Helwett Packard 83482A User Manual

Optical/electrical plug-in module

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  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 User’s Guide HP 83482A Optical/Electrical Plug-In Module...
  • Page 3 © Copyright Hewlett-Packard The AC symbol is Warranty. disclaims the implied warran- Company 1999 This Hewlett-Packard instru- ties of merchantability and fit- used to indicate the All Rights Reserved. Repro- ment product is warranted ness for a particular purpose. required nature of the duction, adaptation, or trans- against defects in material and line module input power.
  • Page 4 General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publica- tion 1010, Safety Requirements for Electronic Measuring Apparatus, and has been supplied in a safe condition. The instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
  • Page 5 When you use improper cleaning and handling techniques, you risk expensive instrument repairs, damaged cables, and compromised measure- ments. Before you connect any fiber-optic cable to the HP 83482A optical/electrical plug-in module, “Cleaning Connections for Accurate Measurements” on page...
  • Page 6: Table Of Contents

    Step 1. Inspect the Shipment 1-3 Step 2. Install the Plug-in Module 1-4 Returning the Instrument for Service 1-5 Channel Setup Menu The HP 83482A Optical/Electrical Plug-In Module 2-2 Options and Accessories 2-3 The HP 83482A Optical/Electrical Plug-In Module 2-4 Menu and Key Conventions 2-9...
  • Page 7 Contents Contents-2...
  • Page 8: Getting Started

    Step 1. Inspect the Shipment 1-3 Step 2. Install the Plug-in Module 1-4 Returning the Instrument for Service 1-5 Getting Started...
  • Page 9 Getting Started Getting Started Getting Started The instructions in this chapter show you how to install your HP 83482A opti- cal/electrical plug-in module. Refer to Chapter 2, “Channel Setup Menu” for information on operating the plug-in module. Refer to Chapter 3, “Calibration Overview”...
  • Page 10: Step 1. Inspect The Shipment

    1 Verify that all system components ordered have arrived by comparing the shipping forms to the original purchase order. Inspect all shipping containers. The shipment includes: • HP 83482A optical/electrical plug-in module with the ordered options and adapters. • APC 3.5 (f-f) adapter, HP part number 1250-1749.
  • Page 11: Step 2. Install The Plug-In Module

    You do not need to turn off the mainframe to install or remove the plug-in modules. If you wish to use the HP 83482A optical/electrical plug-in module in an HP 54750A digitizing oscilloscope, a firmware upgrade must first be installed.
  • Page 12: Returning The Instrument For Service

    Getting Started Returning the Instrument for Service Returning the Instrument for Service The instructions in this section show you how to properly package the instru- ment for return to a Hewlett-Packard service office. For a list of offices, refer to “Hewlett-Packard Sales and Service Offices” on page 5-15.
  • Page 13 Getting Started Returning the Instrument for Service Preparing the instrument for shipping 1 Write a complete description of the failure and attach it to the instrument. Include any specific performance details related to the problem. The following information should be returned with the instrument. •...
  • Page 14 Getting Started Returning the Instrument for Service • For instruments weighing less than 54 kg (120 lb), use a double-walled, cor- rugated cardboard carton of 159 kg (350 lb) test strength. • The carton must be large enough to allow 3 to 4 inches on all sides of the instrument for packing material, and strong enough to accommodate the weight of the instrument.
  • Page 15 Getting Started Returning the Instrument for Service...
  • Page 16: Channel Setup Menu

    The HP 83482A Optical/Electrical Plug-In Module 2-2 Options and Accessories 2-3 Front panel of the plug-in module 2-5 Menu and Key Conventions 2-9 Channel Setup Menu 2-10 Displaying the Channel Setup Menus 2-13 Channel Setup Menu...
  • Page 17: The Hp 83482A Optical/Electrical Plug-In Module

    The optical channel frequency response is designed to minimize distortion of the displayed optical pulse. To achieve this performance the HP 83482A does not include any provision for switching a SONET/SDH filter into the channel. For applications requiring a switched SONET/SDH filter, an HP 83485A or 83485B plug-in module should be used.
  • Page 18: Options And Accessories

