Prisma® and Prisma II™ Platform Maintenance and Troubleshooting
Please Read This Entire Guide Important Please read this entire guide before you install or operate this product. Give particular attention to all safety statements.
Prisma® and Prisma II™ Platform Maintenance and Troubleshooting
Notices Trademark Acknowledgments • “Bringing the Interactive Experience Home”, Prisma II, and SciCare are trademarks of Scientific-Atlanta Inc. • Scientific-Atlanta, the Scientific-Atlanta logo, and Prisma are registered trademarks of Scientific-Atlanta, Inc. • All other trademarks shown are trademarks of their respective owners. Publication Disclaimer Scientific-Atlanta, Inc., assumes no responsibility for errors or omissions that may appear in this publication.
Contents Safety Precautions ...................................................................................................................................... x Laser Safety ...............................................................................................................................................xii Preface.......................................................................................................................................................
Contents, Continued Section D Prisma II Targeted Service Delivery Transmitter Overview......................................................................................................................1-61 Monitor Alarm Parameters Using the ICIM ...........................................................1-62 General Troubleshooting Information .....................................................................1-64 Troubleshoot Alarm Conditions............................................................
Contents, Continued Section G Prisma II 1550 nm Transmitters Overview....................................................................................................................1-103 Monitor Alarm Parameters Using the ICIM .........................................................1-104 Monitor Status Parameters Using the ICIM..........................................................1-107 Configure Parameters Using the ICIM ..................................................................
Contents, Continued Section C Prisma Model 6971-DR Dual Reverse Receiver Overview......................................................................................................................2-29 Monitor Alarm Parameters........................................................................................2-30 Monitor Status Parameters ........................................................................................2-33 Receiver Specifications ................................................
Contents, Continued Chapter 3 Optical Switches Overview........................................................................................................................3-1 Section A Prisma Model 6474 Optical Switches Overview........................................................................................................................3-2 Monitor Alarm Parameters..........................................................................................3-3 Monitor Status Parameters ...........
Contents, Continued Troubleshoot Alarm Conditions...............................................................................4-14 Amplifier Maintenance Schedule .............................................................................4-16 Fiber Optic Connector Cleaning Procedure ............................................................4-17 Section B Prisma Models 6476-22 and 6476-25 CLAD Optical Amplifiers Overview....................................................................................
Contents, Continued Chapter 5 Chassis Overview........................................................................................................................5-1 Section A Prisma Model 6470-R2 Chassis Overview........................................................................................................................5-2 Power Supply Specifications .......................................................................................5-3 General Troubleshooting Information ...............
Safety Precautions Protect Yourself From Electric Shock and Your System From Damage! • The products described in this document comply with international safety and design standards. Observe all safety procedures that appear throughout this guide, and the safety symbols that are affixed to the products. • If circumstances impair the safe operation of the products, stop operation and secure products against further operation.
Safety Precautions, Continued Safe Software Operation The software described in this guide is used to monitor and/or control ScientificAtlanta and other vendors’ electrical and optical equipment designed to transmit cable TV signals. Certain safety precautions should be observed when operating equipment of this nature. For product specific safety requirements, refer to the appropriate section of the documentation accompanying your product.
Laser Safety Introduction Each product described in this guide does one of the following: • Contains an infrared laser that transmits intensity-modulated light and emits invisible radiation • Connects to an infrared laser and can pass intensity-modulated light, which is considered to be invisible radiation Warning: Radiation WARNING: • Avoid personal injury! Use of controls, adjustments, or procedures other than those specified herein may result in hazardous radiation exposure.
Preface About This Guide Introduction This guide provides maintenance and troubleshooting information for the Prisma® and Prisma II™ platforms. Who Should Read This Guide This guide is intended for personnel who are responsible for operating and maintaining the platforms. WARNING: Only qualified personnel should perform the instructions provided in this guide. Otherwise, personal injury or equipment damage may result. In This Guide This guide is divided into the following chapters.
Chapter 1 Transmitters Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma® and Prisma II™ Transmitters. Qualified Personnel Only appropriately qualified and trained personnel should attempt to maintain or troubleshoot the transmitters described in this chapter. WARNING: Allow only qualified personnel to maintain or troubleshoot these transmitters. Otherwise, personal injury or equipment damage may occur.
Section A Prisma Model 6473 Forward Transmitters Overview Introduction The information in this section applies to the following Prisma Model 6473 Forward Transmitters: • Model 6473-NC Overlay Transmitter • Model 6473 870 MHz Family of Transmitters • Model 6473-10 750 MHz Transmitter • Model 6473-10 870 MHz Transmitter • Model 6473-12 750 MHz Transmitter In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the transmitter, you can determine whether there is an alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select through the active alarms. key on the transmitter to rotate Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. The following table shows the values displayed on the ALARMS screen for out-ofrange errors or a failure.
Monitor Alarm Parameters, Continued Monitoring Alarm Parameters for Models 6473-NC Overlay and 750 MHz Forward Transmitters The following table describes each alarm parameter for the Model 6473-NC Overlay and Model 6473 750 MHz Forward Transmitters.
Monitor Alarm Parameters, Continued 6473-NC Overlay Transmitter 6473-10 750 MHz Transmitter 6473-12 750 MHz Transmitter Status Alarm Indicator Status Alarm Indicator Status Alarm Indicator D5Vdc HIGH: 5.25 V Illuminates HIGH: 5.25 V Illuminates HIGH: 5.25 V Illuminates (+5 V DC digital power level) LOW: Below 4.75 V Illuminates LOW: Below 4.75 V Illuminates LOW: Below 4.75 V Illuminates HIGH: Above 5.50 V Illuminates HIGH: Above 5.50 V Illuminates HIGH: Above 5.
Monitor Alarm Parameters, Continued Monitoring Alarm Parameters for Model 6473 870 MHz Forward Transmitters The following table describes each alarm parameter for the Model 6473 870 MHz Forward Transmitters. 6473 870 MHz Transmitter 6473-10 870 MHz Transmitter Status Alarm Indicator Status Alarm Indicator OK Off OK Off FAILED Illuminates FAILED Illuminates HIGH: More than 0.5 dBm above nominal Blinks HIGH: More than 10.5 dBm Blinks LOW: More than 0.
Monitor Alarm Parameters, Continued 6473 870 MHz Transmitter 6473-10 870 MHz Transmitter Status Alarm Indicator Status Alarm Indicator D5Vdc HIGH: 5.25 V Illuminates HIGH: 5.25 V Illuminates (+5 V DC digital power level) LOW: Below 4.75 V Illuminates LOW: Below 4.75 V Illuminates A5Vdc HIGH: Above 5.50 V Illuminates HIGH: Above 5.50 V Illuminates LOW: Below 4.50 V Illuminates LOW: Below 4.50 V Illuminates HIGH: Above –5.50 V Illuminates HIGH: Above –5.
Monitor Status Parameters Introduction From the STATUS screen on the transmitter, you can check various parameters to verify the status of the transmitter.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following transmitter information: • Laser power in dBm • Laser bias current in mA • SMC ID of the transmitter When in the summary STATUS screen, press the Select to rotate through the remaining parameters.
Monitor Status Parameters, Continued Monitoring Status Parameters The following table describes each status parameter. Parameter 6473-NC Overlay Transmitter 6473-10 750 MHz Transmitter 6473-12 750 MHz Transmitter 6473 870 MHz Transmitter 6473-10 870 MHz Transmitter 0.0 dBm to +16.0 dBm 0.0 dBm to +16.0 dBm 0.0 dBm to +16.0 dBm 0.0 dBm to +16.0 dBm 0.0 dBm to +16.
Monitor Status Parameters, Continued Parameter Mtemp (Transmitter temperature) 6473-NC Overlay Transmitter 6473-10 750 MHz Transmitter 6473-12 750 MHz Transmitter 6473 870 MHz Transmitter 6473-10 870 MHz Transmitter 0°.0C to 108.0°C 0.0°C to 108.0°C 0.0°C to 108.0°C 0.0°C to 108.0°C 0.0°C to 108.0°C 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.81 V DC 0 V DC to +10.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitters • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitters: • Digital voltmeter • Spectrum analyzer • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Test the Power and Communications Connector Introduction During troubleshooting, you may need to test the power and communications connector. The following pages: • Explain how to locate the connector on the transmitter • Describe the connector pins Locating the Power and Communications Connector Use the following diagram to locate the connector. Then, refer to the pin-out diagram on the following page to assist you in troubleshooting.
Test the Power and Communications Connector, Continued Connector Pin-Out Key Refer to the following illustration and table when troubleshooting the following functions: • Power • Alarm • Status monitoring 50 49 48 47 46 45 44 43 42 41 40 39 38 37 14 13 12 11 10 9 8 7 6 5 4 3 2 1 T5185 Continued on next page 4000326 Rev A Transmitters 1-15
Test the Power and Communications Connector, Continued Description Transmitters: Pin No.
Test the Power and Communications Connector, Continued Description Transmitters: Pin No.
