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1. sseseseseeeeeeeeeeneeeennn nne 13 Returning Shipments to JDS Uniphase ssseeeeseeseeessseee 14 Cleaning GOT INE GUS ae E E t o DT EE 14 Connecting and Setting the GPIB Interface essseeeesecsseeeeeeere 15 Connecting the RS232 Interface ccccccccceeeeeeeeeeeeneceeeeeeeeeeesenaaaaeeeeeeeeeeesensnaaaaeeenees 16 Checking Optional Connections dms 17 Operating and Maintenance Instructions eeeeeeeeeeeeeeeeeeeeeee enne nnne 18 Front PANG lis ee T 18 Operating OVE cuesesscetetitetit een net eR OPSRER eid rbre iss tat stenesaraiaid DIRE rD EMI UR Fate R EU DR EUR ta 18 Status LEDS E 19 Connector FANG lhecicjasiexescenneweiacenmieccsveetore denmark icxeteeiaqasonererwiedtelcieseb enteeiae 19 Rear Panel t th ERA 19 Setting Operating Mode and Using the Attenuator eeeeeeeesssessessssss 20 Turning the Beam Block On OF Off iuste n rcs ark o verra i Pob R vinea Ese uiueuiubE 21 SD000257 Rev H May 2000 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Setting the Calibration Wavelength esseeeeseseseeseeeeeeeeeee nennen 21 Setting the User Slope qe m 22 Optimizing the Calibration Wavelength eseseeem 22
2. The non volatile data saved by the command SAV has been lost Self test failed The device failed a self test Queue overflow The error queue has overflowed and an error has occurred that cannot be recorded A query error was detected but the parser cannot be more specific Query interrupted Query unterminated An unterminated error occurred for example a new program message was sent before the response to a previous query was read Programming Guide 62 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Query deadlocked The device was deadlocked Both the input buffer and output queue are full and the attenuator is unable to continue Undefined error number An undefined error occurred SCPI Command Tree All commands other than the IEEE 488 2 common commands are listed in Table 9 The following abbreviations are used in the Command Status column e SC SCPI confirmed command e SA SCPl approved command e N command is neither SCPI confirmed nor approved Table 9 SCPI Commands Command Parameters Response Command BENE ET MENFE EE ee ee a NUM cue eee e eS a i E BRIGhtness mw we 1 LL mee W L8 anew TE Numeric Value 0 00 100 007 SC ATTenuation MAX MIN DEF NRf 0 007 100 007 SC ATTenuation aowe wem L5 awe ELE ELO unos f LO or p numea 39 o
3. 48 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e Boolean 0O 1 ON OFF Any other numeric value sent is rounded to the nearest integer If the resulting integer is anything but O it is interpreted as 1 e Character A character string that contains no more than 12 characters Each character in the string must be either an uppercase or a lowercase letter a digit 0 to 9 or an underscore e String Any character string The characters in the string can be any ASCII character and the string can be of any length unless otherwise specified in the command table In order for the attenuator to recognize a single or double quotation mark as part of the string and not as the end of the string two sequential single quotation marks or two sequential double quotation marks are used to represent a single quotation mark or a double quotation mark respectively e Non Decimal Numeric Any binary octal or hex value where the non decimal numeric values xxxx are preceded by the type T for example Txxxx T is defined as follows Octal followed by q or Q Hex followed by h or H Binary st followed by b or B The value xxxx following the type must be less than the decimal value 2 and must conform to the following rules for each type Octal values can only contain the numeric characters 0 to 7 Hex values can only contain the numer
4. Function Sets the bits in the service request enable register The numeric value is rounded to the nearest integer and converted to a binary number The bits of the register are set to match the bit values of the binary number SRE 216 sets the service request enable register bits to 11011000 Service Request Enable Query Function Returns the contents of the service request enable register as an integer that when converted to a binary number represents the bit values of the register Example SRE returns 195 if the service request enable register is set to 11000011 Read Status Byte Query Function Returns the contents of the status byte register as an integer that when converted to a binary number represents the bit values of the register The bit value for bit 6 of the register is the MSS bit value not the RQS bit value STB returns 170 if the status byte register is set to 10101010 Self Test Query Function Initiates a self test of the attenuator and returns 0 if the attenuator passes the self test or 1 if it fails Example TST Programming Guide 69 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com WAI Command Prevents the attenuator from executing any further commands or queries until all pending operations have been completed Example INP ATT 10 WAI INP OFF prevents the attenuator from reading the offset until it has co
