LL_1310ELLT_TM Ops Manual
Contents
1. Output Power Total Optical Loss dB Model dBm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ELLT 3 2 4 55 54 153 52 51 ELLT 4 3 5 55 54 53 52 51 ELLT 5 4 6 55 54 53 52 51 ELLT 6 5 7 55 54 53 52 51 ELLT 7 6 8 55 54 53 52 51 ELLT 8 7 9 55 54 53 52 51 ELLT 9 8 10 54 5 53 5 52 5 51 5 50 5 ELLT 10 9 11 54 5 53 5 52 5 51 5 50 5 ELLT 11 10 12 54 5 53 5 52 5 51 5 50 5 ELLT 12 11 13 54 53 52 51 50 ELLT 13 12 14 54 53 52 51 50 ELLT 14 12 15 54 53 52 51 Notes for table above e CTB 70 dBc e CSO 65 dBc e XMOD 65 dBc e Total path loss equals 0 5 dB passive connector loss with the balance of all fiber loss at 0 35 dB km e Referenced load is 80 NTSC channels e Performance measured in accordance with NCTA practices using unmodulated CW carriers Continued on next page 70312 ELLT Installation And Operation 1 15 Chapter 1 General Information Equipment Specifications Continued RF The table below lists RF specifications Specifications RF Input Level broadcast Series 3 through 12 15 dBmV channel signal requirement for 77 Series 13 and 14 16 dBmV channel channel loading Isolation narrowcast to 50 min 55 typ dB broadcast RF Input Connector Type F 75 Ohm Power The table below lists power specifications Specifications Input power 24 V dc provided by Laser Link II Mainframe 19 8 W maximum2. sesssseeeeeeeeeeeeeeee 3 1 VIEW ma aa Naa aaa aa aaa wa Baa an aa Aa aaa aa a ADI 3 1 Section A Activating the ELLT ssseeeeeeeeeeeeeeee 3 A 1 OVE VIWA ii 3 A 1 Broadcast RF Signal Input Check HE et EE ae alas ie eens 3 A 2 Narrowcast RF Signal Input Clhieek iiion heben e cbe tei pats 3 A 3 RF Stemal Input SIDA dde eet HORDE REO a DAI OE NUNG PERDRE UR IM EE 3 A 4 Operation with Reduced Channel Load sseeseeeeeeeeeeneeeeeeennn 3 A 5 Operation with Increased Channel Load eerte tras ne nene h eene eae a gn 3 A 6 Section B RF Controls and Indicators s sssssseeeeeeeeeeeeee 3 B 1 OVETVIE RM T TESTER DUNEDIN 3 B 1 Front Panel Controls and Indicators sssseeeeeeeeeeneeneen enne 3 B 2 Rear Panel Connectors rt ke arra psa de aa a dup u a c ea a aa in 3 B 5 Section C Status Monitoring ss sssseseseeee 3 C 1 OV CE VIC Wieso ostiiedie desc EE A vedi ide retis Ped bv ies teta cipe dedos SO d hes AR 3 C 1 IB s glori TERT TT 3 C 2 EMIC Esse d be s n a a a Mc AAA EA 3 C 3 Third Patty tration enna tH daca P PRI DIS a sa a UNS RIVE bU a A ae ee 3 C 4 Section D Troubleshooting sssseeeseeeeeee
3. Fan Status LED 4 4 General Alarm Optical Test Point 1 V dc 10 mW There are twelve versions of the ELLT designated with product codes ELLT 3 through ELLT 14 The product codes refer to different versions of the ELLT with different optical specifications Refer to the specification tables for details All are available with either an SC APC or an SC UPC connector 1 12 ELLT Installation And Operation Continued on next page 70312 Chapter 1 General Information Eguipment Description Continued Functional Description continued 70312 The main broadcast RF input of ELLT 3 through ELLT 14 requires a nominal 15 dBmV channel signal for 78 channel loading ELLT 13 and ELLT 14 require an additional 1 0 dB of RF input In all ELLTS the signal is amplified and then passed through a variable attenuator and slope adjust circuit The variable attenuator has a range of 2 dB while the slope adjust circuit can adjust for 5 dB of cable Both of these adjustments are controlled by front panel potentiometers Following this stage the narrowcast RF input is coupled with the broadcast RF signal The narrowcast RF input requires a nominal 42 dBmV channel to match the level of the broadcast signal The combined signals are routed to a second amplifier stage which provides the gain necessary for proper signal level to the laser A sample of this signal is applied to
4. Have freight bill or receipt signed by the carrier s agent What to do Concealed damage is not apparent until after unpacking The contents may be about damaged in transit due to rough handling even though the carton may not Concealed show external damage The carrier is responsible for hidden damage caused in Damage transit If you follow these instructions carefully ANTEC Network Technologies guarantees its full support of your claims to protect you against loss from concealed damage If you discover damage after unpacking make a written request for inspection by the carrier s agent within 15 days of delivery date File any claims with the carrier not ANTEC Network Technologies How to Follow this procedure to inventory equipment Inventory Equipment 1 Check off each item received against the list on the packing slip included with the shipment Verify this list matches the purchase order 3 If any items are missing please notify ANTEC Network Technologies immediately by calling 1 800 FIBERME in the US or calling your local sales office outside of the US Return a copy of the packing slip with the missing item s circled 70312 ELLT Installation and Operation 2 A 3 Chapter 2 Installation How to Return Equipment Overview Procedure 2 A 4 ANTEC Network Technologies makes every effort to ensure parts and equipment arrive in working condition Occasionally it may be necessary to return parts
5. 3 D 1 Troubleshoot voee eR REDI Eon IE matinee GE oen gerne 3 D 1 vi ELLT Installation and Operation 70312 Chapter 1 General Information Introduction This manual describes the installation and operation of the Laser Link Enhanced Transmitter ELLT Manual This manual contains three chapters Contents e Chapter 1 General Information Chapter 2 Installation Chapter 3 Setup and Operation How To Use This manual is divided into the chapters listed above Major topics in each This Manual chapter are listed at the beginning of the chapter Use these lists to find the desired information In This Chapter This chapter contains these major topics Equipment Description Equipment Specifications List of Abbreviations 70312 ELLT Installation And Operation 1 1 Chapter 1 General Information How To Contact ANTEC Network Technologies Overview ANTEC Network Technologies is ready to assist you as necessary How To Contact Here s how to contact us ANTEC Network Technologies In The USA Outside The USA By phone call 1 800 FIBERME and Contact your ANTEC Network follow the voice prompts Technologies sales office for assistance Sales offices are listed on By mail write to the back cover of this manual ANTEC Network Technologies Attention Technical Service 11450 Technology Circle Duluth GA 30097 1 2 ELLT Installation And Operation 70312 Chapter 1 General Information We Welcome Your Commen
