Cisco GS7000 Operating instructions

Cisco 1.2 GHz GS7000 Node
Installation and Operation Guide

For Your Safety
Explanation of Warning and Caution Icons
Avoid personal injury and product damage! Do not proceed beyond any symbol
until you fully understand the indicated conditions.
The following warning and caution icons alert you to important information about
the safe operation of this product:
You may find this symbol in the document that accompanies this product.
This symbol indicates important operating or maintenance instructions.
You may find this symbol affixed to the product. This symbol indicates a live
terminal where a dangerous voltage may be present; the tip of the flash points
to the terminal device.
You may find this symbol affixed to the product. This symbol indicates a
protective ground terminal.
You may find this symbol affixed to the product. This symbol indicates a
chassis terminal (normally used for equipotential bonding).
You may find this symbol affixed to the product. This symbol warns of a
potentially hot surface.
You may find this symbol affixed to the product and in this document. This
symbol indicates an infrared laser that transmits intensity-modulated light
and emits invisible laser radiation or an LED that transmits
intensity-modulated light.
Important
Please read this entire guide. If this guide provides installation or operation
instructions, give particular attention to all safety statements included in this guide.

Notices
Trademark Acknowledgments
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its
affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this
URL: http://www.cisco.com/go/trademarks.
Third party trademarks mentioned are the property of their respective owners.
The use of the word partner does not imply a partnership relationship between
Cisco and any other company. (1110R)
Publication Disclaimer
Cisco Systems, Inc. assumes no responsibility for errors or omissions that may
appear in this publication. We reserve the right to change this publication at any
time without notice. This document is not to be construed as conferring by
implication, estoppel, or otherwise any license or right under any copyright or
patent, whether or not the use of any information in this document employs an
invention claimed in any existing or later issued patent.
Copyright
© 2015 Cisco and/or its affiliates. All rights reserved. Printed in the United States of
America.
Information in this publication is subject to change without notice. No part of this
publication may be reproduced or transmitted in any form, by photocopy, microfilm,
xerography, or any other means, or incorporated into any information retrieval
system, electronic or mechanical, for any purpose, without the express permission of
Cisco Systems, Inc.

iii
Contents
For Your Safety......................................................................................................................... 3
Notices....................................................................................................................................... 4
Important Safety Instructions.............................................................................................. vii
Laser Safety............................................................................................................................xiii
Laser Warning Labels............................................................................................................xv
General Information 1
Equipment Description ........................................................................................................... 2
Theory of Operation 15
System Diagrams ................................................................................................................... 17
Forward Path .......................................................................................................................... 21
Reverse Path ........................................................................................................................... 22
Power Distribution ................................................................................................................ 23
RF Amplifier Module ............................................................................................................24
Forward Configuration Module .......................................................................................... 29
Reverse Configuration Module............................................................................................ 34
Optical Interface Board (OIB)............................................................................................... 38
Optical Receiver Module ...................................................................................................... 39
Optical Analog Transmitter Modules ................................................................................. 43
Optical Amplifier (EDFA) Modules .................................................................................... 45
Optical Switch Module.......................................................................................................... 52
Local Control Module ........................................................................................................... 58
Power Supply Module .......................................................................................................... 61
Installation 65
Tools and Test Equipment.................................................................................................... 66
Node Housing Ports .............................................................................................................. 68
Strand Mounting the Node................................................................................................... 69
Pedestal or Wall Mounting the Node ................................................................................. 72
Fiber Optic Cable Installation ..............................................................................................74
RF Cable Installation .............................................................................................................82
Applying Power to the Node ............................................................................................... 85
Setup and Operation 89
Tools and Test Equipment.................................................................................................... 90
System Diagrams ................................................................................................................... 91
Forward Path Setup Procedure............................................................................................97

