Agilent Technologies 11896A User's And Service Manual
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Agilent Technologies 11896A User's And Service Manual

Polarization controller
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Agilent Technologies 11896A User's And Service Manual

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  • Page 1 (217) 352-9330 | Click HERE Find the Keysight / Agilent 11896A at our website:...
  • Page 2 User, Programming and Service Guide Agilent 11896A Polarization Controller...
  • Page 3 The information contained in this document is subject to change without Notice notice. Agilent Technologies makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and tness for a particular purpose. Agilent Technologies...
  • Page 4 Certi cation Agilent Technologies certi es that this product met its published speci cations at the time of shipment from the factory. Agilent Technologies further certi es that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute's calibration facility, and to the calibration facilities of other International Standards Organization members.
  • Page 5 This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Agilent Technologies will, at its option, either repair or replace products which prove to be defective.
  • Page 6 Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact your nearest Agilent Technologies Service Oce.
  • Page 7 Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. The caution sign denotes a hazard to the instrument. It calls attention to a C A U T I O N procedure which, if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
  • Page 8 General Safety Considerations Before this instrument is switched on , make sure it has been properly W A R N I N G grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact. Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal can result in personal injury.
  • Page 9 How to Use This Manual This manual provides information about the Agilent 11896A polarization controller. Chapter 1 provides general information and speci cations for the controller Chapter 2 describes how to prepare the polarization controller for use and how to make ber optic connections...

  • Page 10: Table Of Contents

    Power cable ....Turning on the Agilent 11896A ... . Lightwave Connector Care ....
  • Page 11 Return loss ....2-18 3. Using the Agilent 11896A Polarization Controller Front-Panel Features ....
  • Page 12 Program header options ....4-11 Program data syntax rules ....4-12 Numeric program data ....4-12 Program message terminator .
  • Page 13 ... . Verifying the Agilent 11896A Speci cations ..Insertion loss ....
  • Page 14 Regular orders ....5-20 Hotline orders ....5-20 A.
  • Page 15 5-1. Agilent 11896A assembly level replaceable parts..5-21 B-1. Block diagram for testing the extinction ratio of the Agilent 11896A......Contents-6...
  • Page 16 2-1. Accessories Supplied with the Agilent 11896A ..2-2. Agilent 11896A Power Requirements ... 2-3. AC Power Cables Available ....
  • Page 17 Contents...

  • Page 18: General Information

    General Information...
  • Page 19 General Information What you'll nd in this chapter A description of the Agilent 11896A polarization controller. A list of options and accessories available. Agilent 11896A polarization controller speci cations and characteristics. Information about the controller's serial number label. Information about avoiding damage to the controller from electrostatic discharge.
  • Page 20 A typical application con guration using the polarization controller is shown in Figure 1-1. Figure 1-1. Typical application setup using the Agilent 11896A polarization controller.

  • Page 21: Instrument Con Guration

    General Information Description Instrument con guration The standard Agilent 11896A polarization controller includes: FC/PC front-panel connector interfaces Agilent 11896A User, Programming, and Service Guide The following options are available: Options Option Description Option 010 Deletes FC/PC front-panel connector interfaces. Option 025 One meter pigtail ber with FC/PC connector interfaces.

  • Page 22: Polarization-Dependent Loss Measurements

    Agilent 71450A or Agilent 71451A optical spectrum analyzer and the Agilent 8509A/B lightwave polarization analyzer. Figure 1-2 shows how to con gure the Agilent 11896A polarization controller Power meter PDL and the Agilent 8153A optical power meter for performing automatic measurement system single-wavelength PDL measurements.

  • Page 23: Setup For Swept-Wavelength Pdl Measurements Using An Optical Spectrum Analyzer

    General Information Description Figure 1-3 shows how to con gure the Agilent 11896A polarization controller Swept-wavelength PDL and the Agilent 71451A optical spectrum analyzer for performing automatic measurement system swept-wavelength PDL measurements. Figure SWPTWAVE here. Figure 1-3. Setup for swept-wavelength PDL measurements using an optical spectrum analyzer.
  • Page 24 General Information Description An example of swept-wavelength PDL test data, showing the amount of PDL simultaneously observed over a broad wavelength spectrum, is shown in Figure 1-4. Figure 1-4. Example of swept-wavelength PDL test data.

  • Page 25: Max/Min Pdl Measurement System

    General Information Description Figure 1-5 shows how to setup the Agilent 11896A polarization controller and Max/min PDL the Agilent 8509A/B lightwave polarization analyzer for performing automatic measurement system single-wavelength max/min PDL measurements. Figure 1-5. Setup for single-wavelength max/min PDL measurements.
  • Page 26 General Information Description An example of max/min PDL measurement data is shown in Figure 1-6. The states of polarization are displayed as Stokes parameters and PDL markers on the Poincare sphere at the points where maximum and minimum power values actually occur during the measurement. Figure 1-6.