    Channel Setup Menu Options and Accessories Options and Accessories HP 83482 options Option 001 Latest operating system firmware for the HP 83480A mainframe Option 002 Latest operating system firmware for the HP 54750A mainframe Option UK6 Calibration certificate with data Optical connector Option 011 Diamond HMS-10/HP interface options...
  • Page 19: The Hp 83482A Optical/Electrical Plug-In Module

    NOTE If you wish to use the HP 83482A optical plug-in module in an HP 54750A digitizing oscil- loscope, a firmware upgrade must first be installed. Order the HP 83480K communica- tions firmware kit and follow the installation instructions.
  • Page 20: Front Panel Of The Plug-In Module

    Channel Setup Menu The HP 83482A Optical/Electrical Plug-In Module Front panel of the plug-in module The plug-in module takes up two of the four mainframe slots. The optical channel provides calibrated measurement of optical waveforms in power units. Bandwidths are selectable on both channels to optimize sensitivity and bandwidth.
  • Page 21 NOTE If you wish to use the HP 83482A optical plug-in module in an HP 54750A digitizing oscil- loscope, a firmware upgrade must first be installed. Order the HP 83480K communica- tions firmware kit and follow the installation instructions.
  • Page 22 Channel Setup Menu The HP 83482A Optical/Electrical Plug-In Module Trigger The external trigger level range for this plug-in module is ±1 V. The trigger source selection follows the slots the plug-in module is installed in. For exam- ple, if the plug-in module is installed in slots 1 and 2, then the trigger source is listed as trigger 2.
  • Page 23 When you use improper cleaning and handling techniques, you risk expensive instrument repairs, damaged cables, and compromised measure- ments. Before you connect any fiber-optic cable to the HP 83482A optical/electrical plug-in module, “Cleaning Connections for Accurate Measurements” on page...
  • Page 24: Menu And Key Conventions

    Channel Setup Menu Menu and Key Conventions Menu and Key Conventions The keys labeled Trigger, Disk, and Run are all examples of front-panel keys. Pressing some front-panel keys accesses menus of functions that are dis- played along the right side of the display screen. These menus are called soft- key menus.
  • Page 25: Channel Setup Menu

    Channel Setup Menu Channel Setup Menu Channel Setup Menu This chapter describes the Channel Setup menu. A key tree and description of the available functions is included. C A U T I O N The input circuits can be damaged by electrostatic discharge (ESD). Therefore, avoid applying static discharges to the front-panel input connectors.
  • Page 26 Channel Setup Menu Channel Setup Menu Figure 2-1. Optical Channel Setup menu. 2-11...
  • Page 27 Channel Setup Menu Channel Setup Menu Figure 2-2. Electrical Channel Setup menu. 2-12...
  • Page 28: Displaying The Channel Setup Menus

    Channel Setup Menu Displaying the Channel Setup Menus Displaying the Channel Setup Menus To display the optical Channel Setup menu, press the optical Channel key located above the optical input connector. To display the electrical Channel Setup menu, press the electrical Channel key located above the electrical input connector.
  • Page 29 Channel Setup Menu Scale Scale The Scale softkey controls the vertical scaling of the waveform. If the fine mode is off, then the knob and arrow keys change the vertical scaling in a 1-2-5 sequence. When fine mode is on, the knob and arrow keys change the vertical scaling in 1 mV increments.
  • Page 30 Channel Setup Menu Bandwidth/Wavelength..Bandwidth/Wavelength..You can use the Bandwidth/Wavelength..softkey to change the bandwidth and wavelength settings. Bandwidth This function is available on the electrical channel only. You can use the Bandwidth function to select either the 18 GHz or 40 GHz bandwidth.
  • Page 31 Channel Setup Menu External scale..External scale..The External Scale function allows you to setup the analyzer to use external optical-to-electrical converters or attenuators. Scaling is automatically adjusted to account for the external device. Key Path Channel, External scale..Atten units The Atten Units function lets you select how you want the probe attenuation factor represented.
  • Page 32 Channel Setup Menu External scale..Units The Units function lets you select the unit of measure appended to the chan- nel scale, offset, trigger level, and vertical measurement values. For the optical channel these units are Volts or Watts. For the electrical channel the units are Volts, Amperes, Watts, or unknown.
  • Page 33 Channel Setup Menu Calibrate Calibrate The calibrate menu allows you to null out any skew between probes or cables, remove the effects of offsets in the internal O/E converter, recalibrate the responsivity of the O/E converter, and check the present calibration status of the analyzer.
  • Page 34 Channel Setup Menu Calibrate Cal status The Cal Status function displays a screen similar to Figure 2-3. Channel, Calibrate, Cal Status Key Path Figure 2-3. A typical Cal Status display. calsta85.tif This is the current date and time. You can compare this to the last plug-in Current Date module calibration time.
  • Page 35 Channel Setup Menu Calibrate The Plug-in function lists the model number, serial number, date, time, and Plug-in temperature delta. The temperature ∆ is the temperature change from the temperature of the mainframe when the last calibration was performed. If this temperature ∆...
  • Page 36: Calibration Overview

