
USE, OR PERFORMANCE OF THIS DOCU-
MENT OR OF ANY INFORMATION CONTAINED
HEREIN. SHOULD KEYSIGHT AND THE USER
HAVE A SEPARATE WRITTEN AGREEMENT
WITH WARRANTY TERMS COVERING THE
MATERIAL IN THIS DOCUMENT THAT CON-
FLICT WITH THESE TERMS, THE WARRANTY
TERMS IN THE SEPARATE AGREEMENT
SHALL CONTROL.
Safety Information
CAUTION
A CAUTION notice denotes a hazard. It calls
attention to an operating procedure, practice,
or the like that, if not correctly performed or
adhered to, could result in damage to the
product or loss of important data. Do not pro-
ceed beyond a CAUTION notice until the indi-
cated conditions are fully understood and met.
WARNING
A WARNING notice denotes a hazard. It calls
attention to an operating procedure, practice,
or the like that, if not correctly performed or
adhered to, could result in personal injury or
death. Do not proceed beyond a WARNING
notice until the indicated conditions are fully
understood and met.

Keysight N7562/4A Electronic Calibration Module User Guide 3
Certification
Keysight Technologies certifies that this product met its published specifications at the time of
shipment from the factory. Keysight Technologies further certifies that its calibration
measurements are traceable to the United States National Institute of Standards and Technology
(NIST, formerly NBS), to the extend allowed by the Institute’s calibration facility, and to the
calibration facilities of the other International Standards Organization members.

4 Keysight N7562/4A Electronic Calibration Module User Guide
Safety Information
The N756xA ECal modules comply with the following standard (dates and editions are cited in the
Declaration of Conformity):
– IEC/EN 61010-1
Safety Considerations
The following general safety precautions must be observed during all phases of operation, service,
and repair of this instrument. Failure to comply with these precautions or with specific warnings
elsewhere in this manual violates safety standards of design, manufacture, and intended use of the
instrument. Keysight Technologies assumes no liability for the customer's failure to comply with
these requirements.
NOTE
This product has been designed and tested in accordance with accepted industry standards and
has been supplied in a safe condition. The documentation contains information and warnings
that must be followed by the user to ensure safe operation and to maintain the product in a safe
condition.
WARNING
Safety of any system incorporating the equipment is the responsibility of the assembler of
the system.
WARNING
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE OR WET ENVIRONMENTS
Do not operate the device around flammable gases or fumes, vapor, or wet environments.
WARNING
DO NOT OPERATE DAMAGED OR DEFECTIVE INSTRUMENTS
Instruments that appear damaged or defective should be made inoperative and secured
against unintended operation until they can be repaired by qualified service personnel.
WARNING
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Because of the danger of introducing additional hazards, do not install substitute parts or
perform any unauthorized modification to the instrument. Return the instrument to a
Keysight Technologies Sales and Service Office for service and repair to ensure that safety
features are maintained.
WARNING
USE THE USB CABLE PROVIDED
Use the device with the USB cable provided with the shipment.

Keysight N7562/4A Electronic Calibration Module User Guide 5
Safety Symbols
The following symbol on the instrument and in the documentation indicates precautions which
must be taken to maintain safe operation of the instrument.
WARNING
USE THE DEVICE AS SPECIFIED
If the device is used in a manner not specified by manufacturer, the device protection may
be impaired.
WARNING
Keysight N756xA ECal modules are designed for indoor use and in an area with low
condensation.
WARNING
No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent
electrical shock, do not remove covers.
CAUTION
The instrument is designed for use in Overvoltage Category I and Pollution Degree 2.
CAUTION
CLEAN WITH SLIGHTLY DAMPENED CLOTH
Clean the outside of the instrument with a soft, lint-free, slightly dampened cloth. Do not
use detergent, volatile liquids, or chemical solvents.
When you see this symbol on your instrument, you should refer to the instrument’s instruction manual for important
information.