6. Brazil Rua Luiz Carlos Prestes 350 Suite 205 206 Barra Trade ll Barra da Tijuca Rio de Janeiro RJ Brasil 22793 P 5521 430 8829 F 5521 430 8930 Venezuela Ave Rio de Janeiro Edf ELE Piso 1 Ofic No 2 Las Mercedes Caracas Venezuela P 582 993 2340 F 582 993 1468 Mexico Leona Vicario 710 A desp 001 Col La Purisima Metepec Edo de Mexico C P 52140 Mexico P 52 72 12 45 93 F 52 72 12 45 94 Network Technologies
7. Contact Technical Services for an RR or replacement fan END OF CHAPTER 3 D 2 ELLT Installation and Operation 70312 This page intentionally left blank United States Global Headguarters 11450 Technology Circle Duluth GA 30097 USA P 678 473 2000 F 678 473 8454 Canada Toronto 1458 Epping Road Burlington Ontario L7M IP4 P 905 332 5166 F 905 332 9630 Europe Milan C amp S S R L Strada Malaspina 12 20090 S Felice Segrate Milan Italy P 439 2 70301049 F 39 2 70301049 United Kingdom Watermeadow House Watermeadow Chesham Bucks HP5 1LF United Kingdom P 44 1494 776060 F 44 1494 773397 Internet www antec com Asia Pacific Beijing Unit 876 Poly Plaza no 14 Dongzhimen Nandajie Dongcheng District Beijing 100027 People s Republic of China P 86 10 6501 1876 F 86 10 6501 1296 Shanghai 2004 Nanjing West Road Shanghai Inter national Business Centre Suite 412 Shanghai 200040 People s Republic of China P 86 21 6248 4589 F 86 21 6248 1018 Hong Kong Unit 1814 Miramar Tower 1 23 Kimber ey Road TST Kowloon Hong Kong P 852 2735 3131 F 852 2736 7171 Singapore Block 105 09 2182 Bedok North Avenue 4 Singapore 460105 P 65 245 1175 F 65 245 1165 Latin Amer ica Miami 8578 NW 23rd Street Miami FL 33122 USA P 305 592 3948 F 305 592 9646 Argentina Av Juan de Garay 840 3 Piso Buenos Aires Argentina 1153 P 541 300 2333 F 541 300 0083
8. Physical The table below lists physical specifications Specifications Characteristic Specification Operating temperature 32 to 122 F 0 to 50 C Storage Temperature 4 to 156 F 20 to 70 C Relative humidity 5 to 95 non condensing Mainframe Dimensions Height 5 25 in 13 3 cm Width 2 17 in 5 5 cm Depth 13 5 in 34 3 cm 1 16 ELLT Installation And Operation 70312 Chapter 1 General Information List Of Abbreviations Overview 70312 The table below lists abbreviations used in this publication cm centimeter AA CNR Carrier to noise ratio OA CSO composite second order B decibel o De directional coupler DSO discrete second order ooo DVM Digital VoltMeter o ooo MHz jMegaHenz 0 mm manometer S O NB Noiepowerrtio RR fretum forrepair OA ELLT Installation And Operation 1 17 Chapter 1 General Information This Page Intentionally Blank END OF CHAPTER 1 18 ELLT Installation And Operation 70312 Chapter 2 Installation Overview Introduction This chapter describes installation of the Laser Link Enhanced Transmitter ELLT In this Chapter This chapter contains these sections Preparing for Installation EM Installing the ELLT B Care and Cleaning of Optical Connectors 70312 ELLT Installation and Operation 2 1 Chapter 2 Installation This Page Intentionally Blank 2 2 EL
9. are typical around industrial sites Never stand underneath anything while it is hoisted Always wear a hardhat especially if someone is above you Failure to observe this admonishment may result in death or severe injury Continued on next page 70312 ELLT Installation And Operation 1 7 Chapter 1 General Information Safety Continued Laser Safety Summary These are general safety precautions associated with a class 1B laser They are not related to any specific procedure These are recommended precautions that personnel must apply and understand Radiation from semiconductor laser diodes feeding this detector may be sufficiently intensive to cause almost instantaneous damage to the eye Consider each application hazardous until proven safe Carefully consider power emitted radiation angle of divergence or confinement of radiation within optical fibers or other physical constraints Since the radiation is in the non visible infra red portion of the spectrum take precautions to avoid the accidental viewing of the light source AM paneer Laser hazard This product contains a class 1B laser with no safety interlocks Under no circumstances should connectors be viewed with equipment enabled Direct viewing of connectors can cause eye damage Failure to adhere to this admonishment may result in serious injury to the eye s or even blindness Continued on next page ELLT Installation And Operation 70312 Safety Contin
10. to the mainframe power distribution board for 24 V Replace as needed e If the cable is normal and 24 V is present replace the ELLT and contact Technical Services for an RR OPTICAL POWER Optical output Replace the ELLT and contact LED red power is out of Technical Services for an RR range Continued on next page 70312 ELLT Installation and Operation 3 D 1 Chapter 3 Setup and Operation Troubleshooting Continued Chart continued RF STATUS RF input level to Check the RF test point and LED red the laser is out of verify that the RF level has range dropped approximately 15 dB below the original factory set level e If level is normal replace the ELLT and contact Technical Services for an RR e If the test point verifies the RF level is low disconnect the main RF input to the ELLT and measure the signal level The level should match the level in the RF Signal Input diagram for the channel load applied Correct the problem and reconnect the cable to the ELLT LASER TEMP Laser temperature is If the operating environment is LED red out of range within normal range replace the ELLT and contact Technical Services for an RR LASER BIAS Laser bias current is Replace the ELLT and contact LED red out of range Technical Services for an RR FAN LED red Fan failure The ELLT will continue to operate properly up to 50 C Replace or repair as necessary Disconnect fan by removing fan screw and power adapter
