HLT 7xxxRMAXLink™ Transmitter

Product Manual

Manual Part No.: 700-0051979

Rev BApril 2005

HLT 7xxxR MAXLink Transmitter Product Manual

Copyright © 2005 Harmonic Inc.

Copyright 2005 Harmonic Inc.

Harmonic continues to improve and enhance all product designs. Specifications are subject to change without notice. Harmonic and logo design,eXchange, MAXLink, METROLink, NETWatch, PWRBlazer, TRANsend, and “Redefining the Network” are trademarks of Harmonic Inc. YAGLinkand PWRLink are registered trademarks of Harmonic Inc. All other names are trademarks or registered trademarks of their respective owners.

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) i

Table of Contents

Chapter 1 Overview1.1 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Chapter 2 Front Panel Interface2.1 Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1 Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.1.2 Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.1.3 Navigation Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.4 Numeric Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2 The Menu System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.2.1 HLT Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.2.2 HLT Adjustment Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.2.3 HLT Adjustment Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.2.4 HLT Alarms Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Chapter 3 Installing the HLT 7xxxR Transmitter3.1 Receiving and Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.2 Tools and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.3 Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.4 Rear Panel Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33.5 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.6 Mounting the HLT 7xxxR in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53.7 Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.7.1 Connecting AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.7.2 Connecting DC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.8 Connecting the RF Input Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.9 Connecting the Optical Output Fiber Cables . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.10 Setting Gain Control and Adjusting the RF Pad . . . . . . . . . . . . . . . . . . . . . . 3-8

3.10.1 Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.10.2 Factory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.10.3 The RF Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.11 Setting Single/Dual Fiber Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.12 Optimizing Stimulated Brillouin Scattering (SBS) Suppression . . . . . . . . 3-10

3.12.1 Optimizing SBS in Dual-Tone Mode . . . . . . . . . . . . . . . . . . . . . . . . 3-103.12.2 Optimizing SBS in Single-Tone Mode . . . . . . . . . . . . . . . . . . . . . . . 3-10

3.13 Connecting the Alarm Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113.14 Connecting the TTL Alarm Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.15 Connecting the Ethernet Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.16 Connecting to the Pilot Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.17 Turning Off the Pilot Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-133.18 Assigning IP Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-133.19 Changing Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-143.20 Checking the LEDs for Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Table of Contents

ii Copyright © 2005 Harmonic Inc.

Chapter 4 Web Interface4.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.2 HTTP Access Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.3 Areas and Features of the Web Interface —Quick Reference 4-34.4 Accessing and Using the Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44.5 Adjusting the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Chapter 5 Connecting the HLT 7xxxR to an NMS

Chapter 6 Maintenance and Troubleshooting6.1 Cleaning Fiber Optic Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors . . . . . . . . 6-26.1.2 Cleaning MAXLink Transmitter Optical Connectors . . . . . . . . . . . 6-2

6.2 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26.3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46.4 In Case of Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76.5 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76.6 Warranty Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76.7 Limitations of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-86.8 Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Appendix A Technical SpecificationsA.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1A.2 Optical Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1A.3 RF Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2A.4 User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2A.5 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3A.6 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3A.7 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3A.8 Laser Radiation Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3A.9 Agency Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4A.10 Management Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Appendix B Harmonic Inc. – Offices

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 1–1

1Overview

1.1 About This ManualThis instruction manual is a guide to installing and operating the HLT 7xxxR MAXLink™ Transmitter. Please read the entire manual before beginning installation.

• Chapter 1 gives general information about the MAXLink system.• Chapter 2 describes the front panel interface.• Chapter 3 describes the installation procedures.• Chapter 4 describes the web interface.• Chapter 5 tells you how to connect to a network management system.• Chapter 6 describes maintenance and what to do in the event of problems.• Appendix A provides complete technical specifications.• Appendix B provides a list of Harmonic’s offices around the world.

Overview

1–2 Copyright © 2005 Harmonic Inc.

1.2 DescriptionThe HLT 7xxxR MAXLink Transmitter is a stand-alone, one rack-unit module for use in 1550 nm long-haul and fiber-deep architectures. The HLT 7xxxR is part of Harmonic’s MAXLink™ product line for 1550 nm broadcast applications.

The HLT 7xxxR transmitter employs Harmonic’s patented complementary dual optical outputs, allowing for redundancy and doubling the number of available links per transmitter. The externally modulated transmitter uses broadband electronic linearization, coupled with optical amplifiers and low fiber loss at 1550 nm. The HLT 7xxxR allows you to extend the reach of your systems while achieving excellent signal quality.

Key features of the HLT 7xxxR transmitter include:

• Dual optical outputs allowing for redundancy• Compact single rack-unit package• Fully manageable via front panel controls, web interface, or SNMP• Advanced broadband electronic linearization• Low fiber loss at 1550 nm, allowing a fiber span in excess of 120 km while

achieving excellent signal quality• Externally modulated• High modulation index for better performance and longer reach• An internally generated 39 MHz pilot tone for use with the Harmonic

HLE MAXLink Extender

Figure 1-1 shows the HLT 7xxxR. Figure 1-2 and Figure 1-3 on page 1-3 are functional diagrams of the HLT 7x06R and HLT 7x16R.

Figure 1-1. HLT 7xxxR MAXLink Transmitter

Applications

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 1–3

Figure 1-2. HLT 7x06R block diagram

Figure 1-3. HLT 7x16R block diagram

1.3 ApplicationsThe HLT 7xxxR transmitter is part of Harmonic’s MAXLink product line. MAXLink products are designed to meet the economic and technical requirements of broadband service providers.

The HLT 7xxxR transmitter is designed for supertrunking or distribution applications where it is immediately followed by an optical amplifier. In supertrunking applications, an important component of the MAXLink system is the MAXLink Extender (HLE). The HLE enables a push-pull transmission architecture over two fibers, resulting in a CNR improvement of at least 3 dB and a CSO improvement of at least 6 dB (with respect to single-fiber performance).

Overview

1–4 Copyright © 2005 Harmonic Inc.

Typical applications of the HLT 7xxxR include:

• Medium- and long-haul applications beyond the reach of 1310 nm transmitters

• Fiber-dense architectures• Redundant rings and broadcast layer transmissions• Hub interconnects

Figure 1-4 shows typical deployments of the HLT 7xxxR.

Figure 1-4. Typical applications of the HLT 7xxxR transmitter

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 2–1

2Front Panel Interface

This chapter introduces the HLT 7xxxR front panel interface. You can view and adjust settings during installation from the front panel interface as described in Chapter 3, Installing the HLT 7xxxR Transmitter. You can also use the front panel interface to monitor and control the operation of the HLT 7xxxR. The front panel gives you access to all the adjustments and status information for the HLT 7xxxR via a simple menu system.

Harmonic MAXLink products feature an improved front panel interface that allows you to:

• Enter numeric variables directly• Scroll and toggle variables• Perform critical functions with a single keystroke• View alarm and status information

This chapter describes:

• Front panel features• The menu system

2.1 Front Panel FeaturesFigure 2-1 shows the HLT 7xxxR front panel.

Figure 2-1. HLT 7xxxR front panel

Keys2 x 20 Character Display

LEDs

RF Monitor

Front Panel Interface

2–2 Copyright © 2005 Harmonic Inc.

Figure 2-2 shows the front panel keys and LEDs.

Figure 2-2. HLT 7xxxR front panel detail

2.1.1 Front Panel LEDs

There are four LEDS on the front panel:

• Status• Power• Laser Off• Locked

The Status LED indicates the alarm state of the HLT 7xxxR. Solid green indicates the unit is operating normally; red indicates an active alarm.

When the Power LED is green, the HLT 7xxxR is turned on.

The Laser Off LED is amber when the lasers have been turned off manually via the rear panel switch.

The Locked LED is amber when the front panel interface is locked.

2.1.2 Function Keys

The function keys provide a one-step action for:

• Recalling factory settings.Press the RCL key to reset the HLT 7xxxR transmitter to factory default settings.

• Entering the Adjustment menu.Press ADJ to go directly to the HLT Adjustment menu.

• Entering the Status menu.Press STAT to go directly to the HLT Status menu.

• Entering the Alarm menu.Press ALM to go directly to the HLT Alarms menu.

• Locking the front panel.Press LOCK to deactivate the front panel keypad. Press LOCK again to activate the keypad. The Locked LED is amber when the front panel is locked.

The Menu System

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 2–3

There are also two keys used to assist in menu navigation:

• ESC

Press ESC to return to the previous menu level.• NUM

Press NUM to activate and enter variables from the numeric keypad.

2.1.3 Navigation Keys

The navigation keys allow you to move through the menu system and select variables. The up and down arrow keys move you through the menus. The left and right arrow keys allow you to scroll through adjustment options. The display shows left and right arrow symbols when you can scroll through values for the current menu. The display shows the pound sign (#) when you have pressed NUM, or when you must enter a value from the keypad (such as the IP address).

The ENT key selects menus and saves settings you changed.

2.1.4 Numeric Keypad

The numeric keypad allows you to enter parameters. The display shows the pound sign (#) when the front panel interface is in numeric entry mode. Some values can only be entered with the numeric keypad, in which case it is unnecessary to press NUM.

2.2 The Menu SystemThe menu system has three high-level choices:

• HLT Status• HLT Adjustment• HLT Alarms

The status and alarm menus provide read-only information. All adjustments to the HLT 7xxxR are made through the HLT Adjustment menu.

Figure 2-3 shows the first menu level.

Figure 2-3. HLT 7xxxR first menu level

Front Panel Interface

2–4 Copyright © 2005 Harmonic Inc.

2.2.1 HLT Status Menu

The HLT Status menu provides you with basic information on the HLT 7xxxR. Figure 2-4 shows the information presented in the HLT Status menu.

Figure 2-4. HLT Status menu

The Menu System

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 2–5

2.2.2 HLT Adjustment Menu

You use the HLT Adjustment menu to set up and adjust the HLT 7xxxR. Figure 2-5 shows the HLT Adjustment menu.

Figure 2-5. HLT Adjustment menu

Front Panel Interface

2–6 Copyright © 2005 Harmonic Inc.

2.2.3 HLT Adjustment Options

Table 2-1 lists and describes the HLT 7xxxR transmitter adjustment options.

Table 2-1: HLT 7xxxR Adjustment Options

Option Description

RF System

RF Gain Control Mode You can select manual gain control (MGC) or automatic gain control (AGC). For more information, see 3.10 Setting Gain Control and Adjusting the RF Pad on page 3-8.

