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Cisco Prisma II Installation And Operation Manual

Reverse video receiver and reverse data receiver
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Prisma II Reverse Video Receiver and
Reverse Data Receiver
Installation and Operation Guide

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Summary of Contents for Cisco Prisma II

  • Page 1 Prisma II Reverse Video Receiver and Reverse Data Receiver Installation and Operation Guide...
  • Page 2 For Your Safety Explanation of Warning and Caution Icons Avoid personal injury and product damage! Do not proceed beyond any symbol until you fully understand the indicated conditions. The following warning and caution icons alert you to important information about the safe operation of this product: You may find this symbol in the document that accompanies this product.
  • Page 3 Trademark Acknowledgments Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners.
  • Page 4 Contents Safety Precautions ............................v Compliance ..............................vii Laser Safety ............................. viii Chapter 1 Introduction Overview ......................... 1-1 Introduction ......................1-2 The Front Panel ....................... 1-5 The Back Panel ......................1-6 Configuration Overview ..................1-7 Chapter 2 Installation Overview ......................... 2-1 Preparing for Installation ..................
  • Page 5 Contents, Continued Chapter 4 Operation Using LCI LCI Introduction ..................... 4-3 System Requirements..................... 4-4 Installing LCI ......................4-5 Connecting your Laptop Computer to the Chassis ........... 4-9 Starting LCI ......................4-10 LCI Module Tree Overview ................4-11 Accessing the Module Details Window ............4-13 Checking the Operating Status ................
  • Page 6 Safety Precautions Protect Yourself From Electric Shock and Your System From Damage! This product complies with international safety and design standards. Observe all • safety procedures that appear throughout this guide, and the safety symbols that are affixed to this product. If circumstances impair the safe operation of this product, stop operation and •...
  • Page 7 Safety Precautions, Continued Factory Service Refer service only to service personnel who are authorized by the factory. Enclosure Do not allow moisture to enter this product. • Do not open the enclosure of this product unless otherwise specified. • Do not push objects through openings in the enclosure of this product. •...
  • Page 8 Compliance Laser and Electrical Safety UL 1419:1997: A sample of this equipment has been tested and found to meet the requirements of UL 1419:1997. CSA C22.2 No. 1:1994: A sample of this equipment has been tested and found to meet the requirements of CSA C22.2 No. 1:1994. CFR 21:1996: A sample of this equipment has been tested and found to meet the requirements of CFR 21:1996.
  • Page 9 Modifications Do not make modifications to this product without the approval of Cisco. Whenever modifications that may affect hazard levels are made to the optical fiber communication system, the person or organization that performs such modification must reassess hazard levels.
  • Page 10 Laser Safety, Continued Laser Warning Labels This module bears the following labels. 78-713378-01 Rev C...
  • Page 11 Introduction This chapter describes the front and back panels, and gives a setup summary for the Prisma II™ Reverse Video Receiver and the Prisma II Reverse Data Receiver. This guide covers the two following products. Prisma II Reverse Data Receiver (data grade) •...
  • Page 12 Overview The Prisma II Reverse Video Receiver and the Prisma II Reverse Data Receiver are part of a family of products in the Prisma II product line. These two reverse receivers are plug-in modules for the Prisma II platform. These products are indoor reverse receivers capable of receiving reverse path optical signals from a reverse transmitter.
  • Page 13 Introduction, Continued Prisma II Reverse Receiver Operation The two reverse receivers are used in conjunction with a reverse transmitter to receive reverse path signals to the hub or headend. The two reverse receivers each contain two separate optoelectronic receivers. Optical input is through two optical connectors mounted on the front of the module.
  • Page 14 Introduction, Continued Block Diagram A block diagram of the Prisma II Reverse Receiver is shown below. Introduction 78-713378-01 Rev C...
  • Page 15 RF output verification. All are easily accessible. ALARM and Power ON indicators on the front panel allow you to monitor power and alarm status at a glance. The features of the front panel of the two Prisma II Reverse Receivers are shown below. Part...