    Factory Calibrations 3-4 User Calibrations—Optical and Electrical 3-7 Complete Calibration Summary 3-19 Calibration Overview...
  • Page 37 Calibration Overview Calibration Overview Calibration Overview This chapter describes the calibration of the mainframe and the plug-in mod- ules. It is intended to give you, or the calibration laboratory personnel, an understanding of the various calibration procedures available, and how they were intended to be used.
  • Page 38 Calibration Overview Calibration Overview C A U T I O N The input circuits can be damaged by electrostatic discharge (ESD). Avoid applying static discharges to the front-panel input connectors. Before connecting a coaxial cable to the connectors, momentarily short the center and outer connectors of the cable together.
  • Page 39: Factory Calibrations

    Calibration Overview Factory Calibrations Factory Calibrations The following calibrations are performed at the factory: Mainframe Calibration O/E Factory Wavelength Calibration Table 3-1. Factory Calibration Summary Measurements Recommended Calibration What is calibrated Softkey Path Affected Interval Mainframe Accuracy and Channels affected: Annually at HP service Utility Calibration...
  • Page 40 Calibration Overview Factory Calibrations drawing that shows each switch’s function and protected position. Refer to the optional HP 83480A, 54750A Service Guide for more details about the main- frame calibration, and the position of the rear-panel memory protect switches. C A U T I O N To prevent access to the mainframe calibration switch, place a sticker over the access hole to this switch.
  • Page 41 Calibration Overview Factory Calibrations If the Current Frame ∆Temp listing is greater than ±5°C, then the main- frame should either be calibrated at the current operating temperature or be placed in an ambient air temperature that is within 5°C of the temperature of the current calibration.
  • Page 42: User Calibrations-Optical And Electrical

