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TOP Series Fiber-Optic Instruments Service Manual Volumes 1, 2, & 3

1. 1 17 Standard 1 17 Optional 1 18 Optical Detector buts UE 2 1 PID CONVGTIOR Sep ES 2 4 Micro PrOGBSSOEL ca EORR eda aane Tae nega dong 2 4 Power Supply 2 4 TOP200 TOP220 Operation 2 4 System Block Diagram ee 2 5 Equipment Required eese eee esses essen essen eesatnna 3 1 dedos IR iouis 3 2 Display CHECK 3 3 Software Revision Check 3 3 Accuracy Verification 3 3 Linearity 3 6 TOP200 220 Optical Power Meters Service Manual Adjustment Process Maintenance Replaceable Parts Index Table of Contents Equipment Required ener Dr pae res 4 1 rjr mee M 4 3 SOIUD auo erii diu d DERE 4 4 Cleaning Procedures eese eee eere eee eene eene nena 5 1 Cleaning the Connector Interface 5 2 Cleaning the SOC 5 3
2. 4 1 Insertion Loss Alignment eeeeeeeeee eene eere enne 4 2 Maintenance Cleaning Procedures 5 1 Cleaning the Connector Interface 5 2 Cleaning the UCI Adapter 5 3 Cleaning the Fiber Optic Connector 5 4 Cleaning the Instrument 5 5 Troubleshooting c cce eee ecce eese eene eene nane 5 6 Performance Problems scssssesscccsssssssrncessseesensnnssens 5 6 ii TOP400 Hand Held Attenuator Service Manual Table of Contents Replaceable Parts Ordering Information 6 1 Instrument Replacement 6 1 Replaceable 5 6 2 Index TOP400 Hand Held Attenuator Service Manual iii Table of Contents iv TOP400 Hand Held Attenuator Service Manual Figure 1 1 Figure 1 2 Figure 2 1 Figure 2 2 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Table 1 1 Table 1 2 Table 1 3 Table 3 1 TOP400 Hand Held Attenuator Service Manual List of Illustrations POP400 Controls sees 1 5 Changing the UCI 1 6 Loss versu
3. Power Output into SMF 28 9um core fiber 7 dBm 0 75 dB 7 dBm 0 75 dB CDRH Class Functions MOD Modulated output mode CW Continuous DC output mode FREQ Frequency selection switch Connector Interface Universal Connector Interface UCI adapters See Accessories and Options section Specifications subject to change without notice 1 Within specified ambient environment of 20 C to 25C In modulated mode power is 3dB lower Return loss to be 30dB Power Requirements Characteristics Table 1 3 Power Requirements Characteristics Power Source TOP130 TOP140 TOP150 TOP160 TOP300 Battery 2 AA Alkaline Batteries 1 5V Typical Battery Life gt 20 Hours gt 80 Hours gt 80 Hours gt 50 Hours gt 20 Hours Power Supply Circuitry Increases 3V battery voltage to 5V 1 22 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Specifications Size and Weight Table 1 4 Size and Weight Feature TOP130 TOP140 TOP150 TOP160 TOP300 Weight 203g 7 202 180g 6 402 180g 6 40z 227g 8 00z 180g 6 40z Instrument Shipping 480g 1702 4309 15 302 4309 15 302 5399 19 002 4309 15 302 Dimension Instrument 72 x 142 x 36mm 2 8 x 5 6 x 1 4 in with rubber bumper Shipping 185 x 240 x 35mm 7 3 x 9 8 x 1 8 in Environmental Specifications Table 1 5 Environmental Specifications Specification TOP130 TOP140 TOP150 TOP160 TOP300 Temperature Operating 15
4. Current A R uw Optical Power W The Optical Power versus current relationship is most linear when the photodetector is operated in the zero bias mode For this purpose a trans impedance amplifier is used out 200 220 Optical Power Meters Service Manual 2 1 Theory of Operation 2 2 The output voltage is Pin pany Riia There are three different semiconductor materials used for optical detectors Their performance varies in terms of sensitivity and wavelength coverage Table 2 1 Photodiode Characteristics Material Useful Wavelength Sensitivity MODEL Range Si Silicon 400nm to 1000nm 1pW to 2mW N A Ge Germanium 600nm to 1550nm 50pW to 5mW N A InGaAs 750nm to 1600nm 1pW to 4mW TOP200 Indium Gallium Arsenide Unfortunately detectors do not respond equally well at different wavelengths Generally at shorter wavelengths the response R is lower than at longer wavelengths Figure 2 1 below shows the response curves of the three materials R esponsivity Amps Watt 1 75 50 25 800 1000 1200 1400 1600 Wavelength nm Figure 2 1 Wavelength Dependency Based on Figure 2 1 above if an InGaAs detector is illuminated with 1mW of optical power then it produces 0 8mA of current The optical detector does not know which wavelength is incident on the surface Consequently the user must the meter what wavelength is measured During calibration the power meter is to
5. Instrument Exchange The TOP400 hand held attenuator is repaired by exchange of the entire instrument for a reconditioned instrument The part number for a reconditioned instrument is listed below Description Tektronix Part Number TOP400 hand held attenuator 118 9641 00 New Instruments New instruments can be purchased like other replacement parts TOP400 Hand Held Attenuator Service Manual 6 1 Replaceable Parts Replaceable Parts Tektronix Part Number Qty Name and Description STANDARD ACCESSORIES 348 1480 00 1 Rubber Bumper with Pivoting Bail 119 4513 00 2 Adapter ST Universal Connector Interface UCI 6 2 TOP400 Hand Held Attenuator Service Manual accessories standard 1 9 UCI adapters 1 10 calibration equipment required 4 1 cleaning cautionary notes 5 1 connector interface 5 2 fiber optic connector 5 4 instrument case 5 5 UCI adapter 5 3 connector interface cleaning 5 2 insertion loss alignment 4 2 operator information connector interface 1 6 optical interface features 1 4 P performance problems 5 6 performance verification 10dB dial setting 3 3 insertion loss 3 2 maximum loss 3 3 required equipment 3 1 return loss 3 3 preface vii product information description 1 3 product information product package 1 3 Index R replaceable parts instrument replacement 6 1 ordering information 6 1 standard 6 2 rubber bumper 1
6. 6 Change the OSA settings as in Table 2 3 then repeat CENTER to PEAK 2 6 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Performance Verification NOTE Steps 7 and 8 set the OSA to measure in RMS mode Center wavelength weighted average wavelength of spectrum Spectral width standard deviation of spectrum multiplied by Kr 2 3548 7 Press SPECTRAL WIDTH then RMS soft key 8 Asmall box should appear in the OSA display showing spectral width parameters Check that the bottom parameter shows Kr RMS 2 3548 If not set Kr RMS to 2 3548 by pressing parameter and making the appropriate entries 9 In the box check 20 center wavelength for the tolerances in Table 2 3 10 Check AA spectral width for the tolerances in Table 2 3 11 Repeat steps 4 to 10 for each wavelength of the TOP product Table 2 3 Wavelength Specifications for TOP130 140 150 160 and 300 Model Specification nm OSA SPAN nm OSA RESOL nm TOP130 850 nm A0 840 to 880 300 5 0 Ak 55 TOP130 1300 nm 1270 to 1345 500 5 01 150 140 1280 to 1340 20 0 2 Ak lt 5 TOP150 1520 to 1580 20 0 2 Ak 5 TOP160 1310 nm 1280 to 1340 20 0 2 An lt 5 TOP160 1550 nm 1520 to 1580 20 0 2 Ak lt 5 TOP300 630 to 640 10 0 2 Ak 2 0 1 If OSA maximum resolution is less than 5 0 nm set OSA to maximum setting TOP 130 140 150 160 300 Fi
7. www tektronix com 1 800 833 9200 select option 1 1 800 833 9200 select option 2 Email techsupport tektronix com 1 800 833 9200 select option 3 1 503 627 2400 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices xvi TOP200 220 Optical Power Meters Service Manual General Information Instrument Level Service Overview This service manual is used for servicing the TOP200 and TOP220 optical power meters to instrument level only The usual corrective procedure is to replace not repair the instrument Static Sensitive Components The TOP200 and 220 optical power meters contain components that are sensitive to electrostatic discharge ESD When servicing the TOP200 and TOP220 optical power meters work only at a static free workstation and practice anti static handling procedures While there is no potential for eye damage due to unaided direct exposure never look directly into the output port Do not use optical viewing instruments such as microscopes magnifiers etc The use of these devices on active fibers can focus a highly intense beam onto the retina Laser Waming which can result in permanent eye damage TOP200 220 Optical Power Meters Service Manual 1 1 General Information Serv
8. 1 800 833 9200 select option 2 Email techsupport tektronix com 1 800 833 9200 select option 3 1 503 627 2400 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices TOP400 Hand Held Attenuator Service Manual General Information Instrument Level Service Overview This service manual is used for servicing the TOP400 hand held attenuator instrument level only The usual corrective procedure is to replace not repair the instrument WARNING While there is no potential for eye damage due to unaided direct exposure always avoid looking directly into the output port Do not use optical viewing instruments such as microscopes magnifiers etc The use of these devices on active fibers can focus a highly intense beam onto the ret na which can result in permanent eye damage TOP400 Hand Held Attenuator Service Manual 1 1 General Information Service Service Procedure The direct service related sections in this manual are Performance Verification Use to verify the TOP400 hand held attenuator to see that the instrument meets specification Adjustment Procedure Use to adjust the TOP400 hand held attenuator m Maintenance Use for e Cleaning Troubleshooting problems a Replaceable Parts Par
9. 119 5172 00 119 5171 00 119 5145 00 119 5145 00 119 5170 00 TOP130 SOC TOP140 150 160 300 UCI Tektronix Part Number 119 4515 00 119 5115 00 119 4514 00 119 4557 00 119 4513 00 119 4546 00 119 4558 00 119 4556 00 119 5116 00 119 4517 00 1 28 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Performance Verification Performance verification verifies that the TOP130 140 150 160 and 300 Fiber Optic Instruments are operating properly and within specification Performance verification is done with the TOP130 140 150 160 and 300 Fiber Optic Instrument covers in place Performance verification should be done before and after any repairs or dis assembly reassembly of the TOP130 140 150 160 and 300 Fiber Optic Instruments Table 2 1 Required Equipment DESCRIPTION Power Meter SPECIFICATION Compatible with power sensors see sensor specifications RECOMMENDED MODEL Advantest Q8221 or HP 8153A Power Sensor short wavelength 0 25 dB from 13 to 4 dBm 615 to 880 nm FC PC Advantest Q82214 or HP 81530A Power Sensor long wavelength 0 25 dB from 20 dBm 6 dBm 1270 to 1580 nm FC PC Advantest Q82208 or HP 81532A Optical Spectrum Analyzer 600 to 1600 nm range Uncertainties for measurement of laser source Ac 20 5 nm width 0 2 nm LED with 55 nm spectral width 21 0 nm width 41 2 nm
10. Cleaning the Fiber Optic Connector 5 4 Cleaning Battery 5 5 Cleaning the Instrument 5 6 peelrthe dnm 5 7 No Power once oso crore ea ro sos lo e DN E RU 5 7 Error Messages et 5 7 Performance Problems 5 7 Ordering Information ccsscsssssssssecssssesscssssccesssrsesesseeees 6 1 Instrument Replacement 6 1 Replaceable Parts asa 6 2 TOP200 220 Optical Power Meters Service Manual iii Table of Contents iv TOP200 220 Optical Power Meters Service Manual List of Illustrations Figure 1 1 Optical Interface and SOC 1 4 Figure 1 2 Instrument Button and Switch 1 7 Figure 1 3 Changing the SOC 1 9 Figure 1 4 Battery 1 11 Figure 2 1 Wavelength Dependency 2 2 Figure 2 2 Detector and SOC Adapter Alignment 2 3 Figure 2 3 System Overview 2 5 Figure 3 1 Performance Verificatio
11. Open battery compartment and remove batteries c Remove calibration tamper seal d Set CAL switch to CAL position e Reinstall batteries and battery compartment cover f Turn power on C should appear on the bottom left hand corner of the display Calibration Switch 2 Attach FC adapters to the reference power sensors attenuators lasers and device under test DUT NOTE You may adjust the absolute power accuracy at one or more wavelengths Use steps 3 to 11 for 850 or 980 nm and steps 12 to 21 for the other wavelengths After adjustment exit the CAL mode as directed in step 22 3 Use the 850 nm laser and short wavelength power sensor for the TOP 200 Use the 980 nm laser and long wavelength power sensor for the TOP 220 4 2 TOP200 220 Optical Power Meters Service Manual Adjustment Process NOTE Due to DUT wavelength dependence at 850 and 980 nm laser source wavelength must be within 1 nm of nominal 10 1 12 13 14 15 Use the multimode attenuator and multimode fibers for steps 5 to 11 Turn on all equipment and allow a 15 minute warm up With the reference power sensor covered zero the reference power meter Use the fibers to connect the laser to the attenuator input and the attenuator output to the reference power sensor Set the reference power meter wavelength to the nominal laser wavelength Adjust the attenuator for a reading on the reference power meter of 30 00 dBm TOP2
12. Performance Verification Display Check 1 Step 1 Press and hold the 2 button and press the ON OFF button to power on the power meter The display should show all the display segments as shown in Figure 3 20 850 980 1300 1310 1550 B uw C a a mW Figure 3 2 Display Segments 1 Step2 If some display segments are missing turn power off and repeat Step 1 If failure repeats see Troubleshooting section for possible solutions Software Revision Check Step 1 Press and hold on the ON OFF button The display should show the revision number of the software O Step 2 If revision number does not display turn power off and repeat Step 1 If failure repeats see Troubleshooting section for possible solutions Accuracy Verification 1 Attach FC adapters to the reference power sensors attenuators lasers and device under test DUT 2 Use the 850 nm laser and short wavelength power sensor for the TOP200 Use the 980 nm laser and long wavelength power sensor for the TOP220 NOTE Due to DUT wavelength dependence at 850 and 980 nm laser source wavelength must be within 1 nm of nominal 3 Use the multimode attenuator and multimode fibers for steps 4 to 11 TOP200 220 Optical Power Meters Service Manual 3 3 Performance Verification 3 4 10 11 Turn on all equipment and allow a 15 minute warm up With the reference power sensor covered zero the reference power meter Use the fibers
13. cccccccccsesesensccsscscunccnsesacscsescesssseseess 1 3 Product Package 1 3 Product Description 1 3 TOP130 Optical Dual LED Source 1 3 TOP140 TOP150 TOP160 Optical Laser Sources 1 4 TOP300 Visual Fault Finder 1 4 Operating Modes scccccscccsnccncessceseeeesesssccceennsanersnseens 1 5 CW MOG iii 1 5 MOD MOG RE 1 5 Other Features Qro vaina dea Rb E Ra 1 6 Optical Interface 1 6 Rubber Bumper 1 6 Structural Integrity eere 1 6 O m 1 6 Operator Information sssecesssseersscessssnsnsneeesssenseseeneess 1 7 TOP130 Dual LED 1 8 Labeled Switches and LEDs 1 9 TOP140 and TOP150 Laser Sources 1 10 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual i Table of Contents Performance Verification Labeled Switches and LEDS 1 11 TOP160 Laser Source 1 12 Labeled Sw
14. towel Step 4 Replace rubber bumper Figure 3 5 Cleaning the Instrument Case TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Troubleshooting No Power On If the TOP 130 140 150 160 and 300 Fiber Optic Instruments will not power on properly the most likely cause is a discharged battery battery installed improperly or a defect on the meter Typical indications of a discharged battery are w No power when turned ON m Blinking LED indicator on front panel You may continue to operate the unit until the front panel LED shuts off However the optical output may not be stable while the battery discharges past this LOW BATTERY point Performance Problems Problem Possible Solutions Front panel LED s not working Check for discharged battery If failure repeats replace instrument Modulation frequency out of spec Replace instrument Mean Wavelength or Spectral Width out of spec Replace instrument Loss of output power Clean connector interface If power continues to drop check for discharged battery If failure repeats laser is dying Replace instrument Switch Button functions not responding Replace instrument Dust Cap disconnected or loose on lasers Replace Instrument TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 3 7 Maintenance Troubleshooting 3 8 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Replaceable Parts This section conta