  • Page 16 The power and communications connector on the back of the module mates with a connector inside of the chassis, and supplies power from the chassis to the transmitter. The 110-pin connector also routes alarm and status-monitoring information from the receiver to the Prisma II Chassis. Introduction 78-713378-01 Rev C...
  • Page 17 The Prisma II Intelligent Communications Interface Module (ICIM) • If an ICIM is installed in the Prisma II Chassis, it may be used to configure and monitor Prisma II application modules within its domain. For instructions on operating this module using the ICIM, refer to Chapter 3, Operation Using the ICIM.
  • Page 18 WARNING: Allow only qualified personnel to install, operate, maintain, or service this product. Otherwise, personal injury or equipment damage may occur. In This Chapter This chapter gives step-by-step instructions on installing the Prisma II Dual Reverse Receiver. Topic See Page...
  • Page 19 Unpacking and Inspecting the Module As you unpack the module, inspect it for shipping damage. If you find any damage, contact Cisco. Refer to Chapter 6 for information on contacting Cisco Services. Equipment and Tools Needed Before you begin, make sure that the module is in good condition. You need the following equipment and tools to install these modules.
  • Page 20 Equipment Rack To install this module, your site must be equipped with an Electronics Industry Association (EIA) equipment rack that properly houses the Prisma II Chassis with proper spacing for air circulation. For instructions on installing the chassis in the rack, refer to the guide that was shipped with the chassis.
  • Page 21 Power, RF input or output, and other connectors may be located on either the front or rear of the Prisma II Chassis. Connections to the chassis serve the same function and are made in the same manner regardless of the location of the connectors or chassis configuration.
  • Page 22 Site Requirements, Continued Rear Access Chassis Illustration The Prisma II Chassis may be configured as front access or rear access depending on the system you have purchased. The rear access chassis is shown here. Front Access Chassis Illustration The front access chassis is shown here.
  • Page 23 Connecting the RF Cables to the Chassis RF Cable Connection Procedure Important: This procedure assumes the Prisma II Chassis is mounted in a rack. Follow this procedure to make the RF connections for each module to be installed. At the front/rear of the Prisma II Chassis, locate the RF ports.
  • Page 24 Installing the Module in the Chassis Installing the Module Important: The following procedure assumes the Prisma II chassis is mounted in a rack. This procedure applies to both chassis styles. To install the module in the chassis, follow these steps.
  • Page 25 Installing the Module in the Chassis, Continued Gently slide the module into the chassis until you feel the connectors on the back of the module join the receptacles at the back of the slot. Use the module ejector to lock the module in place. Note: Do not force or bang the module into the chassis.
  • Page 26 Connecting Optical Cables The Fiber Fish Tool The Fiber Fish tool that was shipped along with the Prisma II Chassis is used to pull an optical cable from the rear of the chassis to the front of the chassis so the optical cables can be connected to optical connectors on the front panel of Prisma II modules.
  • Page 27 Connecting Optical Cables, Continued Using the Fiber Fish to Pull the Optical Cable to the Prisma II Module To get an optical cable to the module follow these procedures. Insert the Fiber Fish tool through the slot located just above the bottom of the chassis.
  • Page 28 Attach one end of the optical cable to the RX1 optical input connector (connector 1), located on the front of the Prisma II Reverse Receiver. Route the other end of the optical cable to the appropriate destination. Repeat steps 1 and 2 for the RX2 optical input connector.
  • Page 29 EM IN/EM OUT cable. This cable is a standard “off the shelf” serial extension cable, DB9 Female to DB9 Male. This cable can be purchased at your local computer store. The Cisco part number for a 6-foot DB9 Female to DB9 Male extension cable is 180143.
  • Page 30 A connection is required from the first chassis containing an ICIM to the TNCS system. The Prisma II Cable Kit (738686) is required for this connection. Connect this cable to the EM IN of the first chassis containing an ICIM.
  • Page 31 Master/Slave Connections Master/Slave Operation The Prisma II Reverse Receiver ships from the factory configured as a "Master". LCI, TNCS, or the ICIM can be used to reconfigure the module as a “Slave.” The Prisma II Chassis allows for local hard-wired redundancy by using the ALARM IN and ALARM OUT connectors located on the chassis.