Troubleshoot Alarm Conditions Introduction The following tables provide information about transmitter and power supply alarms. If the amber FAULT indicator is illuminated or blinking, check the transmitter display to determine the cause of the alarm. Troubleshooting Transmitter Alarms The following table shows the possible causes of transmitter alarms and their solutions. Note: The Laser Temperature parameter is not available in the 6473-NC Overlay transmitter.
Troubleshoot Alarm Conditions, Continued Alarm RF level Status High or Low Possible Causes RF level at the input is out of specification. Ambient temperature is too high due to: Module temperature Mtemp High Possible Solutions Verify the RF input is within tolerance. Repair or adjust as needed. Diagnose the problem and repair or replace as needed. • A failure in the temperature control system. • Airflow through the rack has been restricted or cut off.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply Alarms The following table shows the possible causes of power supply alarms and their solutions. Alarm • +5 V DC analog power • +5 V DC digital power • -5 V DC digital power • +15 V DC digital power • +24 V DC digital power Status High or Low Possible Causes Possible Solutions Loose, unplugged, or damaged power cords. Check the power supply power cord and connections. No AC at receptacle. Check receptacle for AC power.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section B Prisma Model 6473-R Reverse Transmitter Overview Introduction The information in this section applies to the Prisma Model 6473-R Reverse Transmitter. In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the transmitter, you can determine whether there is a transmitter alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select through the active alarms. key on the transmitter to rotate Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. The following table shows the values displayed on the ALARMS screen for out-ofrange errors or a failure.
Monitor Alarm Parameters, Continued Monitoring Alarm Parameters The following table describes each alarm parameter. Parameter 4000326 Rev A Meaning Values Alarm Indicator OK Off FAILED Illuminates HIGH Blinks LOW Illuminates HIGH Blinks LOW Illuminates HIGH Off LOW Illuminates HIGH Off LOW Illuminates HIGH: Above 100.0°C Blinks HIGH: 5.25 V Illuminates LOW: Below 4.75 V Illuminates HIGH: Above 5.50 V Illuminates LOW: Below 4.50 V Illuminates HIGH: Above -5.
Monitor Status Parameters Introduction From the STATUS screen on the transmitter, you can check various parameters to verify the status of the transmitter.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following transmitter information: • Laser power in dBm • Laser bias current in mA • SMC ID of the transmitter When in the summary STATUS screen, press the Select to rotate through the remaining parameters.
Monitor Status Parameters, Continued Monitoring Status Parameters The following table describes each status parameter. Parameter Meaning Operating Range Summary STATUS Screen: 1-30 • Power Laser power • Bias Laser bias current • ID SMC ID +18.0 dBm to -3.0 dBm +18.0 mA to -3.0 mA Programmable 0001 to 65535 Power Laser power +18.0 dBm to -3.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitter • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitter: • Digital voltmeter • Spectrum analyzer Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following tables provide information about transmitter and power supply alarms. If the amber FAULT indicator is illuminated or blinking, check the transmitter display to determine the cause of the alarm. Troubleshooting Transmitter Alarms The following table shows the possible causes of transmitter alarms and their solutions. Alarm Status OK Possible Causes Possible Solutions No alarms. No action required.
Troubleshoot Alarm Conditions, Continued Alarm RF level Status High or Low Possible Causes RF level at the input is out of specification. Ambient temperature is too high due to: Module temperature Mtemp High Possible Solutions Verify the RF input is within tolerance. Repair or adjust as needed. Diagnose the problem and repair or replace as needed. • A failure in the temperature control system. • Airflow through the rack has been restricted or cut off.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply Alarms The following table shows the possible causes of power supply alarms and their solutions. Note: Some or all of the steps will cause a service interruption. Alarm • Status +5 V DC analog power • +5 V DC digital power • -5 V DC digital power • +15 V DC digital power • +24 V DC digital power High or Low Possible Causes Possible Solutions Loose, unplugged, or damaged power cords.
Troubleshoot Alarm Conditions, Continued Alarm Backplane power supply status (primary and secondary) Status Possible Causes The power supply status is: PSPri or PSsec Fail • Reported as in alarm • Not reported at all Possible Solutions • Verify that the transmitter is securely seated in the chassis. • Verify the operation of the power supplies. If they are functioning properly and no power supply related alarms are reported on any module in the chassis, the chassis may have a problem.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1-38 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section C Prisma Model 6475 Transmitters Overview Introduction The information in this section applies to the following Prisma Model 6475 Transmitters: • Model 6475-9 CEMT 1550 nm Externally Modulated Transmitter • Model 6475L EMT 1550 nm Externally Modulated Transmitter • Model 6475Q 1550 nm Forward Transmitter • Model 6475R ITU 1550 nm Externally Modulated Transmitter • Model 6475S Gap Bridger 1550 nm Externally Modulated Transmitter In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the transmitter, you can determine whether there is a transmitter alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select through the active alarms. key on the transmitter to rotate Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. Alarm Parameters The following table describes each alarm parameter.
Monitor Alarm Parameters, Continued Parameter 1-42 Meaning Description Lock2 PLL lock status The PLL lock status for SBS synthesizer 2 has failed. KeySw Key switch position The key switch is in the OFF position. Ltemp Laser temperature The laser temp is not between 20°C and 30°C. Mtemp Module temperature The module temperature is above 100.0°C. A5Vdc +5 V DC analog power level The +5 V DC power level for analog circuitry is outside its normal range.
Monitor Status Parameters Introduction From the STATUS screen on the transmitter, you can check various parameters to verify the status of the transmitter.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following transmitter information: • Laser power in dBm • Laser bias current in mA • SMC ID of the transmitter When in the summary STATUS screen, press the Select to rotate through the remaining parameters. key on the transmitter Status Parameters The following table describes each status parameter.
Monitor Status Parameters, Continued Parameter 4000326 Rev A Meaning Description D5Vdc +5 V DC digital +5 V DC supply for digital circuitry status A5Vdc +5 V DC +5 V DC supply for analog circuitry status -5Vdc -5 V DC -5 V DC supply status 15Vdc +15 V DC +15 V DC internal supply status 24Vdc +24 V DC +24 V DC supply status PSpri Power supply Primary backplane power supply status PSsec Power supply Secondary backplane power supply status Transmitters 1-45
Transmitter Specifications Introduction The specifications listed in the following tables can be useful when troubleshooting the transmitters. Model 6475-9 CEMT 1550 nm Externally Modulated Transmitter Power Requirements Parameter Power supply Power consumption Values • Model 6470 (Rev 2) Chassis • Model 6471 Power Supply Maximum: 45 watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +40.
Transmitter Specifications, Continued RF Electrical Characteristics Parameter RF input levels Return loss Values + 24.0 dBm V/channel • 16.0 dB (45–550 MHz) • 14.0 dB (550–865 MHz) Bandwidth 45–870 MHz Frequency response ± 0.9 dB Performance Characteristics Note: CNR is specified for 78 unmodulated NTSC channels with 3 dBm received power at the detector. CNR for other channel plans will differ slightly from this. All measurements are made using E-2000 connectors.
Transmitter Specifications, Continued Model 6475L EMT 1550 nm Externally Modulated Transmitter Power Requirements Parameter Power supply Power consumption Values • Model 6470 (Rev 2) Chassis • Model 6471 Power Supply Maximum: 45 watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +40.
Transmitter Specifications, Continued RF Input Levels Note: 0.0 dBm V is equivalent to the power associated with 1 mV across a 75-ohm load. Power Per Channel (dBm V) Model Number Channel Load Minimum Nominal Maximum 6475-6n80 77 NTSC 24.5 27.0 29.5 6475-6n110 110 NTSC 22.5 25.0 27.5 6475-6 42 Cenelec 27.0 29.5 32.0 60 PAL B/G 25.5 28.0 30.5 42 Cenelec 23.0 25.5 28.
Transmitter Specifications, Continued Model 6475Q 1550 nm Forward Transmitter Power Requirements Parameter Power supply Power consumption Values • Model 6470 (Rev 2) Chassis • Model 6471 Power Supply Maximum: 25 watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +50.0°C Storage temperature -25.0°C to +70.0°C Humidity Maximum: 20% to 80%, non-condensing Optical Characteristics Parameter Available wavelengths (± 0.
Transmitter Specifications, Continued RF Electrical Characteristics Parameter Values Channel loading 16 NTSC RF drive per channel 22 ± 1.5 dBm V Return loss (for 45–870 MHz) Minimum: 14 dB Output power Frequency range • +3.0 dBm (external mod) • +8.0 dBm (direct mod) • +10.0 dBm (direct mod) 5–200 MHz Performance Characteristics Note: CNR is specified for 5–40 MHz with notch at 22 MHz. Parameter Values CNR Minimum: 50 dB CSO Maximum: -60.0 dBc CTB Maximum: -60.
Transmitter Specifications, Continued Model 6475R ITU 1550 nm Externally Modulated Transmitter Power Requirements Parameter Power supply Power consumption Values • Model 6470 (Rev 2) Chassis • Model 6471 Power Supply Maximum: 45 watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +50.0°C Storage temperature -25.0°C to +70.0°C Humidity Maximum: 20% to 80%, non-condensing Optical Characteristics Parameter Available wavelengths (± 0.
