Agilent 83434A Lightwave Receiver User’s Guide
© Copyright Agilent Technologies 2000 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under copyright laws. Agilent Part No. 83434-90005 Printed in USA February 2000 Agilent Technologies Lightwave Division 3910 Brickway BoulevardSanta Rosa, CA 95403, USA Notice. The information contained in this document is subject to change without notice. Companies, names, and data used in examples herein are fictitious unless otherwise noted.
General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publication 61010-1, Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use, and has been supplied in a safe condition. The instruction documentation contains information and warnings that must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
General Safety Considerations temperature of the product by 4°C for every 100 watts dissipated in the cabinet. If the total power dissipated in the cabinet is greater than 800 watts, then forced convection must be used. CAUTION Always use the three-prong ac power cord supplied with this instrument. Failure to ensure adequate earth grounding by not using this cord may cause instrument damage.
The Agilent 83434A—At a Glance The Agilent 83434A—At a Glance The Agilent 83434A 10 Gb/s lightwave receiver is designed to recover clock data and to provide linear, non-retimed data from digitally modulated SDH/ SONET STM-64/OC-192 optical signals, as well as signals employing forward error correction (FEC) at 10.664 Gb/s (option 106). The receiver is based on an amplified PIN receiver to produce a linear output with AGC stabilization.
Contents General Safety Considerations iii The Agilent 83434A—At a Glance v 1 Getting Started 2 Using the Agilent 83434A Front-Panel Features 2-2 Rear-Panel Features 2-3 Quick Confidence Check 2-4 Agilent 83434A Connection to a Bit-Error-Ratio Test Set 2-6 BER Performance Verification 2-9 3 Reference Accessories Supplied 3-2 Options 3-3 Replacement Parts 3-4 Front-Panel Fiber-Optic Adapters 3-5 Power Cords 3-7 Fiber-Optic Connectors 3-8 Instrument Service 3-18 4 Specifications and Regulatory Information Ag
Contents Contents-2
1 Step 1. Inspect the Shipment 1-3 Step 2. Check the Fuse 1-5 Step 3. Connect the Line-Power Cable 1-6 Step 4. Turn on the Agilent 83434A 1-8 Step 5. Avoid costly repairs 1-9 Step 6.
Getting Started Setting Up the Agilent 83434A Setting Up the Agilent 83434A This chapter shows you how to install your lightwave receiver. After you’ve completed this chapter, continue with Chapter 2, “Using the Agilent 83434A”. Refer to Chapter 3, “Reference” for the following additional information: • Tips on avoiding costly repairs by proper optical connection cleaning techniques. • Lists of available accessories and power cords.
Getting Started Setting Up the Agilent 83434A Step 1. Inspect the Shipment ❒ Inspect the shipping container for damage. ❒ Inspect the instrument. ❒ Verify that you received the accessories you ordered. Keep the shipping container and cushioning material until you have inspected the contents of the shipment for completeness and have checked the lightwave receiver mechanically and electrically. The lightwave receiver is packed within a carton.
Getting Started Setting Up the Agilent 83434A lent Technologies Sales Office. Keep the shipping materials for the carrier’s inspection. The Agilent Sales Office will arrange for repair or replacement at Agilent Technologies’ option without waiting for claim settlement. Serial numbers Agilent Technologies makes frequent improvements to its products to enhance their performance, usability, or reliability, and to control costs.
Getting Started Setting Up the Agilent 83434A Step 2. Check the Fuse 1 Locate the line-input connector on the instrument’s rear panel. 2 Disconnect the line-power cable if it is connected. 3 Use a small flat-blade screwdriver to pry open the fuse holder door. 4 The fuse is housed in a small container. Insert the tip of a screwdriver on the side of the container and gently pull outward to remove the container. A spare fuse is stored below the line fuse.
Getting Started Setting Up the Agilent 83434A Step 3. Connect the Line-Power Cable CAUTION Always use the three-prong AC power cord supplied with this instrument. Failure to ensure adequate earth grounding by not using this cord may cause instrument damage. CAUTION Do not connect ac power until you have verified the line voltage is correct as described in the following paragraphs. Damage to the equipment could result. CAUTION This instrument has autoranging line voltage input.