  • Page 32 Master/Slave Connections, Continued A module configured as a slave normally has its output turned off or disabled. When a critical alarm occurs in the master module, the master turns off and the slave module turns on. To make that happen, the ALARM OUT contacts from the master's slot must be wired to the ALARM IN contacts on the slave 's slot.
  • Page 33 Chapter 3 Operation Using the ICIM Overview Introduction The procedures in this chapter apply if you are using the Prisma II Intelligent Communications Interface Module (ICIM) to configure and operate the Prisma II Reverse Receivers. Scope of this Chapter Included in this chapter are descriptions of the ICIM front panel and the ICIM LCD, and detailed procedures on how to use the software menus to configure the module.
  • Page 34 LCD display. Important: Do not operate any Prisma II Chassis without a fan tray installed properly. If a fan tray is not installed in the Prisma II Chassis, the ICIM will not communicate with any of the modules in that chassis.
  • Page 35 The ICIM Front Panel ICIM Front Panel Illustration The following illustration shows the front panel of the ICIM. Continued on next page 78-713378-01 Rev C Operation Using the ICIM...
  • Page 36 The ICIM Front Panel, Continued ICIM Front Panel Features Part Function LCD screen Displays the ICIM menus, alarms, and status information. 12-key numeric Used to navigate the ICIM’s menus and configure the keypad application modules. Ethernet Connector Directly connects the ICIM to a network (future release). The ICIM LCD The ICIM LCD is the operator’s visual link to the ICIM software.
  • Page 37 The ICIM Front Panel, Continued The ICIM Key Pad The ICIM keypad has twelve keys that allow you to input and monitor operational parameters. The table below lists each key and a brief description of its function. Button Function Displays status information for the selected module STAT Displays configuration information for the selected module Displays all of the parameters in alarm for a selected module...
  • Page 38 The ICIM allows you to send configuration commands, to change alarm thresholds, and restore factory default settings in Prisma II modules. In order to ensure that no unauthorized changing of these parameters occurs, you have the option of using a password protection system.
  • Page 39 Continued Accessing the Password Menu The Password menu allows you to create, enter, change, or disable the user password. It also allows service personnel to use the Cisco password. To access the Password menu, follow the steps below. Press the key.
  • Page 40 The ICIM Password, Continued Entering the User Password If you wish to use the user password feature, you must create and enter a password of exactly eight digits using only the 0-9 number keys. The password remains active for 10 minutes after your last keystroke. If you want to change configuration parameters after more than 10 minutes, you are required to re-enter your password.
  • Page 41 The ICIM Password, Continued Changing the User Password If a user password has been entered, it may be changed. However, the current password must be active prior to changing it. If the current password has expired (more than 10 minutes have passed since your last keystroke), you must re-enter the current password before changing to a new one.
  • Page 42 The ICIM Password, Continued Disabling the User Password If a user password has been entered, you may disable it at any time. However, the current password must be active prior to disabling it. If the current password has expired (more than 10 minutes have passed since your last keystroke), you must re- enter the current password before disabling it.
  • Page 43 Operating the ICIM Using the ICIM Once the module is installed as described in Chapter 2, it runs without the aid of an operator. Unless alarms are generated or your system configuration changes, you should not need to make any adjustments to the module beyond the initial setup. Accessing the ICIM LCD Contrast To access the ICIM LCD contrast control from the MAIN menu, press the key.
  • Page 44 Operating the ICIM, Continued Prisma II ICIM Menu To display the ICIM menu, press the key. The ICIM menu (shown below) is ICIM displayed. Press the key to select the specific option. Display Description Shelf Displays the location of the ICIM module.
  • Page 45 Change Psw Disable Psw Update Address Prisma II Reverse Receiver Software Menu Structure From the MAIN or SCROLL menus, you can navigate to the Prisma II Reverse ALRM Receiver MODULE menu. From the MODULE menu, press the , or STAT key to display the desired parameter menu.