11. an RF detector circuit for monitoring and to the test point The RF signal is applied to the laser board where it intensity modulates the light source for transmission over the output fiber Optimum RF drive level varies from diode to diode even between identical products To aid in ELLT optimization the RF test point provides 10 dBmV channel at 110 channel NTSC input in all versions of the ELLT The optimization point for 77 NTSC channel loading is 11 5 dBmV channel The laser board consists of a pre distorter and DFB laser diode package A laser monitor circuit provides constant temperature and output power control of the diode package over the full range of ambient temperature This monitor circuit also provides a calibrated 1V dc 10 mW optical power test point to the front panel controls the front panel optical power laser temperature laser bias and status LEDs and provides analog signals and alarms to the telemetry connections on the Laser Link II Mainframe The A B power select circuit is an integral part of the ELLT If an optional redundant power supply is installed 24 V dc is supplied to the ELLT power input from both the primary and redundant supplies The power select circuit automatically draws power from the redundant supply if the primary supply fails The power indicator on the front panel displays the status Green indicates normal operation and Red indicates the redundant supply is operating Continued on next page E
12. be attached to the bulkhead adapter must be cleaned This section describes recommended cleaning instructions for both halves of the connection Proper care and cleaning of optical connectors is critical to equipment operation Follow these guidelines when working with optical connectors AM paneer Laser light hazard Never look into the end of an optical fiber or connector Use an indirect image converting device such as the Find R Scope Failure to observe this danger can result in eye damage or blindness e The working surfaces of optical connectors are highly polished and designed for precision alignment Keep them microscopically clean and free of scratches Optical power readings and signal quality can seriously degrade if optical connectors or bulkheads are mishandled or allowed to become dirty Optical bulkheads on transmitters and receivers and the connector faces of optical cables are shipped with protective caps Do not remove caps until ready to make connections Do not touch unprotected optical connector faces Do not allow dirt to touch the connector to the bulkheads Small scratches minute traces of dirt or skin oils can degrade signal quality Continued on next page ELLT Installation and Operation 2 C 1 Chapter 2 Installation Overview Continued Consumable These consumable materials are required for the cleaning procedure Materials e Lint Free Wipes tissues e Ethyl or Isopropyl Alcohol gt 91
13. degraded if the CAUTION is not observed NOTE highlights critical information about a procedure or description A NOTE NOTE does not describe hazards to personnel equipment or service Continued on next page on next page 1 4 ELLT Installation And Operation 70312 Chapter 1 General Information Safety Continued Admonishment A graphic symbol and title to denote each type of admonishment The table Symbols below lists typical admonishments their graphic symbol and meaning All of these admonishments may not be used in this manual Admonishment Graphic Symbol Holl MN m a Mechanical hazard A A DA Electrical hazard Laser light hazard Lifting object hazard DANGER Chemical Hazard WARNING CAUTION NOTE Highlights critical information No personnel or equipment hazards Continued on next page Possible interruption of customer service Possible damage to equipment 70312 ELLT Installation And Operation 1 5 Chapter 1 General Information Safety Continued Emergency Plan Have an emergency plan Know the procedure for obtaining first aid and fire fighting assistance Plan your work and maintain good housekeeping Your safety and the quality of the product depend on it Resuscitation Personnel working with or near hazardous voltages or chemicals should be familiar with modern methods of resuscitation Electrical These are general electrical safety precautions that are not related to any Saf
14. 70312 Laser Link ELLT Enhanced Fiber Optic Transmitter 1310nm 45 870 MHz INSTALLATION AND OPERATION MANUAL 68 This page intentionally left blank Laser Link ELLT Enhanced Fiber Optic Transmitter 1310nm 45 870 M Hz INSTALLATION AND OPERATION MANUAL Data drawings and other material contained herein are proprietary to ANTEC Network Technologies and may not be reproduced or duplicated in any form without the prior written permission of ANTEC Network Technologies When ordering parts from ANTEC Network Technologies be sure to include the equipment model number equipment serial number and a description of the part In all correspondence with ANTEC Network Technologies regarding this publication please refer to 70312 First Edition 12 98 1998 by ANTEC Network Technologies All rights reserved No part of this book may be reproduced in any form or by any means without permission in writing from ANTEC Network Technologies Network Technologies This page intentionally left blank Table of Contents Chapter 1 General Information s ssssssseseeeeeesenee 1 1 VI Wi a a Aa aa WA Aa WA aa AA Ma WA IA 1 1 How to Contact ANTEC Network Technologies wwsssnmmmmmmnnanemananzimananimnanz 1 2 We Welcome Your Co mimellts io dp rete Suen dude Lanes cua aa dace de uu dus Mesto 1 3 SAIBLy ensis ted GA WAISHI N
