Viavi CT-4 User Manual
CT-4
Digital Leakage Tagger
User’s Guide
Notice
Every effort was made to ensure that the information in this manual was accurate at the time
of printing. However, information is subject to change without notice, and VIAVI reserves the
right to provide an addendum to this manual with information not available at the time that this
manual was created.
Copyright/Trademarks
© Copyright 2018 VIAVI Solutions Inc. All rights reserved. No part of this guide may be
reproduced or transmitted, electronically or otherwise, without written permission of the
publisher. VIAVI Solutions and the VIAVI logo are trademarks of VIAVI Solutions Inc. (“Viavi”).
All other trademarks and registered trademarks are the property of their respective owners.
Copyright release
Reproduction and distribution of this guide is authorized for US Government purposes only.
Ordering information
This guide is a product of VIAVI Technical Publications Department, issued as part of the
product. The catalog number for a published guide is Catalog Number - printed. The catalog
number for an electronic guide on USB is Catalog Number - electronic.
Terms and conditions
Specications, terms, and conditions are subject to change without notice. The provision
of hardware, services, and/or software are subject to VIAVI standard terms and conditions,
available at www.viavisolutions.com/en/terms-and-conditions.
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 2
Table of Contents
Chapter 1
General Information ..................................................................................................................5
Ordering Information ..............................................................................................................5
Where to Get Technical Support ............................................................................................5
How this Manual is Organized ...............................................................................................6
Conventions Used in this Manual...........................................................................................7
Precautions ............................................................................................................................7
Periodic Calibration ................................................................................................................7
Chapter 2
Introduction ................................................................................................................................9
What is the CT-4? ..................................................................................................................9
CT-2/3 Operation ..............................................................................................................9
CT-2/3 Application...........................................................................................................10
CT-4 Operation ...............................................................................................................10
CT-4 Application.............................................................................................................. 11
Equipment Supplied with Your CT-4.....................................................................................11
Accessories & Replacement Parts for Your CT-4.................................................................11
A Guided Tour of Your CT-4 .................................................................................................12
Front View .......................................................................................................................12
Rear View .......................................................................................................................13
Display Screen Navigation..............................................................................................14
Chapter 3
Installation ................................................................................................................................21
Overview ..............................................................................................................................21
Installation Instructions.........................................................................................................22
CT-2 Operation ...............................................................................................................22
CT-3 Operation ...............................................................................................................23
CT-4 Operation ...............................................................................................................23
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 3
Chapter 4
Setup .........................................................................................................................................25
Setup Guidelines ..................................................................................................................25
Leakage Receiver Tag Detection Support ......................................................................25
Tag Modulation Settings .................................................................................................26
CT-2 Operation Mode Setup ................................................................................................27
CT-3 Operation Mode Setup ................................................................................................28
CT-4 Operation Mode Setup ................................................................................................30
Example Setup Using a Spectrum Analyzer ...................................................................33
Typical Spectrum Analyzers ......................................................................................33
Advanced Spectrum Analyzers .................................................................................34
Example CT-4 Setup Scenarios......................................................................................35
All Analog (Low Band) & All Digital (High Band) Adjacent Carriers ...........................35
Mixed (Low Band) & All Digital (High Band) Adjacent Carriers .................................36
All Digital (Low Band) & All Digital (High Band) Adjacent Carriers ............................ 38
Mixed Digital (Low & High Band) Adjacent Carriers ..................................................39
Single Adjacent Carriers ............................................................................................40
No Adjacent Carriers .................................................................................................41
CT-3 Tech Setup ..................................................................................................................42
Ethernet Setup .....................................................................................................................43
CT Security Setup ................................................................................................................44
Chapter 5
Appendix ..................................................................................................................................45
General Specications .........................................................................................................45
CT-2 Operation Mode Specications ...................................................................................45
CT-3 Operation Mode Specications ...................................................................................46
CT-4 Operation Mode Specications ...................................................................................47
CT-4 Error Codes .................................................................................................................48
Limited Warranty ..................................................................................................................49
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 4
Chapter 1
General Information
Ordering Information
For additional information about our products and services, contact your local VIAVI
representative or visit https://www.viavisolutions.com/en-us/how-buy.