Contents
iv
Reverse Path Setup Procedure ........................................................................................... 101
Reconfiguring Forward Signal Routing............................................................................ 103
Reconfiguring Reverse Signal Routing............................................................................. 113
Maintenance 121
Opening and Closing the Housing....................................................................................122
Preventative Maintenance .................................................................................................. 124
Removing and Replacing Modules ................................................................................... 127
Care and Cleaning of Optical Connectors........................................................................ 134
Troubleshooting 139
No RF Output at Receiver RF Test Point: Optical Power LED on Receiver Module is
off ........................................................................................................................................... 140
No RF Output: Fiber Optic Light Level is Good, Receiver Optical Power LED is on 142
Poor C/N Performance ....................................................................................................... 144
Poor Distortion Performance.............................................................................................. 146
Poor Frequency Response................................................................................................... 148
No RF Output from Reverse Receiver ..............................................................................150
Customer Support Information 151
Appendix A Technical Information 153
Linear Tilt Chart................................................................................................................... 154
Forward Equalizer Chart .................................................................................................... 156
Appendix B Enhanced Digital Return Multiplexing Applications 158
Enhanced Digital Return System Overview .................................................................... 159
Enhanced Digital Return (EDR) System Installation ...................................................... 177
Transmitter Module Setup Procedure .............................................................................. 186
Reverse Balancing the Node with EDR ............................................................................ 189
Troubleshooting ................................................................................................................... 192
Appendix C Expanded Fiber Tray 197
Expanded Fiber Tray Overview......................................................................................... 198
Expanded Fiber Tray Installation ...................................................................................... 200
Fiber Management System ................................................................................................. 203
Configuration Examples ..................................................................................................... 209

Contents
v
Glossary 213
Index 225

Important Safety Instructions
vii
Important Safety Instructions
Read and Retain Instructions
Carefully read all safety and operating instructions before operating this equipment,
and retain them for future reference.
Follow Instructions and Heed Warnings
Follow all operating and use instructions. Pay attention to all warnings and cautions
in the operating instructions, as well as those that are affixed to this equipment.
Terminology
The terms defined below are used in this document. The definitions given are based
on those found in safety standards.
Service Personnel - The term service personnel applies to trained and qualified
individuals who are allowed to install, replace, or service electrical equipment. The
service personnel are expected to use their experience and technical skills to avoid
possible injury to themselves and others due to hazards that exist in service and
restricted access areas.
User and Operator - The terms user and operator apply to persons other than service
personnel.
Ground(ing) and Earth(ing) - The terms ground(ing) and earth(ing) are synonymous.
This document uses ground(ing) for clarity, but it can be interpreted as having the
same meaning as earth(ing).
Electric Shock Hazard
This equipment meets applicable safety standards.
WARNING:
To reduce risk of electric shock, perform only the instructions that are
included in the operating instructions. Refer all servicing to qualified service
personnel only.
Electric shock can cause personal injury or even death. Avoid direct contact with
dangerous voltages at all times.
Know the following safety warnings and guidelines:
Only qualified service personnel are allowed to perform equipment installation

Important Safety Instructions
viii
or replacement.
Only qualified service personnel are allowed to remove chassis covers and access
any of the components inside the chassis.
Equipment Placement
WARNING:
Avoid personal injury and damage to this equipment. An unstable mounting
surface may cause this equipment to fall.
To protect against equipment damage or injury to personnel, comply with the
following:
Install this equipment in a restricted access location (access restricted to service
personnel).
Make sure the mounting surface or rack is stable and can support the size and
weight of this equipment.
Strand (Aerial) Installation
CAUTION:
Be aware of the size and weight of strand-mounted equipment during the
installation operation.
Ensure that the strand can safely support the equipment’s weight.
Pedestal, Service Closet, Equipment Room or Underground Vault
Installation
WARNING:
Avoid the possibility of personal injury. Ensure proper handling/lifting
techniques are employed when working in confined spaces with heavy
equipment.
Ensure this equipment is securely fastened to the mounting surface or rack
where necessary to protect against damage due to any disturbance and
subsequent fall.
Ensure the mounting surface or rack is appropriately anchored according to
manufacturer’s specifications.
Ensure the installation site meets the ventilation requirements given in the
equipment’s data sheet to avoid the possibility of equipment overheating.
Ensure the installation site and operating environment is compatible with the
equipment’s International Protection (IP) rating specified in the equipment’s data
sheet.