    Calibration Overview User Calibrations—Optical and Electrical User Calibrations—Optical and Electrical The following calibrations can be performed by the user: O/E User Wavelength Calibration Plug-in Module Vertical Calibration Offset Zero Calibration Dark Calibration Probe Calibration Channel Skew External Scale Electrical channels have calibration procedures for: •...
  • Page 43 Calibration Overview User Calibrations—Optical and Electrical Table 3-2. Optical and Electrical Channel User Calibration Summary Measurements Recommended Calibration What is calibrated Key Path Affected Interval O/E User Wavelength The photodetector Channels affected: Annual re-calibration Optical Channel Setup Calibration responsivity optical. All optical of user defined non- Calibrate channel...
  • Page 44 Calibration Overview User Calibrations—Optical and Electrical Table 3-3. Miscellaneous User Calibration Summary Measurements Recommended Calibration What is calibrated Key Path Affected Interval Probe calibration Probe Attenuation Channels affected: Whenever a probe is Electrical Channel Setup electrical. Any connected Calibrate electrical Calibrate probe measurement taken with the probe...
  • Page 45 Calibration Overview User Calibrations—Optical and Electrical NOTE The optical channel calibration accuracy is heavily dependent on the accuracy to which you know the optical source power. For best results, measure the optical source power with an optical power meter such as the HP 8153A and use precision optical connectors. In addition, proper connector cleaning procedures are essential to obtaining an accurate calibration.
  • Page 46 Calibration Overview User Calibrations—Optical and Electrical Plug-in Module Vertical Calibration The plug-in module vertical calibration is for both optical and electrical mea- surements. It allows the instrument to establish the calibration factors for a specific plug-in when the plug-in is installed in the mainframe. The plug-in cal- ibration factors are valid only for the specific mainframe slot in which it was calibrated.
  • Page 47 Calibration Overview User Calibrations—Optical and Electrical No additional equipment is required to perform a plug-in vertical calibration. Reference signals are both generated and routed internally, for the optical and electrical channels. If you are prompted to connect the calibrator output to the electrical channel during an optical vertical calibration, then the factory O/ E calibration has been lost.
  • Page 48 Calibration Overview User Calibrations—Optical and Electrical Figure 3-3. Offset Zero Calibration Dark Calibration The dark calibration is for optical measurements, or electrical measurements if an external O/E is being used. This calibration measures the optical channel offset signal when there isn’t any light present and then uses this information in performing extinction ratio measurements.
  • Page 49 Calibration Overview User Calibrations—Optical and Electrical To initiate a dark calibration 1 Press the Display key. Press the Color grade softkey, and set its setting to on. Color grade must be enabled to perform an extinction ratio measurement and a dark calibration. In addition, the dark level (amplitude when there is no signal present) must be on the screen to perform a dark calibration.
  • Page 50 Calibration Overview User Calibrations—Optical and Electrical Channel Skew Calibration This calibration affects both optical and electrical measurements. The skew calibration changes the horizontal position of a waveform on the display. The skew calibration has a range of approximately 100 µs. You can use skew to compensate for the differences in cable or probe lengths.
  • Page 51 Calibration Overview User Calibrations—Optical and Electrical The mainframe’s CAL signal is a voltage source, therefore you can let the instrument compensate for the actual characteristics of your probe by letting the instrument calibrate to the tip of the probe. The instrument automatically calibrates to the tip of the probe, sets the probe attenuation, and compensates for any probe offset.
  • Page 52 Calibration Overview User Calibrations—Optical and Electrical Figure 3-5. Electrical Channel Calibrate Menu To calibrate other devices The information in this section applies to both optical and electrical measure- ments. Since the mainframe’s CAL signal is a voltage source, it cannot be used to calibrate to the probe tip when the units are set to Ampere, Watt, or Unknown.
  • Page 53 Calibration Overview User Calibrations—Optical and Electrical External Scale Both optical and electrical channels have an External scale setting which allows the user to enter in an offset value to compensate for gains or losses not associated with the device under test. This feature is useful for adjusting out the effects of devices such as test fixtures and attenuators so that the reading on the display gives the measurement value associated with only the actual device under test.
  • Page 54: Complete Calibration Summary

    Calibration Overview Complete Calibration Summary Complete Calibration Summary Table 3-4. Complete Calibration Summary (1 of 3) Measurements Recommended Calibration What is calibrated Key Path Affected Interval Mainframe Calibration Accuracy and Channels affected: Annually at HP service Utility continuity of the optical &...
  • Page 55 Calibration Overview Complete Calibration Summary Table 3-4. Complete Calibration Summary (2 of 3) Measurements Recommended Calibration What is calibrated Key Path Affected Interval Offset Zero Calibration Vertical offset is Channels affected: Perform a plug-in Optical Channel Setup calibrated for the optical.
  • Page 56 Calibration Overview Complete Calibration Summary Table 3-4. Complete Calibration Summary (3 of 3) Measurements Recommended Calibration What is calibrated Key Path Affected Interval External Scale Compensates for gain Channels affected: Whenever using Channel Setup or loss associated optical & electrical. external devices External Scale with external devices...
  • Page 57 Calibration Overview Complete Calibration Summary 3-22...
  • Page 58 Specifications 4-3 Characteristics 4-7 Declaration of Conformity 4-9 Specifications and Regulatory Information...
  • Page 59 Specifications and Regulatory Information Specifications and Regulatory Information Specifications and Regulatory Information This chapter lists specifications and characteristics of the HP 83482A optical/ electrical plug-in module. Specifications apply over the temperature range +15°C to +35°C (unless otherwise noted) after the instrument’s temperature has been stabilized after 60 minutes of continuous operation.
  • Page 60 Specifications and Regulatory Information Specifications Specifications Table 4-1. HP 83482A Electical Channel Vertical Specifications Bandwidth (–3 dB) dc to 40 GHz, or dc to 18 GHz, user selectable dc Accuracy—single voltage marker ± 18 GHz 0.4% of full scale ±...
  • Page 61 Specifications and Regulatory Information Specifications Table 4-1. HP 83482A Electical Channel Vertical Specifications (Continued) Scale Factor (full scale is eight divisions) Minimum 1 mV/div Maximum 100 mV/div ± dc Offset Range 500 mV Inputs: ± Dynamic Range 400 mV relative to channel offset ±...
  • Page 62 Specifications and Regulatory Information Specifications Table 4-2. HP 83482A Optical Channel Vertical Specifications (Continued) µ Maximum W/div dc Offset Range +1 mW to –3 mW, referenced to two divisions above bottom of screen µ Connector Type 9/125 m single mode, user selectable connector .
  • Page 63: Specifications And Regulatory Information Specifications

