Hrm7121 Reva

MAXLink™ HRM 7121Optical ReceiverProduct Manual

Manual Part No.: 700-0052015

Rev AMay 2006

MAXLink HRM 7121 Optical Receiver Product Manual

Copyright © 2006 Harmonic Inc.

Copyright 2006 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.

MAXLink HRM 7121 Optical Receiver Product Manual Rev A (5/06) i

Table of Contents

Chapter 1 Overview

1.1 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21.3 The MAXLink System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.4 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Chapter 2 Front Panel Interface

2.1 Front Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.1.1 Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.1.2 Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.3 Navigation Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.4 Numeric Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2 The Menu System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.2.1 HRM Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.2.2 HRM Adjustments Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.2.3 HRM Alarms Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Chapter 3 Installing the HRM 7121 Receiver

3.1 Rear Panel Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.2 Receiving and Inspecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.3 Tools and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.4 Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.5 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33.6 Mounting the HRM 7121 in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.7 Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.7.1 Connecting AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.7.2 Connecting DC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.8 Connecting the Optical Input Fiber Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.9 Connecting the RF Output Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.10 Configuring Two HRM 7121 Receivers as a Redundant Pair . . . . . . . . . . . 3-93.11 Connecting the TTL Alarm Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.12 Connecting the Ethernet Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.13 Assigning IP Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.14 Changing Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113.15 Adjusting the RF Output Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Chapter 4 Web Interface

4.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.2 HTTP Access Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.3 Accessing and Using the Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34.4 Adjusting the HRM 7121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44.5 Web Interface Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Table of Contents

ii Copyright © 2006 Harmonic Inc.

Chapter 5 Connecting the HRM 7121 to an NMS

Chapter 6 Maintenance and Troubleshooting

6.1 HRM 7121 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.2 Cleaning Fiber Optic Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors . . . . . . . . 6-26.2.2 Cleaning MAXLink Receiver Optical Connectors . . . . . . . . . . . . . . 6-2

6.3 In Case of Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.4 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Appendix A Technical Specifications

Appendix B Harmonic Inc. – Offices

MAXLink HRM 7121 Optical Receiver Product Manual Rev A (5/06) 1–1

1Overview

1.1 About This Manual

This instruction manual is a guide to installing and operating the MAXLink™ HRM 7121 Optical Receiver. Please read the entire manual before beginning installation.

• Chapter 1 gives general information about the HRM 7121.• 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 © 2006 Harmonic Inc.

1.2 Description

The MAXLink™ HRM 7121 Optical Receiver is a 1 rack-unit (RU) module that receives signal over optical fiber at both 1310 and 1550 nm wavelengths with 1 GHz bandwidth.

The HRM 7121 has the following key features:

• Compact single rack-unit package• Primary/backup switching capability• Wide operational bandwidth (45 to 1003 MHz)• Wide optical input power range (–10 to +3 dBm)• Output levels above 38 dBmV per channel eliminate the need for post

amplifiers• Outstanding noise, distortion, and flatness specifications for high-quality

supertrunk optical links

Figure 1-1 shows the HRM 7121.

Figure 1-1. HRM 7121 Optical Receiver

The MAXLink System


1.3 The MAXLink System

Harmonic MAXLink products can be used in combination to enable a range of systems with varying performance benefits. While Harmonic’s MAXLink products set new standards for long-link performance, the MAXLink Plus system substantially improves upon these results.

Figure 1-2 shows basic configurations and approximate relative performance of the MAXLink and MAXLink Plus products.

Figure 1-2. Harmonic MAXLink systems and performance

NOTE:

The MAXLink Plus Transmitter can provide up to 3 dB of CNR improvement depending on your system configuration. For more information on system performance, consult Harmonic customer

support.

Overview


1.4 Applications

The HRM 7121 receiver is ideal for both 1310 nm and 1550 nm-based network applications. The MAXLink system provides a cost-effective solution for a variety of applications and architectures, including long-haul transport beyond the reach of 1310 nm transmitters, and fiber-dense architectures that take advantage of high-power optical amplifiers. In addition, this system is ideally suited for new, evolving transport architectures such as redundant rings, broadcast layer transmission, and hub interconnects used in broadband networks.

The HRM 7121 broadband optical receiver offers a wide operational bandwidth to support the high-performance MAXLink transmission products. The HRM 7121 provides superior performance, element management control via SNMP, an embedded web interface, and switching capabilities through NMS or TTL logic.

The stand-alone 1-RU design of the MAXLink product line saves valuable rack space and operational costs since an additional platform and power supplies are not needed.


