Agilent 11982A Manual
Contents
1. 86106A or 86109A plug in module is recommended See Chapter 3 Time Domain Measurements for more information about eye pattern extinction ratio and impulse measurements 1 3 Connector Interfaces General Information Accessories Accessories Accessories The Agilent 11982A has a variety of connector interfaces available You must specify one of the following connector interfaces when ordering your Agilent 11982A Diamond HMS 10 Connector Interface Option 011 PC FC Connector Interface Option 012 DIN 47256 Connector Interface Option 013 ST Connector Interface Option 014 Biconic Connector Interface Option 015 1 4 General Information Agilent 11982A Specifications and Characteristics Agilent 11982A Specifications and Characteristics Table 1 1 lists specification characteristics typical performance and nomi nal values The distinction between these terms is described as follows Specifications describe warranted performance over the temperature range 0 to 55 C unless otherwise noted All specifications apply after the instru ment s temperature has been stabilized after 30 minutes of continuous opera tion Characteristics provide useful information by giving functional but nonwar ranted performance parameters Characteristics are printed in italics Typical Performance where listed is not warranted but indicates perfor mance which most units will meet Nominal2. Cleaning Connections for Accurate Measurements tions take repeatability uncertainty into account Will a connector degrade the return loss too much or will a fusion splice be re quired For example many DFB lasers cannot operate with reflections from connectors Often as much as 90 dB isolation is needed Connecting Body and Ferrule 2 5 mm Mechanical Retainer Fiber 125 um actual fiber s diameter is smaller than a human hair Alignment Key Figure 1 3 Basic components of a connector Over the last few years the FC PC style connector has emerged as the most popular connector for fiber optic applications While not the highest perform ing connector it represents a good compromise between performance reli ability and cost If properly maintained and cleaned this connector can withstand many repeated connections However many instrument specifications require tighter tolerances than most connectors including the FC PC style can deliver These instruments cannot tolerate connectors with the large non concentricities of the fiber common with ceramic style ferrules When tighter alignment is required Agilent Technologies instruments typically use a connector such as the Diamond HMS 10 which has concentric tolerances within a few tenths of a micron Agi lent Technologies then uses a special universal adapter which allows other cable types to mate with this precision connector See Figure 1 4 General Information
3. Setting the Line Voltage Selector Use the following procedure to set the Agilent 11982A s voltage selector to the voltage range 100 120 220 or 240 V corresponding to the available ac volt age Before connecting the lightwave converter to the power source you must set the rear panel voltage selector correctly to adapt the lightwave converter to the power source An improper selector setting can damage the lightwave converter when it is turned on 1 Pry open the fuse holder door with a small screwdriver 2 4 CAUTION Installation and Preparation for Use Preparing the Agilent 11982A for Use fusedr Figure 2 2 Opening the Fuse Holder Door You must remove the voltage tumbler to change the voltage selector Rotating the voltage tumbler while it is in the line module damages the line module Remove the voltage tumbler the voltage tumbler is not attached to the unit Replace the voltage tumbler so the desired line voltage value shows through the small opening in the fuse holder door Checking the Fuse The recommended fuse is a 0 5 A 250 V slow blow Agilent Technologies part number 2110 0202 The line fuse is housed in a small container next to the voltage tumbler see Figure 2 3 on page 2 6 The spare fuse is stored below the line fuse To check the fuse insert the tip of a screwdriver on the side of the container and gently pull outward to remove the container If the fuse is defective or missing
4. Information Agilent 11982A Specifications and Characteristics Table 1 2 Agilent 11982A Specifications and Characteristics GENERAL SPECIFICATIONS Temperature Range Operating 0 C to 55 C Storage 40 C to 55 C EMI Compatibility Conducted and radiated emissions are in compliance with the requirements of FTZ 1046 CISPR Pub 11 1975 and MIL STD 461C Part 7 Methods CE03 and REO2 Power Requirements 100 120 220 or 240 Vac 10 47 to 63 Hz Power consumption 75 VA Weight 3 76 kg 8 4 Ib Dimensions 213 mm 8 39 inch 102 mm 4 02 inch C 368 mm 14 49 inch Jg up L REAR B FRONT PANEL INPUT OUTPUT Optical Input Connector Single mode fiber connectors Diamond HMS 10 FC PC front panel ST Biconic or DIN Output Connector APC 3 5 mm male 500 nominal front panel 1 7 General Information Serial Numbers Serial Numbers Agilent Technologies makes frequent improvements to its products to enhance their performance usability or reliability and to control costs Agi lent Technologies service personnel have access to complete records of design changes to each type of equipment based on the equipment s serial number Whenever you contact Agilent Technologies about your lightwave converter have the complete serial number available to ensure obtaining the most com plete and accurate information possible A mylar serial number label is attached to th
5. OUT connector is no excep tion When you use improper cleaning and handling techniques you risk expensive instrument repairs damaged cables and compromised measurements Before you connect any fiber optic cable to the Agilent 119824 refer to Cleaning Con nections for Accurate Measurements on page 1 9 iv Contents General Information Description of the Agilent 11982A Lightwave Converter 1 2 Accessories 1 4 Agilent 11982A Specifications and Characteristics 1 5 Serial Numbers 1 8 Cleaning Connections for Accurate Measurements 1 9 Electrostatic Discharge Information 1 19 Installation and Preparation for Use Preparing the Agilent 11982A for Use 2 2 Power Cords 2 7 Turning on the Agilent 11982A 2 9 Time Domain Measurements Connecting the Agilent 11982A to an Oscilloscope 3 Z Changing the Oscilloscope Display Units to Watts of Optical Power 3 4 Verification and Service Information Performing a Verification Check of the Agilent 11982A 4 2 Returning the Instrument for Service 4 4 Agilent Technologies Service Offices 4 7 Service Information 4 8 Contents 1 Description of the Agilent 11982A Lightwave Converter 1 2 Accessories 1 4 Agilent 11982A Specifications and Characteristics 1 5 Serial Numbers 1 8 Cleaning Connections for Accurate Measurements 1 9 Electrostatic Discharge Information 1 19 General Information General Information Description of the Agilent 11982A Lightwave Converter Des
6. Type did Part Plug Description Color Country 250V 8120 4211 Straight SABS164 79 200 Jade Gray Republic of South 81204600 90 79 200 pula India 100V 8120 4753 Straight MITI 90 230 Dark Gray Japan 8120 4754 90 90 230 Part number shown for plug is the industry identifier for the plug only Number shown for cable is the Agilent Technologies part number for the complete cable including the plug 2 8 Installation and Preparation for Use Turning on the Agilent 11982A Turning on the Agilent 11982A With the power cable inserted into the line module turn the lightwave con verter unit on by pressing the line switch The green light emitting diode LED should light If the LED should fail to light see Chapter 4 Verification and Service Information 11982A LIGHTPAVE CONVERTER 1200 1600nm CRF OUTPUT OPTICAL INPUT Figure 2 4 The Agilent 11982A Front Panel Table 2 4 Agilent 11982A Front Panel Features Index Number Description Line Switch Light emitting diode LED RF OUTPUT connector OPTICAL INPUT connector with the interface connector removed on e co N gt Ferrule 2 9 Connecting the Agilent 11982A to an Oscilloscope 8 2 Changing the Oscilloscope Display Units to Watts of Optical Power 8 4 Time Domain Measurements Time Domain Measurements Connecting the Agilent 11982A to an Oscilloscope Connecting the Agilent 11982A to an Oscilloscope To connect
7. all optical sources before disconnecting fiber optic cables Failure to do may result in permanent injury to your eyes Cleaning Connectors The procedures in this section provide the proper steps for cleaning fiber optic cables and Agilent Technologies universal adapters The initial cleaning using the alcohol as a solvent gently removes any grit and oil If a caked on layer of material is still present this can happen if the beryllium copper sides of the ferrule retainer get scraped and deposited on the end of the fiber during insertion of the cable a second cleaning should be performed It is not uncommon for a cable or connector to require more than one cleaning Agilent Technologies strongly recommends that index matching compounds not be applied to their instruments and accessories Some compounds such as gels may be difficult to remove and can contain damaging particulates If you think the use of such compounds is necessary refer to the compound manufacturer for information on application and cleaning procedures Table 1 3 Cleaning Accessories Item Agilent Part Number Pure isopropyl alcohol Cotton swabs 8520 0023 Small foam swabs 9300 1223 Compressed dust remover non residue 8500 5262 CAUTION General Information Cleaning Connections for Accurate Measurements Table 1 4 Dust Caps Provided with Lightwave Instruments Item Agilent Part Number Laser shutter cap 08145 64521 FC PC dust