RF Attenuation Pad If you are setting the gain manually, you enter the RF pad at this menu. For more information, see 3.10 Setting Gain Control and Adjusting the RF Pad on page 3-8.

39 MHz (HLE Sync) Switch

You have the option of turning off the 39 MHz pilot tone. For more information, see 3.17 Turning Off the Pilot Tone on page 3-13.

Single/Dual Fiber Set whether you are using the HLT 7xxxR in single or dual fiber mode. For more information, see 3.11 Setting Single/Dual Fiber Mode on page 3-9.

SBS System

Single/Dual Tone Mode

Select dual-tone mode for links shorter than about 85 km. Dual-tone operation allows maximum launch power (SBS suppression) of 17 dBm.Select single-tone mode for links longer than about 85 km. Single-tone operation eliminates certain fiber effects that degrade high-frequency performance over long fiber distances. In this mode, maximum launch power (SBS suppression) is 14 dBm.

SBS System Single Tone Mode

Mod Attenuation Cmd Adjusts the power of the SBS tone on the modulator.

Distance Factor Coarse For long links, Harmonic recommends single tone mode. The frequency of the tone can be adjusted to optimize CSO at the end of the link. Distance Factor Coarse contains some preset distances for which the frequency is optimized. Distance Factor Coarse must be used in conjunction with Mod Attenuation Cmd.

Distance Factor Fine For long links, Harmonic recommends single tone mode. The frequency of the tone can be adjusted to optimize CSO at the end of the link. Distance Factor Fine allows direct control of the tone frequency.

SBS System Dual Tone Mode

Mod Attenuation Cmd Adjusts the power of the SBS tone on the modulator.

DFB Attenuation Cmd Adjusts the power of the SBS tone on the laser.

The Menu System

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 2–7

2.2.4 HLT Alarms Menu

The front panel Status LED indicates that the HLT 7xxxR has active alarms. You can check the alarms through the HLT Alarms menu. Figure 2-6 shows all the possible alarms; however, only the active alarms are displayed. For detailed information on the alarms, see 6.2 Alarms on page 6-2.

Figure 2-6. HLT Alarms menu

NOTE: EDFA alarms are for model HLT 7x16R only.

Unit Address Adjust

DHCP Enable Enable if a DHCP server automatically assigns the IP address, or disable to enter the IP address manually. For more information, see 3.18 Assigning IP Addresses on page 3-13.

Adjust IP Address Enter the IP address of the HLT 7xxxR transmitter.See 3.18 Assigning IP Addresses on page 3-13.

Adjust Subnet Mask Enter a subnet mask.

Adjust Default Gateway

Enter a default gateway.

Table 2-1: HLT 7xxxR Adjustment Options

Option Description

Front Panel Interface

2–8 Copyright © 2005 Harmonic Inc.

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–1

3Installing the HLT 7xxxR Transmitter

This chapter provides information on installing and setting up the HLT 7xxxR MAXLink Transmitter. Please read all the instructions before beginning installation.

This chapter describes:

• How to receive and inspect the HLT 7xxxR• Tools and accessories• Precautions• How to mount and power the unit• Cable requirements and connections• How to set gain control and adjust the RF pad• How to set single/dual fiber mode and optimize SBS suppression• How to turn off the pilot tone• How to assign IP addresses and change passwords• How to check the LEDs for normal operation

Installing the HLT 7xxxR Transmitter

3–2 Copyright © 2005 Harmonic Inc.

3.1 Receiving and InspectingAs you unpack your unit, inspect the shipping container and equipment for damage. Save the shipping material for future use. If the container or the equipment is damaged, notify both the freight carrier and Harmonic. See Appendix B, Harmonic Inc. – Offices, for contact information.

CAUTION: To protect yourself from potential injury and to protect the equipment from further damage, do not perform any operational tests if the equipment appears to be damaged.

3.2 Tools and AccessoriesThe following tools and accessories are provided with the HLT 7xxxR:

• 4 supporting back rails (2 long and 2 short)• 2 DC power terminal blocks (DC power model only)• 1 AC power cord (AC power model only)• Accessory kit

The following tools are necessary for installation and are not included with the HLT 7xxxR:

• Phillips screwdriver• Flat-bladed screwdriver

3.3 Cable RequirementsTo install the HLT 7xxxR, the following cables may be needed:

• (DC power model only) One or two DC power cables, each with two 12 to 18 gauge wires, to connect one or two DC power sources.

• 75 Ohm coaxial cables for interconnection with F-type connectors. The acceptable center conducting pin size is 0.022 inch to 0.042 inch in diameter.

• 18 to 12 gauge wire for connecting relay alarms or redundant switching with NAB3800/3801 applications.

• 1 RJ-11 cable, to connect to a TTL alarm device.• 1 Category 5 Ethernet cable, to connect to a TCP/IP network.

Rear Panel Diagrams

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–3

3.4 Rear Panel DiagramsFigure 3-1 shows the location of the ports on the rear panel. Figure 3-2 shows the rear panel with the fiber tray open.

Figure 3-1. HLT 7xxxR rear panel features

Figure 3-2. HLT 7xxxR rear panel with fiber tray open

Laser Switch

TTL Alarm Port

Alarm Relay

Fiber Tray

AC Power Ground Contact

Pilot Port RF Input PortLocking Screw

Ethernet Port

Laser On LED

Installing the HLT 7xxxR Transmitter

3–4 Copyright © 2005 Harmonic Inc.

3.5 PrecautionsESD ALERT: Follow strict Electrostatic Discharge (ESD) precautions when

handling or working on Harmonic equipment and related components.

Operating the unit in an equipment rack, take the following precautions:

• Make sure the ambient temperature around the unit (which may be higher than the room temperature) is within the limit specified for the unit.

• Make sure there is sufficient airflow around the unit.• Make sure electrical circuits are not overloaded. Consider the nameplate

rating of all the connected equipment, and make sure you have over-current protection.

• Make sure the equipment is properly grounded.• Make sure no objects are placed on top of the unit.

WARNING: To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable.

All of Harmonic’s MAXLink transmitters use external modulation. External modulators display long-term problems if driven by very high RF levels. The problems can only be reversed by allowing the modulator to relax unpowered for five days.

CAUTION: Do not overdrive the RF input level to any MAXLink transmitter. If you do overdrive the input, allow the transmitter to sit unpowered for five days before use.

The following guidelines are provided to ensure your safety:

• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

ATTENTION: Pour éviter toute blessure corporelle pendant les opérations de montage ou de réparation de cette unité en casier, il convient de prendre des précautions spéciales afin de maintenir la stabilité du système.

Les directives ci-dessous sont destinées à assurer la protection du personnel:

• Si cette unité constitue la seule unité montée en casier, elle doit être placée dans le bas.

• Si cette unité est montée dans un casier partiellement rempli, charger le casier de bas en haut en plaçant l’élément le plus lourd dans le bas.

• Si le casier est équipé de dispositifs stabilisateurs, installer les stabilisateurs avant de monter ou de réparer l’unité en casier.

Mounting the HLT 7xxxR in a Rack

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–5

WARNUNG: Zur Vermeidung von Körperverletzung beim Anbringen oder Warten dieser Einheit in einem Gestell müssen Sie besondere Vorkehrungen treffen, um sicherzustellen, daß das System stabil bleibt.

Die folgenden Richtlinien sollen zur Gewährleistung Ihrer Sicherheit dienen:

• Wenn diese Einheit die einzige im Gestell ist, sollte sie unten im Gestell angebracht werden.

• Bei Anbringung dieser Einheit in einem zum Teil gefüllten Gestell ist das Gestell von unten nach oben zu laden, wobei das schwerste Bauteil unten im Gestell anzubringen ist.

• Wird das Gestell mit Stabilisierungszubehör geliefert, sind zuerst die Stabilisatoren zu installieren, bevor Sie die Einheit im Gestell anbringen oder sie warten.

3.6 Mounting the HLT 7xxxR in a RackThe HLT 7xxxR mounts in a standard 19-inch equipment rack.

To mount the HLT 7xxxR in a rack:

1. Place the unit in a standard 19-inch equipment rack.2. Use four mounting screws to attach the mounting brackets on the

HLT 7xxxR front panel to the rack. 3. Attach the two supporting back rails, using four mounting screws. You

can use either the long or short supporting rails, depending on your rack type.

NOTE: Never mount the HLT 7xxxR with the only the front mounting brackets. To prevent damage to the transmitter, always install the supporting rails.

Installing the HLT 7xxxR Transmitter

3–6 Copyright © 2005 Harmonic Inc.

3.7 Connecting PowerThe HLT 7xxxR is available in an AC power model and a DC power model. After mounting the HLT 7xxxR in a rack, follow the power connection procedure below for the model that you are installing.

3.7.1 Connecting AC Power

The AC-powered HLT 7xxxR has one 110/220 VAC (50/60 Hz) input connector that requires input voltage from 100 to 240 VAC, at 50 to 60 Hz single phase. Selection switching over this range is automatic. The AC power plug is located on the rear panel.

To connect AC power:

1. Connect the ground contact to ground. This is important for your safety. The ground contact is located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

2. Connect the power cord to a 110 VAC or 220 VAC (50/60 Hz) electrical socket. (The AC-powered HLT 7xxxR features an auto-sensing power supply.)The HLT 7xxxR boots up. It takes about 30 seconds for all systems to operate.

CAUTION: To avoid personal injury and damage to the equipment, use a power outlet with a protective ground (third wire) contact.

3.7.2 Connecting DC Power

The DC-powered HLT 7xxxR has two –48 VDC input connectors that require input voltage from –36 to –72 VDC. The DC input connectors are located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

The two power plugs allow you to provide redundant (backup) power. If you provide redundant power, the HLT 7xxxR continues to operate when the primary power source fails. There is no difference between the two DC input connectors. Connect either one to the primary power source and the other to the (optional) backup power source.

To connect DC power:

1. Connect the ground contact to ground. This is important for your safety. The ground contact is located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

2. Attach a DC power terminal block to the rear panel of the HLT 7xxxR using a small flat-bladed screwdriver.

3. With the power source off, connect two 18 to 12 gauge power wires from the power source to the DC terminal block.

4. Turn on the power source. The HLT 7xxxR boots up. It takes about 90 seconds for all systems to operate.

5. If you are providing redundant power, repeat steps 2 and 3 to connect the backup power source to the second power terminal block.