2Front Panel Interface

This chapter introduces the HRM 7121 front panel interface. You can view and adjust settings during installation from the front panel interface as described in Chapter 3,

Installing the HRM 7121 Receiver

. You can also use the front panel interface to monitor and control the operation of the HRM 7121. The front panel gives you access to all the adjustments and status information for the HRM 7121 via a simple menu system.

Harmonic MAXLink products feature a 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

Front Panel Interface


2.1 Front Panel Features

Figure 2-1 shows the HRM 7121 front panel.

Figure 2-1. HRM 7121 front panel

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

Figure 2-2. HRM 7121 front panel detail

2.1.1 Front Panel LEDs

There are four LEDS on the front panel:

• Status• Power• Mute• Locked

Status LED

The

Status

LED indicates the alarm state of the HRM 7121. Green indicates the unit is operating normally. Red indicates an active alarm.

Power LED

The

Power

LED illuminates green when power is connected to the HRM 7121.

Mute LED

The

Mute

LED illuminates amber when the output is muted, which can occur if the receiver is configured as part of a redundant pair. For further information about muting, see Section

3.10 Configuring Two HRM 7121 Receivers as a Redundant Pair

on page 3-9.

Locked LED

The

Locked

LED illuminates amber when the front panel interface is locked.

Keys2 x 20 Character Display

LEDs RF Monitor

Front Panel Features


2.1.2 Function Keys

The function keys provide a one-step action to:

•

[ADJ]

Adjust SettingsPress the

[ADJ]

key to go directly to the HRM Adjustments menu.•

[RCL]

Recall Factory SettingsPress

[RCL]

to return the unit to the default settings set at the Harmonic factory.

•

[STAT]

View StatusPress

[STAT]

to go directly to the HRM Status menu.•

[ALM]

View Current AlarmsPress

[ALM]

to go directly to the HRM Alarms menu.•

[LOCK]

Lock Front PanelPress

[LOCK]

to deactivate the front panel keypad. Press

[LOCK]

again to activate the keypad. The

Locked

LED is amber when the front panel keypad is locked.

There are also two keys that assist in menu navigation:

• [ESC]

EscapePress

[ESC]

to return to the previous menu level.

• [NUM]

NumberPress

[NUM]

to activate the numeric keypad so that you can enter numbers.

2.1.3 Navigation Keys

The navigation keys allow you to move through the menu system and select variables:

• Use the and keys to move through the menus.• Use the and keys to scroll through adjustment options.

- The display shows a left and right arrow symbol ( ) when you can scroll through values for the current menu.

- The display shows a pound sign (

#

) when you have pressed

[NUM]

, or when you must enter a value from the keypad (such as the IP address).

• Use the

[ENT]

key to select a menu, or to save settings you have changed.

2.1.4 Numeric Keypad

The numeric keypad allows you to enter parameters. The display shows the pound sign (

#

) when the system 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 System

The menu system has three high-level choices:

• HRM Status• HRM Adjustments• HRM Alarms

The status and alarms menus provide read-only information. All adjustments to the HRM 7121 are made through the HRM Adjustments menu.

Figure 2-3 shows the first menu level.

Figure 2-3. HRM 7121 first menu level

The Menu System


2.2.1 HRM Status Menu

The HRM Status menu provides you with basic information in the Receiver Status submenu, and you can view current settings and performance values in the Receiver Diagnostics submenu.

Figure 2-4 shows the information presented in the HRM Status menu. Additional diagnostic information is available by navigating to

RF Gain Mode

.

Figure 2-4. HRM Status menu



The RF Gain Mode diagnostics submenu provides details on the current state of RF output and optical input, as shown in Figure 2-5. Access this submenu by going to the HRM Status menu, then Receiver Diagnostics, then RF Gain Mode.

The RF Gain Mode diagnostics submenu tells you the current mode of the receiver—AGC disabled, RF AGC, or Optical AGC— and additional status information, which varies based on the receiver’s current mode.

Figure 2-5. RF Gain Mode diagnostics submenu

The Menu System


2.2.2 HRM Adjustments Menu

Use the HRM Adjustments menu to set up and adjust the HRM 7121. Figure 2-6 shows the HRM Adjustments menu. You can make additional adjustments within

RF Gain Mode

and

Unit Address Adjust

, as shown in Figure 2-7 on page 2-8 and Figure 2-8 on page 2-9.