8. can be pushed onto the glass surface Scratches fiber movement or glass contamina tion will cause loss of signal and increased reflections resulting in poor return loss Inspecting Connectors Because fiber optic connectors are susceptible to damage that is not immedi ately obvious to the naked eye poor measurements result without the user being aware Microscopic examination and return loss measurements are the best way to ensure good measurements Good cleaning practices can help ensure that optimum connector performance is maintained With glass to glass interfaces any degradation of a ferrule or the end of the fiber any stray particles or finger oil can have a significant effect on connector performance Where many repeat connections are required use of a connector saver or patch cable is recommended Figure 1 6 shows the end of a clean fiber optic cable The dark circle in the center of the micrograph is the fiber s 125 um core and cladding which carries the light The surrounding area is the soft nickel silver ferrule Figure 1 7 shows a dirty fiber end from neglect or perhaps improper cleaning Material is smeared and ground into the end of the fiber causing light scattering and poor reflection Not only is the precision polish lost but this action can grind off the glass face and destroy the connector Figure 1 8 shows physical damage to the glass fiber end caused by either repeated connections made without removing loose p
9. cap 08154 44102 Biconic dust cap 08154 44105 DIN dust cap 5040 9364 HMS10 dust cap 5040 9361 ST dust cap 5040 9366 To clean a non lensed connector Do not use any type of foam swab to clean optical fiber ends Foam swabs can leave filmy deposits on fiber ends that can degrade performance Apply pure isopropyl alcohol to a clean lint free cotton swab or lens paper Cotton swabs can be used as long as no cotton fibers remain on the fiber end after cleaning Clean the ferrules and other parts of the connector while avoiding the end of the fiber 3 Apply isopropyl alcohol to a new clean lint free cotton swab or lens paper Clean the fiber end with the swab or lens paper Do not scrub during this initial cleaning because grit can be caught in the swab and become a gouging element Immediately dry the fiber end with a clean dry lint free cotton swab or lens paper Blow across the connector end face from a distance of 6 to 8 inches using filtered dry compressed air Aim the compressed air at a shallow angle to the fiber end face Nitrogen gas or compressed dust remover can also be used CAUTION General Information Cleaning Connections for Accurate Measurements Do not shake tip or invert compressed air canisters because this releases particles in the can into the air Refer to instructions provided on the compressed air canister As soon as the connector is dry connect or cover it for later use If the pe
10. install a new fuse in the proper position and reinsert the fuse container 2 5 Installation and Preparation for Use Preparing the Agilent 11982A for Use 220Vod Yac 120Voc Figure 2 3 Selecting the Line Voltage Value and Checking the Fuse WARNING Power Cable The lightwave converter is equipped with a three wire power cable in accor dance with international safety standards When connected to an appropriate power line outlet this cable grounds the instrument cabinet Failure to ground the lightwave converter properly can result in personal injury Before turning on the lightwave converter you must connect its protective earth terminals to the protective conductor of the main power cable Insert the main power cable plug only into a socket outlet that has a protective earth contact DO NOT defeat the earth grounding protection by using an extension cable power cable or autotransformer without a protective ground conductor If you are using an autotransformer make sure its common terminal is connected to the protective earth contact of the power source outlet socket Various power cables are available to connect the lightwave converter to the types of ac power outlets unique to specific geographic areas The cable appropriate for the area to which the lightwave converter is originally shipped is included with the unit You can order additional ac power cables for u
11. instrument Cover all front or rear panel connectors that were originally covered when you first received the instrument Cover electrical connectors to protect sensitive components from electrostatic damage Cover optical connectors to protect them from damage due to physical contact or dust Instrument damage can result from using packaging materials other than the original materials Never use styrene pellets as packaging material They do not adequately cushion the instrument or prevent it from shifting in the carton They may also cause instrument damage by generating static electricity Pack the instrument in the original shipping containers Original materials are available through any Agilent Technologies office Or use the following guidelines Wrap the instrument in antistatic plastic to reduce the possibility of damage caused by electrostatic discharge e For instruments weighing less than 54 kg 120 Ib use a double walled cor rugated cardboard carton of 159 kg 350 Ib test strength The carton must be large enough to allow approximately 7 cm 3 inches on all sides ofthe instrument for packing material and strong enough to accom modate the weight of the instrument e Surround the equipment with approximately 7 cm 8 inches of packing ma terial to protect the instrument and prevent it from moving in the carton If packing foam is not available the best alternative is S D 240 Air Cap from 4 5 Verif
12. or plan the warranty is at the front of this manual If the lightwave converter is no longer under warranty or is not covered by an Agilent Technologies mainte nance plan Agilent Technologies will notify you of the cost of the repair after examining the unit See Returning the Instrument for Service on page 4 4 for more information Repair it yourself See Service Information on page 4 8 4 3 Verification and Service Information Returning the Instrument for Service Returning the Instrument for Service The instructions in this section show you how to properly return the instru ment for repair or calibration Always call the Agilent Technologies Instrument Support Center first to initiate service before returning your instrument to a service office This ensures that the repair or calibration can be properly tracked and that your instrument will be returned to you as quickly as possi ble Call this number regardless of where you are located Refer to Agilent Technologies Service Offices on page 4 7 for a list of service offices Agilent Technologies Instrument Support Center 800 403 0801 If the instrument is still under warranty or is covered by an Agilent Technolo gies maintenance contract it will be repaired under the terms of the warranty or contract the warranty is at the front of this manual If the instrument is no longer under warranty or is not covered by an Agilent Technologies mainte
13. pin of any connector and before removing any assembly from the unit Be sure that all instruments are properly earth grounded to prevent a buildup of static charge 1 20 Test Equipment Use and ESD General Information Electrostatic Discharge Information Before connecting any coaxial cable to an instrument connector for the first time each day momentarily short the center and outer conductors of the cable together Personnel should be grounded with a 1 MQ resistor isolated wrist strap before touching the center pin of any connector and before removing any assembly from the instrument Be sure that all instruments are properly earth grounded to prevent build up of static charge Table 1 5 on page 1 21 lists static safe accessories that can be obtained from Agilent Technologies by using the Agilent part numbers shown Static Safe Accessories Table 1 5 Static Safe Accessories Agilent Part Number Description 9300 0797 Set includes 3M static control mat 0 6 mx 1 2 m 2 ft x 4 ft and 4 6 cm 15 ft ground wire The wrist strap and wrist strap cord are not included They must be ordered separately 9300 0980 Wrist strap cord 1 5 m 5 ft 9300 1383 Wrist strap color black stainless steel without cord has four adjustable links and a 7 mm post type connection 9300 1169 ESD heel strap reusable 6 to 12 months 1 21 Preparing the Agilent 11982A for Use 2 2 Initial Inspection 2 2 Connectin