Transmitter Specifications, Continued RF Electrical Characteristics Parameter Values RF drive levels -40.0 to –56.0 dBm V/Hz Return loss Minimum: 14.0 dB Output power +7.0 to +9.5 dBm Frequency range 5–200 MHz Performance Characteristics Note: CNR is specified for 5–40 MHz with notch at 22 MHz. Parameter CNR Values • Minimum: 43.0 dB • Typical: 46.0 dB Spurious noise Minimum: 60.0 dBc Flatness (5–200 MHz) ± 0.75 dB Slope (5–200 MHz) +0.50 dB to +1.
Transmitter Specifications, Continued Model 6475S ITU 1550 nm Externally Modulated Transmitter Power Requirements Parameter Power supply Power consumption Values • Model 6470 (Rev 2) Chassis • Model 6471 Power Supply • Typical: 25 watts • Maximum: 35 watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +50.0°C Storage temperature -30.0°C to +80.
Transmitter Specifications, Continued RF Electrical Specifications Parameter Values RF input levels +22 ± 3 dBm V/channel Return loss 16.0 dB Response flatness • ± 0.5 dB (45–550 MHz) • ± 0.75 dB (550–865 MHz) Bandwidth 45–870 MHz Frequency response ± 0.5 dB Performance Specifications Note: CNR is specified for 78 unmodulated NTSC channels with 0 dBm received power at the detector. CNR for other channel plans will differ slightly from this. All measurements are made using E-2000 connectors.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitter • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitter: • Digital voltmeter • Spectrum analyzer • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to transmitter alarm conditions. Troubleshooting Alarms Refer to the following table for troubleshooting assistance. Alarm Condition Possible Causes Power connection is loose. Secure all power connections and the line cord. AC power failure. Check other displays for power indication. AC power is off Module indicator is burned out.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1-60 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section D Prisma II Targeted Service Delivery Transmitter Overview Introduction The information in this section applies to the Prisma II Targeted Service Delivery (TSD) Transmitter. Note: For information about monitoring the Prisma II High Density Chassis, refer to Chapter 5, Chassis. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the TSD Transmitter. Transmitter Status LED Description The Status LED located on the transmitter’s front panel illuminates or blinks to indicate the state of the transmitter. If the Status LED is illuminated red or blinking red, an alarm has been generated.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Transmitter Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Targeted Service Transmitter MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each transmitter alarm parameter. Parameter OutPwr LasTemp 4000326 Rev A Meaning Values Possible Solutions to Alarm • OK Internal problem.
General Troubleshooting Information Introduction Because the main function of the chassis is to distribute power and establish communication links for the modules installed in the chassis, most troubleshooting involves the modules that are installed in the chassis. However, in some instances, you may need to troubleshoot the chassis. Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to transmitter alarm conditions. Troubleshooting Transmitter Alarms The following table shows the possible solutions to transmitter alarms. Parameter OutPwr LasTemp 4000326 Rev A Meaning Optical output power Laser temperature Values Possible Solutions • OK Internal problem. • Minor alarm • Major alarm Telephone the Scientific-Atlanta assistance center in your area for assistance.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1-68 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section E Prisma II 1310 nm Forward Transmitter Overview Introduction The information in this section applies to the Prisma II 1310 nm Forward Transmitter. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the transmitter. Transmitter Alarm LED Description The Alarm LED located on the transmitter’s front panel illuminates or blinks to indicate the state of the transmitter. The following table shows each possible transmitter state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Forward Transmitter MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each transmitter alarm parameter. Parameter Meaning InRF RF input level OutPwr Optical output power CwMode CW mode Values -4.5 dB to +3.0 dB Possible Solutions to Alarm RF source or cables. Internal problem. ±0.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Forward Transmitter MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each transmitter status parameter.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several transmitter parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Forward Transmitter MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the transmitter.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the transmitter. Alarm Information The following transmitter alarm information is available: • RF input level • Optical output power • Continuous wave mode • Laser temperature • Laser bias current • Laser on/off status • Bus voltage status Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the transmitter (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each transmitter alarm parameter. Parameter RF Input Power Meaning RF input level Values -4.5 dB to +3.0 dB Possible Solutions to Alarm RF source or cables. Internal problem.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the transmitter. Modifying Alarm Parameters To modify the parameters, navigate to the Module Details window of the Transmitter (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified. Parameter 4000326 Rev A Meaning Values RF Input Power RF input level -4.5 to +3.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the transmitter (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each transmitter status parameter.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several transmitter parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the transmitter (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the transmitter.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitter • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitter: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to transmitter alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Alarm Status Possible Causes Failed Automatic power control circuit failure.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section F Prisma II 1310 nm Reverse Transmitter Overview Introduction The information in this section applies to the Prisma II 1310 nm Reverse Transmitter. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the transmitter. Transmitter Alarm LED Description The Alarm LED located on the transmitter’s front panel illuminates or blinks to indicate the state of the transmitter. The following table shows each possible transmitter state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Reverse Transmitter MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each transmitter alarm parameter. Parameter Meaning InRF RF input level OutPwr Optical output power CwMode CW mode Values -4.5 dB to +3.0 dB Possible Solutions to Alarm RF source or cables. Internal problem. ±0.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Reverse Transmitter MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each transmitter status parameter.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several transmitter parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1310 nm Reverse Transmitter MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the transmitter.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the transmitter. Alarm Information The following transmitter alarm information is available: • Laser temperature • Laser bias current • RF input level • Optical output power • Power supply status Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the Transmitter (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each transmitter alarm parameter. Parameter Meaning Values Possible Solutions to Alarm Internal problem. Laser Temperature Laser temperature 20.0°C to 30.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the transmitter. Modifying Alarm Parameters Modifiable alarm parameters are located under the Parameters heading of the Transmitter Module Details window. The following table shows parameters with alarm limits that can be modified. Parameter 1-94 Meaning Values RF Input Power RF input level -4.5 to +3.0 dB Optical Output Power Optical output power ±0.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the transmitter (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each transmitter status parameter.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several transmitter parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the transmitter (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the transmitter. Parameter Description Values RF Drive Setting Sets the relative RF drive level into the transmitter. -1.5 dB to +1.5 dB in 0.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitter • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitter: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to transmitter alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Alarm InRF OutPwr CWMode Range Possible Solutions -4.5 dB to +3.0 dB RF source or cables. Internal problem. ±0.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1-102 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section G Prisma II 1550 nm Transmitters Overview Introduction The information in this section applies to the following Prisma II 1550 nm Transmitters: • Externally-Modulated Broadcast Transmitter • Gap Bridger Externally-Modulated Broadcast Transmitter • QAM Transmitter In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the transmitter. Transmitter Status LED Description The Alarm LED located on the transmitter’s front panel illuminates or blinks to indicate the state of the transmitter. The following table shows each possible transmitter state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1550 nm Transmitter MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each transmitter alarm parameter. Parameter Meaning Typical Range Possible Solutions to Alarm Internal problem. LasBias Laser bias 50 to 100 mA LasTemp Laser temperature 20.0°C to 35.0°C ModTemp Module temperature -40.
Monitor Alarm Parameters Using the ICIM, Continued Parameter 1-106 Meaning Typical Range Fault Possible Solutions to Alarm Check module seating and chassis power supply. PsOk Power supply TxEnable Laser off CwMode Continuous wave mode -5VInt -5 V power level -5 V high or low Internal problem. -12VInt -12 V power level -12 V high or low +12VInt +12 V power level +12 V high or low Telephone the ScientificAtlanta assistance center in your area for assistance.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1550 nm Transmitter MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each transmitter status parameter. Parameter Units Meaning Typical Value OutPwr1 dBm Optical output power at port 1 +9.0 dBm OutPwr2 dBm Optical output power at port 2 +9.
Monitor Status Parameters Using the ICIM, Continued Parameter -12VInt 4000326 Rev A Units V Meaning Internal -12 V power level Typical Value -12 V LasMode N/A Constant current AGC N/A Automatic gain control Off Master N/A Master/slave operation Master RFDrive dB RF drive level Span km Link distance or span OMISet dB Optical modulation index Transmitters ConstCur 0 dB 35 km 0 dB 1-109
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several transmitter parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II 1550 nm Transmitter MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the transmitter. Parameter Enable Description Enables or disables the laser.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the transmitter.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the transmitter (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each transmitter alarm parameter. Parameter Typical Range Possible Solutions to Alarm Internal problem. Laser Bias 50 to 100 mA Laser Temperature 20.0°C to 35.0°C Module Temperature -40.0°C to 85.
