CellAdvisor JD720C Series
Cable and Antenna Analyzers
JD723C JD724C JD725C JD726C
User’s Manual
Network and Service Enablement
One Milestone Center Court
Germantown, Maryland 20876-7100 USA
Toll Free 1-855-ASK-JDSU • Tel +1-240-404-2999 • Fax +1-240-404-2195
www.jdsu.com
CellAdvisor JD720C Series
Cable and Antenna Analyzers
JD723C JD724C JD725C JD726C
User’s Manual
Notice
Every effort was made to ensure that the information in this manual was accurate at the time
of release. However, information is subject to change without notice, and JDS Uniphase
reserves the right to provide an addendum to this manual with information not available at the
time that this manual was created.
Copyright
© Copyright 2014 JDS Uniphase Corporation. All rights reserved. JDSU, Network and
Service Enablement, and its logo are trademarks of JDS Uniphase Corporation (“JDS
Uniphase”). All other trademarks and registered trademarks are the property of their
respective owners. No part of this document may be reproduced or transmitted electronically
or otherwise without written permission of the publisher.
Copyright release
Reproduction and distribution of this document is authorized for Government purposes only.
Trademarks
JDSU, CellAdvisor, and StrataSync are trademarks or registered trademarks of JDSU in the
United States and/or other countries.
Bluetooth is a trademark or a registered trademark of Bluetooth Special Interest Group (SIG)
Inc. in the United States and/or other countries.
Android is a trademark or a registered trademark of Google in the United States and/or other
countries.
iOS is a trademark or a registered trademark of Apple Inc. in the United States and/or other
countries.
Windows and Windows 7 are either trademarks or registered trademarks of Microsoft
Corporation in the United States and/or other countries.
Specifications, terms, and conditions are subject to change without notice. All trademarks
and registered trademarks are the property of their respective companies.
Acknowledgement
This product incorporates open source software entitled “zlib”. The zlib is the compression
library written by Jean-loup Gailly and Mark Adler, who granted permission to use this
software for any purpose, including commercial applications.
This product includes open source software developed by the Apache Software Foundation
(http://www.apache.org/).
CellAdvisor JD720C User's Manual 3
This product used free library for JPEG image compression written and distributed by
Independent JPEG Group or IJG (http://www.ijg.org/).
See “Appendix H – OSS licensing” on page 177 for more information.
Ordering information
This manual is a product of JDSU, issued as part of the JD720C Series analyzers. The
catalog number for a published manual is JD720C362 - printed. The catalog number for an
electronic manual on CD-ROM is JD72050561 - electronic.
Terms and conditions
Specifications, terms, and conditions are subject to change without notice. The provision of
hardware, services, and/or software is subject to JDSU’s standard terms and conditions,
available at www.jdsu.com/terms.
NRTL compliance
This product was tested according to UL 61010-1:2012 and CAN/CSA C22.2
No. 61010-1-12. Conformity with these requirements is based upon compliance with the
standard IEC 61010-1. A copy of the Declaration of Conformity is provided upon your
request.
Ce produit a été testé selon la norme UL 61010-1 : 2012 et CAN / CSA C22.2
No. 61010-1-12. La conformité à ces exigences est fondée sur la conformité à la norme CEI 61010-1. Une copie
de la déclaration de conformité est disponible sur demande.
EMC directive compliance
JD723C and JD724C
This product was tested and conforms to the EMC Directive, 2004/108/EC and its amending
directives for electromagnetic compatibility. Conformity with this directive is based upon
compliance with the harmonized European standard: EN61326-1. A copy of the Declaration
of Conformity is provided upon your request.
JD725C and JD726C
This product was tested and conforms to the EMC Directive, 2004/108/EC and its amending
directives for electromagnetic compatibility. Conformity with this directive is based upon
compliance with the harmonized European standards: EN61326-1 and EN61326-2-3. A copy
of the Declaration of Conformity is provided upon your request.
Low voltage directive compliance
JD725C and JD726C
This product was tested and conforms to the Low Voltage Directive, 2006/95/EC and its
amending directives. Conformity with this directive is based upon compliance with the
harmonized European standard EN61010-1. A copy of the Declaration of Conformity is
provided upon your request.
4 CellAdvisor JD720C User's Manual
WEEE and battery directive compliance
JDSU has established processes in compliance with the Waste Electrical and Electronic
Equipment (WEEE) Directive, 2002/96/EC, and the Battery Directive, 2006/66/EC.
This product, and the batteries used to power the product, should not be disposed of as
unsorted municipal waste and should be collected separately and disposed of according to
your national regulations. In the European Union, all equipment and batteries purchased
from JDSU after 2005-08-13 can be returned for disposal at the end of its useful life. JDSU
will ensure that all waste equipment and batteries returned are reused, recycled, or disposed
of in an environmentally friendly manner, and in compliance with all applicable national and
international waste legislation.
It is the responsibility of the equipment owner to return equipment and batteries to JDSU for
appropriate disposal. If the equipment or battery was imported by a reseller whose name or
logo is marked on the equipment or battery, then the owner should return the equipment or
battery directly to the reseller.
Instructions for returning waste equipment and batteries to JDSU can be found in the
Environmental section of JDSU’s web site at www.jdsu.com. If you have questions
concerning disposal of your equipment or batteries, contact JDSU’s WEEE Program
Management team at WEEE.EMEA@jdsu.com.
CellAdvisor JD720C Series User’s Manual 5
Table of Contents
Chapter 1 About This Guide ............................................................................................................................... 12
Purpose and scope ............................................................................................................................................................. 13
Assumptions........................................................................................................................................................................ 13
Safety and compliance information ..................................................................................................................................... 13
Safety consideration .................................................................................................................................................... 13
Conventions ........................................................................................................................................................................ 14
Technical assistance ........................................................................................................................................................... 16
Chapter 2 JD720C Series Overview ................................................................................................................... 17
About the JD720C series .................................................................................................................................................... 18
Features and capabilities .................................................................................................................................................... 18
Features ................................................................ ....................................................................................................... 18
Capabilities .................................................................................................................................................................. 19
Options ................................................................................................................................................................................ 19
Specifications ...................................................................................................................................................................... 19
AC power ..................................................................................................................................................................... 19
Physical specifications ................................................................................................................................................. 20
Chapter 3 Getting Started ................................................................................................................................... 21
Unpacking the JD720C series ............................................................................................................................................. 22
Exploring the JD720C series ................................................................ ................................ ............................................... 22
Front panel ................................................................................................................................................................... 22
Top panel ..................................................................................................................................................................... 25
Display screen ............................................................................................................................................................. 27
Installing battery pack ......................................................................................................................................................... 30
Starting up your JD720C series .......................................................................................................................................... 31
Changing date and time ...................................................................................................................................................... 31
Chapter 4 Performing Calibration ...................................................................................................................... 33
Understanding calibration ................................................................................................................................................... 34
Calibration tools ........................................................................................................................................................... 34
Calibration status indicators ......................................................................................................................................... 34
Performing 1-port calibration ............................................................................................................................................... 35
O-S-L calibration using mechanical Y-Cal kit ............................................................................................................... 35
O-S-L calibration using electronic EZ-Cal kit................................................................................................................ 37
Quick calibration .......................................................................................................................................................... 39
Performing 2-port calibration ............................................................................................................................................... 40
O-S-L-Thru calibration using mechanical Y-Cal kit ...................................................................................................... 40
6 CellAdvisor JD720C User's Manual
Table of Contents
O-S-L-Thru calibration using electronic EZ-Cal kit ....................................................................................................... 41
Chapter 5 Reflection Testing .............................................................................................................................. 42
Introducing reflection measurements .................................................................................................................................. 43
VSWR .......................................................................................................................................................................... 43
Return loss ................................................................................................................................................................... 43
Display screen ............................................................................................................................................................. 44
Preparing for a measurement ............................................................................................................................................. 45
Selecting measurement mode ..................................................................................................................................... 45
Setting parameters ....................................................................................................................................................... 45
Performing calibration .................................................................................................................................................. 48
Making a measurement ....................................................................................................................................................... 48
Measurement examples ................................................................ ............................................................................... 49
Analyzing measurement results .......................................................................................................................................... 51
Chapter 6 DTF Testing ........................................................................................................................................ 52
Introducing DTF measurements .......................................................................................................................................... 53
Display screen ............................................................................................................................................................. 53
Preparing for a measurement ............................................................................................................................................. 54
Selecting measurement mode ..................................................................................................................................... 54
Setting parameters ....................................................................................................................................................... 54
Defining cable .............................................................................................................................................................. 58
Performing calibration .................................................................................................................................................. 59
Making a measurement ....................................................................................................................................................... 59
Measurement examples ................................................................ ............................................................................... 60
Analyzing measurement results .......................................................................................................................................... 62
Chapter 7 1-Port Cable Loss Testing ................................................................................................................. 63
Introducing 1-port cable loss measurements ...................................................................................................................... 64
Display screen ............................................................................................................................................................. 64
Preparing for a measurement ............................................................................................................................................. 65
Selecting measurement mode ..................................................................................................................................... 65
Setting parameters ....................................................................................................................................................... 65
Performing calibration .................................................................................................................................................. 68
Making a measurement ....................................................................................................................................................... 68
Measurement examples ................................................................ ............................................................................... 69
Analyzing measurement results .......................................................................................................................................... 70
Chapter 8 1-Port Phase Testing ......................................................................................................................... 71
Introducing 1-port phase measurements ............................................................................................................................. 72
Display screen ............................................................................................................................................................. 72
Preparing for a measurement ............................................................................................................................................. 73
Selecting measurement mode ..................................................................................................................................... 73
Setting parameters ....................................................................................................................................................... 73
Performing calibration .................................................................................................................................................. 76
Making a measurement ....................................................................................................................................................... 76
Measurement examples ................................................................ ............................................................................... 77
Analyzing measurement results .......................................................................................................................................... 77
CellAdvisor JD720C Series User’s Manual 7
Table of Contents
Chapter 9 Smith Chart Testing ........................................................................................................................... 78
Introducing Smith chart measurements ............................................................................................................................... 79
Display screen ............................................................................................................................................................. 79
Preparing for a measurement ............................................................................................................................................. 80
Selecting measurement mode ..................................................................................................................................... 80
Setting parameters ....................................................................................................................................................... 80
Performing calibration .................................................................................................................................................. 82
Making a measurement ....................................................................................................................................................... 82
Measurement examples ................................................................ ............................................................................... 83
Analyzing measurement results .......................................................................................................................................... 84
Chapter 10 2-Port Transmission Testing ............................................................................................................. 85
Introducing 2-port transmission measurements .................................................................................................................. 86
Gain ............................................................................................................................................................................. 86
Insertion loss ................................................................................................................................................................ 86
Display screen ............................................................................................................................................................. 86
Preparing for a measurement ............................................................................................................................................. 87
Selecting measurement mode ..................................................................................................................................... 87
Setting parameters ....................................................................................................................................................... 88
Performing calibration .................................................................................................................................................. 91
Making a measurement ....................................................................................................................................................... 91
Measurement examples ................................................................ ............................................................................... 92
Analyzing measurement results .......................................................................................................................................... 92
Chapter 11 2-Port Phase Testing ......................................................................................................................... 93
Introducing 2-port phase measurements ............................................................................................................................. 94
Display screen ............................................................................................................................................................. 94
Preparing for a measurement ............................................................................................................................................. 95
Selecting measurement mode ..................................................................................................................................... 95
Setting parameters ....................................................................................................................................................... 95
Performing calibration .................................................................................................................................................. 98
Making a measurement ....................................................................................................................................................... 98
Measurement examples ................................................................ ............................................................................... 99
Analyzing measurement results .......................................................................................................................................... 99
Chapter 12 High Power CW Signal Generating ................................................................................................. 100
Introducing RF source ....................................................................................................................................................... 101
Display screen ........................................................................................................................................................... 101