14. power source outlet socket The lightwave converter input circuitry can be damaged by power levels that exceed the maximum safe input level specifications Table 1 1 on page 1 6 provides the input specifications To prevent input damage these specified levels must not be exceeded Electrostatic discharge ESD can damage or destroy electronic components work on electronic assemblies should be performed at a static safe work station See Electrostatic Discharge Information on page 1 19 for more infor mation on preventing ESD Table 4 1 on page 4 10 lists the tools that may be required to service the Agilent 11982A 4 9 WARNING Verification and Service Information Service Information Table 4 1 Required Tools Description Agilent Part Number Check Digit Small Pozidriv screwdriver 8710 0899 0 Large Pozidriv screwdriver 8710 0900 4 Wire cutter 8710 0012 9 Long nose pliers 8710 0030 1 5 16 nut driver 8720 0015 3 3 8 nut driver 8720 0005 1 7 mm nut driver 8710 1217 8 Adjustment Procedure The only adjustment for the Agilent 11982A is the 5 7 V dc voltage supply To adjust the power supply use an Agilent 3456A digital multimeter or equiva lent to measure the dc output voltage at the power supply terminals If the dc output voltage is not within tolerance adjust the power supply Only trained service personnel should perform measurements inside the instrument chassis Use extreme care the expose
15. 0 01 735 7200 01 344 366666 800 403 0801 4 7 Serial Number Information Manual Updating Supplement Verification and Service Information Service Information Service Information This section describes how to service the Agilent 119824 It contains the fol lowing service information General Information Adjustment Procedure Troubleshooting Replacement Procedures Replaceable Parts General Information Whenever you contact Agilent Technologies about your lightwave converter have the complete serial number and option designation available This will ensure that you obtain accurate service information See Serial Numbers on page 1 8 for more information Manual Updating Supplements are periodically produced by the Agilent Tech nologies to maintain manual accuracy The updating supplement provides ser vice information that has not yet been incorporated into a revised manual If a Manual Updating Supplement has been produced for a specific version of the manual it will be shipped with the manual Any changes that affect information in this manual are documented in the Manual Updating Supplement for this manual This may include information for instruments manufactured after this manual was printed The Manual Updating Supplement may also contain information for correcting errors in the manual To keep your manual as accurate as possible periodically request the latest Manual Updating Supplement from yo
16. 448 ii CAUTION CAUTION CAUTION CAUTION CAUTION CAUTION General Safety Considerations Before switching on this instrument make sure that the line voltage selector switch is set to the line voltage of the power supply and the correct fuse is installed Assure the supply voltage is in the specified range This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 1010 and 664 respectively VENTILATION REQUIREMENTS When installing the product in a cabinet the convection into and out of the product must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature of the product by 4 C for every 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Always use the three prong ac power cord supplied with this instrument Failure to ensure adequate earth grounding by not using this cord may cause instrument damage Do not connect ac power until you have verified the line voltage is correct Damage to the equipment could result This instrument has autoranging line voltage input Be sure the supply voltage is within the specified range Measurement accuracy it s up to you Fiber optic connectors are easily damaged when connected to dirty or damaged cables and accessories The Agilent 11982A front panel OPTICAL
17. 982 00003 9 INSULATOR 4 11982 00004 0 DECK 5 5021 5830 5 SIDE STRUT 6 5086 7863 4 PHOTODETECTOR AND ELECTRICAL AMPLIFIER UNIT 7 08673 60040 9 RF CONNECTOR 8 11982 00001 7 FRONT PANEL DRESS 9 1990 1238 8 LED GREEN 85680 40004 6 LED MOUNT NOT SHOWN 0 5001 0538 8 TRIM SIDE 1 5021 8413 6 FRONT FRAME 11982 00002 8 FRONT PANEL SUB NOT SHOWN 2 5041 8803 0 TRIM TOP 3 5062 3805 6 SIDE COVER 4 11982 20002 0 CABLE RF 5 11982 60001 3 DC CABLE ASSEMBLY INCLUDES THE RF COAX CABLE 6 0950 2099 6 POWER SUPPLY 7 11982 60002 4 AC CABLE ASSEMBLY INCLUDES THE LINE SWITCH AND LINE MODULE 5041 8801 8 FOOT BOTTOM FRONT NOT SHOWN 1460 1345 5 TILT STANDS FOR FRONT FEET NOT SHOWN 5041 8822 3 FOOT BOTTOM REAR NOT SHOWN 5062 3729 3 TOP COVER NOT SHOWN 5062 3887 4 BOTTOM COVER NOT SHOWN 2110 0202 1 FUSE NOT SHOWN 0890 0732 2 SHRINK TUBING NOT SHOWN 1400 0249 0 TY RAP NOT SHOWN 4 19 Verification and Service Information Service Information 4 PLACES 4 PLACES 4 PLACES 4 PLACES 6 PLACES 4 PLACES Figure 4 5 Agilent 11982A Replaceable Hardware 2 PLACES 2 PLACES 7X8 6 5 Ms Figure 4 6 Back of Front Frame 4 20 Table 4 7 Replaceable Hardware Verification and Service Information Service Information d Agilent Part Number CD Description 1 0515 1331 5 SCREW MACH M4 0 X 6MM FLAT HD 2 0515 0866 9 SCREW MACH M3 0 X 8MM PAN HD 3 0515 1090 3 SCREW MA
18. Agilent 11982 Amplified Lightwave Converter Operation and Service Manual Agilent Technologies O Copyright Agilent Technologies 2000 Rights Reserved Repro duction adaptation or trans lation without prior written permission is prohibited except as allowed under copy right laws Agilent Part No 11982 90014 Printed in USA July 2000 Agilent Technologies Lightwave Division 1400 Fountaingrove Parkway Santa Rosa CA 95403 1799 USA 707 577 1400 Notice The information contained in this document is subject to change without notice Com panies names and data used in examples herein are ficti tious unless otherwise noted Agilent Technologies makes no warranty of any kind with regard to this material includ ing but not limited to the implied warranties of mer chantability and fitness for a particular purpose Agilent Technologies shall not be lia ble for errors contained herein or for incidental or conse quential damages in connec tion with the furnishing performance or use of this material Restricted Rights Legend Use duplication or disclo sure by the U S Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 for DOD agencies and sub paragraphs c 1 and c 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 for other agencies Warra
19. CH M3 5 X 8MM PAN HD 4 0515 0889 6 SCREW MACH M3 5 X 6MM FLAT HD 5 0380 0019 7 STANDOFFS NUTS AND LOCK WASHERS ARE INCLUDED WITH THE AC CABLE ASSEMBLY 6 0535 0082 3 HEX NUT WITH LOCK WASHER 7 MM 7 2190 0016 3 LOCK WASHER 8 2950 0001 8 HEX NUT 3 8 X 32 4 21 Index A ac power cables 2 6 accessories connector interfaces 1 4 shipped with the lightwave converter 2 3 adjustment procedure 4 10 Agilent Technologies maintenance contract 4 3 offices 4 7 assembly level replaceable parts 4 18 B before servicing the Agilent 11982A 4 3 Biconic connector interface 1 4 C cabinet cleaning iii changing the oscilloscope display units to watts 3 4 characteristics 1 5 check digit 4 16 checking the fuse 2 5 classification product iii cleaning adapters 1 18 cabinet iii fiber optic connections 1 9 1 17 non lensed connectors 1 17 compressed dust remover 1 16 connecting the Agilent 11982A to an oscillo scope 3 2 connector care 1 9 interfaces 1 4 cotton swabs 1 16 crowbar overvoltage mode 4 11 current limiting 4 11 D description Agilent 11982A lightwave converter 1 2 Diamond connector interface 1 4 DIN 47256 connector interface 1 4 dust caps 1 17 E electrostatic discharge 1 19 accessories 1 19 precautions 1 19 protection 1 19 EMI compatibility 1 7 ESD 1 19 reducing damage caused by ESD 1 20 static safe work station 1 19 F fiber optics cleaning connec
20. Cleaning Connections for Accurate Measurements Figure 1 4 Universal adapters to Diamond HMS 10 The HMS 10 encases the fiber within a soft nickel silver Cu Ni Zn center which is surrounded by a tough tungsten carbide casing as shown in Figure 1 5 Staking Groove Fixing oper Secondary Staking Active Centering Tun gsten Carbide Nickel Silver Hard Case Soft center 4 125 um Fiber Centered to abou 0 2 microns Figure 1 5 Cross section of the Diamond HMS 10 connector The nickel silver allows an active centering process that permits the glass fiber to be moved to the desired position This process first stakes the soft nickel silver to fix the fiber in a near center location then uses a post active staking to shift the fiber into the desired position within 0 2 um This process plus the keyed axis allows very precise core to core alignments This connector is found on most Agilent Technologies lightwave instruments General Information Cleaning Connections for Accurate Measurements The soft core while allowing precise centering is also the chief liability of the connector The soft material is easily damaged Care must be taken to mini mize excessive scratching and wear While minor wear is not a problem if the glass face is not affected scratches or grit can cause the glass fiber to move out of alignment Also if unkeyed connectors are used the nickel silver