Getting Started Setting Up the Agilent 83434A 1 Verify that the line power meets the requirements shown in the following table. Line Power Requirements Power 115 VAC: 50 Watts MAX 230 VAC: 50 Watts MAX Voltage nominal: 115 VAC range:90–132 V nominal:230 VACrange:98–254 V Frequency nominal:50 Hz/60 Hzrange:47–63 Hz 2 Connect the line-power cord to the rear-panel connector of the instrument. 3 Connect the other end of the line-power cord to the power receptacle.
Getting Started Setting Up the Agilent 83434A Step 4. Turn on the Agilent 83434A With the power cable inserted into the line module, turn the lightwave receiver on by pressing the line switch. The green light-emitting diode (LED) should light. NOTE The front panel LINE switch disconnects the mains circuits from the mains supply after the EMC filters and before other parts of the instrument.
Getting Started Setting Up the Agilent 83434A Step 5. Avoid costly repairs CAUTION Fiber-optic connectors are easily damaged when connected to dirty or damaged cables and accessories. The front-panel connectors of the Agilent 83434A are no exception. When you use improper cleaning and handling techniques, you risk expensive instrument repairs, damaged cables, and compromised measurements. Before you connect any fiber-optic cable to the Agilent 83434A, refer to “Fiber-Optic Connectors” on page 3-8.
Getting Started Setting Up the Agilent 83434A Step 6. Learn more about our products To learn more about Agilent Technologies products, visit our website at http://www.agilent.com. If you wish to find out more about your new lightwave receiver, use the keyword “83434A” in your search.
2 Front-Panel Features 2-2 Rear-Panel Features 2-3 Quick Confidence Check 2-4 Agilent 83434A Connection to a Bit-Error-Ratio Test Set BER Performance Verification 2-9 Using the Agilent 83434A 2-6
Using the Agilent 83434A Front-Panel Features Front-Panel Features Figure 2-1. The Agilent 83434A front panel. CLOCK OUT Output is nominally 9.95328 GHz or 10.66423 GHz (option 106). DATA OUT Provides an amplified, non-retimed signal corresponding to the incoming data stream. OPTICAL IN Maximum signal input is 0 dBm, damage level input is +7 dBm. This input accepts any of the Agilent 81000-series connector interface adapters. INPUT PRESENT Indicates the presence of sufficient optical power.
Using the Agilent 83434A Rear-Panel Features Rear-Panel Features Figure 2-2. The Agilent 83434A rear panel.
Using the Agilent 83434A Quick Confidence Check Quick Confidence Check This procedure verifies the basic functionality of the lightwave receiver. The following equipment is used: • • • • • Agilent 83434A lightwave receiver Pattern generator Clock source Optical oscilloscope Optical source Note Before starting be sure to clean all connectors and optical interfaces using the procedures describe in “Fiber-Optic Connectors” on page 3-8. 1 Turn on the Agilent 83434A and let it warm up for 30 minutes.
Using the Agilent 83434A Quick Confidence Check If the verification check fails If the lightwave receiver does not pass the verification check, you should review the procedure being performed when the problem occurred. A few minutes spent performing some simple checks may save waiting for your instrument to be repaired.
Using the Agilent 83434A Agilent 83434A Connection to a Bit-Error-Ratio Test Set Agilent 83434A Connection to a Bit-Error-Ratio Test Set The following procedure describes how to connect the lightwave receiver to a bit-error-ratio test set (BERT). Refer to Figure 2-3 on page 2-7. Note Before starting, be sure to clean all connectors and optical interfaces using the procedures describe in“Fiber-Optic Connectors” on page 3-8.
Using the Agilent 83434A Agilent 83434A Connection to a Bit-Error-Ratio Test Set Figure 2-3. Connecting the Agilent 83434A to a bit-error-ratio test system. 1 Turn the lightwave receiver on. Let it warm up for 30 minutes. 2 Turn on the BERT and the laser and let them warm up according to their specifications. 3 Perform any calibrations indicated in the documentation for the BERT. 4 Connect a cable from the CLOCK OUT connector on the lightwave receiver to the clock input connector of the BERT.
