Agilent Technologies 11896A User'S And Service Manual Download

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General

Information

What

you'll

this

chapter

description

the

Agilent

11896A

polarization

controller

list

options

and

accessories

available

Agilent

11896A

polarization

controller

specications

and

characteristics.

Information

about

the

controller's

serial

number

label.

Information

about

avoiding

damage

the

controller

from

electrostatic

discharge

1-2

Summary of Contents for 11896A

Page 1: ... underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective ...

Page 2: ...User Programming and Service Guide Agilent 11896A Polarization Controller ...

Page 3: ...ent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Agilent Part Number 11896 90011 Printed in USA April 2000 c Copyright Agilent Technologies 2000 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed un...

Page 4: ...m 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 iii ...

Page 5: ...e with an instrument will execute its programming instructions when properly installed on that instrument Agilent Technologies does not warrant that the operation of the instrument or software or rmware will be uninterrupted or error free Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or in...

Page 6: ...sistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products For any assistance contact your nearest Agilent Technologies Service O ce v ...

Page 7: ...the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met W A R N I N G The warning sign denotes a life threatening hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met Instru...

Page 8: ...cket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous Intentional interruption is prohibited W A R N I N G There are many points in the instrument which can if contacted cause personal injury Be extremely careful Any adjustments or service procedures that require operation of ...

Page 9: ...or use and how to make ber optic connections Chapter 3 shows how to manually control the lightwave polarization controller Chapter 4 shows how to control the lightwave polarization controller using a computer Chapter 5 provides procedures for verifying and servicing the Agilent 11896A polarization controller Appendix A selecting scan rate and measurement time Appendix B measurement considerations ...

Page 10: ...15 Reducing ESD damage 1 17 2 Installation and Preparation for Use Preparing the Polarization Controller for Use 2 3 Initial inspection 2 3 Connecting the Agilent 11896A to a power source 2 4 Power requirements 2 4 Checking the fuse 2 4 Power cable 2 5 Turning on the Agilent 11896A 2 8 Lightwave Connector Care 2 9 Introduction 2 9 Cleaning and handling 2 11 De nition of terms 2 11 Handling 2 11 Cl...

Page 11: ...p all polarization states 3 9 To set the scan rate 3 9 To save an instrument state 3 10 To recall an instrument state 3 10 To use the Local function 3 11 To display or change the GPIB address 3 11 4 Programming Changing the GPIB address 4 3 Talking to the Instrument 4 4 Program Message Syntax 4 5 Output command 4 5 Device address 4 5 Instructions 4 6 Instruction header 4 6 White space separator 4 ...

Page 12: ...instrument 4 17 Lockout 4 18 Bus commands 4 18 Device clear 4 18 Interface clear 4 18 Common commands 4 19 CLS Clear Status 4 19 ESE Event Status Enable 4 20 ESR Event Status Register 4 21 IDN Identi cation Number 4 22 OPC Operation Complete 4 22 RCL Recall 4 23 RST Reset 4 23 SAV Save 4 23 SRE Service Request Enable 4 24 STB Status Byte 4 25 TST Test 4 26 WAI Wait 4 26 Instrument speci c commands...

Page 13: ...t 11896A for Service 5 9 Packaging 5 9 Instrument shipping preparation procedure 5 10 Sales and service o ces 5 12 Sales and service o ces 5 12 Service Information 5 14 General information 5 14 Serial number information 5 14 Safety considerations 5 14 Reliability considerations 5 15 Protection from electrostatic discharge 5 15 Required service tools 5 16 Adjustment procedure 5 16 Replacement proce...

Page 14: ...velength PDL measurements A 3 Depolarization application A 4 B Measurement Considerations Overall insertion loss B 2 Insertion loss variation with paddle position B 3 Optical return loss B 3 Extinction ratio B 4 Paddle angle repeatability B 5 Settling time B 5 Paddle rotation rates B 5 Nominal quarter wave plates B 5 Index Contents 5 ...

Page 15: ...nalyzer 1 6 1 4 Example of swept wavelength PDL test data 1 7 1 5 Setup for single wavelength max min PDL measurements 1 8 1 6 Example of max min PDL measurement data 1 9 1 7 Agilent 11896A polarization controller block diagram 1 10 1 8 Example of a static safe work station 1 16 2 1 Checking the fuse 2 5 5 1 Agilent 11896A assembly level replaceable parts 5 21 B 1 Block diagram for testing the ext...

Page 16: ...bles Available 2 7 4 1 Standard Event Status Enable Register 4 20 4 2 Standard Event Status Register 4 21 4 3 Service Request Enable Register 4 24 4 4 Status Byte Register 4 25 4 5 Error Messages 4 33 5 1 Agilent Technologies Service Numbers 5 13 5 2 Required Tools 5 16 5 3 Assembly Level Replaceable Parts 5 21 A 1 Selecting Averaging Time Scan Rate and Measurement Time A 3 Contents 7 ...

Page 17: ...Contents ...

Page 18: ...1 General Information ...