  • Page 27: Theory Of Operation

    Theory of Operation Figure 1-7. Agilent 11896A polarization controller block diagram. The transmitted signal enters the polarization controller and passes through the internal four- ber-loop assembly. The dimensions of each loop are optimized to approximate a quarter-wave retarder response over the polarization controller's speci ed wavelength range.

  • Page 28: Speci Cations And Characteristics

    Speci cations and Characteristics This section contains speci cations and characteristics for the Agilent 11896A polarization controller. The speci cations in this chapter apply over the temperature range 0 C to +55 C (unless otherwise noted). All speci cations apply after the instrument's temperature has been stabilized after 1 hour continuous operation and self-calibration routines have been run.

  • Page 29: Performance Speci Cations

    Physical Speci cations Weight Dimensions Also applies to Option 010 when using FC/PC connectors. Characteristic, non-warranted performance. When the Agilent 11896A is spliced into the measurement system. Extinction ratio refers only to the polarized portion of the optical signal. Any position. 1-12...
  • Page 30 General Information Speci cations and Characteristics 1-13...

  • Page 31: Serial Numbers

    Serial Numbers Agilent Technologies makes frequent improvements to its products to enhance their performance, usability, or reliability, and to control costs. Agilent Technologies service personnel have access to complete records of design changes to each type of equipment, based on the equipment's serial number.

  • Page 32: Electrostatic Discharge Information

    Electrostatic Discharge Information Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. Figure 1-8 shows an example of a static-safe work station using two types of ESD protection: Conductive table-mat and wrist-strap combination.
  • Page 33 General Information Electrostatic Discharge Information Figure 1-8. Example of a static-safe work station. 1-16...

  • Page 34: Reducing Esd Damage

    General Information Reducing ESD damage The following suggestions may help reduce ESD damage that occurs during testing and servicing operations. Before connecting any coaxial cable to an instrument connector for the rst time each day, momentarily ground the center and outer conductors of the cable.
  • Page 35 General Information...

  • Page 36: Installation And Preparation For Use

    Installation and Preparation for Use...
  • Page 37 Installation and Preparation for Use What you'll nd in this chapter Preparing the polarization controller for use. Turning on the controller. Making ber optic connections.

  • Page 38: Preparing The Polarization Controller For Use

    If the shipping materials are in good condition, retain them for possible future use. You may wish to ship the polarization controller to another location or return it to Agilent Technologies for service. Refer to \How to Return the Agilent 11896A for Service" in Chapter 5.

  • Page 39: Connecting The Agilent 11896A To A Power Source

    Installation and Preparation for Use Preparing the Polarization Controller for Use Connecting the Agilent 11896A to a power source The polarization controller is a portable instrument and requires no physical installation other than connection to a power source. Do not connect ac power until you have veri ed that the line voltage is C A U T I O N correct and the proper fuse is installed.

  • Page 40: Power Cable

    Installation and Preparation for Use Preparing the Polarization Controller for Use Figure 2-1. Checking the fuse. Power cable The polarization controller is equipped with a three-wire power cable, in accordance with international safety standards. When connected to an appropriate power line outlet, this cable grounds the instrument cabinet.
  • Page 41 Installation and Preparation for Use Preparing the Polarization Controller for Use Failure to ground the polarization controller properly can result in W A R N I N G personal injury. Before turning on the polarization controller, you must connect its protective earth terminals to the protective conductor of the main power cable.
  • Page 42 Installation and Preparation for Use Preparing the Polarization Controller for Use Table 2-3. AC Power Cables Available...

  • Page 43: Turning On The Agilent 11896A

    Turning on the Agilent 11896A With the power cable inserted into the line module, turn the polarization controller on by rocking the front-panel switch to the \1" position. After a moment, numerals appear on the front-panel LCD. If the LCD fails to light,...

  • Page 44: Lightwave Connector Care

    Lightwave Connector Care Introduction Lightwave cable interfaces can be damaged by improper cleaning and connection procedures. Dirty or damaged lightwave interfaces can result in nonrepeatable or inaccurate measurements. This section will suggest some best practices to clean, care for, connect, and inspect lightwave connectors. Lightwave connectors are used to connect two ber ends together.
  • Page 45 Installation and Preparation for Use Lightwave Connector Care Return loss is another important factor. It is a measure of re ection: the less re ection the better (the larger the return loss, the smaller the re ection). The best physically contacting connectors have return losses better than 40 dB, although 20 to 30 dB is more common.