Figure 2-6. HRM Adjustments menu



The RF Gain Mode adjustment submenu allows you to change the mode and adjust RF output and optical input. Access this submenu by going to the HRM Adjustments menu, then Receiver Adjustment, then RF Gain Mode.

The RF Gain Mode adjustment submenu allows you to change the receiver’s mode—AGC disabled, RF AGC, or Optical AGC— and make additional adjustments, which vary based on the receiver’s mode.

Figure 2-7. RF Gain Mode adjustment submenu

The Menu System


The Unit Address Adjust submenu allows you to set the unit’s IP address, subnet mask and default gateway, as shown in Figure 2-8. This submenu is located within the HRM Adjustments menu.

Figure 2-8. Unit Address Adjust submenu

2.2.3 HRM Alarms Menu

The front panel status LED indicates when the HRM 7121 has active alarms. You can check the alarms through the HRM Alarms menu. Figure 2-9 shows the possible alarms. Only the active alarms are displayed.

Figure 2-9. HRM Alarms menu




3Installing the HRM 7121 Receiver

This chapter provides information on installing and setting up the MAXLink™ HRM 7121 Optical Receiver. Please read all the instructions before beginning installation.


• The rear panel• How to receive and inspect the HRM 7121• Tools and accessories• Cable requirements• Precautions• How to mount and power the unit• How to connect the cables• How to configure two HRM 7121 receivers as a redundant pair• How to assign IP addresses and change passwords• How to adjust the RF output power level

3.1 Rear Panel Diagram

Figure 3-1 shows rear panel features of the HRM 7121 (DC power model).

Figure 3-1. HRM 7121 rear panel features

Ethernet Port

TTL Alarm Port

Alarm Relay

DC Power Input

Ground Contact

Optical Input Port

RF Output Port

Primary/Backup Connector



3.2 Receiving and Inspecting

As 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.

3.3 Tools and Accessories

The following tools and accessories are provided with the HRM 7121:

• 2 DC power terminal blocks (DC power model only)• 1 AC power cord (AC power model only)• Primary/backup cable• Accessory kit

The following tools are necessary for installation and are not included with the HRM 7121:

• Phillips screwdriver• Flat-bladed screwdriver

The following tools are recommended for installation and are not included with the HRM 7121:

• Optical power meter• HP 8590 spectrum analyzer or equivalent• Tunable RF filter• Preamplifier• Short fiber cable

3.4 Cable Requirements

To install the HRM 7121, 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

, with F connectors and center-conducting pin diameter 0.022 inch to 0.042 inch, for RF output.

Precautions


3.5 Precautions

Warning Read the installation instructions before connecting the system to the power source.

Attention Avant de brancher le système sur la source d’alimentation, consulter les directives d’installation.

Warnung Vor dem Anschließen des Systems an die Stromquelle die Installationsanweisungen lesen.

Warning This product relies on the building’s installation for short-circuit (over current) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15 A U.S. (240 VAC, 10 A international) is used on the phase conductors (all current-carrying conductors).

Attention Pour ce qui est de la protection contre les courts-circuits (surtension), ce produit dépend de l’installation électrique du local. Vérifier qu’un fusible ou qu’un disjoncteur de 120 V alt., 15 A U.S. maximum (240 V alt., 10 A international) est utilisé sur les conducteurs de phase (conducteurs de charge).

Warnung Dieses Produkt ist darauf angewiesen, daß im Gebäude ein Kurzschluß- bzw. Überstromschutz installiert ist. Stellen Sie sicher, daß eine Sicherung oder ein Unterbrecher von nicht mehr als 240 V Wechselstrom, 10 A (bzw. in den USA 120 V Wechselstrom, 15 A) an den Phasenleitern (allen stromführenden Leitern) verwendet wird.

Warning For the DC version, an external disconnect shall be provided and shall be easily accessible. Harmonic recommends that you use a 5 A circuit breaker.

Attention Pour la version de C.c, un interrupteur externe doit être facilement accessible. Harmonic recommande l’utilisation d’un disjoncteur de 5 Ampères.

Warnung Für die DC Version muss eine leicht zugängliche Trennvorrichtung in der Verdrahtung eingebaut sein. Harmonic empfiehlt, dass Sie einen 5 A Sicherungsautomaten benutzen.



Warning The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device.

Attention La combinaison de prise de courant doit être accessible à tout moment parce qu’elle fait office de système principal de déconnexion.

Warnung Vor dem Anschließen des Systems an die Stromquelle die Installationsanweisungen lesen.

Warning The unit has more than one power supply connection; all connections must be removed to remove all power from the unit.