Monitor Alarm Parameters Using LCI, Continued Parameter Laser Enabled Status Typical Range • Enable • Disable SBS 2 GHz PLL SBS 6 GHz PLL Constant Power Loop Locked 4000326 Rev A Possible Solutions to Alarm Laser disabled. Internal problem. • Lock • Unlock Transmitters Telephone the Scientific-Atlanta assistance center in your area for assistance.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the transmitter. Modifying Alarm Parameters Modifiable alarm parameters are located under the Parameters heading of the Transmitter Module Details window. The following table shows parameters with alarm limits that can be modified. Parameter Laser Bias Laser Temperature Module temperature 50 to 100 mA 20.0°C to 30.0°C -40.0°C to +65.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the transmitter. Status Information The following transmitter status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the Transmitter (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each transmitter status parameter. Parameter RF Input 1-116 Units dB Meaning Relative RF input power Typical Value 0 dB Output Power 1 dBm Optical output power at port 1 +9.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several transmitter parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the Transmitter (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the transmitter.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the transmitter • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the transmitter: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to transmitter alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Parameter Typical Range Possible Solutions Internal problem. 50 to 100 mA Laser Temperature 20.0°C to 35.
Transmitter Maintenance Schedule Introduction Regular maintenance is required to extend the life of the transmitter and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1-122 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Chapter 2 Receivers Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma® and Prisma II™ Receivers. Qualified Personnel Only appropriately qualified and trained personnel should attempt to maintain or troubleshoot the receivers described in this chapter. WARNING: Allow only qualified personnel to maintain or troubleshoot these receivers. Otherwise, personal injury or equipment damage may occur.
Section A Prisma Model 6971-SF Single Forward Receiver Overview Introduction The information in this section applies to the Prisma Model 6971-SF Single Forward Receiver. In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the receiver, you can determine whether there is a receiver alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select the active alarms. key on the receiver to rotate through Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. The following table shows the values displayed on the ALARMS screen for out-ofrange errors or a failure.
Monitor Alarm Parameters, Continued Monitoring Alarm Parameters The following table describes each alarm parameter.
Monitor Status Parameters Introduction From the STATUS screen on the receiver, you can check various parameters to verify the status of the receiver.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following receiver information: • Received optical power level in dBm • SMC ID of the receiver When in the summary STATUS screen, press the Select rotate through the remaining parameters.
Monitor Status Parameters, Continued Monitoring Status Parameters The following table describes each status parameter. Parameter Meaning Operating Range Summary STATUS Screen: • Popt Received optical power level • ID SMC ID of the module Popt Inhbd -3.0 dBm to +3.0 dBm Programmable 0001 to 65,535, except 9999 Received optical power status OK, HIGH or LOW Received optical power level -3.0 dBm to +3.
Monitor Status Parameters, Continued Parameter Meaning Values OK, HIGH or LOW -5Vdc -5 V backplane power level 15Vdc +15 V control card power level 24Vdc +24 V backplane power level PsPri Primary backplane power supply status OK or FAIL PsSec Secondary backplane power supply status OK or FAIL 4000326 Rev A Receivers 0 V DC to +9.8 V DC OK, HIGH or LOW 0 V DC to +32.42 V DC OK, HIGH or LOW 0 V DC to +51.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the receiver • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the receiver: • Digital voltmeter • Spectrum analyzer Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to the following types of alarm conditions: • Connections and loss of power • Receiver • Power supply Troubleshooting Connections and Loss of Power If the RX FAULT indicator is off, refer to the following table to restore power. Alarm Condition RX FAULT indicator is off. Possible Causes Possible Solutions The power supply connection may be loose. Verify that all power supply connections are secure.
Troubleshoot Alarm Conditions, Continued Troubleshooting Receiver Alarms The following table shows the possible causes of receiver alarms and their solutions. Alarm Condition Status OK Software Self Test Received Optical power Hybrid Current Draw Possible Causes No alarms. No action required. One or more power supply voltages are out of specification. Refer to Troubleshooting Power Supply Alarms later in this section. Optical input level is out of specification.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply Alarms The following table shows the possible causes of power supply alarms and their solutions. Note: Some or all of the steps will cause a service interruption. Alarm • Status +5 V DC Analog Power • +5 V DC Digital Power • -5 V DC Digital Power • +15 V DC Digital Power • +24 V DC Digital Power High or Low Possible Causes Possible Solutions Loose, unplugged, or damaged power cords.
Troubleshoot Alarm Conditions, Continued Alarm Backplane Power Supply Status (Primary and Secondary) 2-14 Status Possible Causes The power supply status is: PSPri or PSsec Fail • Reported as in alarm • Not reported at all Receivers Possible Solutions Verify the operation of the power supplies. If they are functioning properly and no power supply related alarms are reported on any module in the chassis, the chassis may have a problem.
Receiver Maintenance Schedule Introduction Regular maintenance is required to extend the life of the receiver and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section B Prisma Model 6971-HP High Power Receiver Overview Introduction The information in this section applies to the Prisma Model 6971-HP High Power Receiver. In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the receiver, you can determine whether there is a receiver alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued Alarm Parameters The following table describes each alarm parameter. Parameter Meaning Description No Alarms No alarms No alarms are active. Self Test Self test Software self test failed. POpt Received optical power Input optical power is outside the required range. The amount of current drawn by the hybrid RF amplifier. Ihybd Low or high hybrid current indicates a possible hybrid failure, requiring the amplifier to be repaired.
Monitor Status Parameters Introduction While viewing the STATUS screen on the receiver, you can press the Select on the receiver to check various parameters.
Monitor Status Parameters, Continued Status Parameters The following table describes each status parameter. Parameter Meaning Description POpt Received optical power Input optical power ID, status, and power level. Ihybd Hybrid current draw Low or high hybrid current indicates a possible hybrid failure, requiring the amplifier to be repaired. Contact Scientific-Atlanta for hybrid repair. For instructions, refer to Chapter 6, Customer Information.
Receiver Specifications Introduction The specifications listed in the following tables can be useful when troubleshooting the receivers. Power Requirements Parameter Voltage Values • -5, +5, and +24 V DC • Model 6470-R2 Chassis Power Maximum: 15 watts Current Maximum: • -5 V DC: 10 mA • +5 V DC: 235 mA • +24 V DC: 565 mA Environmental Specifications Parameter Values Operating temperature 0.0°C to +40.0°C Storage temperature -40.0°C to +70.
Receiver Specifications, Continued Optical Specifications Parameter Values Bandwidth 50–870 MHz Frequency response ± 1.0 dB Return loss, RF ports • ≥ 16 dB (50–550 MHz) • ≥ 16–3fGHZ dB (f > 550 MHz) • 1290–1330 nm • 1530–1570 nm • 1310 nm: 0.75 A/W minimum • 1550 nm: 0.90 A/W minimum Wavelength Responsivity Fiber type Single mode, 9/125 µm Electrical Specifications Parameter CSO 2-24 Values -70.0 dBc at +3.0 dB opt.
General Troubleshooting Information Introduction If you experience a receiver alarm condition, verify that the receiver is properly seated. If the condition persists, contact a Scientific-Atlanta assistance center in your area. Refer to Chapter 6, Customer Information, for a listing of assistance centers and their telephone numbers. Troubleshooting Precautions Before troubleshooting the receivers, take note of the following warnings.
Receiver Maintenance Schedule Introduction Regular maintenance is required to extend the life of the receiver and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 2-28 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section C Prisma Model 6971-DR Dual Reverse Receiver Overview Introduction The information in this section applies to the Prisma Model 6971-DR Dual Reverse Receiver. In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the receiver, you can determine whether there is a receiver alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select the active alarms. key on the receiver to rotate through Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. Alarm Parameters The following table describes each alarm parameter.
Monitor Alarm Parameters, Continued Parameter Meaning 15Vdc +15 V DC power level 24Vdc +24 V DC power level Primary and secondary power supplies. 2-32 • PSPri • PsSec Note: If only one power supply fails, the ALARMS screen displays OK for the other power supply. One power supply is adequate to power a fully loaded chassis. Receivers Values HIGH: Above 16.50 V LOW: Below 13.50 V HIGH: Above 25.20 V LOW: Below 22.
Monitor Status Parameters Introduction From the STATUS screen on the receiver, you can check various parameters to verify the status of the receiver.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following receiver information: • Received optical power level in dBm for RX 1 and RX 2 • SMC ID of the receiver When in the summary STATUS screen, press the Select rotate through the remaining parameters.
Monitor Status Parameters, Continued Monitoring Status Parameters The following table describes each status parameter. Parameter Meaning Values Summary STATUS Screen: • POpt1 Received optical power for RX 1 -3.0 dBm to +3.0 dBm • POpt2 Received optical power for RX 2 -3.0 dBm to +3.0 dBm • ID SMC ID of the module POpt1 POpt2 • Gain1 • Gain2 0000 to 65,535 Received optical power status for RX 1. OK, HIGH or LOW Received optical power level for RX 1. -17.0 dBm to 0.
Monitor Status Parameters, Continued Parameter Meaning Values Popt1 LOW RX 1 has a low optical power level (-3.0 dB from nominal). External The external backup signal is active. Path B/UP SMC CTRL Receiver path status (backup mode) The SMC Set Control Byte command has temporarily placed the receiver in backup mode. Unknown Cause for backup mode cannot be determined. 2-36 • WvLn1 • WvLn2 Configured wavelength for RX 1 and RX 2.