Using RF source ............................................................................................................................................................... 101
Selecting measurement mode ................................................................................................................................... 101
Turing on RF source .................................................................................................................................................. 101
Chapter 13 RF Power Testing ............................................................................................................................. 103
Introducing RF power measurements ............................................................................................................................... 104
Display screen ........................................................................................................................................................... 104
Preparing for a measurement ........................................................................................................................................... 105
Selecting measurement mode ................................................................................................................................... 105
8 CellAdvisor JD720C User's Manual
Table of Contents
Connecting a power sensor ....................................................................................................................................... 105
Setting parameters ..................................................................................................................................................... 106
Setting display ............................................................................................................................................................ 107
Making a measurement ..................................................................................................................................................... 107
Measurement example .............................................................................................................................................. 108
Analyzing measurement results ........................................................................................................................................ 109
Holding a measurement ............................................................................................................................................. 109
Setting limits ............................................................................................................................................................... 109
Chapter 14 Optical Power Testing ..................................................................................................................... 110
Introducing optical power measurements .......................................................................................................................... 111
Display screen ........................................................................................................................................................... 111
Preparing for a measurement ........................................................................................................................................... 112
Selecting measurement mode ................................................................................................................................... 112
Connecting a power meter ......................................................................................................................................... 112
Setting parameters ..................................................................................................................................................... 113
Making a measurement ..................................................................................................................................................... 114
Measurement example .............................................................................................................................................. 115
Analyzing measurement results ........................................................................................................................................ 115
Holding a measurement ............................................................................................................................................. 115
Viewing a relative power ............................................................................................................................................ 116
Storing power readings .............................................................................................................................................. 116
Chapter 15 Fiber Testing ..................................................................................................................................... 117
Introducing fiber inspection ............................................................................................................................................... 118
Display screen ........................................................................................................................................................... 118
Preparing for fiber inspection ............................................................................................................................................ 119
Connecting a fiber microscope ................................................................................................................................... 119
Selecting measurement mode ................................................................................................................................... 119
Setting parameters ..................................................................................................................................................... 119
Performing fiber inspection ............................................................................................................................................... 120
Capturing fiber image ................................................................................................................................................. 120
Testing a fiber ............................................................................................................................................................ 121
Chapter 16 Analysis ............................................................................................................................................ 125
Using zoom zones ............................................................................................................................................................. 126
Setting sub-band frequency ....................................................................................................................................... 126
Example of zoom zones ................................................................ ................................ ............................................. 127
Changing sub-band frequency ................................................................................................................................... 127
Tips for zoom zones ................................................................................................................................................... 127
Using alternate sweep ....................................................................................................................................................... 128
Setting alternate sweep ............................................................................................................................................. 128
Example of alternate sweep ....................................................................................................................................... 129
Using markers ................................................................................................................................................................... 129
Setting a marker ......................................................................................................................................................... 130
Moving, hiding, and clearing a marker ....................................................................................................................... 131
Searching for peak or valley ................................................................................................ ................................ .............. 131
Finding a peak or valley ............................................................................................................................................. 131
CellAdvisor JD720C Series User’s Manual 9
Table of Contents
Performing more searches ......................................................................................................................................... 132
Finding a peak or valley in zoom zones ..................................................................................................................... 132
Displaying traces ............................................................................................................................................................... 132
Adding a trace ............................................................................................................................................................ 133
Performing trace math ............................................................................................................................................... 134
Loading a saved trace ................................................................................................................................................ 134
Setting test limits ............................................................................................................................................................... 134
Setting a limit line ....................................................................................................................................................... 135
Setting a limit window ................................................................................................................................................ 136
Holding a measurement .................................................................................................................................................... 137
Chapter 17 Operation .......................................................................................................................................... 138
Performing save ................................................................................................................................................................ 139
Using save/load key ................................................................................................................................................... 139
Using favorite key ...................................................................................................................................................... 140
Using quick save key ................................................................................................................................................. 141
Using save on event .................................................................................................................................................. 142
Performing load ................................................................................................................................................................. 143
Using save/load key ................................................................................................................................................... 143
Using favorite key ...................................................................................................................................................... 144
Managing files ................................................................................................................................................................... 145
Using on-screen keyboard ................................................................................................................................................ 146
Typing in and deleting letters ................................................................................................ ................................ ..... 146
Editing keywords ........................................................................................................................................................ 147
Adding keywords ........................................................................................................................................................ 149
Changing display layout .................................................................................................................................................... 151
Changing display layout ............................................................................................................................................. 151
Single layout .............................................................................................................................................................. 151
Horizontal layout ........................................................................................................................................................ 151
Vertical layout ............................................................................................................................................................ 152
Connecting GPS receiver .................................................................................................................................................. 152
Connecting GPS receiver........................................................................................................................................... 152
GPS connection status indicators .............................................................................................................................. 153
Chapter 18 System Setting and Maintaining ..................................................................................................... 154
Checking system information ............................................................................................................................................ 155
Setting preferences ........................................................................................................................................................... 155
Installing options ............................................................................................................................................................... 157
Configuring network .......................................................................................................................................................... 157
Upgrading firmware ........................................................................................................................................................... 158
Performing service diagnostic ........................................................................................................................................... 159
Running self-test ........................................................................................................................................................ 160
Viewing system log .................................................................................................................................................... 160
Reverting to factory setting ........................................................................................................................................ 161
Re-aligning touch screen ........................................................................................................................................... 161
Activating StrataSync ........................................................................................................................................................ 161
Setting up Internet connection ................................................................................................................................... 162
Establishing a connection to StrataSync .................................................................................................................... 163
10 CellAdvisor JD720C User's Manual
Table of Contents
StrataSync status indicators....................................................................................................................................... 164
Appendix ........................................................................................................................................................... 165
Appendix A – Product general information ........................................................................................................................ 166
Appendix B – Ordering information ................................ ................................................................................................... 168
Basic Model ............................................................................................................................................................... 168
Options with license ................................................................................................................................................... 168
Standard accessories ................................................................................................................................................ 168
Optional accessories .................................................................................................................................................. 169
Appendix C – Cable listing ................................................................................................................................................ 172
Appendix D – Band listing ................................................................................................................................................. 173
Appendix E – VSWR-Return loss conversion table ........................................................................................................... 175
Appendix F – Device driver installation ............................................................................................................................. 176
Appendix G – Bluetooth connection .................................................................................................................................. 177
Connecting Bluetooth through BlueSoleil program .................................................................................................... 177
Connecting Bluetooth directly from your computer .................................................................................................... 180
Setting up communication in JDSU application.......................................................................................................... 181
Connecting JD720C series from Android-based smartphone over Bluetooth ............................................................ 183
Turning Bluetooth mode on/off manually ................................................................................................................... 183
Appendix H – OSS licensing ............................................................................................................................................. 184
Appendix I – RoHS information ......................................................................................................................................... 185
JD723C and JD724C ................................................................................................................................................. 185
JD725C and JD726C ................................................................................................................................................. 186
CellAdvisor JD720C Series User’s Manual 11
Chapter 1 About This Guide
Topics discussed in this chapter include the following:
Purpose and scope .............................................................................................................. 13
Assumptions ......................................................................................................................... 13
Safety and compliance information ...................................................................................... 13
Conventions ......................................................................................................................... 14
1
Technical assistance ............................................................................................................ 16
Sections “Safety and compliance information” and “Conventions” in this chapter contain
information in French as well.
12 CellAdvisor JD720C User's Manual
Purpose and scope
WARNING
Do not attempt to service this product yourself, as opening or removing covers may
expose you to dangerous voltage and other hazards. Refer all servicing to qualified JDSU
service personnel.
The purpose of this manual is to help you successfully operate the JD720C series (firmware
version 1.050 and after) and use its features and capabilities. It includes instructions that
describe how to operate, set up, configure, and use the JD720C series cable and antenna
analyzers, consisting of JD723C, JD724C, JD725C, and JD726C.
Objectif et champ d'application
Le but de ce manuel est de vous aider à exploiter avec succès la série de JD720C (version du firmware 1.050 et
après) et utilisez ses fonctionnalités et capacités. Il comprend des instructions qui décrivent comment utiliser,
créer, configurer et utiliser le câble série de JD720C et analyseurs d'antenne, composée de JD723C et JD724C,
JD725C et JD726C.
Assumptions
This manual is intended for novice, intermediate, and experienced users who want to use the
JD720C series effectively and efficiently. We are assuming that you have basic operation
experience and are familiar with basic mobile communication concepts and terminology.
Chapter 1 About This Guide
Hypothèses
Ce manuel est destiné aux débutants, intermédiaires et aux utilisateurs expérimentés qui veulent utiliser la série
de JD720C efficace et efficiente. Nous supposons que vous avez une expérience de base de fonctionnement et
êtes familier avec les concepts de communication mobile de base et la terminologie.
Safety and compliance information
Safety and compliance information for the instrument are provided upon your request.
Informations de sécurité et de conformité
Informations sur la sécurité et la conformité de l'instrument sont fournies sur demande.
Safety consideration
It is mandatory to permanently connect this product to the protective earth.
When powering this instrument externally, always use an AC power cable that includes an
earth (safety) ground connection, which is shipped with your instrument.
Considération de la sécurité
Il est obligatoire de se connecter en permanence ce produit à la terre de protection. Lors de la mise de cet
appareil, utilisez toujours un câble d'alimentation qui comprend une terre (la sécurité) à la terre.
CellAdvisor JD720C Series User’s Manual 13
Chapter 1 About This Guide
AVERTISSEMENT
Ne pas tenter de réparer ce produit vous-même, car l'ouverture ou le retrait des capots peut vous
exposer à des tensions dangereuses et autres risques. Confiez toute réparation à un personnel
qualifié de service JDSU.
CAUTION
This equipment contains parts and assemblies sensitive to electrostatic discharge (ESD).
Use ESD precautionary procedures when touching, removing, or inserting ESD sensitive
parts and assemblies, or damage to components could result.
An electrostatic-sensitive device can only withstand voltage spikes of 10 to 100 volts. Any
discharge greater than this can damage or effectively destroy such a device while going
unnoticed by a technician. Common plastics (synthetic insulating materials), clothing, and
paper or cardboard are the most common source of static charges.
MISE EN GARDE
Cet équipement contient des pièces et des assemblages sensibles aux décharges électrostatiques
(ESD). Utilisez ESD procédures de précaution en cas de contact, la suppression ou l'insertion de
pièces de l'EDD et des assemblages sensibles, ou des dommages aux composants pourraient en
résulter.
Un dispositif électrostatique sensible ne peut supporter des pointes de tension de 10 à 100 volts. Tout
rejet supérieur à ce qui peut endommager ou détruire efficacement un tel dispositif alors passer
inaperçu par un technicien. Matières plastiques (matériaux synthétiques isolants), les vêtements et le
papier ou le carton sont la source la plus fréquente de charges statiques.
CAUTION
This instrument uses a Lithium Ion battery that, if not connected correctly, may lead to
explosion. In case the battery needs to be exchanged, it must be the same kind as or
compatible with the one shipped with your instrument.