15. 3 Adjust the laser for maximum output but not more than 5 dBm 4 Adjust the attenuator for 10 00 dBm on the reference power meter Make a copy of the Linearity Worksheet Table 3 1 and record the attenuator setting with 0 01 dB resolution 5 Adjust the attenuator for each of the reference meter levels listed in the worksheet and record the attenuator settings For the TOP220 leave out the 30 to 50 dBm tests NOTE This procedure doesn t verify linearity over the full TOP220 operating range If it is desired to test over the full range it is necessary to obtain a laser attenuator and reference power sensor that can operate at 100mW average power level 6 Move the fiber from the reference sensor to the DUT Set the DUT wavelength to 1310 nm 7 Setthe attenuator to the setting on the worksheet corresponding to 10 00 dBm At the DUT press and hold the dB dBm button until the DUT reads 0 00 0 01 dB TOP200 220 Optical Power Meters Service Manual Performance Verification 8 Set the attenuator to the other values in the worksheet and check that the DUT displays within the listed limits NOTE If the results are out of tolerance repeat the procedure Attenuator repeatability laser output level drift and bad fiber connections can cause errors Table 3 2 Linearity Worksheet Ref Power Meter Attenuator Setting Reading dBm dB DUT Reading dB Low Limit dB High Limit dB 10 00 0 00
16. 4 S safety laser radiation v symbols v terminology v service information adjustment 4 1 cleaning 5 1 overview 1 1 performance verification 3 1 theory of operation 2 1 troubleshooting 5 6 SOC adapters cleaning 5 3 optional 1 10 specifications performance 1 7 T theory of operation princle 2 1 wavelength dependency 2 2 TOP series performance specifications 1 7 troubleshooting performance problems 5 6 U UCI adapters cleaning 5 3 optional 1 10 7 1 TOP400 Hand Held Attenuator Service Manual
17. C to 455 C 15 C to 455 C 15 C 55 C 15 C to 55 C 15 to 45 Humidity Operating 0 95 RH Non condensing Non Operating storage 0 95 RH Non condensing TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 23 General Information Specifications 1 24 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual EMC Compliance Table1 6 Certifications and compliances Category Standards or description EC Declaration of Conformity Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was EMC demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 61326 EMC requirements for Class A electrical equipment for measurement control and laboratory use IEC 61000 4 2 Electrostatic discharge immunity Performance criterion B IEC 61000 4 3 RF electromagnetic field immunity Performance criterion A Australia New Zealand Complies with EMC provision of Radiocommunications Act per the following standard s of Conformity AS NZS 2064 1 2 Industrial Scientific and Medical Equipment 1992 FCC Compliance Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits 1 Emissions which exceed the levels required by this standard may occur when this equipment is connected to a test object TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 25 Gener
18. Connector Interface Selected Laser Plus Battery Condition Indicator Blinking Low Battery Modulation Mode Indicator ON OFF button Select button for CW or MODulation Mode Laser Select Button Modulation Frequency Switch Figure 1 3 TOP160 Dual Laser Source Button Switch and LED locations 1 12 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Operator Information Labeled Switches and LEDs amp amp t The ON OFF button turns the TOP160 ON or OFF The A button controls OFF ONT which laser is on The MOD button selects CW continuous mode and MOD modulation mode The CW mode provides continuous and stable output used for loss measurements The MOD is useful for special equipment that require modulated optical output The 1310nm indicator lights when the 1310nm laser is selected If the O 1310nm laser is selected and a Low Battery condition exists the 1310nm 1310 1550 MOD indicator blinks The 1550nm indicator lights when the 1550nm laser is selected If the 1550nm laser is selected and a Low Battery condition exists the 1550nm indicator blinks The MOD indicator lights when the modulating mode is selected 2001028 The Frequency Select switch inside the battery compartment determines the current frequency modulation under MOD modulating mode The output power is a square wave signal of either 270Hz 1kHz or 2kHz The Connector Interface ut
19. Level Verification Adjustment 2 2 Setup Figure 2 1 illustrates how the TOP instrument the reference cable and the power meter are properly connected to perform the source level verification and adjustment Reference Cable Power Meter TOP Instrument Battery Compartment Variable Power Supply Adjustment Screw Figure 2 1 Setup for Source Level Verification Adjustment TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Performance Verification TOP 140 150 160 and 300 Laser Source Instruments NOTE Perform steps 1 and 2 only if adjustment is needed Otherwise battery power may be used A 5 minute warm up is adequate for all tests 1 Remove the battery cover and batteries to gain access to the adjustment s 2 Setthe variable power supply to 3 V and connect to the battery terminals 3 Connect the TOP instrument output to the optical power sensor using single mode fiber See Table 2 to select the optical sensor and power meter wavelength setting 4 Switch the TOP instrument to ON and CW and verify that the output power is within the limits in Table 2 For the TOP160 check both wavelength lasers The adjustment s are in the battery compartment 5 Laser safety checks Check that the LED indicator lights for the selected wavelength when power is on Check that the dust cap is attached and that it fits snugly CAUTION After calibration verification or adjustment the output
20. OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety ix Safety Summairy c ccc cc decreed xiii 2 XV If You Need Help e eeeeeee n enun an enetne etas Ass mbpltiOns XV Before SErvVich ng tice scsecsisicpsccscnsiescaserssscdcncassssiutersedonctesavsone XV What You Will Find in this Manual XV Related xvi Tektronix Service ccce eee e ecce cesse eese enano nonas xvi General Information Instrument Level ServiCe ccce eese eee eae een se nu ones e reraas 1 1 Le a4 A ERE EUIS I IL M 1 1 Static Sensitive 1 1 Service Procedure eec eese e eene sae e nene neca acere eaa 1 2 Product Information
21. POSSIBILITY OF SUCH DAMAGES Table of Contents Table of Contents Safety Summary vii Power 0 5 Laser Radiationicac cccicccccccceiccicscscnsscssccstcctecesesenssdsessssnseus Do Not Remove Covers or vii Qualified Personnel Only viii Preface inris cedro saos eren esci NE ix If You Need Help near sacs Sun eph pora sve ix Assumptions ci eee Before Servicing What You Will Find this Manual X Related Documents x Tektronix Service eee X General Information Instrument Level ServicCe eec 1 1 OVOrVI W eese ees actore sao nae rc 1 1 Service 1 2 Product Information 1 3 Product Package 1 3 Product Description 1 3 Features vecors creo 1 4 Optical Interface 1 4 Rubber B
22. TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Product Information This section briefly describes the TOP 130 140 150 160 300 Fiber Optic Instruments A quick review of this section will familiarize you with the TOP 130 140 150 160 300 Fiber Optic Instruments which may help when servicing the instrument For complete product information refer to the TOP 130 140 150 160 200 300 Fiber Optic Instruments User Manual Product Package The TOP 130 140 150 160 300 Fiber Optic Instruments are supplied with the following equipment and standard accessories w One Rubber Bumper with bail Two AA alkaline 1 5V batteries One User Manual 070 9372 01 One Calibration Certificate Product Description The Tektronix TOP 130 140 150 160 300 Fiber Optic Instruments are true palm sized rugged and versatile instruments designed for use in the installation maintenance and testing of fiber optic systems TOP130 Optical Dual LED Source The Tektronix TOP130 Dual Wavelength 850 1300nm Optical LED Source is used for installing and testing attenuation of both singlemode and multimode fiber optic links including telephony datacom CATV FDDI and LAN applications The palm sized TOP130 provides the flexibility in a single unit to interface to all industry standard fiber optic connectors with high throughput repeatability and stability This optical interface of this instrument features the precisio
23. cover while pulling on its sides Step 3 Remove used batteries and discard Replace with new batteries Step 4 Replace battery cover O Step 5 Replace rubber bumper NOTE Observe the correct polarization as indicated in the bottom of the battery compartment Failure to install the batteries in the correct orientation may damage the instrument Please discard batteries according to local environmental regulations PUSH PULL N W Figure 1 4 Battery Replacement TOP200 220 Optical Power Meters Service Manual 1 11 General Information Battery Information 1 12 TOP200 220 Optical Power Meters Service Manual General Specifications Performance Characteristics Table 1 1 Performance Characteristics Feature TOP200 TOP220 Detector Material InGaAs 1mm InGaAs 2mm Power Range 3 to 60dBm 27dBm to 30dBm 1310 and 1550nm 30dBm to 27dBm 980nm only CAL Wavelengths 850nm 1300nm 1310nm 1550nm 980nm 1310nm 1550nm Absolute Accuracy 0 25dB at Calibration Conditions Stability Longterm 24 hours 0 01dB Temp 15 C to 50 C 0 05dB Drop With Rubber Bumper 4 feet all 6 faces plus 4 corners In Carrying Case 900A 10 feet all 6 faces plus 4 corners Function dBm Absolute power dB Relative Power X Select CAL wavelength also used to set default CAL wavelength CAL Calibrate unit Calibration Data Data stored in non volatile memory Auto Shutoff Unit powers d
24. covers or panels removed Wear Eye Protection Wear eye protection if exposure to high intensity rays or laser radiation exists Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Do Not Operate in Wet Damp Conditions TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual ix General Safety Summary Symbols and Terms A A Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry Provide Proper Ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation Terms in this Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Safety Summary WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product Aa uU CAUTION Double Protec
25. maximizes repeatability 0 2dB typical The UCI is complemented by a broad line of simple screw on screw off adapters TOP300 Visual Fault Finder The Tektronix TOP300 is specifically designed for field personne who need an efficient and economical tool to visually inspect continuity and integrity of fiber installations during and after installation The highly efficient laser diode operates at short wavelengths which makes the emitted light even more visible to the human eye The TOP300 employs a military grade hermetically sealed laser diode with proprietary and extremely stable fiber coupling scheme Hermetically sealed laser diodes are important for reliability and longevity TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Production Information Operating Modes The TOP 130 140 150 160 and 300 Fiber Optic Instruments feature two front panel selectable operating modes CW continuous mode and MOD modulated mode CW Mode In the CW mode the LED is continuously powered with no frequency modulation It features stabilized and calibrated output power to speed up transmission loss measurements MOD Mode Many Fiber Identifiers Optical Power Meters Lock in Meters or other special equipment require that the optical level is modulated There are three established frequencies 270Hz 1kHz and 2kHz which are used worldwide A switch within the battery compartment allows you t
26. power meter wavelength to the actual not nominal laser wavelength Adjust the attenuator for a reading on the reference power meter of 30 00 dBm TOP200 or 10 00 dBm TOP220 Disconnect the fiber from the reference power meter and connect it to the DUT Set the DUT wavelength to 1310 nm by pressing the 7 button Press the DUT dB dBm button to indicate in dBm and check for a reading between 30 25 and 29 75 dBm TOP200 or 10 25 to 9 75 dBm TOP220 For TOP200 products with serial numbers BO2xxxx and up set the DUT wavelength to 1300 nm by pressing the A button and repeat step 19 Repeat steps 14 to 19 using the 1550 nm laser with the reference power meter wave length set to the actual laser wavelength and the DUT wavelength set to 1550 nm 200 220 Optical Power Meters Service Manual 3 5 Performance Verification Linearity Verification 3 6 NOTE There is no published specification for linearity However the DUT should pass the following procedure If the DUT fails the procedure it should be returned to Tektronix for evaluation and repair or replacement if needed since there are no linearity adjustments 1 Atthe reference power meter select the long wavelength sensor Set the wavelength to 1310 nm With the sensor covered set the zero 2 Attach the 1310 nm laser to the single mode attenuator input and the attenuator output to the long wavelength reference power sensor using single mode fibers
27. remove the adapter the dust cap fits over all adapters TOP400 Hand Held Attenuator Service Manual Operator Information This section summarizes the basic operating procedures of the TOP400 hand held attenuator as well as changing the universal connector interface UCI adapters A quick review of this section will familiarize you with the basic operation of the TOP400 hand held attenuator which may help when servicing the instrument For complete operator information refer to the TOP400 Hand Held Attenuator User Manual AE Dust Cap LH a Output Input SS Sees Gr o f Dial Knob 400 arewaton Pointer Tektronix VA Figure 1 1 TOP400 Controls TOP400 Hand Held Attenuator Service Manual 1 5 General Information Operator Information Connector Interface Your TOP400 attenuator is equipped with a UCI adapter to accommodate all popular industry standard fiber optic connectors To change UCI adapters for the TOP400 hand held attenuator O Step 1 Firmly press the adapter over the interface ferrule until it reaches the stop Step 2 Rotate the adapter body until the anti rotation pin engages O Step 3 Firmly tighten the knurled adapter shell Step 4 To remove simply unscrew the adapter Figure 1 2 Changing the UCI Adapter 1 6 TOP400 Hand Held Attenuator Service Manual General Specifications Performance Characte
28. the connector ferrule with the connector interface Additional adapters may be ordered by Tektronix part number Table 1 3 UCI Adapter Selection Chart 400 Connector Types Tektronix Part Number 30 Biconic 119 4515 00 31 119 5115 00 FC APC 32 D4 PC 119 4514 00 33 SMA 905 906 119 4557 00 5 119 4513 00 35 DIN PC 119 4546 00 DIN APC HRL 10 Emri 222 36 DIAMOND 3 5 119 4558 00 37 DIAMOND 2 5 119 4556 00 HMS 10 HP 38 SC PC 119 5116 00 SC APC TES 39 SMA 2 5 119 4517 00 N A E2000 PC 119 5164 00 1 10 TOP400 Hand Held Attenuator Service Manual Theory of Operation This section describes the theory of operation for the TOP400 hand held attenuator to provide a basic overview of how the instrument operates Principle of Operation The attenuation principle relies on the fact that singlemode fibers may be separated to create a defined loss In the TOP400 attenuator the distance of two precision ground ferrules is accurately controlled Typically the attenuation versus ferrule separation is highly non linear A precision cam is used internally to linearize this curve The ferrules are ground at an angle to deflect the light from being guided back to the input EM a 10 LOSS dB DISTANCE mm Figure 2 1 Loss versus Fiber Distance TOP400 Hand Held Attenuator Service Manual 2 1 of Operation Wavelength
29. 00 or 10 00 dBm TOP220 Disconnect the fiber from the reference power meter and connect it to the DUT Set the DUT wavelength to the nominal laser wavelength 850 or 980 nm by pressing the button Press the DUT dB dBm button to make the adjustment Check for a reading between 30 02 and 29 98 dBm TOP200 or 10 02 and 9 98 dBm TOP220 For the remaining steps use the single mode attenuator single mode fibers and long wavelength power sensor Zero the reference power meter with the power sensor covered Use the fibers to connect the 1310 nm laser to the attenuator input and the attenuator output to the reference power sensor Set the reference power meter wavelength to the actual not nominal laser wavelength TOP200 220 Optical Power Meters Service Manual 4 3 Adjustment Process 16 17 18 19 20 21 22 Adjust the attenuator for a reading on the reference power meter of 30 00 dBm TOP200 or 10 00 dBm TOP220 Disconnect the fiber from the reference power meter and connect it to the DUT Set the DUT wavelength to 1310 nm by pressing the X button Press the DUT dB dBm button to make the adjustment Check for a reading between 30 02 and 29 98 dBm TOP200 or 10 02 and 9 98 dBm TOP220 For TOP 200 products with serial numbers BO2xxxx and up set the DUT wavelength to 1300 nm by pressing the 4 button and repeat step 19 Repeat steps 14 through 19 using the 1550 nm laser with