Using the Agilent 83434A Agilent 83434A Connection to a Bit-Error-Ratio Test Set 9 Connect the laser source to the fiber optic cable.
Using the Agilent 83434A BER Performance Verification BER Performance Verification This procedure verifies BER performance of the of the Agilent 83434A lightwave receiver with the Agilent 83433A and 71612B.
Using the Agilent 83434A BER Performance Verification 1 Connect the equipment as shown in Figure 2-4. Figure 2-4.
Using the Agilent 83434A BER Performance Verification 2 Set the Agilent 71612B as follows: CLOCK OUTPUT SIG GEN FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9953.28 MHZ SIG GEN FREQ (for 83434 option 106) . . . . . . . . . . . . . . . . . . . . . . . . 10664.23 MHZ MENU DATA OUTPUT Ext AC COUPLED DATA AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 V PATTERN PRBS 2 31–1 3 Disable WAVELENGTH ADJUST on the 83433A.
Using the Agilent 83434A BER Performance Verification 2-12
3 Accessories Supplied 3-2 Options 3-3 Replacement Parts 3-4 Front-Panel Fiber-Optic Adapters 3-5 Power Cords 3-7 Fiber-Optic Connectors 3-8 Choosing the Right Connector 3-8 Inspecting Connectors 3-11 Cleaning Connectors 3-15 Instrument Service 3-18 Preparing the Instrument for Shipping 3-19 Agilent TechnologiesService Offices 3-21 Reference
Reference Accessories Supplied Accessories Supplied The Agilent 83434A lightwave receiver is shipped with: • FC/PC connector interface on the optical input of the lightwave receiver unless a different option was ordered. Refer to “Agilent 83434A Options” on page 3-3 for a complete list of the available connector interfaces. • Agilent 83434A Lightwave Receiver User’s Guide, Agilent part number 83434-90005.
Reference Options Options Table 3-1. Agilent 83434A Options Option Description Option 011 Diamond (HMS-10) connector interface on the optical input of the lightwave receiver Option 013 DIN connector interface on the optical input of the lightwave receiver Option 014 ST connector interface on the optical input of the lightwave receiver Option 017 SC connector interface on the optical input of the lightwave receiver Option 106 For FEC signals, substitutes clock recovery at 10.
Reference Replacement Parts Replacement Parts Table 3-2. Replacement Parts Description Agilent Part Number APC 3.5 F-to-F (connector saver) 5061-5311 APC 3.
Reference Front-Panel Fiber-Optic Adapters Front-Panel Fiber-Optic Adapters Table 3-3.
Reference Front-Panel Fiber-Optic Adapters Table 3-3. Front Panel Fiber-Optic Adaptes (2 of 2) Front Panel Fiber-Optic Adapter Description Agilent Part Number ST connector 1005-0596 SC connector 1005-0597 a. The FC/PC adapter is the standard adapter supplied with the instrument.
Reference Power Cords Power Cords Plug Type Cable Part No.
Reference Fiber-Optic Connectors Fiber-Optic Connectors Today, advances in measurement capabilities make connectors and connection techniques more important than ever. Damage to the connectors on calibration and verification devices, test ports, cables, and other devices can degrade measurement accuracy and damage instruments. Replacing a damaged connector can cost thousands of dollars, not to mention lost time! This expense can be avoided by observing the simple precautions presented in this book.
Reference Fiber-Optic Connectors tions take repeatability uncertainty into account? • Will a connector degrade the return loss too much, or will a fusion splice be required? For example, many DFB lasers cannot operate with reflections from connectors. Often as much as 90 dB isolation is needed. Figure 3-1. Basic components of a connector. Over the last few years, the FC/PC style connector has emerged as the most popular connector for fiber-optic applications.