Where to Get Technical Support
Phone US: +1-844-GO-VIAVI or +1-844-468-4284
Outside US: +1-855-275-5378
Email: Trilithic.support@viavisolutions.com
Website: https://support.viavisolutions.com/welcome
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 5
How this Manual is Organized
This manual is divided into the following chapters:
• Chapter 1, “General Information” provides contact information and describes how this
operation manual is structured.
• Chapter 2, “Introduction” introduces what the CT-4 is and what it does. This chapter
discusses the practical application, connections and controls of the CT-4.
• Chapter 3, “Installation” describes steps needed to install the CT-4.
• Chapter 4, “Setup” describes the steps needed to perform initial conguration of the
CT-4 and describes the sreps needed to perform periodic calibration of the CT-4.
• Chapter 5, “Appendix” shows the technical specications of the CT-4.
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 6
Conventions Used in this Manual
This manual has several standardized conventions for presenting information:
• Connections, menus, menu options, and user-entered text and commands appear in
bold.
• Section names, web, and e-mail addresses appear in italics.
A NOTE is information that will be of assistance to you related
to the current step or procedure.
A CAUTION alerts you to any condition that could cause a
mechanical failure or potential loss of data.
A WARNING alerts you to any condition that could cause
personal injury.
Precautions
Do not use the CT-4 in any manner not recommended by the
manufacturer
The CT-4 may not operate correctly in the presence of a
strong electromagnetic eld.
Periodic Calibration
The chosen frequency must closely match that of the leakage detector or leaks will not be
detected properly. If the CT-4 appears to be out of calibration, the unit must be returned to
VIAVI or a VIAVI authorized repair center for re-calibration.
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 7
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 8
Chapter 2
Introduction
This chapter:
• Describes the purpose of the CT-4
• Gives a feature overview of the CT-4
• Lists the equipment supplied with the CT-4 and optional accessories
• Gives a guided tour of the CT-4 and explains the display screen
What is the CT-4?
The CT-4 is a 1U rack mounted unit that is located in the headend that provides an
uncompromising tagging solution for active analog or digital systems.
CT-2/3 Operation
The new CT-4 can act as a traditional CT-2 or CT-3 analog tagger. This feature provides
the ability to detect tagged leaks and ignore untagged leaks, saving time from false alarms
from signals not originating in your system.
When several CATV systems operate in the same area, it is often difcult to determine
which system is the source of a detected leak. The CT-4 is designed to deal with the
problem of leakage identication in dual cable or overbuilt situations.
The CT-4 solves the problem of determining which cable is leaking by attaching a low
frequency tag to the analog leakage carrier on the cable system.
VIAVI leakage receivers with analog tag detection including the Searcher Plus GT, Super
Plus, Seeker Lite², Seeker and Seeker SE can be set to alarm only when the leakage signal
has been tagged to insure the leak is from your system. The tagged signal from the CT-4
also causes a distinctive audible response in these leakage receivers.
VIAVI leakage receivers generate an audible tone that varies in pitch depending on the
leakage strength. When the CT-4 tags a leak, it causes this audible tone to rise and fall in
pitch at a rate of:
• 3 Hz – This is a “warble” tone that is used primarily with the Searcher Plus, Searcher
Plus GT, or Super Plus analog leakage detectors. If you do not hear this uctuating
tone, you know that the leak did not originate in your system.
• 10 to 23 Hz (excluding 16 Hz) – This is the tag frequency that is used with the
Searcher Plus GT, Super Plus, Seeker Lite², Seeker and Seeker SE leakage
detectors.
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 9
CT-2/3 Application
Used as a system with a VIAVI leakage receiver, the CT-4 helps to eliminate “false alarm”
triggers. The CT-2 and CT-3 provide the following features:
• Tags carrier used for traditional analog leakage measurement for easy identication.
• Provides low frequency modulation (3 Hz) “warble” tone for use with the Searcher
Plus, Searcher Plus GT, or Super Plus analog leakage detectors.
• Provides higher frequency modulation (10 to 23 Hz, excluding 16 Hz) tag for use
with the Super Plus, Search Lite, Seeker Lite², Seeker and Seeker SE leakage
detectors.
• Provides a built-in leakage carrier source and is non interfering because its low
frequency modulation is removed easily by the customer’s TV automatic gain
control.