Attention Cette unité est équipée de plusieurs raccordements d’alimentation. Pour supprimer tout courant électrique de l’unité, tous les cordons d’alimentation doivent être débranchés.

Warnung Diese Einheit verfügt über mehr als einen Stromanschluß; um Strom gänzlich von der Einheit fernzuhalten, müssen alle Stromzufuhren abgetrennt sein.

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.

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.

Precautions


Attention Pour éviter toute blessure corporelle pendant les operations 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.

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 HRM 7121 in a RackThe HRM 7121 mounts in a standard 19-inch equipment rack.

To mount the HRM 7121 in a rack:

1. Place the unit in a standard 19-inch equipment rack.2. Use the four mounting screws (provided with the rack) to attach the

mounting ears on the HRM 7121 front panel to the rack.

Rack Guidelines

When operating the unit in an equipment rack, ensure that:

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

• There is sufficient airflow around the unit.• Electrical circuits are not overloaded by considering the nameplate rating

of all the connected equipment.• There is over current protection.• The equipment is properly grounded.• No objects are placed on top of the unit.

ESD ALERT

Follow strict Electrostatic Discharge (ESD) precautions when handling or working on Harmonic equipment and related components.

Caution Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Attention L'usage de contrôles ou d'ajustements ou l'exécution de procédures autres que ceux spécifiés ici peut résulter a l'exposition de rayonnements hasardeux.

Achtung Gebrauch oder Justage von Bedienelementen oder die Durchfuehrung von anderen Verfahren als die hierin beschrieben kann zu gefährlicher Strahlenbelastung fuehren.

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

Connecting Power


3.7 Connecting PowerThe HRM 7121 is available in an AC power model and a DC power model. After mounting the HRM 7121 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 HRM 7121 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, as shown in Figure 3-1 on page 3-1.

To connect AC power:

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

2. Connect the power cord to a 110 VAC or 220 VAC (50/60 Hz) electrical socket. (The AC-powered HRM 7121 features an auto-sensing power supply.)

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 HRM 7121 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 Figure 3-1 on page 3-1.

The two power plugs allow you to provide redundant (backup) power. If you provide redundant power, the HRM 7121 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 the ground. This is important for your safety. The ground contact is located on the rear panel, as shown in Figure 3-1 on page 3-1.

2. Attach a DC power terminal block to the rear panel of the HRM 7121 using a small flat-bladed screwdriver.

3. Connect two 18–12 gauge power wires from the power source to the DC terminal block. The HRM 7121 starts up. It takes about 30 seconds for all systems to operate.

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



3.8 Connecting the Optical Input Fiber CableThe HRM 7121 has one optical input port, which is located on the rear panel, as shown in Figure 3-1 on page 3-1.

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

To connect the optical input fiber cable to the HRM 7121:

1. Remove the plastic connector cover from the optical input connector on the rear panel of the HRM 7121.

2. Clean the input fiber connector. Follow the instructions in Section 6.2.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors on page 6-2.

3. Clean the internal fiber connector. Follow the instructions in Section 6.2.2 Cleaning MAXLink Receiver Optical Connectors on page 6-2.

NOTE: Any contamination of either the fiber cable or HRM 7121 receiver connector can significantly degrade optical link performance. This degradation will most likely manifest itself as poor carrier-to-noise (CNR) performance.

4. Note the key characteristics of the mating connectors and align them accordingly. Gently insert the fiber cable connector into that of the HRM 7121 until the connector clicks into place.

3.9 Connecting the RF Output CableThe RF output connector of the HRM 7121 is located on the rear panel, as shown in Figure 3-1 on page 3-1. It is a female F connector that accepts 75 Ohm impedance coaxial cable.

NOTE: To ensure performance integrity, use coaxial cable with a .025 to .032 inch center conductor diameter.

To connect the RF output cable:

1. Connect the male F connector of the coaxial cable to the RF output connector on the rear panel of the HRM 7121.

2. Tighten the cable securely (using an F-connector tool, if necessary).3. Connect the other end of the cable to your RF device. In a redundant

system, you may need to connect the two output cables (from two receivers) to a combiner or switch.

Configuring Two HRM 7121 Receivers as a Redundant Pair


3.10 Configuring Two HRM 7121 Receivers as a Redundant PairThis section provides instructions for configuring HRM 7121 receivers as redundant pairs. If you are configuring the HRM 7121 to operate independently, you can skip this section.