Important Safety Instructions
ix
Connection to Network Power Sources
Refer to this equipment’s specific installation instructions in this manual or in
companion manuals in this series for connection to network ferro-resonant AC
power sources.
AC Power Shunts
AC power shunts may be provided with this equipment.
Important: The power shunts (where provided) must be removed before installing
modules into a powered housing. With the shunts removed, power surge to the
components and RF-connectors is reduced.
CAUTION:
RF connectors and housing seizure assemblies can be damaged if shunts are
not removed from the equipment before installing or removing modules from
the housing.
Equipotential Bonding
If this equipment is equipped with an external chassis terminal marked with the IEC
60417-5020 chassis icon ( ), the installer should refer to CENELEC standard EN
50083-1 or IEC standard IEC 60728-11 for correct equipotential bonding connection
instructions.
General Servicing Precautions
WARNING:
Avoid electric shock! Opening or removing this equipment’s cover may
expose you to dangerous voltages.
CAUTION:
These servicing precautions are for the guidance of qualified service
personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you
are qualified to do so. Refer all servicing to qualified service personnel.
Be aware of the following general precautions and guidelines:
Servicing - Servicing is required when this equipment has been damaged in any
way, such as power supply cord or plug is damaged, liquid has been spilled or
objects have fallen into this equipment, this equipment has been exposed to rain
or moisture, does not operate normally, or has been dropped.

Important Safety Instructions
x
Wristwatch and Jewelry - For personal safety and to avoid damage of this
equipment during service and repair, do not wear electrically conducting objects
such as a wristwatch or jewelry.
Lightning - Do not work on this equipment, or connect or disconnect cables,
during periods of lightning.
Labels - Do not remove any warning labels. Replace damaged or illegible
warning labels with new ones.
Covers - Do not open the cover of this equipment and attempt service unless
instructed to do so in the instructions. Refer all servicing to qualified service
personnel only.
Moisture - Do not allow moisture to enter this equipment.
Cleaning - Use a damp cloth for cleaning.
Safety Checks - After service, assemble this equipment and perform safety
checks to ensure it is safe to use before putting it back into operation.
Electrostatic Discharge
Electrostatic discharge (ESD) results from the static electricity buildup on the human
body and other objects. This static discharge can degrade components and cause
failures.
Take the following precautions against electrostatic discharge:
Use an anti-static bench mat and a wrist strap or ankle strap designed to safely
ground ESD potentials through a resistive element.
Keep components in their anti-static packaging until installed.
Avoid touching electronic components when installing a module.
Batteries
This product may contain batteries. Special instructions apply regarding the safe use
and disposal of batteries:
Safety
Insert batteries correctly. There may be a risk of explosion if the batteries are
incorrectly inserted.
Do not attempt to recharge ‘disposable’ or ‘non-reusable’ batteries.
Please follow instructions provided for charging ‘rechargeable’ batteries.
Replace batteries with the same or equivalent type recommended by
manufacturer.

Important Safety Instructions
xi
Do not expose batteries to temperatures above 100°C (212°F).
Disposal
The batteries may contain substances that could be harmful to the environment
Recycle or dispose of batteries in accordance with the battery manufacturer’s
instructions and local/national disposal and recycling regulations.
The batteries may contain perchlorate, a known hazardous substance, so special
handling and disposal of this product might be necessary. For more information
about perchlorate and best management practices for perchlorate-containing
substance, see www.dtsc.ca.gov/hazardouswaste/perchlorate.
Modifications
This equipment has been designed and tested to comply with applicable safety, laser
safety, and EMC regulations, codes, and standards to ensure safe operation in its
intended environment. Refer to this equipment's data sheet for details about
regulatory compliance approvals.
Do not make modifications to this equipment. Any changes or modifications could
void the user’s authority to operate this equipment.
Modifications have the potential to degrade the level of protection built into this
equipment, putting people and property at risk of injury or damage. Those persons
making any modifications expose themselves to the penalties arising from proven
non-compliance with regulatory requirements and to civil litigation for
compensation in respect of consequential damages or injury.
Accessories
Use only attachments or accessories specified by the manufacturer.
Electromagnetic Compatibility Regulatory Requirements
This equipment meets applicable electromagnetic compatibility (EMC) regulatory
requirements. Refer to this equipment's data sheet for details about regulatory
compliance approvals. EMC performance is dependent upon the use of correctly
shielded cables of good quality for all external connections, except the power source,
when installing this equipment.
Ensure compliance with cable/connector specifications and associated
installation instructions where given elsewhere in this manual.