30. 1 7 other features 1 5 performance specifications 1 13 power specifications 1 13 product package 1 3 size and weight specifications 1 14 troubleshooting error messages 5 7 no power on 5 7 performance problems 5 7 TOP200 220 Optical Power Meters Service Manual Service Manual Tektronix TOP Series TOP130 TOP140 TOP150 TOP160 TOP300 Fiber Optic Instruments Volume 2 070 9379 03 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix Inc rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc Box 500 Beaverton OR 97077 TEKTRONIX and are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In ord
31. 2 5 125 um Tektronix part number OA5012 or 5022 Attenuator single mode 0 01 dB resolution 0 05 dB repeatability Tektronix part number OA5002 Fiber multimode 62 5 125 2 each 5 FC PC connectors with metallic end faces on connector ferrules Rifocs 2626 106 05 Fiber single mode 9 125 um SMF 28 2 each 5 m FC PC connectors with metallic end faces on connector ferrules Rifocs 2626 101 05 NOTES 1 AII meters sensors and lasers must have FC adapters Used only for TOP200 Used only for TOP220 TOP200 220 Optical Power Meters Service Manual Performance Verification Setup Light Source To prevent measurement errors clean detector interface on the optical power meter and all other fiber connectors and adapters before use Do not look directly into the output port of the laser source Do not use optical viewing instruments such as microscopes magnifiers etc to view active fibers The use of these devices on active fibers can focus a highly intense beam on to the retina which can result in permanent eye damage Figure 3 1 illustrates how the stable light source SLS attenuator reference power meter and power meter under calibration are connected for performance verification ATTENUATOR REFERENCE OPTICA POWER METER OPTICAL POWER METER UNDER CALIBRATION Figure 3 1 Performance Verification Setup TOP200 220 Optical Power Meters Service Manual
32. 50 160 and 300 Fiber Optic Instruments work only at a static free workstation and practice anti static handling procedures WARNING While there is no potential for eye damage due to unaided direct exposure never look directly into the output port Do not use optical viewing instruments such as microscopes magnifiers etc The use of these devices on active fibers can focus a highly intense beam onto the retina which can result in permanent eye damage TOP140 150 and 160 TOP300 ER DO NOT STARE INTO BEAM Laser Aperature 1mW max at 630 670 nm CLASS II LASER PRODUCT CLASSI LASER PRODUCT TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 1 General Information Service Service Procedure The direct service related sections in this manual are m Performance Verification and Adjustment Use to verify the TOP130 140 150 160 and 300 Fiber Optic Instru ments to see that they meet specification before and after repairs and adjustments have been made and to make adjustments Maintenance Use for e Cleaning Resolving error messages displayed on the screen e Troubleshooting problems m Replaceable Parts Part numbers and ordering information The first section in this manual General Information contains product information user information battery power information specifications accessories and options If you have no need for this information go directly to the other sections
33. AL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary uides d SUE alee SONT d ix Safety Summaly 5 fort RU ERR RR ERA xiii uo eee eee If You Need cisciscecasesuendscnstecatesassneciacstceasansncscesyccanas ASSUIMDUONS mete C Before Servicing cor Ey ea IUe ea EAE XV What You Will Find in this xvi Related Documents ce eeee esee eere ee cessere xvi Tektronix ServiCe 211 xvi General Information Instrument Level Service Lecce ccce 1 1 919412 CEP Pm 1 1 Static Sensitive 1 1 Service Procedure essseneoressorsoseossssnesnennseonosesussseenrense 1 2 Product Information ccsccccssssssccsssseccccesnnsssssssssesssonsasecccses 1 3 1 3 Product Description scssssseseessesenncssceussenseesenssenenss 1 3 Operating 5 1 4 Optical Interface cccsscsssscsevescesseessenc
34. B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up 1 10 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual OFF CW MOD 270 1k 2k General Information Operator Information Labeled Switches and LEDs The OFF CW MOD slide switch controls the power and the two operating modes CW continuous mode and MOD modulating mode The CW mode provides continuous and stable output used for loss measurements The MOD is useful for special equipment that require modulated optical output The Power and Low Battery Indicator lights when the power is ON and blinks when the battery is low The Frequency Select switch inside the battery compartment determines the current frequency modulation under MOD modulating mode The output power is a square wave signal of either 270Hz 1kHz or 2kHz The Connector Interface utilizes a Universal Connector Interface UCI adapter It allows you to quickly adapt to all popular industry standard fiber optic connectors These pictures and descriptions are for products with serial numbers at B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 11 General information Operator Information TOP160 Laser Source Beam Cap
35. Dependency Although the attenuation of the TOP400 is virtually independent of the wavelength it varies slightly at operating wavelengths other than 1800nm The curve below indicates the amount of deviation you can expect when operating at wavelengths from 1000nm to 1600nm 0 AE EISE e 2 i 4 E BENI 104 i i i4 IM MM i 1000 1060 1120 1180 1240 1300 1360 1420 1480 1540 1500 WAVELENGTH nm RELATIVE LOSS dB d 5i ES i T i L Figure 2 2 Wavelength Dependency 2 2 TOP400 Hand Held Attenuator Service Manual Performance Verification Performance verification verifies that the TOP400 hand held attenuator is operating properly and within specification Performance verification is done with the TOP400 hand held attenuator covers in place Tektronix recommends the performance of the TOP400 hand held attenuator be verified on annual basis Required Equipment Equipment Specification Example Comments Optical Power 0 25dB accuracy RIFOCS 575L Equivalent optical power meter may be Meter 75dBm to 3dBm range used Return Loss Test OdBm to 65dBm RIFOCS 585RL Equivalent return loss test set may be Set 1300nm used Reference Cable FC PC RIFOCS 5920 Used on Retum Loss Test Set SOC Adapter FC PC 119 5146 00 Used on Optical Power Meter UCI Adapter 3 FC PC 119 4516 00 Used on the laser source and TOP400 Reference Ca
36. Fabry Perot Fabry Perot Center Wavelength 850nm 1300nm 1310nm 1550nm 635nm Wavelength Range 840 880nm 1270 1345nm 1280 1340nm 1520 1580nm 630 640nm Spectral Width 55 RMS 150nm RMS lt 5 RMS lt 5nm RMS lt 2 nm RMS mE Stability 1 hour max deviation 0 05dB 0 05dB 0 03dB 0 03dB 0 15dB 10 hour max deviation N A N A 0 15dB 0 15dB 0 25dB Power Output into SMF 28 9um core fiber N A 38 dBm nominal 7 dBm 0 5 dB 7 dBm 0 5 dB 4 5 dBm nominal into 62 5 125 GI MM fiber 13 dBm nominal 20 dBm nominal N A N A N A CDRH N A Class Class Class 11 Functions MOD Modulated output mode CW Continuous DC output mode FREQ Frequency selection switch Connector Interface Snap On Connector SOC adapter Universal Connector Interface UCI adapters See Accessories and Options See Accessories and Options section section Specifications subject to change without notice Within specified ambient environment of 20 C to 25 In modulated mode power is 3dB lower TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 21 General Information Specifications Table 1 2 Performance Characteristics TOP160 Characteristic TOP160 Source Type Fabry Perot Fabry Perot Center Wavelength 1310nm 1550nm Wavelength Range 1280 1340nm 1520 1580nm Spectral Width 5nm RMS lt 5nm RMS Stability 1 hour max deviation 0 05dB 0 05dB 10 hour max deviation 0 2 dB 0 2 dB ee 5
37. LED with 150 nm spectral width 23 0 nm width 43 5 nm Advantest Q8381A or Advantest Q8384 DC Power Supply 3 V 500 mA Tektronix CPS250 FC PC Adapter SOC adapter for TOP130 Tektronix 119 5146 00 FC PC Adapter UCI adapter for TOP140 150 160 300 Tektronix 119 5115 00 Fiber multimode 5 m FC PC connectors with metallic end Rifocs 2626 106 05 62 5 125 um faces on connector ferrules Fiber single mode SMF 28 9 125 um 5 m FC PC connectors with metallic end faces on connector ferrules Rifocs 2626 101 05 1 OSA center wavelength and spectral width uncertainties for LED sources include both the OSA wave length and amplitude uncertainties for the rated LED spectral width A TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual CAUTION To prevent measurement errors clean connector interface on the TOP series instruments and all other fiber connectors and adapters before use Performance Verification Avoid looking directly into the output port of the laser source Avoid using optical viewing instruments such as microscopes magnifiers etc to view active fibers The use of these devices on active fibers can focus a highly intense beam on to the retina which can result in permanent eye damage TOP140 TOP150 and TOP160 TOP300 LASER LIGHT LASER LIGHT DO NOT STARE INTO BEAM 00 NOT STARE INTO BEAM TmW max at 630 670 nm CLASSI LASER PRODUCT CLASS I LASER PRODUCT Source
38. Laser Source Button Switch and LED locations eerie ertet eese euer 1 12 Figure 1 4 TOP300 Visual Fault Finder Switch and LED Locations 1 14 Figure 1 5 Frequency Modulation Switch 1 15 Figure 1 6 Interchanging the UCI 1 16 Figure 1 7 Interchanging the SOC Adapter esses 1 17 Figure 1 8 Battery 1 19 Figure 1 9 Rubber Bumper with Pivoting 1 25 Figure 2 1 Setup for Source Level Verification Adjustment 2 2 Figure 3 1 Cleaning the Connector 3 2 Figure 3 2 Cleaning the SOC or UCI Adapter 3 3 Figure 3 3 Cleaning the Fiber Connector eee 3 4 Figure 3 4 Cleaning the Battery 3 5 Figure 3 5 Cleaning the Instrument 3 6 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual List of illustrations vi TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual List of Tables Table 1 1 Performance Characteristics eese 1 21 Table 1 2 Performance Characteristics 160 1 21 Table 1 3 Power Requirements Characte
39. OP400 Hand Held Attenuator Volume 3 070 9379 03 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix Inc rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc Box 500 Beaverton OR 97077 TEKTRONIX and are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for th
40. Performance Verification Table 3 1 Sample Test Specification Test Specification Indicator at 10dB Indicator at Maximum Return Loss Indicator at Maximum 10dB Dial Setting Verification O Step 1 Retain the setup as described in Step of the Insertion Loss Verification L Step 2 With the TOP400 set to OdB press the dB button on the optical power meter This establishes the baseline reading Step 3 Set the dial indicator to exactly 10dB on the attenuator Step 4 Read the loss increase in dB on the optical power meter Check for 10dB 2dB Maximum Loss Verification O Step 1 Retain the setup as described Step in the Insertion Loss Verification section Step 2 Adjust the TOP400 knob to the maximum Step 3 Read the relative dB loss on the optical power meter display and check for 35dB or greater MI i This test is optional It should be performed if one Return Loss Verification of the other checks is out of tolerance or excessively noisy L Step 1 Reference the return loss test set as described in its user manual Step 2 Connect the TOP400 using the 5920 reference cable Step 3 Set the TOP400 to maximum loss The return loss must be higher than 40dB TOP400 Hand Held Attenuator Service Manual 3 3 Performance Verification 3 4 TOP400 Hand Held Attenuator Service Manual Required Equipment Equipment Adjustment Process This section describes the adjustment process for the TOP400 hand he
41. Service Manual Tektronix TOP Series Fiber Optic Instruments TOP200 TOP220 Optical Power Meters Volume 1 070 9379 03 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix Inc rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc Box 500 Beaverton OR 97077 TEKTRONIX and are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service cente
42. al Information Specifications 1 26 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Accessories and Options Standard Accessories Standard accessories are included with the instrument or may be ordered by TEKTRONIX part number Table 1 7 Standard Accessories Accessory TEKTRONIX Part Number User Manual 070 9372 01 Service Manual 070 9379 02 Rubber Bumper w Bail 348 1480 00 Two 2 AA Alkaline 1 5 batteries N A Rubber Bumper Bail Figure 1 9 Rubber Bumper with Pivoting Bail TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 27 General Information Accessories and Options Optional Accessories Option No 30 31 33 35 36 37 38 39 Biconic FC PC FC APC D4 PC SMA 905 906 ST PC DIN PC DIN APC HRL 10 DIAMOND 3 5 DIAMOND 2 5 HMS 10 HP SC PC SC APC SMA 2 5 Connector Types This service manual is an optional accessory and can be ordered by Tektronix part number 070 9379 03 SOC and UCI adapters are interchangeable to accommodate a number of connector adapters A SOC or UCI adapter is used to align the connector ferrule with the connector interface Additional SOC and UCI adapters may be ordered by Tektronix part number Table 1 8 SOC UCI Adapter Selection Chart Adapters Tektronix Part Number 119 5168 00 119 5146 00 119 5146 00 119 5167 00 119 5169 00 119 5144 00 o 119 5166 00 119 5166 00
43. als 3 Connect the output of the TOP130 to the short wavelength power sensor using the 62 5 125um fiber cable 4 Set the TOP130 to ON 850 and CW mode Set the power meter to 850 nm 5 Check that the output power is 13 dBm typically 15 to 11 dBm The adjustment is in the battery compartment 6 Connect the output of the TOP130 to the long wavelength power sensor using the 62 5 125 um fiber cable 7 Set the TOP130 to 1300 Set the power meter to 1300 nm 8 Check that output power is 20 dBm typically 22 to 18 dBm The adjustment is in the battery compartment 2 4 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Performance Verification Verifying Modulation of the TOP130 140 150 and 160 NOTE The MOD mode has only nominal not warranted specifications This section is a functional check MOD frequency can be set using a switch in the battery compartment Normally test MOD mode only at one frequency don t change the switch setting 1 Connect the output of the TOP product see the Source Level Verification section 2 Set TOP product to and CW mode Set the power meter wavelength to the nominal TOP output wavelength 3 Set the power meter to relative dB mode and set the dB reference to 0 dB 4 Set the TOP to MOD Check for about 3 dB typically 3 5 to 2 5 dB 5 For multiple wavelength units repeat steps 1 to 4 for each wavelength NOTE Optionally the MOD waveform can
44. anual Tektronix provides service to cover repair under warranty and post warranty problems The TOP 130 140 150 160 and 300 Fiber Optic Instruments are warranted for one year The warranty statement appears at the beginning of this manual Contacting Tektronix Phone Address Web site Sales support Service support Technical support 1 800 833 9200 Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA www tektronix com 1 800 833 9200 select option 1 1 800 833 9200 select option 2 Email techsupport tektronix com 1 800 833 9200 select option 3 1 503 627 2400 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices xvi TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Instrument Level Service Overview This service manual is used for servicing the TOP 130 140 150 160 and 300 Fiber Optic Instruments to instrument level only The usual corrective procedure is to replace not repair the instrument Static Sensitive Components The TOP 130 140 150 160 and 300 Fiber Optic Instruments contain components that are sensitive to electrostatic discharge ESD When servicing the TOP 130 140 1
45. ature range display offers 0 01dB resolution dB dBm and wavelength annunciators indicate current operating mode All features rival functions otherwise only found in top of the line laboratory instruments Optical Interface Features Easily cleanable detector window and connector adapter Refer to Cleaning and Troubleshooting section for cleaning procedures SOC adapters are field changeable and must match the type of fiber connector being used Refer to Accessories and Options section for connector adapter options Rubber Bumper Every instrument includes a removable rubber bumper This molded silicone shell acts to protect against shock in the field The rubber bumper includes a pivoting bail to hold the instrument upright when required Structural Integrity The TOP200 and TOP220 instruments can take falls and are highly crush resistant The unit provides reliable and accurate measurements from 15 C to 50 Dust The permanently attached dust cap simply snaps into place There is no need to remove the adapter the dust cap fits over all adapters TOP200 220 Optical Power Meters Service Manual 1 5 General Information Product Information 1 6 TOP200 220 Optical Power Meters Service Manual Operator Information This section summarizes the TOP200 and TOP220 optical power meter button functions as well as changing the Snap on Connector SOC adapters A quick review of this section familiari