Each HRM 7121 receiver can be configured in one of the following ways:

• As an independent, standalone unit (not connected to another unit)• As the primary unit in a redundant pair (connected to a backup unit)• As the backup unit in a redundant pair (connected to a primary unit)

In a redundant pair configuration, you use one unit for primary fiber paths and a second unit for backup fiber paths. Normally, the primary receiver mutes the RF output of the backup receiver. If the primary receiver is in alarm (the optical input level on the primary receiver falls below –10 dBm, the optical power low alarm threshold), the primary receiver activates (unmutes) the backup receiver and mutes itself.

When the primary receiver’s optical input level rises above the optical alarm limit, it removes the unmute command from the backup receiver and the backup receiver returns to its default muted state.

Use the Primary/Backup cable (included with the HRM 7121) to connect the two units of the redundant pair. One end of the cable is labeled Primary, the other end is labeled Backup.

To configure two HRM 7121 receivers as a redundant pair:

1. Install both HRM 7121 receivers.2. Connect the Primary end of the Primary/Backup cable to the

Primary/Backup connector of the primary receiver. The Primary/Backup connector is located on the rear panel of the HRM 7121, as shown in Figure 3-1 on page 3-1.

3. Connect the Backup end of the Primary/Backup cable to the Primary/Backup connector of the backup receiver.

3.11 Connecting the TTL Alarm CableThe TTL-compatible alarm port is an RJ-11 connector located on the rear panel, as shown in Figure 3-1 on page 3-1.

You can use the TTL alarm port to connect the HRM 7121 to other devices, in order to monitor alarms on the HRM 7121.

Two pins are used for the alarm:

• Pin 3 is the ground.• Pin 4 is the TTL alarm output. When an alarm is present, the level of the

signal from Pin 4 goes high, sending a 5-volt signal. When there is no alarm from the HRM 7121, the signal from Pin 4 stays low.



3.12 Connecting the Ethernet CableYou can connect the HRM 7121 to your TCP/IP network, so that you can monitor and control the receiver 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 HRM 7121.

To connect the Ethernet cable:

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

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

3.13 Assigning IP AddressesIP addresses must be assigned to the HRM 7121 receiver, so that NMSs and web browsers can communicate with it. You can use the front panel to assign the IP address, subnet mask, and default gateway.

NOTE: IP addresses are unique in a local Ethernet system network. If you do not know the IP addresses of the HRM 7121, contact your system administrator.

To assign an IP address:

1. Scroll through the menus until the display reads HRM Adjustments, then press [ENT] to enter the HRM Adjustments menu.

2. Press until the display reads Adjust Unit Address, then press [ENT]. The display reads Adjust IP Address: xxx.xxx.xxx.xxx #

3. Use the number keys to type the IP address of the HRM 7121, then press [ENT].

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

5. Use the number keys to type the subnet mask of the HRM 7121, then press [ENT].

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

7. Use the number keys to type the default gateway of the HRM 7121, then press [ENT].

Changing Passwords


3.14 Changing PasswordsPasswords are required to adjust the settings of the HRM 7121 via the web, or to access the HRM 7121 via Telnet. As a security measure, Harmonic recommends that, during installation, you change both passwords from their default values. The HRM 7121 has a command-line interface (CLI) that allows you to change the passwords.

Table 3-1 shows the user name and default password required to access the HRM 7121 user interfaces.

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

NOTE: User names and passwords are case sensitive.

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

1. Using a computer that is connected to the same IP network as the HRM 7121, start a Telnet program.

2. Using the Telnet program, enter the transmitter’s IP address to establish a remote connection to the HRM 7121.

3. To log into the HRM 7121, type the user name and password, then press Enter. The default user name is admin and the default password is password.

4. To change the Telnet-access password, type passwd new_telnet_password (where new_telnet_password represents the new password), then press Enter.If you are unsure what Telnet password to assign, talk to your network administrator.

5. To change the web-adjustments password, type passwd -h new_web_password (where new_web_password represents the new password), then press Enter.If you are unsure what web password to assign, talk to 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.

Table 3-1: HRM 7121 User Names and Passwords

Interface User Name Default Password

Telnet Command Line admin password

Web Status (not required) (not required)

Web Adjustments Config config



3.15 Adjusting the RF Output Power LevelAfter completing installation of the HRM 7121, you can perform the following procedure to adjust the RF output power level to your specifications.

Because the RF output level depends on optical received power, any EDFA output power and optical pads along the link must be finalized before adjusting the HRM 7121 output power. Output power also varies with the optical modulation index from the transmitter at the headend. Therefore, the transmitter must be adjusted first.