  • Page 46 Monitoring Operating Status Using the ICIM Monitored Parameters The table below describes the monitored parameters for this module. Parameter Function Operating Range InPwr1 Displays optical input power for Rx 1 -17.0 dBm to +2.0 dBm InPwr2 Displays optical input power for Rx 2 -17.0 dBm to +2.0 dBm ModTemp Displays module temperature.
  • Page 47 Monitoring Operating Status Using the ICIM, Continued STATUS Menus Press to select the STATUS menus. Some typical STATUS menus are shown STAT below. S T A T U S S T A T U S S T A T U S S T A T U S - - - - - - - - - - - - - - - - - - - -...
  • Page 48 Configuring the Reverse Receiver Using the ICIM Configurable Parameters Configurable parameters for the Prisma II Reverse Receiver are listed below. Control Function Values Default Mute1, Force Mute. Muting of the RF signal and ON or OFF removal of power to the amplifier only if the Mute2 Enable control is on for this particular side.
  • Page 49 Configuring the Reverse Receiver Using the ICIM, Continued Configuring Parameters Using the ICIM, you can configure the parameters listed above. To configure the parameters, follow these steps. CONFIG parameters are listed before these procedures. From the MAIN menu, press the key to highlight the Shelf and Slot ...
  • Page 50 Configuring the Reverse Receiver Using the ICIM, Continued CONFIG Menus Some typical Prisma II Reverse Receiver CONFIG menus are shown below. C O N F I G C O N F I G C O N F I G C O N F I G...
  • Page 51 Checking Reverse Receiver Alarms Using the ICIM Checking Alarms If the red ALARM LED on the front panel is blinking a minor alarm condition is indicated. If the red ALARM LED on the front panel is illuminated, a critical alarm conditions is indicated.
  • Page 52 Checking Reverse Receiver Alarms Using the ICIM, Continued User Alarm Data Display The user alarm data for this module is shown below. For additional troubleshooting information, see Chapter 5, Maintenance and Troubleshooting. Major Minor Minor Major High High Operating Range Alarm Function Limit...
  • Page 53 Checking Reverse Receiver Alarms Using the ICIM, Continued Module Alarm Data Display The module alarm data for this module is shown below. For additional troubleshooting information, see Chapter 5, Maintenance and Troubleshooting. Major Minor Minor Major Operating High High Range Alarm Function Limit...
  • Page 54 Checking Reverse Receiver Alarms Using the ICIM, Continued Setting User Alarm Thresholds User alarms have adjustable thresholds. To change a user alarm threshold from the factory default, follow the steps below. At the MODULE menu, press the key. The STATUS menu is displayed STAT on the ICIM.
  • Page 55 Checking Manufacturing Data Using the ICIM Checking Manufacturing Data The Manufacturing Data information listed later can be displayed on the ICIM menu. To access the module’s Manufacturing Data, follow these steps. From the MAIN menu, press the key to highlight the Shelf and Slot ...
  • Page 56 Checking Manufacturing Data Using the ICIM, Continued Manufacturing Data Display The table below describes the manufacturing data available for this module. Manufacturing Data Typical Values Module Reverse Data Receiver Module Type 2000 Serial # !ABCDEFG Date Code Sw Ver (Software Version) CCB607 Script Ver (Script Version) In Service Hours...
  • Page 57 Checking Manufacturing Data Using the ICIM, Continued M F G . D A T A M F G . D A T A - - - - - - - - - - - - - - - - - - - - S h e l f S h e l f S l o t...
  • Page 58 Using the ICIM to Save the Configuration Saving the Current Configuration To save the current module configuration, follow these steps after every change. After you have changed a parameter or entered data, press the key to ENTER save the changes and return to the MAIN menu. If you do not save your changes for two minutes, or if you press the SHIFT keys at the same time, changes are aborted and the display returns to...
  • Page 59 The installation steps and procedures in this chapter apply if you are using the Local Craft Interface (LCI) to configure and operate the Prisma II Reverse Data Receiver and the Prisma II Reverse Video Receiver. All instructions are identical for both products.