46. be viewed using an O E converter such as a Tektronix P6701B or P6703B with an oscilloscope A square wave should be displayed with frequency of 270 Hz 1 kHz or 2 kHz depending on TOP switch setting 5 typical The duty cycle should be about 50 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 2 5 Performance Verification Verifying Wavelength of the TOP130 140 150 160 and 300 NOTE A significant change in wavelength due to aging is unlikely Facilities not having wavelength measurement equipment can leave out this section with mini mal risk However since there are no amplitude accuracy specifications for the TOP130 and TOP300 these products can only be given traceable calibrations if wavelength specifications are tested 1 Connect the output of the TOP product using a single mode fiber multimode for TOP130 to the input of the Optical Spectrum Analyzer OSA 2 Setthe TOP to ON CW 3 Turn on the OSA Allow a 5 minute warm up NOTE The OSA instructions are written for an Advantest Q8381A Consult the OSA operating manual for use of other OSA products 4 Set the OSA as follows CENTER set to the nominal TOP wavelength SPAN 300 nm except 500 nm for TOP130 at 1300 setting REF LEVEL AUTO LEVEL SCALE LIN AVG 1 OFF SWEEP MODE ADAPTIVE RESOLUTION 5 0 nm or maximum available setting if lt 5 0 MEASURE REPEAT 5 After at least one complete sweep set the OSA CENTER to PEAK
47. ber Optic Instruments Service Manual 2 7 Performance Verification Verifying the Low Battery Indicator NOTE Perform this procedure only if a low battery indicator malfunction is suspected 1 Remove the battery cover and batteries 2 Connect the variable power supply to the battery clips 3 Turn unit ON and set voltage to 3V on the power supply 4 Slowly lower the voltage while observing the front panel LED indicator 5 The LED indicator must start blinking at 2 5V 0 1V The laser power must remain stable at 2 5V For the TOP130 the LED indicator starts blinking at 2 2 0 1V TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Maintenance Cleaning Procedures This section discusses cleaning procedures for the connector interface SOC UCI adapters fiber optic connectors battery contacts and instrument case It is absolutely critical to maintain the cleanliness off all connector interfaces adapters fiber optic connectors each and every time they are used to guarantee maximum performance by the TOP 130 140 150 160 and 300 Fiber Optic Instruments Improper maintenance practices causes the following performance degradation m Measurement errors Poor analog transmission quality critical to CATV and microwave on fiber applications Digital bit error rates increase Coupled light power is reduced w Receiver input power outside optimum operating range m Dirty connectors may cause damage t
48. ble SMF 28 RIFOCS 2626 101 05 Bulkhead Adapter N A RIFOCS MPC 10 To prevent measurement errors clean connector interface on the TOP400 attenuator and all other fiber connectors and adapters before use AN Laser Warning Do not look directly into the output port of the return loss test set Do not use optical viewing instruments such as microscopes magnifiers eic to view active fibers The use of these devices on active fibers can focus a highly intense beam on to the retina which can result in permanent eye damage TOP400 Hand Held Attenuator Service Manual Performance Verification Insertion Loss Verification Step 1 Connect the return loss test set to the optical power meter as shown below A 1310 nm single mode laser source may be used in place of the Return Loss Test Set Return Loss Test Set Optical Power Meter Reference Cable Reference Cable 2626 101 05 5920 Bulkhead Adapter Step 2 Establish the zero reference by pressing the dB button on the optical power meter Step 3 Connect the TOP400 in place of the bulkhead adapter and set it to OdB Return Loss Test Set Optical Power Meter mre m ase NES Reference Cable 2626 101 05 Reference Cable 5920 mm TOP400 Attenuator Set to OdB Step 4 Read the relative dB loss on the optical power meter display and check that it is 2 0 dB or less 3 2 TOP400 Hand Held Attenuator Service Manual
49. cement 4 1 ordering information 4 1 rubber bumper 1 6 S safety laser radiation xi symbols xi terminology x service information cleaning 3 1 overview 1 1 performance verification 2 1 troubleshooting 3 7 SOC adapters cleaning 3 3 interchanging 1 16 optional 1 26 specification environmental 1 21 specifications TOP 130 140 150 300 Fiber Optic Instruments Service Manual Index performance 1 21 power 1 22 size and weight 1 23 T TOP series description 1 3 environmental specifications 1 23 performance specifications 1 21 power specifications 1 22 product package 1 3 size and weight specifications 1 23 TOP130 Dual LED Description 1 3 operator information 1 7 Source level verification 2 3 switches and LEDs 1 8 TOP140 Laser Source Description 1 4 operator information 1 9 source level verification 2 2 Switches and LEDs 1 10 TOP150 Laser Source Description 1 4 operator information 1 9 source level verification 2 2 switches and LEDs 1 10 TOP160 Laser Source Description 1 4 operator information 1 13 Source level verification 2 2 Switches and LEDs 1 12 TOP300 Visual Fault Finder Description 1 4 operator information 1 14 Source level verification 2 2 Switches and LEDs 1 14 troubleshooting no power on 3 7 performance problems 3 7 U UCI adapters cleaning 3 3 interchanging 1 15 Service Manual Tektronix TOP Series Fiber Optic Instruments T
50. d fiber optic connectors and must always be cleaned before each and every use To clean UCI adapters Step 1 Using a clean lintless swab insert the swab into the thru hole of the adapter O Step 2 Clean exterior and interior surfaces using a lint free cloth wetted with reagent grade isopropyl alcohol Step 3 Wipe exterior and interior surfaces again with a fresh dry lint free cloth to remove any residual alcohol Insert swab end completely then remove and dispense after each use 22 CLETOP Stick type cleaner Figure 5 2 Cleaning the UCI adapter TOP400 Hand Held Attenuator Service Manual 5 3 Maintenance Cleaning Cleaning the Fiber Optic Connector Step 1 Dampen a lint free swab or paper wipe with electronics grade alcohol and gently wipe across and around the connector a couple of times Step 2 Dry with a dry swab or dry portion of the paper wipe Step 3 If the connector is extremely dirty repeat the procedure with a second lint free swab or paper wipe p Lint free swab Fiber connector or paper wipe Figure 5 3 Cleaning the Fiber Connector 5 4 TOP400 Hand Held Attenuator Service Manual Maintenance Cleaning Cleaning the Instrument Case To clean instrument case O Step 1 Remove protective rubber bumper Step 2 Wipe exterior surface of instrument case with clean paper towel wetted with a small amount of isopropyl alcohol NOTE Avoid using an excessive amount of alco
51. damage to equipment m You must be a qualified service person m Read the Safety Summary at the beginning of this manual m Heed to all warnings cautions and notes in this manual What You Will Find in this Manual m General Information General product and operator information Battery replacement Specifications Accessories and options m Theory of Operation Basic information on how the TOP200 and TOP220 optical power meters operate m Performance Verification Procedures for verifying that the TOP200 and TOP220 optical power meters function properly and meet warranted operating specifications TOP200 220 Optical Power Meters Service Manual Related Documents Tektronix Service Contacting Tektronix Phone Address Web site Sales support Service support Technical support Adjustment Process Adjustment for the TOP200 and TOP220 optical power meters Maintenance Cleaning procedures General troubleshooting and fault isolation Replaceable Parts Part numbers and ordering information The TOP Series Fiber Optic Instruments User Manual Tektronix provides service to cover repair under warranty and post warranty problems The TOP200 and TOP220 optical power meters are warranted for one year The warranty statement appears at the beginning of this manual 1 800 833 9200 Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA
52. dentifiers Optical Power Meters Lock in Meters or other special equipment require that the optical level is modulated There are three established frequencies which are used worldwide 270Hz 1kHz and 2kHz A Switch located inside the battery compartment allows you to select the appropriate modulation frequency for the TOP130 Dual LED Source and the TOP140 TOP150 and TOP160 Laser Sources The instruments are shipped with the switch set to 1kHz To change the modulation frequency setting Step 1 Turn power off Step 2 Remove the battery cover and the two AA batteries Step 3 Set the switch to the desired position see Figure 1 4 Step 4 Replace the batteries and the battery cover a Step 5 Turn power on and set the OFF CW MOD switch to MOD position The output will now be square wave modulated NOTE The average power ouiput will be 3dB less than the average power in CW mode Figure 1 5 Frequency Modulation Switch NOTE These pictures and descriptions are for products with serial numbers at B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 15 General Information Operator Information Connector Interface Your TOP instruments are equipped with either a SOC or UCI adapter to accommodate all popular industry standard fiber optic connectors T
53. e return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE
54. ecifications are out of tolerance go to the Calibration Process section for proper calibration procedures Performance verification is done with the optical power meter covers in place Table 3 1 Equipment Required DESCRIPTION Power Meter SPECIFICATION Compatible with power sensors see sensor specifications RECOMMENDED MODEL HP 8153A or Advantest Q8221 Power Sensor short wavelength 0 10 dB at 30 dBm 850 nm HP 81530A or Advantest Q82214 with special absolute power calibration Power Sensor long wavelength 30 10 dB at 10 dBm and 30 dBm for 980 1310 and 1550 nm wavelengths linearity 30 025 dB 5 to 50 dBm HP 81532A or Advantest Q82208 with special absolute power calibration Laser 850 nm 550 uW CW into 62 5 125 um fiber Center wavelength 849 to 851 nm Stability 0 05 dB Rifocs 267A 106 APC10 or Rifocs 667R 106 APC10 selected for 850 1 nm Laser 980 nm 5500 uW CW into 62 5 125 um fiber Center wavelength 979 to 981 nm Stability 0 05 dB Special order Laser 1310 nm 5800 uW CW into 9 125 um fiber Center wavelength 1290 to 1330 nm Stability 0 01 dB Advantest Q8221 Q81211 Laser 1550 nm 5500 uW CW into 9 125 um fiber Center wavelength 1290 to 1330 nm Stability 0 01 dB Advantest Q8221 Q81212 FC PC Adapter SOC adapter for TOP200 220 Tektronix part number 119 5146 00 Attenuator multimode 0 01 dB resolution 50 125 or 6
55. el only It does not contain component level service information schematics or parts lists If You Need Help Information about servicing the TOP130 140 150 160 and 300 Fiber Optic instruments is available by calling the Tektronix number listed in Contacting Tektronix on page xvi and selecting the desired option Assumptions The procedures in this manual assume that you are a qualified electronic technician and have a working knowledge of service procedures for fiber optic test equipment Before Servicing To prevent injury to yourself or damage to equipment m You must be a qualified service technician m Read the Safety Summary at the beginning of this manual m Heed to all warnings cautions and notes in this manual What You Will Find in this Manual m General Information General product and operator information Battery replacement Specifications Accessories and options Performance Verification and Adjustment Procedures for verifying that the TOP 130 140 150 160 and 300 Fiber Optic Instruments function properly and meet warranted operating specifications and for adjustment TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual xv Related Documents Tektronix Service Maintenance Cleaning procedures General troubleshooting and fault isolation Replaceable Parts Part numbers and ordering information The TOP 130 140 150 160 200 300 Fiber Optic Instruments User M
56. enuator Service Manual 4 1 Adjustment Process Insertion Loss Alignment O Step 1 Reference the optical power meter as shown in Figure 4 1 Set the power meter to dB relative mode and set the OdB reference TOP160 Dual Laser Source TOP200 Power Meter Figure 4 1 Initial Power Meter Referencing Step 2 Turn the knob of the TOP400 until the pointer is set at Step 3 Remove the rubber bumper and the case cover located at the lower rear part of the instrument O Step 4 Connect the attenuator to the light source and optical power meter as shown in Figure 4 2 4 2 TOP400 Hand Held Attenuator Service Manual Adjustment Process TOP400 Attenuator TOP200 Power Meter TOP160 Laser Source Figure 4 2 Setup for Insertion Loss Alignment max lt 1 75dB After the adjustment set the power meter to OdB reference Step 5 Gently rotate the ferrule nut to achieve the lowest dB losses O Step 6 Turn the knob to align the pointer with 10 TOP400 Attenuator TOP200 Power Meter TOP160 Laser Source Figure 4 3 10dB Point Verification 4 3 TOP400 Hand Held Attenuator Service Manual Adjustment Process L Step 7 Adjust the set screw until the reading on the optical power meter reads 10 00dB 0 2dB Do not tighten the set screw near the ferrule Doing so may cause the TOP400 to operate erratically SET SCREW CAUTION DO NOT ADJUST OR TIGHTEN SET SCREW CASE COVER Figure 4 4 Locat
57. er 1300 The 1300nm Indicator Low Battery Indicator is on when the 1300nm LED is active It is also used as an indicator for low battery power The OFF CW MOD slide switch controls the power and the two operating OFF CW MOD modes CW continuous mode and MOD modulating mode The CW mode provides continuous and stable output used for loss measurements The MOD is useful for special equipment that require modulated optical 270 1k 2k The Frequency Select switch inside the battery compartment determines the current frequency modulation under MOD modulating mode The output power is a square wave signal of either 270Hz 1kHz or 2kHz The Connector Interface utilizes a Snap on Connector SOC adapter It allows you to quickly adapt to all popular industry standard fiber optic connectors NOTE These pictures and descriptions are for products with serial numbers at B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 9 General Information Operator Information TOP140 and TOP150 Laser Sources Connector Interface OFF CW MOD Select Switch Power and Low Battery Indicator Modulation Frequency Switch Figure 1 2 TOP140 and TOP150 Laser Sources Switch and LED locations NOTE These pictures and descriptions are for products with serial numbers at
58. er to obtain service under warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY
59. esee 1 17 SOC Adapter Selection Chart 1 18 Photodiode Characteristics eene 2 2 Equipment 3 1 Linearity Worksheet esee 3 7 TOP200 220 Optical Power Meters Service Manual vii List of Tables viii TOP200 220 Optical Power Meters Service Manual General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Replace Batteries Properly Replace batteries only with the proper type and rating specified Recharge Batteries Properly Recharge batteries for the recommended charge cycle only Use Proper AC Adapter Use only the AC adapter specified for this product Do Not Operate Without Covers Do not operate this product with covers or panels removed Wear Eye Protection Wear eye protection if exposure to high intensity rays or laser radiation exists Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified serv