The battery must not be disposed of in a landfill site or as municipal waste, and should be
disposed of according to your national regulations.
MISE EN GARDE
Cet instrument utilise une batterie lithium-ion qui, s'il n'est pas connecté correctement, peut conduire
à une explosion. Dans le cas où la batterie a besoin d'être remplacé, il doit être du même type ou
compatible avec celui fourni avec votre instrument.
La batterie ne doit pas être éliminé dans un site d'enfouissement ou les déchets municipaux, et doit
être éliminé conformément à la réglementation nationales.
Item
Text formatting/symbols used
Example(s)
Buttons or hard keys that
Bold, all caps, default font
Press the ON button.
Conventions
This document uses typographical and symbols conventions as described in the following
14 CellAdvisor JD720C User's Manual
tables.
Conventions
Ce guide utilise les conventions typographiques et les symboles tels que décrits dans les tableaux suivants.
Table 1 Text formatting and other typographical conventions
the user presses on a
physical device
Press the MODE hard key.
Press the MARKER hard key.
Screen keys, toggle keys, or
screen buttons that the user
taps on the touch-screen
Bold, default font
Tap the Limit Line screen key.
Tap the Marker Off screen key.
Screen key option
separators
Denoted by a vertical bar | that
means “or”, only one option can
be selected with a single press
Select On in the Zone [1|2|3] pane.
Tap the [Frequency|Distance] screen
key.
File type
Courier New
In .tra file type
Required arguments (text
variables in code)
Denoted by slanted brackets < >
Enter <password>
This symbol represents a general hazard. It may be associated with either a DANGER,
WARNING, or CAUTION message.
Ce symbole signale la présence d'un danger général.
This symbol represents hazardous voltages. It may be associated with either a
DANGER, WARNING, or CAUTION message.
Ce symbole signale la présence d'un risque d'électrocution.
This symbol represents a risk of explosion. It may be associated with either a DANGER,
WARNING, or CAUTION message.
Ce symbole signale la présence d'un risque d'explosion.
This symbol, located on the equipment, battery, or the packaging indicates that the
equipment or battery must not be disposed of in a landfill site or as municipal waste, and
should be disposed of according to your national regulations.
Ce symbole, qui apparaît sur l'équipement, la batterie ou leur emballage, indique que l'équipe-ment
en question ne doit pas être jeté dans une décharge ou dans les déchets ménagers, et doit être mis
au rebut conformément aux réglementations nationales en vigueur.
DANGER
Indicates a potentially hazardous situation that, if not avoided, will result in death or
serious injury. It may be associated with a general hazard, high voltage, or risk of
explosion symbol.
Indique une situation de danger imminent qui, si elle n'est pas évitée, peut entraîner la mort ou
des dommages corporels graves.
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in death
or serious injury. It may be associated with a general hazard, high voltage, or risk of
explosion symbol.
Indique une situation de danger potentiel qui, si elle n'est pas évitée, peut entraîner la mort ou
des dommages corporels graves.
Table 2 Symbol conventions
Chapter 1 About This Guide
Table 3 Safety definitions
CellAdvisor JD720C Series User’s Manual 15
Chapter 1 About This Guide
CAUTION
Indicates a potentially hazardous situation that, if not avoided, could result in minor
or moderate injury and/or damage to equipment. It may be associated with a
general hazard, high voltage, or risk of explosion symbol.
When applied to software actions, indicates a situation that, if not avoided, could
result in loss of data or a disruption of software operation.
Indique une situation de danger potentiel qui, si elle n'est pas évitée, peut entraîner des
dommages corporels légers ou modérés.
Region
Phone Number
E-mail Address
Americas
1-855-ASK-JDSU (option #3)
(1-855-275-5378, option #3)
catvsupport@jdsu.com
Europe, Africa, and Mid-East
+49 (0) 7121 86 1345
(JDSU Germany)
hotline.europe@jdsu.com
Asia and the Pacific
China 400 122 6542
Taiwan 008 06651950
India 1800 103 5378
Australia 1800 095 127
New Zealand 0800 448 482
Japan 005 316 50533
Korea 007 986 517 490
Singapore 1800 223 7070
Malaysia 1800 806584
Thailand 1800 658177
Vietnam 12065180
Philippines 1800 16510736
Indonesia 001 803657082
tac.apac@jdsu.com
Technical assistance
Contact information for technical assistance is listed in the following table. For the latest TAC
information, go to www.jdsu.com or contact your local sales office for assistance. Contact
information for regional sales headquarters is listed on the back cover of this manual.
Assistance technique
Les coordonnées de l'assistance technique est listé dans le tableau suivant. Pour les dernières informations de
TAC, allez à www.jdsu.com ou contactez votre bureau de vente local pour assistance. Coordonnées pour le siège
régional des ventes est cotée sur le dos de ce document.
Table 4 Technical assistance centers
During off-hours, you can request assistance by doing one of the following: leave a voice mail
message at the Technical Assistance number, e-mail the North American Technical
Assistance Center, tac@jdsu.com, or submit your question using our online Technical
Assistance Request form at www.jdsu.com.
16 CellAdvisor JD720C User's Manual
Chapter 2 JD720C Series Overview
This chapter provides a general description of the JD720C series. Topics discussed in this
chapter include the following:
About the JD720C series ..................................................................................................... 18
Features and capabilities ..................................................................................................... 18
Options ................................................................................................................................. 19
Specifications ....................................................................................................................... 19
2
CellAdvisor JD720C User's Manual
Chapter 2 JD720C Series Overview
Measurement Mode
JD723C
100 – 2700 MHz
JD724C
5 – 4000 MHz
JD725C
5 – 4000 MHz
JD726C
5 – 6000 MHz
Reflection – VSWR, Return Loss
DTF – VSWR, Return Loss
1 Port Cable Loss
1 Port Phase
Smith Chart
2 Port Transmission
Optional
2 Port Phase
Optional
RF Source (CW Signal Generator)
Optional
Optional
RF Power*
Optical Power*
Fiber Inspection*
About the JD720C series
The majority of problems in mobile networks occur at the base station infrastructure that is
consisted of the antenna system, cables, and connectors. It is essential to have the optimal
instrument for properly servicing or installing cell sites.
The JD720C series analyzers are the optimal test solution to characterize cell site’s
infrastructure due to its light-weight handheld design, ease of use, and rich functionality.
The JD720C series analyzers have all of the measurement functions necessary to accurately
verify the site’s transmission line and antenna system from signal reflections (VSWR or
Return Loss) to RF or optical transmission power. They also provide DTF (Distance to Fault)
measurement function to pinpoint a faulty location.
Table 5 Available measurements
Features and capabilities
Features
Up to 2001 data points to locate long distance problems
Dual display to view multiple measurements simultaneously to reduce test time
Backlight keypad for easier use in dark environments
Powerful application software for data management (JDViewer, StrataSync)
18 CellAdvisor JD720C User's Manual
*Does not require a license, but needs an optional accessory to be able to activate the function.
Chapter 2 JD720C Series Overview
Full remote control of the instrument through a software client JDRemote
Rechargeable and field replaceable Lithium Ion battery with more than 7 hours or 5 hours of
operation time depending on model
RF power protection of output
Capabilities
All JD720C series
Reflection measurement in VSWR, Return Loss, or Smith Chart
DTF (Distance to Fault) measurement in VSWR or Return Loss
1 Port Cable Loss measurement
1 Port Phase measurement
RF Power Meter with an external RF power sensor
Optical Power Meter with an external optical power meter
Fiber inspection with a fiber microscope P5000i
StrataSync supportability for cloud-based asset inventory and test data managements and
centralized configuration sharing
GPS supportability with an optional USB GPS receiver for a record of test position information
Bluetooth supportability with an optional USB Bluetooth adapter for FTP/OPP and PAN
connection with your computer or smartphone
Report generation in PDF and HTML file types directly from the instrument
JD725C and JD726C models
2 Port Transmission (gain/insertion loss) measurement
2 Port Phase measurement
Bias Tee
High power CW signal generator
Options
This instrument is provided with various options that are available to be ordered. See
“Appendix B – Ordering information” on page 168 for more information.
Specifications
AC power
Input voltage is automatically selected within the instrument’s tolerable input line voltage from
100 to 240 VAC. This instrument does not have a separate line protection fuse.
CellAdvisor JD720C Series User’s Manual 19
Chapter 2 JD720C Series Overview
Item
JD723C/724C
JD725C/726C
AC power
100 to 240 V AC, 50-60 Hz
100 to 240 V AC, 50-60 Hz
Power consumption
12 W in operation; 34.5 W with battery
charging
15 W in operation; 37.5 W with battery
charging
Parameter
JD723C/JD724C
JD725C/JD726C
Height
190 mm (7.5”)
190 mm (7.5”)
Width
260 mm (10.2”)
260 mm (10.2”)
Depth
60 mm (2.4”)
60 mm (2.4”)
Weight
< 2.35 kg (5.18 lb) with the battery pack
< 2.60 kg (5.73 lb) with the battery pack
Table 6 AC power requirements
Physical specifications
Table 7 shows weight with standard configurations and the battery pack installed.
Table 7 Physical specifications
20 CellAdvisor JD720C User's Manual
Chapter 3 Getting Started
This chapter describes how to get started with the JD720C series instrument. Topics
discussed in this chapter are as follows:
Unpacking the JD720C series ............................................................................................. 22
Exploring the JD720C series ............................................................................................... 22
Installing battery pack .......................................................................................................... 30
Starting up your JD720C series ........................................................................................... 31
3
Changing date and time ....................................................................................................... 31
CellAdvisor JD720C User's Manual
Chapter 3 Getting Started
Item
Quantity
JD720C series instrument (JD723C, JD724C, JD725C, or JD726C)
1
AC/DC power adapter
1
Cross LAN cable (1.5 m)
1
USB A to Mini B cable (1.8 m)
1
> 1 GB USB memory
1
Rechargeable Lithium Ion battery pack
1
Automotive cigarette lighter 12 V DC adapter
1
Stylus pen
1
User’s manual and application software CD
1
Soft carrying case
1
Unpacking the JD720C series
Unpack and inspect the shipping package thoroughly to ensure that nothing was damaged
during the shipment. Also, check that your delivered package includes all of your ordered
items in the shipment. If contents in the package are damaged or defective or if there are
missing items, keep the shipping list and materials for carrier’s inspection and contact your
nearest JDSU's authorized sales and service office.
A basic test set of JD720C series would include the following items in the package. For more
options, see “Appendix B – Ordering information” on page 168.
Table 8 Items included in a basic test set shipment
Exploring the JD720C series
Front panel
Figure 1 shows the front panel of the JD720C series analyzers.
22 CellAdvisor JD720C User's Manual
Figure 1 JD720C front panel view
JD724C
JD725C
No.
Description
Power button and LEDs
Operation hard keys – Mode, Setup, Favorite, Quick Save, Save/Load, and Cal
Analysis hard keys – Marker, Peak, Trace, Limit, Hold, and Auto Scale
Keypad – Numeric keys, ESC, Backspace, and Enter
Arrow keys
Rotary knob with enter function
LCD display screen – TFT touch-screen display
Speaker
Key
Description
Power On/Off: You can turn your instrument on or off. Two LEDs indicate power source and
status. See "Starting up your JD720C series" on page 31.
Chapter 3 Getting Started
Power on/off button
Measurement and operation keys
You can use these hard keys to activate specified functions as labeled on each key.