Connecting the RF Input Cable

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–7

3.8 Connecting the RF Input CableThe HLT 7xxxR has one RF input port. The RF input port is a 75 Ohm F connector, located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

Connect the RF input cable to the RF input port. Use only an F-type connector with a center conductor size of 0.022 to 0.042 inches.

3.9 Connecting the Optical Output Fiber CablesThe HLT 7xxxR has two optical output connectors, which are located on the fiber tray, as shown in Figure 3-2 on page 3-3. The optical fibers are labeled 1 and 2.

DANGER: Invisible Laser Radiation. AVOID EXPOSURE TO BEAM. Never operate unit with a broken fiber.

To connect the optical output fiber cable(s) to the HLT 7xxxR:

1. Unscrew the locking screw on the fiber tray. The fiber tray and the locking screw are located on the rear panel of the HLT 7xxxR, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

2. Gently pull the handle to open the fiber tray and reveal the optical connector adapter(s) inside. You can rotate the fiber tray downward for easier access. Pressing on the fiber tray may cause damage.

3. Determine the connector type on the HLT 7xxxR. Models are available with either SC/APC, or E2000/APC connectors.

4. Verify that the type of connector on the fiber cable matches that of the HLT 7xxxR.

5. Verify that the fiber cable connector has been cleaned properly. If the fiber cable connector needs to be cleaned, follow the cleaning procedure outlined in Section 6.1.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors on page 6-2.

6. Verify that the HLT 7xxxR optical connector has not been exposed to any contamination. If you suspect that the connector may have been exposed to contamination (for example, by a dirty fiber cable connector), follow the cleaning procedure outlined in Section 6.1.2 Cleaning MAXLink Transmitter Optical Connectors on page 6-2.

NOTE: Any contamination of either the fiber cable or HLT 7xxxR receiver connector can significantly degrade optical link performance. This degradation will most likely manifest itself as poor carrier-to-noise (CNR) performance.

7. For SC-type optical connectors, note the key characteristics of the mating connectors and align them accordingly. Gently insert the fiber cable connector into that of the HLT 7xxxR until the connector clicks into place.HLT 7xxxR has two output connectors, labeled 1 and 2. Connect one or two output fibers, based on how you plan to use the transmitter.

Installing the HLT 7xxxR Transmitter

3–8 Copyright © 2005 Harmonic Inc.

8. Move the fiber(s) into the groove in the edge of the fiber tray, as shown in Figure 3-2 on page 3-3.

9. Close the fiber tray.10. Screw the locking screw to secure the fiber tray.

NOTE: The transmitter ships with the lasers turned off. The Laser Off switch on the rear panel is in the Off position.

3.10 Setting Gain Control and Adjusting the RF PadThe RF pad setting is critical to the transmitter’s performance. You need to adjust the RF pad or switch to automatic gain control mode.

Use the front panel interface to carry out these procedures:

• Set the gain control to manual gain control (MGC) or automatic gain control (AGC) mode

• Optionally recall the factory settings• If in MGC mode, adjust the RF pad

After you have connected the RF input and output cables, there are two options for how to proceed:

• If you do not know the correct RF input level, or are not sure how to set the gain control:- Switch to AGC mode, as described in Section 3.10.1- Recall factory settings, as described in Section 3.10.2

• If you know the proper RF level and you know how to properly adjust the RF pad:- You don’t need to recall factory settings- Stay in MGC mode- Adjust the RF pad, as described in Section 3.10.3- You can stay in MGC mode or switch to AGC mode

3.10.1 Gain Control

The transmitter operates in either automatic gain control (AGC) mode or manual gain control (MGC) mode.

In AGC mode, the transmitter maintains a constant value for the internal drive level to the modulator, despite variations in the input RF level. The AGC function operates by measuring the input RF level to the transmitter and continuously adjusting the RF pad to maintain constant drive level to the modulator.

In MGC mode, the transmitter’s internal RF pad is kept at a fixed value regardless of input RF level variation.

To change the gain control (MGC or AGC):

1. Press until HLT Adjustment appears on the display, then press [ENT] to enter the HLT Adjustment menu. RF System Adjust appears on the display.

Setting Single/Dual Fiber Mode

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–9

2. Press [ENT]. RF Gain Control Mode MGC appears on the display.

3. Press or to switch to AGC mode. RF Gain Control Mode AGC appears on the display.

4. Press [ENT] to save the mode setting.

3.10.2 Factory Settings

Prior to shipment, the Harmonic factory optimizes the performance of each HLT 7xxxR for 80 NTSC channel loading at an RF input level of 18 dBmV/channel. If you want to adjust the performance characteristics, you can adjust the RF level accordingly.

To recall factory settings:

• Press the RCL key on the front panel (see Figure 2-2 on page 2-2).

3.10.3 The RF Pad

When the transmitter is in MGC mode (the factory default gain control mode), you may adjust the RF pad setting. When the transmitter is in AGC mode, it automatically adjusts the RF pad.

To adjust the RF pad:

1. Press until HLT Adjustment appears on the display, then press [ENT] to enter the HLT Adjustment menu. RF System Adjust appears on the display.

2. Press [ENT]. RF Gain Control Mode MGC appears on the display.3. Press . The message appears RF Attenuation Pad xx.x dB, showing

the current RF pad setting.

4. Press or to decrease or increase the RF pad setting, then press [ENT].

3.11 Setting Single/Dual Fiber ModeAt the factory, the HLT 7xxxR is set for dual-fiber operation.

In dual-fiber mode, the two output ports are equivalent and have the same performance. In single-fiber mode, fiber output port 1 has optimized CSO performance over 50 km of fiber and fiber output port 2 does not have a CSO specification.

To switch to single fiber mode:

1. Press until HLT Adjustment appears on the display, then press [ENT] to enter the HLT Adjustment menu. RF System Adjust appears on the display.

2. Press [ENT]. RF Gain Control Mode MGC appears on the display.3. Press until the display reads Dual Fiber Mode.

4. Press or to change the setting. Single Fiber Mode appears on the display.

5. Press [ENT].

Installing the HLT 7xxxR Transmitter

3–10 Copyright © 2005 Harmonic Inc.

3.12 Optimizing Stimulated Brillouin Scattering (SBS) SuppressionHigh-performance optical transmission systems are affected by stimulated Brillouin scattering (SBS). When more than about 8 dBm of power is transmitted into an optical fiber, the signal reflects, causing performance to degrade. SBS suppression provides a solution to this inherent problem.

The HLT 7xxxR allows you to optimize SBS settings for each link, based on fiber distance.

For links shorter than about 85 km, select dual-tone mode. Dual-tone operation allows maximum launch power (SBS suppression) of 17 dBm.

For links longer than about 85 km, select single-tone mode. Single-tone operation eliminates certain fiber effects that degrade high-frequency performance over long fiber distances. In this mode, maximum launch power (SBS suppression) is 14 dBm.

Single-tone mode also allows improved control of CSO, which is a function of fiber length and SBS tone frequency. Several preset optimization points are stored in the transmitter for various fiber distances. When you select single-tone mode, you are prompted to choose one of these preset points. Choosing the point that is closest to the actual link distance is likely to yield the best CSO performance, although other preset points may be better in some cases.

3.12.1 Optimizing SBS in Dual-Tone Mode

There are three SBS tones and you can adjust each of them independently. These adjustments affect performance but are not critical to the operation of the transmitter.

To optimize SBS in dual-tone mode:

1. Press until HLT Adjustment appears on the display, then press [ENT] to enter the HLT Adjustment menu. RF System Adjust appears on the display.

2. Press until the display reads SBS System Adjust, then press [ENT]. Single/Dual Tone Mode appears on the display.

3. Change the tone mode setting to dual by pressing or , then press [ENT].

4. Press once to display Mod Attenuation Cmd xxx.

5. Press or (or [NUM] and number keys) to change the Mod Attenuation Cmd setting, then press [ENT] to display DFB Attenuation Cmd xxx.

6. Press or (or [NUM] and number keys) to change the DFB Attenuation Cmd setting, then press [ENT] to return to the HLT Adjustment menu.

3.12.2 Optimizing SBS in Single-Tone Mode

In single-tone mode, you can coarse-tune and fine-tune the SBS tones. You make these adjustments based on the actual performance of the system. These adjustments affect performance but are not critical to the operation of the

Connecting the Alarm Relay

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–11

transmitter. To optimize performance, one person adjusts the transmitter’s SBS settings while in communication with another person who monitors the performance at the receiver.

To optimize SBS in single-tone mode:

1. Press until HLT Adjustment appears on the display, then press [ENT] to enter the HLT Adjustment menu. RF System Adjust appears on the display.

2. Press until the display reads SBS System Adjust, then press [ENT]. Single/Dual Tone Mode appears on the display.

3. Change the tone mode setting to single by pressing or , then press [ENT].

4. Press once to display Mod Attenuation Cmd xxx.

5. Press or (or [NUM] and number keys) to change the Mod Attenuation Cmd setting, then press [ENT].

6. Press once to display Distance Factor Coarse = xx.

7. Press or (or [NUM] and number keys) to change the distance factor coarse setting, then press [ENT].

8. Press once to display Enter for Distance Factor Fine.9. Press [ENT] to display Distance Factor Fine = xxxx.

10. Press or (or [NUM] and number keys) until you are satisfied with the setting, then press [ENT] to return to the HLT Adjustment menu.

3.13 Connecting the Alarm RelayThe HLT 7xxxR has a 5-pin alarm relay that provides the transmitter with redundant switching capability. The alarm relay is located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

Table 3-1 shows the pin definitions.

When operating normally with no alarm present, Pin 2 and Pin 3 make electrical contact, while Pin 1 is left open. When an alarm occurs, electrical contact is made between Pin 1 and Pin 3, while Pin 2 is left open. This remains until the alarm condition is removed.

Table 3-1: Alarm Relay Pins

Pin Label Function

Pin 1 NO Normally open

Pin 2 NC Normally closed

Pin 3 COM Common

Pin 4 GND Ground

Pin 5 +24 +24 V source for A/B switch (100 mA)

Installing the HLT 7xxxR Transmitter

3–12 Copyright © 2005 Harmonic Inc.

3.14 Connecting the TTL Alarm CableThe TTL-compatible alarm port is an RJ-11 connector located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

You can use the TTL alarm port to connect the HLT 7xxxR to many other devices, in order to monitor alarms on the HLT 7xxxR.