60. ew reference power level Pher depress the dB dBm button for about 2 3 seconds until the r annunciator appears below the dB annunciator The instrument displays 0 00 dB referenced to the current dBm input level Note that the optical power meter reading may move several counts up and down around zero if the instrument detects minor fluctuations in the input signal TOP200 220 Optical Power Meters Service Manual General Information Operator Information The 4 button selects the wavelength calibration factor being used by the optical power meter The calibration wavelengths that are available for the TOP200 optical power meter are 850nm 1300nm 1310nm and 1550nm The TOP220 calibration wavelengths are 980 1310nm and 1550nm To select a start up default wavelength you simply select the desired wavelength by pressing and holding the button then pressing the dB dBm button When the power is turned off and on again the optical power meter defaults to this wavelength This switch inside the battery compartment determines the current operating mode of the TOP200 and TOP220 optical power meters Setting OP CAL the switch to OP sets the power meter to normal operation mode while setting the switch to CAL sets the power meter to calibration mode A is displayed on lower left hand corner of the LCD display when the power meter is in calibration mode Connector Interface The connector interface supports many SOC adapter
61. g Modulation of the TOP 130 140 150 160 and 300 2 5 Verifying Wavelength of the TOP 130 140 150 160 and 300 2 6 Verifying the Low Battery Indicator 2 8 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Table of Contents Maintenance Cleaning Procedures cere eee ee eres eee esee se nennen 3 1 Cleaning the Connector Interface 3 2 Cleaning the SOC or UCI Adapter 3 3 Cleaning the Fiber Optic Connector 3 4 Cleaning Battery 3 5 Cleaning the Instrument 3 6 Troublesho oting eren eroe peur cerner 3 7 No Power 3 7 Performance Problems 3 7 Replaceable Parts Ordering Information 4 1 Instrument Replacement eene 4 1 Index TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual lii Table of Contents iv TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual List of Illustrations Figure 1 1 TOP130 Dual LED Source Switch and LED Locations 1 8 Figure 1 2 TOP140 and TOP150 Laser Sources Switch and 5 1 10 Figure 1 3 TOP160 Dual
62. harge immunity Performance criterion B IEC 61000 4 3 RF electromagnetic field immunity Performance criterion A Australia New Zealand Declaration of Conformity EMC Complies with EMC provision of Radiocommunications Act per the following standard s AS NZS 2064 1 2 Industrial Scientific and Medical Equipment 1992 FCC Compliance Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits 1 Emissions which exceed the levels required by this standard may occur when this equipment is connected to a test object TOP200 220 Optical Power Meters Service Manual 1 15 General Information Specifications 1 16 TOP200 220 Optical Power Meters Service Manual Accessories and Options Standard Accessories Standard accessories are included with the instrument or may be ordered by part number Table 1 7 Standard Accessories Accessory TEKTRONIX Part Number User Manual 070 9372 01 Rubber Bumper w Bail 348 1480 00 Two 2 AA Alkaline 1 5 batteries 2100 hours life N A SOC Adapter specified at time of order N A 200 220 Optical Power Meters Service Manual 1 17 General Information Accessories and Options Optional Accessories This service manual is an optional accessory and can be ordered by Tektronix part number 070 9379 03 SOC adapters are interchangeable to accommodate a number of connector adapters A SOC adapter is used to align the co
63. he General Safety Summary before performing any service procedures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components avoid electric shock do not touch exposed connections TOP200 220 Optical Power Meters Service Manual Xiii General Information Safety Summary xiv TOP200 220 Optical Power Meters Service Manual Preface This manual is used for servicing the TOP200 and TOP220 optical power meters to instrument level only 1t does not contain component level service information schematics or parts lists If You Need Help Information about servicing the TOP200 and TOP220 optical power meters is available by calling the Tektronix number listed in Contacting Tektronix on page xvi and selecting the desired option Assumptions The procedures in this manual assume that you are a qualified electronic technician and have a working knowledge of service procedures for fiber optic test equipment Before Servicing To prevent injury to yourself or
64. hen making measurements on optical systems avoid eye exposure to any open ended fibers optical connectors optical interfaces or other sources because they may be connected to laser transmitters m not look into the optical port when a source is turned on m Keep the dust cap on the optical port when in use Avoid looking at the free end of a test fiber the end not connected to the instrument If possible direct the free end toward a non reflective surface Do Not Remove Covers or Panels Do not remove the instrument covers or panels nor operate without covers and panels in place TOP400 Hand Held Attenuator Service Manual vii Safety Summary Qualified Personnel Only This service manual is designed for use by qualified personnel only To avoid damage to the instruments do not perform any servicing unless you are a qualified technician viii TOP400 Hand Held Attenuator Service Manual Preface This manual is used for servicing the TOP400 hand held attenuator to instrument level only It does not contain component level service information schematics or parts lists If You Need Help Information about servicing the TOP 400 hand held attenuator is available by calling the Tektronix number listed in Contacting Tektronix on page viii and selecting the desired option Assumptions The procedures in this manual assume that you are a qualified electronic technician and have a working knowledge of service pr
65. hol It can damage the labels at the rear of the instrument Step 3 Wipe exterior surface of instrument case again with dry paper towel O Step 4 Replace rubber bumper Figure 5 4 Cleaning the Instrument Case TOP400 Hand Held Attenuator Service Manual 5 5 Troubleshooting Performance Problems Problem Possible Solutions High insertion loss Clean connectors see pages 5 1 to 5 4 High insertion loss Operating wavelength is not 1310nm or 1550nm Can not adjust power Bad optical connection defective instrument Knob pointer functions not responding Replace instrument Dust cap disconnected or loose Replace 5 6 TOP400 Hand Held Attenuator Service Manual Replaceable Parts This section contains a list of replaceable parts for the TOP400 hand held attenuator Use this list to identify and order replacement parts Ordering Information Replacement parts are available from your local Tektronix service center When ordering a replacement part include the following information m Part number wm Instrument model number m Instrument serial number instrument modification number if applicable if a part you order has been replaced with new or improved part your local Tektronix service center or representative will contact you regarding any change in the part number Instrument Replacement The TOP400 hand held attenuator is serviced by replacing the instrument These are two options you should consider
66. ical Interface 1 4 The TOP200 and TOP220 optical power meters feature two operating modes Normal Operation OP and Calibration CAL At power on the optical power meter defaults to the operating mode and wavelength last selected as the default at power off To change to the calibration mode set the switch found inside the battery compartment to CAL mode A in the lower left hand corner of the LCD display indicates that the power meter is in calibration mode See the Calibration Process section for calibration procedures The optical interface located above the power meter detects the specified wavelength from the light source Using an InGaAs detector repeatability is achieved due to the exact center alignment of the SOC adapter The wavelength options are 850nm 1300nm 1310nm and 1550nm for the TOP200 and 980nm 1310nm and 1550nm for the TOP220 The dust cap protects the optical interface when not in use Refer to the Accessories and Options section for a list of the most common connectors and SOC adapter options The optical interface must always be covered with the dust cap to protect the detector window from dirt or scratches T Housing Ferrule Stop Light Baffle N Detector Active Surface Figure 1 1 Optical Interface and SOC Adapter 200 220 Optical Power Meters Service Manual Other Features General Information Product Information LCD Display The extended temper
67. ice 1 2 Service Procedure The direct service related sections in this manual are m Theory of Operation Reference information about the instruments m Performance Verification Use to verify the TOP200 and TOP220 optical power meters to see that the instruments meet specification m Adjustment Process Use to adjust the TOP200 and TOP220 optical power meters if specifications are out of tolerance m Maintenance Use for e Cleaning e Resolving error messages displayed on the screen e Troubleshooting problems m Replaceable Parts Part numbers and ordering information The first section in this manual General Information contains product information user information battery power information specifications accessories and options If you have no need for this information go directly to the other sections a TOP200 220 Optical Power Meters Service Manual Product Information This section briefly describes the TOP200 and TOP220 optical power meters A quick review of this section will familiarizes you with the TOP200 and TOP220 optical power meters which will help when servicing the instrument For complete product information refer to the TOP Series Fiber Optic Instruments User Manual Product Package The TOP200 and TOP220 optical power meters are supplied with the following equipment and standard accessories One snap on connector SOC adapter specified at time of order Refer to Accessories and Opt
68. ice personnel Do Not Operate in Wet Damp Conditions TOP200 220 Optical Power Meters Service Manual ix General Information General Safety Summary Symbols and Terms A A Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry Provide Proper Ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation Terms in this Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product TOP200 220 Optical Power Meters Service Manual Symbols on the Product The following symbols may appear on the product a CAUTION Double Protective Ground Refer to Manual Insulated Earth Terminal Laser Aperature TOP200 220 Optical Power Meters Service Manual xi General Information General Safety Summary Safety Summary Only qualified personnel should perform service procedures Read this Service Safety Summary and t
69. ilizes a Universal Connector Interface UCI adapter It allows you to quickly adapt to all popular industry standard fiber optic connectors TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 13 General Information Operator Information Visual Fault Finder Connector Interface OFF CW MOD Select Switch Power and Low Battery Indicator i ML 8 Figure 1 4 TOP300 Visual Fault Finder Switch and LED Locations Labeled Switches and LEDs OFF CW MOD The OFF CW MOD slide switch controls the power and the two operating e modes CW continuous mode and MOD modulating mode The CW mode provides continuous and stable output used for loss measurements The MOD is useful for special equipment that require modulated optical output The Power and Low Battery Indicator lights when the power is ON and blinks when the battery is low The Connector Interface utilizes a Universal Connector Interface UCI adapter It allows you to quickly adapt to all popular industry standard fiber optic connectors NOTE These pictures and descriptions are for products with serial numbers at B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up 1 14 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Operator Information Changing the Modulation Frequency Many Fiber I
70. ins a list of replaceable parts for the TOP 130 140 150 160 300 Fiber Optic Instruments Use this list to identify and order replacement parts Ordering Information Replacement parts are available from your local Tektronix service center When ordering a replacement part include the following information m Part Number Instrument model number m Instrument serial number m instrument modification number if applicable If a part you order has been replaced with a new or improved part your local Tektronix service center or representative will contact you regarding any change in the part number Instrument Replacement The TOP 130 140 150 160 and 300 Fiber Optic Instruments are serviced by replacing the instrument These are two options you should consider Instrument Exchange The TOP Series instruments are repaired by exchange of the entire instrument for a reconditioned instrument The part numbers for these reconditioned instruments are listed below Description Part No Serial No Part No Serial No TOP130 Dual LED Source 118 9276 00 B010100 B019999 118 9678 00 BO2XXXX TOP140 Laser Source 118 9277 00 B010100 B019999 118 9679 00 BO2XXXX TOP150 Laser Source 118 9278 00 B010100 B019999 118 9680 00 BO2XXXX TOP160 Dual Laser Source 118 9394 00 B010100 B019999 118 9681 00 BO2XXXX TOP300 Visual Fault Finder 118 9279 00 B010100 B019999 118 9486 00 BO2XXXX New Instruments New instruments can be purchased like
71. into the thru hole of the adapter 1 Step 2 Clean exterior and interior surfaces using a lintfree cloth wetted with reagent grade isopropyl alcohol 1 Step 3 Wipe exterior and interior surfaces again with a fresh dry lintfree cloth to remove any residual alcohol Insert swab end completely then remove and dispense after each use Figure 3 2 Cleaning the SOC UCI adapter TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 3 3 Maintenance Cleaning Cleaning the Fiber Optic Connector Step 1 Dampen a lint free swab or paper wipe with electronics grade alcohol and gently wipe across and around the connector a couple of times Step 2 Dry with a dry swab or dry portion of the paper wipe Step 3 If the connector is extremely dirty repeat the procedure with a second lint free swab or paper wipe Lint free swab or paper wipe Figure 3 3 Cleaning the Fiber Connector 3 4 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Maintenance Cleaning Cleaning Battery Contacts In some occasions it becomes necessary to clean battery contacts due to leaky batteries or water contamination If battery contacts are no longer susceptible to cleaning the corrective procedure is to replace them Batteries that are leaking electrolyte are hazardous Avoid contact with electrolyte which may damage eyes skin and clothing Please discard batteries in accordance with local environ
72. ion of Set Screw Step 8 Turn the knob of the TOP400 until the pointer is at 0 again Readjust the set screw only if necessary to obtain the 0 dB loss obtained in Step 5 within 0 1dB NOTE Turning the set screw as little as possible maintains a close relationship of 10 on the pointer with 10 00 on the optical power meter You may have to repeat Steps 5 6 and 7 until the insertion loss and the 10dB value match Step 9 Turn the knob until the pointer reaches the maximum max should be 235dB Slowly bring down the pointer until it stops at O The dB loss must be the same as Step 5 with a tolerance of 0 2dB 1 Step 10 Turn the knob to align pointer to O Adjust set screw if necessary O Step 11 Repeat Steps 9 and 10 to check for repeatability O Step 12 Disconnect the TOP400 from the light source and optical power meter Replace the case cover and rubber cover 4 4 TOP400 Hand Held Attenuator Service Manual Maintenance Cleaning Procedures This section discusses cleaning procedures for the connector interface UCI adapters fiber optic connectors and instrument case It is absolutely critical to maintain the cleanliness of all connector interfaces adapters fiber optic connectors each and every time they are used to guarantee maximum performance by the 400 hand held attenuator Improper maintenance practices causes the following performance degradation m Measurement errors Poor a