6 Keysight N7562/4A Electronic Calibration Module User Guide
Regulatory Markings[1]
South Korean Class A EMC Declaration
Information to the user:
This instrument has been conformity assessed for use in business environments. In a residential
environment, this equipment may cause radio interference.
This EMC statement applies to the equipment only for use in business environment.
The CE mark is a registered trademark of the
European Community. The CE mark shows that
the product complies with all the relevant
European Legal Directives.
CAN ICES/NMB-001(A) indicates that this ISM
device complies with the Canadian ICES-001.
Cet appareil ISM est conforme a la norme
NMB-001 du Canada.
ISM GRP 1 Class A indicates that this is an
Industrial Scientific and Medical Group 1 Class
A product.
This symbol indicates the time period
during which no hazardous or toxic
substance elements are expected to leak
or deteriorate during normal use. Forty
years is the expected useful life of the
product.
The UKCA (UK Conformity Assessed) marking is a
UK product marking that is used for goods being
placed on the market in Great Britain (England,
Wales, and Scotland)
The RCM mark is a registered trademark
of the Australian Communications and
Media Authority.
The crossed out wheeled bin symbol indicates that separate collection for waste electric and electronic equipment
(WEEE) is required, as obligated by the EU DIRECTIVE and other National legislation.
Please refer to www.keysight.com/go/takeback to understand your Trade-in options with Keysight in addition to
product take back instructions.
This symbol is a South Korean Class A EMC Declaration.
This equipment is Class A suitable for professional use and is for use in electromagnetic environments outside of the
home.
[1] This section lists the different Regulatory Markings which MAY be present on your product.
CAN ICES/NMB-001(A)
ISM GRP 1-A
R-REM-Kst-
WN21789

Keysight N7562/4A Electronic Calibration Module User Guide 7
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on the following
Keysight websites:
–www.keysight.com/find/ecal
(product-specific information and support, software and documentation updates)
–www.keysight.com/find/assist
(worldwide contact information for repair and service)

8 Keysight N7562/4A Electronic Calibration Module User Guide
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Keysight N7562/4A Electronic Calibration Module User Guide 9
Table of Contents
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
South Korean Class A EMC Declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1 General Information
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
When to Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
N756xA Connection Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Assembling Multiple N756xA Modules for Multiport Configuration . . . . . . . . . . . . . . . 24
Compatible Network Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Service and Recertification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2 Preparing ECal for Use
Inspecting the ECal Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Operating and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3UsingECalSoftware
Using the ECal Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Software Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
How to start the SFP Launcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Using N756xA Series ECal Modules for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4 Operating ECal Module
Setting Up a Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Supported Calibration Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Validating a Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
ECal Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5 Use, Maintenance, and Care of the Devices
Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Inspect Female Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Cleaning Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

10 Keysight N7562/4A Electronic Calibration Module User Guide
Gaging Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Making Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Handling and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
ECal Kit Storage Box (Option 150) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6 Specifications and Characteristics
Specifications: Terminology and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Characteristic Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Typical Pin Depth Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Supplemental Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Measurement Uncertainty Calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
7ReplaceableParts
Description of This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Type-N (50 ohm) Modules and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
3.5 mm Modules and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Keysight N7562/4A Electronic Calibration Module User Guide 11
List of Figures
Figure 1-1 Model N7562A Type-N female . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 1-2 Model N756xA 3.5 mm female . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 1-3 N756xA Multiport Configuration Setup . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 1-4 N756xA Configuration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 1-5 Installation of mounting bracket assembly . . . . . . . . . . . . . . . . . . . . . 25
Figure 1-6 Vertical Thru Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 1-7 Installation of semi-rigid cable guard assembly . . . . . . . . . . . . . . . . . 26
Figure 1-8 Installation of Stand Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 1-9 Connection between three or more N756xA modules . . . . . . . . . . . . 27
Figure 1-10 Installation of bracket horizontal assembly . . . . . . . . . . . . . . . . . . . . . 28
Figure 1-11 Horizontal Thru Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 2-12 ECal Model and Serial Numbers on the Backside of the ECal Module 34
Figure 3-13 Connect to Instrument Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 3-14 Connect to Instrument Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 3-15 Save Instrument Connection Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 3-16 ECal Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 3-17 Calibration Wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 3-18 Electronic Calibration: Advanced Settings . . . . . . . . . . . . . . . . . . . . . 47
Figure 4-19 Non-Insertable ECal Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 4-20 ECal module Not Found Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 4-21 Error: Frequency Range Dialog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 5-22 ESD Protection Using Mat, Wrist Strap, and Grounded Power Cord . 58
Figure 5-23 Type-N Connector Pin Depth and Mating Surfaces . . . . . . . . . . . . . . 60
Figure 5-24 Typical Gage: 3.5 mm Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 5-25 Typical Gage: Type-N Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 5-26 Wrench Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 5-27 Using the Torque Wrench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 5-28 ECal Kit Fiberboard Storage Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 6-29 Pin Depth for 3.5 mm Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 6-30 Pin Depth for Type-N Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Figure 6-31 N7562A Modules - Type-N Female . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 6-32 N756xA Modules — 3.5 mm Female . . . . . . . . . . . . . . . . . . . . . . . . . . 88