To adjust the RF output power level:

1. Connect a spectrum analyzer or an RF power meter to the RF monitor using a short cable.

2. Read the detected RF power. The RF monitor level is 20 dB below the output level of the receiver, ±1 dB.

3. Adjust the RF output level to your specifications by using the front panel interface (see Section 2.2.2 HRM Adjustments Menu on page 2-7).If you use an RF power meter, it measures composite (total) RF power rather than power per channel. You need to calculate the average power per channel based on measured composite power, number of analog channels, number of digital channels, and digital channel level. Table 3-2 provides examples.

Table 3-2: Power per Analog Channel (dBmV) for Various Channel Plans

LoadComposite Power (dBmV)

49 50 51 52 53 54 55 56 57 58 59 60 61 6280 CW 30.0 31.0 32.0 33 34.0 35.0 36.0 37.0 38.0 39.0 40.0 41.0 42.0 43.080 CW + 30 QAM @ -10 dBm 29.8 30.8 31.8 32.8 33.8 34.8 35.8 36.8 37.8 38.8 39.8 40.8 41.8 42.880 CW + 30 QAM @ -6 dBm 29.6 30.6 31.6 32.6 33.6 34.6 35.6 36.6 37.6 38.6 39.6 40.6 41.6 42.680 CW + 50 QAM @ -10 dBm 29.7 30.7 31.7 32.7 33.7 34.7 35.7 36.7 37.7 38.7 39.7 40.7 41.7 42.780 CW + 50 QAM @ -6 dBm 29.3 30.3 31.3 32.3 33.3 34.3 35.3 36.3 37.3 38.3 39.3 40.3 41.3 42.360 CW 31.2 32.2 33.2 34.2 35.2 36.2 37.2 38.2 39.2 40.2 41.2 42.2 43.2 44.260 CW + 50 QAM @ -10 dBm 30.9 31.9 32.9 33.9 34.9 35.9 36.9 37.9 38.9 39.9 40.9 41.9 42.9 43.960 CW + 50 QAM @ -6 dBm 30.4 31.4 32.4 33.4 34.4 35.4 36.4 37.4 38.4 39.4 40.4 41.4 42.4 43.460 CW + 70 QAM @ -10 dBm 30.7 31.7 32.7 33.7 34.7 35.7 36.7 37.7 38.7 39.7 40.7 41.7 42.7 43.760 CW + 70 QAM @ -6 dBm 30.1 31.1 32.1 33.1 34.1 35.1 36.1 37.1 38.1 39.1 40.1 41.1 42.1 43.140 CW 33.0 34.0 35.0 36.0 37.0 38.0 39.0 40.0 41.0 42.0 43.0 44.0 45.0 46.040 CW + 70 QAM @ -10 dBm 32.3 33.3 34.3 35.3 36.3 37.3 38.3 39.3 40.3 41.3 42.3 43.3 44.3 45.340 CW + 70 QAM @ -6 dBm 31.4 32.4 33.4 34.4 35.4 36.4 37.4 38.4 39.4 40.4 41.4 42.4 43.4 44.440 CW + 90 QAM @ -10 dBm 32.1 33.1 34.1 35.1 36.1 37.1 38.1 39.1 40.1 41.1 42.1 43.1 44.1 45.140 CW + 90 QAM @ -6 dBm 31.0 32.0 33.0 34.0 35.0 36.0 37.0 38.0 39.0 40.0 41.0 42.0 43.0 44.0


4Web Interface

This chapter introduces the HRM 7121 web interface. Once the receiver is operating, the web interface provides a convenient means to manage it. MAXLink receivers have an embedded HTTP server that allows you to remotely view the status of alarms and settings, or make adjustments to the receiver. However, for security reasons, a password is required to change any settings.


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

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 HRM 7121• Returning the settings to factory defaults

Web Interface


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

To use the web interface:

• The HRM 7121 must be properly installed, as described in Chapter 3, Installing the HRM 7121 Receiver.

• The HRM 7121 must be connected to your IP network, as described in Section 3.12 Connecting the Ethernet Cable on page 3-10.

• IP addresses must have been assigned to the HRM 7121, as described in Section 3.13 Assigning IP Addresses on page 3-10.

4.2 HTTP Access ControlThere are two levels of access to the MAXLink receiver web interface:

• Status—for monitoring the receiver• Adjustments—for monitoring and adjusting the receiver

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 receiver, while others may adjust the settings.