21. TE Consult the oscilloscope documentation for information about calibrating and operating the oscilloscope 3 3 Time Domain Measurements Changing the Oscilloscope Display Units to Watts of Optical Power Changing the Oscilloscope Display Units to Watts of Optical Power Since an oscilloscope displays voltage a conversion factor must be used so the oscilloscope read out is in watts For the oscilloscope to display optical power the voltage responsivity also called the conversion gain of the Agilent 11982A must be taken into account The probe attenuation field is not available with some oscilloscopes The oscilloscope display can still be con verted to watts by dividing the oscilloscope s reading in volts by the respon sivity To change the oscilloscope s display units to watts you must perform the fol lowing steps Determine the responsivity of your Agilent 11982A for the wavelength of the source The responsivity of the Agilent 11982A is on the Agilent 11982A Calibration Chart shipped with your instrument and shown in Figure 3 1 on page 3 5 The responsivity is calibrated at two wavelengths 1300 nm and 1550 nm Determine the reciprocal of the responsivity Enter the reciprocal of the responsivity in the oscilloscope s probe attenuation field 3 4 Time Domain Measurements Changing the Oscilloscope Display Units to Watts of Optical Power S N 0 0 11 Cal Date 13 1990 Frequency Response Rela
22. Value indicates the expected but not warranted value of the param eter 1 5 General Information Agilent 11982A Specifications and Characteristics Table 1 1 Agilent 11982A Specifications and Characteristics Wavelength Range characteristic Bandwidth characteristic Full Width Half Maximum Calculated from FWHM 0 44 BW optical Conversion Gain dc responsivity Accuracy of provided value Noise Equivalent Power characteristic Input Return Loss characteristic with HMS 10 connector Aberrations characteristic Corrected RF Frequency Response dc to 22 GHz 20 to 30 C 0 to 55 C Harmonic Distortion Output lt 10 dBm Maximum Safe Optical Input Power Average Maximum Operating Optical Input Power Peak Output Voltage Range nto 50Q Output Offset Voltage nto 50Q Output Electrical Return Loss characteristic 0 1 to 12 GHz 12 to 22 GHz 1 200 nm to 1 600 nm dc to 15 GHz optical dc to 11 GHz electrical 29 4 ps 200 V W 300 V W nominal 20 30 pW JHz 23 dB 20 peak to peak 2 2 dB 24 7 dB 41 dB below fundamental 10 mW 10 dBm 1 5 mW 41 76 dBm 700mV 1mV 11 dB 9 gB a Plus or minus the connector variation b Equivalent to 3 7 UW in a 15 GHz bandwidth C Corrections can be obtained from the lightwave personality ROM card or the Agilent 11982A Calibration Chart d Refers to electrical power units 1 6 General
23. a freshly cleaned connector make the measurement and then immediately clean it off Never use a gel for longer term connections and never use it to improve a damaged connector The gel can mask the extent of damage and continued use of a damaged fiber can transfer damage to the instrument When inserting a fiber optic cable into a connector gently insert it in as straight a line as possible Tipping and inserting at an angle can scrape material off the inside of the connector or even break the inside sleeve of connectors made with ceramic material When inserting a fiber optic connector into a connector make sure that the fi ber end does not touch the outside of the mating connector or adapter e Avoid over tightening connections Unlike common electrical connections tighter is not better The purpose of the connector is to bring two fiber ends together Once they touch tightening only causes a greater force to be applied to the delicate fibers With connec tors that have a convex fiber end the end can be pushed off axis resulting in misalignment and excessive return loss Many measurements are actually improved by backing off the connector pressure Also if a piece of grit does happen to get by the cleaning procedure the tighter connection is more likely to damage the glass Tighten the connectors just until the two fibers touch General Information Cleaning Connections for Accurate Measurements Keep connectors covered wh
24. articles or using improper cleaning tools When severe the damage of one connector end can be transferred to another good connector endface that comes in contact with the damaged one Periodic checks of fiber ends and replacing connecting cables after many connections is a wise practice The cure for these problems is disciplined connector care as described in the following list and in Cleaning Connectors on page 1 16 General Information Cleaning Connections for Accurate Measurements Use the following guidelines to achieve the best possible performance when making measurements on a fiber optic system Never use metal or sharp objects to clean a connector and never scrape the connector Avoid matching gel and oils 1 o Figure 1 6 Clean problem free fiber end and ferrule gt 5 t Ee Figure 1 7 Dirty fiber end and ferrule from poor cleaning 1 18 General Information Cleaning Connections for Accurate Measurements lt EOS A Figure 1 8 Damage from improper cleaning While these often work well on first insertion they are great dirt magnets The oil or gel grabs and holds grit that is then ground into the end of the fiber Also some early gels were designed for use with the FC non contacting con nectors using small glass spheres When used with contacting connectors these glass balls can scratch and pit the fiber If an index matching gel or oil must be used apply it to
25. chnologies specifically dis claims the implied warranties of merchantability and fitness for a particular purpose Exclusive Remedies The remedies provided herein are buyer s sole and exclusive remedies Agilent Technolo gies shall not be liable for any direct indirect special inci dental or consequential dam ages whether based on contract tort or any other legal theory Safety Symbols CAUTION The caution sign denotes a hazard It calls attention to a procedure which if not cor rectly performed or adhered to could result in damage to or destruction of the product Do not proceed beyond a cau tion sign until the indicated conditions are fully under stood and met WARNING The warning sign denotes a hazard It calls attention to a procedure which if not cor rectly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met The instruction man A ual symbol The prod uct is marked with this warning symbol when it is necessary for the user to refer to the instructions in the manual The laser radiation symbol This warning symbol is marked on products which have a laser output The AC symbol is used to indicate the required nature of the line module input power The ON symbols are used to mark the posi tions of the instrument power line switch n O The OFF symbols are us
26. cription of the Agilent 11982A Lightwave Converter The Agilent 11982A lightwave converter converts an optical signal to an elec trical signal The Agilent 11982A combines a PIN photodetector for the opti cal to electrical conversion The electrical signal is amplified with a low noise preamplifier The Agilent 11982A provides a general purpose optical to elec trical converter for lightwave frequency domain and time domain measure ments and can be used with oscilloscopes spectrum analyzers and network analyzers The Agilent 11982A covers the wavelengths from 1200 to 1600 nm with dc to 15 GHz optical modulating bandwidth Its 300 volts watt nominal conver sion gain and 0 05 input optical reflections significantly improves sensitivity for characterizing lightwave devices Each converter comes with a calibration chart of instrument specific data for frequency response and responsivity to enable correct and accurate measurements Figure 1 1 Agilent 11982A Lightwave Converter 1 2 General Information Description of the Agilent 11982A Lightwave Converter Frequency Domain Measurements with the Agilent 11982A Used with an electrical spectrum analyzer the Agilent 11982A displays optical modulation power as a function of frequency Intensity modulation distortion and laser intensity noise can also be displayed and measured Using fre quency response corrections you can predict and observe the effects of laser modulation o
27. d terminals on the power supply transformer carry ac line voltage you can be killed or seriously injured if you contact them when power is applied On the power supply board connect the multimeter between the OUT terminal ground and the terminal of E2 on the dc power supply Measure the power supply output voltage The voltage reading should be 5 7 V dc 50 mV Note The 5 V power supply circuit has current limiting and overvoltage control If the 5 V power supply is adjusted above 5 8 V approximate the 5 V power supply will shut down 4 10 Verification and Service Information Service Information 3 Ifthe voltage reading is not 45 7 V dc adjust the 5V ADJ potentiometer R12 The Photodetector and the Electrical Amplifier Unit Troubleshooting the Power Supply for a reading of 45 7 V dc 50 mV Troubleshooting The main functional blocks of the Agilent 11982A are the power supply the photodetector and the electrical amplifier unit PHOTODE TECTOR AND ELECTRICAL AMPL IF IER DC TO 22 GHz PREAMPL IF IER Q RF OUTPUT DETECTOR y BIAS LINE FUSE AND LINE FILTER Figure 4 1 Agilent 11982A Block Diagram Modulated light enters the photodetector through a single mode fiber front panel connector Light is collimated then focused onto a PIN photodetector Photons are absorbed in the photodetector Electron hole pairs are generated by the light which produces the photoc