Page 19: ...96A 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 1 2 ...

Page 20: ...tions 60 002 dB This performance combination maximizes measurement accuracy for power sensitive measurements such as polarization dependent loss gain and optical electrical responsitivity because the measurement uncertainty contributed by the polarization controller is minimized A typical application con guration using the polarization controller is shown in Figure 1 1 Figure 1 1 Typical applicati...

Page 21: ... 11896A User Programming and Service Guide Options The following options are available Option Description Option 010 Deletes FC PC front panel connector interfaces Option 025 One meter pigtail ber with FC PC connector interfaces Accessories The Fiber Optics Handbook Agilent part number 5952 9654 is an introduction to and a reference for ber optic measurements 1 4 ...

Page 22: ...51A optical spectrum analyzer and the Agilent 8509A B lightwave polarization analyzer Power meter PDL measurement system Figure 1 2 shows how to con gure the Agilent 11896A polarization controller and the Agilent 8153A optical power meter for performing automatic single wavelength PDL measurements Measurement repeatability of a few thousandths of a dB can typically be achieved Figure 1 2 Setup for...

Page 23: ...hows how to con gure the Agilent 11896A polarization controller and the Agilent 71451A optical spectrum analyzer for performing automatic swept wavelength PDL measurements Figure SWPTWAVE here Figure 1 3 Setup for swept wavelength PDL measurements using an optical spectrum analyzer 1 6 ...

Page 24: ... 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 1 7 ...

Page 25: ...Figure 1 5 shows how to setup the Agilent 11896A polarization controller and the Agilent 8509A B lightwave polarization analyzer for performing automatic single wavelength max min PDL measurements Figure 1 5 Setup for single wavelength max min PDL measurements 1 8 ...

Page 26: ...ata 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 Example of max min PDL measurement data 1 9 ...

Page 27: ...er response over the polarization controller s speci ed wavelength range Complete and continuous polarization adjustability is achieved by independently adjusting each loop over an angular range of 180 This range is divided into 1000 equal steps 000 999 providing an adjustment resolution of 0 18 Adjustments can be made manually using the front panel knobs or automatically using remote GPIB command...

Page 28: ...interfaces are assumed for all cases except where otherwise stated Speci cations Speci cations describe warranted performance Characteristics Characteristics provide useful but nonwarranted information about the functions and performance of the instrument Characteristics are printed in italics Calibration cycle Agilent Technologies warrants instrument speci cations over the recommended calibration...

Page 29: ... angular repeatability 0 18 5 0 18 5 Settling time 1 sec 1 sec Number of scan rates 8 8 Maximum paddle rotation rate 360 sec 360 sec Number of SAVE RECALL memory registers 9 9 Maximum allowable input power 23 dBm 23 dBm Operating Speci cations Operating temperature 0 C to 55 C Non operating storage temperature 040 C to 70 C Humidity 15 to 95 non condensing Power requirements 47 to 63 Hz 90 to 264 ...

Page 30: ...General Information Speci cations and Characteristics 1 13 ...

Page 31: ...ion controller have the complete serial number available to ensure obtaining the most complete and accurate information possible A serial number label is attached to the rear of the polarization controller It contains the serial number and the options installed in the polarization controller The serial number has two parts the pre x the rst four numbers and a letter and the su x the last ve number...

Page 32: ...rist strap combination Conductive oor mat and heel strap combination Both types when used together provide a signi cant level of ESD protection Of the two only the table mat and wrist strap combination provides adequate ESD protection when used alone To ensure user safety the static safe accessories must provide at least 1 M of isolation from ground W A R N I N G These techniques for a static safe...

Page 33: ...General Information Electrostatic Discharge Information Figure 1 8 Example of a static safe work station 1 16 ...

Page 34: ...t all instruments are properly earth grounded to prevent a buildup of static charge Table 1 2 lists static safe accessories that can be obtained from Agilent Technologies using the Agilent part numbers shown Table 1 2 Static Safe Accessories Agilent Part Number Description 9300 0797 Set includes 3M static control mat 0 6 m 2 1 2 m 2 ft2 4 ft and 4 6 cm 15 ft ground wire The wrist strap and wrist s...

Page 35: ...General Information ...

Page 36: ...2 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 2 2 ...

Page 38: ...n Chapter 5 the shipping container is damaged or the cushioning material shows signs of stress Keep the shipping materials for the carrier s inspection The Agilent Technologies o ce will arrange for repair or replacement without waiting for a claim settlement If the shipping materials are in good condition retain them for possible future use You may wish to ship the polarization controller to anot...

Page 39: ...er requirements Table 2 2 Agilent 11896A Power Requirements Characteristic Requirement Input Voltage 90 to 264 Vrms Frequency 47 to 63 Hz Power 60 VA maximum Checking the fuse The recommended fuse is a 2 A 250 V Agilent part number 2110 0710 The line fuse is housed in a small container in the line module refer to Figure 2 1 The spare fuse is stored below the line fuse To check the fuse insert the ...

Page 40: ...oller 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 2 5 ...