The web client is, by default, “read only.” User name and password are not required for read-only access. You can change the access level by clicking the Change Access link near the top of the web interface. When prompted, enter the proper user name and password. Once verified, you are given the read-write capability to configure the unit remotely as needed. Once logged on, the user name and password should be changed for network security. Please contact Harmonic for the default user name and password.

NOTE: To maintain network security, Harmonic recommends that you change the password during installation, as described in Section 3.14 Changing Passwords on page 3-11.

Accessing and Using the Web Interface


4.3 Accessing and Using the Web InterfaceTo access the web interface:

1. Using a computer that is connected to the same TCP/IP network as the HRM 7121, open a web browser.

2. In the web browser’s Address (URL) field, type the IP address of the receiver in the format http://xxx.xxx.xxx.xxx, then press Enter. Your browser connects to the HRM 7121, and the web interface appears, as shown in Figure 4-1.The top frame shows basic information about the HRM 7121. The left frame displays any current alarms and refreshes every 30 seconds. The right frame shows information about the system, RF, and optics.

Figure 4-1. Web interface (status mode)

Web Interface


4.4 Adjusting the HRM 7121To change any of the receiver’s settings, you must enter the web interface, then change your access level.

To adjust the HRM 7121:

1. Enter the web interface, as described in Section 4.3. The web interface appears, as shown in Figure 4-1 on page 4-3, and you are in status (read-only) mode.

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

Figure 4-2. Change Access 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 get the password from your system administrator.The user name and password are case sensitive.The web interface reappears, as shown in Figure 4-3 on page 4-5, and you are in adjustments mode.

NOTE: To maintain network security, Harmonic recommends that you change the password during installation, as described in Section 3.14 Changing Passwords on page 3-11.

Adjusting the HRM 7121


Figure 4-3. Web interface (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, click Apply for your changes to take effect. You can change as many values as you want before clicking Apply. If you want to clear your changes, before clicking Apply, you can click Refresh Values to revert to the previous settings. The Confirmation page appears, as shown in Figure 4-4.

Figure 4-4. Confirmation page

Web Interface


4.5 Web Interface TipsThis section provides some tips that will help you use the web interface.

Grayed-out Values

In a text field, values that appear as gray text are read only and cannot be changed.

Apply Button

After you change one or more parameters on a page, you must click Apply to have the changes take effect.

Refresh Values Button

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


5Connecting the HRM 7121 to an NMS

Once the HRM 7121 is operating, you can use a network management system (NMS) to monitor and control it. This chapter tells you what steps to take to connect the HRM 7121 to an NMS.

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

MAXLink receivers have an embedded SNMP agent that enables communication between the HRM 7121 and any devices that support SNMP versions 1, 2, or 3.

To connect the HRM 7121 to an NMS:

1. Complete the installation procedures described in Chapter 3, Installing the HRM 7121 Receiver. To connect to an NMS, the HRM 7121 must be connected to your IP network as described in Section 3.12 Connecting the Ethernet Cable on page 3-10, and IP addresses must have been assigned to the HRM 7121 as described in Section 3.13 Assigning IP Addresses on page 3-10.

2. Determine the IP address of the HRM 7121.3. 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 HRM 7121. Feed the MIBs for the HRM 7121 into your NMS’s MIB compiler.

5. Add the HRM 7121 as an SNMP trap target in your NMS, so that the NMS receives SNMP notifications from the HRM 7121.

Connecting the HRM 7121 to an NMS


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)


6Maintenance and Troubleshooting


• Alarms for the HRM 7121• How to clean fiber optic connectors• How to return the unit for service• Manufacturer disclaimer

NOTE: The HRM 7121 does not include any customer-serviceable components.

6.1 HRM 7121 AlarmsTable 6-1 describes the alarms for the HRM 7121. When an alarm condition exists, the Alarm LED illuminates on the front panel.

6.2 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.

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

Table 6-1: HRM 7121 Alarms

Alarm Description

System Temperature Too High Internal temperature exceeds 70 °C.

Optical Input Power Low Optical input is below –10 dBm.

Maintenance and Troubleshooting


In addition, if you suspect that the optical connector of an HRM 7121 may have been exposed to contamination (by a dirty fiber cable connector, for example), you should properly clean the HRM 7121 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.

6.2.1 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.

6.2.2 Cleaning MAXLink Receiver Optical Connectors

To clean the optical connector of a MAXLink receiver:

1. Release the internal optical connector from the internal bulkhead adaptor. The end of the internal fiber connector can now be cleaned.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.