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Keysight N7562/4A Electronic Calibration Module User Guide 13
List of Tables
Table 1-1 N756xA Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 1-2 N756xA Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 1-3 N756xAEP Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 1-4 N756xA Accessories Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 1-5 N756xA Compatible Network Analyzers . . . . . . . . . . . . . . . . . . . . . . . 29
Table 2-6 N756xAEP Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 2-7 N756xA Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 2-8 Input Power Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 4-9 N756xA Status LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 4-10 N756xA Status LED States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 5-11 ECal Module Torque Wrench Information . . . . . . . . . . . . . . . . . . . . . . 72
Table 5-12 N756xA Storage Box Part Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 6-13 Specifications and Characteristics Terminology . . . . . . . . . . . . . . . . . 78
Table 6-14 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 6-15 Electrical Performance for N7564A (3.5 mm female) . . . . . . . . . . . . . 80
Table 6-16 Electrical Performance for N7562A (Type-N 50Ωfemale and 3.5 mm
female) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 6-17 Characteristic Performance for N7564A (3.5 mm female) . . . . . . . . . 81
Table 6-18 Characteristic Performance for N7562A (Type-N 50Ωfemale and 3.5 mm
female) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 6-19 Type-N 50 ΩConnector Pin Depth Characteristics . . . . . . . . . . . . . . 85
Table 6-20 3.5 mm Connector Pin Depth Characteristics . . . . . . . . . . . . . . . . . . . 85
Table 6-21 N756xA Series Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . 86
Table 7-22 Type-N Modules and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Table 7-23 3.5 mm Modules and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

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Keysight N7562/4A Electronic Calibration Modules
User Guide
15
1 General Information
Overview 16
Models 18
Options 19
N756xA Connection Restrictions 23
Assembling Multiple N756xA Modules for Multiport Configuration 24
Compatible Network Analyzers 29
Service and Recertification 30

16 Keysight N7562/4A Electronic Calibration Modules User Guide
Overview
The purpose of this manual is to help you use your N756xA Electronic Calibration (ECal) module
confidently and effectively. ECal is a precision, single-connection calibration technique which uses
fully traceable and verifiable electronic standards. Each module has unique S-parameter data that
is stored in the module's memory. During calibration, ECal uses this data to calculate the error
terms for your network analyzer.
This manual provides instructions for operating and maintaining your ECal module. Also included
are mechanical specifications and replaceable parts available for each model.
The N756xA series provide multiport calibration solutions with operating frequencies starting as
low as DC and ending as high as 20 GHz. Each N756xA module comes with six ports and can be
extended up to 36 ports if used together with other N756xA modules in a multiport calibration
setup.
Prerequisite Knowledge
This manual assumes you are trained in proper connector care. Because an accurate calibration
depends on the integrity and cleanliness of the connector interface, a damaged connector will
invalidate the calibration achieved with that module. Refer to the “Connector Care” on page 37.
Clarifying the Terminology of a Connector Interface
In this manual, adapters, ECal modules, and gage masters are referred to by way of their interface
connector. For example:
– A female adapter has a female interface.
– A male adapter has a male interface.
A connector gage is referred to by way of the connector it measures. For example:
– A male connector gage has a female interface so it can measure male devices.
– A female connector gage has a male interface so it can measure female devices.
Accuracy of Electronic Calibration versus Mechanical Calibration
As the number of DUT test ports increases, the required number of calibration measurements also
increases. This boosts the probability of bad connections and bad calibrations when mechanical
calibration standards are used rather than ECal. Also, test port cable repeatability and stability
errors are amplified by the increased number of connections and disconnections. To perform an
SOLT 4-port calibration, a minimum of twelve 1-port standards and three 2-port (thru) standards
are measured, requiring a total of eighteen connections.
Ignoring connection related errors, the following table compares the accuracy of ECal versus
mechanical calibration in various calibration options.
N756xA ECal modules can be used for S-parameter measurement calibrations. The
residual measurement uncertainty makes them unsuitable for advanced applications, such
as load pull, noise figure, etcetera.