CT-4 Operation
The new CT-4™ works in conjunction with the Seeker D and Seeker D Lite Digital Leakage
Detectors. The VIAVI Seeker D leakage detector accurately detects and measures signal
leakage within the LTE and aeronautical frequency bands and features unsurpassed
sensitivity from 2 to 2000 uV/m (20 to 2000 uV/m for Seeker D Lite).
The Seeker D and Seeker D Lite detect the proprietary signals from the CT-4 and scale the
leakage value to match the adjacent analog or digital carrier as programmed into the meter.
If reference analog is selected in the Seeker D, the readings will closely resemble the
readings from an analog Seeker measuring leakage off the adjacent analog carrier.
Whether testing for leaks in both digital and analog systems, or monitoring aeronautical
bands or LTE, the Seeker D and Seeker D Lite provide all of the capability to nd and x
leaks quickly, accurately, and effectively.
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 10
CT-4 Application
Used as a system with the Seeker D and Seeker D Lite Digital Leakage Detectors, the CT-4
detects leaks in the Aeronautical and LTE frequency bands and eliminates all “false alarm”
triggers. The CT-4 provides the following features:
• Provides proprietary dual CW carriers to give the Seeker D and Seeker D Lite
Leakage Detectors the ability to detect leaks in the Aeronautical Frequency Band
(135–139 MHz) and provides immunity to “false alarms”.
• Provides proprietary dual CW carriers to give the Seeker D and Seeker D Lite
Leakage Detectors the ability to detect leaks in the LTE Frequency Band (610.5–615
MHz) and provides immunity to “false alarms”.
• The CT-4 eliminates the risk of affecting any adjacent digital channels by injecting
an adjustable signal from 10 to 30 dBmV, targeting approximately 30 dB below the
chosen digital carriers.
Equipment Supplied with Your CT-4
The CT-4 comes with the following:
• CT-4 Digital Leakage Tagger
• AC U.S. Power Cable
• Operation manual on CD
Accessories & Replacement Parts for Your CT-4
The following replacement parts are available for the CT-4:
Part Number Description
0190197000
0190322000
To place an order, contact your local VIAVI representative, call 1-844-GO-VIAVI, or visit
https://www.viavisolutions.com/en-us/how-buy.
AC U.S. Power Cable
6 Foot Male (NEMA 5-15P) to Female (IEC 320C13)
AC Euro Power Cable
2.5 Meter Male (IEC 884/CEE 7/VII) to Female (IEC 320C13)
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 11
A Guided Tour of Your CT-4
Front View
1 2 3
1. Display Screen – This LCD is used to display the setup and operational status of the
CT-4. The setup information on most screens can be adjusted from the front panel of
the device.
2. Select – This button is used to control the CT-4 as follows:
• Scroll through the main menus
• Scroll through the setup/display options available within the selected sub-menu
• Adjust the settings within individual setup options after the Enter button has been
selected.
3. Enter – This button is used to control the CT-4 as follows:
• Enter the menus and sub-menus
• Select individual setup options to adjust settings
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 12
Rear View
1 2 3 4 5
1. CT-4 Output – This is the RF output connection for the CT-4 function.
2. CT-2 Input – This is the RF input connection for the CT-2 function.
3. CT-2/3 Output – This is the RF output connection for the CT-2/3 function.
4. Ethernet – This port is for factory use and rmware upgrades.
5. AC Power Input – This is a Female (IEC 320C13) port for connection of an AC power
cable. This port accepts AC input power from 90 to 370 VAC (47-440 Hz), 0.75 A.
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 13
Display Screen Navigation
The following images provide an example of the method used to navigate the menus
available on the CT-4 display screen.
Upon Startup this Screen Appears
for Approximately 10 Seconds
FROM
CT SECURITY
HOME SCREEN
INACTIVITY
TIMEOUT
Select
Enter
Select
TO
CT-4 SETUP
Select
Select
Enter
Select
ONLY AVAILABLE
WHEN ERRORS
EXIST
CT-4 User’s Guide
Document Num., Rev. 5 May 2018Page 14
FROM
CT-4 STATUS
Select
Enter
Select
TO ADJUST
SETTINGS
Enter
Select
Enter
Select
Enter
Select
Enter
Select
Enter
Select
TO
CT-3 SETUP
Select
Select
Enter
Select
Enter
Select
Enter
Select
Enter
CT-4 User’s Guide
Document Num., Rev. 5May 2018 Page 15
Loading...