  • Page 60 Overview, Continued Topic See Page Checking the Operating Status 4-20 Configuring the Reverse Receiver 4-22 Checking Reverse Receiver Alarms 4-25 Modifying Reverse Receiver Alarm Limits 4-27 Checking Manufacturing Data 4-30 WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
  • Page 61 LCI Introduction LCI Function LCI is software that functions as a user interface for the Prisma II platform. LCI is installed on a laptop computer, which is then connected to a Prisma II Chassis. Using LCI, you can configure and monitor the modules in the chassis the computer is connected to.
  • Page 62 The required cable is a standard “off the shelf” DB9 Female to DB9 Male serial extension cable. The connectors are a serial 9-pin D-shell (EIA 574/232). The Cisco part number for a six-foot DB9 Female to DB9 Male extension cable is 180143.
  • Page 63 Installing LCI Introduction This section describes how to install your LCI software. Installing the LCI Software To install LCI, follow these steps. Close all programs that are running on your computer. Insert the LCI CD-ROM into your CD-ROM drive. Result: The LCI Installation program starts automatically. Click Next.
  • Page 64 Installing LCI, Continued Click Yes to accept the license agreement. Result: The License Agreement Confirmation dialog box displays. Click Yes. Result: The Destination Folder screen displays. Operation Using LCI 78-713378-01 Rev C...
  • Page 65 Installing LCI, Continued Do you want to install LCI in the specified folder? • If yes, click Next to begin the installation, and go to step 10. • If no, click Browse, and go to step 7. To specify where you want LCI to be installed, type the path in the Path box, or select it in the Directories box.
  • Page 66 Installing LCI, Continued Click Finish. Note: You have the option to select the Do not display LCI for Prisma II information check box. This bypasses the registration card that you can fill out to receive product updates. Result: LCI is installed, and the Registration Information file displays.
  • Page 67 Connecting Your Laptop Computer to the Chassis Introduction Before you start LCI, you must first connect your laptop computer to the chassis that contains the module(s) you want to check. Important: LCI communicates only with those modules located in the chassis your computer is attached to.
  • Page 68 Starting LCI Introduction When LCI is started, it polls the module(s) located in the chassis your computer is attached to. For each module it finds, LCI does the following: • Represents the module in the module tree of the main LCI window •...
  • Page 69 LCI Module Tree Overview Introduction The main window of LCI contains a tree that represents your system in a hierarchical manner. Module Tree In the graphic above, the module tree represents a laptop connected to a chassis that contains ten modules. The three tree levels are described in the following table. Module Tree Level Description Local (System 0)
  • Page 70 LCI Module Tree Overview, Continued Module Information Information about a module (its parameters, alarms and statuses) is located in the Module Details window. Within the module tree, you can access this window using one of the following four methods: • Double-click the chassis and select the module in the graphic that displays •...
  • Page 71 Information about a module (its parameters, alarms and statuses) is located in the Module Details window. The graphic below shows the Module Details window for a Prisma II Reverse Data Receiver. Within LCI’s module tree, you can access this window using one of the following four methods: •...
  • Page 72 Accessing the Module Details Window, Continued Double-Click the Chassis To access the Module Details window, follow these steps. Double-click the chassis. Result: A graphic representation of the chassis displays. 4-14 Operation Using LCI 78-713378-01 Rev C...
  • Page 73 Accessing the Module Details Window, Continued Double-click the module whose information you want to view and/or configure. Result: The Module Details window displays. Proceed with viewing and/or configuring information. 78-713378-01 Rev C Operation Using LCI 4-15...
  • Page 74 Accessing the Module Details Window, Continued Right-Click the Chassis To access the Module Details window, perform these steps. Right-click the chassis, and click Open. Result: A graphic representation of the chassis displays. 4-16 Operation Using LCI 78-713378-01 Rev C...
  • Page 75 Accessing the Module Details Window, Continued Double-click the module whose information you want to view and/or configure. Result: The Module Details window displays. Proceed with viewing and/or configuring information. 78-713378-01 Rev C Operation Using LCI 4-17...
  • Page 76 Accessing the Module Details Window, Continued Double-Click the Module To access the Module Details window, perform these steps. Double-click the module. Result: The Module Details window displays. Proceed with viewing and/or configuring information. 4-18 Operation Using LCI 78-713378-01 Rev C...