Reference Fiber-Optic Connectors Figure 3-2. Universal adapters to Diamond HMS-10. The HMS-10 encases the fiber within a soft nickel silver (Cu/Ni/Zn) center which is surrounded by a tough tungsten carbide casing, as shown in Figure 3-3. Figure 3-3. Cross-section of the Diamond HMS-10 connector. The nickel silver allows an active centering process that permits the glass fiber to be moved to the desired position.
Reference Fiber-Optic Connectors The soft core, while allowing precise centering, is also the chief liability of the connector. The soft material is easily damaged. Care must be taken to minimize excessive scratching and wear. While minor wear is not a problem if the glass face is not affected, scratches or grit can cause the glass fiber to move out of alignment. Also, if unkeyed connectors are used, the nickel silver can be pushed onto the glass surface.
Reference Fiber-Optic Connectors Use the following guidelines to achieve the best possible performance when making measurements on a fiber-optic system: • Never use metal or sharp objects to clean a connector and never scrape the connector. • Avoid matching gel and oils. Figure 3-4. Clean, problem-free fiber end and ferrule. Figure 3-5. Dirty fiber end and ferrule from poor cleaning.
Reference Fiber-Optic Connectors Figure 3-6. Damage from improper cleaning. While these often work well on first insertion, they are great dirt magnets. The oil or gel grabs and holds grit that is then ground into the end of the fiber. Also, some early gels were designed for use with the FC, non-contacting connectors, using small glass spheres. When used with contacting connectors, these glass balls can scratch and pit the fiber.
Reference Fiber-Optic Connectors • Keep connectors covered when not in use. • Use fusion splices on the more permanent critical nodes. Choose the best connector possible. Replace connecting cables regularly. Frequently measure the return loss of the connector to check for degradation, and clean every connector, every time. All connectors should be treated like the high-quality lens of a good camera. The weak link in instrument and system reliability is often the inappropriate use and care of the connector.
Reference Fiber-Optic Connectors Visual inspection of fiber ends Visual inspection of fiber ends can be helpful. Contamination or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself. Use a microscope (100X to 200X magnification) to inspect the entire end face for contamination, raised metal, or dents in the metal as well as any other imperfections. Inspect the fiber for cracks and chips.
Reference Fiber-Optic Connectors Table 3-5. Dust Caps Provided with Lightwave Instruments Item Agilent Part Number Laser shutter cap 08145-64521 FC/PC dust cap 08154-44102 Biconic dust cap 08154-44105 DIN dust cap 5040-9364 HMS10/dust cap 5040-9361 ST dust cap 5040-9366 To clean a non-lensed connector CAUTION 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.
Reference Fiber-Optic Connectors CAUTION Do not shake, tip, or invert compressed air canisters, because this releases particles in the can into the air. Refer to instructions provided on the compressed air canister. 7 As soon as the connector is dry, connect or cover it for later use. If the performance, after the initial cleaning, seems poor try cleaning the connector again. Often a second cleaning will restore proper performance. The second cleaning should be more arduous with a scrubbing action.
Reference Instrument Service Instrument Service Before returning your instrument for servicing, you may want to refer to the Agilent website, www.agilent.com (quick search “83434A”). It contains application notes and frequently asked questions (FAQ) specific to the 83434A that may answer many of your questions. If you continue to experience difficulties, please call the Agilent Technologies Instrument Support Center to initiate service before returning your instrument to a service office.
Reference Instrument 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. • Type of service required. • Date instrument was returned for repair. • Description of the problem: • Whether problem is constant or intermittent. • Whether instrument is temperature-sensitive.
Reference Instrument Service rugated cardboard carton of 159 kg (350 lb) test strength. • The carton must be large enough to allow approximately 7 cm (3 inches) on all sides of the instrument for packing material, and strong enough to accommodate the weight of the instrument. • Surround the equipment with approximately 7 cm (3 inches) of packing material, to protect the instrument and prevent it from moving in the carton. If packing foam is not available, the best alternative is S.
Reference Instrument Service Agilent TechnologiesService Offices Before returning an instrument for service, call the Agilent Technologies Instrument Support Center at 1 (800) 403-0801. If you continue to experience difficulties, please call one of the numbers listed below. Agilent Technologies Service Numbers (1 of 2) Austria 01/25125-7171 Belgium 32-2-778.37.