Page 41: ... power cable or autotransformer without a protective ground conductor If you are using an autotransformer make sure its common terminal is connected to the protective earth contact of the power source outlet socket Various power cables are available to connect the polarization controller to the types of ac power outlets unique to speci c geographic areas The cable appropriate for the area to which...

Page 42: ...Installation and Preparation for Use Preparing the Polarization Controller for Use Table 2 3 AC Power Cables Available 2 7 ...

Page 43: ...nserted 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 refer to Performing a Veri cation Check in Chapter 5 2 8 ...

Page 44: ...and the system However regardless of the cable type the connectors have only one function to provide a direct and low loss optical signal transition from one ber end to another When these connectors are used in a measurement system repeatability becomes an important factor Lightwave connectors di er from electrical or microwave system connectors In a ber optic system light is transmitted through a...

Page 45: ...two bers spacing and air gaps re ections caused by damaged worn or loose ber ends and the improper use and removal of index matching compounds Achieving the best possible connection where the ber end faces are ush no air gap and properly aligned depends on two things 1 the type of connector 2 using the proper cleaning and connecting techniques If the connection is lossy or re ective light will not...

Page 46: ...sed to mate two optical connectors Handling Always handle lightwave connectors and cable ends with great care Fiber ends should never be allowed to touch anything except other mating surfaces or cleaning solutions and tools Always keep connectors and cable ends covered with a protective cap when they are not in use See Storage Cleaning Three cleaning processes are provided The rst process describe...

Page 47: ...e alcohol to clean the ber end Some amount of wiping or mild scrubbing of the ber end can help remove particles when application of alcohol alone will not remove them This can be done by applying the alcohol to a cotton swab and moving it back and forth across the ber end several times This technique can help remove or displace particles smaller than one micron Allow the connector to dry about a m...

Page 48: ...ts left from cleaning the inside of adapters Process Clean the adapter by applying isopropyl alcohol to the inside of the connector with a foam swab Allow the adapter to air dry or dry it immediately with clean compressed air Cleaning lensed connections Some instruments may have a connector that is lensed In other words the connection does not provide a physically contacting connection but the lig...

Page 49: ...s on the instrument If you remove these adapters you should keep the exposed connector of your instrument covered until the next use Protective covers for these exposed connectors are not provided with the instruments so it is best to keep the adapters on the instrument with the dust covers on The list below provides the Agilent part numbers for the laser shutter cap and dust caps that are provide...

Page 50: ...turer s data sheet to con rm connector type compatibility before connecting When you insert the ferrule into a connector or adapter make sure that the ber end does not touch the outside of the mating connector or adapter In this way you will not rub the ber end against any undesirable surface Many connectors have a keyed slot provided for optimum measurement repeatability that also helps to align ...

Page 51: ...ber ends can be helpful Contamination and or imperfections on the cable endface can be detected as well as cracks or chips in the ber itself Several ber inspection scopes are on the market but any microscope with an enlargement range of 1002 to 2002 can be used It is helpful to devise some method to hold the ber in place while viewing in this range Inspect the entire endface for contamination rais...

Page 52: ...r of di erent test equipment con gurations Some of these are an Agilent 8702 or Agilent 8703 lightwave component analyzer system with the lightwave source and receivers an Agilent 83420 lightwave test set with an Agilent 8510 network analyzer an Agilent 8153 lightwave multimeter with source and power sensor modules Many other possibilities exist The basic requirements are an appropriate lightwave ...

Page 53: ...wave multimeter with an Agilent 81543 return loss module Many other possibilities exist The basic requirements are an appropriate lightwave source a compatible lightwave receiver and a compatible lightwave coupler Refer to the manuals provided with your lightwave test equipment for information on how to perform a return loss test As mentioned earlier in this handbook typical return loss is better ...

Page 54: ...3 Using the Agilent 11896A Polarization Controller ...

Page 55: ...nt 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 3 2 ...

Page 56: ...Front Panel Features The front panel of the polarization controller includes three main sections Polarization adjustment Instrument state Data entry 3 3 ...

Page 57: ... address when using the front panel function keys The Agilent 11896A front panel 1 Display screen Used to display paddle positions and instrument settings 2 Status indicators Indicates the current status of the RMT LSN TLK and SRC lines 3 Polarization adjustment keys Includes the 4MANUAL5 4AUTO SCAN5 and 4SCAN RATE5 keys 4 Instrument state keys Includes the 4SAVE5 4RECALL5 and 4LOCAL5 keys 5 Data ...

Page 58: ...lty motor and so forth SCPI ERR Execution problem occurred in the SCPI controller such as the memory or a CPU register is corrupted This message is displayed for 12 seconds and then the instrument will attempt to reboot The following errors can be displayed if an error is detected when the instrument is initially turned on SCPI E1 SCPI E2 Error 1 HAP E1 If any of these errors are displayed on the ...

Page 59: ...Rear Panel Features The Agilent 11896A rear panel 1 Power input 2 GPIB connector 3 6 ...