Receiver Specifications Introduction The specifications listed in the following tables can be useful when troubleshooting the receivers. Environmental Specifications Parameter Temperature range Values Operational: 0.0°C to 40.0°C Nominal: 20.0°C to 30.
Receiver Specifications, Continued RF Output Specifications Notes: • RF output level is specified for video carrier level with –17.0 dBm received optical power, 15 percent modulation index per channel, and four NTSC CW carriers. • CNR, CSO, and CTB are referenced to a video carrier level. Measured with –3.0 dBm received optical power, 4 percent modulation index per channel, four NTSC CW carriers, and 512 QPSK channels.
General Troubleshooting Information Introduction If you experience a receiver alarm condition, verify that the receiver is properly seated. If the condition persists, contact a Scientific-Atlanta assistance center in your area. Refer to Chapter 6, Customer Information, for a listing of assistance centers and their telephone numbers. Troubleshooting Precautions Before troubleshooting the receivers, take note of the following warnings.
Receiver Maintenance Schedule Introduction Regular maintenance is required to extend the life of the receiver and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 2-42 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section D Prisma II Forward Receiver Overview Introduction The information in this section applies to the Prisma II Forward Receiver. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the receiver. Receiver Alarm LED Description The Alarm LED located on the receiver’s front panel illuminates or blinks to indicate the state of the receiver. The following table shows each possible receiver state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Forward Receiver MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each receiver alarm parameter. Parameter Meaning Optical power level InPwr Alarm Condition Type Typical Range Optical power = > 1.5 dBm or < -1.5 dBm Minor Optical power = > 2.0 dBm, < -2.0 dBm Major Optical input > 6.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the receiver. From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Forward Receiver MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. Status Information The following receiver status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Forward Receiver MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each receiver status parameter.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several receiver parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Forward Receiver MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the receiver. Parameter Enable Description Enables or disables the receiver. Configures the module as master or slave.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the receiver. Alarm Information The following receiver alarm information is available: • Receiver enabled/disabled • Hybrid current • Optical power level • Module temperature • Maximum optical input power Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the Receiver (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each receiver alarm parameter.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the receiver. Modifying Alarm Parameters To modify the parameters, navigate to the Module Details window of the receiver (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified. Parameter Meaning Module Module Temperature temperature Values -40.0°C to 70.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the receiver. Status Information The following receiver status information is available. • Optical input power • Hybrid amplifier current • Module temperature Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the receiver (in the LCI module tree). The alarms are shown under the Parameters and Status headings.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several receiver parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the receiver (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the receiver.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the receiver • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the receiver: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to receiver alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Alarm Status • Possible Causes Optical power = > 1.5 dBm or < -1.
Receiver Maintenance Schedule Introduction Regular maintenance is required to extend the life of the receiver and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 2-58 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section E Prisma II Reverse Video Receiver and Reverse Data Receiver Overview Introduction The information in this section applies to the following Prisma II Reverse Receivers: • Prisma II Reverse Video Receiver (data/video grade) • Prisma II Reverse Data Receiver (data grade) The instructions that follow refer to both receivers as “the receiver”. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the receiver. Receiver Alarm LED Description The Alarm LED located on the receiver’s front panel illuminates or blinks to indicate the state of the receiver. The following table shows each possible receiver state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Reverse Receiver MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each receiver alarm parameter. Parameter Meaning Major Low Limit Minor Low Limit Minor High Limit Major High Limit Hysteresis Operating Range InPwr1 Optical input 1 -20.0 dBm -4.0 dBm 2.0 dBm 3.2 dBm 1.0 dBm -17.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the receiver. Status Information The following receiver status information is available. • Optical power level • Module temperature • Mute status • Manual (forced) alarms • Receiver enabled/disabled • Master/Slave mode • Nominal input power level Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Reverse Receiver MODULE menu.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several receiver parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Reverse Receiver MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the receiver. Parameter Description • Mute1 • On=Mute on • Mute2 Force mute.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the receiver. Alarm Information The following receiver alarm information is available: • Receiver enabled/disabled • Hybrid current • Optical power level • Module temperature • Maximum optical input power Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the Receiver (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each receiver alarm parameter. Note: LCI allows you to modify these parameters. Parameter Meaning Major Low Limit Minor Low Limit Minor High Limit Major High Limit Hysteresis Operating Range InPwr1 Optical input 1 -20.0 dBm -4.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the receiver. Status Information The following receiver status information is available. • Optical input power • Module temperature Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the receiver (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each receiver status parameter.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several receiver parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the Receiver (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the receiver.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the receiver • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the receiver: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to receiver alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Alarm Description Possible Causes Possible Solutions InPwr1 Optical input 1 Broken fiber Check fiber.
Receiver Maintenance Schedule Introduction Regular maintenance is required to extend the life of the receiver and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 2-72 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Chapter 3 Optical Switches Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma® and Prisma II™ Optical Switches. Qualified Personnel Only appropriately qualified and trained personnel should attempt to maintain or troubleshoot the switches described in this chapter. WARNING: Allow only qualified personnel to maintain or troubleshoot these switches. Otherwise, personal injury or equipment damage may occur.
Section A Prisma Model 6474 Optical Switches Overview Introduction The information in this section applies to the Prisma 1310 nm and 1550 nm Model 6474 Optical Switches. In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the switch, you can determine whether there is a switch alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select the active alarms. key on the switch to rotate through Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. The following table shows the values displayed on the ALARMS screen for out-ofrange errors or a failure.
Monitor Alarm Parameters, Continued Monitoring Alarm Parameters The following table describes each alarm parameter.
Monitor Alarm Parameters, Continued Parameter 3-6 Meaning 15Vdc +15 V control card power level 24Vdc +24 V backplane power level PSPri Primary backplane power supply status PSsec Secondary backplane power supply status Optical Switches Values Alarm Indicator HIGH: Above 16.50 V Illuminates LOW: Below 13.50 V Illuminates HIGH: Above 26.40 V Illuminates LOW: Below 22.
Monitor Status Parameters Introduction From the STATUS screen on the switch, you can check various parameters to verify the status of the switch.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following switch information: • Optical power for input A in dBm • Optical power for input B in dBm • SMC ID of the switch When in the summary STATUS screen, press the Select rotate through the remaining parameters.
Monitor Status Parameters, Continued Monitoring Status Parameters The following table describes each status parameter. Parameter Meaning Values Summary STATUS Screen: • PoptA Received optical power for input A -13.0 dBm to +18.0 dBm • PoptB Received optical power for input B -13.0 dBm to +18.0 dBm • SMC SMC ID of the switch Programmable 0001 to 65535 PoptA Received optical power for input A -13.0 dBm to +18.0 dBm PoptB Received optical power for input B -13.0 dBm to +18.
Monitor Status Parameters, Continued Parameter 3-10 Meaning Values A5Vdc +5 V analog power level -5Vdc -5 V backplane power level 15Vdc +15 V control card power level 0 V DC to +32.42 V DC 24Vdc +24 V backplane power level 0 V DC to +51.43 V DC PsPri Primary backplane power supply status OK or FAIL PsSec Secondary backplane power supply status OK or FAIL Optical Switches 0 V DC to +10.81 V DC 0 V DC to +9.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the switch • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the switch: • Digital voltmeter • Spectrum analyzer Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to the following types of alarm conditions: • Switch • Power supply Troubleshooting Switch Alarms The following table shows the possible causes of switch alarms and their solutions. Alarm Condition Status OK Software Self Test Optical Power A or B Manual Mode External Control Possible Causes No alarms. No action required. One or more power supply voltages are out of specification.
Troubleshoot Alarm Conditions, Continued Alarm Condition Status Possible Causes The switch has changed to the backup input due to one of the following causes: Backup Switch Position • Bckup B • BckUp A Position Failure Verify the input is within tolerance. Repair or adjust as needed. • Primary optical input is out of tolerance • An external control has forced a switch Refer to the External Control alarm earlier in this table. A manual switch has been set from the front panel or SMC.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply Alarms The following table shows the possible causes of power supply alarms and their solutions. Note: Some or all of the steps will cause a service interruption. Alarm • Status +5 V DC Analog Power • +5 V DC Digital Power • -5 V DC Digital Power • +15 V DC Digital Power • +24 V DC Digital Power High or Low Possible Causes Possible Solutions Loose, unplugged, or damaged power cords.
Troubleshoot Alarm Conditions, Continued Alarm Backplane Power Supply Status (Primary and Secondary) 4000326 Rev A Status Possible Causes The power supply status is: PSPri or PSsec Fail • Reported as in alarm • Not reported at all Optical Switches Possible Solutions Verify the operation of the power supplies. If they are functioning properly and no power supply related alarms are reported on any module in the chassis, the chassis may have a problem.