28. e rear of the lightwave converter It contains the serial number and the options installed in the lightwave con verter The serial number has two parts the prefix the first four numbers and a letter and the suffix the last five numbers See Figure 1 2 PREF IX COUNTRY OF ORIGIN i a SER 3013A00053 Figure 1 2 Typical Serial Number Label The first four numbers of the prefix are a code that identifies the date of the last major design change that is incorporated in your lightwave converter The letter identifies the country in which the unit was manufactured The five digit suffix is a sequential number and is different for each unit The option section of the serial label contains the option number s of the lightwave converter option s Whenever you specify the serial number or refer to it in obtaining information about your lightwave converter be sure to use the complete number includ ing the full prefix and the suffix 1 8 General Information Cleaning Connections for Accurate Measurements Cleaning Connections for Accurate Measurements Today advances in measurement capabilities make connectors and connec tion techniques more important than ever Damage to the connectors on cali bration and verification devices test ports cables and other devices can degrade measurement accuracy and damage instruments Replacing a dam aged connector can cost thousands of dollars not to mention lost time This e
29. ed to mark the positions of the instru ment power line switch The CE mark is a reg istered trademark of the European Commu nity The CSA mark is reg istered trademark of the Canadian Stan dards Association The C Tick mark is a registered trademark of the Australian Spec trum Management Agency This text denotes the instrument is an Industrial Scientific and Medical Group 1 Class A product ISM1 A Typographical Conven tions The following conventions are used in this book Key type for keys or text located on the keyboard or instrument Softkey type for key names that are displayed on the instru ment s screen Display type for words or characters displayed on the computer s screen or instru ment s display User type for words or charac ters that you type or enter Emphasis type for words or characters that emphasize some point or that are used as place holders for text that you type il WARNING WARNING WARNING WARNING WARNING General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publica tion 61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use and has been supplied in a safe condition The instruction documentation contains information and warnings that must be followed by the user to ensure safe opera
30. en not in use Use fusion splices on the more permanent critical nodes Choose the best con nector possible Replace connecting cables regularly Frequently measure the return loss of the connector to check for degradation and clean every connec tor every time connectors should be treated like the high quality lens of a good camera The weak link in instrument and system reliability is often the inappropriate use and care of the connector Because current connectors are so easy to use there tends to be reduced vigilance in connector care and cleaning It takes only one missed cleaning for a piece of grit to permanently damage the glass and ruin the connector Measuring insertion loss and return loss Consistent measurements with your lightwave equipment are a good indica tion that you have good connections Since return loss and insertion loss are key factors in determining optical connector performance they can be used to determine connector degradation smooth polished fiber end should pro duce a good return loss measurement The quality of the polish establishes the difference between the PC physical contact and the Super PC con nectors Most connectors today are physical contact which make glass to glass connections therefore it is critical that the area around the glass core be clean and free of scratches Although the major area of a connector excluding the glass may show scratches and wear if the glass has
31. fication and Service Information Service Information Unsolder the connections to the dc power supply Remove the four screws that attach the power supply to the chassis Use Figure 4 3 and Table 4 5 when installing a new power supply Figure 4 3 Wiring Diagram for the Power Supply Terminals Table 4 5 DC Power Supply Terminal Connections Index Number Cable Attachment Cable Color 1 E2 OUT to the photodetector and electrical amplifier Red unit 2 OUT to the photodetector and electrical amplifier Green unit 3 E2 OUT to COM Black 4 RF coax cable shielding to E2 00 RF coax cable inner conductor to E2 OUT ni 5 4OUT to LED anode Orange 6 E1 COM to LED cathode Yellow 4 15 Replaceable Parts Table Format Verification and Service Information Service Information Replaceable Parts This section contains information for identifying and ordering replacement assemblies and mechanical parts for the Agilent 11982A lightwave converter Table 4 6 on page 4 19 lists information for each major assembly and for each major mechanical and electrical part that is not part of a major assembly Table 4 7 on page 4 21 lists information for the Agilent 11982A replaceable hardware The following information is listed in Table 4 6 and Table 4 7 Item number of callout in Figure 4 4 on page 4 18 Figure 4 5 on page 4 20 or Figure 4 6 on page 4 20 2 Agilent Technologies part number 3 Part number check d
32. g the Agilent 11982A to a Power Source 2 4 Power Requirements 2 4 Setting the Line Voltage Selector 2 4 Checking the Fuse 2 5 Power Cable 2 6 Power Cords 2 7 Turning on the Agilent 11982A 2 9 Installation and Preparation for Use Installation and Preparation for Use Preparing the Agilent 11982A for Use Preparing the Agilent 11982A for Use Initial Inspection Inspect the Agilent 11982A shipping container for damage If the shipping container or cushioning material is damaged keep it until you have verified that the contents are complete and you have tested the lightwave converter mechanically and electrically The Agilent 11982A is packed within a carton as shown in Figure 2 1 on page 2 3 Table 2 1 on page 2 3 contains the description and part numbers of the packaging materials Table 2 2 on page 2 3 contains the accessories shipped with the lightwave converter If the contents are incomplete or if the lightwave converter does not pass the verification test this procedure is pro vided in Chapter 4 Verification and Service Information notify the nearest Agilent Technologies office If the shipping container is damaged or the cush ioning material shows signs of stress also notify the carrier Keep the shipping materials for the carrier s inspection The Agilent Technologies office will arrange for repair or replacement without waiting for a claim settlement If the shipping materials are in good condition retain them for p
33. ication and Service Information Returning the Instrument for Service Sealed Air Corporation Commerce California 90001 Air Cap looks like a plastic sheet filled with air bubbles Use the pink antistatic Air Cap M to reduce static electricity Wrapping the instrument several times in this ma terial will protect the instrument and prevent it from moving in the carton 4 Seal the carton with strong nylon adhesive tape 5 Mark the carton FRAGILE HANDLE WITH CARE 6 Retain copies of all shipping papers 4 6 Verification and Service Information Agilent Technologies Service Offices Agilent Technologies Service Offices Before returning an instrument for service call the Agilent Technologies Instrument Support Center at 800 403 0801 visit the Test and Measurement Web Sites by Country page at http www tm agilent com tmo country English index html or call one of the numbers listed below Agilent Technologies Service Numbers Austria Belgium Brazil China Denmark Finland France Germany India Italy Ireland Japan Korea Mexico Netherlands Norway Russia Spain Sweden Switzerland United Kingdom United States and Canada 01 25125 7171 32 2 778 37 71 11 7297 8600 86 10 6261 3819 45 99 12 88 358 10 855 2360 01 69 82 66 66 0180 524 6330 080 34 35788 39 02 9212 2701 01 615 8222 81 426 56 7832 82 2 3770 0419 5 258 4826 020 547 6463 22 T3 57 59 7 095 797 3930 34 91 631 1213 08 5064 870
34. igit CD 4 Description of the assembly Part Ordering Information To order an assembly or mechanical part listed in this chapter quote the Agi lent Technologies part number and the check digit and indicate the quantity required The check digit is used to verify the correct part number The check digit will ensure accurate processing of your order To order a part that is not listed include the following information with the order Lightwave converter model number Lightwave converter serial number Description of where the part is located what it looks like and its function if known Quantity needed Parts can be ordered by addressing the order to the nearest Agilent Technolo gies office Customers within the USA can also use either the direct mail order system or the direct phone order system described below The direct phone order system has a toll free phone number available 4 16 Direct Mail Order System Direct Phone Order System Regular Orders Hotline Orders Verification and Service Information Service Information Within the USA Agilent Technologies can supply parts through a direct mail order system Advantages of using the system are as follows Direct ordering and shipment from Agilent Technologies No maximum or minimum on any mail order There is a minimum order amount for parts ordered through a local Agilent Technologies office when the orders require billing and invoicing P