CellAdvisor JD720C Series User’s Manual 23
Chapter 3 Getting Started
Key
Description
Mode: You can bring up the measurement mode screen with all the measurement icons in three
different layout options.
Setup: You can bring up the measurement setup screen, where you can configure parameters
and settings such as frequency, amplitude, distance, cable definition, data points, interference
rejection, zoom, alternate sweep, etc.
Favorite: You can load stored favorites. Press and hold to save a frequently used measurement
setup up to 9 favorites.
Quick Save: You can quickly save captured trace(s) or current measurement display screen so
that you can load the data later.
Save/Load: You can bring up the Save/Load screen, where you can save and load a
measurement setup, trace, screen, limit setting, or report and manage files in the file manager.
Cal: You can perform a full O-S-L or quick calibration with on-screen instruction. If you have
connected an EZ-Cal kit, the instrument displays an instruction for e-calibration.
Key
Description
Marker: You can display a set of marker menu to control markers on the measurement screen.
Peak: You can display a set of peak search menu and to perform peak search or valley search
as needed.
Trace: You can display a set of trace menu to control traces. When you want to overlay a trace
by using the Load menu here, all the measurement setups such as measurement mode and
frequency band have to be the same as the ones of current measurement.
Limit: You can display a set of limit menu and to configure limit parameters as needed.
Hold: You can hold current measurement display. The red HOLD indication at the upper-left
corner of the screen indicates that the instrument holds current measurement and pauses
sweeping. You can press this key again to release holding and continue sweeping.
Auto Scale: You can let the instrument automatically set the Y scale to the minimum and
maximum values of a measurement on the Y-axis of the graph in a way to optimize display of the
traces. Every time the AUTO SCALE key is pressed, the top and bottom scales are set to the
minimum and maximum values with margin on the Y-axis of the screen display.
Key
Description
Arrow Keys: You can move selections upward and downward as needed.
Rotary Knob: You can turn this knob clockwise or counter clockwise to increase or
decrease selected value or to move selections such as a marker to the left or right. You
can also press this knob to complete input entry or confirm a selected menu.
Analysis keys
You can use these hard keys to activate specified functions as labeled on each key.
Arrow keys and rotary knob
24 CellAdvisor JD720C User's Manual
Chapter 3 Getting Started
Key
Description
Numeric Keys: You can manually enter a value for measurement parameter settings.
ESC: You can stop an active function, go back to the previous menu, or exit data entry
without changing value.
Backspace (): You can delete input entry one by one.
Enter: You can complete input entry. Pressing the rotary knob works as the same as
this key.
No.
Description
15 V DC port
RF Out and Reflection port
LAN port
Keypad
Screen keys
You can touch screen and use the screen keys displayed at the bottom of the screen. The
small slanted bracket symbol in the screen menu indicates that there are more menu choices
available in the lower layer of the screen menu.
Backlight
Illuminated key panel is ideal for dark environments. When the Backlight is set on in the
instrument settings, pressing or tapping any key turns on all the front panel key backlight for
several seconds.
Speaker
When the Sound is set on in the instrument settings, you can hear audible sound for alarms
and key strokes.
Top panel
Figure 2and Figure 3 show the top panel of JD724C and JD725C respectively.
Figure 2 JD724C top panel view
CellAdvisor JD720C Series User’s Manual 25
Chapter 3 Getting Started
USB host ports – USB memory, RF power sensor, optical power meter, fiber microscope, GPS
receiver, and Bluetooth adapter
USB client port – JDViewer and JDRemote
RS-232C serial port – RF power sensors
No.
Description
15 V DC port
RF Out 50 Ω and Reflection port
RF In 50 Ω port
LAN port
USB host ports – USB memory, RF power sensor, optical power meter, fiber microscope, GPS
receiver, and Bluetooth adapter
USB client port – JDViewer and JDRemote
RS-232C serial port – RF power sensors
CAUTION
Do not apply or connect power exceeding +25 dBm to this RF Out/Reflection port. If such
power is applied, it will degrade the product’s performance and can cause damage to the
product in worst case.
Figure 3 JD725C Top panel view
15 V DC port
This port is used to plug in the included AC/DC power adapter to run the instrument with
external power supplied from the wall unit. The orange LED illuminates when connecting the
external power.
RF Out / Reflection port
The RF Out / Reflection port is a precise 50 Ω N-type female connector that is used as the
output signal port for 1 port measurements. The maximum power level of the port is +25
dBm.
26 CellAdvisor JD720C User's Manual
Chapter 3 Getting Started
CAUTION
Do not apply or connect power exceeding +25 dBm to this RF In port. If such power is
applied, it will degrade the product’s performance and can cause damage to the product in
worst case.
RF In
The RF In port is a precise 50 Ω N-type female connector that is used as the input signal port
for 2 port transmission measurements with JD725C and JD726C. The maximum power level
of the port is +25 dBm. This port is not available in JD723C and JD724C.
LAN port
You can use this Ethernet communication port to connect your instrument and your PC using
the application software JDViewer or JDRemote, if needed. Two LEDs indicate data transfer
activity and link status.
ACTIVITY: The yellow LED is illuminated during data transfer.
LINK: The green LED is illuminated when there is a valid communication connection.
USB host ports
You can use these USB 2.0 ports to plug in an external USB memory to extend storage
capacity or to upgrade the instrument's firmware. It supports most USB memory devices with
32-bit file system. You can also use these ports to connect an external RF power sensor,
optical power meter, Bluetooth USB adapter, or fiber microscope P5000i. See “Appendix G –
Bluetooth connection" on page 177 for more information.
USB client port
You can use this communication port to connect your instrument and your PC with
application software JDViewer or JDRemote. You must install driver software for the
instrument on to the computer. See “Appendix F – Device driver installation" on page 176 for
more information.
Serial port
You can use the RS-232C serial port for power sensors such as JD72450551 and
JD72450552. The instrument does not recognize these power sensors automatically. You
can also connect your instrument and other application software via RS-232C connection.
Display screen
Figure 4 shows the display screen view of the JD720C series analyzers. The indicators and
icons in the status bar at the top of the screen give information about the instrument.
In dual display mode, the measurement display pane with outside borders indicates that it is
selected and active for operation and analysis. You can simply touch the other measurement
display pane on the screen to change the selection of active measurement.
CellAdvisor JD720C Series User’s Manual 27
Chapter 3 Getting Started
No.
Description
Model number
Shortcut – Date and time; GPS information if USB GPS receiver connected
Calibration status indicators – CAL ON, CAL ON (E), CAL ON (I), CAL ON (Q), CAL OFF (T),
CAL OFF
Shortcuts – Display layouts (single/dual horizontal/dual vertical), System, and Online Help
Port connection indicators, GPS lock status indicator, and Bluetooth connection status indicator
Power and battery status indicators
Measurement display pane
Trace and measurement setting information bar
Screen menu bar – Touch-screen interface allows fast and easy operation
Figure 4 JD720C display screen view
Model number
The instrument's model number is displayed: JD723C, JD724C, JD725C, or JD726C.
Date and time
The instrument's system clock setting that is set in the System menu is displayed. See
"Changing date and time" on page 31 for more information.
GPS information
If you have installed a license for your GPS connectivity option and connected a USB GPS
receiver, the instrument displays global positioning information of your test site.
28 CellAdvisor JD720C User's Manual
Chapter 3 Getting Started
Indicator
Description
Memory Drive: Indicates that a USB memory drive is connected successfully.
Power Sensor: Indicates that an external RF power sensor or Optical power
meter is connected successfully.
Fiber Microscope: Indicates that the fiber microscope P5000i is connected
successfully.
EZ-Cal: Indicates that the EZ-Cal kit is connected successfully and you can
perform an electronic calibration.
PC: Indicates that your PC is connected for JDViewer or JDRemote successfully.
StrataSync: Indicates the status of StrataSync connection.
GPS Lock: Indicates the status of GPS antenna connection
Bluetooth: Indicates the status of Bluetooth connection
Calibration status indicators
The calibration status indicators are important to get reliable measurement results. They
include CAL ON, CAL ON (E), CAL ON (I), CAL ON (Q), CAL OFF (T), and CAL OFF. See
“Understanding calibration” on page 34 for more information.
Shortcut icons
The shortcut icons for Single Layout, Horizontal Layout, Vertical Layout, System, and Online
Help provide an easy and quick access to each function with just one touch on the screen.
Figure 5 Online help screen
UBS, LAN and StrataSync connection indicators
CellAdvisor JD720C Series User’s Manual 29
Chapter 3 Getting Started
Indicator
Description
DC Supply: Indicates that external power is supplied to the instrument. The installed battery is
charged when the external power supply is connected.
Battery: Indicates that the instrument has a battery pack in it and shows the remaining battery
level or charging status in percentage.
Procedure
To install the battery pack:
1 Loosen the latching screw of the battery cover by
turning counter clockwise.
2 Slide out the battery cover to open.
3 Insert the battery pack with the connector
terminal side faced rear and push in until it stops.
4 Slide in the battery cover back to close.
5 Tighten the latching screw of the battery cover by
turning clockwise.
To remove the battery pack:
1 Loosen the latching screw of the battery cover by turning counter clockwise.
2 Slide out the battery cover.
3 Hold the battery strap and pull it out.
Power and battery indicators
Measurement display pane
There are three display layouts available: single, dual horizontal and dual vertical. For the
dual layout modes, the screen displays two measurement panes horizontally or vertically.
Trace and measurement setting information bar
This bar shows information about traces and measurement settings for the displayed
measurement.
Screen menu bar
The screen menu bar displays a set of screen keys at the bottom of the screen when you
press the MARKER, PEAK, TRACE, or LIMIT hard key. You can tap a screen key to execute
its function as needed.
Installing battery pack
You need to install the Lithium Ion battery pack provided with your instrument.
30 CellAdvisor JD720C User's Manual
CAUTION
The battery pack that came with your instrument is Lithium Ion and it may, if not connected
correctly, lead to explosion. In case you need to replace the battery, you must use one of
the same kinds or compatible ones. You must dispose a battery according to your local
safety and environmental regulations.
NOTE
It is recommended that you turn off the instrument to replace the battery. However, if you
do not want to interrupt the current test, you can leave the module turned on with the AC
power adapter plugged in.
Procedure
To turn on:
1 Press and hold the POWER button for a few seconds until the right green LED indicator is
illuminated.
2 Release the button and wait for a few seconds while booting up.
To turn off:
1 Press and hold the POWER button for a few seconds until the right green LED indicator
goes out.
2 Release the button.
Procedure
1 Press the MODE hard key and then tap the System button. You can also directly touch the date
and time information displayed at the top of the screen.
The System window appears.
2 Touch the Instrument Settings tab.
The Instrument Settings window appears.
3 Tap the bar for the Date/Time.
The Date and Time pane appears.
4 Tap the drop-down list button for the Standard Time Zone and then select your time zone.
5 Select the Date Format option from the choices: YYMMDD, MMDDYY, and DDMMYY.
6 To set the date and time manually, complete the following steps:
Starting up your JD720C series
Use the power button to turn your instrument on or off. When the external power is supplied
via the AC/DC adapter, the left orange LED is illuminated.
Chapter 3 Getting Started
Changing date and time
The instrument provides real time clock powered up by a separate internal battery to
maintain the timing information even when the Lithium-Ion battery is fully discharged or the
system power is disconnected. The system clock is preset for the time zone of South Korea
in the format of YYMMDD.