Page 60: ...tes of polarization SOP Autoscanning continuously sweeps all states of polarization in a random fashion eliminating the need to manually tune the SOP across the entire Poincare sphere Eight polarization scan rates are available to match the speed of the application whether it is a ve minute wavelength scanning PDL measurement or a three second single wavelength PDL measurement Autoscanning rates a...

Page 61: ...for approximately one second The rmware revision number is displayed for approximately one second All four paddles are set to the middle position 500 The SAVE and RECALL registers the SCAN RATE and the GPIB address contain the same values they had when the power was last turned o To use the Manual mode To control the paddles from the front panel press 4MANUAL5 Each of the four paddles can now be c...

Page 62: ...tive 0 minutes 0 seconds Polarization scanning is initiated at the current scan rate The elapsed scan time in minutes and seconds is displayed along with the current scan rate To set the scan rate To change the scan rate press 4SCAN RATE5 The current scan rate is displayed Adjust the scan rate using the right most knob To select and lock in the displayed scan rate press 4ENTER5 N O T E The scan ra...

Page 63: ...e saved instrument state scan or manual paddle positions scan rate To recall an instrument state To recall a previously saved instrument state press 4RECALL5 The number of the last Save register used is displayed Use the right most knob to select the desired register 1 9 To recall the instrument state of the displayed register press 4ENTER5 The following instrument parameters are recalled instrume...

Page 64: ...ontroller is under remote GPIB control enable local control by pressing 4LOCAL5 To display or change the GPIB address To display or change the GPIB address press 4LOCAL5 The current GPIB address is displayed Use the right most knob to select the desired address 1 30 To save the currently displayed address press 4ENTER5 3 11 ...

Page 65: ...Using the Agilent 11896A Polarization Controller Using the Agilent 11896A ...

Page 66: ...4 Programming ...

Page 67: ...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 Make measurements Get data measurements con guration from the polarization controller Send information con gurations to the polarization controller Other tasks are accomplished by combini...

Page 68: ...anging 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 HP 9000 Series 200 300 Controller 4 3 ...

Page 69: ...the OUTPUT statement for sending commands and queries After a query is sent the response is usually read in using the ENTER statement Messages are placed on the bus using an output command and passing the device address program message and terminator Passing the device address ensures that the program message is sent to the correct interface and instrument The following HP BASIC statement sends a ...

Page 70: ...ASIC 5 0 is used in the examples of individual commands If you are using other languages you will need to nd the equivalents of HP BASIC commands like OUTPUT ENTER and CLEAR in order to convert the examples The instructions listed in this manual are always shown between quotes in the example programs Device address The location where the device address must be speci ed is also dependent on the pro...

Page 71: ...sent the operation to be performed by the instrument Queries are indicated by adding a question mark to the end of the header Many instructions can be used as either commands or queries depending on whether or not you have included the question mark The command and query forms of an instruction usually have di erent program data Many queries do not use any program data White space separator White ...

Page 72: ... in this chapter has all of the general rules about acceptable values When there is more than one data parameter they are separated by commas Spaces can be added around the commas to improve readability Header types There are three types of headers Simple Command headers Compound Command headers Common Command headers Simple command header Simple command headers contain a single mnemonic INITIATE ...

Page 73: ...separator program data terminator For example PADD1 POSITION 50 Common command header Common command headers control IEEE 488 2 functions within the instrument such as clear status Their syntax is command header terminator No space or separator is allowed between the asterisk and the command header CLS is an example of a common command header Combining commands To execute more than one function wi...

Page 74: ...us 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 STATus OPER ENABle 15 To set the fth bit of the enable register for the status questionable register use STATus QUES ENABle 16 OPER and QUES are subsystem selectors and determine which status register the operation or t...

Page 75: ... Query commands are used to nd out how the instrument is currently con gured They are also used to get results of measurements made by the instrument For example the command SCAN TIMER instructs the instrument to report the amount of time elasped in seconds since scanning was initiated The output queue must be read before the next program message is sent For example when you send the query SCAN TI...

Page 76: ... 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 PADDLE1 POSITION 50 long form PADD1 POS 50 short form Programs written in long form are easily read and are almost self documenting The short form syntax conserves the amount of controller memory needed for program storage and reduces the amoun...

Page 77: ...exponential notation or using su x multipliers to indicate the numeric value The following numbers are all equal 28 0 28E2 280e 1 28000m 0 028K 28e 3K When a syntax de nition speci es that a number is an integer that means that the number should be whole Any fractional part would be ignored truncating the number Numeric data parameters which accept fractional values are called real numbers All num...

Page 78: ...line low on the last byte of the data message The NL character is an ASCII linefeed decimal 10 N O T E The NL New Line terminator has the same function as an EOS End Of String and EOT End Of Text terminator Selecting multiple subsystems You can send multiple program commands and program queries for di erent subsystems on the same line by separating each command with a semicolon The colon following...