Two pins are used for the alarm:

• Pin 3 is the ground.• Pin 4 is the TTL alarm output. When an alarm is present in the unit, the

level of the signal from Pin 4 goes high, sending a 5-volt signal. When there is no alarm from the HLT 7xxxR, the signal from Pin 4 stays low.

3.15 Connecting the Ethernet CableYou can connect the HLT 7xxxR to your TCP/IP network, so that you can monitor and control the transmitter remotely.

After you have completed the installation procedures described in this chapter, you can use a network management system (NMS) or a web browser to monitor and control the HLT 7xxxR.

To connect the Ethernet cable:

1. Connect an Ethernet cable between the transmitter’s RJ-45 Ethernet port and your TCP/IP network. The Ethernet port is located on the rear panel of the transmitter, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

2. Verify that the green Link LED is illuminated, which means there is a connection. The Link LED is located below the Ethernet port on the rear panel.

3.16 Connecting to the Pilot PortUse the pilot port if you use a previous generation NETWatch network monitoring system. The pilot port can accept a pilot tone centered at 10.7 MHz. The pilot port is located on the rear panel, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

Previous generation NETWatch systems require a 10.7 MHz FSK pilot tone, which you can inject into the transmitter using this port.

Turning Off the Pilot Tone

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–13

3.17 Turning Off the Pilot ToneThe HLT 7xxxR can send a 39 MHz pilot tone in the output signal. The HLT 7xxxR ships from the factory with the pilot tone turned on. The 39 MHz pilot tone must be turned on for all applications that use the HLE 3800P or HLE 3802P MAXLink Extender.

To turn off the 39 MHz pilot tone:

1. On the keypad on the front panel, press the key until HLT Adjustment appears on the display, then press [ENT] to view the HLT Adjustment menu. The message RF System Adjust appears.

2. Press [ENT] to enter the RF System Adjust menu.3. Press until the display reads 39 MHz (HLE Sync) Switch ON.

4. Press or to toggle the setting. The display reads 39 MHz (HLE Sync) Switch OFF.

5. To return to the main menu, press [ESC] twice.

3.18 Assigning IP AddressesYou must assign IP addresses to the HLT 7xxxR transmitter, so that NMSs and web browsers can communicate with it. Use the front panel to assign the IP address, subnet mask, and default gateway.

You can set the HLT 7xxxR’s IP address in one of two ways:

• Automatically from a DHCP server when the HLT 7xxxR is added to the network.

• Manually enter the IP address from the front panel interface.

If you choose to use DHCP, make sure that your server supports DHCP. If you are manually assigning the IP address, you can also set a subnet mask and gateway IP addresses.

NOTE: IP addresses are unique. If you do not know the IP addresses of the HLT 7xxxR, contact your system administrator.

To manually assign an IP address:

1. Press until the display reads HLT Adjustments, then press [ENT] to enter the HLT Adjustments menu.

2. Press until the display reads Unit Address Adjust, then press [ENT]. The display reads DHCP Enable Yes/No.

3. Press or to toggle the DHCP setting, then press [ENT]. If you enable DHCP, you are now finished assigning IP addresses. If you do not enable DHCP, the display reads Adjust IP Address: xxx.xxx.xxx.xxx #

4. Use the number keys to type the IP address of the HLT 7xxxR, then press [ENT].

5. Press once. The display reads Adjust Subnet Mask: xxx.xxx.xxx.xxx #

Installing the HLT 7xxxR Transmitter

3–14 Copyright © 2005 Harmonic Inc.

6. Use the number keys to type the subnet mask of the HLT 7xxxR, then press [ENT].

7. Press once. The display reads Adjust Default Gateway: xxx.xxx.xxx.xxx #

8. Use the number keys to type the default gateway of the HLT 7xxxR, then press [ENT].

3.19 Changing PasswordsPasswords are required to adjust the settings of the HLT 7xxxR via the web, or to access the HLT 7xxxR via Telnet. As a security measure, Harmonic recommends that you change both passwords from their default values. The HLT 7xxxR has a command-line interface that allows you to change the passwords.

Once the HLT 7xxxR is operating, the web interface provides a convenient means of managing it remotely. There are two levels of access to the HLT 7xxxR web interface:

• Status—for monitoring the HLT 7xxxR• Adjustments—for monitoring and adjusting the HLT 7xxxR

Table 3-2 shows the user name and default password required to access the HLT 7xxxR user interfaces.

The passwords can be changed. User names cannot be changed.

NOTE: User names and passwords are case sensitive.

For further details on the web interface, see Chapter 4, Web Interface.

To change the web-adjustments and Telnet-access passwords:

1. Using a computer that is connected to the same IP network as the HLT 7xxxR, start a Telnet program.

2. Using the Telnet program, enter the transmitter’s IP address to establish a remote connection to the HLT 7xxxR.

3. To log into the HLT 7xxxR, type the user name and password, then press Enter. The default user name is admin and the default password is password.

Table 3-2: HLT 7xxxR User Names and Passwords

Interface User Name Default Password

Telnet Command Line admin password

Web Status (not required) (not required)

Web Adjustments Config config

Checking the LEDs for Normal Operation

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 3–15

4. To change the Telnet-access password, type passwd -cc, then press Enter. Follow the on-screen instructions to enter the new password.If you are unsure what Telnet password to assign, contact your network administrator.

5. To change the web-adjustments password, type passwd -ch, then press Enter. Follow the on-screen instructions to enter the new password.If you are unsure what web password to assign, contact your network administrator.For further information about password command options, type help passwd.For further information about other CLI commands, type help.

6. When you are finished, log out of the command-line interface by typing exit and pressing Enter.

3.20 Checking the LEDs for Normal OperationOnce you finish installing and setting up the unit, verify that the Status, Power, and Laser Off LEDs on the front panel appear in these colors, from top to bottom:

LED Color Description

Status Green System operating normally without an alarm.

Power Green Power to the transmitter is on.

Laser Off Green Lasers are on.

Installing the HLT 7xxxR Transmitter

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HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 4–1

4Web Interface

After you have completed the procedures described in Chapter 3, Installing the HLT 7xxxR Transmitter, you can use a web browser or a network management system to monitor and control the HLT 7xxxR.

This chapter introduces the HLT 7xxxR web interface. Once the HLT 7xxxR is operating, the web interface provides a convenient means of managing it.

This chapter describes:

• Requirements• HTTP access control• How to access and use the web interface• How to change your access level and adjust the transmitter• Web interface tips

The HLT 7xxxR has an embedded HTTP server, which allows you to remotely view the status of alarms and settings, or make adjustments to the HLT 7xxxR. However, for security reasons, a password is required to change any settings. The settings you can change are described in 2.2.3 HLT Adjustment Options on page 2-6.

The following features are available through the web interface, but are not available through the front panel interface:

• Assigning a name, location, and contact• Viewing the hardware version of the HLT 7xxxR

The following features are available through the front panel interface, but are not available through the web interface:

• Assigning IP addresses to the transmitter• Locking and unlocking the keypad

Web Interface

4–2 Copyright © 2005 Harmonic Inc.

4.1 RequirementsYou can access the HLT 7xxxR web interface from any computer that is connected to the same IP network and has a web browser.

To use the web interface, the HLT 7xxxR must be properly installed, as described in Chapter 3, Installing the HLT 7xxxR Transmitter, and you need to know the transmitter’s IP address. Specifically, the HLT 7xxxR must be connected to your IP network as described in Section 3.15 Connecting the Ethernet Cable on page 3-12, and IP addresses must have been assigned to the HLT 7xxxR as described in Section 3.18 Assigning IP Addresses on page 3-13.

4.2 HTTP Access ControlThere are two levels of access to the HLT 7xxxR web interface:

• Status—for monitoring the transmitter (read-only access)• Adjustments—for monitoring and adjusting the transmitter

(read-write access)

To make adjustments, the user name and password are required.

Your company can provide different levels of access to different people based on their job function or other criteria. Some staff members can monitor the HLT 7xxxR, while others may adjust the settings.

To change access level, click the Change Access button near the top of the web interface. When prompted, enter the user name and password. Once verified, you are given the read-write capability to configure the unit. The user name and default password are given in Section 4.5 Adjusting the Transmitter on page 4-5.

NOTE: To maintain network security, Harmonic recommends that you change the password during HLT 7xxxR installation, as described in Section 3.19 Changing Passwords on page 3-14.

Areas and Features of the Web Interface — Quick Reference

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 4–3

4.3 Areas and Features of the Web Interface —Quick ReferenceThe web interface always includes device identity information at the top of your browser, and the Current Alarms list on the left, as shown in Figure 4-1 on page 4-4. To access the other areas of the web interface, click the tabs located at the top of the right frame.

Table 4-1 summarizes the features of the HLT 7xxxR web interface. The left column of the table shows the areas of the web interface. The right column tells you which functions you can carry out within each area.

Grayed-out values

In a text field or drop-down list, values that appear as gray text are read only and cannot be changed.

Apply button

After you change one or more parameters, you must click Apply to have the changes take effect. You can apply changes only within the same tab area.

Refresh button

Below the Current Alarms list, click Refresh to refresh the status of the alarms. Without pressing the button, the list automatically refreshes every 30 seconds.

Refresh Values button

Clicking Refresh Values refreshes the web page you are viewing. The new page shows the current settings.

Table 4-1: Features of the HLT 7xxxR Web Interface

Web Interface Area Location Enables You To...

Device Identity Top frame View device identity; change web access level

Current Alarms Left frame View current alarms (see 6.2 Alarms on page 6-2)

System Right frame View or change system information; restore factory settings

Transmitter Output Right frame View output power levels

RF Input Right frame View or change RF input settings

SBS Control Right frame View or change tone mode and SBS settings

Lasers Right frame View optical system status information; view or change DFB Attenuation Cmd

Web Interface

4–4 Copyright © 2005 Harmonic Inc.

4.4 Accessing and Using the Web InterfaceYou can access the web interface for the HLT 7xxxR from your browser.

To access the web interface:

1. Using a computer that is connected to the same TCP/IP network as the HLT 7xxxR, launch a web browser.

2. In the web browser’s Address (URL) field, type the IP address of the transmitter, then press Enter. Your browser connects to the transmitter, and the web interface appears, as shown in Figure 4-1.The top frame identifies the transmitter. The left frame shows all current alarms and refreshes every 30 seconds. The right frame shows current system configurations.