73. ions for a list of SOC adapter options m One rubber bumper with bail a Two AA alkaline 1 5V batteries 2100 hours life m One user manual 070 9372 01 Product Description The Tektronix TOP200 and TOP220 true palm sized optical power meters cover the full range of optical fiber applications These instruments were engineered for field and lab personnel requiring a high performance cost effective compact and rugged OPM The TOP200 and TOP220 optical power meters utilize the snap on connector SOC interface All industry standard fiber optic connectors can be accommodated via a complete line of snap on connector adapters The TOP200 and TOP220 design combines a state of the art signal processor and microcomputer electronics to provide superb performance as well as simple and elegant operation with just three controls ON OFF dBm dB and 4 Photonic energy is directly analyzed through digital signal processing The result is a very fast readout settling time The instrument settles within less than two seconds upon applying OdBm power level Quick readout stabilization becomes very important when performing repetitive measurements or splice alignment The TOP220 has an optical filter in front of the photodetector to attenuate high power levels This filter extends the range of the optical input power to 27dBm TOP200 220 Optical Power Meters Service Manual 1 3 General Information Product Information Operating Modes Opt
74. is section contains a list of replaceable parts in the TOP200 and TOP220 optical power meters Use this list to identify and order replacement parts Ordering Information Replacement parts are available from your local Tektronix service center When ordering a replacement part include the following information m Part number Instrument model number m Instrument serial number a Instrument modification number if applicable If a part you order has been replaced with a new or improved part your local Tektronix service center or representative will contact you regarding any change in the part number Instrument Replacement The TOP200 and TOP220 optical power meters are serviced by replacing the instrument These are two options you should consider Instrument Exchange The TOP series instruments are repaired by exchange of the entire instrument for a reconditioned instrument The part number for reconditioned TOP200 and TOP220 optical power meters are listed below Description Part No Serial No Part No Serial No TOP200 optical power meter 118 9281 00 B010100 B019999 118 9682 00 BO2XXXX TOP220 optical power meter 118 9640 00 New Instruments New instruments can be purchased like other replacement parts TOP 200 amp 220 Fiber Optic Instruments Service Manual 6 1 Replaceable Parts Replaceable Parts Tektronix Part Number Qty Name and Description STANDARD ACCESSORIES 348 1480 00 1 Rubber Bumper wi
75. itches and LEDs 1 13 TOP300 Visual Fault Finder 1 14 Labeled Switches and LEDS 1 14 Changing the Modulation Frequency 1 15 Connector Interface M MH E 1 16 Battery 1 19 Power Supply 1 19 Battery Replacement 1 19 General Specifications sssssccsssssssssccssssenseesssessssessee 1 21 Performance Characteristics 1 21 Power Requirements Characteristics 1 22 Size and 1 23 Environmental Specifications 1 23 EMC Gominpliance 5 o coo ec n rne ii 1 25 Accessories and 1 27 Standard 1 27 Optional 1 28 Required Equipment M 2 1 Source Level Verification Adjustment 2 2 2 2 140 150 160 and 300 Laser Source Instruments Mec 2 3 Verifyin
76. l Step 3 Wipe exterior and interior surfaces again with a fresh dry lint free cloth to remove any residual alcohol insert swab end completely then remove and dispense after each use Figure 5 2 Cleaning the SOC adapter TOP200 220 Optical Power Meters Service Manual 5 3 Maintenance Cleaning Cleaning the Fiber Optic Connector Step 1 Dampen a lint free swab or paper wipe with electronics grade alcohol and gently wipe across and around the connector a couple of times Lj Step 2 Dry with a dry swab or dry portion of the paper wipe Step 3 If the connector is extremely dirty repeat the procedure with a second lint free swab or paper wipe Lint free swab Fiber connector or paper wipe Figure 5 3 Cleaning the Fiber Connector 5 4 TOP200 220 Optical Power Meters Service Manual Maintenance Cleaning Cleaning Battery Contacts Occasionally it is necessary to clean battery contacts due to leaky batteries or water contamination If battery contacts can no longer be cleaned replace them Batteries that are leaking electrolyte are hazardous Avoid contact with electrolyte which may damage eyes skin and clothing Discard batteries in accordance with local environmental regulations To clean battery contacts a Step 1 Remove battery compartment cover and the two AA batteries Avoid contact with leaking electrolyte Step 2 Remove each battery contact from its respective slo
77. ld attenuator All calibration procedures are in accordance with MIL STD 45662A The following procedures should be performed by qualified personnel only Before service and repair is attempted you must perform a performance verification test as described in the Performance Verification section Doing so will help indicate the nature of the problem Specification Example Comments Light Source Optical Power Meter Fiber Cable 2 SOC adapter 1 adapter 3 Bulkhead Adapter Phillips Screw Driver Needle Nose Pliers Tweezers 1300nm 30nm TOP160 Stable narrow band laser source gt 10dBm power 0 03 stability 0 25dB accuracy TOP200 NIST traceable Equivalent optical power 60dBm to 3dBm meter may be used InGaAs SMF 28 Clean connectors before use Singlemode FC PC Connector FC PC 119 5146 00 Used on the TOP200 FC PC 119 4516 00 Used on light source and TOP400 N A RIFOCS MPC 10 Used for referencing setup A Laser Warning To prevent measurement errors clean the connector interface on the TOP400 hand held attenuator and all other fiber connectors and adapters before use Do not look directly into the output port of the laser source Do not use optical viewing instruments such as microscopes magnifiers etc to view active fibers The use of these devices on active fibers can focus a highly intense beam on to the retina which can result in permanent eye damage TOP400 Hand Held Att
78. ld what the response factor is at the various calibration wavelengths On the TOP200 and TOP220 optical power meters this calibration data is stored in an EEPROM electrically erasable programmable read only memory See Calibration Process section for further information TOP200 220 Optical Power Meters Service Manual Theory of Operation Detector saturation occurs when too much power falls onto one area of the detector surface Every detector has a power density limit Generally this limit is around 2mW mmf to 10mW mmr The TOP200 optical power meter utilizes a 1mm diameter InGaAs detector with a power limit of 3dBm Figure 2 1 shows the wavelength dependency of the TOP200 The TOP220 optical power meter utilizes a 2mm inGaAs detector with an attenuating filter This filter compensates for the wavelength dependency of the detector The User Manual has more information about the TOP 220 wavelength dependency The SOC adapter system assures that the fiber is correctly positioned at the right distance from the detector Singlemode fibers have a much narrower NA numerical aperture and therefore do not fill the detector window whereas large core area fibers often have a wider NA and cover the detector surface up to 90 with light Housing Ferrule Stop Light Baffle Active Surface Figure 2 2 Detector and SOC Adapter Alignment The SOC adapter is designed to position the connector ferrule at the exact center po
79. level must be below the specified upper limit upper adjustment limit for the TOP300 to maintain the Laser Safety Class rating For TOP140 products below S N B010260 and TOP150 below S N B010189 the original power setting at time of manufacture was 10 dBm Products in these serial number ranges should not be considered out of tolerance if output power as received is 10 dBm 0 5 dB However all TOP140 and TOP150 products regardless of serial number should be adjusted to 7 dBm 0 5 dB and the customer must be informed of the adjustment TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 2 3 Performance Verification Table 2 2 Power Output Specifications for TOP140 150 160 and 300 Model Power Output Power Sensor Meter Wavelength TOP140 7 dBm 40 5 dB long wavelength 1310 nm TOP 150 7 dBm 0 5 dB long wavelength 1550 nm TOP160 1310 nm 7 dBm 0 75 dB long wavelength 1310 nm TOP160 1550 nm 7 dBm 0 75 dB long wavelength 1550 nm TOP300 4 5 dBm nominal short wavelength 635 nm adjust 4 5 0 4 dB NOTE The CW power level tolerances are typical not warranted This section is a functional check Perform steps 1 and 2 only if adjustment is needed Other wise battery power may be used A 5 minute warm up is adequate for all tests 1 Remove the battery cover and batteries to gain access to the adjustment s 2 Set the variable power supply to 3 V and connect to the battery termin
80. mental regulations To clean battery contacts a Step 1 Remove battery compartment cover and the 2 AA batteries Avoid contact with leaking electrolyte Step 2 Remove each battery contact from its respective slot using needle nose pliers or equivalent Step 3 In case of corrosion build up on contacts scrape it off using an abrasive paper or the flat edge of a tool i e flat screwdriver Step 4 Apply reagent grade isopropyl alcohol on the contacts and brush off excess build up with cleaning brush into towel Step 5 Wipe exterior surface of battery contacts with dry paper towel to remove residual isopropyl alcohol Step 6 Apply a thin film of WD 40 lubricant on the battery contacts for protection Step 7 Place 2 new AA batteries and replace cover of the battery compartment Make sure that the batteries are positioned with the correct polarization Battery Contact Figure 3 4 Cleaning Battery Contacts TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 3 5 Maintenance Cleaning Cleaning the Instrument Case To clean instrument case 1 Step 1 Remove protective rubber bumper 1 Step 2 Wipe exterior surface of instrument case with clean paper towel wetted with a small amount of isopropyl alcohol NOTE Avoid using an excessive amount of alcohol for it may damage the labels at the rear of the instrument 1 Step 3 Wipe exterior surface of instrument case again with dry paper
81. n Snap On connector SOC interface A wide range of push pull SOC adapters are available covering all popular industry standard fiber optic connectors including FC ST SC SMA E2000 DIAMOND etc TOP 130 140 150 300 Fiber Optic Instruments Service Manual 1 3 General Information Product Information TOP140 TOP150 TOP160 Optical Laser Sources The TOP140 TOP150 and TOP160 Optical Laser Sources were developed in response to requests from the fiber optic industry for small rugged light sources for use in installing maintaining and researching singlemode telephony datacom CATV FDDI and other types of fiber optic links The instrument provides a convenient calibrated output to speed up transmission loss measurements The instrument provides the flexibility in a single unit to interface to all industry standard fiber optic connectors with high throughput repeatability and stability These palm sized optical laser sources incorporate high efficiency laser diodes with models offered to service each or both of the two singlemode windows 1310nm and 1550nm Internally the optical power is coupled via a fiber to the unique universal connector interface UCI This connector is of the highest quality and precision using a proprietary fiber alignment process and convex polish allowing physical contact of the fibers for optimum throughput This Super PC interface accepts both singlemode and multimode fibers minimizes insertion loss and
82. n Setup eese 3 2 Figure 3 2 Display Segment 3 3 Figure 4 1 Calibration 4 4 Figure 5 1 Cleaning the Connector 1 5 2 Figure 5 2 Cleaning the SOC 5 3 Figure 5 3 Cleaning the Fiber Connector 5 4 Figure 5 4 Cleaning Battery 5 5 Figure 5 5 Cleaning the Instrument 5 6 TOP200 220 Optical Power Meters Service Manual List of Illustrations vi TOP200 220 Optical Power Meters Service Manual Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 1 7 Table 1 8 Table 2 1 Table 3 1 Table 3 2 List of Tables Performance Characteristics eese 1 13 Power Requirements Characteristics 1 18 Display Features inicie eroe tpe tenerte 1 14 Size and Weight 1 14 Environmental 1 14 Certification and 1 15 Standard Accessories
83. nalog transmission quality critical to CATV and microwave on fiber applications m Digital bit error rates increase Coupled light power is reduced Receiver input power outside optimum operating range Dirty connectors may cause damage to their mated counterparts Do not touch the exposed ferrule tip of the connector interface with anything but a dry lint free cloth In severe cases you will need to use a reagent grade isopropyl alcohol When not in use keep the connector interface covered with the protective dust cap TOP400 Hand Held Attenuator Service Manual 5 1 Maintenance Cleaning Cleaning the Connector Interface To clean the connector interface Step 1 Remove the dust cap to expose the connector interface Step 2 there is a UCI adapter present remove it as shown in Figure 1 2 in the Operator Information section L Step 3 Clean the connector interface with a dry lint free cloth as shown in Figure 5 1 In severe cases you will need to use reagent grade isopropyl alcohol IPA O Step 4 Wipe the connector interface again with a fresh dry lint free cloth to remove residual alcohol O Step 5 Clean exterior of connector interface housing with clean lint free cloth Figure 5 1 Cleaning the Connector Interface 5 2 TOP400 Hand Held Attenuator Service Manual Maintenance Cleaning Cleaning the UCI Adapter adapters are interchangeable to accommodate all popular industry standar
84. nnector ferrule with the detector window Additional SOC adapters may be ordered by Tektronix part number Table 1 8 SOC Adapter Selection Chart TOP200 SOC Adapters Connector Types Tektronix Part Number Biconic 119 5168 00 D4 PC 119 5167 00 HMS 10 HP 119 5171 00 DIAMOND 2 5 DIAMOND 3 5 119 5172 00 DIN PC 119 5166 00 DIN APC HRL 10 119 5166 00 E2000 PC 119 5165 00 E2000 APC 119 5165 00 FC PC 119 5146 00 FC APC 119 5146 00 SC PC 119 5145 00 SC APC 119 5145 00 SMA 905 906 119 5169 00 SMA 2 5 119 5170 00 119 5144 00 1 18 TOP200 220 Optical Power Meters Service Manual Optical Detector Theory of Operation This section describes the theory of operation for the TOP200 and TOP220 optical power meters to provide a basic overview of how the instrument operate Power meters in general consist of five components m Optical Detector A D Converter w Micro Processor Unit m Display and Display Driver m Power Supply See Figure 2 3 for system overview The optical detector converts incident light power to electrical current The optical detector is also called a photodiode because it is a semiconductor PIN junction and its electrical behavior is just like a diode The energy of the photons absorbed on the detector surface frees up trapped electrons within the PIN junction The relationship of photonic energy versus electrical current is highly linear The optical response of the detector is
85. nscnscesseesseenencerseae 1 4 A 1 5 LCD 1 5 Optical Interface 1 5 Rubber BUMPER sic venscncsncssctestnccnsdeccecsnncssucenenetsvonnseensna 1 5 Structural Integrity s csscsscccssessnssscascncevsseorsesenee 1 5 DUST Cap eei c 1 5 Operator Information sssssesesssssssssnsessesssessneeesssseereees 1 7 Labeled Buttons and Switches 1 8 Connector Interface 1 9 TOP200 220 Optical Power Meters Service Manual Table of Contents Theory of Operation Performance Verification Battery Information eo iiucc o ccuie ecce 1 11 Power Supply Circuitry ecce eere 1 11 Battery 1 11 General Specifications ccce 1 13 Performance 1 13 Power Requirements Characteristics 1 13 Display Features M 1 14 Size and Weight 1 14 Environmental Specifications 1 14 EMC GComplialiee itr ux dua UE nns 1 15 Accessories and
86. nt dust from accumulating and to avoid scratching the detector window TOP200 220 Optical Power Meters Service Manual 5 1 Maintenance Cleaning Cleaning the Connector Interface To clean the connector interface Step 1 Remove the dust cap to expose the connector interface Step 2 If there is a SOC adapter present remove it as shown in Figure 1 3 page 1 9 in the section marked Operator Information 1 Step 3 Clean the exposed detector window with a dry lint free cloth as shown in Figure 5 1 In severe cases you will need to use reagent grade isopropyl alcohol IPA Step 4 Wipe the detector window again with a fresh dry lint free cloth to remove residual alcohol O Step 5 Clean exterior of SOC housing with clean lint free cloth DML j m e 70 5 8 Figure 5 1 Cleaning the Connector interface To prevent it from being damaged do not exceed pressure onto the detector window 5 2 TOP200 220 Optical Power Meters Service Manual Maintenance Cleaning Cleaning the SOC Adapter SOC adapters are interchangeable to accommodate all popular industry standard fiber optic connectors and must always be cleaned before each and every use To clean SOC adapters Step 1 Using a clean lintless swab insert the swab into the thru hole of the adapter Step 2 Clean exterior and interior surfaces using a lint free cloth wetted with reagent grade isopropyl alcoho