CellAdvisor JD720C Series User’s Manual 31
Chapter 3 Getting Started
a Select the Date input box for year, month, or day.
b Enter a number by using the numeric keys or the rotary knob.
c Select the Time input box for hour, minute, or second.
d Enter a number by using the numeric keys or the rotary knob.
e Tap the Apply button in the Date and Time pane to save the change(s).
7 Tap the Apply or Exit button in the lower-right corner of the Instrument Settings window to return
to the measurement screen.
32 CellAdvisor JD720C User's Manual
Chapter 4 Performing Calibration
This chapter provides instructions on how to perform calibration properly in order to obtain
accurate measurement results. Topics discussed in this chapter are as follows:
Understanding calibration .................................................................................................... 34
Performing 1-port calibration ................................................................................................ 35
Performing 2-port calibration ................................................................................................ 40
4
CellAdvisor JD720C User's Manual
Chapter 4 Performing Calibration
Indicator
Description
CAL ON
Indicates that a mechanical O-S-L calibration is performed using a Y-Cal kit and the
instrument is ready to make a measurement.
CAL ON (E)
Indicates that an electronic O-S-L calibration or e-calibration is performed using JDSU’s
EZ-Cal kit and the instrument is ready to make a measurement.
CAL ON (I)
Indicates that the frequency setting is changed within the frequency range registered for
the O-S-L calibration and so the calibration is still valid. When the calibration status
changes from CAL ON to CAL ON (I), re-calibration is not necessarily required.
CAL ON (Q)
Indicates that quick calibration (Quick Cal) is performed. It is useful only if cable length
measurement is needed.
CAL OFF (T)
Indicates that the temperature registered during the calibration is changed by ±10°C or
greater for center frequency higher than 3 GHz, ±15°C or greater for center frequency
between 2 GHz and 3 GHz, and ±20°C or greater for center frequency lower than
2 GHz. It is recommended that you perform a new O-S-L calibration to obtain accurate
measurement results. When the temperature comes back within the registered range,
the status may be changed to CAL ON.
CAL OFF
Indicates that the frequency setting is changed off the frequency range registered for the
calibration. The calibration is no longer valid.
Understanding calibration
Calibration of your instrument to the Open, Short, and Load standards is important to get
reliable and accurate measurement results. After setting frequencies and right before making
a measurement, you need to perform an O-S-L calibration using a mechanical or electronic
calibration kit.
Calibration tools
You need to have the following calibration tools to be able to perform a calibration. This
instrument detects the connected calibration kit and displays a different on-screen instruction
for it.
Mechanical Y-Cal kit or electronic EZ-Cal kit
Extension cable(s) if necessary
Calibration status indicators
This instrument displays calibration status that is an important indicator for you to verify if
your measurement results are reliable and accurate. The calibration status includes CAL ON,
CAL ON (E), CAL ON (I), CAL ON (Q), CAL OFF (T), and CAL OFF. When it changes to CAL
OFF (T) or CAL OFF, you will see the status displayed on the screen for a few seconds and
hear beeping sound as well.
34 CellAdvisor JD720C User's Manual
NOTE
If the O-S-L calibration is done at the end of the port extension cable for DTF
measurement, the length of the port extension cable is compensated automatically and is
not included in the distance to the point of discontinuity.
Do not use an unnecessary extension cable or adapter in order to prevent a measurement
error. Bending or moving the extension cable while making a measurement may cause
errors in the measurement.
JD723C/724C
JD725C/726C
Procedure
1 Connect an extension cable, if necessary, to the RF Out / Reflection port of the instrument.
2 Connect the OPEN standard of the calibration kit to the instrument's the RF Out / Reflection port
or to the extension cable if used.
3 Press the CAL hard key.
The on-screen instruction appears to guide you through the mechanical O-S-L calibration.
4 Do the following depending on your instrument model and its installed option:
Performing 1-port calibration
Measurement modes that need the 1-port calibration are Reflection, DTF, 1 Port Cable Loss,
1 Port Phase, and Smith Chart.
It is recommended that you perform an O-S-L calibration right at the RF Out / Reflection port
of the instrument without using an extension cable in order to minimize a measurement error.
If using an extension cable is inevitable, you need to use a phase stable cable and perform
the O-S-L calibration at the end of the extension cable.
O-S-L calibration using mechanical Y-Cal kit
Chapter 4 Performing Calibration
The O-S-L calibration must be performed after setting frequencies and connecting an
extension cable. Figure 6 illustrates a connection setup with using the port extension cable.
Figure 6 Mechanical calibration connection diagram with an extension cable
CellAdvisor JD720C Series User’s Manual 35
Chapter 4 Performing Calibration
– JD723C, JD724C, and JD726C without 2-por transmission option: Tap the Continue button.
The calibration progress bar appears.
– JD725C and JD726C with 2-port transmission option: Tap the O-S-L button.
The calibration progress bar appears.
5 Disconnect the calibration kit and then connect the SHORT standard of the calibration kit to the
instrument's the RF Out / Reflection port or to the extension cable if used.
6 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
7 Disconnect the calibration kit and then connect the LOAD (50 Ω) standard of the calibration kit to
the instrument's the RF Out / Reflection port or to the extension cable if used.
8 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
9 Check the screen to see if the calibration status is now changed to CAL ON.
Figure 7 O-S-L calibration on JD724C using Y-Cal kit
36 CellAdvisor JD720C User's Manual
Figure 8 O-S-L calibration on JD725C using Y-Cal kit
Chapter 4 Performing Calibration
O-S-L calibration using electronic EZ-Cal kit
The e-Calibration is an Open-Short-Load calibration using the electronic EZ-Cal kit, which
allows you to perform the O-S-L calibration easy and fast with only one connection of the kit
to the instrument.
The O-S-L calibration must be performed after setting the frequencies and connecting an
extension cable. Figure 9 illustrates a connection setup with using the port extension cable.
CellAdvisor JD720C Series User’s Manual 37
Chapter 4 Performing Calibration
JD723C/724C
JD725C/726C
Procedure
1 Connect an extension cable, if necessary, to the RF Out / Reflection port of the instrument.
2 Connect the EZ-Cal to the instrument's the RF Out / Reflection port or at the end of the extension
cable if used.
3 Connect the USB cable to the side of the EZ-Cal and then to the USB Host port to power the
e-calibration kit.
4 Press the CAL hard key.
The on-screen instruction appears to guide you through the e-calibration.
5 Do the following depending on your instrument model and its installed option:
– JD723C, JD724C, and JD726C without 2-port transmission option: Tap the Continue button.
The calibration progress bar appears.
– JD725C and JD726C with 2-port transmission option: Tap the O-S-L button.
The calibration progress bar appears.
6 Check the screen to see if the calibration status is now changed to CAL ON (E).
Figure 9 e-Calibration connection diagram with an extension cable
Figure 10 e-Calibration on JD724C using EZ-Cal kit
38 CellAdvisor JD720C User's Manual
Chapter 4 Performing Calibration
Procedure
1 Connect an extension cable to the RF Out / Reflection port of the instrument.
2 Press the CAL hard key.
The on-screen instruction appears. It contains the Quick Cal button.
3 Connect the OPEN standard of the calibration kit to the instrument's the RF Out / Reflection port
or to the extension cable if used.
4 Tap the Quick Cal button in the lower-left corner of the screen.
The calibration progress bar appears.
5 Check the screen to see if the calibration status is now changed to CAL ON (Q).
NOTE
CAL ON (Q) is valid only for a DTF measurement in the single layout. If you change the
display mode to others, calibration status goes back to the previous one.
Figure 11 Electronic calibration on JD725C using EZ-Cal kit
Quick calibration
The Quick calibration that is available only in the DTF measurement mode is useful when you
want to measure the cable length only, without having to perform a full calibration.
The Quick Cal must be performed after setting the frequencies and connecting an extension
cable. Figure 6 on page 35 illustrates a connection setup with using the port extension cable.
Figure 12 Quick calibration on JD724C
CellAdvisor JD720C Series User’s Manual 39
Chapter 4 Performing Calibration
Procedure
1 Connect an extension cable to the RF Out / Reflection port of the instrument.
2 Connect the OPEN standard of the calibration kit to the end of the extension cable connected to
the instrument's the RF Out / Reflection port.
3 Press the CAL hard key.
The on-screen instruction appears to guide you through the O-S-L-Thru calibration.
4 Tap the O-S-L-Thru button in the lower-left corner of the screen.
The calibration progress bar appears.
5 Disconnect the calibration kit and then connect the SHORT standard of the calibration kit to the
end of the extension cable connected to the instrument's the RF Out / Reflection port.
6 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
7 Disconnect the calibration kit and then connect the LOAD (50 Ω) standard of the calibration kit to
the end of the extension cable connected to the instrument's the RF Out / Reflection port.
8 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
9 Disconnect the calibration kit and then connect the end of the extension cable connected to the
instrument's the RF Out / Reflection port to the instrument’s RF In port as illustrated in
Figure 13.
10 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
11 Check the screen to see if the calibration status is now changed to CAL ON.
Performing 2-port calibration
Measurement modes that need the 2-port calibration are 2 Port Transmission and 2 Port
Phase with JD725C and JD726C. You must perform the mechanical or electronic O-S-L
calibration and then the Thru calibration after setting the frequency and the output power.
Figure 13 illustrates a connection setup for Thru calibration.
Figure 13 Thru calibration connection diagram
O-S-L-Thru calibration using mechanical Y-Cal kit
40 CellAdvisor JD720C User's Manual
Procedure
1 Connect an extension cable, to the RF Out / Reflection port of the instrument.
2 Connect the EZ-Cal to the end of the extension cable connected to the instrument's the RF Out /
Reflection port.
3 Connect the USB cable to the side of the EZ-Cal and then to the USB Host port to power the
e-calibration kit.
4 Press the CAL hard key.
The on-screen instruction appears to guide you through the e-calibration.
5 Tap the O-S-L-Thru button in the lower-left corner of the screen.
The calibration progress bar appears.
6 Disconnect the EZ-Cal kit and then connect the end of the extension cable connected to the
instrument’s RF Out / Reflection port to the instrument’s RF In port as illustrated in
Figure 13.
7 Tap the Continue button in the lower-left corner of the screen.
The calibration progress bar appears.
8 Check the screen to see if the calibration status is now changed to CAL ON (E).
O-S-L-Thru calibration using electronic EZ-Cal kit
Chapter 4 Performing Calibration
CellAdvisor JD720C Series User’s Manual 41
Chapter 5 Reflection Testing
This chapter provides instructions on how to perform Reflection measurements in VSWR or
Return Loss. Topics discussed in this chapter are as follows:
Introducing reflection measurements ................................................................................... 43
Preparing for a measurement .............................................................................................. 45
Making a measurement ....................................................................................................... 48
Analyzing measurement results ........................................................................................... 51
5
CellAdvisor JD720C User's Manual
Introducing reflection measurements
Reflection measurements in VSWR or Return Loss are used to characterize cable and
antenna system in order to ensure a cell site's impedance matching and signal reflection
characteristics.
A proper RF emission in cell sites is achieved with a maximum power transfer from the
transmitter to the antenna, where all the transmission media should have an impedance
match. A mismatch at the antenna system produces a reflective 'traveling wave’ that goes in
the opposite direction from the incident wave. As the two traveling waves cross each other in
opposite direction, it is produce an interference pattern called a "standing wave". VSWR is
the ratio between the power that is sent forward to the cable and/or antenna and the amount
of the power that is reflected back to the transmitter.