    Specifications and Regulatory Information Specifications Table 4-5. Weight approximately 1.2 kg (2.6 lb.) Shipping approximately 2.1 kg (4.6 lb.)
  • Page 64: Characteristics

    Specifications and Regulatory Information Characteristics Characteristics The following characterisitcs are typical for the HP 83482A optical/electrical plug-in module. Refer to the HP 54701A Active Probe Service Guide for complete probe characteristics. Table 4-6. Trigger Input Characterisitcs for Electrical and Optical Channels Ω...
  • Page 65 The following figures show the characterisic impulse response of the HP 83482A optical/electrical plug-in module. The impulse response of the HP 83482A optical/electrical plug-in module displayed at 200 ps/division. The impulse response of the HP 83482A optical/electrical plug-in module displayed...
  • Page 66: Declaration Of Conformity

    Specifications and Regulatory Information Declaration of Conformity Declaration of Conformity...
  • Page 67 Specifications and Regulatory Information Declaration of Conformity 4-10...
  • Page 68: Reference

    In Case of Difficulty 5-2 Error Messages 5-5 Cleaning Connections for Accurate Measurements 5-7 Hewlett-Packard Sales and Service Offices 5-15 Reference...
  • Page 69: In Case Of Difficulty

    This section provides a list of suggestions for you to follow if the plug-in mod- ule fails to operate. A list of messages that may be display is also included. For complete service information, refer to the optional HP 83482A Optical/Elec- trical Plug-In Module Service Guide.
  • Page 70 Reference In Case of Difficulty If the plug-in does not operate 1 Make the following checks: • Is the plug-in module firmly seated in the mainframe slot? • Are the knurled screws at the bottom of the plug-in module finger-tight? •...
  • Page 71 In Case of Difficulty “~known” is still displayed, then the memory contents of the plug-in module are corrupt. Refer to the optional HP 83482A optical/electrical plug-in module Service Guide or contact a qualified service department. If all of the above steps check out okay, and the plug-in module still does not operate properly, then the problem is beyond the scope of this book.
  • Page 72: Error Messages

    If the suggestions do not eliminate the error message, then additional troubleshooting is required that is beyond the scope of this book. Refer to the optional HP 83482A Optical/Electrical Plug-In Module Service Guide and HP 83480A, 54750A Service Guide for additional troubleshooting information.
  • Page 73 3 Verify the knurled screws at the bottom of the plug-in module are finger tight. 4 The standard HP 54750A mainframe does not accept the HP 83482A optical/ electrical plug-in module. To use the module, a firmware upgrade must first be installed.
  • Page 74: Cleaning Connections For Accurate Measurements