87. nt occurs the function is executed For example the dB dBm function toggles the reference power unit from 1mW to the relative unit of the last reading Although the power meter is powered by two AA batteries a power supply circuit efficiently utilizes this precious battery power This power supply circuitry uses two inductors to boost the 3V battery voltage to 5V The battery voltage can drop all the way down to 1V and the power meter will still work While the power meter is switched ON a higher start up current is required Therefore it is important to keep the battery terminals clean TOP200 TOP220 Operation 2 4 The TOP200 and TOP220 optical power meters design follows the basic concept for power meters To improve the readout settling time the transimpedance amplifier is improved by integrating components which are controlled by the microcontroller 200 220 Optical Power Meters Service Manual jenuew 5 51949 29NdO 022 002401 9 2 5 4 AID Converter Micro Processor 8751 Transimpedance Amplifier Display LCD Display weibeig uieis S 2 6 200 220 Optical Power Meters Service Manual Performance Verification Performance verification verifies that the optical power meter is operating properly and within specification If the sp
88. o interchange UCI adapters for the TOP 140 150 160 and 300 instruments 1 Step 1 Firmly press the adapter over the interface ferrule until it reaches the stop Step 2 Rotate the adapter body until the anti rotation pin engages Step 3 Firmly tighten the knurled adapter shell Step 4 To remove simply unscrew the adapter Figure 1 6 Interchanging the UCI Adapter 1 16 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Operator Information To interchange SOC adapters for the TOP130 Dual LED Source O Step 1 Locate the anti rotation key on the TOP 130 Fiber Optic Instruments connector interface Step 2 With the keyway properly aligned slip the SOC adapter over the connector interface until fully locked into place indicated by a snap DL Step 3 To remove SOC adapter pull adapter off the connector interface The adapter is firmly sealed and it requires considerable force to pull it off Figure 1 7 Interchanging the SOC Adapter TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 17 General Information Operator Information 1 18 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Battery Information The TOP 130 140 150 160 300 Fiber Optic Instruments are designed to operate on two standard 1 5V AA batteries Low battery status is indicated when the front panel LED indicator is blinking You may continue to operate the instrumen
89. o select the appropriate modulation frequency The modulating mode is best used with the TOPSOO Visual Fault Finder for viewing or finding faults within the fiber The modulating laser light can be detected far more easily even in a bright lit environment TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 1 5 General Information Product Information Other Features Optical Interface Features m Easily cleanable connector adapter Refer to Cleaning and Troubleshooting section for cleaning procedures m SOC and UCI adapters are field changeable and must match the type of fiber connector being used Refer to Accessories and Options section for connector adapter options Rubber Bumper Every instrument includes a removable rubber bumper This molded silicone shell acts to protect against shock in the field m rubber bumper includes a pivoting bail to hold the instrument upright when required Structural Integrity m The series instrument can take falls and is highly crush resistant The unit provides reliable and accurate measurements from 15 C to 55 C Dust Cap The permanently attached dust cap simply snaps into place m There is no need to remove the adapter the dust cap fits over all adapters 1 6 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Operator Information This section summarizes the TOP 130 140 150 160 300 Fiber Optic Instruments s
90. o their mated counterparts Do not touch the exposed ferrule tip of the connector interface with anything but a dry lint free cloth In severe cases you will need to use a reagent grade isopropyl alcohol When not in use keep the connector interface covered with the protective dust cap TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 3 1 Maintenance Cleaning Cleaning the Connector Interface To clean the connector interface Step 1 Remove the dust cap to expose the connector interface Step 2 If there is a SOC or UCI adapter present remove it as shown in Figure 1 5 and 1 6 in the Operator Information section Step 3 Clean the connector interface with a dry lintfree cloth as shown in Figure 3 1 In severe cases you will need to use reagent grade isopropyl alcohol IPA Step 4 Wipe the connector interface again with a fresh dry lintfree cloth to remove residual alcohol Step 5 Clean exterior of connector interface housing with clean lintfree cloth Figure 3 1 Cleaning the Connector Interface TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Maintenance Cleaning Cleaning the SOC or UCI Adapter SOC or UCI adapters are interchangeable to accommodate all popular industry standard fiber optic connectors and must always be cleaned before each and every use To clean SOC or UCI adapters O Step 1 Using a clean lintless swab RIFOCS P N 946 insert the swab
91. ocedures for fiber optic test equipment Before Servicing To prevent injury to yourself or damage to equipment a You must be a qualified service technician Read the Safety Summary at the beginning of this manual Heed all warnings cautions and notes in this manual TOP400 Hand Held Attenuator Service Manual ix Preface What You Will Find in this Manual Related Documents Tektronix Service Contacting Tektronix Phone Address Web site Sales support Service support Technical support General Information General product and operator information Specifications Accessories and options Performance Verification Procedures for verifying that the TOP400 hand held attenuator functions properly and meet warranted operating specifications Calibration Procedures Procedures to calibrate the TOP400 hand held attenuator Maintenance Cleaning procedures General troubleshooting and fault isolation Replaceable Parts Part numbers and ordering information The TOP400 Hand Held Attenuator User Manual PN 071 0041 00 Tektronix provides service to cover repair under warranty and post warranty problems The TOP400 hand held attenuator is warranted for one year The warranty statement appears at the beginning of this manual 1 800 833 9200 Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA www tektronix com 1 800 833 9200 select option 1
92. other replacement parts TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual 4 1 Replaceable Parts Replaceable Parts Tektronix Part Number Qty Name and Description STANDARD ACCESSORIES 348 1480 00 1 Rubber Bumper with Pivoting Bail 119 4513 00 2 Adapter ST Snap On Connector SOC for TOP130 119 5115 00 1 Adapter FC PC Universal Connector Interface UCI for TOP 140 150 160 and 300 070 9372 01 1 Manual Tech User TOP 130 140 150 160 200 300 User Manual 006 8134 00 1 Alcohol Packet with Application Note 4 2 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual accessories SOC adapters 1 30 standard 1 29 UCI adapters 1 30 battery cautionary notes 1 19 power supply circuitry 1 19 replacement 1 19 battery contacts cleaning 3 5 C cleaning battery contacts 3 5 cautionary notes 3 1 connector interface 3 2 fiber optic connector 3 4 instrument case 3 6 SOC adapter 3 3 UCI adapter 3 3 connector interface cleaning 3 2 F fiber optic connector cleaning 3 4 frequency select 1 14 Operating Mode CW Mode 1 5 MOD Mode 1 5 operator information connector interface 1 15 TOP130 1 8 TOP140 1 10 TOP150 1 10 TOP160 1 12 TOP300 VFF 1 14 optical interface features 1 6 P performance problems 3 7 performance verification Low Battery 2 8 source level verification 2 2 wavelength 2 5 R replaceable parts instrument repla
93. own 70 minute after last key has been depressed Shut Off Disable Disables the 70 minute power shut off Recalibration Unit can be recalibrated by user following procedures in Calibration Process section CAL switch located inside battery compartment Connector Interface snap on connector SOC Interface See Accessories and Options 1 Tektronix Calibration Conditions Power 30 dBm TOP200 10 dBm TOP220 Wavelengths 850 1 nm TOP200 980 1 nm TOP220 1310 20 nm and 1550 20 nm TOP200 220 Test Fibers See the Equipment Required list in the performance Verification section Power Requirements Characteristics Table 1 2 Power Requirements Characteristics Power Source TOP200 TOP220 Battery 2 AA Alkaline Batteries 1 5V Typical Battery Life 2100 hours Power Supply Circuitry Increases 3V battery voltage to 5V TOP200 220 Optical Power Meters Service Manual 1 1 E General Specifications 1 14 TOP200 220 Optical Power Meters Service Manual EMC Compliance Table 1 6 Certifications and compliances Category EC Declaration of Conformity EMC Standards or description Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 61326 EMC requirements for Class A electrical equipment for measurement control and laboratory IEC 61000 4 2 Electrostatic disc
94. r designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTI
95. ristics 1 22 Table 1 4 Size and 1 23 Table 1 5 Environmental Specifications esee 1 23 Table 1 6 Certifications and 1 25 Table 1 7 Standard 55 5 1 27 Table 1 8 SOC UCI Adapter Selection Chart 1 28 Table 2 1 Required Equipment eese 2 1 Table 2 2 Power Output Specification for TOP 140 150 160 and 300 einen T 2 4 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual vii List of Tables viii TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Replace Batteries Properly Replace batteries only with the proper type and rating specified Use Proper AC Adapter Use only the AC adapter specified for this product Do Not Operate Without Covers Do not operate this product with
96. ristics Table 1 1 Performance Characteristics of the 400 Hand Held Attenuator Characteristic Specification Insertion Loss 2dB 1 25dB typical Retum Loss 40dB Attenuation Range 0 35dB Maximum Input Power 23dBm Fiber Compatibility Singlemode SMF 28 Optical Interface Universal Connector Interface UCI Adapters See Table 1 3 for available UCI adapters Operating Environment 15 C to 60 C 0 95 RH non condensing Storage Environment 35 C to 70 C 0 95 RH non condensing Weight 310g 8 1 02 Size WxHxD 72 x 142 x 35mm 2 8 x 5 6 x 1 4 in Specifications subject to change without notice The insertion loss is the intrinsic loss of the instrument with the dial set to 0 dB TOP400 Hand Held Attenuator Service Manual 1 7 General Information Specifications 1 8 TOP400 Hand Held Attenuator Service Manual Accessories and Options Standard Accessories Standard accessories are included with the instrument or may be ordered by TEKTRONIX part number Table 1 2 Standard Accessories Accessory TEKTRONIX Part Number User Manual 071 0041 00 Rubber Bumper w Bail 348 1480 00 TOP400 Hand Held Attenuator Service Manual 1 9 General Information Accessories and Options Optional Accessories This service manual is an optional accessory and can be ordered by Tektronix part number 070 9379 03 UCI adapters are interchangeable to accommodate a number of connector adapters A UCI adapter is used to align
97. s Fiber Distance eese 2 1 Wavelength Dependency 2 2 Initial Power Meter Referencing eese 4 2 Setup for Insertion Loss Alignment 4 3 104 Point Verification 4 3 Location of Set Screw 4 4 Cleaning the Connector 5 2 Cleaning the UCI 5 3 Cleaning the Fiber Connector 5 4 Cleaning the Instrument 5 5 List of Tables Performance Characteristics of the TOP400 Hand Held Lucem EE 1 7 Standard 550 65 1 9 SOC UCI Adapter Selection Chart 1 10 Sample Test Specification 3 3 Table of Contents vi TOP400 Hand Held Attenuator Service Manual Safety Summary These terms appear in the manual CAUTION statements identity conditions or practices that could result in damage to the instruments or other property wm wanna statements identify conditions or practices that could result in personal injury This symbol appears in the manual A Laser Warning Power Sources The TOP400 hand held attenuator does not require any batteries to operate Laser Radiation There is no active source inside the TOP400 but be aware that light sources may be connected to it W
98. s Service Manual Troubleshooting No Power On If the TOP200 or TOP220 optical power meter does not power on properly the most likely cause is a discharged battery battery installed improperly or a defect on the meter Typical indications of a discharged battery are No power when turned ON annunciator on top left hand corner of LCD Faint LCD display When the B annunciator first appears on the LCD the power meter has five hours left before the batteries must be replaced Replace the discharged batteries with new ones If the power meter still does not power on properly replace the instrument Error Messages Error Message Description Possible Solutions 1 Partial loss of calibration data Turn power OFF and ON again If error message repeats replace instrument Total loss of memory Replace instrument E5 Stack overflow Turn power OFF and ON again If OK check calibration If error message repeats replace instrument Performance Problems Problem Possible Solutions LCD has missing pixels Replace instrument Power meter does not respond to button Replace instrument presses or switching power ON OFF 60dBm measurement is out of spec Replace instrument Out of calibration Clean detector and recalibrate unit TOP200 220 Optical Power Meters Service Manual 5 7 Maintenance Troubleshooting 5 8 200 220 Optical Power Meters Service Manual Replaceable Parts Th
99. s to accommodate all popular industry standard fiber optic connectors To interchange SOC adapters 1 Step 1 Locate the anti rotation key on the TOP200 optical power meter connector interface O Step 2 With the keyway properly aligned slip the SOC adapter over the connector interface until fully locked into place indicated by a snap Step 3 To remove SOC adapter pull adapter off the connector interface The adapter is firmly sealed and it requires considerable force to pull it off Figure 1 3 Changing the SOC Adapter TOP200 220 Optical Power Meters Service Manual 1 9 General Information Operator Information 1 10 200 220 Optical Power Meters Service Manual Battery Information The TOP200 and TOP220 optical power meters are designed to operate on two standard 1 5V AA batteries Low battery status is indicated when the letter B is displayed in the top left hand corner of the LCD display After LowBat indicator appears the operator has at least five hours before the battery must be replaced Power Supply Circuitry A power supply circuitry efficiently uses the precious battery power The power supply circuitry uses two inductors to boost the 3V battery voltage to 5V The battery voltage can drop all the way to 1V and the power meter will still operate Battery Replacement To replace the batteries Step 1 Remove rubber bumper Step 2 Remove battery cover by pressing on the center of the
100. set reference 5 00 4 88 5 12 20 00 10 12 9 88 30 00 20 12 19 88 40 00 30 12 29 88 50 00 40 12 39 88 NOTE For TOP220 leave out the 30 to 50 dBm tests TOP200 220 Optical Power Meters Service Manual 3 7 Performance Verification 3 8 TOP200 220 Optical Power Meters Service Manual Adjustment Process This section describes the optical adjustment process for the TOP200 optical power meter Equipment Required See Table 3 1 for equipment required To prevent measurement errors clean detector interface on the TOP200 TOP220 optical power meters and all other fiber connectors and adapters before use Do not look directly into the output port of the laser source Do not use optical viewing instruments such as microscopes magnifiers etc to view AX active fibers The use of these devices on active fibers can focus a highly intense beam on to the retina which can result in permanent eye damage Laser Aperature Setup Figure 4 1 illustrates how the light source attenuator reference optical power meter and power meter under calibration are connected for adjustment ATTENUATOR Light Source REFERENCE OPTICA POWER METER OPTICAL POWER METER UNDER CALIBRATION Figure 4 1 Adjustment Setup TOP200 220 Optical Power Meters Service Manual 4 1 Adjustment Process Adjustment 1 To set the device under test DUT to the CAL adjustment mode a Turn power off b