Some of the consequences of having a high VSWR condition in cellular services are dropped
calls, poor reception, and an overall unacceptable performance in the cell (or section of cell)
coverage covered by the base station antenna. Therefore, the VSWR of the antenna system
including the feed line is one of the most critical factors in the service and maintenance of the
RF transmitter systems.
VSWR
Chapter 5 Reflection Testing
In telecommunications, standing wave ratio (SWR) is the ratio of the amplitude of a partial
standing wave at its maximum amplitude and at its minimum, in an electrical transmission
line. The SWR is usually defined as a voltage ratio called the VSWR, for voltage standing
wave ratio. For example, the VSWR value 1.2:1 denotes the maximum standing wave
amplitude that is 1.2 times greater than the minimum standing wave value.
Return loss
In telecommunications, return loss is a measure of power reflected from imperfections in an
electrical or optical communication link. The ratio (PR / PT), represents the wave power
reflected from the imperfection (PR) to that of the incident, or transmitted, wave, (PT). For
maximum transmitted power, the return loss should be as small as possible, meaning the
ratio PR / PT should be as small as possible.
Return loss is usually expressed in dB and the return loss value describes the reduction in
the amplitude of the reflected energy, as compared to the forward energy. It will always be a
loss and therefore a negative dB. However, you can write -3 dB simply as 3 dB of loss,
dropping the negative sign and adding loss. For example, if a device has 15 dB of return loss,
the reflected energy from that device (PR), is always 15 dB lower than the transmitted energy
(PT). When expressed in dB, larger (in magnitude) negative numbers represent larger return
losses and thus smaller reflected power (PR).
In electrical systems, return losses often occur at junctions between transmission lines and
terminating impedances. It is a measure of the dissimilarity between impedances in metallic
transmission lines and loads. For devices that are not perfect transmission lines or purely
resistive loads, the return loss value varies with the frequency of the transmitted signal.
CellAdvisor JD720C Series User’s Manual 43
Chapter 5 Reflection Testing
NOTE
You can also view reflection measurements in Smith Chart to help you graphically identify
problems with transmission lines.
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Limit Line(s) – Traces out of the specified limits are displayed in red color
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement Setting Information
Screen Menu and Screen Keys
Display screen
Figure 14 shows an example of Reflection measurement.
Figure 14 Reflection measurement screen
44 CellAdvisor JD720C User's Manual
Procedure
1 Press the MODE hard key, and then select the Single Layout tab.
2 Double-tap the Reflection VSWR or Reflection Return Loss icon as needed.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
Preparing for a measurement
Selecting measurement mode
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 15 Frequency setup window for reflection measurements
Chapter 5 Reflection Testing
CellAdvisor JD720C Series User’s Manual 45
Chapter 5 Reflection Testing
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 16 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Figure 16 Band list window
46 CellAdvisor JD720C User's Manual
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
Chapter 5 Reflection Testing
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for the Reflection mode is 1 to 65 in VSWR and
-60 to 0 dB in Return Loss.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
4 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
General parameters
You can select options for Data Points and Interference Rejection. For JD725C and JD726,
you can also set the Bias Tee option if you have purchased the option 001 Bias Tee.
CellAdvisor JD720C Series User’s Manual 47
Chapter 5 Reflection Testing
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
5 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Disconnect the calibration kit from the calibration point.
2 Connect an antenna or feed line to the calibration point, where is usually at the extension cable
end if used. See Figure 17 for the cable connection diagram.
3 Your measurement result is displayed on the screen in real time.
CAUTION
Do not apply or connect power exceeding +25 dBm to the RF Out / Reflection port. When
the input signal power is greater than +25 dBm, the input power protection is triggered to
protect the instrument and a measurement comes to stop automatically.
Performing calibration
Perform the mechanical or electronic O-S-L Calibration by pressing the CAL hard key. The
instrument displays on-screen instructions for you to follow through. See “Performing
Calibration” on page 33 for more information.
Making a measurement
Once the O-S-L calibration is done, the instrument is now ready to make a reflection
measurement in VSWR or Return Loss.
48 CellAdvisor JD720C User's Manual
JD723C/724C
JD725C/726C
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
WARNING
Do not attempt to connect the instrument to the antenna when there is a risk of lightning.
Electric shock may cause malfunction of or damage to the instrument.
Figure 17 Cable connection diagram for reflection measurements
Chapter 5 Reflection Testing
Measurement examples
Figure 18 Reflection VSWR measurement screen (single layout)
CellAdvisor JD720C Series User’s Manual 49
Chapter 5 Reflection Testing
Figure 19 Reflection VSWR measurement screen (zoom zones)
Figure 20 Reflection return loss measurement screen (single layout)
Figure 21 Reflection return loss measurement screen (zoom zones)
50 CellAdvisor JD720C User's Manual
Chapter 5 Reflection Testing
Figure 22 Reflection VSWR & DTF return loss measurement screen (horizontal layout)
Figure 23 Reflection return loss & smith chart measurement screen (vertical layout)
Analyzing measurement results
You can use the Marker, Peak, Trace, Limit, Hold and Auto Scale hard keys and Zoom Zone
function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
CellAdvisor JD720C Series User’s Manual 51
Chapter 6 DTF Testing
This chapter provides instructions on how to perform DTF (Distance to Fault) measurements
in VSWR or Return Loss. Topics discussed in this chapter are as follows:
Introducing DTF measurements .......................................................................................... 53
Preparing for a measurement .............................................................................................. 54
Making a measurement ....................................................................................................... 59
Analyzing measurement results ........................................................................................... 62
6
CellAdvisor JD720C User's Manual
Introducing DTF measurements
While VSWR is an indicator to express the efficiency of the cell site's energy transmission,
DTF is a measurement to identify the fault locations in the antenna line system. Most of the
antenna line system consists of various types of coaxial cables, connectors, and devices
such as dividers and surge arrestors.
Since VSWR is a measurement to verify the impedance discontinuity of the total feed line
system, it is necessary to perform DTF measurement to identify the exact component that is
contributing to the performance degradation of the line system. The DTF measurement
makes it easy to identify the fault location by displaying the relative distance of the signal
reflections or discontinuities from various points of the transmission system.
In DTF measurements, the instrument transmits a test signal along the conductor or
transmission medium. If the conductor is of uniform impedance and properly terminated, the
entire transmitted signal will be absorbed in the far-end termination and no signal will be
reflected toward the instrument. Any impedance discontinuities will cause some of the
incident signal to be sent back towards the source.
Higher impedance creates a reflection that reinforces the original signal whilst lower
impedance creates a reflection that opposes the original signal. The resulting reflected signal
that is measured at the output/input to the instrument is displayed or plotted as a function of
time and, because the speed of signal propagation is relatively constant for a given
transmission medium, it can be read as a function of cable length or distance location.
Because of this sensitivity to impedance variations, the instrument may be used to verify
cable impedance characteristics, splice and connector locations and associated losses, and
estimate cable lengths or faulty location.
Display screen
Chapter 6 DTF Testing
Figure 24 shows an example of DTF measurement.
Figure 24 DTF measurement screen
CellAdvisor JD720C Series User’s Manual 53
Chapter 6 DTF Testing
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Limit Line(s) – Traces out of the specified limits are displayed in red color
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement Setting Information
Screen Menu and Screen Keys
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the DTF VSWR or DTF Return Loss icon as needed.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Preparing for a measurement
Selecting measurement mode
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
54 CellAdvisor JD720C User's Manual
Procedure
1 Press the SETUP hard key and touch the Frequency/Distance tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 26 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Figure 25 Frequency/distance setup window for DTF measurements
Chapter 6 DTF Testing
CellAdvisor JD720C Series User’s Manual 55
Chapter 6 DTF Testing
Procedure
1 Press the SETUP hard key and touch the Frequency/Distance tab.
2 Select the cell next to the Start Distance. Use the numeric keys or the rotary knob to change the
start distance value.
3 Select the cell next to the Stop Distance. Use the numeric keys or the rotary knob to change the
stop distance value.
4 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
Figure 26 Band list window
Distance
You can also manually set a distance to be measured by entering start and stop distances.
The maximum measurable distance is dependent on the frequency you set. You can set any
values within the maximum measurable distance, but optimum resolution is achieved when
you set the distance same as the maximum measurable distance, which is displayed in the
measurement setting information bar at the bottom of the measurement screen.
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
56 CellAdvisor JD720C User's Manual
Chapter 6 DTF Testing
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for the DTF mode is 1 to 65 in VSWR and -60 to 0 dB in Return Loss.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the method of video filtering to display the trace, select the Windowing option from the
following choices:
– Rectangular
– Blackman
– NSL (Nominal Side Lobe)
– LSL (Low Side Lobe)
– MSL (Minimum Side Lobe)
NOTE
If the video filtering is activated by selecting a different type of Windowing filters,
Rectangular or Blackman, the overshoots of the trace are reduced by smoothing out
the sharp transitions so that you can easily discriminate noises and peaks. For
example, if you select the Blackman, noises around peaks are reduced and it helps
you verify a DTF location clearly.
3 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. The larger number you choose, the lower resolution you get
even though you can have longer Max Distance to measure. Changing data points
does not affect calibration status.
4 To change the display unit for distance, select the Units option from the choices: Meter and Foot.
NOTE
Setting your city and time zone automatically changes not only the date and time but
also the distance unit in the DTF settings accordingly to Meter or Foot.
General parameters
You can select options for Windowing, Data Points, Distance Unit, and Interference
Rejection.
CellAdvisor JD720C Series User’s Manual 57
Chapter 6 DTF Testing
5 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
6 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
7 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Press the SETUP hard key and touch the Cable Definition tab.
2 Touch the icon next to the Cable Name field.
The Cable List window appears, displaying standard cables stored in the instrument and custom
cables created in the JDViewer.
3 Select a cable to choose from the list and then tap the Apply button on the Cable List window.
The instrument automatically changes the Propagation Velocity and Cable Loss values
correspondent to the selected cable's propagation velocity and cable loss. Default setting is
HFC-12D (1/2").
4 If you want to define a new cable, complete the following steps:
a Select the Propagation Velocity field, and then enter the propagation velocity of the cable
by using the numeric keys or the rotary knob.
NOTE
You can set this relative propagation delay of the cable to be defined. It affects
the calculation of distance in DTF measurements.
b Select the Cable Loss field, and then enter the cable loss value of the cable by using the
numeric keys or the rotary knob.
NOTE
You can set this cable loss of the cable, for which you like to define. It affects the
peak level of discontinuity in DTF measurements. If you select a cable from the
list, the cable loss value is displayed as "@ 1 GHz". If you define a cable
manually, its value is displayed as "@ Custom Frequency".
The text “Custom Cable” appears in the Cable Name field.
5 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Defining cable
You can select a cable from the list of cable names stored in the instrument or define a cable
as custom cable by setting the propagation velocity and cable loss parameters.
58 CellAdvisor JD720C User's Manual
Procedure
1 Disconnect the calibration kit from the calibration point.
2 Connect an antenna or feed line to the calibration point, where is usually at the extension cable
end if used. See Figure 27 for the cable connection diagram.
3 Your measurement result is displayed on the screen in real time.
NOTE
If O-S-L or Quick calibration has been done at the end of the port extension cable for DTF
measurement, the length of the port extension cable is compensated automatically and is
not included in the distance to the point of discontinuity.