  • Page 46: Cleaning And Handling

    The third process describes how to care for lensed lightwave connections. Agilent Technologies strongly recommends that index matching compounds C A U T I O N NOT be applied to their Instruments and accessories. Some compounds, such as gels, may be dicult to remove and can contain damaging particulates.

  • Page 47: Cleaning Non-Lensed Lightwave Connectors

    : : : : : : : : : : : : : : : : : : : : : : : : : : : : Agilent Technologies recommends that you do not use any type of foam swab C A U T I O N to clean optical ber ends.

  • Page 48: Cleaning Lightwave Adapters

    Installation and Preparation for Use Lightwave Connector Care Cleaning lightwave adapters All of the items listed above for cleaning connectors may be used to clean Equipment lightwave adapters. In addition, small foam swabs may be used along with isopropyl alcohol and compressed air to clean the inside of lightwave connector adapters.

  • Page 49: Storage

    Lightwave Connector Care Storage All of Agilent Technologies' lightwave instruments are shipped with either laser shutter caps or dust caps on the lightwave adapters that come with the instrument. Also, all of the cables that are shipped have covers to protect the cable ends from damage or contamination.

  • Page 50: Making Connections

    Installation and Preparation for Use Lightwave Connector Care Making connections Proper connection technique requires attention to connector compatibility, insertion technique and torque requirements. Connectors must be the same connector type in order to ensure mechanical and optical compatibility. Attempting to connect incompatible connector types may prevent the connection from functioning properly and even cause damage to the ber surfaces.

  • Page 51: Summary

    Installation and Preparation for Use Lightwave Connector Care Summary When making measurements with lightwave instruments or accessories, the following precautions will help to insure good, reliable, repeatable measurements: Con rm connector type compatibility. Use extreme care in handling all lightwave cables and connectors. Be sure the connector interfaces are clean before making any connections.

  • Page 52: Optical Performance Testing

    Installation and Preparation for Use Lightwave Connector Care Optical performance testing Consistent measurements with your lightwave equipment are a good Introduction indication that you have good connections. However, you may wish to know the insertion loss and/or return loss of your lightwave cables or accessories. If you test your cables and accessories for insertion loss and return loss upon receipt, and retain the measured data for comparison, you will be able to tell in the future if any degradation has occurred.

  • Page 53: Return Loss

    Installation and Preparation for Use Return loss can be tested using a number of di erent test equipment Return loss con gurations. Some of these are: an Agilent 8703 lightwave component analyzer an Agilent 8702 analyzer with the appropriate source, receiver and lightwave coupler an Agilent 8504 precision re ectometer an Agilent 8153 lightwave multimeter with an Agilent 81543 return loss...

  • Page 54: Using The Agilent 11896A Polarization Controller

    Using the Agilent 11896A Polarization Controller...
  • Page 55 Using the Agilent 11896A Polarization Controller What you'll nd in this chapter Agilent 11896A series front-panel features. Agilent 11896A series rear-panel features. Instructions for manually operating the polarization controller.

  • Page 56: Front-Panel Features

    Front-Panel Features The front panel of the polarization controller includes three main sections: Polarization adjustment Instrument state Data entry...
  • Page 57 The right-most knob is also used to adjust the scan rate, the SAVE and RECALL register numbers, and the GPIB address when using the front-panel function keys. The Agilent 11896A front panel. Display screen. Used to display paddle positions and instrument settings.

  • Page 58: Error Codes

    Using the Agilent 11896A Polarization Controller Front-Panel Features The controller has six error codes that can appear on the front panel twelve Error codes digit 7-segment LED display: Error Message Type of Error MOTOR ERROR Error parking the motor. Indicates a stuck paddle, faulty motor and so forth.

  • Page 59: Rear-Panel Features

    Rear-Panel Features The Agilent 11896A rear panel. Power input GPIB connector...

  • Page 60: Using The Agilent 11896A

    Using the Agilent 11896A Precise manual adjustment of the four paddles in the polarization controller can be made using the front-panel knobs while watching the display. Each paddle can rotate 180 in 1000 discrete steps of 0.18 each. The three-segment display shows the relative step count, where zero corresponds...

  • Page 61: Power-Up Function

    Using the Agilent 11896A Polarization Controller Using the Agilent 11896A Power-up function The power switch is located in the lower left-hand corner of the front panel. Turn the polarization controller on by setting the switch to the \1" position. When the polarization controller is turned on: All display segments are lit for approximately one second.