15. AA veers cag KAA ANA AEEA aaa es dea ef Codi te iude icd dead 1 4 Equipment DA Ai 1 10 Equipment Specificatioris 23 neta b i E eaa vents endl cea ids cbr ee td d 1 15 List of AbDreviaftOHs a1 oom eid eode rid acie lr HE E OI erri ecu dorus 1 17 Chapter 2 InstallatiOn 5 eeectat ee terere Re ERE ARRAS Ve d EIE NC UI d RN REL EILEEN 2 1 OVVIE Wes te EO Hase ees Gas eR HE Montiel tenia Fere es hater Fes epu Lends ets techie UDA UA s asque d Res pene den aait 2 1 Section A Preparing for Installation ccsssssssssscccccscsssssssssssccccsccsssssssssscesssscssssees 2 A 1 cau PTT PE DEREN RETE 2 A 1 Wa AA diam mi dra EK ut d E EE 2 A 2 Inspectioni iie c e Gai velt oda Geb ende eh teda Cetus 2 A 3 How to Return Equipments attese te esr eet d eina tates e mtd Gawain 2 A 4 Recommended Tools and BQuipment us oreet ge E ke PR EUREN PERSE BEER ERU E ESAE 2 A 6 Section B Installing the ELLT s sssseeseeeeeeeeeee 2 B 1 MPT AA al DE s accede ae eR AA AA Se cea MESI eta et aac ease eax AA 2 B 1 Section C Care and Cleaning of Optical Connectors ecce esee eee ee eee een nue 2 C 1 OVE VIEW onspenn tesi a eee wamama s vetu ese ede eoe waina eee bes deo wapone Ded EEEE 2 C 1 icu cc es esl r a NE ede SR eld a eS etal seh 2 C 3 Continued on next page 70312 ELLT Installation and Operation V Table of Contents continued Chapter 3 Setup and Operation
16. LLT Installation And Operation 1 13 Chapter 1 General Information Eguipment Description Continued Functional Description continued Part Numbers The ELLT also provides power alarms and status indications to the Laser Link II user panel or the Element Management Interface Card EMIC The Laser Link EMIC collects the vital signs signals from the modules in a Laser Link II Mainframe The EMIC is the communications link between Laser Link II Mainframes and the Track Link Element Management System The Laser Link II Mainframe user panel receives information from the ELLT through the mainframe general operational alarm GOALN The alarm LED on the mainframe turns red if any of the following occur redundant power supply is selected optical output power drops by 2590 laser temperature is out of range laser bias is out of range or the fan has failed The table below lists the ANTEC Network Technologies part numbers for all versions of the ELLT All are 870 MHz dual input units pum ROT ELLT Designation SC APC Connector SC UPC Connector Sa O ELLT Installation And Operation 70312 Chapter 1 General Information Eguipment Specifications Overview This section describes specifications of the ELLT Optical The tables below list optical specifications Specifications Characteristic Specification See table below Connector return loss gt 65 dB SC APC gt 55 dB SC UPC Wavelength 1310 10 nm
17. LT Installation and Operation 70312 Section A Preparing for Installation Overview Introduction This section describes preparing to install the ELLT In this Section This section contains the following topics Unpacking Inspection How to Return Equipment Recommended Tools and Equipment 70312 ELLT Installation and Operation 2 A 1 Chapter 2 Installation Unpacking Overview Procedure 2 A 2 ANTEC Network Technologies thoroughly inspects and carefully packs all equipment before shipment At the time of shipment the carrier assumes responsibility for its safe delivery therefore do not return damaged units to ANTEC Network Technologies Unpack the transmitter according to the procedure below Inspect shipping carton for visible damage 2 Open the shipping carton Do not destroy shipping cartons until installation is complete Remove all packing material Inspect unit for visible damage 5 Using packing list check for missing items see How To Inventory Equipment Received ELLT Installation and Operation 70312 Chapter 2 Installation Inspection What to do Report visible loss or damage as follows about Visible Loss or Damage NOTE Failure to adequately describe external evidence of loss or damage may result in the carrier refusing to honor a damage claim Obtain a claim form from the carrier 2 Make a note of any loss or evidence of external damage on the freight bill or receipt
18. This is often desirable in supertrunk applications using split band operation The drive level is increased by 10 log 78 x where x is equal to the desired channel load The CNR is improved by approximately the same factor Refer to the RF signal input diagram to help determine the appropriate input level to the ELLT RF Signal Input 18 0 Diagram 17 5 Postma 16 5 16 0 D 15 5 FS 15 0 Fb 14 5 14 0 FS 13 5 13 0 40 50 60 70 80 90 100 110 70312 ELLT Installation and Operation 3 A 5 Chapter 3 Setup and Operation Operation with Increased Channel Load Description For operation above 78 channels it is necessary to reduce the input level to the ELLT to maintain the appropriate headroom below the clipping point of the laser The reduction in level is again derived from 10 log 78 x where x is equal to the desired channel load Refer to the RF signal input diagram 3 A 6 ELLT Installation and Operation 70312 Section B Controls and Indicators Overview Introduction This section describes the controls and indicators of the ELLT In this Section This section contains the following topics Front Panel Controls and Indicators Rear Panel Connectors 70312 ELLT Installation and Operation 3 B 1 Chapter 3 Setup and Operation Front Panel Controls and Indicators Overview The front panel of the ELLT provi