CAUTION
Do not apply or connect power exceeding +25 dBm to the RF Out / Reflection port. When
the input signal power is greater than +25 dBm, the input power protection is triggered to
protect the instrument and a measurement comes to stop automatically.
JD723C/724C
JD725C/726C
Performing calibration
Perform an O-S-L or Quick calibration by pressing the CAL hard key. The instrument
displays on-screen instructions for you to follow through. See “Performing Calibration” on
page 33 for more information.
Making a measurement
Once the O-S-L or Quick calibration is done, the instrument is now ready to make a DTF
measurement in VSWR or Return Loss. If you like to not only measure the DTF cable length
but also get highly accurate and reliable data, you need to perform a full O-S-L calibration.
Chapter 6 DTF Testing
Figure 27 Cable connection diagram for DTF measurements
CellAdvisor JD720C Series User’s Manual 59
Chapter 6 DTF Testing
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
WARNING
Do not attempt to connect the instrument to the antenna when there is a risk of lightning.
Electric shock may cause malfunction of or damage to the instrument.
Measurement examples
Figure 28 DTF VSWR measurement screen (single layout)
Figure 29 DTF return loss measurement screen (single layout)
60 CellAdvisor JD720C User's Manual
Chapter 6 DTF Testing
Figure 30 DTF return loss measurement screen (alternate sweep on)
Figure 31 Reflection VSWR & DTF return loss measurement screen (horizontal layout)
Figure 32 DTF VSWR & Smith chart measurement screen (vertical layout)
CellAdvisor JD720C Series User’s Manual 61
Chapter 6 DTF Testing
Analyzing measurement results
You can use the Marker, Peak, Trace, Limit, Hold and Auto Scale hard keys and Alternate
Sweep function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
62 CellAdvisor JD720C User's Manual
Chapter 7 1-Port Cable Loss Testing
This chapter provides instructions on how to perform 1 Port Cable Loss measurements that
are used to quantify signal loss in a cable or other device without connecting both ends of the
cable or device to the instrument. Topics discussed in this chapter are as follows:
Introducing 1-port cable loss measurements ....................................................................... 64
Preparing for a measurement .............................................................................................. 65
Making a measurement ....................................................................................................... 68
7
Analyzing measurement results ........................................................................................... 70
CellAdvisor JD720C User's Manual
Chapter 7 1-Port Cable Loss Testing
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Limit Line(s) – Traces out of the specified limits are displayed in red color
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Introducing 1-port cable loss measurements
The 1 Port Cable Loss measurement checks the signal attenuation level of the cable. The
frequency band to measure the characteristics of a cable must be calibrated before
performing the cable loss measurement. This measurement can be especially useful in
measuring the loss of feed line connected to the antenna. By placing a short at the end of the
cable or leaving it open, the signal is reflected back and the energy lost in the cable can be
computed. Cables with larger diameter generally have less insertion loss and better power
handling capabilities than cables with smaller diameter.
Display screen
Figure 33 shows an example of 1 Port Cable Loss measurements.
Figure 33 1 port cable loss measurement screen
64 CellAdvisor JD720C User's Manual
Measurement Setting Information
Screen Menu and Screen Keys
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the 1 Port Cable Loss icon.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
Preparing for a measurement
Selecting measurement mode
Setting parameters
Chapter 7 1-Port Cable Loss Testing
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 34 Frequency setup window for cable loss measurements
CellAdvisor JD720C Series User’s Manual 65
Chapter 7 1-Port Cable Loss Testing
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 35 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Figure 35 Band list window
66 CellAdvisor JD720C User's Manual
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
Chapter 7 1-Port Cable Loss Testing
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for this measurement mode is 0 to 30 dB.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace and the limit.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
General parameters
You can select options for Data Points and Interference Rejection.
CellAdvisor JD720C Series User’s Manual 67
Chapter 7 1-Port Cable Loss Testing
4 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
5 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Do one of the following:
– Disconnect the calibration kit from the calibration point and leave it open.
– Connect the calibration kit’s SHORT standard as shown in Figure 36.
2 Your measurement result is displayed on the screen in real time.
JD723C/724C
Performing calibration
Perform the O-S-L Calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See “Performing Calibration” on page 33 for
more information.
Making a measurement
Once the O-S-L calibration is done, the instrument is now ready to make a cable loss
measurement.
Figure 36 Cable connection diagram for cable loss measurements
68 CellAdvisor JD720C User's Manual
JD725C/726C
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
Measurement examples
Figure 37 1 port cable loss measurement screen (single layout)
Chapter 7 1-Port Cable Loss Testing
CellAdvisor JD720C Series User’s Manual 69
Chapter 7 1-Port Cable Loss Testing
Figure 38 1 port cable loss measurement screen (zoom zones)
Analyzing measurement results
You can use the Marker, Peak, Trace, Limit, Hold and Auto Scale hard keys and Zoom Zone
function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
70 CellAdvisor JD720C User's Manual
Chapter 8 1-Port Phase Testing
This chapter provides instructions on how to perform 1 Port Phase measurements to tune
DUT’s impedance matching and phase match cables. Topics discussed in this chapter are as
follows:
Introducing 1-port phase measurements ............................................................................. 72
Preparing for a measurement .............................................................................................. 73
Making a measurement ....................................................................................................... 76
8
Analyzing measurement results ........................................................................................... 77
CellAdvisor JD720C User's Manual
Chapter 8 1-Port Phase Testing
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement Setting Information
Screen Menu and Screen Keys
Introducing 1-port phase measurements
You can use 1 Port Phase mode to measure S11 phase when you want to tune antennas and
phase match cables.
Display screen
Figure 39 shows an example of 1 Port Phase measurements.
Figure 39 1 port phase measurement screen
72 CellAdvisor JD720C User's Manual
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the 1 Port Phase icon.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
Preparing for a measurement
Selecting measurement mode
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 40 Frequency setup window for 1 port phase measurements
Chapter 8 1-Port Phase Testing
CellAdvisor JD720C Series User’s Manual 73
Chapter 8 1-Port Phase Testing
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 41 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Figure 41 Band list window
74 CellAdvisor JD720C User's Manual
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
Chapter 8 1-Port Phase Testing
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for this measurement mode is -180 to 180 Degree.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
4 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
a Select On for the Bias Tee.
General parameters
You can select options for Data Points and Interference Rejection.
CellAdvisor JD720C Series User’s Manual 75
Chapter 8 1-Port Phase Testing
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
5 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Disconnect the calibration kit from the calibration point.
2 Connect an antenna or feed line to the calibration point, where is usually at the extension cable
end if used. See Figure 42 for the cable connection diagram.
3 Your measurement result is displayed on the screen in real time.
CAUTION
Do not apply or connect power exceeding +25 dBm to the RF Out / Reflection port. When
the input signal power is greater than +25 dBm, the input power protection is triggered to
protect the instrument and a measurement comes to stop automatically.
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
WARNING
Do not attempt to connect the instrument to the antenna when there is a risk of lightning.
Electric shock may cause malfunction of or damage to the instrument.
Performing calibration
Perform the O-S-L Calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See “Performing Calibration” on page 33 for
more information.
Making a measurement
Once the O-S-L calibration is done, the instrument is now ready to make a measurement.
76 CellAdvisor JD720C User's Manual
Chapter 8 1-Port Phase Testing
JD723C/724C
JD725C/726C
Figure 42 Cable connection diagram for 1 port phase measurements
Measurement examples
Figure 43 1 port phase measurement screen (single layout)
Analyzing measurement results
You can use the Marker, Peak, Trace, Hold and Auto Scale hard keys and Zoom Zone
function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
CellAdvisor JD720C Series User’s Manual 77
Chapter 9 Smith Chart Testing
This chapter provides instructions on how to perform reflection measurements in Smith Chart.
Topics discussed in this chapter are as follows:
Introducing Smith chart measurements ............................................................................... 79
Preparing for a measurement .............................................................................................. 80
Making a measurement ....................................................................................................... 82
Analyzing measurement results ........................................................................................... 84
9
CellAdvisor JD720C User's Manual
No.
Description
Measurement mode name
Measurement chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Measurement setting information
Trace legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement result table
Screen menu and screen keys
Introducing Smith chart measurements
You can view reflection measurements in Smith Chart, which is used to display impedance
matching characteristics in the cable and antenna system as well as filter and duplexers
devices. It helps you graphically identify problems with transmission lines.
Display screen
Figure 44 shows an example of Smith chart measurements.
Figure 44 Smith chart measurement screen
Chapter 9 Smith Chart Testing
CellAdvisor JD720C Series User’s Manual 79
Chapter 9 Smith Chart Testing
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the Smith Chart icon.
NOTE
You can choose two measurement modes from the Vertical Layout tab if you want to
view dual measurements displayed side by side.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
Preparing for a measurement
Selecting measurement mode
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 45 Frequency setup window for Smith chart measurements
80 CellAdvisor JD720C User's Manual
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 46 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
Figure 46 Band list window
Chapter 9 Smith Chart Testing
CellAdvisor JD720C Series User’s Manual 81
General parameters
You can select options for Data Points and Interference Rejection.
Chapter 9 Smith Chart Testing
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
4 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
5 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Disconnect the calibration kit from the calibration point.
2 Connect an antenna or feed line to the calibration point, where is usually at the extension cable
end if used. See Figure 47 for the cable connection diagram.
3 Your measurement result is displayed on the screen in real time.
CAUTION
Do not apply or connect power exceeding +25 dBm to the RF Out / Reflection port. When
the input signal power is greater than +25 dBm, the input power protection is triggered to
protect the instrument and a measurement comes to stop automatically.
Performing calibration
Perform the O-S-L Calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See “Performing Calibration” on page 33 for
more information.
Making a measurement
Once the O-S-L calibration is done, the instrument is now ready to make a measurement.
82 CellAdvisor JD720C User's Manual
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
JD723C/724C
JD725C/726C
WARNING
Do not attempt to connect the instrument to the antenna when there is a risk of lightning.
Electric shock may cause malfunction of or damage to the instrument.
Figure 47 Cable connection diagram for Smith chart measurements
Chapter 9 Smith Chart Testing
Measurement examples
Figure 48 Smith chart measurement screen (single layout)
CellAdvisor JD720C Series User’s Manual 83
Chapter 9 Smith Chart Testing
Figure 49 DTF VSWR & Smith chart measurement screen (vertical layout)
Analyzing measurement results
You can use the Marker, Trace, and Hold hard keys for your analysis of the results. You can
also use Favorite, Quick Save, and Save/Load functions. See "Analysis" on page 125 and
“Operation” on page 138 for details.
84 CellAdvisor JD720C User's Manual
Chapter 10 2-Port Transmission Testing
This chapter provides instructions on how to perform the 2-Port Transmission measurement
that is a standard feature for JD725C and an option (002) for JD726C. It is used to quantify
signal gain or loss in a cable or other devices with connecting both ends of the cable or
device to the instrument. Topics discussed in this chapter are as follows:
Introducing 2-port transmission measurements ................................................................... 86
Preparing for a measurement .............................................................................................. 87
Making a measurement ....................................................................................................... 91
Analyzing measurement results ........................................................................................... 92
10
CellAdvisor JD720C User's Manual
Chapter 10 2-Port Transmission Testing
Introducing 2-port transmission measurements
The 2 Port Transmission measures the level of the signal attenuation of passive RF elements
such as cables and filters, or the level of gains of active RF elements such as amplifiers. The
frequency band to measure the characteristics of a cable must be calibrated before
performing the insertion loss/gain measurement.