101. sition for best repeatability Unlike threaded adapters the SOC adapter aligns on the cylindrical surface and thus greater repeatability is achieved The SOC adapter may be removed for cleaning the detector window or it may be interchanged to accommodate a number of connector adapters NOTE It is important to always keep the detector window clean TOP200 220 Optical Power Meters Service Manual 2 3 Theory of Operation A D Converter Micro Processor Power Supply The analog voltage signal of the transimpedance amplifier must be converted to a digital number Optical power meters employ a unique current to frequency converter The microprocessor measures the period of the frequency signal and thus can accurately measure the current of the optical detector Of course the time period is inversely proportional to the analog current The microprocessor program easily and accurately converts the signal to its real value The micro processor s job is to perform the calculation from linear units to logarithmic dB units The formulas for this conversion are dBm 10 log Pin 1mW dBm is an absolute power unit based on 1mW dB 10 log Pin Pret P 15 normally the last stored reading The micro processor also retrieves the calibration data from the EEPROM memory based on the wavelength selection Another function of the micro processor is to scan the two key board buttons and the CAL switch Whenever a user eve
102. t numbers and ordering information The first section in this manual General Information contains product information user information specifications accessories and options If you have no need for this information go directly to the other sections TOP400 Hand Held Attenuator Service Manual Product Information This section briefly describes the TOP400 hand held attenuator A quick review of this section will familiarize you with the TOP400 hand held attenuator which may help when servicing the instrument For complete product information refer to the TOP400 Hand Held Attenuator User Manual Product Package The TOP400 hand held attenuator is supplied with the following equipment and standard accessories m One rubber bumper with bail m Two universal connector interface UCI adapters per customer order m One user manual 071 0041 00 m One calibration certificate Product Description The TOP400 hand held attenuator is the first truly palm sized low back reflection singlemode optical attenuator designed for actual field use This attenuator utilizes a proprietary scheme for the attenuating mechanism Small size and large dial indicator make this instrument an indispensable tool for fiber optic line commissioning bit error rate BER measurements system margin analysis and receiver sensitivity testing It is also versatile enough to be used as an optical potentiometer in the laboratory where the optical power has
103. t until the front panel LED shuts off However the optical output may not be stable while the battery discharges past this LOW BATTERY point Power Supply Circuitry power supply circuitry is used to utilize efficiently the precious battery power The power supply circuitry uses two inductors to boost the 3V battery voltage to 5V The battery voltage can drop all the way to 1V and the power meter will still operate Battery Replacement To replace the batteries O Step 1 Remove rubber bumper O Step 2 Remove battery cover by pressing on the center of the cover while pulling on its sides O Step 3 Remove used batteries and discard Replace with new batteries O Step 4 Replace battery cover O Step 5 Replace rubber bumper NOTE Observe the correct polarization as indicated in the bottom of the battery compartment Failure to properly install the batteries in the correct orientation may damage the instrument Please discard batteries according to local environmental regulations PUSH PULL 9 N Figure 1 8 Battery Replacement TOP 130 140 150 300 Fiber Optic Instruments Service Manual 1 19 General Information Battery Information 1 20 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Specifications Performance Characteristics Table 1 1 Performance Characteristics TOP130 TOP140 TOP150 TOP300 Characteristic TOP130 TOP140 TOP150 TOP300 Source Type LED LED Fabry Perot
104. t using needle nose pliers or equivalent Step 3 In case of corrosion build up on contacts scrape it off using an abrasive paper or the flat edge of a tool i e flat screwdriver Step 4 Apply reagent grade isopropyl alcohol on the contacts and brush off excess build up with cleaning brush into towel Step 5 Wipe exterior surface of battery contacts with dry paper towel to remove residual isopropyl alcohol Step 6 Apply a thin film of WD 40 on the battery contacts for protection Step 7 Place two new AA batteries and replace cover of the battery compartment Make sure that the batteries are positioned with the correct polarization Battery Contact Figure 5 4 Cleaning Battery Contacts TOP200 220 Optical Power Meters Service Manual 5 5 Maintenance Cleaning Cleaning the Instrument Case To clean instrument case Step 1 Remove protective rubber bumper O Step 2 Wipe exterior surface of instrument case with clean paper towel dampened with a small amount of isopropyl alcohol NOTE Avoid using an excessive amount of alcohol for it may damage the labels at the rear of the instrument Do not use alcohol on the LCD display Alcohol leaves a film on the display Use clean dry paper towel instead O Step 3 Wipe exterior surface of instrument case again with dry paper towel 1 Step 4 Replace rubber bumper Tektromix Figure 5 5 Cleaning the Instrument Case 5 6 TOP200 220 Optical Power Meter
105. th Pivoting Bail 119 4513 00 1 Adapter ST snap on connector SOC 070 9372 01 1 Manual Tech User TOP 130 140 150 160 200 300 Fiber Optic Instruments 6 2 TOP200 220 Optical Power Meters Service Manual Tektronix Part Number Qty Replaceable Parts Name and Description EL I A EAT SED m PL OI IEC RE SE EE EPI LTR ATT 119 5168 00 119 5167 00 119 5171 00 119 5172 00 119 5166 00 119 5165 00 119 5146 00 119 5145 00 119 5169 00 119 5170 00 070 9379 02 cA OPTIONAL ACCESSORIES Adapter Biconic snap on connector SOC Adapter D4 PC snap on connector SOC Adapter HMS 10 HP DIAMOND 2 5 snap on connector SOC Adapter DIAMOND 3 5 snap on connector SOC Adapter DIN snap on connector SOC Adapter E2000 snap on connector SOC Adapter FC snap on connector SOC Adapter SC snap on connector SOC Adapter SMA 905 906 snap on connector SOC Adapter SMA 2 5 snap on connector SOC Manual Tech Service TOP200 and TOP220 TOP200 220 Optical Power Meters Service Manual 6 3 Replaceable Parts 6 4 200 220 Optical Power Meters Service Manual accessories SOC adapters 1 18 standard 1 17 adjustment 4 1 battery cautionary notes 1 11 power supply circuitry 1 11 replacement 1 11 battery contacts cleaning 5 5 block diagram system overview 2 5 C CAL switch 4 1 case assembly cleaning 5 6 cleaning batter
106. the reference power meter wave length set to the actual laser wavelength and the DUT wavelength set to 1550 nm To exit CAL mode when adjustment is complete a Turn power off b Set the CAL switch to the OP position c Place a tamper evident seal over the switch d Install batteries and battery cover NOTE Fiber optic power measurements are sensitive to connector quality and cleanliness and other factors that can increase uncertainty Be sure to repeat the Accuracy Verification procedure after completing the Adjustment Procedure 4 4 200 220 Optical Power Meters Service Manual Maintenance Cleaning Procedures This section discusses cleaning procedures for the connector interface SOC adapters fiber optic connectors battery contacts and instrument case It is absolutely critical to maintain the cleanliness off all connector interfaces adapters and fiber optic connectors each and every time they are used to guarantee maximum performance by the TOP200 and TOP220 optical power meters Improper maintenance practices cause the following performance degradation w Measurement errors Dirty connectors may cause damage to their mated counterparts Do not touch the detector window of the connector interface with anything but a dry lint free cloth In severe cases you will need to use a reagent grade isopropyl alcohol When not in use keep the connector interface covered with the protective dust cap to preve
107. tive Ground Refer to Manual Insulated Earth Terminal Laser 140 150 160 TOP300 ER DO NOTSTARE INTO BEAM 1 mW max at 630 670 nm CLASSI LASER PRODUCT CLASS I LASER PRODUCT TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual xi General Safety Summary xii TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Safety Summary Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service proce dures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components avoid electric shock do not touch exposed connections TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual xiii Safety Summary xiv TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual Preface This manual is used for servicing the TOP 130 140 150 160 and 300 Fiber Optic Instruments to instrument lev
108. to be adjusted quickly and efficiently The 400 features the precision universal connector interface UCI for PC style connectors which offers low insertion loss and excellent stability The universal interface allows for quick adoption of most industry standard connectors Furthermore cleaning of the interface is accomplished by simply removing the adapter which exposes the ferrule The attenuator is completely mechanical and does not require any batteries TOP400 Hand Held Attenuator Service Manual 1 3 General Information Product Information Features Optical Interface Features Easily cleanable connector adapter Refer to the Cleaning and Troubleshooting section for cleaning procedures UCI adapters are field changeable and must match the type of fiber connector being used Refer to the Accessories and Options section for connector adapter options NOTE Do not match APC with non APC adapters or connectors or you will acquire erratic readings Rubber Bumper The TOP400 includes a removable rubber bumper This molded silicone shell acts to protect against shock in the field The rubber bumper includes a pivoting bail to hold the instrument upright when required Structural Integrity wm The TOP400 can take falls and is highly crush resistant m The unit provides reliable and accurate measurements from 15 C to 60 Dust m The attached dust cap simply snaps into place w There is no need to
109. to connect the laser to the attenuator input and the attenuator output to the reference power sensor Set the reference power meter wavelength to the nominal laser wavelength Adjust the attenuator for a reading on the reference power meter of 30 00 dBm TOP200 or 10 00 dBm TOP220 Disconnect the fiber from the reference power meter and connect it to the DUT Set the DUT wavelength to the nominal laser wavelength 850 or 980 nm by pressing the button Press the DUT dB dBm button to indicate in dBm and check for a reading between 30 25 and 29 75 dBm TOP200 or 10 25 to 9 75 dBm TOP220 NOTE Fiber optic power measurements are sensitive to connector quality and cleanliness and other factors that can increase uncertainty It is recommended that the power accuracy verification tests be done at least twice to check repeat ability If the measure results don t repeat within about 0 10dB then cleaning of connectors or replacement of cables or adapters may be needed 12 13 14 For the remaining steps use the single mode attenuator single mode fibers and long wavelength power sensor Zero the reference power meter with the power sensor covered Use the fibers to connect the 1310 nm laser to the attenuator input and the attenuator output to the reference power sensor TOP200 220 Optical Power Meters Service Manual 15 16 17 18 19 20 21 Performance Verification Set the reference
110. umper eere reete eese nennen enne nunt 1 4 Structural Integrity 1 4 DUST Cap Pm 1 4 Operator Information ccsccsesseneeseeeeessnessseeeseceeeeenenensanes 1 5 Connector Interface sscccccccsssssssesnnssnnsnsssnssenssssenseueseenes 1 6 General Specifications 1 7 Performance Characteristics eee 1 7 Accessories and Options cccssssesssssenssnsesenssssssenreecsenss 1 9 Standard 1 9 Optional 1 10 400 Hand Held Attenuator Service Manual i Table of Contents Theory of Operation Principle of Operation crecer rere eere 2 1 Wavelength 2 2 Performance Verification Required Equipment ecce cL 3 1 Insertion Loss Verification 3 2 10dB Dial Setting Verification 3 3 Maximum Loss 3 3 Return Loss 3 3 Adjustment Process Required
111. witch and LED functions as well as changing the modulation frequency and interchanging the Snap on Connector SOC and Universal Connector Interface UCI adapters A quick review of this section will familiarize you with the basic operation of the TOP 130 140 150 160 300 Fiber Optic Instruments which may help when servicing the instrument For complete operator information refer to the TOP 130 140 150 160 200 300 Fiber Optic Instruments User Manual TOP 130 140 150 300 Fiber Optic Instruments Service Manual 1 7 General Information Operator Information TOP130 Dual LED Source Connector Interfaces 850nm ON and Low Battery Indicator 1300nm ON and Low Battery Indicator Wavelength Select Switch OFF CW MOD Select Switch Modulation Frequency Switch Figure 1 1 TOP130 Dual LED Source Switch and LED Locations NOTE These pictures and descriptions are for products with serial numbers at B019999 and below The latest TOP products user manual has pictures and descriptions for products with serial numbers of B020000 and up 1 8 TOP 130 140 150 160 300 Fiber Optic Instruments Service Manual General Information Operator Information Labeled Switches and LEDs 850nm EN 4300nm The Wavelength Select switch determines which LED is active 850nm or 1300nm o The 850nm Indicator Low Battery Indicator is on when the 850nm LED is 850nm active It is also used as an indicator for low battery pow
112. y contacts 5 5 cautionary notes 5 1 connector interface 5 2 fiber optic connector 5 4 instrument case 5 6 SOC adapter 5 3 connector interface cleaning 5 2 D dB dBm button 1 8 E EMC compliance 1 15 error messages 5 7 F fiber optic connector Cleaning 5 4 L lambda button 1 9 linearity test 3 6 operating mode 1 4 operator information buttons and switches 1 8 connector interface 1 9 optical interface description 1 4 features 1 5 P performance problems 5 7 performance verification accuracy verification 3 3 display check 3 3 equipment required 3 1 linearity verification 3 6 setup 3 2 software revision check 3 3 POWER Switch 1 8 R replaceable parts instrument replacement 6 1 optional 6 3 ordering information 6 1 standard 6 2 rubber bumper 1 5 Index S safety xiii laser radiation 1 1 symbols xi terminology x service information adjustment 4 1 cleaning 5 1 overview 1 1 performance verification 3 1 theory of operation 2 1 troubleshooting 5 7 SOC adapters cleaning 5 3 interchanging 1 9 optional 1 24 specification environmental 1 14 specifications display 1 14 performance 1 13 power 1 13 size and weight 1 14 T theory of operation A D converter 2 4 micro processor 2 4 optical detector 2 1 power supply 2 4 TOP200 description 1 3 environmental specifications 1 14 operator information
113. zes you with the basic operation of the TOP200 and TOP220 optical power meters which will help when servicing the instrument For complete operator information refer to the TOP Series Fiber Optic Instruments User Manual s Connector Interface LCD Display Operating Wavelength Low Battery Inidator Indicator Calibration Mode Indicator ON OFF Wavelength Select Absolute and Relative Measurements Calibration Switch Figure 1 2 Instrument Button and Switch Locations TOP200 220 Optical Power Meters Service Manual 1 7 General Information Operator information Labeled Buttons dB The ON OFF slide switch the dB dBm button and the A button are the basic operator controls to operate the TOP200 and TOP220 optical power meters This simple design allows ease of operation The ON OFF button controls the power of the TOP200 optical power meter The dB dBm button toggles between dBm and dB mode It also sets the new dB reference by holding the button for 3 seconds until the r annunciator appears To disable the Auto Shutoff feature with the unit off hold down the dB dBm button then press the ON OFF button When dBm is displayed the reading reflects the absolute measurement of the power of a fiber optic source dBm 10 Logo w 1mW When dB is displayed all subsequent readings are displayed relative to the reference power level P dB 10 Log mW _ Pret mW To establish a n

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TOP Series Fiber-Optic Instruments Service Manual Volumes 1, 2, &amp; 3

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TOP Series Fiber-Optic Instruments Service Manual Volumes 1, 2, & 3