19. caution will deposit contaminates on the fiber surface 1 Moisten a lint free swab with gt 91 pure ethyl or isopropyl alcohol 2 Insert the moistened swab into the bulkhead adapter until it touches the interior connector face Apply light pressure and rotate the swab approximately eight to ten turns Remove the swab 5 Insert a dry lint free swab and gently turn several times Continued on next page 2 C 4 ELLT Installation and Operation 70312 Chapter 2 Installation Cleaning Continued Cleaning of Connectors in a Bulkhead Adapter continued Blow dust particles from the interior surface of the bulkhead adapter using filtered canned air as follows A CAUTION Be sure to hold air can in upright position so that liquid from the can cannot enter the air tube Do not shake the can Do not blow air directly on the fiber Failure to observe this caution may damage the connector or cause contaminates to be placed on the surface being cleaned Hold air can upright Position the can extension tube approximately 6 in 15 3 cm from the surface to be cleaned Gently blow air into the adapter Insert a recently cleaned connector into the bulkhead adapter 70312 ELLT Installation and Operation 2 C 5 Chapter 2 Installation Cleaning Continued Cleaning of Follow this procedure to clean optical connectors not installed in an equipment Connectors Not bulkhead adapter in a Bulkhead Adapter NOTE Do
20. d tools and equipment are required for installation Equipment Quantity 1 4 inch flat blade screwdriver Optical connector cleaning supplies 2 A 6 ELLT Installation and Operation 70312 Section B Installing the ELLT Installation Introduction This section describes installing the ELLT The ELLT is shipped assembled with the exception of the 15 pin male to female shielded cable assembly and keys for the ON OFF switch Install the ELLT in any slot one through seven of the mainframe After installation refer to the procedures in Chapter 3 Setup and Operation to activate the ELLT Procedure Follow this procedure to install the ELLT AN CAUTION Static sensitive devices Always wear a properly grounded wrist strap when working on this eguipment The shelf has a grounding jack that may be used to plug the wrist strap into Failure to observe this caution may result in equipment damage or premature equipment failure Open the front cover of the mainframe by turning the front panel latch handles counterclockwise Continued on next page 70312 ELLT Installation and Operation 2 B 1 Chapter 2 Installation Installation Continued Procedure continued NOTE When installing in a mainframe bay that is equipped with 14 rails remove the rail in the B position to accommodate the transmitter module Carefully insert the transmitter into an empty slot of the LaserLink II Mainframe Align the flange on t
21. des access to the optical and RF test points RF attenuator and slope adjustment LED diagnostic indicators and the optical output conector Diagram This diagram shows the front panel of the ELLT XMTR ELLT XX 45 870 MHz POWER RF STATUS OPTICAL POWER LASER TEMP di 4 B 5 LASER BIAS bo 7 m 8 6 FAN RF ATTENUATOR a ADJUST SLOPE ADJUST O lt OPTICAL POWER 7 1Vdc 10mW TEST 10 dBmV CH WS ka 10 Continued on next page 3 B 2 ELLT Installation and Operation 70312 Chapter 3 Setup and Operation Front Panel Controls and Indicators Continued Description 70312 The table below describes the front panel controls and indicators Control Indicator POWER LED Displays status of power to the ELLT e Green indicates normal operation of the 424 V dc primary power supply Red indicates the ELLT is powered by the 424 V dc backup supply Off not lit indicates no power to the ELLT RF STATUS LED Loss of RF alarm Green indicates RF level is within approximately 15 dB of the factory set level Red indicates RF level has dropped approximately 15 dB below the factory set level OPTICAL POWER Green indicates normal operation ED e Red indicates optical power has dropped by gt 25 of initial value L 4 LASER TEMP LED Green indicates normal operation Red indicates laser temperature is out
22. ed on the power distribution board and provides non proprietary network management signals see mainframe user manual The telemetry alarm parameters vital sign designation and DB 15 connector pin numbers are provided in the table below VS Pin Description Logic RPAN 0 V normal 84 4 GOALN general alarm 24 V normal 5 V dc fault RPAN 0 V alarm laser temp out of range laser bias out of range optical power out of range or fan alarm 3 C 4 ELLT Installation and Operation 70312 Section D Troubleshooting Troubleshooting Overview The ELLT is designed for continual reliable service in a communications network There is no recommended maintenance required to be performed on the ELLT Routine network preventative maintenance such as monitoring performance can be achieved from the front panel diagnostics or through element management systems such as Track Link or third party providers Chart Use this chart as an aid in the trouble analysis of the ELLT If you require assistance call ANTEC Technical Services at 1 800 FIBER ME Technical Service is available between 8 am and 6 pm est Twenty four hour emergency service is available on a callback basis within 30 minutes Power LED red or Power failure Check the 24 V A and B LED extinguished status on the user panel If red replace the appropriate power supply and contact Technical Services for an RR e If extinguished check the 15 pin cable from the ELLT
23. ety specific procedure These are recommended precautions that personnel should Summary understand and apply Electrical Danger AN danger Avoid shorting circuits when using metal tools Some circuits have high current capability When shorted these circuits will flash and may cause burns or eye injury Remove all jewelry and exposed metal objects from body and clothing before performing maintenance adjustments or troubleshooting Before working inside the equipment remove all power unless power is required to perform the procedure Failure to observe this admonishment may result in death or severe injury Continued on next page ELLT Installation And Operation 70312 Chapter 1 General Information Safety Continued Electrical Danger continued J WA Replacement of fuses or other parts must be with identical types and ratings Substitution of non identical parts may cause safety and fire hazards Servicing this eguipment may reguire working with protective covers removed and ac power connected Use extreme caution during these procedures Failure to observe this admonishment may result in death or severe injury Mechanical These are general mechanical safety precautions that are not related to any Safety specific procedure These are recommended precautions that personnel should Summary understand and apply Overhead hazards either because items may fall or because personnel may strike them unintentionally