  • Page 62: To Continuously Sweep All Polarization States

    Using the Agilent 11896A Polarization Controller Using the Agilent 11896A To continuously sweep all polarization states To continuously and randomly sweep all polarization states, press AUTOSCAN The scan time clock is reset to 00:00. This indicates the present scan time has been active 0 minutes, 0 seconds.

  • Page 63: To Save An Instrument State

    Using the Agilent 11896A Polarization Controller Using the Agilent 11896A To save an instrument state To save the instrument state, press SAVE The number of the last Save register used is displayed. Use the right-most knob to select the desired register (1{9).

  • Page 64: To Use The Local Function

    Using the Agilent 11896A Polarization Controller Using the Agilent 11896A To use the Local function When the polarization controller is under remote GPIB control, enable local control by pressing LOCAL To display or change the GPIB address To display or change the GPIB address, press LOCAL The current GPIB address is displayed.
  • Page 65 Using the Agilent 11896A Polarization Controller Using the Agilent 11896A...

  • Page 66: Programming

    Programming...
  • Page 67 Programming What you'll nd in this section This section introduces the basics for remote programming of a polarization controller. The programming instructions in this manual conform to the IEEE 488.2 Standard Digital Interface for Programmable Instrumentation. The programming instructions provide the means of remote control. You can perform the following basic operations with a computer and a polarization controller: Set up the instrument.

  • Page 68: Changing The Gpib Address

    Programming Using the Agilent 11896A Changing the GPIB address The polarization controller's default (factory set) primary address is 20. N O T E The programming examples for individual commands in this manual are written in HP BASIC 5.0 for an...

  • Page 69: Talking To The Instrument

    Talking to the Instrument Computers acting as controllers communicate with the instrument by sending and receiving messages over a remote interface. Instructions for programming normally appear as ASCII character strings embedded inside the output statements of a \host" language available on your controller. The input statements of the host language are used to read in responses from the polarization controller.

  • Page 70: Program Message Syntax

    Program Message Syntax To program the instrument remotely, you must have an understanding of the command format and structure expected by the instrument. The IEEE 488.2 syntax rules govern how individual elements such as headers, separators, program data, and terminators may be grouped together to form complete instructions.

  • Page 71: Instructions

    Programming Program Message Syntax Instructions Instructions (both commands and queries) normally appear as a string embedded in a statement of your host language, such as BASIC, Pascal, or C. Instructions are composed of two main parts: The header, which speci es the command or query to be sent. The program data, which provide additional information needed to clarify the meaning of the instruction.

  • Page 72: Program Data

    Programming Program Message Syntax Program data Program data are used to clarify the meaning of the command or query. They provide necessary information, such as whether a function should be on or o . Each instruction's syntax de nition shows the program data, as well as the values they accept.

  • Page 73: Compound Command Header

    Programming Program Message Syntax Compound command headers are a combination of two program mnemonics. Compound command The rst mnemonic selects the subsystem, and the second mnemonic selects header the function within that subsystem. The mnemonics within the compound message are separated by colons. For example: To execute a single function within a subsystem: :<subsystem>:<function><separator><program data><terminator>...

  • Page 74: Duplicate Mnemonics

    Programming Program Message Syntax Duplicate mnemonics Identical function mnemonics can be used for more than one subsystem. For example, the function mnemonic STATus may be used to set bits in either the status operation register or the status questionable register. To set the lower four bits of the enable register for the status operation register (the enable register is a bit mask for the status operation register), use:...

  • Page 75: Query Command

    Programming Program Message Syntax Query command Command headers immediately followed by a question mark (?) are queries. After receiving a query, the instrument interrogates the requested function and places the answer in its output queue. The answer remains in the output queue until it is read or another command is issued.

  • Page 76: Program Header Options

    Programming Program Message Syntax Program header options Program headers can be sent using any combination of uppercase or lowercase ASCII characters. Instrument responses, however, are always returned in uppercase. Program command and query headers may be sent in either long form (complete spelling), short form (abbreviated spelling), or any combination of long form and short form.

  • Page 77: Program Data Syntax Rules

    Programming Program Message Syntax Program data syntax rules Program data is used to convey a variety of types of parameter information related to the command header. At least one space must separate the command header or query header from the program data. <program mnemonic><separator><data><terminator>...

  • Page 78: Program Message Terminator

    Programming Program Message Syntax Program message terminator The program instructions within a data message are executed after the program message terminator is received. The terminator may be either an NL (New Line) character, an EOI (End-Or-Identify) asserted in the GPIB interface, or a combination of the two.