5. A rtisan Artisan Technology Group is your source for quality TecmoogyGroup new and certified used pre owned equipment FAST SHIPPING AND SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT DELIVERY Experienced engineers and technicians on staff Sell your excess underutilized and idle used equipment TENS OF THOUSANDS OF at our full service in house repair center We also offer credit for buy backs and trade ins IN STOCK ITEMS www artisantg com WeBuyEquipment EQUIPMENT DEMOS HUNDREDS OF InstraV ea REMOTE INSPECTION LOOKING FOR MORE INFORMATION MANUFACTURERS Remotely inspect equipment before purchasing with Visit us on the web at www artisantg com 7 for more our interactive website at www instraview com 7 information on price quotations drivers technical LEASING MONTHLY specifications manuals and documentation RENTALS ITAR CERTIFIED yop aed Contact us 888 88 SOURCE sales artisantg com www artisantg com HA9 SERIES EXTENDED RANGE PROGRAMMABLE OPTICAL ATTENUATOR User s Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com JDS Uniphase Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Contents Safety Information Instructions and Symbols cese 1 rci sidilareican aie MP ENT NAE 1 RASS AMON ciep tou iai etree a sere ceca cp dtes a a uter dd icd 1 D
6. CSB Clear Status Byte Clears or resets the status byte CLR Clear SRQ Mask Register Clears the SRQ mask register see the Status Reporting and Service Request Control section i This command is inactive and serves only to maintain the compatibility of the attenuator to the HP 8157A attenuator Programming Guide 35 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com HA9 HPM Query Commands D Beam Block Status Returns the on off status of the beam block 0 beam block off 1 beam block on WVL Calibration Wavelength Returns the calibration wavelength WVL returns the current calibration wavelength WVL MIN returns the minimum calibration wavelength WVL MAX returns the maximum calibration wavelength SLP Slope User Value Returns the user slope SLP returns the current user slope SLP MIN returns the minimum user slope SLP MAX return the maximum user slope USER Slope Control Returns the method by which the attenuator determines the slope of the attenuation 0 calibration wavelength 1 user slope DISP Display Mode Returns the display mode of the attenuator 0 ATT mode 1 PWR mode Programming Guide 36 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Display Offset ATT Mode Returns the display offset in ATT mode CAL returns the current display offset e CAL MI
7. Offset This command also accepts the parameters MIN MAX and DEF The minimum total attenuation is the total attenuation at which the actual attenuation is 0 dB The maximum total attenuation is the total attenuation at which the actual attenuation is 30 dB The default total attenuation is the same as the minimum attenuation Example INP OFFS 30 INP ATT 40 sets the total attenuation to 40 dB and the actual attenuation to 10 dB for example 40 dB 30 dB 10 dB INPut ATTenuation INPut ATTenuation lt space gt MAX MIN DEF Function Returns the current total attenuation in dB The total attenuation is the total of the actual attenuation and the offset Attis m Attactual Offset This query also accepts the parameters MIN MAX and DEF The minimum maximum or default value for the total attenuation at the current offset setting is returned of the HA9 wide unit Example INP ATT MAX returns the current offset plus 100 dB the maximum actual attenuation of the standard HA9 unit or 60 dB the maximum actual attenuation Programming Guide 71 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INPut LCMode INPut LCMode space lt boolean gt Sets the process by which the wavelength calibration is implemented when the wavelength is changed A boolean value of 1 or ON activates LCM mode In LCM mode the total attenuation remains fixed when the