Gain
The gain is the gain resulting from the insertion of a device in a transmission line, expressed
as the ratio of the signal power delivered to that part of the line following the device to the
signal power delivered to that same part before insertion.
Insertion loss
The insertion loss is the loss of the transmitted signal power resulting from the insertion of a
device in a transmission line. It is usually expressed relative to the signal power delivered to
that same part before insertion. In most systems, insertion loss is introduced by things such
as connectors, splitters, or couplers.
The insertion loss of a device (which may be a whole line) may also be referred to as
attenuation. Line terminations play an important part in the insertion loss because they reflect
some of the power. Apart from this, it is clear that not all of the power that is sent in to the line
at one end appears at the other. This is because of radiation losses, resistive losses in the
conductor as well as losses in the surrounding dielectric. The loss resulted from inserting a
transmission line between a source and a load is called the insertion loss of the line.
If the power transmitted by the source is PT and the power received by the load is PR, then
the insertion loss is given by PR divided by PT. For maximum power transfer the insertion
loss should be as small as possible. In other words, the ratio PR/PT should be as close to
one as possible, which in decibels means as close to 0 dB as possible.
Display screen
Figure 50 shows an example of 2 Port Transmission measurements.
86 CellAdvisor JD720C User's Manual
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement Setting Information
Screen Menu and Screen Keys
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the 2 Port Transmission icon.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Figure 50 2 port transmission measurement screen
Chapter 10 2-Port Transmission Testing
Preparing for a measurement
Selecting measurement mode
CellAdvisor JD720C Series User’s Manual 87
Chapter 10 2-Port Transmission Testing
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 52 for example.
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 51 Frequency setup window for 2-port transmission measurements
88 CellAdvisor JD720C User's Manual
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
Figure 52 Band list window
Chapter 10 2-Port Transmission Testing
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
CellAdvisor JD720C Series User’s Manual 89
Chapter 10 2-Port Transmission Testing
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for this measurement mode is -100 to 100 dB.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace and the limit.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To set the level of the output power to be inserted, select the Output Power option from the
following choices:
– 0 dBm: To test your DUT’s loss if it a passive RF device such as cable or filter.
– -30 dBm: To test your DUT’s gain if it is an active RF device such as amplifier.
NOTE
Default setting is 0 dBm. The output power -30 dBm may reduce measurement
dynamic range.
Changing the output power level after calibration affects the calibration status and it
requires you to perform a new calibration.
4 To set the number of measurements to be averaged, complete the following steps:
a Select the input box next to the Average.
b Enter a value between one and five.
5 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
6 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
General parameters
You can set parameters for Data Points, Interference Rejection, Bias Tee, Output Power, and
Average.
90 CellAdvisor JD720C User's Manual
Chapter 10 2-Port Transmission Testing
complete the following steps:
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
7 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Disconnect the calibrated extension cable from the RF In port of the instrument.
2 Connect your DUT between the extension cable and the RF In port as illustrated in Figure 54.
3 Your measurement result is displayed on the screen in real time.
Figure 53 General setup window for 2 port transmission measurement
Performing calibration
Perform the O-S-L-Thru calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See “Performing 2-port calibration” on page
40 for more information.
Making a measurement
Once the calibration is done, the instrument is now ready to make a measurement.
CellAdvisor JD720C Series User’s Manual 91
Chapter 10 2-Port Transmission Testing
JD725C/726C
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
Figure 54 Connection diagram for 2-port transmission measurements
Measurement examples
Figure 55 2 port transmission measurement screen (single layout)
Analyzing measurement results
You can use the Marker, Peak, Trace, Limit, Hold and Auto Scale hard keys and Zoom Zone
function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
92 CellAdvisor JD720C User's Manual
Chapter 11 2-Port Phase Testing
This chapter provides instructions on how to perform the 2 Port Phase measurement that is a
standard feature for JD725C and an option (002) for JD726C. Topics discussed in this
chapter are as follows:
Introducing 2-port phase measurements ............................................................................. 94
Preparing for a measurement .............................................................................................. 95
Making a measurement ....................................................................................................... 98
Analyzing measurement results ........................................................................................... 99
11
CellAdvisor JD720C User's Manual
Chapter 11 2-Port Phase Testing
No.
Description
Measurement Mode Name
Measurement Chart
Trace(s) – Up to 4 traces
Marker(s) – Up to 6 markers
Readout for Active Marker
Trace Legend – For "Indoor" display mode
Trace 1
Active Marker
for each trace
C
Captured Trace
Trace 2
W
Current Trace (Clear Write)
Trace 3
L
Loaded Trace
Trace 4
F
Trace Off
Measurement Setting Information
Screen Menu and Screen Keys
Introducing 2-port phase measurements
You can use 2 Port Phase mode to determine your DUT’s S21 phase characteristics.
Display screen
Figure 56 shows an example of 2 Port Phase measurements.
Figure 56 2 port phase measurement screen
94 CellAdvisor JD720C User's Manual
Preparing for a measurement
Procedure
1 Press the MODE hard key and then select the Single Layout tab.
2 Double-tap the 2 Port Phase icon.
NOTE
You can choose two measurement modes from each window in the Horizontal Layout or
Vertical Layout tab if you want to view dual measurements displayed on one screen.
Procedure
1 Press the SETUP hard key and touch the Frequency tab.
2 Do one of the following:
– To set the start and stop frequencies, complete the following steps:
a Select the cell next to the Start Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Stop Frequency.
Selecting measurement mode
Setting parameters
Frequency
You can manually set a frequency band to be measured by entering start and stop
frequencies, or center frequency and span. You can also select a frequency band from the
band list stored in the instrument. It is desirable to set the frequency to a value that covers a
normal range of the measurement with enough margins.
Figure 57 Frequency setup window for 2 port phase measurements
Chapter 11 2-Port Phase Testing
CellAdvisor JD720C Series User’s Manual 95
Chapter 11 2-Port Phase Testing
d Enter a value by using the numeric keys or the rotary knob.
– To set the center frequency and the span, complete the following steps:
a Select the cell next to the Center Frequency.
b Enter a value by using the numeric keys or the rotary knob.
c Select the cell next to the Span.
d Enter a value by using the numeric keys or the rotary knob.
– To select a band from the band list, complete the following steps:
a Touch the icon next to the band list.
The Band List window appears. It displays a list of standard bands stored in the
instrument and custom bands created in the JDViewer. See Figure 58 for example.
b Highlight your choice from the list, and then tap the Apply button on the Band List
window.
The instrument automatically updates the values in the Start Frequency and Stop
Frequency cells with the selected band's start and stop frequencies.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
Frequency changes after calibration affect the calibration status. If changed within the
registered band, the status turns into CAL ON (I) and it does not require re-calibration. If
changed off the registered band, the status turns into CAL OFF and it requires
re-calibration.
Figure 58 Band list window
96 CellAdvisor JD720C User's Manual
Amplitude
You can set maximum and minimum values of the Y-scale manually by setting the Top and
Bottom amplitudes or restore the instrument's default full scale defined for each
measurement mode. You can also optimize the Y-scale automatically so that an entire trace
can be displayed on the measurement chart. Adjusting Y-scale does not affect calibration
status.
Chapter 11 2-Port Phase Testing
Procedure
1 Press the SETUP hard key and touch the Amplitude tab.
2 Do one of the following:
– To set the Top and Bottom amplitudes manually, complete the following steps:
a Select the cell next to the Top.
b Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the maximum value for the Y-scale.
c Select the cell next to the Bottom.
d Enter a value by using the numeric keys or the rotary knob.
The entered value becomes the minimum value for the Y-scale.
– To restore the instrument’s default range for the Y-scale, tap the Full Scale button.
The amplitude range for this measurement mode is -180 to 180 Degree.
3 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
NOTE
You can also press the AUTO SCALE hard key any time you need to view the
entire trace on the measurement chart. The instrument automatically optimizes the
maximum and minimum values of the Y-scale to display the entire trace.
Procedure
1 Press the SETUP hard key and touch the General tab.
2 To set the measurement resolution, select the Data Points option from the choices: 126, 251,
501, 1001, and 2001.
NOTE
Default setting is 1001. It is recommended that you select high resolution data points
only for an instance of measuring wide frequency bands or requiring precise
measurement data.
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. For example, selecting 501 data points
provides twice as many measurement points as 251, but it may take twice longer to
sweep and display the trace than choosing 251 data points. Changing data points
does not affect calibration status.
3 To set the level of the output power to be inserted, select the Output Power option from the
following choices:
– 0 dBm: To test your your DUT’s loss if it is a passive RF device such as cable or filter.
– -30 dBm: To test your DUT’s gain if it is an active RF device such as amplifier.
NOTE
Default setting is 0 dBm. The output power -30 dBm may reduce measurement
dynamic range.
Changing the output power level after calibration affects the calibration status and it
General parameters
You can select options for Data Points and Interference Rejection.
CellAdvisor JD720C Series User’s Manual 97
Chapter 11 2-Port Phase Testing
requires you to perform a new calibration.
4 To set the number of measurements to be averaged, complete the following steps:
a Select the input box next to the Average.
b Enter a value between one and five.
5 To enable the Interference Rejection feature, select On.
NOTE
Default setting is Off. It is recommended to use this feature only when you suspect
interfering signals in the area as it slows down measurement.
6 For JD725C and JD726C users with the option 001 Bias Tee installed. To use the Bias Tee,
complete the following steps:
a Select On for the Bias Tee.
b Enter a value between 12 and 32 with 1 V step, as you desire.
NOTE
If you have set this Bias Tee to On, the instrument will supply a DC bias of set level
(12 – 32 V) from the RF In port to an active device, such as Tower Mounted Amplifier
(TMA) or Low Noise Amplifier (LNA), through the transmission line, eliminating the
need of an external power supply.
7 Tap the Apply button in the lower-right corner of the setup screen to save the change(s).
Procedure
1 Disconnect the calibrated extension cable from the RF In port of the instrument.
2 Connect your DUT between the extension cable and the RF In port as illustrated in Figure 59.
3 Your measurement result is displayed on the screen in real time.
Performing calibration
Perform the O-S-L-Thru Calibration by pressing the CAL hard key. The instrument displays
on-screen instructions for you to follow through. See “Performing 2-port calibration” on page
40 for more information.
Making a measurement
Once the calibration is done, the instrument is now ready to make a measurement.
98 CellAdvisor JD720C User's Manual
Figure 59 Connection diagram for 2-port phase measurements
JD725C/726C
NOTE
Do not change the connected port extension cable or frequency settings, or it may cause a
measurement error.
Measurement examples
Chapter 11 2-Port Phase Testing
Figure 60 2 port phase measurement screen (single layout)
Analyzing measurement results
You can use the Marker, Peak, Trace, Limit, Hold and Auto Scale hard keys and Zoom Zone
function for your analysis of the results. You can also use Favorite, Quick Save and
Save/Load functions. See "Analysis" on page 125 and “Operation” on page 138 for details.
CellAdvisor JD720C Series User’s Manual 99
12
Chapter 12 High Power CW Signal Generating
This chapter provides instructions on how to use the CW Signal Generator function
(option 005) with JD275C and JD726C. Topics discussed in this chapter are as follows:
Introducing RF source ........................................................................................................ 101
Using RF source ................................................................................................................ 101
CellAdvisor JD720C User's Manual
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