Switch Maintenance Schedule Introduction Regular maintenance is required to extend the life of the switch and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 3-18 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section B Prisma II Optical Switch Overview Introduction The information in this section applies to the Prisma II Optical Switch. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the switch. Switch Alarm LED Description The Alarm LED located on the switch’s front panel illuminates or blinks to indicate the state of the switch. The following table shows each possible switch state. If the Alarm LED: This Indicates: Blinks a minor alarm condition. Illuminates a critical alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Switch MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each switch alarm parameter. Parameter 4000326 Rev A Meaning Possible Cause of Alarm PInLoss3 Loss of light at input 3. Port 3 is dark. PInLoss4 Loss of light at input 4. Port 4 is dark. BothDark Loss of light at both inputs.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the switch. From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Switch MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. Status Information The following switch status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Switch MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each switch status parameter. Parameter Units Meaning Typical Value SwPos N/A Switch position. PwrIn3 dBm Optical input power on port 3. 0.0 dBm PwrIn4 dBm Optical input power on port 4. 0.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several switch parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Switch MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the switch. Parameter Description Values Default Cross If True, the switch to change to the Cross position.
Configure Parameters Using the ICIM, Continued Parameter Description Values Default HystAmpl Hysteresis Amplitude: the value (in dB relative to switching threshold) above which the input optical power must rise for the switch to begin the hysteresis timer before restoring original switch position. Only applies if Revert is True. Auto mode only. 0.5 to 9.5 dB, increments of 0.1 dB 0.5 HystTime Hysteresis Time. Auto mode only.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the switch. Alarm Information The following switch alarm information is available: • Loss of light • Module temperature Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the switch (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each switch alarm parameter.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify the nominal input power for both ports. Modifying Alarm Parameters To modify the nominal input power parameters, navigate to the Module Details window of the switch (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the switch. Status Information The following switch status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the switch (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each switch status parameter. Parameter Units Port 3 Optical Power dBm Input optical power on Port 3 • 1310 nm: -13.0 dBm to 13.0 dBm • 1550 nm: 13.0 dBm to 18.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several switch parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the switch (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the switch. Parameter Port 3 Optical Power Description Nominal input optical power at input 3, in dBm. Values Default • 1310 nm: -13.0 dBm to 13.
Configure Parameters Using LCI, Continued Parameter Description Values Default Hysteresis Amplitude Hysteresis Amplitude: the value (in dB relative to switching threshold) above which the input optical power must rise for the switch to begin the hysteresis timer before restoring original switch position. Only applies if Revert is True. 0.5 dB to 9.5 dB, increments of 0.1 dB 0.5 dB • Revert • In Auto, allows switch to revert to primary position after optical power is restored.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the switch • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the switch: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to switch alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance. Alarm Meaning Possible Causes PInLoss3 Loss of light at input 3 Input 3 dark.
Switch Maintenance Schedule Introduction Regular maintenance is required to extend the life of the switch and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 3-36 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Chapter 4 Optical Amplifiers Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma® and Prisma II™ Optical Amplifiers. Qualified Personnel Only appropriately qualified and trained personnel should attempt to maintain or troubleshoot the amplifiers described in this chapter. WARNING: Allow only qualified personnel to maintain or troubleshoot these amplifiers. Otherwise, personal injury or equipment damage may occur.
Section A Prisma Model 6476 EDFA Optical Amplifiers Overview Introduction The information in this section applies to the following Prisma Model 6476 EDFA Optical Amplifiers: • Model 6476-16 EDFA Optical Amplifier • Model 6476-16H EDFA Optical Amplifier • Model 6476-19 EDFA Optical Amplifier • Model 6476-20H EDFA Optical Amplifier In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the amplifier, you can determine whether there is an amplifier alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select through the active alarms. key on the amplifier to rotate Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. Alarm Parameters The following table describes each alarm parameter.
Monitor Alarm Parameters, Continued Parameter 4000326 Rev A Meaning Description -5Vdc -5 V DC analog power level The -5 V DC power level is outside normal range. 15Vdc +15 V DC analog power level The +15 V DC control card power level is outside normal range. 24Vdc +24 V DC analog power level The +24 V DC power level is outside normal range. PSpri Power supply The primary backplane power supply alarm. PSsec Power supply The secondary backplane power supply alarm.
Monitor Status Parameters Introduction From the STATUS screen on the amplifier, you can check various parameters to verify the status of the amplifier.
Monitor Status Parameters, Continued STATUS Screen Description The first STATUS screen is called the Summary STATUS screen, and it provides the following amplifier information: • Output power level in dBm • Input power level in dBm • SMC ID of the amplifier When in the summary STATUS screen, press the Select rotate through the remaining parameters. key on the amplifier to Status Parameters The following table describes each status parameter.
Monitor Status Parameters, Continued Parameter 4-8 Meaning Description Pump Pump status Status of the pump PSint Internal power supply Status of the internal EDFA power supply D5Vdc +5 V DC digital power level Status of the +5 V DC digital circuitry A5Vdc +5 V DC analog power level Status of the +5 V DC analog circuitry -5Vdc -5 V DC backplane power level Status of the -5 V DC power 15Vdc +15 V DC analog power level Status of the +15 V DC control card power 24Vdc +24 V DC analog power
Amplifier Specifications Introduction The specifications listed in the following tables can be useful when troubleshooting the amplifiers. Model 6476-16 EDFA Optical Amplifier Power Requirements Parameter Power supply Power consumption Values • Model 6470-2 Chassis • Model 6471 Power Supply Maximum: 10 DC watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +50.
Amplifier Specifications, Continued Performance Characteristics Parameter Values Input power range 0.0 to 10.0 dBm Output power 16.0 dBm Power stability ± 5% over temperature range Optical return loss > 50.0 dB Noise figure (5 dBm input power) < 5.
Amplifier Specifications, Continued Performance Characteristics Parameter Values Input power range 0.0 to 10.0 dBm Output power (at 2.5 dBm input) • Minimum: 19.0 dBm (single output) • Minimum: 16.0 dBm (dual output) Output stability ± 0.2 dB Gain flatness ± 0.2 dB Optical return loss Maximum: -50 dB Noise figure • +2.5 dBm input: < 5.0 dB • +5.0 dBm input: < 5.5 dB Polarization sensitivity ± 0.1 dB RIN < -155.0 dB/Hz Optical isolation > 40.
Amplifier Specifications, Continued Optical Characteristics Parameter Values Wavelength 1535–1565 nm Gain medium Erbium-doped fiber Pump source 980 nm InGaAs diode laser Performance Characteristics Parameter Input power range Output power (at 2.5 dBm input) Values 0.0 dBm to 10.0 dBm • Model 6476-16H: 16.0 dBm • Model 6476-20H: − 20.0 dBm (one output) − 17.0 dBm each (two outputs) 4-12 Output stability ± 0.2 dB Gain flatness ± 0.2 dB Optical return loss Maximum: -50.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the amplifier • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the amplifier: • Digital voltmeter • Spectrum analyzer • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to amplifier alarm conditions. Troubleshooting Alarms Refer to the following table for troubleshooting assistance. Alarm Condition Possible Causes Power connection is loose. Secure all power connections and the line cord. AC power failure. Check other displays for power indication. AC power is off Module indicator is burned out.
Troubleshoot Alarm Conditions, Continued Alarm Condition Possible Causes Fiber path is broken with bends or bad path. Optical power is low or off Power failure. Laser current at maximum. 4000326 Rev A Optical Amplifiers Possible Solutions • Check optical cable for breaks or bends tighter than the fiber specification, and correct the situation. • Clean fiber connections. For instructions, refer to Fiber Optic Connector Cleaning Procedure later in this section.
Amplifier Maintenance Schedule Introduction Regular maintenance is required to extend the life of the amplifier and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 4-18 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section B Prisma Models 6476-22 and 6476-25 CLAD Optical Amplifiers Overview Introduction The information in this section applies to the following Prisma CLAD Optical Amplifiers: • Model 6476-22 CLAD Optical Amplifier • Model 6476-25 CLAD Optical Amplifier In This Section This section contains the following topics.
Monitor Alarm Parameters Introduction From the ALARMS screen on the amplifier, you can determine whether there is an amplifier alarm condition and, if there is an alarm condition, the cause of the alarm. If an alarm condition: • Is present, the cause of the condition displays on the screen. Items that are not in the alarm state are passed over and are not displayed. • Is not present, the message No Alarms displays on the screen.
Monitor Alarm Parameters, Continued ALARMS Screen Description The ALARMS screens let you quickly determine the cause of an alarm. When an ALARMS screen is active, press the Select through the active alarms. key on the amplifier to rotate Each screen also displays the current parameter. If no alarm is active for a particular parameter, the module does not display that screen. Alarm Parameters The following table describes each alarm parameter.
Monitor Alarm Parameters, Continued Parameter 4-22 Meaning Description Mtemp Module temperature Temperature of the unit is outside normal operating range. HtmpA Pump A temperature Temperature of laser A is outside normal operating range. HtmpB Pump B temperature Temperature of laser B is outside normal operating range. PumpA Pump controller A Pump A controller failure. PumpB Pump controller B Pump B controller failure. PSint Power supply Internal power supply status.
Monitor Status Parameters Introduction From the STATUS screen on the amplifier, you can check various parameters to verify the status of the amplifier.