3. To view information about additional settings, click one of the blue tabs in the right frame: Transmitter Output, RF Input, SBC Control, or Lasers. The right frame changes.

Figure 4-1. Web interface and System tab (status mode)

Adjusting the Transmitter

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 4–5

4.5 Adjusting the TransmitterTo change the transmitter’s settings, you must enter the web interface, then change your access level.

To adjust the HLT 7xxxR:

1. Enter the web interface, as described in Section 4.4. The web interface appears, as shown in Figure 4-1 on page 4-4, and you are in status (read-only) mode.

2. Click the Change Access button in the top frame. The Change Access (log on) page appears, as shown in Figure 4-2.

Figure 4-2. Change Access (log on) page

3. Type the user name and password, then click Log On. The user name is Config. By default, the password is config, but it may have been changed during installation. You may need to check with your system administrator.The user name and password are case sensitive.

NOTE: To maintain network security, Harmonic recommends that you change the password immediately after logging in for the first time. Contact Harmonic customer support for more information.

The System page appears, as shown in Figure 4-3 on page 4-6, and you are now in adjustments (read-write) mode.

Web Interface

4–6 Copyright © 2005 Harmonic Inc.

Figure 4-3. Web interface and System tab (adjustments mode)

4. You can edit many of the settings by typing the new values or using the drop-down menus (where present). After changing values (as many values as you want), click Apply for your changes to take effect. The Confirmation page appears, as shown in Figure 4-4.If you want to clear your changes without saving them, you can revert to the previous settings by clicking Refresh Values.

Figure 4-4. Confirmation page

5. To view or change additional settings, click one of the blue tabs in the right frame: Transmitter Output, RF Input, SBC Control, or Lasers.The right frame changes, as shown in Figure 4-5 on page 4-7 through Figure 4-9 on page 4-8.For more information about the settings you can change, see Section 2.2.3 HLT Adjustment Options on page 2-6.

Adjusting the Transmitter

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 4–7

Figure 4-5. Transmitter Output tab (adjustments mode)

Figure 4-6. RF Input tab (adjustments mode)

Figure 4-7. SBS Control tab with dual tone option (adjustments mode)

Figure 4-8. SBS Control tab with single tone option (adjustments mode)

Web Interface

4–8 Copyright © 2005 Harmonic Inc.

Figure 4-9. Lasers tab (adjustments mode)

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 5–1

5Connecting the HLT 7xxxR to an NMS

Once the HLT 7xxxR is operating, you can use a network management system (NMS) to monitor and control it. This chapter tells you how to connect the HLT 7xxxR to an NMS.

For instructions on installing, configuring, and operating an NMS, please refer to the documentation for the NMS.

MAXLink transmitters and receivers have an embedded SNMP agent that enables communication between the HLT 7xxxR and any devices that support SNMP versions 1, 2, or 3.

To connect the HLT 7xxxR to an NMS:

1. Complete the installation procedures described in Chapter 3, Installing the HLT 7xxxR Transmitter. To connect to an NMS, the HLT 7xxxR must be connected to your IP network as described in Section 3.15 Connecting the Ethernet Cable on page 3-12, and IP addresses must have been assigned to to the HLT 7xxxR as described in Section 3.18 Assigning IP Addresses on page 3-13.

2. Determine the IP address of the HLT 7xxxR.3. Determine your default access rights for different versions of the SNMP

protocol. The default access rights for SNMP versions 1, 2, and 3 are shown in Table 5-1 and Table 5-2.

4. Locate and compile the Harmonic MIB (management information base) files for the HLT 7xxxR. Feed the MIBs for the HLT 7xxxR into your NMS’s MIB compiler.

5. Add the HLT 7xxxR as an SNMP trap target in your NMS, so that the NMS receives SNMP notifications from the HLT 7xxxR.

Connecting the HLT 7xxxR to an NMS

5–2 Copyright © 2005 Harmonic Inc.

Table 5-1: Default Access Rights for SNMPv1 and SNMPv2

Community String(s)

Rights To/From MIBs/Objects

public, admin Will not read,Will not write

snmpFrameworkMIBObjectssnmpProxyMIBsnmpUsmMIBsnmpVacmMIBsnmpCommunityMIBenterprise factory MIB

public Will not write Any object

admin Will write Any enterprise user MIB object with the maximum access read-write

Table 5-2: Default Access Rights for SNMPv31

1. Password-to-key conversions are computed according to RFC 2574, A.2.1 and A.2.2.

User Authentication& Privacy Rights To/From MIBs/Objects

public None Will not read,Will not write

snmpFrameworkMIBObjectssnmpProxyMIBsnmpUsmMIBsnmpVacmMIBsnmpCommunityMIBenterprise factory MIB

public None Will not write Any object

admin MD-5 & DES with pass phrase config

Maximum access

Any supported object excluding any enterprise factory MIB

intialmd5 MD-5 & DES with pass phrase intialmd5

(Provided only as a template so that you can create your own users)

intialsha SHA-1 & DES with pass phrase intialsha

(Provided only as a template so that you can create your own users)

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 6–1

6Maintenance and Troubleshooting

This chapter describes:

• How to clean fiber optic connectors• Alarms for the HLT 7xxxR• How to troubleshoot the HLT 7xxxR• How to return the unit for service• Manufacturer disclaimer• Warranty summary• Limitations of the warranty• Exclusive legal remedies

6.1 Cleaning Fiber Optic ConnectorsDANGER: The fiber cable carries invisible laser radiation. AVOID

EXPOSURE TO THE BEAM. Never operate a unit that has a broken fiber or a disconnected fiber connector.

Dirty optical connectors are the leading source of poor performance in a broadband optical fiber network. Dirty optical connectors lead to optical signal loss and reflections, which in turn can seriously degrade carrier-to-noise (CNR) performance and, in some cases, distortion performance.

Harmonic recommends that you clean all mating fiber connectors, before connecting them to an optical transmitter.

In addition, if you suspect that the optical connector of an HLT 7xxxR may have been exposed to contamination (by a dirty fiber cable connector, for example), you should properly clean the HLT 7xxxR optical connector before connecting the optical fiber.

CAUTION: Improper cleaning of an optical connector can do more harm than good. Never spray a clean-air product onto the surface of an optical connector. Spraying air onto an optical connector can cause condensation on the connector surface, leaving water spots and trapping dust. Failing to wipe a connector on dry lens paper immediately after wiping on paper wet with isopropyl alcohol can also lead to condensation on the connector. Using low-grade cleaning paper or other cloth to wipe an optical connector can leave microscopic fibers on the optical connector surface.

Maintenance and Troubleshooting

6–2 Copyright © 2005 Harmonic Inc.

6.1.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors

To clean optical connectors, Harmonic recommends using a fiber optic connector cleaning cartridge (such as NTT Cletop). If a cleaning cartridge is not available, follow these steps.

To clean the optical connector of a patch cord or pigtail:

1. Fold a piece of unused dry lens cleaning paper twice, for a four-ply thickness.

2. Use a drop of high-grade isopropyl alcohol to wet part of the paper.3. Lay the connector on the lens cleaning paper with the tip touching the

paper.4. In one continuous motion, pull the connector from the wet part of the

paper to the dry part.

6.1.2 Cleaning MAXLink Transmitter Optical Connectors

To clean the optical connector of a MAXLink transmitter:

1. Unscrew the locking screw on the fiber tray.The fiber tray and locking screw are located on the rear panel of the transmitter, as shown in Section 3.4 Rear Panel Diagrams on page 3-3.

2. Pull the handle to open the fiber tray.3. Release the internal optical connector from the internal bulkhead adaptor.

The end of the internal fiber connector can now be cleaned.

CAUTION: When the fiber connector is extended from the unit, take care to prevent twisting or rotating the connector in order to prevent possible fiber damage.

4. Fold a piece of unused dry lens cleaning paper twice, for a four-ply thickness.

5. Use a drop of high-grade isopropyl alcohol to wet part of the paper.6. Lay the connector on the lens cleaning paper with the tip touching the

paper.7. In one continuous motion, pull the connector from the wet part of the

paper to the dry part.8. Once the cleaning is complete, re-insert the internal fiber connector into

the bulkhead adaptor and press the two parts together carefully.9. Close the fiber tray.10. Screw the locking screw to secure the fiber tray.

6.2 AlarmsTable 6-1 describes the alarms for the HLT 7xxxR. Table 6-2 describes additional alarms that are specific to HLT 7x16R models.

Every alarm is reported via the display on the front panel, via SNMP, and via the web interface. In addition, any alarm triggers the alarm relay, and the Status LED on the front panel illuminates red. For information on accessing the front panel alarms displays, see Section 2.2 The Menu System on page 2-3.

Alarms

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 6–3

Table 6-1: HLT 7xxxR Alarms

Alarm Description

Laser Power Low Laser power is below 13 dBm (20 mW). The laser remains on.

Laser Temperature Low Laser temperature is more than 5° C low. The laser turned off automatically.

Laser Temperature High Laser temperature is more than 5° C high. The laser turned off automatically.

RF Heat Sink Temperature High

The RF heat sink temperature is above 80° C.

RF Input Level Low The RF input composite level is below 0.1 V.

AGC Alarm SP Beyond Limits

The system changed from MGC to AGC while the RF level was below 0.1 V or above 4.8 V.

AGC Alarm RF Pad Beyond Limits

The system has exceeded the 0.1 dB to 9.9 dB range of the internal pad while in AGC mode.

Fiber 1 Output Power Low

The output power on fiber 1 is below 2 mW (3 dBm) for the HLT 7x06R, or below 10 mW (10 dBm) for the HLT 7x16R.

Fiber 2 Output Power Low

The output power on fiber 2 is below 2 mW (3 dBm) for the HLT 7x06R, or below 10 mW (10 dBm) for the HLT 7x16R.

Laser Disabled by Rear Switch

The lasers have been disabled manually via the Laser Off switch.

Table 6-2: Alarms in HLT 7x16R Only

Alarm Description

EDFA Input Power Low Input power is below 12.5 dBm.

EDFA Output Power Low EDFA output power is more than 0.5 dB below the set point.

EDFA Case Temperature Beyond Limit

Case temperature is below –10° C or above 75° C.

EDFA Pump Temperature Beyond Limit

Pump laser temperature is more than 10° C below or above the temperature set point.

EDFA Pump Current Beyond Limit

In constant power mode, laser current exceeds end of life value (typically, 1000 mA).

Maintenance and Troubleshooting

6–4 Copyright © 2005 Harmonic Inc.