Page 79: ...lears the interface bu er CLEAR 720 initializes the interface of the instrument When you are using GPIB CLEAR also resets the polarization controller s parser The parser is the program which reads in the instructions which you send it After clearing the interface initialize the instrument to a preset state OUTPUT 720 RST initializes the instrument to a preset state N O T E Refer to your controller...

Page 80: ...ce 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 Command and data concepts The interface has two modes of operation command mode data mode The bus is in the command mode when the ATN line is true The command mode is used to send talk and listen addresses and various bus commands such as a group execute trigger GET The bus is in ...

Page 81: ...peci es which devices talk and which listen An instrument may be talk addressed listen addressed or unaddressed by the controller If the controller addresses the instrument to talk the instrument remains con gured to talk until it receives an interface clear message IFC another instrument s talk address OTA its own listen address MLA or a universal untalk command UNT If the controller addresses th...

Page 82: ...s selects instrument Each instrument on a GPIB must have a unique instrument address between decimal 0 and 30 The device address passed with the program message must include not only the correct instrument address but also the correct interface select code DEVICE ADDRESS Interface Select Code 100 Instrument Address For example if the instrument address for the polarization controller is 4 and the ...

Page 83: ...ands are IEEE 488 2 bus commands ATN true IEEE 488 2 de nes many of the actions which are taken when these commands are received by the instrument Device clear The device clear DCL or selected device clear SDC commands clear the input and output bu ers reset the parser and clear any pending commands Interface clear The interface clear IFC command halts all bus activity This includes unaddressing a...

Page 84: ...clears the status data structures 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 Command Syntax CLS Example OUTPUT 720 CLS 4 19 ...

Page 85: ...the register Command Syntax ESE mask Where mask 0 to 255 Example 1 OUTPUT 720 ESE 64 Query Syntax ESE Returned Format mask NL Where mask 0 to 255 integer NR1 format Example OUTPUT 720 ESE ENTER 720 Event PRINT Event 1 In this example the ESE 64 command enables URQ user request bit 6 of the Standard Event Status Enable Register Therefore when a front panel key is pressed the ESB event summary bit i...

Page 86: ...ESR ENTER 720 Event PRINT Event Table 4 2 Standard Event Status Register Bit Bit Weight Bit Name Condition 7 128 PON 0 no power on detected 1 power on detected 6 64 URQ 0 no front panel key has been pressed 1 a front panel key has been pressed 5 32 CME 0 no command errors 1 a command error has been detected 4 16 EXE 0 no execution error 1 an execution error has been detected 3 8 DDE 0 no device de...

Page 87: ... ignored Query Syntax IDN Returned Format HEWLETT PACKARD 11896A 0 X X NL Example DIM Id 50 OUTPUT 720 IDN ENTER 720 Id PRINT Id OPC Operation Complete The OPC operation complete command sets the operation complete bit in the Standard Event Status Register when all pending device operations have nished The OPC query places an ASCII 1 in the output queue when all pending device operations have nish...

Page 88: ...set The RST command places the instrument in a known state The instrument is placed in manual mode and all paddles are set to position 500 The scan rate and instrument status registers are not a ected Command Syntax RST Example OUTPUT 720 RST SAV Save The SAV command stores the current state of the device in a save register The data parameter is the number of the save register where the data will ...

Page 89: ... Enable Register and what they mask The SRE query returns the current value Command Syntax SRE mask Where mask 0 to 255 Example OUTPUT 720 SRE 32 Query Syntax SRE Returned Format mask NL Where mask sum of all bits that are set 0 through 255 integer NR1 format Example OUTPUT 720 SRE ENTER 720 Value PRINT Value Table 4 3 Service Request Enable Register Service Request Enable Register High Enables th...

Page 90: ... Query Syntax STB Returned Format value NL Where value 0 through 255 integer NR1 Example OUTPUT 720 STB ENTER 720 Value PRINT Value Table 4 4 Status Byte Register Bit Bit Weight Bit Name Condition 7 128 0 not used 6 64 RQS MSS 0 instrument has no reason for service 1 instrument is requesting service 5 32 ESB 0 no event status conditions have occurred 1 an enabled event status condition has occurre...

Page 91: ...e troubleshooting section of the polarization controller service manual Query Syntax TST Returned Format result NL Where result 0 or non zero value Where 0 indicates the test passed non zero indicates the test failed Example OUTPUT 720 TST ENTER 720 Result PRINT Result WAI Wait The WAI command causes the instrument to wait until the current command is completed before executing the next remote com...

Page 92: ... is placed in manual mode and the scan time is set to zero The INITiate IMMediate command must be executed to restart the paddles scanning Command Syntax ABORt Example OUTPUT 720 ABOR INITiate IMMediate The INITiate IMMediate command starts the paddles scanning Command Syntax INITiate IMMediate Example OUPUT 720 INIT IMM 4 27 ...

Page 93: ...his command generates an error The default is PADD1 The POSition query returns the position of a paddle Command Syntax PADDle 1 j 2 j 3 j 4 POSition fMAXimum j MINimum j value g Where value the position of the selected paddle Example OUTPUT 720 PADD POS 15 OUTPUT 720 PADD POS MAX Query Syntax PADD 1 j 2j 3 j 4 POS MAXimum j MINimum Returned Format value NL Where value the position of the selected ...