    Reference Cleaning Connections for Accurate Measurements Cleaning Connections for Accurate Measurements Advances in measurement capabilities make connectors and connection tech- niques more important than ever. Damage to the connectors on calibration and verification devices, test ports, cables, and other devices can increase downtime and expense.
  • Page 75 Reference Cleaning Connections for Accurate Measurements Cleaning optical connectors Accurate and repeatable measurements require clean connections. Use the following guidelines to achieve the best possible performance when making measurements on a fiber-optic system: • Keep connectors covered when not in use. •...
  • Page 76 Reference Cleaning Connections for Accurate Measurements Table 5-1. Cleaning Accessories Item HP Part Number Isopropyl alcohol 8500-5344 Cotton swabs 8520-0023 Small foam swabs 9300-1223 Compressed dust remover (non-residue) 8500-5262 Table 5-2. Dust Caps Provided with Lightwave Instruments Item HP Part Number Laser shutter cap 08145-64521 FC/PC dust cap...
  • Page 77 Reference Cleaning Connections for Accurate Measurements Visual inspection of fiber ends Although it is not necessary, visual inspection of fiber ends can be helpful. Contamina- tion or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself.
  • Page 78 Reference Cleaning Connections for Accurate Measurements To clean a non-lensed connector C A U T I O N Do not use any type of foam swab to clean optical fiber ends. Foam swabs can leave filmy deposits on fiber ends that can degrade performance. 1 Apply isopropyl alcohol to a clean lint-free cotton swab or lens paper.
  • Page 79 Reference Cleaning Connections for Accurate Measurements To clean an adapter 1 Apply isopropyl alcohol to a clean foam swab. Cotton swabs can be used as long as no cotton fibers remain after cleaning. The foam swabs listed in this section’s introduction are small enough to fit into adapters.
  • Page 80 Reference Cleaning Connections for Accurate Measurements To test insertion loss and return loss To test insertion loss, use an appropriate lightwave source and a compatible lightwave receiver to test insertion loss. Examples of test equipment configu- rations include the following equipment: •...
  • Page 81 Reference Cleaning Connections for Accurate Measurements Cleaning electrical connections The following list includes the basic principles of microwave connector care. For more information on microwave connectors and connector care, consult the Hewlett-Packard Microwave Connector Care Manual, HP part number 08510-90064. Handling and Storage •...
  • Page 82: Hewlett-Packard Sales And Service Offices

    Reference Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices (1 of 2) U.S. FIELD OPERATIONS Headquarters California, Northern California, Southern Hewlett-Packard Company Hewlett-Packard Company Hewlett-Packard Company 19320 Pruneridge Avenue 301 East Evelyn 1421 South Manhatten Ave. Cupertino, CA 95014 U.S.A.
  • Page 83 Reference Hewlett-Packard Sales and Service Offices Hewlett-Packard Sales and Service Offices (2 of 2) INTERCON FIELD OPERATIONS Headquarters Australia Canada Hewlett-Packard Company Hewlett-Packard Australia Ltd. Hewlett-Packard Ltd. 3495 Deer Creek Rd. 31-41 Joseph Street 17500 South Service Road Palo Alto, California 94304-1316 Blackburn, Victoria 3130 Trans-Canada Highway (415) 857-5027...
  • Page 84 Index Channel autoscale softkey, 2-15 Channel key, 1-2, 2-10 accuracy performance, cleaning active probe, 2-14 adapters, 5-12 APC 2.4 (f-f) adapter, fiber-optic connections, 5-7, 5-11 APC 3.5 (f-f) adapter, non-lensed connectors, 5-11 Atten units softkey, 2-16 connector care, attenuation Current Date message, 2-19 range, 2-16...
  • Page 85 Index plug-in module vertical calibration, 3-11 power IEC Publication 1010, maximum input, 4, index-matching compounds, power level, 2-14 INPUT connector, 4, probe INPUTconnector, attenuation, 2-16, 2-20 inspecting attenuation factor, 2-16 cables, characteristics, 2-17 instrument, power, 2-14 installing the plug-in module, power connector, instrument, returning for service, probe calibration, 3-14,...
  • Page 86 Index troubleshooting, typeface conventions, Units softkey, 2-14, 2-17 user calibrations, vertical calibration, measurement, 2-17 scale, 2-13, 2-14, 2-15 waveform, 2-14 voltage measurement, 2-16 probe, 2-20 voltage probe calibration, 3-15 wattage measurement, 2-16 waveform display, 2-13 horizontal, 2-18 Wavelength key, 2-15 wavelength settings, 2-15 Index-3...
  • Page 87 Index Index-4...

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