6.3 TroubleshootingShould a problem occur, see if the symptoms are listed in Table 6-3.

Table 6-3: Troubleshooting Solutions

Symptom Solution

Laser power low alarm

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). If that does not correct the problem, contact Customer Service (see Section 6.4).

Laser temperature low/high alarm

Verify that the unit is operating within the proper temperature range (0° to 50° C).

Verify that nothing is obstructing airflow through the openings in the front and back of the unit.

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2).

If none of the above corrects the problem, contact Customer Service (see Section 6.4).

Heat sink temperature alarm

Verify that the unit is operating within the proper temperature range (0° to 50° C).

Verify that nothing is obstructing airflow through the openings in the front and back of the unit.

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2).

If none of the above corrects the problem, contact Customer Service (see Section 6.4).

Low RF input alarm Verify that an RF input cable is connected to the RF input connector on the rear panel.

See Section 3.10 Setting Gain Control and Adjusting the RF Pad on page 3-8.

If you know the input power per channel, you can manually adjust the pad to keep the RF level constant. For example, if the input power is only 16 dBmV per channel, you may be able to reach the optimum drive level by reducing the internal pad in the transmitter (see Section 3.10.3). However, if the internal pad is reaching 0 dB, you need to increase the input level externally.

If you do not know the input level or the number of channels, try the following: With the RF input turned on, switch to AGC mode (see Section 3.10.1), then recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). The pad should adjust automatically within its limit for optimum drive level.

If none of the above corrects the problem, and you believe there is sufficient input power to the transmitter, contact Customer Service (see Section 6.4).

Troubleshooting

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 6–5

AGC alarm An AGC alarm is triggered when switching from MGC mode to AGC mode with your composite RF input power outside of the RF detection circuit. When an AGC alarm is present, the unit does not operate in AGC mode.

Verify the RF level by using the front panel interface (HLT Status menu > RF System> RF Composite Level; see Section 2.2.1).

If the RF level detector value is greater than 4.8 V, the drive level is too high, causing distortion. (The optimum drive level for the transmitter is 80 channel NTSC at 18dBmV per channel.) Reduce the input level, or increase the internal RF pad (see Section 3.10.3), until good performance is achieved.

If the RF level detector value is less than 0.1 V, the drive level is too low, causing degraded carrier-to-noise performance. Increase the input level, or reduce the internal RF pad (see Section 3.10.3), until good performance is achieved.

If you do not know the input level or the number of channels, try the following: With the RF input turned on, switch to AGC mode (see Section 3.10.1), then recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). The pad should adjust automatically within its limit for optimum drive level.

If none of the above corrects the problem, and you believe there is sufficient input power to the transmitter, contact Customer Service (see Section 6.4).

AGC alarm RF pad beyond limits

This alarm triggers when the unit is in AGC mode and the RF input power to the transmitter varies so much that the internal pad cannot accommodate it.

Verify the RF pad setting by using the front panel interface (HLT Status > RF System Status > RF Attenuation Pad; see Section 2.2.1).

If the RF pad setting is 0 dB, the RF input power to the transmitter is too low for the internal pad to adjust, causing degraded carrier-to-noise performance. Increase the RF input level to the transmitter.

If the RF pad setting is 10 dB, the RF input power to the transmitter is too high for the internal pad to adjust, causing distortion. Reduce the RF input level to the transmitter.

Optical output power low alarm

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). If that does not correct the problem, contact Customer Service (see Section 6.4).

Table 6-3: Troubleshooting Solutions continued

Symptom Solution

Maintenance and Troubleshooting

6–6 Copyright © 2005 Harmonic Inc.

Power LED on the front panel does not illuminate

Verify that the –48 V power supply is connected properly (the power supply is rated from –36 V to –72V). If that does not correct the problem, contact Customer Service (see Section 6.4).

Bad picture quality and/or bad bit error rate (BER)

There are many possible causes (not only related to the transmitter) of bad picture quality or QAM BER. However, performance can be significantly improved by quick verification and optimization. Follow the steps below to verify the RF drive level and optimize SBS.

1. Verify the RF drive level to the transmitter:

If the transmitter is under-powered, the CNR on every channel is seriously degraded, causing poor image quality. An under-powered transmitter triggers the low RF input alarm (see the low RF input alarm, above).

If the transmitter is over-powered, distortion increases significantly, causing both image quality and BER to degrade.

If you do not know the input level, try the following: With the RF input turned on, switch to AGC mode (see Section 3.10.1), then recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). The pad should adjust automatically within its limit for optimum drive level. The unit may trigger some AGC alarms that may help you determine the input level (see AGC alarms, above).

2. Optimize SBS (see Section 3.12):

The symptoms of SBS are poor carrier-to-noise ratio, especially in the low-frequency channels, resulting in poor picture quality and bad BER. If you suspect insufficient SBS suppression, try the following: Verify that the power input into the fiber is no more than 20 dBm. (The transmitter is rated for SBS suppression of 20 dBm at more than 20 km of fiber; at shorter distances, SBS suppression is increased.) Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2), because the SBS setting could have been unintentionally changed. Verify that the unit is in dual-tone mode. (If the unit is in single-tone mode, SBS suppression capability is reduced to 17dBm.) Adjust the SBS setting while monitoring performance.

If none of the above corrects the problem, contact Customer Service (see Section 6.4).

Table 6-3: Troubleshooting Solutions continued

Symptom Solution

In Case of Problems

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) 6–7

6.4 In Case of ProblemsIf you continue to have a problem, contact the Harmonic Customer Service department (see Appendix B, Harmonic Inc. – Offices). A service technician will assist you in determining whether a fault exists with the unit.

If the service technician determines that you need to return the unit, she or he will issue you a Return Material Authorization (RMA) Number. You must include this RMA number on the shipping container when returning the unit, and with all correspondence regarding the unit.

To return the unit, send it to one of the Harmonic Headquarters addresses listed in Appendix B, Harmonic Inc. – Offices. Please add the note:

Attn: Customer ServiceRMA no. _________

6.5 DisclaimerHarmonic Inc. reserves the right to change any products described herein at any time, and without prior notice. Harmonic assumes no responsibility or liability arising from the use of the products described herein, except as expressly agreed to in writing by Harmonic. The use and purchase of this product does not convey a license under any patent rights, copyrights, trademark rights, or any intellectual property rights of Harmonic. Nothing hereunder constitutes a representation or warranty that using any products in the manner described herein will not infringe any patents of third parties.

6.6 Warranty Summary1

This Harmonic Inc. product is warranted against defects in material and workmanship for twelve (12) months from the date of shipment. Harmonic Inc. will, at its option, either repair or replace products that prove to be defective.

We shall have no liability or responsibility to the customer or any other person with respect to any loss or damage caused or alleged to be caused directly or indirectly by equipment or software sold or furnished by us. Read instructions carefully. No liability will be assumed for any damage caused by improper installation.

The information in this document is subject to change without notification. The content of this document is protected by copyright. No part of this document may be reproduced or copied by any means without the permission of Harmonic Inc.

1. See Order Acknowledgment for complete warranty details.

Maintenance and Troubleshooting

6–8 Copyright © 2005 Harmonic Inc.

For warranty or repair, return this product to a service facility designated by Harmonic Inc. The Buyer shall prepay shipping charges to Harmonic Inc., and Harmonic Inc. shall pay shipping to return the product to the buyer. However, buyer shall pay all shipping charges, duties and taxes for products returned to Harmonic Inc. from outside the U.S.

Harmonic Inc. warrants that its software, as well as firmware designated by Harmonic Inc. for use with the product, will execute its programming instructions when installed properly for ninety (90) days. Harmonic Inc. does not warrant that the operation of the product or software or firmware will be uninterrupted or error free.

6.7 Limitations of WarrantyThe foregoing warranty shall not apply to defects resulting from abuse, neglect by the Buyer, improper installation or application by the Buyer, the Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product or improper site penetration or maintenance.

No other warranty is expressed or implied. Harmonic Inc. specifically disclaims the implied warranties or merchantability and fitness for a particular purpose.

6.8 Exclusive RemediesThe remedies provided herein are the Buyer’s sole and exclusive remedies.

Harmonic Inc. shall not be liable for any direct, indirect, special, incidental or consequential damages, whether based upon contract, tort or any other legal theory.

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) A–1

Appendix ATechnical Specifications

A.1 PerformanceCarrier-to-Noise (CNR):

HLT 7706R1: ≥ 55 dB

HLT 7716R1: ≥ 53 dB

HLT 7806R2: ≥ 54 dB

HLT 7816R2: ≥ 52 dB

Carrier-to-CSO (C/CSO): > 65 dB

Carrier-to-CTB: > 65 dB

SBS suppression: 17 dBm (50 mW)

A.2 Optical OutputWavelength:

1563 to 1564 nm (HLT 7xxxR-D7)

1550 to 1560 nm (HLT 7xxxR-F7)

1540 to 1547 nm (HLT 7xxxR-W7)

Flatness: < 1 dB peak-to-valley

Number of outputs: 2

Optical power per output:

HLT 7x06R: = 9 dBm minimum, 10 dBm typical

HLT 7x16R: > 16 dBm (40 mW)

Laser shutdown: Laser on/off switch

Connector type: SC/APC, E2000

1. With 80 NTSC channels, 4 MHz bandwidth, 0 km fiber2. With 42 CENELEC channels, 5 MHz bandwidth, 0 km fiber

Technical Specifications

A–2 Copyright © 2005 Harmonic Inc.