Page 94: ...j MINimum j value g Where value the desired scan rate Example OUTPUT 720 SCAN RATE 4 OUTPUT 720 SCAN RATE MAX Query Syntax SCAN RATE MAXimum j MINimum Returned Format value NL Where value the current scan rate or the maximum or minimum allowable range Example OUTPUT 720 SCAN RATE ENTER 720 Scan rate PRINT Scan rate SCAN TIMer The SCAN TIMer query returns the value of the scan timer in seconds Quer...

Page 95: ...d only for completeness Query Syntax STATus OPERation CONDition Example OUTPUT 720 STAT OPER COND ENTER 720 Result PRINT Result STATus OPERation ENABle The STATus OPERation ENABle command sets the status enable register The STATus OPERation ENABle query returns a decimal value indicating the number of bits set in the status enable register Command Syntax STATus OPERation ENABle value Where value 0...

Page 96: ...d presets the SCPI transition lters the SCPI enable registers and the SCPI error event queue enable The SCPI event registers the IEEE 488 2 status byte and the standard event status are not a ected Command Syntax STATus PRESet Example OUTPUT 720 STAT PRES STATus QUEStionable CONDition The STATus QUEStionable CONDition query always returns zero for the Agilent 11896A It is a required command for IE...

Page 97: ...e value 0 to 255 Example OUTPUT 720 STAT QUES ENAB 4 Query Syntax STATus QUEStionable ENABle Returned Format value NL Where value 0 TO 255 integer NR1 format Example OUTPUT 720 STAT QUES ENAB ENTER 720 Status enable PRINT Status enable STATus QUEStionable EVENt The STATus QUEStionable EVENt query always returns zero for the Agilent 11896A It is a required command for IEEE 488 2 and is implemented ...

Page 98: ...n variable the error number and the error message will be returned Query Syntax SYSTem ERRor Returned Format error NL Where error an integer error code Example OUTPUT 720 SYSTEM ERROR ENTER 720 Emsg PRINT Emsg Table 4 5 Error Messages Error Number Description 100 command error unknown command 101 invalid character 102 syntax error 103 invalid separator 104 data type error 105 get not allowed 108 p...

Page 99: ... VERSion The SYSTem VERSion query returns the version of SCPI with which this instrument complies Query Syntax SYSTem VERSion Returned Format fversiong NL Example OUTPUT 720 SYST VERS ENTER 720 version PRINT version 4 34 ...

Page 100: ...5 Veri cation and Service Information ...

Page 101: ... 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 How to service the Agilent 11896A polarization controller 5 2 ...

Page 102: ...select register zero 0 and then press 4ENTER5 The display will initially read HP 11896A V1 00 The number following V is the rmware revision number The number 1 0 is used as an example your display may be di erent Changing to 500 500 500 500 Verify the SCAN RATE function 3 Verify the Scan Rate function by pressing 4AUTO SCAN5 4SCAN RATE5 Use the right hand knob to set the scan rate to the 1 positio...

Page 103: ... the SAVE and RECALL functions 5 Verify the Save and Recall functions by pressing 4RECALL5 Adjust the right hand knob until 0 is displayed 6 Press 4ENTER5 The display will change to 500 500 500 500 7 Save these values by pressing 4SAVE5 Adjust the right hand knob until SAVE 1 is displayed 8 Press 4ENTER5 The display will change to 500 500 500 500 9 Use the front panel knobs to set each paddle posi...

Page 104: ...osition values in register 2 by pressing 4RECALL5 Adjust the right hand knob until the display reads RECALL 2 15 Press 4ENTER5 The display will change to 510 510 510 510 Verify the event timer 16 Select the Event Timer function by pressing 4AUTO SCAN5 The display will show a reading similar to 00 01 SCAN5 The rst half of the display is the event timer and will display the elapsed time of the scan ...

Page 105: ...ure for the test being performed when the problem appeared Are all the settings correct Can the problem be reproduced 7 Are the connectors clean See Cleaning and handling in Chapter 2 for more information about cleaning the connectors If the Agilent 11896A still fails you have two options Return the lightwave polarization controller to Agilent Technologies for repair If the lightwave polarization ...

Page 106: ...ightwave test set with an Agilent 8510 network analyzer an Agilent 8153 lightwave multimeter with source and power sensor modules Many other possibilities exist The basic requirements are an appropriate lightwave source and a compatible lightwave receiver Refer to the manuals provided with your lightwave test equipment for information on how to perform an insertion loss test As mentioned earlier i...

Page 107: ...with a source and power sensor module in conjunction with a lightwave coupler or an Agilent 81534 return loss module Many other possibilities exist The basic requirements are an appropriate lightwave source a compatible lightwave receiver and a compatible lightwave coupler Refer to the manuals provided with your lightwave test equipment for information on how to perform a return loss test As menti...