  • Page 79: Initialization

    Programming Program Message Syntax N O T E Multiple commands may be any combination of compound and simple commands. Initialization To make sure the bus and all appropriate interfaces are in a known state, begin every program with an initialization statement. HP BASIC provides a CLEAR command which clears the interface bu er: CLEAR 720 ! initializes the interface of the instrument When you are using GPIB, CLEAR also resets the polarization controller's...

  • Page 80: Interface Capabilities

    Programming over GPIB This section describes the GPIB interface functions and some general concepts. In general, these functions are de ned by IEEE 488.2. They deal with general interface management issues, as well as messages which can be sent over the interface as interface commands. Interface capabilities The interface capabilities of the polarization controller as de ned by IEEE 488.1, are SH1, AH1, T5, L4, SR1, RL1, PP1, DC1, DT1, C0, and E2.

  • Page 81: Addressing

    Programming Programming over GPIB Addressing To allow the instrument to go into remote mode when sent a GPIB command, send the command: ''REMOTE 7'' To place the instrument in remote mode, send the command: ''REMOTE 720'' N O T E There is no way to place the instrument in remote mode from the front-panel.

  • Page 82: Communicating Over The Bus

    Programming Programming over GPIB Communicating over the bus (HP 9000 series 200/300 controller) Since GPIB can address multiple devices through the same interface card, the device address passed with the program message must include not only the correct interface select code, but also the correct instrument address. Each interface card has a unique interface select code.

  • Page 83: Lockout

    Programming Programming over GPIB Lockout To disable front-panel control while a program is running, send the LOCAL LOCKOUT command. The instrument can be returned to local mode by sending the LOCAL command to the instrument. N O T E Cycling the power also restores front-panel control. Bus commands The following commands are IEEE 488.2 bus commands (ATN true).

  • Page 84: Common Commands

    Programming Common Commands Common commands The *CLS (clear status) common command clears the status data structures, *CLS (Clear Status) including the device-de ned error queue. This command also clears the Request-for-OPC ag. If the *CLS command immediately follows a program message terminator, the output queue and the MAV (message available) bit are cleared.

  • Page 85: Ese (Event Status Enable)

    Programming Common Commands The *ESE command sets the bits in the Standard Event Status Enable *ESE Register. The Standard Event Status Enable Register contains a mask value (Event Status Enable) for the bits to be enabled in the Standard Event Status Register. A one in the Standard Event Status Enable Register enables the corresponding bit in the Standard Event Status Register.

  • Page 86: Esr (Event Status Register)

    Programming Common Commands The *ESR query returns the contents of the Standard Event Status Register. *ESR (Event Status Register) When you read the Event Status Register, the value returned is the total bit weights of all of the bits that are high at the time you read the byte. Table 4-2 shows each bit in the Event Status Register and its bit weight.

  • Page 87: Idn (Identi Cation Number)

    The *IDN query identi es the instrument type and software version by *IDN returning the following string: (Identi cation Number) \ HEWLETT-PACKARD 11896A 0 <X.X> " Where: <X.X> ::= the software revision of the instrument. An *IDN query must be the last query in a message. Any queries after the *IDN query in a program message are ignored.

  • Page 88: Rcl (Recall)

    Programming Common Commands The *RCL command restores the state of the instrument from the speci ed *RCL (Recall) save/recall register. An instrument setup must have been stored previously in the speci ed register. *RCL 0 has the same e ect as *RST. f j j j j j j j j j g Command Syntax: The *RST command places the instrument in a known state.

  • Page 89: Sre (Service Request Enable)

    Programming Common Commands The *SRE command sets the bits in the Service Request Enable Register. The *SRE Service Request Enable Register contains a mask value for the bits to be (Service Request Enable) enabled in the Status Byte Register. A one in the Service Request Enable Register enables the corresponding bit in the Status Byte Register.

  • Page 90: Stb (Status Byte)

    Programming Common Commands The *STB query returns the current value of the instrument's status byte. *STB (Status Byte) The MSS (Master Summary Status) bit is reported on bit 6 instead of the RQS (request service) bit. The MSS indicates whether or not the device has at least one reason for requesting service.

  • Page 91: Tst (Test)

    Programming Common Commands The *TST query performs a self-test on the instrument. The result of the test *TST (Test) is placed in the output queue. A zero indicates the test passed and a non-zero value indicates the test failed. If a test fails, refer to the troubleshooting section of the polarization controller service manual.

  • Page 92: Instrument Speci C Commands

    Programming Instrument Speci c Commands Instrument speci c commands The :ABORt command stops the scanning. The instrument is placed in :ABORt manual mode and the scan time is set to zero. The :INITiate:IMMediate command must be executed to restart the paddles scanning. Command Syntax: The :INITiate:IMMediate command starts the paddles scanning.