35. ion Electrostatic discharge ESD can damage or destroy electronic components work on electronic assemblies should be performed at a static safe work station Figure 1 10 shows an example of a static safe work station using two types of ESD protection Conductive table mat and wrist strap combination Conductive floor mat and heel strap combination Both types when used together provide a significant level of ESD protection Of the two only the table mat and wrist strap combination provides adequate ESD protection when used alone To ensure user safety the static safe accessories must provide at least 1 of isolation from ground Refer to Table 1 5 on page 1 21 for information on ordering static safe accessories These techniques for a static safe work station should not be used when working on circuitry with a voltage potential greater than 500 volts General Information Electrostatic Discharge Information Building Ground 1 Meg Ohm Resistor Resistor Floor Mat Figure 1 10 Example of a Static Safe Work Station Reducing Damage Caused by ESD The following suggestions may help reduce ESD damage that occurs during testing and servicing operations Before connecting any coaxial cable to an analyzer connector for the first time each day momentarily ground the center and outer conductors of the cable Personnel should be grounded with a resistor isolated wrist strap before touch ing the center
36. maintained its polished smoothness the connector can still provide a good low level return loss con nection If you test your cables and accessories for insertion loss and return loss upon receipt and retain the measured data for comparison you will be able to tell in the future if any degradation has occurred Typical values are less than 0 5 dB of loss and sometimes as little as 0 1 dB of loss with high performance con nectors Return loss is a measure of reflection the less reflection the better the larger the return loss the smaller the reflection The best physically contacting connectors have return losses better than 50 dB although 30 to 40 dB is more common WARNING CAUTION General Information Cleaning Connections for Accurate Measurements Visual inspection of fiber ends Visual inspection of fiber ends can be helpful Contamination or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself Use a microscope 100X to 200X magnification to inspect the entire end face for contamination raised metal or dents in the metal as well as any other imperfections Inspect the fiber for cracks and chips Visible imperfec tions not touching the fiber core may not affect performance unless the imperfections keep the fibers from contacting Always remove both ends of fiber optic cables from any instrument system or device before visually inspecting the fiber ends Disable
37. n a system Using the Agilent 11982A with an Agilent 11980A fiber optic interferometer you can measure laser linewidth With a gateable modulation source measure ments of chirp and frequency modulation of single line lasers can also be made Time Domain Measurements with the Agilent 11982A Combining the dc coupled Agilent 11982A with an Agilent 83480 or Infiniium DCA gives you capability for optical eye pattern and impulse response mea surements Use the results to verify optical and opto electronic components and optical system level performance The Agilent 11982A provides dc cou pling with 20 dB electrical gain and 15 GHz bandwidth The Agilent 83480 series and Infiniium DCA have a wide range of bandwidths low jitter and the averaging and persistence features needed for time domain measurements The Agilent 83480 gives you a wide range of time domain characterization capabilities including automated eye diagram measurements auto aligning SONET SDH masks repeatable extinction ratio measurements and Agilent Technologies Eyeline mode for eye analysis Extinction ratio is a critical performance specification for digital optical trans mitters The Agilent 11982A s combination of bandwidth and sensitivity make it extremely useful for eye diagram measurements including extinction ratio However for best extinction ratio accuracy and repeatability the combination of the Agilent Infinitum DCA mainframe with an Agilent 86103A 86105A
38. n and Service Information Performing a Verification Check of the Agilent 11982A If the Agilent 11982A verification check fails If the Agilent 11982A does not pass the verification check you should recheck what was being done when the problem occurred A few minutes spent per forming some simple checks may save waiting for your instrument to be repaired Before calling Agilent Technologies or returning the unit for service please make the following checks Is the rear panel voltage selector switch set correctly Is the line fuse good Does the line socket have power Is the unit plugged in to the proper ac power source Is the unit turned on Check that the green light emitting diode LED next to the line switch is on indicating that the power supply is on If other equipment cables and connectors are being used with the Agilent 11982A are they connected properly and operating correctly Review the procedure for the test being performed when the problem appeared Are all the settings correct Are the connectors clean See Cleaning Connections for Accurate Measurements on page 1 9 for more information about cleaning the connectors If the Agilent 11982A still fails you have two options Return the lightwave converter to Agilent Technologies for repair if the light wave converter is still under warranty or is covered by an Agilent Technologies maintenance contract it will be repaired under the terms of the warranty
39. nance plan Agilent Technologies will notify you of the cost of the repair after examining the unit When an instrument is returned to a Agilent Technologies service office for servicing it must be adequately packaged and have a complete description of the failure symptoms attached When describing the failure please be as spe cific as possible about the nature of the problem Include copies of additional failure information such as the instrument failure settings data related to instrument failure and error messages along with the instrument being returned Preparing the instrument for shipping Write a complete description of the failure and attach it to the instrument Include any specific performance details related to the problem The following 4 4 CAUTION CAUTION Verification and Service Information Returning the Instrument for Service information should be returned with the instrument Type of service required Date instrument was returned for repair Description of the problem Whether problem is constant or intermittent Whether instrument is temperature sensitive Whether instrument is vibration sensitive nstrument settings required to reproduce the problem Performance data Company name and return address Name and phone number of technical contact person Model number of returned instrument Full serial number of returned instrument List of any accessories returned with
40. nd service offices 4 7 tools 4 9 servicing low voltage 4 11 optical input connector 4 12 photodetector and electrical amplifier unit 4 12 troubleshooting 4 11 shipping container 2 2 procedure 4 4 specifications and characteristics 1 5 1 7 ST connector interface 1 4 swabs 1 16 T temperature range 1 7 testing the responsivity 4 2 torque 4 13 troubleshooting servicing 4 11 turning on the lightwave converter 2 9 V VA power requirements 2 4 verification of the Agilent 11982A 4 2 verification test failing 4 3 voltage range 2 4 tumbler 2 5 volts 3 4 Ww warranty 4 3 wavelength range 1 6 Index 2
41. nty This Agilent Technologies instrument product is war ranted against defects in material and workmanship for a period of one year from date of shipment During the war ranty period Agilent Technol ogies will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility desig nated by Agilent Technolo gies Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay ship ping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to Agilent Technologies from another country Agilent Technologies war rants that its software and firmware designated by Agi lent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument Agilent Tech nologies does not warrant that the operation of the instru ment or software or firmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfac ing unauthorized modifica tion or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty is expressed or implied Agilent Te