A.3 RF InputInput level range: 18 to 26 dBmV

Operational bandwidth:

NTSC: 55 to 550 MHz analog; 550 to 860 MHz digital

PAL: 48 to 870 MHz analog

RF attenuator adjustment range: 12 dB

Impedance: 75 Ω

Return loss: ≥ 16 dB

Gain control: Auto/manual

Connector type: Standard F, RG-59 cable type (0.64 to 0.80 mm center conductor diameter)

A.4 User InterfaceFront panel

Full numeric keypad

Two-line alphanumeric display (vacuum fluorescent)

RF monitor point:

Flatness: ± 0.5 dB

Return loss: ≥ 16 dB

Test point loss: 20 dB ± 1 dB

Rear panel

Laser on/off switch

Optical output drawer

RJ-45 connector for network management

RJ-11 TTL alarm port

5-pin alarm relay contacts

Network Management

SNMP v1, v2c, v3

Web interface via HTTP 1.1

Technical Specifications

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) A–3

A.5 ElectricalPower requirements:

AC model: 100 to 240 VAC; 50 to 60 Hz

DC model: –48 VDC (–36 to –72 VDC)

Power consumption:

HLT 7x06R: < 75 W

HLT 7x16R: < 100 W

A.6 EnvironmentalOperating temperature range: 0° to 50° C/32° to 122° F

Storage temperature range: –40° to 70° C/–40° to 158° F

Relative humidity: 85% maximum, non-condensing

A.7 PhysicalDimensions: 19" W x 1.7" H x 21" D / 48.3 cm W x 4.3 cm H x 53.3 cm D

Weight:

HLT 7x06R: 31 lbs / 14 kg

HLT 7x16R: 33 lbs / 15 kg

Mounting: 19-inch equipment rack

A.8 Laser Radiation WarningComplies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (July 26, 2001) as applicable to Class 1M Laser Products.

This light emission device is classified to IEC 60825-1:1993 + A1 + A2

WARNING: INVISIBLE LASER RADIATION. DO NOT VIEW DIRECTLY WITH MAGNIFIERS. CLASS 1M LASER PRODUCT Viewing the laser output with optical instruments (e.g. magnifier, microscopes) within a distance of 100 mm may pose an eye hazard.

WARNUNG: UNSICHTBARE LASERSTRAHLUNG. NICHT DIREKT MIT LUPE BETRACHTEN. KLASSE 1M LASER PRODUKT. Das betrachten des Laser Ausgangs mit optischen Instrumenten (z.B. Vergrößerungsglas, Mikroskope) innerhalb eines Abstandes von 100 mm kann eine Augenverletzungs-Gefahr darstellen.

Technical Specifications

A–4 Copyright © 2005 Harmonic Inc.

ATTENTION: RADIATION LASER INVISIBLE. NE PAS OBSERVER À LA LOUPE DIRECTEMENT. PRODUIT LASER CLASSE 1M L'observation des effets lasers à l'aide d'un appareil optique (comme loupe, microscope…) à une distance jusqu'à 100 mm peut poser un danger à l'oeil.

A.9 Agency CertificationsUL60950, CSA60950 (cTUVus)

FCC Part 15 Class A, VCCI, CDRH

EN60950, EN60825-1 (TUV GS-mark)

EN55022 Class A, EN55024 (TUV EMC-mark, CE)

Technical Specifications

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) A–5

A.10 Management Parameters

A.10.1 HLT 7xxxR Management Parameters

HLT 7xxxR General Parameters

Model Number: HLT 7xxxRProduct Description: MAXLink Plus TransmitterProduct Application MIB: SCTE-HMS-HE-OPTICAL-TRANSMITTER-MIB, HL-MAXLINKPLUS-MIB

HL-MAXLINKPLUS-HIGH-POWER-MIB (HLT 7x16R only)

Front Panel Label HTTP Label SNMP MIB Variable

1 Model number Model Type: xxxxxxxx Model: HLT7xxxR-xx-AS-DC-1 entPhysicalModelName.1

2 Serial Number HLT S/N: xxxxx Serial Number: xxxxxxxx entPhysicalSerialNum.1

3 Firmware version Firmware Version x.xx Firmware Ver: x.x.xxx entPhysicalFirmwareRev.1

4 Hardware Version n/a Hardware Ver: x.xx entPhysicalHardwareRev.1

5 DHCP On? DHCP Enable Yes/No n/a n/a

6 IP address IP Address xxx.xxx.xxx.xxx n/a n/a

7 Subnet mask IP Subnet Mask xxx.xxx.xxx.xxx n/a n/a

8 Default gateway IP Default Gateway xxx.xxx.xxx.xxx n/a n/a

9 Laser Safety Switch

Laser Switch ON/OFF Laser Switch On (Off) hlMaxlinkPlusUnitSafetySwitch.1

10 Laser Temperature Laser Temperature = xx.xC Laser Temperature (Laser 1) x.xx C hlMaxlinkPlusLaserTemp2.1.1

11 Laser Bias Current Laser Bias Current: xx.x mA Laser Bias Current (Laser 1) x.xxx A hlMaxlinkPlusLaserBiasCurrent2.1.1

12 Laser Power Laser Power = xx.x dBm Laser Power (Laser 1) xx.x dBm hlMaxlinkPlusLaserPower2.1.1

13 Laser DFB Attenuation

DFB Attenuation Cmd = xxxx Laser DFB Attenuation (Laser 1) xxx hlMaxlinkPlusLaserDfbAtt2.1.1

14 Fiber 1 Output Power

Output Power Fiber 1 = xx.x dBm Output Power Fiber 1 = xx.x dBm heOpTxLaserOutputPower.1.1

15 Fiber 2 Output Power

Output Power Fiber 2 = xx.x dBm Output Power Fiber 2 = xx.x dBm heOpTxLaserOutputPower.1.2

16 Laser Wavelength Laser Wavelength: xxxx.xx nm Laser Wavelength (Laser 1) xxxx.xx nm heOpTxLaserWavelength.1.1

17 MGC/AGC Switch RF Gain Control Mode AGC/MGC RF Gain Control Mode MGC (AGC) heOpTxInputAGCMode.1.1

18 MGC Command MGC Manual Pad = xx.x dB RF Attenuation Pad x.x dB heOpTxInputRFPadLevel.1.1

19 RF Temperature RF Head Sink Temp = xx.xC RF Heatsink Temperature xx.x C hlMaxlinkPlusRfTemp.1

20 RF Level RF Composite Level = xx.x V RF Composite Level x.xxx V hlMaxlinkPlusRfLevelComp.1

21 RF Attenuation RF Attenuation Pad = xx.x dB RF Attenuation Pad x.x dB hlMaxlinkPlusRfAttenuation.1

22 39MHz Switch 39 MHz (HLE Sync) Switch ON/OFF 39 MHz Switch On (Off) hlMaxlinkPlusRf39MhzSwitch.1

23 AGC Setpoint n/a RF AGC Setpoint x.xxx V hlMaxlinkPlusRfAgcSp.1

24 Modulator Attenuation Command

Mod Attenuation Cmd = xxx Modulator Attenuation Command xxx hlMaxlinkPlusSbsModAttCmd.1

25 Modulator Level n/a n/a hlMaxlinkPlusSbsModLevel.1

26 Single Dual Tone Switch

Single/Dual Tone Mode Single/Dual Tone Switch Dual (Single) hlMaxlinkPlusSbsSingleToneSwitch.1

27 DFT Index Distance Factor Coarse = xx SBS Coarse Distance Index x hlMaxlinkPlusSbsDftIndex.1

28 DFT Distance Distance Factor Fine = xxxx SBS Fine Distance Factor x.xx hlMaxlinkPlusSbsDftDistance.1

29 EDFA Input Power Fault

EDFA Input Power Low EDFA Input Power Low hlMaxlinkPlusHPEdfaInputPwrFault.1

30 EDFA Output Power Fault

EDFA Output Power Low EDFA Output Power Low hlMaxlinkPlusHPEdfaOutputPwrFault.1

31 EDFA Case Temperature Fault

EDFA Case Temperature Beyond Limit

EDFA Case Temperature Beyond Limit hlMaxlinkPlusHPEdfaCaseTempFault.1

32 EDFA Pump Temperature Fault

EDFA Pump Temperature Beyond Limit

EDFA Pump Temperature Beyond Limit hlMaxlinkPlusHPEdfaPumpTempFault.1

33 EDFA Pump Current Fault

EDFA Pump Current Beyond Limit EDFA Pump Current Beyond Limit hlMaxlinkPlusHPEdfaPumpCurrFault.1

EDFA (HLT 7x16R Only)

SBS

Generic Parameter Description

General

Optics, Lasers

RF

Technical Specifications

A–6 Copyright © 2005 Harmonic Inc.

HLT 7xxxR Alarm Parameters

Front Panel Label HTTP Label SNMP MIB Variable

34 Laser Safety Switch Alarm

Lasers Disabled by Rear Switch

Unit Safety Switch

discreteAlarmState.14.hlMaxlinkPlusUnitSafetySwitch.1.0

35 Laser 1 Temperature Low (High)

Alarm

Laser 1 Temperature Low (High)

Laser 1 Temperature

currentAlarmState.15.hlMaxlinkPlusLaserTemp2.1.1

36 Laser 1 Power Alarm

Laser 1 Power Low Laser 1 Output Power

currentAlarmState.15.hlMaxlinkPlusLaserPower2.1.1

37 Fiber 1 Output Power Low

Fiber 1 Output Power Low Fiber 1 Output Power

discreteAlarmState.18.heOpTxLaserOutputStatus.1.1.off(1)

38 Fiber 2 Output Power Low

Fiber 2 Output Power Low Fiber 2 Output Power

discreteAlarmState.18.heOpTxLaserOutputStatus.1.2.off(1)

39 RF Temperature

Alarm

RF Heat Sink Temperature High

RF Temperature

currentAlarmState.15.hlMaxlinkPlusLaserTemp2.1.1

40 RF Input Alarm RF input Level Low RF Composite Level

currentAlarmState.14.hlMaxlinkPlusRfLevelComp.1

41 RF AGC Setpoint Alarm

AGC Alarm - SP Beyond Limits

RF AGC Setpoint

currentAlarmState.14.hlMaxlinkPlusRfAgcSp.1

42 RF Attenuation Alarm

AGC Alarm - RF Pad Beyond Limits

RF Attenuation currentAlarmState.14.hlMaxlinkPlusRfAttenuation.1

43 EDFA Input Power Fault

EDFA Input Power Low EDFA Input Power Low

discreteAlarmState.15.hlMaxlinkPlusHPEdfaInputPwrFault.1.2

44 EDFA Output Power Fault

EDFA Output Power Low EDFA Output Power Low

discreteAlarmState.15.hlMaxlinkPlusHPEdfaOutputPwrFault.1.2

45 EDFA Case Temperature

Fault

EDFA Case Temperature Beyond Limit

EDFA Case Temperature Beyond Limit

discreteAlarmState.15.hlMaxlinkPlusHPEdfaCaseTempFault.1.2

46 EDFA Pump Temperature

Fault

EDFA Pump Temperature Beyond Limit

EDFA Pump Temperature Beyond Limit

discreteAlarmState.15.hlMaxlinkPlusHPEdfaPumpTempFault.1.2

47 EDFA Current Fault

EDFA Pump Current Beyond Limit

EDFA Pump Current Beyond Limit

discreteAlarmState.15.hlMaxlinkPlusHPEdfaPumpCurrFault.1.2

Alarm Parameter

DescriptionGeneral

Optics, Lasers

RF

EDFA (HLT 7x16R Only)

Technical Specifications

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) A–7

HLT 7xxxR Alarm Thresholds

Alarm HiHi SNMP MIB Variable

Default Alarm HiHi Threshold Alarm LoLo SNMP MIB Variable

Default Alarm LoLo Threshold

Alarm Description

34 Laser Safety Switch Alarm

n/a n/a n/a n/a Indicates that the lasers have been disabled manually via the Laser Off switch.