Monitor Status Parameters, Continued STATUS Screen Description The STATUS menu on the ICIM allows you to verify the status of the amplifier. Status Parameters The following table describes each status parameter.
Monitor Status Parameters, Continued Parameter 4000326 Rev A Meaning Description D5Vdc +5 V DC digital power level Status of the +5 V DC power for digital circuitry A5Vdc +5 V DC analog power level Status of the +5 V DC power for analog circuitry -5Vdc -5 V DC backplane power level Status of the -5 V DC power 15Vdc +15 V DC control card power level Status of the +15 V DC control card 24Vdc +24 V DC analog power level Status of the +24 V DC power PSpri Backplane Power Primary backplane p
Amplifier Specifications Introduction The specifications listed in the following tables can be useful when troubleshooting the amplifiers. Specifications Power Requirements Parameter Power supply Power consumption Values • Model 6470-2 Chassis • Model 6471 Power Supply Maximum: 85 DC watts Environmental Specifications Parameter Values Operating temperature 0.0°C to +50.
Amplifier Specifications, Continued Optical Characteristics Parameter Wavelength Output power uniformity Values 1535–1565 nm • Model 6475-22: ≤ 1.0 dB • Model 6475-25: ≤ 1.2 dB Optical return loss 50.0 dB Noise figure (6 dBm input power) Typical: < 6.0 dB Optical connectors E-2000/APC, SC/APC, FC/APC (wide or narrow key) Performance Characteristics Parameter Input power Output power Power stability 4000326 Rev A Values 0.0 dBm to 10.0 dBm • Minimum: 25.0 dBm • Eight ports at 15.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the amplifier • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the amplifier: • Digital voltmeter • Spectrum analyzer • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to amplifier alarm conditions. Troubleshooting Alarms Refer to the following table for troubleshooting assistance. Alarm Condition Possible Causes Power connection is loose. Secure all power connections and the line cord. AC power failure. Check other displays for power indication. AC power is off Module indicator is burned out.
Amplifier Maintenance Schedule Introduction Regular maintenance is required to extend the life of the amplifier and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 4-32 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Section C Prisma II Optical Amplifiers Overview Introduction The information in this section applies to the following Prisma II Optical Amplifiers: • Prisma II Optical Amplifier (1x13 dBm) • Prisma II Optical Amplifier (1x16 dBm) • Prisma II Optical Amplifier (1x17 dBm) • Prisma II Optical Amplifier (1x20 dBm) • Prisma II Optical Amplifier (2x17 dBm) • Prisma II Optical Amplifier (4x17 dBm) • Prisma II Optical Amplifier (8x17 dBm) • Prisma II Post Amplifier In This Section This section contains the followi
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the amplifier. Amplifier Alarm LED Description The Alarm LED located on the amplifier’s front panel illuminates or blinks to indicate the state of the amplifier. The following table shows each possible amplifier state. If the Alarm LED: This Indicates: Blinks a minor alarm condition.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Amplifier MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each amplifier alarm parameter. Major Low Threshold Minor Low Threshold Minor High Threshold Major High Threshold Hysteresis Laser bias current -32 A -32 A -.1 A -.01 A .001 A InPwr Optical input power -15.0 dBm -5.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the amplifier. From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Amplifier MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. Status Information The following amplifier status information is available.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Amplifier MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each amplifier status parameter.
Configure Parameters Using the ICIM Introduction The CONFIG menu on the ICIM allows you to configure several amplifier parameters. Configuring Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Optical Amplifier MODULE menu. From the MODULE menu, press the CFG key to display the CONFIG menu. The following table shows the configurable parameters for the amplifier. Parameter 4-38 Description Enable Turns optical amplifier on/off. SetAtten Optical power attenuation.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the amplifier. Alarm Information The following amplifier alarm information is available: • Laser bias current • Optical input power • Optical output • Laser temperature Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the amplifier (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each amplifier alarm parameter. Major Low Threshold Minor Low Threshold Minor High Threshold Major High Threshold Hysteresis Laser bias current -32 A -32 A -.1 A -.01 A .001 A Laser Input Power Optical input power -15.0 dBm -5.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the amplifier. Modifying Alarm Parameters To modify the parameters, navigate to the Module Details window of the amplifier (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the amplifier. Status Information The following amplifier status information is available. • Optical input power • Optical output power • Laser temperature • Laser operating limit • Laser operating current • Thermoelectric cooler current • Module temperature • Laser in-service hours Note: Not all parameters pertain to every optical amplifier.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the amplifier (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each amplifier status parameter.
Configure Parameters Using LCI Introduction The LCI software allows you to configure several amplifier parameters. Configuring Parameters To configure the parameters, navigate to the Module Details window of the amplifier (in the LCI module tree). The parameters are shown under the Controls heading. The following table shows the configurable parameters for the amplifier. Parameter 4-44 Description Enable Laser Turns optical amplifier on/off. Optical Power Attenuation Optical power attenuation.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the amplifier • Explains how to obtain troubleshooting assistance Needed Equipment You might need the following equipment to troubleshoot the amplifier: • Digital voltmeter • Fiber connector cleaning materials Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The following troubleshooting information helps identify possible causes and solutions to amplifier alarm conditions. Troubleshooting Alarms If the red Alarm indicator is illuminated or blinking, check the ICIM display or the appropriate LCI screen to determine the cause of the alarm. Refer to the following table for troubleshooting assistance.
Amplifier Maintenance Schedule Introduction Regular maintenance is required to extend the life of the amplifier and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance.
Fiber Optic Connector Cleaning Procedure Introduction Clean fiber optic connectors can help prevent interconnect problems and therefore aid system performance. When optical connectors are disconnected and reconnected, the fiber surface can become dirty or scratched. The goal of cleaning the connectors is to remove all dust and contaminants without leaving any residue behind. WARNING: Avoid damage to your eyes! Do not look into any optical connector while the system is active.
Fiber Optic Connector Cleaning Procedure, Continued Cleaning Fiber Optic Connectors Follow these steps to clean a fiber optic connector. 1. Remove loose dirt or dust from the end of the connector by using compressed air to blow dirt off the fiber and the connector. 2. Dampen a lint-free wipe with optical-grade (91%) isopropyl alcohol. If no wipes are available, use Scientific-Atlanta’s ferrule cleaner, part number 468517. 3. Wipe the end of the connector with the lint-free wipe. 4.
Chapter 5 Chassis Overview Introduction This chapter provides information to assist you in maintaining and troubleshooting Prisma® and Prisma II™ Chassis. Qualified Personnel Only appropriately qualified and trained personnel should attempt to maintain or troubleshoot the chassis described in this chapter. WARNING: Allow only qualified personnel to maintain or troubleshoot these chassis. Otherwise, personal injury or equipment damage may occur. In This Chapter This chapter contains the following topics.
Section A Prisma Model 6470-R2 Chassis Overview Introduction The information in this section applies to the Prisma Model 6470-R2 Chassis. In This Section This section contains the following topics.
Power Supply Specifications Introduction The Model 6471 Rack-Mount Power Supply provides primary and backup power for two Prisma chassis. Each power supply consists of the following three modules: • Two power supply modules, each providing primary power to one chassis • One power supply module that provides backup power for both chassis Each module consists of two sub-modules. One sub-module supplies ±5 V power, and the other supplies 24 V power.
Power Supply Specifications, Continued Environmental Specifications Parameter Operating temperature range (ambient) Values • 0.0°C to 50.0°C • 32.0°F to 122.0°F Mechanical Specifications Parameter Depth Width Height Weight Eurocard Values • 13.75 in. • 34.9 cm • 17.25 in. • 43.8 cm • 5.25 in. • 13.3 cm • 19.0 lb • 8.
Power Supply Specifications, Continued Electrical Requirements Parameter Values Voltage requirements 3 x 48 V DC (42–56 V DC) Power consumption 6.5 A x 3 @ 48 V DC Output voltage (One of each per module) • +24 V DC/7.0 A • +5 V DC /15.0 A • -5 V DC / 1.6 A Efficiency ≥ 80.0% Line regulation ± 0.5% Load regulation ± 3.0% Power stability ±5.0% Environmental Specifications Parameter Operating temperature range (ambient) Values • 0.0°C to 50.0°C • 32.0°F to 122.
General Troubleshooting Information Introduction Because the main function of the chassis is to distribute power and establish communication links for the modules installed in the chassis, most troubleshooting involves the modules that are installed in the chassis. However, in some instances, you may need to troubleshoot the chassis. Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to alarm conditions. Troubleshooting Alarm Alarms The following table shows the possible causes of alarm conditions and their possible solutions. Alarm Condition • Display is not on. • POWER indicator is off. • STDBY indicator is on. Possible Causes Possible Solutions Power supply connection is loose. Verify that all power supply connections are secure. Loss of system power.
Chassis Maintenance Schedule Introduction Regular maintenance is required to extend the life of the chassis and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance. Frequency Quarterly When needed Maintenance Required • Make sure all cables are properly mated. • Inspect cables for stress and chafing. • Make sure all retaining screws are tight. Carefully clean the chassis with a soft cloth that is dampened with mild detergent.