Important Safety Instructions
xii
EMC Compliance Statements
Where this equipment is subject to USA FCC and/or Industry Canada rules, the
following statements apply:
FCC Statement for Class A Equipment
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when this equipment is
operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case users will be required to
correct the interference at their own expense.
Industry Canada - Industrie Canadiene Statement
This apparatus complies with Canadian ICES-003.
Cet appareil est confome àla norme NMB-003 du Canada.
CENELEC/CISPR Statement with Respect to Class A Information Technology Equipment
This is a Class A equipment. In a domestic environment this equipment may cause
radio interference in which case the user may be required to take adequate
measures.

Laser Safety
xiii
Laser Safety
Introduction
This equipment contains an infrared laser that transmits intensity-modulated light
and emits invisible radiation.
Warning: Radiation
WARNING:
Avoid personal injury! Use of controls, adjustments, or procedures other
than those specified herein may result in hazardous radiation exposure.
Avoid personal injury! The laser light source on this equipment (if a
transmitter) or the fiber cables connected to this equipment emit invisible
laser radiation. Avoid direct exposure to the laser light source.
Avoid personal injury! Viewing the laser output (if a transmitter) or fiber
cable with optical instruments (such as eye loupes, magnifiers, or
microscopes) may pose an eye hazard.
Do not apply power to this equipment if the fiber is unmated or unterminated.
Do not stare into an unmated fiber or at any mirror-like surface that could reflect
light emitted from an unterminated fiber.
Do not view an activated fiber with optical instruments (e.g., eye loupes,
magnifiers, microscopes).
Use safety-approved optical fiber cable to maintain compliance with applicable
laser safety requirements.
Warning: Fiber Optic Cables
WARNING:
Avoid personal injury! Qualified service personnel may only perform the
procedures in this manual. Wear safety glasses and use extreme caution when
handling fiber optic cables, particularly during splicing or terminating
operations. The thin glass fiber core at the center of the cable is fragile when
exposed by the removal of cladding and buffer material. It easily fragments
into glass splinters. Using tweezers, place splinters immediately in a sealed
waste container and dispose of them safely in accordance with local
regulations.

Laser Safety
xiv
Safe Operation for Software Controlling Optical Transmission
Equipment
If this manual discusses software, the software described is used to monitor and/or
control ours and other vendors’ electrical and optical equipment designed to
transmit video, voice, or data signals. Certain safety precautions must be observed
when operating equipment of this nature.
For equipment specific safety requirements, refer to the appropriate section of the
equipment documentation.
For safe operation of this software, refer to the following warnings.
WARNING:
Ensure that all optical connections are complete or terminated before
using this equipment to remotely control a laser device. An optical or laser
device can pose a hazard to remotely located personnel when operated
without their knowledge.
Allow only personnel trained in laser safety to operate this software.
Otherwise, injuries to personnel may occur.
Restrict access of this software to authorized personnel only.
Install this software in equipment that is located in a restricted access area.

Laser Warning Labels
xv
Laser Warning Labels
Maximum Laser Power
The maximum laser power that can be expected from the EDFA optical amplifier for
various amplifier configurations is defined in the following table.
Output
Power
Maximum
Output
CDRH
Classification
IEC 60825-1
Classification
IEC 60825-2
Hazard Level
17 dBm
17 dBm
1
1M
1M
20 dBm
20 dBm
1
1M
1M
22 dBm
22 dBm
1
1M
3B
Warning Labels
One or more of the labels shown below are located on this product.

Laser Warning Labels
xvi
Location of Labels on Equipment
The following illustrations display the location of warning labels on this equipment.

Laser Warning Labels
xvii