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

3. Use a drop of high-grade isopropyl alcohol to wet part of the paper.4. In one continuous motion, pull the connector from the wet part of the

paper to the dry part.5. Once the cleaning is complete, re-insert the internal fiber connector into

the bulkhead adaptor and press the two parts together carefully.

In Case of Problems


6.3 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. _________

6.4 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.

Maintenance and Troubleshooting


MAXLink HRM 7121 Optical Receiver Product Manual Rev A (5/06) A–1

Appendix ATechnical Specifications

A.1 Optical InputOptical input power: –10 to +3 dBm

Wavelength: 1295 to 1325 nm and 1535 to 1565 nm

Return loss: > 45 dB

Noise: < 5 pA/√Hz

Responsivity:

0.85 A/W @ 1310 nm0.95 A/W @ 1550 nm

Number of ports: 1

Connector type: SC/APC, SC/UPC, or E2000/APC

A.2 RF OutputOutput level: > 38 dBmV per channel, maximum1

Carrier-to-CSO:

65 dB2

68 dB3

Carrier-to-CTB:

69 dB2

74 dB3

Operational bandwidth: 45 to 1003 MHz

1. At 0 dBm optical input with 3.7% modulation index and 0 dB pad.

2. At 38 dBmV output level, 80 NTSC CW carriers, optical input = 0 dBm, without transmitter contribution.

3. At 38 dBmV output level, 42 CENELEC CW carriers, optical input = 0 dBm, without transmitter contribution.

Technical Specifications

A–2 Copyright © 2006 Harmonic Inc.

Flatness:

±0.5 dB (45 to 550 MHz)±1.0 dB (550 to 870 MHz)–1 to + 2 dB (870 to 1003 MHz)

Slope: < 0.5 dB

Output stability: ±1.0 dB

Impedance: 75 Ω

Connector: F-type (accepts 0.51 to 1.07 mm center conductor diameter)

Return loss:

> 16 dB (45 to 550 MHz)> 14 dB (550 to 870 MHz)> 12 dB (870 to 1003 MHz)

Gain control: 0 to 15 dB

A.3 User InterfaceFront panel

Two-line alphanumeric display (vacuum fluorescent)

Function keypad

Navigation keypad

Numeric keypad

Status indicator: green LED

Power indicator: green LED

Mute indicator: amber LED

Locked indicator: amber LED

RF monitor point:

Coupling loss (level): –20 dB ± 1 dB

Connector type: Male GSK

Rear panel

Optical input

RF output

Primary/Backup switching connector

RJ-45 connector for network management

TTL alarm contacts

Alarm relay


MAXLink HRM 7121 Optical Receiver Product Manual Rev A (5/06) A–3

Network Management

SNMP v1, v2c, v3

Web interface via HTTP 1.1

A.4 ElectricalPower requirements:

AC model: 100 to 240 VAC, 50 to 60 Hz, auto sensing

DC model: –36 to –72 VDC (–48 VDC typical); dual redundant connectors

Power consumption: 35 W maximum

A.5 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.6 PhysicalDimensions: 19.0" W x 1.7" H x 11.5" D / 48.3 cm W x 4.3 cm H x 29.2 cm D

Weight: 11 lbs / 5 kg

Mounting: 19-inch equipment rack

A.7 Laser SafetyThis product does not contain a laser, but is used in systems that contain lasers.

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

A.8 Agency CertificationsUL60950, CSA60950 (cTUVus)

FCC Part 15 Class A, VCCI

EN60950 (TUV GS-mark)

EN 55022 Class A, EN55024 (TUV EMC-mark, CE)


A–4 Copyright © 2006 Harmonic Inc.

A.9 Compliance with WEEEHarmonic will ensure that all products that cannot be re-used will be recycled in compliance with the WEEE Directive. To that end, users are advised that (1) Harmonic equipment is not to be discarded in household or office garbage, (2) customers may consult the Harmonic web site (www.harmonicinc.com) for additional and updated information on this process.

A.10 Models AvailableMAXLink™ HRM 7121 Optical Receivers by model number.:

HRM 7121 - yy - zz

AS = SC/APC

AC = AC power supplyDC = DC power supply

AE = E2000/APCAU = SC/UPC

MAXLink HRM 7121 Optical Receiver Product Manual Rev A (5/06) 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: [email protected]

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: +44.1.628.600.100Fax: +44.1.628.666.736

Harmonic Inc. – Offices

B–2 Copyright © 2006 Harmonic Inc.

Documents

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