Page 108: ...before returning your instrument for service Any special arrangements for the instrument can be discussed at this time This will help the Agilent Technologies service o ce repair and return your instrument as quickly as possible Packaging The original shipping containers should be used If the original materials were not retained identical packaging materials are available through any Agilent Techn...

Page 109: ...em Whether problem is constant or intermittent Whether instrument is temperature sensitive Whether instrument is vibration sensitive Instrument settings required to reproduce the problem Error codes Performance data Company name and return address Name and phone number of technical contact person Model number of returned instrument Full serial number of returned instrument List of any accessories ...

Page 110: ...r packing material and strong enough to accommodate the weight of the instrument Surround the equipment with 3 to 4 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 D 240 Air CapTM from Sealed Air Corporation Commerce California 90001 Air Cap looks like a plastic sheet lled with air bubbles Use ...

Page 111: ... or to order replacement parts contact the nearest Agilent Technologies Sales and Service O ce In any correspondence or telephone conversation refer to the instrument by its model number serial number and option designation Before returning an instrument for service call the Agilent Technologies Instrument Support Center at 800 403 0801 visit the Test and Measurement Web Sites by Country page at h...

Page 112: ...19 Denmark 45 99 12 88 Finland 358 10 855 2360 France 01 69 82 66 66 Germany 0180 524 6330 India 080 34 35788 Italy 39 02 9212 2701 Ireland 01 615 8222 Japan 81 426 56 7832 Korea 82 2 3770 0419 Mexico 5 258 4826 Netherlands 020 547 6463 Norway 22 73 57 59 Russia 7 095 797 3930 Spain 34 91 631 1213 Sweden 08 5064 8700 Switzerland 01 735 7200 United Kingdom 01 344 366666 United States and Canada 800...

Page 113: ...you obtain accurate service information Refer to Serial Numbers in Chapter 1 for more information Safety considerations Before servicing this lightwave polarization controller familiarize yourself with the safety markings on the instrument and the safety instructions in this manual This instrument has been manufactured and tested according to international safety standards To ensure safe operation...

Page 114: ...er without a protective ground conductor If you are using an autotransformer make sure its common terminal is connected to the protective ground conductor of its power source outlet socket Reliability considerations The lightwave polarization controller input circuitry can be damaged by power levels that exceed the maximum safe input level speci cations Refer to Speci cations and Characteristics i...

Page 115: ...0 1615 Description Suhner P N Suhner connector removal tool 74Z 0 0 225 Adjustment procedure The only adjustment for the Agilent 11896A is the 5 7 Vdc voltage supply To adjust the power supply use an Agilent 3456A digital multimeter or equivalent to measure the dc output voltage at the power supply terminals red and black wires on connector If the dc output voltage is not within tolerance 5 00 Vdc...

Page 116: ...ocation of the assembly level replaceable parts Refer to Table 5 3 for a list of the part numbers of the replaceable assemblies and parts To replace the front panel assembly 1 Remove the machine screw on the rear of the handle 2 Remove the top cover 3 Gently unplug the three connectors attached to the polarization assembly Take care not to bend the pins 4 Remove the ribbon cable from the rear of t...

Page 117: ...To replace the power supply 1 Remove the machine screw on the rear of the handle 2 Remove the top cover 3 Remove the four screws from the bottom panel using the small Torx driver 4 Remove the bottom panel 5 Gently unplug the cables and front panel connectors from the power supply assembly 6 Remove the four screws securing the power supply assembly to the baseplate using the small Torx driver To re...

Page 118: ...t ordering information To order an assembly or mechanical part listed in this chapter quote the Agilent Technologies part number and indicate the quantity required To order a part that is not listed include the following information with the order lightwave polarization controller model number lightwave polarization controller serial number Description of where the part is located what it looks li...

Page 119: ... your local Agilent Technologies o ce Direct phone order system Within the USA a phone order system is available for regular and hotline replacement parts service A toll free phone number is available and Mastercard and Visa are accepted Regular orders The toll free phone number 800 227 8164 is available Monday through Friday 6 am to 5 pm Paci c time Regular orders have a 4 day delivery time Hotli...

Page 120: ...11896A assembly level replaceable parts Table 5 3 Assembly Level Replaceable Parts Index Number Agilent Part Number Description 1 Agilent 11051 REAR PANEL ASSY 2 Agilent 11052 FRONT PANEL ASSY 3 Agilent 11053 OPTICAL MODULE 4 Agilent 28000 POWER SUPPLY 5 21 ...

Page 121: ...Veri cation and Service Information ...

Page 122: ...A Choosing the Scan Rate and Measurement Time ...

Page 123: ...i 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 When T 20 ms a scan rate of 5 is a good choice A xed measurement time is su cient for devices with a PDL of 3 dB A measurement time of 10 sec is su cient to make PDL measurements with an accuracy of 65 T 2...