Reference Instrument Service Agilent Technologies Service Numbers (2 of 2) Sweden 08-5064 8700 Switzerland (01) 735 7200 Taiwan (886 2) 2-712-0404 United Kingdom 01 344 366666 United States and Canada (800) 403-0801 3-22
4 Agilent 83434A Specifications and Characteristics Regulatory Information 4-6 Declaration of Conformity 4-7 4-3 Specifications and Regulatory Information
Specifications and Regulatory Information Specifications and Regulatory Information Specifications and Regulatory Information This chapter lists specification and characteristics of the instrument. The distinction between these terms is described as follows: • Specifications describe warranted performance over the temperature range 0°C to +45°C and relative humidity <95% non-condensing (unless otherwise noted).
Specifications and Regulatory Information Agilent 83434A Specifications and Characteristics Agilent 83434A Specifications and Characteristics OPERATING SPECIFICATIONS Optical Input Wavelength 1300 to 1600 nm a,b,c,d Optical input power –16 to 0 dBm Return loss 28 dB minimum “Loss of optical input” alarm threshold –25 to –20 dBm Maximum Safe Input Level Optical input powere +7 dBm maximum Data Output Amplitudef,g 0.5 to 1.5 V pk-pk Lower 3 dB frequencyh 0.10 MHz Upper 3 dB frequencyh, i 6.
Specifications and Regulatory Information Agilent 83434A Specifications and Characteristics Recovered Clock Output Amplitudeh 0.5 to 1. 5 V pk-pk Frequencyk 9953.26 to 9953.30 MHz; 9953.28 nominal Frequency (opt. 106) 10664.03 to 10664.43 MHz; 10664.23 nominal Duty cycle 45/55% maximum; 50/50% nominal Clock to data alignmentl k ±25.
Specifications and Regulatory Information Agilent 83434A Specifications and Characteristics l. Falling clock edge to data transition measured with 2 31–1 PRBS. m. Integrated phase noise measurement method. n. 9,940 to 9,960 MHz standard, 10624 to 10684 MHz (option 106). o. Standard instrument has FC/PC adapters. Other adapters available as options.
Specifications and Regulatory Information Regulatory Information Regulatory Information This product is designed for use in INSTALLATION CATEGORY II and POLLUTION DEGREE 2, per IEC 61010-1 and 664 respectively. Notice for Germany: Noise Declaration This is to declare that this instrument is in conformance with the German Regulation on Noise Declaration for Machines (Laermangabe nach der Maschinenlaermrerordnung –3.GSGV Deutschland).
Specifications and Regulatory Information Regulatory Information Declaration of Conformity 4-7
Specifications and Regulatory Information Regulatory Information 4-8
Index A ac power cables, 1-7 accessories, 3-2 adapters fiber optic, 3-5 Agilent sales and service offices, 3-21 B BER performance verifying, 2-9 bit-error-ratio test set, 2-6 C cabinet, cleaning, i-iii calibration cycle, 4-2 care of cabinet, i-iii care of fiber optics, 1-9 characteristics, 4-3 checking the fuse, 1-5 classification product, i-iii cleaning adapters, 3-17 cabinet, i-iii fiber-optic connections, 3-8, 3-16 non-lensed connectors, 3-16 clock out connector, 2-2 compressed dust remover, 3-15 conn
Index power cable requirements, 1-6 R rear panel features, 2-3 regulatory duration, 4-2 information, 4-6 repair options, 2-5 replacement, 3-4 replacement parts, 3-4 returning for service, 3-18 S safety, i-iii laser classification, i-iii line fuse, i-iii, 1-5 sales and service offices, 3-21 serial numbers, 1-4 service, 3-18 options, 2-5 returning for, 3-18 shipping procedure, 3-19 spare fuse, 1-5 specifications, 4-3 definition of terms, 4-2 swabs, 3-15 T turning on the lightwave receiver, 1-8 V verifica