Keysight N7562/4A Electronic Calibration Modules User Guide 17
Mechanical Calibration Type ECal Thru Type Measurement ECal Mechanical
Calibration
1-Port, calibration constant (not data-based) SOL NA Reflection ++
1-Port, short, open, sliding load NA Reflection +
1-Port, data-based, expanded NA Reflection +
2-Port TRL All types Reflection
Transmission
++
++
≥2-Port, calibration constant SOL
Characterized Reflection
Transmission ++ ++
Internal unknown Reflection
Transmission ++
≥2-Port, calibration constant SOL, unknown thru
Characterized Reflection
Transmission ++ ++
Internal unknown Reflection
Transmission
++
==
≥2-Port, data-based, expanded Characterized Reflection
Transmission
+
++
Internal unknown Reflection
Transmission
+
+
≥2-Port, data-based, expanded, unknown thru Characterized Reflection
Transmission
+
++
Internal
unknown
Reflection
Transmission
+
+
++ better; + slightly better; = same

18 Keysight N7562/4A Electronic Calibration Modules User Guide
When to Calibrate
A network analyzer calibration remains valid as long as the changes in the systematic error are
insignificant. This means that changes to the uncorrected leakages (directivity and isolation),
mismatches (source match and load match), and frequency response of the system are small
(<10%) relative to accuracy specifications.
Change in the environment (especially temperature) between calibration and measurement is the
major cause in calibration accuracy degradation. The major effect is a change in the physical
length of external and internal cables. Other important causes are dirty and damaged test port
connectors and calibration standards. If the connectors become dirty or damaged, measurement
repeatability and accuracy is affected. Fortunately, it is relatively easy to evaluate the general
validity of the calibration. To test repeatability, remeasure one of the calibration standards. If you
can not obtain repeatable measurements from your calibration standards, maintenance needs to
be performed on the test port connectors, cables and calibration standards. Also, maintain at least
one sample of the device under test or some known device as your reference device. A verification
kit may be used for this purpose. After calibration, measure the reference device and note its
responses. Periodically remeasure the device and note any changes in its corrected response which
can be attributed to the test system. With experience you will be able to see changes in the
reference responses that indicate a need to perform the measurement calibration again.
Models
This section provides the model number, operating characteristics and options available with
Keysight N756xA ECal modules. You can order ECal modules by selecting the model number
followed by the desired options.
N756xA Modules (RF MultiPort)
Each N756xA ECal module comes with six calibration ports and is available with the connector
types and frequency ranges shown in Table 1-1.
The ECal modules from this series are configurable and can be extended up to 36 calibration ports
by connecting multiple N756xA ECal modules together.
Figure 1-1 Model N7562A Type-N female

Keysight N7562/4A Electronic Calibration Modules User Guide 19
Figure 1-2 Model N756xA 3.5 mm female
Options
N756xA/N756xAEP Options
– Option 060, configures the module with Type-N female connectors.
– Option 061, configures the module with 3.5 mm female connectors.
– Software Option is needed to enable the Activation software for N756xA. For detailed
information on how to enable it, refer to Software Option Enable.
For detailed N756xA/N756xAEP Option list, refer to Table 1-2, Table 1-3 and Table 1-4.
Table 1-1 N756xA Modules
Model
Number
Connector
Type
Operating
Frequency
N7562A
Type-N
DC to 9 GHz
3.5 mm
N7564A 3.5 mm DC to 20 GHz

20 Keysight N7562/4A Electronic Calibration Modules User Guide
Table 1-2 shows the option list for a single N756xA ECal module (6-port).
Table 1-2 N756xA Options
N756xA Options Description
060 (for N7562A
module only)
Multiport ECal module 6-port Type-N Female
Calibration certificate
China RoHS Addendum for Test Accessories-RF and Microwave
USB 3.1 Gen-1 cable, Type-A and Type-C dual screw locking, 2 meters
Quick Start Poster
061
Multiport ECal module 6-port 3.5 mm Female
Calibration certificate
China RoHS Addendum for Test Accessories-RF and Microwave
USB 3.1 Gen-1 cable, Type-A and Type-C dual screw locking, 2 meters
Quick Start Poster
Software Option -
S94554B (for N7562A)
and S94555B (for
N7564A)
Activation software (This is mandatory and a pre-installed software for N756xA)
1A7 Calibration + Uncertainties + Guardbanding
UK6 Adds commercial calibration certificate with measured data.
SPS Post Sales Support
151 Torque wrench, 8 in-lb (5/16 in)
152 Torque wrench, Type-N