Page 124: ... 11896A are shown below Sweep times are in the range of 1 to 5 seconds Wavelength range 1250 1600 nm Reference level 050 dBm Resolution bandwidth 10 nm Wavelength span 100 350 nm Video bandwidth 30 300 Hz It is best to use scan rate 1 for swept wavelength PDL measurments because each sweep of the optical spectrum analyzer is of essentially a single polarization A total measurement time of ve minut...

Page 125: ...s during its averaging time and the polarization dependent responsivity PDR of the detector is reduced or eliminated A detector averaging time of two seconds is su cient to reduce the detector PDR by a factor of ten For example a detector with an averaging time of two seconds and a 0 020 dB PDR with no depolarizer has a 0 002 dB PDR when preceeded with the Agilent 11896A using scan rate 8 Averagin...

Page 126: ...B Measurement Considerations ...

Page 127: ...ion 010 also depends on which connector family is used The insertion loss of the Agilent 11896A versions having connectors will measure approximately 2 0 dB when using clean undamaged FC PC connectors N O T E Even minor damage or contamination to the connector faces will result in a signi cant increase in insertion loss therefore insertion loss is listed in Table 1 1 as a characteristic non warran...

Page 128: ...of the Agilent 11896A versions having connectors will measure approximately 60 02 dB when using clean undamaged FC PC connectors N O T E Even minor damage or contamination to the connector faces will result in a signi cant increase in insertion loss therefore insertion loss is listed in Table 1 1 as a characteristic non warranted performance parameter Optical return loss On the Agilent 11896A stan...

Page 129: ...larization A speci c extreme example is shown in Figure B 1 The ratio of the maximum power to the minimum power that can be coupled through the second polarizer is the extinction ratio In the Agilent 11896A the extinction ratio is determined by the angular resolution 60 18 degrees of the paddles This assumes the degree of polarization of the input signal to the Agilent 11896A approaches 100 and th...

Page 130: ...paddle positions The settling time is approximately proportional to the maximum rotation angle through which any paddle must travel Paddle rotation rates The four paddles in the polarization controller each rotate so all states of polarization are generated or scanned in a random fashion There are eight scan rates where rate 1 scans most slowly and rate 8 scans most quickly Nominal quarter wave pl...

Page 131: ...Measurement Considerations ...

Page 132: ...Index ...

Page 133: ...g 5 10 bus command device clear DCL 4 18 interface clear IFC 4 18 C calibration recommended interval 1 11 certi cation information iii changing the GPIB address 4 3 check digit 5 19 checking the fuse 2 4 cleaning of connectors adapters 2 11 13 CLS Clear Status 4 19 combining commands 4 8 command instructions 4 6 command mode operation 4 15 commands common 4 19 26 instrument speci c 4 27 34 output ...

Page 134: ...speci cations 1 12 direct mail order system 5 20 direct phone order system 5 20 display screen 3 4 duplicate mnemonics 4 9 E electrostatic discharge ESD 1 15 error codes on front panel display 3 5 error messages 4 33 ESD protection 1 15 5 15 reducing damage caused by ESD 1 17 static safe accessories 1 17 static safe work station 1 15 ESE Event Status Enable 4 20 ESR Event Status Register 4 21 even...

Page 135: ...2 insertion loss 1 12 2 9 B 2 optical performance 2 17 paddle position B 3 veri cation 5 7 instruction header 4 6 instructions command query 4 6 instrument address 4 17 con guration 1 4 speci c commands 4 27 34 state 3 10 instrument state keys 3 4 interface clear IFC command 4 18 interface select code 4 17 ISO IEC conformity 1 13 L lightwave connector care 2 9 14 local command 4 18 local function ...

Page 136: ... ordering information 5 19 PDL measurement polarization dependent 1 5 single wavelength 1 5 3 7 A 2 single wavelength max min 1 8 swept wavelength 1 6 A 3 wavelength scanning 3 7 performance speci cations 1 12 physical speci cations 1 12 polarization adjustability 1 10 adjustment keys 3 4 assembly replacement 5 18 controller accessories 2 3 extinction ratio 1 12 states 3 9 turning on the controlle...

Page 137: ... programming 3 7 combining commands 4 8 command query instructions 4 6 common command header 4 8 compound command header 4 8 de ned 4 2 18 device address 4 5 duplicate mnemonics 4 9 header types 4 7 initialization 4 14 instruction header 4 6 multiple program command query 4 13 numeric program data 4 12 output command 4 5 output queue 4 10 program data 4 7 program data syntax 4 12 program header 4 ...

Page 138: ...ted device clear 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 materials 2 3 5 9 preparation procedure 5 10 simple command header 4 7 single wavelength max min PDL measurement 1 8 measurement tim...

Page 139: ...age temperature 1 12 swept wavelength measurement time A 3 PDL measurement 1 6 scan rate A 3 SYSTem ERRor 4 33 SYSTem VERSion 4 34 T torque requirements 2 15 TST Test 4 26 turning on the polarization controller 2 8 V veri cation check 5 3 failure 5 6 verifying event timer 5 5 insertion loss 5 7 local function 5 4 recall function 5 4 return loss 5 8 save function 5 4 scan rate function 5 3 speci ca...

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