35 Laser 1 Temperature Low

(High) Alarm

analogAlarmHIHI.15.hlMaxlinkPlusLaserTemp2.1.1 300 (30 deg C) analogAlarmLOLO.15.hlMaxlinkPlusLaserTemp2.1.1 200 (20 deg C) Indicates that laser 1 temperature is more than 5° C low or high.

36 Laser 1 Power Alarm

n/a n/a analogAlarmLOLO.15.hlMaxlinkPlusLaserPower2.1.1 130 (13 dBm) Indicates that laser 1 power is below 13 dBm (20 mW).

37 Fiber 1 Output Power Low

n/a n/a analogAlarmLOLO.18.heOpTxLaserOutputPower.1.1 3dBm default for HLT7x06R

10dBm default for HLT7x16R

Indicates that the output power on fiber 1 is below 2 mW (3 dBm) for the HLT 7x06R or.below 10 mW (10 dBm) for the HLT 7x16R.

38 Fiber 2 Output Power Low

n/a n/a analogAlarmLOLO.18.heOpTxLaserOutputPower.1.2 3dBm default for HLT7x06R

10dBm default for HLT7x16R

Indicates that the output power on fiber 2 is below 2 mW (3 dBm) for the HLT 7x06R or.below 10 mW (10 dBm) for the HLT 7x16R.

39 RF Temperature Alarm

analogAlarmHIHI.14.hlMaxlinkPlusRfTemp.1 800 (80 deg C) n/a n/a Indicates that the RF heat sink temperature is above 80° C

40 RF Input Alarm n/a n/a analogAlarmLOLO.14.hlMaxlinkPlusRfLevelComp.1 100 (0.1 V) Indicates the RF input level is below 0.1 V

41 RF AGC Setpoint Alarm

analogAlarmHIHI.14.hlMaxlinkPlusRfAgcSp.1 4800 (4.8V) analogAlarmLOLO.14.hlMaxlinkPlusRfAgcSp.1 100 (0.1V) Indicates that the system changed from MGC to AGC while the RF level was below 0.25 V or above 4.8 V

42 RF Attenuation Alarm

analogAlarmHIHI.14.hlMaxlinkPlusRfAttenuation.1 99 (9.9 dB) analogAlarmLOLO.14.hlMaxlinkPlusRfAttenuation.1 1 (0.1 dB) Indicates that the system has exceeded the 0.1 dB to 9.9 dB range of the internal pad while in AGC mode.

43 EDFA Input Power Fault

n/a n/a n/a n/a Input power is below 12.5 dBm.

44 EDFA Output Power Fault

n/a n/a n/a n/a EDFA output power is more than 0.5 dB below the set point.

45 EDFA Case Temperature Fault

n/a n/a n/a n/a Case temperature is below –10° C or above 75° C.

46 EDFA Pump Temperature Fault

n/a n/a n/a n/a Pump laser temperature is more than 10° C below or above the temperature set point.

47 EDFA Current Fault

n/a n/a n/a n/a In constant power mode, laser current exceeds end of life value (typically, 1000 mA).

EDFA (HLT 7x16R Only)

Alarm Parameter Description

General

Laser System, Optics

RF

Technical Specifications

A–8 Copyright © 2005 Harmonic Inc.

HLT 7xxxR Alarm TroubleshootingAlarm Description Alarm Troubleshooting

34 Laser Safety Switch Alarm

Indicates that the lasers have been disabled manually via the Laser Off switch.

n/a

35 Laser 1 Temperature Low (High) Alarm

Indicates that laser 1 temperature is more than 5° C low or high.

Verify that the unit is operating within the proper temperature range (0° to 50° C).

Verify that nothing is obstructing airflow through the openings in the front and back of the unit.

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2).

If none of the above corrects the problem, contact Customer Service (see Section 6.4).

36 Laser 1 Power Alarm Indicates that laser 1 power is below 13 dBm (20 mW).

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). If that does not correct the problem, contact Customer Service (see Section 6.4)

37 Fiber 1 Output Power Low

Indicates that the output power on fiber 1 is below 2 mW (3 dBm).

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). If that does not correct the problem, contact Customer Service (see Section 6.4).

38 Fiber 2 Output Power Low

Indicates that the output power on fiber 2 is below 2 mW (3 dBm).

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). If that does not correct the problem, contact Customer Service (see Section 6.4).

39 RF Temperature Alarm Indicates that the RF heat sink temperature is above 80° C

Verify that the unit is operating within the proper temperature range (0° to 50° C).

Verify that nothing is obstructing airflow through the openings in the front and back of the unit.

Recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2).

If none of the above corrects the problem, contact Customer Service (see Section 6.4)

40 RF Input Alarm Indicates the RF input level is below 0.2 V

Verify that an RF input cable is connected to the RF input connector on the rear panel.

See Section 3.10 Setting Gain Control and Adjusting the RF Pad on page 3-9

.If you know the input power per channel, you can manually adjust the pad to keep the RF level constant. For example, if the input power is only 16 dBmV per channel, you may be able to reach the optimum drive level by reducing the internal pad in the transmitter (see Section 3.10.3). However, if the internal pad is reaching 0 dB, you need to increase the input level externally.

If you do not know the input level or the number of channels, try the following: With the RF input turned on, switch to AGC mode (see Section 3.10.1), then recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). The pad should adjust automatically within its limit for optimum drive level.

If none of the above corrects the problem and you believe there is sufficient input power to the transmitter, contact Customer Service (see Section 6.4)

41 RF AGC Setpoint Alarm Indicates that the system changed from MGC to AGC while the RF level was below 0.25 V or above 4.8 V

An AGC alarm is triggered when switching from MGC mode to AGC mode with your composite RF input power outside of the RF detection circuit. When an AGC alarm is present, the unit does not operate in AGC mode.

Verify the RF level by using the front panel interface (HLT Status menu > RF System> RF Level; see Section 2.2.1)

.If the RF level detector value is greater than 4.8 V, the drive level is too high, causing distortion. (The optimum drive level for the transmitter is 80 channel NTSC at 18dBmV per channel.) Reduce the input level, or increase the internal RF pad (see Section 3.10.3), until good performance is achieved.

If the RF level detector value is less than 0.1 V, the drive level is too low, causing degraded carrier-to-noise performance. Increase the input level, or reduce the internal RF pad (see Section 3.10.3), until good performance is achieved.

If you do not know the input level or the number of channels, try the following: With the RF input turned on, switch to AGC mode (see Section 3.10.1), then recall factory settings by pressing the RCL function key on the front panel (see Section 3.10.2). The pad should adjust automatically within its limit for optimum drive level.

If none of the above corrects the problem and you believe there is sufficient input power to the transmitter, contact Customer Service (see Section 6.4)

42 RF Attenuation Alarm Indicates that the system has exceeded the 0.1 dB to 9.9 dB range of the internal pad while in AGC mode.

This alarm triggers when the unit is in AGC mode and the RF input power to the transmitter varies so much that the internal pad cannot accommodate it.

Verify the RF pad setting by using the front panel interface (HLT Status > RF System Status > RF Attenuation Pad; see Section 2.2.1).

If the RF pad setting is 0 dB, the RF input power to the transmitter is too low for the internal pad to adjust, causing degraded carrier-to-noise performance. Increase the RF input level to the transmitter.

If the RF pad setting is 10 dB, the RF input power to the transmitter is too high for the internal pad to adjust, causing distortion. Reduce the RF input level to the transmitter.

Alarm Parameter

Laser System, Optics

General

RF

43 EDFA Input Power Fault Input power is below 12.5 dBm.

n/a

44 EDFA Output Power Fault

EDFA output power is more than 0.5 dB below the set point.

n/a

45 EDFA Case Temperature Fault

Case temperature is below –10° C or above 75° C.

n/a

46 EDFA Pump Temperature Fault

Pump laser temperature is more than 10° C below or above the temperature set point.

n/a

47 EDFA Current Fault In constant power mode, laser current exceeds end of life value (typically, 1000 mA).

n/a

EDFA (HLT 7x16R Only)

Technical Specifications

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) A–9

Technical Specifications

A–10 Copyright © 2005 Harmonic Inc.

HLT 7xxxR MAXLink Transmitter Product Manual Rev B (4/05) B–1

Appendix BHarmonic Inc. – Offices

Assistance

For technical support and customer service, call toll free: 800.730.4099.

Harmonic’s web address is www.harmonicinc.com.

Worldwide Technical Support and Return Materials AuthorizationTel: 1.800.730.4099 (inside U.S.)Tel: +1.408.542.2771 (outside U.S.)Fax: +1.408.490.6770E-mail: rma@harmonicinc.com

U.S.A. Corporate HeadquartersHarmonic Inc.549 Baltic WaySunnyvale, CA 94089, U.S.A.Tel: 1.800.788.1330 (inside U.S.)Tel: +1.408.542.2500 (outside U.S.)Fax: +1.408.490.6708

Asia Pacific HeadquartersHarmonic LimitedSuite 703-704, CMG Asia TowerThe Gateway, 15 Canton RoadTsimshatsui, Kowloon, Hong KongTel: +852.2116.1119Fax: +852.2116.0083

Europe and Africa HeadquartersHarmonic Inc.Continental Square, 4 Place de LondresSaturne Building, 2nd FloorROISSY CDG Cedex, 95727, FranceTel: +33.1.48.62.92.12Fax: +33.1.48.62.92.36

U.K., Middle East, and South Africa HeadquartersHarmonic Inc.21 Progress Business CentreWhittle ParkwaySlough, Berkshire SL1 6DQ, United KingdomTel: +44.1.753.714.367Fax: +44.1.753.540.990

Harmonic Inc. – Offices

B–2 Copyright © 2005 Harmonic Inc.