24. he top and bottom of the module with the top and bottom slide rail on the mainframe emere dewerbafin Core and Cg e Opleal Caeci connector as described in Care and Cleaning of Optical Connectors Secure the transmitter in the shelf with the two captive screws located on the top of the transmitter front faceplate The screws are provided with the module Connect the 15 pin D type shielded cable assembly one end to the connector labeled POWER on the rear of the module other end to the connector on the power distribution board of the mainframe J1 J7 ee 9 MUN Secure both cable connectors with screws Verify mainframe power is on and turn the key switch of the ELLT to the ON position Verify that the POWER OPTICAL POWER LASER BIAS LASER TEMP and FAN LEDs are green before proceeding Note that while the ELLT is stabilizing during initial startup the LEDs may be red The RF STATUS LED remains red until an RF input is applied Turn the key switch to the OFF position of Optical Connectors 12 Continue to Chapter 3 to activate the ELLT 2 3 4 5 7 10 11 12 2 B 2 ELLT Installation and Operation 70312 Overview Introduction Guidelines 70312 Section C Care and Cleaning of Optical Connectors Fiber optic connectors are cleaned at assembly but require recleaning when the equipment is installed Both the connector attached to the bulkhead adapter in the equipment and the jumper connector that will
25. ins the following topics Broadcast RF Signal Input Check Narrowcast RF Signal Input Check RF Signal Input Slope 70312 ELLT Installation and Operation 3 A 1 Chapter 3 Setup and Operation Broadcast RF Signal Input Check Broadcast RF Signal Input Check 3 A 2 Check the broadcast RF input signal with a spectrum analyzer prior to connecting the cable to the RF IN 1 jack of the module In the case of a 77 NTSC channel load the laser drive level has been optimized during manufacture to achieve the specified link performance of the module with an RF input level of e 15 dBmV channel ELLT 3 through ELLT 12 e 16 dBmV channel ELLT 13 and ELLT 14 The optimized RF test port output value is 11 5 dBmV channel for 77 channel loading and 10 dBmV channel for 110 channel loading After verifying the correct RF level connect the 75 Ohm cable to the RF input port on the rear of the ELLT ELLT Installation and Operation 70312 Chapter 3 Setup and Operation Narrowcast RF Signal Input Check Narrowcast RF Check the narrowcast RF input signal with a spectrum analyzer prior to Signal Input connecting the cable to the RF IN 2 jack of the module Check Use the front panel test point and the spectrum analyzer to compare the narrowcast RF input level to the broadcast RF input level If the broadcast and narrowcast signals are operated at equal carrier levels a general guideline is that the RF input on RF IN 2 should be 27 dB abo
26. not reinstall protective cap after cleaning procedure Protective caps are designed to protect the connector ferrule from damage not to keep the connector clean Remove protective cap from bulkhead connector Place another dry lint free wipe on top of the first wipe A CAUTION Do not use alcohol less than 91 pure Do not use common rubbing alcohol Failure to observe this caution will deposit contaminates on the fiber surface 2 N CAUTION Avoid contamination of lint free wipes Handle wipes by the edges Discard each wipe immediately after use Failure to observe this caution may result in contaminates on the surface being cleaned Place a dry lint free wipe on a solid surface Moisten the top wipe with gt 91 pure ethyl or isopropyl alcohol Continued on next page 2 C 6 ELLT Installation and Operation 70312 Chapter 2 Installation Cleaning Continued Cleaning of Connectors Not in a Bulkhead Adapter continued Gently wipe the connector ferrule and endface For APC connectors only wipe with one continuous motion in the direction of the angle Place a dry lint free wipe on a solid surface and gently slide the connector endface across the wipe For APC connectors only wipe with one continuous motion in the direction of the angle Blow dust particles from connector using filtered canned air as follows MA CAUTION Be sure to hold air can in upright position so that liguid from the can cannot enter the air t
27. of range LASER BIAS LED Green indicates normal operation e Red indicates laser bias current is out of range e Red indicates fan failure laser RF drive level ot quem ewes AAA 5 dB of cable tilt Continued on next page 1 2 3 5 ELLT Installation and Operation 3 B 3 Chapter 3 Setup and Operation Front Panel Controls and Indicators Continued Description continued Control Indicator OPTICAL POWER Optical power test point Provides a 1 V dc 10 mW scaled dc voltage of the transmitter s optical output power 1 V dc represents 10 mW of optical power at 1310 nm Exp OFF ON Key Switch Key switch turns power on and off to activate and deactivate the ELLT SC Adapter Optical output SC APC connector 12 TEST RF test point Provides 10 10 dBmV CH dBmV channel at optimum drive level for 110 NTSC channel loading and 11 5 dBmV channel at 77 NTSC channel loading 10 11 3 B 4 ELLT Installation and Operation 70312 Chapter 3 Setup and Operation Rear Panel Connectors Overview The rear panel of the ELLT provides access to the RF input connector and the power interface Diagram This diagram shows the rear panel of the ELLT 3 Continued on next page 70312 ELLT Installation and Operation 3 B 5 Chapter 3 Setup and Operation Rear Panel Connectors Continued Desc