42. of the Agilent 11982A To verify the dc responsivity and functionality of the Agilent 11982A use the following procedure Remember that the fiber optic connections must be clean Connect a laser with a wavelength of 1300 or 1550 nm approximate to an optical power meter and measure the output power of the laser Connect the RF OUTPUT of the Agilent 11982A lightwave converter to a 50Q load in parallel with a voltmeter for example an Agilent 3456A digital voltmeter Using the dc volts setting measure the output voltage across the 50Q load from the Agilent 11982A without the laser connected to its input This voltage represents the output offset voltage and it should be within the specifications in Table 1 1 on page 1 6 Connect the laser to the OPTICAL INPUT of the Agilent 11982A lightwave converter Using the dc volts setting measure the output voltage across the 50Q load from the Agilent 11982A with the laser connected to its input Subtract the result of Step 3 from Step 5 7 Compute the dc responsivity for the Agilent 119824 by dividing the voltage from Step 6 by the optical power Note If necessary convert the scale of the voltage or watts so that the units are comparable For example divide V bywW not V bya W Compare this to the value provided on the Agilent 11982A Calibration Chart for your unit It should be within the tolerance specified in Table 1 1 on page 1 6 4 2 a fF C NO Verificatio
43. ossible future use You may wish to ship the lightwave converter to another location or to return it to Agilent Technologies for service See Returning the Instrument for Service on page 4 4 2 2 Installation and Preparation for Use Preparing the Agilent 11982A for Use Figure 2 1 Agilent 11982A Packaging Table 2 1 Packaging Materials Item Description Agilent Part Number 1 Outer Carton 9211 6485 2 Foam Pad Set 9220 4805 Table 2 2 Accessories Supplied with the Agilent 11982A but not shown Description Agilent Part Number Comments Adapter SMA f to f 1250 1158 Shipped with the lightwave converter Power cable See Table 2 3 on page 2 4 Shipped with the lightwave converter 2 3 CAUTION CAUTION Installation and Preparation for Use Preparing the Agilent 11982A for Use Connecting the Agilent 11982A to a Power Source The lightwave converter is a portable instrument and requires no physical installation other than connection to a power source Do not connect ac power until you have verified that the line voltage is correct the proper fuse is installed and the line voltage selector switch is properly positioned as described in the following paragraphs Damage to the equipment could result Power Requirements Table 2 3 Agilent 11982A Power Requirements Characteristic Requirement Input Voltage 100 120 220 or 240 V 10 Frequency 47 to 63 Hz Power 75 V maximum
44. racteristics shown in Table 1 1 on page 1 6 The RF cable and RF connector must be replaced carefully to minimize the risk of the Agilent 11982A failing specifications To be sure that it does meet specifications you should return the Agilent 11982A to Agilent Technologies for recalibration Table 4 3 Torque Values Description Tool Size Torque Nut RF OUTPUT SMA 1 2 inch 25 inch pounds connectors SMA cable connections 5 16 inch 10 inch pounds The ac cable assembly consists of the line module the line switch and the cable harness When replacing the ac cable assembly unsolder the connec tions to the dc power supply Remove the line module Remove the line switch See Figure 4 2 on page 4 14 and Table 4 4 on page 4 14 when installing a new ac cable assembly 4 13 Verification and Service Information Service Information Figure 4 2 Wiring Diagram for the Line Module Table 4 4 Line Module to DC Power Supply Connections Cable Attachment Index Number from the Line Module Cable Color 1 ac power harness White brown gray 2 ac power harness Gray 3 dc power supply labeled 5 White 4 dc power supply labeled 4 Yellow 5 dc power supply labeled 3 Orange 6 dc power supply labeled 2 Red 7 dc power supply labeled 1 Blue 8 ac power harness White gray red 9 ac power harness White gray 10 Terminal solder lug bottom of rear panel 4 14 Replacing the Power Supply Veri
45. repaid transportation There is a small handling charge for each order No invoices To provide these advantages a check or money order must accompany each order Mail order forms and specific ordering information are available through your local Agilent Technologies office Within the USA a phone order system is available for regular and hotline replacement parts service A toll free phone number is available and Master card and Visa are accepted The toll free phone number 800 227 8164 is available Monday through Fri day 6 am to 5 pm Pacific time Regular orders have a 4 day delivery time Hotline service is available 24 hours a day 365 days a year for emergency parts ordering The toll free phone number 800 227 8164 is available Mon day through Friday 6 am to 5 pm Pacific time After hours and on holidays call 415 968 2347 To cover the cost of freight and special handing there is an additional hotline charge on each order three line items maximum per order Hotline orders are normally delivered the next business day after they are ordered 4 17 Verification and Service Information Service Information able Parts Figure 4 4 Agilent 11982A Assembly Level Replace 4 18 Table 4 6 Assembly Level Replaceable Parts Verification and Service Information Service Information Vidt Agilent Part Number CD Description 1 5021 5814 5 REAR FRAME 2 08449 00002 5 PANEL REAR 3 11
46. rformance after the initial cleaning seems poor try cleaning the con nector again Often a second cleaning will restore proper performance The second cleaning should be more arduous with a scrubbing action To clean an adapter The fiber optic input and output connectors on many Agilent Technologies instruments employ a universal adapter such as those shown in the following picture These adapters allow you to connect the instrument to different types of fiber optic cables Figure 1 9 Universal adapters Apply isopropyl alcohol to a clean foam swab Cotton swabs can be used as long as no cotton fibers remain after cleaning The foam swabs listed in this section s introduction are small enough to fit into adapters Although foam swabs can leave filmy deposits these deposits are very thin and the risk of other contamination buildup on the inside of adapters greatly out weighs the risk of contamination by foam swabs Clean the adapter with the foam swab 3 Drythe inside of the adapter with a clean dry foam swab 4 Blow through the adapter using filtered dry compressed air Nitrogen gas or compressed dust remover can also be used Do not shake tip or invert compressed air canisters because this releases particles in the can into the air Refer to instructions provided on the compressed air canister 1 18 WARNING General Information Electrostatic Discharge Information Electrostatic Discharge Informat
47. se in different areas Power Cords on page 2 7 lists the available ac power cables illustrates the plug configurations and identifies the geographic area in which each cable is appropriate 2 6 Installation and Preparation for Use Power Cords Power Cords Plug Type t Plug Description pines Color Country 250V 8120 1351 Straight 51363 90 228 Gray United Kingdom 8120 1703 90 90 228 Mint Gray Cyprus Nigeria Zimbabwe Singapore 250V 8120 1369 Straight NZSS198 ASC 79 200 Gray Australia New 5 Zealand 90 8120 0696 87 221 Mint Gray 8120 1689 Straight CEE7 Y11 79 200 Mint Gray East and West _ 8 Furope Saudi 8120 1692 90 79 200 Mint Gray Arabia So Africa 8120 2857p Straight Shielded 79 200 Coco Brown India unpolarized in many nations 8120 1378 Straight NEMA5 15P 90 228 Jade Gray United States 8120 1521 90 90 228 Jade Gray Canada Mexico Philippines 8120 1992 Straight Medical UL544 96 244 Blac Taiwan 8120 2104 Straight SEV1011 79 200 Mint Gray Switzerland 8120 2296 1959 24507 79 200 Mint Gray Type 12 90 8120 2956 Straight DHCK107 79 200 Mint Gray Denmark 8120 2957 90 79 200 Mint Gray Part number shown for plug is the industry identifier for the plug only Number shown for cable is the Agilent Technologies part number for the complete cable including the plug 2 7 Installation and Preparation for Use Power Cords Plug
48. te E1 COM Common ground 0 V dc E1 007 12 V power supply 12 V de approximate Replacement Procedures This section contains the replacement procedures for the following assem blies RF Cable and RF connector AC cable assembly Power supply Note The optical input connector and the amplifier unit must be replaced by Agilent Technolo gies If the optical input connector or the photodetector and electrical amplifier unit fail the Agilent 11982A must be sent to Agilent Technologies for service 4 12 CAUTION Replacing the RF Cable or the RF Connector CAUTION Replacing the ac Cable Assembly Verification and Service Information Service Information This instrument contains static sensitive components Read Electrostatic Discharge Information on page 1 19 before removing any assemblies When replacing the RF cable or RF output connectors use the appropriate torque value See Table 4 3 Avoid bending or distorting any semirigid cables when removing or reinstalling assemblies Before removing an assembly always loosen both ends of any semirigid cable attached to the assembly When reinstalling cables tighten to specified torque only If a torque measuring tool is not available make semirigid cable connections finger tight only Do not overtighten Note Replacing the RF cable or the RF connector may cause the Agilent 11982A to no longer meet the specifications and cha