  • Page 93: Paddle:position

    Programming Instrument Speci c Commands The :PADDle:POSition command sets the positions of one of the paddles when :PADDle:POSition the instrument is in manual mode. To insure the paddle has reached its nal position, it is best to send either the *WAI or *OPC commands before issuing other commands.

  • Page 94: Scan:rate

    Programming Instrument Speci c Commands The :SCAN:RATE command sets the scan rate of the paddles to one of eight :SCAN:RATE possible values. Scan rate \1" is the slowest rate, scan rate \8" is the fastest scan rate. Setting the scan when the instrument is already scanning resets the scan timer.

  • Page 95: Scan:timer:clear

    Command Syntax: The :STATus:OPERation:CONDition query always returns zero for the :STATus:OPERation Agilent 11896A. It is a required command for IEEE 488.2 and is implemented :CONDition only for completeness. Query Syntax: The STATus:OPERation:ENABle command sets the status enable register.

  • Page 96: Status:operation :Event

    Programming Instrument Speci c Commands The :STATus:OPERation:EVENt query always returns zero for the Agilent :STATus:OPERation 11896A. It is a required command for IEEE 488.2 and is implemented only for :EVENt completeness. Query Syntax: The :STATus:PRESet command presets the SCPI transition lters, the SCPI :STATus:PRESet enable registers, and the SCPI error/event queue enable.
  • Page 97 Command Syntax: < > Query Syntax: < >< > < > The :STATus:QUEStionable:EVENt query always returns zero for the :STATus:QUEStionable Agilent 11896A. It is a required command for IEEE 488.2 and is implemented :EVENt only for completeness. Query Syntax: 4-32...

  • Page 98: System:error

    Programming The :SYSTEM:ERROR query outputs the next error number in the error :SYSTem:ERRor queue over the interface. This instrument has an error queue that is 30 errors deep and operates on a rst-in, rst-out basis. Repeatedly sending the query :SYSTEM:ERROR? returns the error numbers in the order they occurred until the queue is empty.

  • Page 99: System:version

    Programming The :SYSTem:VERSion query returns the version of SCPI with which this :SYSTem:VERSion instrument complies. Query Syntax: g< > 4-34...

  • Page 100: Veri Cation And Service Information

    Veri cation and Service Information...
  • Page 101 Veri cation and Service Information What you'll nd in this chapter How to perform a quick veri cation check of the Agilent 11896A lightwave polarization controller. How to verify the Agilent 11896A speci cations. How to return the Agilent 11896A polarization controller for service.

  • Page 102: Performing A Veri Cation Check

    Performing a Veri cation Check To verify the functionality of the Agilent 11896A polarization controller, use the following procedure. 1. Turn on the polarization controller by setting the front-panel power Verify startup switch to the \1" position. 2. Recall register zero (0) by pressing:...

  • Page 103: Verify The Local Function

    Veri cation and Service Information Performing a Veri cation Check 4. Verify the Local function by pressing: Verify the LOCAL function LOCAL The display will read: HPIB ADDR:11 (The number 11 is used as an example, your display may be di erent.) Turn the right-hand knob. The GPIB address on the display will change over a range of 00 to 30.

  • Page 104: Verify The Event Timer

    Veri cation and Service Information Performing a Veri cation Check 12. Recall the position values in register 1 by pressing: RECALL Adjust the right-hand knob until \ RECALL:1 " is displayed. 13. Press ENTER The display will change to: 500:500:500:500 14. Recall the position values in register 2 by pressing: RECALL Adjust the right-hand knob until the display reads: ''RECALL:2''...

  • Page 105: If The Veri Cation Check Fails

    Performing a Veri cation Check If the veri cation check fails If the Agilent 11896A does not pass the veri cation 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.

  • Page 106: Verifying The Agilent 11896A Speci Cations

    Verifying the Agilent 11896A Speci cations To verify the speci cations of the Agilent 11896A polarization controller, use the following procedures. Insertion loss can be tested using a number of di erent test equipment Insertion loss con gurations. Some of these are: an Agilent 8702 or Agilent 8703 lightwave component analyzer system with...
  • Page 107 Veri cation and Service Information Verifying the Agilent 11896A Speci cations Return loss can be tested using a number of di erent test equipment Return loss con gurations. Some of these are: an Agilent 8703 lightwave component analyzer an Agilent 8702 analyzer with the appropriate source, receiver and...

  • Page 108: How To Return The Agilent 11896A For Service

    How to Return the Agilent 11896A for Service When an instrument is returned to an Agilent Technologies service oce for servicing, it must be adequately packaged and have a complete description of the failure symptoms attached. When describing the failure, please be as speci c as possible about the nature of the problem.