28. on The LaserLink user panel receives information from the ELLT through the mainframe s general operation alarm GOALN The ALARM LED on the panel will be illuminated red to signal an alarm condition for any of the modules housed in the unit transmitters receivers and amplifiers Conditions of the ELLT that would trip this alarm include operation by redundant power supply laser temperature out of range laser bias out of range optical power output out of range drop by 25 and or a fan failure 3 C 2 ELLT Installation and Operation 70312 EMIC Description 70312 Chapter 3 Setup and Operation The optional Element Management Interface Card EMIC collects the vital signs signals of the modules in a Laser Link II Mainframe provides the communications interface between the mainframe and the Track Link system if used Parameters monitored by this system include power supply status 5 V dc status optical output power laser bias current and laser temperature via GOALN signal The actual optical output power and laser bias values are provided to the user through a graphical interface ELLT Installation and Operation 3 C 3 Chapter 3 Setup and Operation Third Party Description For use with third party network management systems such as AM Communications and Superior Electronics products the ELLT may be monitored via the telemetry port on the Laser Link II Mainframe The 25 pin connector interface is locat
29. or equipment that are not in working condition Follow this procedure to return equipment Contact ANTEC Network Technologies By phone call Contact your sales office for 1 800 FIBERME and follow _ assistance Sales offices are the voice prompts listed on the back cover of this manual 2 Tag or otherwise identify the defective eguipment Be sure to write the RR number on the tag 3 If possible please reference the sales order purchase order and date the equipment was received A CAUTION Do not use Styrofoam chips peanuts Use of Styrofoam chips peanuts will void the warranty Pack the equipment in the original container and protective packing material if possible If the original packing material is not available use a sturdy corrugated box and appropriate protective packing material Continued on next page ELLT Installation and Operation 70312 Chapter 2 Installation How to Return Equipment Continued Procedure continued Be sure to include this information Your Name Company Name Street Address City State Country and Zip Postal Code Telephone Number RR Number Problem Description NOTE Ship equipment prepaid ANTEC Network Technologies will not accept freight collect Ship equipment to ANTEC Network Technologies as directed by Customer Service 70312 ELLT Installation and Operation 2 A 5 Chapter 2 Installation Recommended Tools and Equipment Tools and These recommende
30. purity Do not use a lesser grade Do not use common rubbing alcohol e Filtered Canned Air e Lint Free Swabs 2 C 2 ELLT Installation and Operation 70312 Chapter 2 Installation Cleaning Overview This section describes cleaning two types of optical connectors Connectors installed in a bulkhead adapter Connectors not installed in a bulkhead adapter Cleaning of Follow this procedure to clean optical connectors installed in an equipment Connectors ina bulkhead adapter Bulkhead Adapter Remove protective cap from bulkhead connector Blow dust particles from the interior surface of the bulkhead adapter using filtered canned air as follows A CAUTION Be sure to hold air can in upright position so that liquid from the can cannot enter the air tube Do not shake the can Do not blow air directly on the fiber Failure to observe this caution may damage the connector or cause contaminates to be placed on the surface being cleaned Hold air can upright Position the can extension tube approximately 6 in 15 3 cm from the surface to be cleaned Gently blow into the adapter Continued on next page 70312 ELLT Installation and Operation 2 C 3 Chapter 2 Installation Cleaning Continued Cleaning of Connectors in a Bulkhead Adapter continued Swab the bulkhead adapter using a lint free swab as follows AN CAUTION Do not use alcohol less than 91 pure Do not use common rubbing alcohol Failure to observe this
31. ration Optical Output Power 1VDC 1mW Laser Drive Level 10 dBmV channel at 110 channel NTSC input Power on off key switch Slope adjust 0 5dB 45 870 MHz Attenuation Adjust 2 dB min Green Red power LED Green Red RF status LED Green Red optical power LED Green Red laser temp LED Green Red laser bias LED Continued on next page 70312 Chapter 1 General Information Eguipment Description Continued Physical The ELLT is a full width module designed for the Laser Link II Mainframe Description Refer to the diagram below for an identification view of the ELLT 45 870 MHz POWER _ RF STATUS 7 OPTICAL POWER L LASER TEMP L LASER BIAS L FANL RF ATTENUATOR ADJUST SLOPE ADJUST OPTICAL POWER 1Vdc 10mW 10 dBmV CH N 70312 ELLT Installation And Operation Continued on next page 1 11 Chapter 1 General Information Eguipment Description Continued Functional The ELLT has two RF inputs A block diagram of the ELLT is shown below Description Slope Control gt Attenuator Control gt Optical Broadcast Input RF Signal N ails EIUS Output Control diode Narrowcast Input OO gt Laser RF Monitor Detector Alarms RF Test Point Supply A Power Supply B Supply Power Status Alarm 4 Power Status LED 4 4
32. ription 3 B 6 The table below describes the rear panel connectors Control Indicator RE IN 2 Narrowcast RF input F type connector RFIN 1 Broadcast RF input F type connector 3 POWER 15 pin D type connector Provides power and alarm connector to the LaserLink II mainframe power distribution board e Pin 1 GND e Pin 2 NC e Pin 3 NC e Pin 4 GOALN general alarm e Pin 5 Redundant power alarm e Pin 6 24 V dc supply A e Pin 7 24 V dc supply B e Pin 8 GND e Pin 9 NC e Pin 10 NC e Pin 11 Optical output power calibrated 1 V 10 mW e Pin 12 Laser bias current calibrated 1 V 50 mA Pin 13 LIM current limit alarm e Pin 14 24 V dc supply A e Pin 15 GND 4 pin connector Allows fan removal ELLT Installation and Operation 70312 Section C Status Monitoring Overview Introduction This section describes status monitoring for the ELLT In addition to the front panel LEDs the ELLT s vital parameters are also provided to the mainframe EMIC or user panel and to the mainframe telemetry port Depending on the configuration purchased the mainframe is shipped with either the EMIC or the user panel installed An EMIC upgrade kit is available Refer to the LaserLink II Mainframe manual In this Section This section contains the following topics User Panel EMIC Third Party 70312 ELLT Installation and Operation 3 C 1 Chapter 3 Setup and Operation User Panel Descripti