49. the Agilent 119824 to an oscilloscope perform the following steps If you have not done so already read Chapter 2 Installation and Preparation for Use for instructions about connecting the Agilent 11982A to an ac power supply Connect an SMA or 3 5 mm adapter to the Agilent 11982A RF OUTPUT Note The SMA female to female adapter that is shipped with the Agilent 11982A has been provided as a connector saver Connecting cables to the SMA adapter instead of directly to the Agilent 11982A s RF OUTPUT connector avoids excessive wear of the RF OUTPUT connector Connect the RF OUTPUT of the Agilent 11982A to the selected input channel of the oscilloscope with an SMA or semi rigid coax cable Clean the optical connectors Cleaning Connections for Accurate Measurements on page 1 9 Connect the optical connector interface to the OPTICAL INPUT Notice that the connector interface has a small protrusion This protrusion fits in the slot of the OPTICAL INPUT connector Attach the fiber optic cable to the connector interface 7 Connect the laser source to the fiber optic cable Turn on the equipment The lightwave converter should warm up for 30 minutes before use 3 2 Time Domain Measurements Connecting the Agilent 11982A to an Oscilloscope CAUTION Do not exceed the maximum input to the Agilent 11982A s OPTICAL INPUT The maximum input power is shown on the front panel of the Agilent 11982A NO
50. tion and to maintain the product in a safe condition If this instrument is not used as specified the protection provided by the equipment could be impaired This instrument must be used in a normal condition in which all means for protection are intact only No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers To prevent electrical shock disconnect the Agilent 11982A from mains before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally This is a Safety Class 1 product provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous Intentional interruption is prohibited For continued protection against fire hazard replace line fuse only with same type and ratings type T 0 315A 250V for 100 120V operation and 0 16A 250V for 220 240V operation The use of other fuses or materials is prohibited Verify that the value of the line voltage fuse is correct For 100 120V operation use an IEC 127 5x20 mm 0 315 A 250 V Agilent part number 2110 0449 For 220 240V operation use an IEC 127 5x20 mm 0 16 A 250 V Agilent Technologies part number 2110 0
51. tions 1 9 connectors covering 4 5 foam swabs 1 16 front panel features 2 9 fuse 2 5 values iii fuse holder door 2 5 H hotline orders 4 17 I Publication 61010 1 iii initial inspection 2 2 input connector 1 9 voltage 2 4 instrument returning for service 4 4 L light emitting diode 2 9 lightwave converter 1 2 line frequency 2 4 line voltage range 2 4 selector 2 4 line power cables 2 7 ow voltage servicing 4 11 Index 1 Index M manual updating supplement 4 8 measurement accuracy iv measuring responsivity 4 2 opening the fuse holder door 2 5 OPTICAL OUT connector iv overvoltage servicing 4 11 P packaging 2 2 for shipment 4 5 part ordering information 4 16 PC FC connector interface 1 4 power cable 2 6 power requirements 2 4 power supply adjustment 4 10 service 4 15 R regular orders 4 17 reliability considerations 4 9 repair options 4 3 replaceable parts 4 16 replacement procedures 4 12 replacing the ac cable assembly 4 13 the line module 4 13 the power supply 4 15 responsivity determining 4 2 testing 4 2 returning for service 4 4 RF cable or connector servicing 4 13 S safety iii considerations 4 9 laser classification iii sales and service offices 4 7 serial numbers 1 8 service 4 4 assembly level parts 4 18 information 4 8 options 4 3 power supply replacement 4 15 returning for 4 4 sales a
52. tive to DC Electrical dB 1 10 100 Freq MHz Freq Amp Amp MHz dB GHz dB 4 2 3 4 P 4 4 5 5 o o BuOO DC Responsivity into 50 ohms WM 1300 nm 355 1550 nm 471 O O 0 O0 O1 O1 f P GL GFA Damaging 0 4 O QDO A 0 Q0 6 0 onono nononono noA MAN ROLLON OO GUN gt Figure 3 1 The Agilent 11982A Calibration Chart Table 3 1 The Agilent 11982A Calibration Chart Index Number Description 1 Serial number of the Agilent 11982A 2 Calibration date of the Agilent 11982A 3 Frequency response of the Agilent 11982A in dB 4 The amplitude corrections at specific frequencies 5 Responsivity at 1300 nm and 1550 nm wavelengths 3 5 Performing a Verification Check of the Agilent 11982A 4 2 If the Agilent 11982A verification check fails 4 8 Returning the Instrument for Service 4 4 Preparing the instrument for shipping 4 4 Agilent Technologies Service Offices 4 7 Service Information 4 8 General Information 4 8 Adjustment Procedure 4 10 Troubleshooting 4 11 Replacement Procedures 4 12 Replaceable Parts 4 16 Part Ordering Information 4 16 Verification and Service Information Verification and Service Information Performing a Verification Check of the Agilent 11982A Performing a Verification Check
53. ur nearest Agilent Technologies Service Office 4 8 Safety Considerations WARNING Reliability Considerations Protection from Electrostatic Discharge Required Service Tools Verification and Service Information Service Information Before servicing this lightwave converter familiarize yourself with the safety markings on the instrument and the safety instructions in this manual This instrument has been manufactured and tested according to international safety standards To ensure safe operation of the instrument and the personal safety of the user and service personnel the cautions and warnings in this manual must be heeded Refer to the summary of safety considerations at the front of this manual Indi vidual chapters also contain detailed safety notation Failure to ground the lightwave converter properly can result in personal injury as well as instrument damage Before turning on the lightwave converter connect a three wire power cable with a standard IEC 320 C13 CEE 22 V inlet plug to the lightwave converter power receptacle The power cable outlet plug must be inserted into a power line outlet socket that has a protective earth contact DO NOT defeat the earth grounding protection by using an extension cable power cable or autotransformer without a protective ground conductor If you are using an autotransformer make sure its common terminal is connected to the protective ground conductor of its
54. urrent The photocurrent is amplified by the dc to 22 GHz preamplifier If the photodetector and electrical amplifier unit fails the Agilent 11982A must be returned to Agilent Technologies for service If the 5 V power supply output voltage is low the power supply could be ina current limiting or overvoltage crowbar mode If the power supply is too low use the R12 potentiometer to decrease the voltage then cycle the power of the Agilent 11982A Decreasing the voltage and cycling the power may bring the power supply back to normal operation If the power supply output voltage cannot be brought within tolerance disconnect the power supply from the photodetector and electrical amplifier unit and recheck the 5 V power sup ply If the power supply is still low replace the power supply If the power sup 4 11 Verification and Service Information Service Information ply is operational suspect the photodetector and the electrical amplifier unit The amplifier unit and the optical input connector cannot be replaced if defective the Agilent 11982A must be returned to Agilent Technologies for service The 12 V and 12 V power supplies are not adjusted The voltages on the power supply terminals are described in Table 4 2 Table 4 2 Voltages on the dc Power Supply Terminals Terminal Description Voltage E2 OUT Common ground 0 V dc E2 OUT 5 V power supply 5 7 V dc 50 mV E1 OUT 12 V power supply 12 V dc approxima
55. xpense can be avoided by observing the simple precautions presented in this book This book also contains a brief list of tips for caring for electrical connec tors Choosing the Right Connector A critical but often overlooked factor in making a good lightwave measure ment is the selection of the fiber optic connector The differences in connec tor types are mainly in the mechanical assembly that holds the ferrule in position against another identical ferrule Connectors also vary in the polish curve and concentricity of the core within the cladding Mating one style of cable to another requires an adapter Agilent Technologies offers adapters for most instruments to allow testing with many different cables Figure 1 3 on page 1 10 shows the basic components of a typical connectors The system tolerance for reflection and insertion loss must be known when selecting a connector from the wide variety of currently available connectors Some items to consider when selecting a connector are How much insertion loss can be allowed Will the connector need to make multiple connections Some connectors are better than others and some are very poor for making repeated connections What is the reflection tolerance Can the system take reflection degradation Is an instrument grade connector with a precision core alignment required Is repeatability tolerance for reflection and loss important Do your specifica 1 9 General Information
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