  • Page 109: Instrument Shipping Preparation Procedure

    Veri cation and Service Information How to Return the Agilent 11896A for Service Instrument shipping preparation procedure 1. Write a complete description of the failure and attach it to the instrument. Include any speci c performance details related to the problem. The following information should be returned with the instrument.
  • Page 110 Veri cation and Service Information How to Return the Agilent 11896A for Service Inappropriate packaging of instruments may result in damage to the C A U T I O N instrument during transit. Wrap the instrument in antistatic plastic to reduce the possibility of damage caused by electrostatic discharge.

  • Page 111: Sales And Service OCes

    How to Return the Agilent 11896A for Service Sales and service oces Sales and service oces Agilent Technologies has sales and service oces located around the world to provide complete support for Agilent Technologies products. To obtain servicing information or to order replacement parts, contact the nearest Agilent Technologies Sales and Service Oce.

  • Page 112: Agilent Technologies Service Numbers

    Veri cation and Service Information How to Return the Agilent 11896A for Service Table 5-1. Agilent Technologies Service Numbers 5-13...

  • Page 113: Service Information

    Service Information What you'll nd in this section This section describes how to service the Agilent 11896A. It contains the following service information: General Information Adjustment Procedure Troubleshooting Replacement Procedures Replaceable Parts General information Whenever you contact Agilent Technologies about your lightwave polarization Serial-number information controller, have the complete serial number and option designation available.

  • Page 114: Reliability Considerations

    Veri cation and Service Information Service Information Failure to ground the lightwave polarization controller properly can result W A R N I N G in personal injury, as well as instrument damage. Before turning on the lightwave polarization controller, connect a three-wire power cable with a standard IEC 320-C13 (CEE 22-V) inlet plug to the lightwave polarization controller power receptacle.

  • Page 115: Required Service Tools

    Veri cation and Service Information Service Information Table 5-2 lists the tools that may be required to service the Agilent 11896A. Required service tools Table 5-2. Required Tools Description Agilent Part Number Description Suhner P/N Adjustment procedure The only adjustment for the Agilent 11896A is the +5.7 Vdc voltage supply.

  • Page 116: Replacement Procedures

    Service Information Replacement procedures This section describes procedures for replacing the assemblies in the Agilent 11896A polarization controller. To replace an assembly: Locate the desired assembly in Figure 5-1. Follow the steps for removing the desired assembly. Replace the assembly.

  • Page 117: To Replace The Front-Panel Assembly

    Veri cation and Service Information Service Information 1. Remove the front-panel assembly as described in \To replace the To replace the front-panel assembly". polarization assembly 2. Gently unplug the power supply cable, line voltage cable, and ribbon cables (2) from the polarization assembly. Take care not to bend the pins. 3.

  • Page 118: Replaceable Parts

    Veri cation and Service Information Service Information Replaceable parts This section contains information for identifying and ordering replacement assemblies and mechanical parts for the Agilent 11896A lightwave polarization controller. Table 5-3 lists information for each major assembly and for each major Replaceable parts mechanical and electrical part that is not part of a major assembly.

  • Page 119: Direct Mail-Order System

    Veri cation and Service Information Service Information Within the USA, Agilent Technologies can supply parts through a direct Direct mail-order system mail-order system. Advantages of using the system are as follows: Direct ordering and shipment from Agilent Technologies. No maximum or minimum on any mail order. (There is a minimum order amount for parts ordered through a local Agilent oce when the orders require billing and invoicing.)

  • Page 120: Agilent 11896A Assembly Level Replaceable Parts

    Veri cation and Service Information Figure 5-1. Agilent 11896A assembly level replaceable parts. Table 5-3. Assembly-Level Replaceable Parts Index Agilent Part Description Number Number 5-21...
  • Page 121 Veri cation and Service Information...

  • Page 122: Choosing The Scan Rate And Measurement Time

    Choosing the Scan Rate and Measurement Time...

  • Page 123: Single Wavelength Pdl Measurements

    20 ms. Optimum measurements can be made when: The polarization state generated by the Agilent 11896A does not change signi cantly during the averaging time of the optical power meter. The polarization state changes fast enough to make the measurement in a period of time that avoids signi cant long term source drift.

  • Page 124: Swept Wavelength Pdl Measurements

    Swept wavelength PDL measurements Typical parameters for the Agilent 71451A Option 002, white light source, and Option 003, swept PDL kit (with the Agilent 11896A), are shown below. Sweep times are in the range of 1 to 5 seconds. Wavelength range:...