33. ts Overview How To Comment 70312 We welcome your comments on this manual User comments are an important source of ideas to improve our manuals You can contact us by mail or e mail By Mail By E mail Write to Send a message to ANTEC Network Technologies tech pubs antec com Attention Technical Publications 11450 Technology Circle Duluth GA 30097 ELLT Installation And Operation 1 3 Chapter 1 General Information Safety Overview Safety of personnel is the primary concern during all procedures This section describes typical safety considerations All of them may not apply to you or your installation operation environment Additional Your organization may have additional safety requirements These Requirements recommendations in no way supersede any safety requirements of your organization Admonishments Dangers warnings cautions and notes appear in the text immediately before the procedure step or other text to which they apply Observe all these admonishments The table below describes each category of admonishment Admonishment Category DANGER refers to a situation hazardous to personnel if the DANGER information in the DANGER is not observed Possible consequences are injury or death WARNING refers to a situation in which customer service may be WARNING interrupted if the WARNING is not observed CAUTION refers to a situation in which equipment may be damaged or CAUTION operationally
34. ube Do not shake the can Do not blow air directly on the fiber Failure to observe this caution may damage the connector or cause contaminates to be placed on the surface being cleaned Hold air can upright Position the can extension tube approximately 6 in 15 3 cm from the surface to be cleaned 2 Gently blow air across the connector end or surface to be cleaned Promptly insert connector into cleaned bulkhead adapter 70312 ELLT Installation and Operation 2 C 7 Chapter 2 Installation This Page Intentionally Blank END OF CHAPTER 2 C 8 ELLT Installation and Operation 70312 Chapter 3 Setup and Operation Overview Introduction This chapter describes how to set up and operate the Laser Link Enhanced Transmitter ELLT These procedures assume the ELLT is installed according to the procedures in Chapter 2 of this manual In this Chapter This chapter contains the following sections Activating the ELLT Controls and Indicators B Troubleshooting D D 70312 ELLT Installation and Operation 3 1 Chapter 3 Setup and Operation This Page Intentionally Blank 3 2 ELLT Installation and Operation 70312 Section A Activating the ELLT Overview Introduction This section describes activating the ELLT Activation consists of connecting the RF input signal to the ELLT When the input signal is connected the ELLT automatically produces an optical output In this Section This section conta
35. ued Labels 70312 A safety label is affixed to this equipment in plain view The safety label is shown below Chapter 1 General Information ANTEC ANTEC Network Technologies 5720 Peachtree Parkway Norcross GA 30092 U S A Invisible laser radiation Avoid direct exposure to beam operate only with proper optical fiber installed in connector Refer to user s manual This product complies with 21 CFR 1040 10 FDA Class 1B S N XXXXXXXXXXXXXXXX P N Manf Month Assembled in Manufacturing Site EAE ELLT Installation And Operation Chapter 1 General Information Eguipment Description Overview The ELLT family is composed of a tiered series of 1310 nm fiber optic transmitters that allow for targeted carrier to noise and distortion performance over varied loss budgets The low power versions of the product are designed for delivery of targeted services such as voice data and video on demand A second RF input provides added versatility in these narrowcast applications The medium and high power product fits into broader area and longer link budget applications such as headend consolidations The ELLT also has a second RF input port Product features are listed below Front Panel Accessible Test Points Front Panel Accessible Controls Front Panel Accessible Indicators Front Panel Accessible SC UPC or SC APC optical connector 1 10 ELLT Installation And Ope
36. ve the level of the RF input on RF IN 1 If the narrowcast input is not used terminate it with a 75 Ohm terminator 70312 ELLT Installation and Operation 3 A 3 Chapter 3 Setup and Operation RF Signal Input Slope Description 3 A 4 Due to the characteristic attenuation of the cable normally used between the headend combiner network and the optical transmission equipment a sloped RF input is often obtained The ELLT module is designed to compensate for 5 dB of cable loss approximately 100 feet If a tilt is present adjust the highest utilized frequency s RF level to the proper level shown in the RF signal input diagram and connect the 75 Ohm cable to the input port on the rear of the ELLT Do not over tighten the cable onto the connector Connect the spectrum analyzer to the 30 dB RF test point on the front of the laser Calibrate the spectrum analyzer display to establish a reference on the highest frequency carrier set as shown in the RF signal input diagram With the reference level established adjust the front panel slope and gain controls to obtain a flat response at that level Record the RF test point level for future reference and routine maintenance ELLT Installation and Operation 70312 Chapter 3 Setup and Operation Operation with Reduced Channel Load Description The RF input level to the ELLT can be increased with a reduced channel load to take advantage of an improved carrier to noise ratio CNR
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