  • Page 77 Accessing the Module Details Window, Continued Right-Click the Module To access the Module Details window, perform these steps. Right-click the module, and click Details. Result: The Module Details window displays. Proceed with viewing and/or configuring information. 78-713378-01 Rev C Operation Using LCI 4-19...
  • Page 78 Checking the Operating Status Introduction Using LCI, you can check the status of all operating parameters of the Prisma II Reverse Receiver. Monitored Parameters The table below describes the monitored parameters for this module. Parameter Function Operating Range Rx 1 Optical Input Displays optical input power -17.0 dBm to +2.0 dBm...
  • Page 79 Continued Checking the Operating Status To monitor the module operating parameters, follow these steps. In the module tree, right-click one of the Prisma II Reverse Receivers, and click Details. Result: The Module Details window displays. The monitored parameters are displayed under Parameters.
  • Page 80 Configuring the Reverse Receiver Introduction Using LCI, you can configure the parameters listed below. Configurable Parameters Configurable parameters for the Prisma II Reverse Receiver are listed below. Control Function Values Default Rx 1 Mute Force Mute. Muting of the RF signal and...
  • Page 81 Configuring the Reverse Receiver, Continued Configuring Parameters To configure the parameters, follow these steps. In the module tree, right-click one of the Prisma II Reverse Receivers, and click Details. Result: The Module Details window displays. 78-713378-01 Rev C Operation Using LCI...
  • Page 82 Configuring the Reverse Receiver, Continued Under Controls, double-click the parameter you want to configure. Result: The Change Value dialog box displays. The graphic below shows the dialog box for the Rx 1 Mute Switch parameter. Depending on the parameter you chose, select or type a new value. Click Execute.
  • Page 83 Checking Reverse Receiver Alarms Introduction Using LCI, you can check the alarm status of various parameters. Alarms that you can check are listed below. Major Minor Minor Major Operating High High Range Alarm Function Limit Limit Limit Limit Hysteresis Rx 1 Optical Optical -17.0 to +2.0 dBm Input Power...
  • Page 84 Continued Checking Alarms To check a parameter’s alarm status, perform these steps. Right-click one of the Prisma II Reverse Receivers, and click Details. Result: The Module Details window displays. The alarms are shown under Alarms. If any of the parameters are in alarm, take the corrective action you deem necessary.
  • Page 85 Modifying Reverse Receiver Alarm Limits Introduction Using LCI, you can modify alarm limits for several parameters. Parameters whose alarm limits you can change are listed below. Major Minor Minor Major Operating High High Range Alarm Function Limit Limit Limit Limit Hysteresis Rx 1 Optical Optical...
  • Page 86 Continued Modifying Alarm Limits To modify a parameter’s alarm limit, follow these steps. In the module tree, right-click one of the Prisma II Reverse Receivers, and click Details. Result: The Module Details window displays. The alarm limits are shown under Parameters.
  • Page 87 Modifying Reverse Receiver Alarm Limits, Continued Double-click the limit you want to change. Result: The Change Value dialog box displays. The graphic below shows the dialog box for the minor low limit of the Rx 1 Optical Input Power parameter. In the Command to box, type the value to use for the limit.
  • Page 88 Checking Manufacturing Data Introduction Using LCI, you can check the manufacturing data of the reverse receiver. Manufacturing Data The table below describes the manufacturing data available for this module. Manufacturing Data Typical Values Description Reverse Receiver Module Type 2001 Serial number 012345 Software Revision 6.05...
  • Page 89 Continued Checking Manufacturing Data To access the module’s manufacturing data, perform these steps. In the module tree, right-click one of the Prisma II Reverse Receivers, and click Details. Result: The Module Details window displays. The manufacturing data is displayed under Properties.
  • Page 90 Chapter 5 Maintenance and Troubleshooting Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma II Reverse Receiver. Qualified Personnel Only appropriately qualified and trained personnel should attempt to troubleshoot this product. WARNING: Allow only qualified personnel to install, operate, maintain, or service this product.