Section B Prisma II Chassis Overview Introduction The information in this section applies to the Prisma II Chassis. In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II Chassis allows you to scroll through and view alarms that may exist for the fan tray and power supply. Alarm LED Descriptions The Alarm LED located on the chassis front panel illuminates or blinks to indicate the state of the chassis fan tray. The Alarm LED on the power supply indicates the state of the power supply. The following table shows each possible state.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Power Supply and Fan Tray Software MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. Note: Because the Prisma II Power Supplies are double-wide modules, the ICIM labels the power supply installed in slots 1 and 2 as Ps1. Ps3 refers to the power supply installed in slots 3 and 4. The following table describes each alarm parameter.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the power supply and fan tray.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Power Supply and Fan Tray Software MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. Note: Because the Prisma II Power Supplies are double-wide modules, the ICIM labels the power supply installed in slots 1 and 2 as Ps1. Ps3 refers to the power supply installed in slots 3 and 4.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the power supply or fan tray. Alarm Information The following power supply and fan tray alarm information is available: Power Supply Alarms • AC input • +24 V DC output voltage • +5 V DC output voltage • -5 V DC output voltage Fan Tray Alarms • Fan status • Fan tray temperature Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the fan tray (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each alarm parameter. Parameter Meaning Range Possible Cause of Alarm Fans Status Fan status Normal to alarm No problem. Chassis Temperature Fan tray temperature -40.0°C to 65.0°C Check ventilation.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the power supply and fan tray. Modifying Alarm Parameters To modify the parameters, navigate to the Module Details window of the fan tray (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the power supply and fan tray. Status Information The following power supply and fan tray status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the fan tray (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each status parameter.
General Troubleshooting Information Introduction Because the main function of the chassis is to distribute power and establish communication links for the modules installed in the chassis, most troubleshooting involves the modules that are installed in the chassis. However, in some instances, you may need to troubleshoot the chassis.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to the following types of alarm conditions: • General • Power supply and fan tray Troubleshooting General Alarms The following table shows the possible causes of general alarm conditions and their possible solutions. Alarm Condition POWER indicator is off. Possible Causes Possible Solutions Power supply connection is loose. Verify that all power supply connections are secure. Loss of system power.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply and Fan Tray Alarms The following table shows the possible solutions to power supply and fan tray alarms. Parameter Meaning Range FansOk Fan status OK ChasTemp Fan tray temperature PS1_ACIn AC input for slot 1 power supply OK PS1+24 Slot 1 power supply +24 V DC output voltage 23.8 V DC to 25.6 V DC PS1+5VDC Slot 1 power supply +5 V DC output voltage 4.9 V DC to 5.
Chassis Maintenance Schedule Introduction Regular maintenance is required to extend the life of the chassis and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance. Frequency Daily Quarterly When needed Maintenance Required • Keep the transparent plastic front panel installed. • When not making chassis connections or adjustments, keep the panel closed to help protect the cables, modules, and ICIM. • Make sure all cables are properly mated.
Section C Prisma II High Density Chassis Overview Introduction The information in this section applies to the Prisma II High Density Chassis (HDC). In This Section This section contains the following topics.
Monitor Alarm Parameters Using the ICIM Introduction The Intelligent Communications Interface Module (ICIM) in the Prisma II HDC allows you to scroll through and view alarms that may exist for the power supply and fan tray. Alarm LED Descriptions The Alarm LED located on the chassis front panel illuminates or blinks to indicate the state of the chassis fan tray. The Alarm LED on the power supply indicates the state of the power supply. The following table shows each possible state.
Monitor Alarm Parameters Using the ICIM, Continued Monitoring Alarm Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Power Supply and Fan Tray Software MODULE menu. From the MODULE menu, press the ALRM key to display the ALARMS menu. The following table describes each alarm parameter. Parameter Meaning Range FansOk Fan status OK ChasTemp Fan tray temperature PS1_ACIn AC input for slot 1 power supply OK PS1+24 Slot 1 power supply +24 V DC output voltage 23.
Monitor Status Parameters Using the ICIM Introduction The STATUS menu on the ICIM allows you to verify the status of the power supply and fan tray.
Monitor Status Parameters Using the ICIM, Continued Monitoring Status Parameters From the MAIN or SCROLL menus on the ICIM, navigate to the Prisma II Power Supply and Fan Tray Software MODULE menu. From the MODULE menu, press the STAT key to display the STATUS menu. The following table describes each status parameter.
Monitor Alarm Parameters Using LCI Introduction The Local Craft Interface (LCI) software allows you to view alarms that may exist for the power supply or fan tray. Alarm Information The following power supply and fan tray alarm information is available: Power Supply Alarms • AC input • +24 V DC output voltage • +5 V DC output voltage • -5 V DC output voltage Fan Tray Alarms • Fan status • Fan tray temperature Alarm Limits Alarms limits fall into one of the following categories.
Monitor Alarm Parameters Using LCI, Continued Monitoring Alarm Parameters To monitor the alarms, navigate to the Module Details window of the fan tray (in the LCI module tree). The alarms are shown under the Parameters and Alarms headings. The following table describes each alarm parameter. Parameter Meaning Range Possible Cause of Alarm Fans Status Fan status Normal to alarm No problem. Chassis Temperature Fan tray temperature -40.0°C to 65.0°C Check ventilation.
Modify Alarm Limits Using LCI Introduction Using LCI, you can modify limits for several alarm parameters for the power supply and fan tray. Modifying Alarm Parameters To modify the parameters, navigate to the Module Details window of the fan tray (in the LCI module tree). The parameters are shown under the Parameters heading. The following table shows parameters with alarm limits that can be modified.
Monitor Status Parameters Using LCI Introduction The LCI software allows you to verify the status of the power supply and fan tray. Status Information The following power supply and fan tray status information is available.
Monitor Status Parameters Using LCI, Continued Monitoring Status Parameters To monitor the parameters, navigate to the Module Details window of the fan tray (in the LCI module tree). The alarms are shown under the Parameters and Status headings. The following table describes each status parameter.
General Troubleshooting Information Introduction The following information: • Lists the equipment you might need to troubleshoot the chassis • Explains how to obtain troubleshooting assistance Needed Equipment You might need a digital multimeter (DMM) to troubleshoot the chassis. Additional Assistance For additional troubleshooting assistance, contact a Scientific-Atlanta assistance center in your area.
Troubleshoot Alarm Conditions Introduction The information in this section provides possible solutions to the following types of alarm conditions: • General • Power supply and fan tray Troubleshooting General Alarms The following table shows the possible causes of general alarm conditions and their possible solutions. Alarm Condition POWER indicator is off. Possible Causes Possible Solutions Power supply connection is loose. Verify that all power supply connections are secure. Loss of system power.
Troubleshoot Alarm Conditions, Continued Troubleshooting Power Supply and Fan Tray Alarms The following table shows the possible solutions to power supply and fan tray alarms. Parameter Meaning Range FansOk Fan status OK ChasTemp Fan tray temperature PS1_ACIn AC input for slot 1 power supply OK PS1+24 Slot 1 power supply +24 V DC output voltage 23.8 V DC to 25.6 V DC PS1+5VDC Slot 1 power supply +5 V DC output voltage 4.9 V DC to 5.
Chassis Maintenance Schedule Introduction Regular maintenance is required to extend the life of the chassis and to ensure optimal performance. Required Maintenance The following table describes the recommended maintenance. Frequency Daily Quarterly When needed Maintenance Required • Keep the transparent plastic front panel installed. • When not making chassis connections or adjustments, keep the panel closed to help protect the cables, modules, and ICIM. • Make sure all cables are properly mated.
Chapter 6 Customer Information Overview Introduction This chapter contains information on obtaining product support and returning damaged products to Scientific-Atlanta. In This Chapter This chapter contains the following topics.
Product Support Obtaining Support IF you have… THEN… general questions about this product contact your distributor or sales agent for product information. technical questions about this product call SciCare™ Broadband Services, or other assistance center, and follow the menu options to speak with a service engineer. Assistance Centers Use the following table to find the assistance center in your area.
Returning Products Introduction Returning a product to Scientific-Atlanta for repair includes the following steps: • Obtaining a return material authorization (RMA) number • Packing and shipping the product The following sections describe each of these procedures in detail. Obtaining an RMA Number You must have an RMA number to return products. RMA numbers are valid for 60 days.
Returning Products, Continued 4. Telephone SciCare Broadband Services to request an RMA number. Are you located within the United States? • If yes, call 1-800-722-2009. • If no, call: − The United States: 1-770-236-5300 or − The United Kingdom: +44-1-923-271460 5.
Returning Products, Continued Packing and Shipping the Product Follow these steps to pack the product and ship it to Scientific-Atlanta. 1. Are the product’s original container and packing material available? • If yes, pack the product in the container using the packing material. • If no, pack the product in a sturdy, corrugated box, and cushion it with packing material. Important: You are responsible for delivering the returned product to Scientific-Atlanta safely and undamaged.
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