  • Page 125: Depolarization Application

    Depolarization application When using scan rate 8, the polarization state at the output of the Agilent 11896A is changing fast enough to act as a depolarizer for detectors with a long averaging time. A detector averages over many polarization states during its averaging time and the polarization-dependent responsivity (PDR) of the detector is reduced or eliminated.

  • Page 126: Measurement Considerations

    Measurement Considerations...

  • Page 127: Overall Insertion Loss

    Measurement Considerations Overall insertion loss On the Agilent 11896A standard and Option 010, insertion loss is limited by the condition and cleanliness of the ber optic connectors. The insertion loss of the Agilent 11896A Option 010 also depends on which connector family is used.

  • Page 128: Insertion Loss Variation With Paddle Position

    Measurement Considerations Insertion loss variation with paddle position When the paddles of the Agilent 11896A are rotated, ber bend losses and polarization dependent losses may result in small changes in insertion loss. On the Agilent 11896A standard and Option 010, the insertion variation is determined almost entirely by the polarization dependent loss (PDL) of the ber optic connector interface.

  • Page 129: Extinction Ratio

    Agilent 11896A approaches 100% and the extinction ratio of the second linear polarizer exceeds the extinction ratio of the Agilent 11896A. Figure B-1. Block diagram for testing the extinction ratio of the Agilent 11896A.

  • Page 130: Paddle Angle Repeatability

    SOP di erently, depending on the input SOP. Settling time Settling time is de ned as the worst-case time for the Agilent 11896A to recall and stabilize at a new set of paddle positions. The settling time is approximately proportional to the maximum rotation angle through which any paddle must travel.
  • Page 131 Measurement Considerations...

  • Page 132: Index

    Index...
  • Page 133 Agilent maintenance contract, 5-6 Agilent Technologies Service Oces, 5-12 application setup, 1-3 assembly-level replaceable parts, 5-21 assembly replacement, 5-17 before servicing the Agilent 11896A, 5-6 blue repair tag, 5-10 bus command device clear (DCL), 4-18 interface clear (IFC), 4-18 calibration, recommended interval, 1-11...
  • Page 134 3-4 data mode operation, 4-15 declaration of conformity, 1-13 depolarization application, A-4 description of the Agilent 11896A polarization controller, 1-3 device address, 4-5 device clear (DCL) command, 4-18 dimension speci cations, 1-12 direct mail-order system, 5-20...
  • Page 135 GPIB changing the address, 4-3 connector replacement, 5-18 display/change address, 3-11 local function, 3-11 rear panel connector, 3-6 handling of connectors/cable ends, 2-11 header types, 4-7 hotline orders, 5-20 humidity, 1-12 *IDN (Identi cation Number), 4-22 initial inspection, 2-3 initialization, 4-14 :INITiate:IMMediate, 4-27 input power, 1-12 insertion loss, 1-12, 2-9, B-2...
  • Page 136 nominal quarter-wave plates for paddles, B-5 non-operating temperature, 1-12 numeric program data, 4-12 *OPC (Operation Complete), 4-22 operating speci cations, 1-12 optical performance insertion loss, 2-17 return loss, 2-18 optical return loss, 1-12, B-3 options, 1-4 output command, 4-5 output queue, 4-10 packaging materials, 5-9 paddle adjustment, 1-12, 3-7...
  • Page 137 4-12 program header, 4-11 program message terminator, 4-13 query command, 4-10 simple command header, 4-7 white space (separator), 4-6 repair options, 5-6 replaceable parts, 5-19, 5-21 replacement procedure, 5-17 returning the Agilent 11896A for service, 5-9 return loss, 2-9 Index-6...
  • Page 138 (SDC) command, 4-18 serial numbers, 1-14, 5-14 service assembly-level parts, 5-21 information, 5-14 options, 5-6 returning the Agilent 11896A, 5-9 tools, 5-16 Service Request Enable Register, 4-24 setting the scan rate, 3-9 settling time for paddles, B-5 shipping...
  • Page 139 states of polarization (SOP), 3-7 Status Byte Register, 4-24{25 status indicators, 3-4 :STATus:OPERation:CONDition, 4-30 :STATus:OPERation:ENABle, 4-30 :STATus:OPERation:EVENt, 4-31 :STATus:PRESet, 4-31 :STATus:QUEStionable:CONDition, 4-31 :STATus:QUEStionable:ENABle, 4-32 :STATus:QUEStionable:EVENt, 4-32 *STB (Status Byte), 4-25 storage of connectors/adapters, 2-14 storage temperature, 1-12 swept-wavelength measurement time, A-3 PDL measurement, 1-6 scan rate, A-3 :SYSTem:ERRor, 4-33...

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