  • Page 91 Module Maintenance Maintaining the Prisma Module To ensure optimal performance, the following maintenance is recommended. Frequency Maintenance Required Weekly • Check all parameters and test points • Record data • Make adjustments as needed Quarterly • Make sure all cables are mated properly •...
  • Page 92 General Troubleshooting Information Introduction This troubleshooting information describes the most common alarms and gives typical symptoms, causes, and items to check before consulting Cisco. Equipment Needed You may need the following equipment to troubleshoot the chassis. • Digital voltmeter • Fiber connector cleaning materials...
  • Page 93 Repair or replace as needed. off. • Fan Tray cooling Troubleshoot the fans. fans are not Telephone Cisco Services for operating help. properly. PsOk Bus voltage Power supply faulty Check power supply...
  • Page 94 Chapter 6 Customer Information If You Have Questions If you have technical questions, call Cisco Services for assistance. Follow the menu options to speak with a service engineer. Access your company's extranet site to view or order additional technical publications.
  • Page 95 Glossary Term, Acronym, Meaning Abbreviation Ampere (amp) is the unit of measure for electrical current. Alternating current The ability to control an individual unit in a system of Addressable many similar units. Automatic Frequency Control Automatic Gain Control Amplitude Modulation Two or more amplifiers in a series, the output of one Amplifier Cascade feeding the input of another.
  • Page 96 Glossary , Continued BERT Bit error rate test Broadband Integrated Gateway BIOS Basic Input/Output System BIST Built-in self-test Short for Binary Digit. Can be either a "one" or a "zero." Blanking level The amplitude of the front and back porches of the composite video signal.
  • Page 97 Glossary , Continued Compression The non-linear change of gain at one level of a signal with respect to the change of gain at another level for the same signal. Also, the elimination of redundant information from an audio, data, or video signal to reduce transmission requirements.
  • Page 98 Glossary , Continued Distribution System Part of a cable system consisting of trunk and feeder cables used to carry signals from headend to subscriber terminals. A device that converts an input signal to a lower frequency Downconverter output signal. Down link A transmission path carrying information from a satellite or spacecraft to earth.
  • Page 99 Glossary , Continued FAOC Frequency agile output converters Field-effect transistor FIFO First in, first out Frequency modulation Forward path Signal direction from the headend to the set-top terminal. Fabry-Perot laser A single strand of glass used as an optical transmission Fiber medium;...
  • Page 100 Glossary , Continued Headend Location and equipment that receives data from a satellite (or other) source and reformats that data for input to a broadband distribution network HEDA Headend Driver Amplifier High Gain Dual A unit of frequency equal to one cycle per second. Hertz Hetrodyne Changing the frequency of a signal by mixing it with...
  • Page 101 Glossary , Continued Low-noise converter LOCATE(TM) Systems for monitoring, analyzing, or reporting electric power outages Mbps Megabits per second Master Control Unit Multipath (multipath The phenomenon which results from a signal traveling transmission) from point to point by more than one path so that several copies of the signal arrive at the destination at different times or at different angles.
  • Page 102 Glossary , Continued Quadrature Phase-Shift Keying QPSK Reverse conditioner Signal flow direction toward the headend. Reverse path Radio frequency RF Bypass A bypass feature that allows subscribers to view a clear analog channel while recording a digital or analog channel on a VCR.
  • Page 103 Glossary , Continued SNMP Simple Network Management Protocol Splitter. It is a device which divides power from an input to deliver multiple outputs or combines multiple inputs into one output. Spread Spectrum A modulation technique to spread a narrow band signal over a wide band of frequencies.
  • Page 104 Glossary , Continued Voltage controlled attenuator V DC Volts direct current Video-on-demand Volt ohm meter Watts Wave Division Multiplexing Ytterbium/Erbium Doped Fiber Amplifier YEDFA Glossary-10 Optoelectronic Glossary 78-713378-01 Rev C...
  • Page 106 This document includes various trademarks of Cisco Systems, Inc. Please see the Notices section of this document for a list of the Cisco Systems, Inc. trademarks used in this document. Product and service availability are subject to change without notice.