8. Programming Guide 72 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INPut OFFSet Syntax INPut OFFSet lt space gt lt MIN MAX DEF gt Function Returns the current setting of the display offset The query accepts the parameters MIN MAX and DEF to return the minimum maximum or default value respectively for the display attenuation at the current offset setting Example INP OFFS 16 OFF returns 16 INP OFFS MIN returns 0 INPut OFFSet DISPlay Syntax INPut OFFSet DISPlay Function Sets the display offset so that the total attenuation is 0 dB Offsetnew Atti D Offsetoig Attact Example INP OFFS DISP sets the offset to 20 dB if the previous total attenuation was 30 dB and the previous offset was 10 dB INPut WAVelength Syntax INPut WAVelength space numeric value lt suffix gt Function Sets the calibration wavelength of the attenuator Because the calibration wavelength is used to account for the wavelength dependence of the attenuation set the calibration wavelength as close as possible to the source wavelength This command also accepts the parameters MIN MAX and DEF The minimum wavelength is 1200 nm the maximum wavelength is 1700 nm and the default wavelength is 1310 nm INP WAV 1550 nm INPut WAVelength Syntax INPut WAVelength lt space gt lt MAX MIN DEF gt Function Returns the current setting of the
9. SYSTem ERRor SYSTem ERRor Function Returns the next error message in the error queue Because the error queue is an FIFO queue the error returned is the oldest unread error The error message consists of an error number followed by an error message for example 0 No Error See the Error Queue section for a list of error numbers and their associated messages SYST ERR po itt see RN RN Syntax SYSTemVERSion sss VERSion Function Returns the formatted numeric value corresponding to the SCPI version number to which the attenuator aia S QM Example SYST VERS returns 1995 00 VERS returns 1995 0 User Commands UCALibration USRMode UCALibration USRMode space boolean Sets user mode on or off A boolean value of 1 or ON turns user mode on and the HA9 uses the current user slope instead of the factory set slope A boolean value of 0 or OFF turns user mode off and the HA9 uses the factory set slope Example UCAL USRM ON sets user mode to ON EEUU Syntax UCALibration USRMode Returns the current setting of user mode that is returns 1 if user mode is on and EE if user mode is off UCAL USRM OFF USRM returns 0 Programming Guide 80 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com UCALibration SLOPe UCALibration SLOPe space numeric value gt Sets the user slope The slope of the attenuator can b
10. Sets the bits in the questionable enable register The NRf value is rounded to the nearest integer and converted to a binary number The bits of the register are set to match the bit values of the binary number STAT QUES ENAB 32 8 sets bit 0 and bit 5 of the questionable enable register to 1 STATus po Syntax STATus QUEStionable ENABle Function Returns the contents of the questionable event enable register as an integer that when converted to a binary number represents the bit values of the register STAT QUES ENAB 23 ENAB retums 23 STATus Enc esis Syntax STATus QUEStionable EVENT Function Returns the contents of the questionable event register as an integer that when converted to a binary number represents the bit values of the register STAT QUES EVENT Programming Guide 78 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com STATus QUEStionable NTRansition STATus QUEStionable NTRansition space lt NRf gt Function Sets the bits of the questionable negative transition register The NRf value is rounded to the closest integer and converted to a binary number The bits of the register are set to match the bits of the binary number Example STAT QUES NTR 256 sets the bits of the questionable negative transition register to 0000000011111111 STATus QUEStionable NTRansition Syntax STATus QUEStionable NTRansi
11. DDE QYE ROS oPC 7 5 4 3 2 1 0 STANDARD EVENT STATUS ENABLE REGISTER TTT Ht on OUTPUT QUEUE Figure 14 Status Report Model Programming Guide 53 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Status Byte Register The status byte register contains the summary bits for each of the structures implemented in the attenuator and either the master summary bit MSB or the request for service bit RQS Status Byte Register Bio Bii B2 Bis Bta Bis Bio BR7 not not not questionable message event request for operation used used used summary available summary Service summary QSB MAV ESB or OSB master summary Read with Serial polling STB Written to with Cannot be written to Cleared by CLS common command e BitO is not used e Bit 1 is not used e Bit2 is not used e Bit 3 questionable summary is the summary bit for questionable status structure It is set if any bit in the questionable event status register is set while the corresponding bit in the questionable event enable register is set e Bit 4 message available is set to 1 when a response message is available in the output queue e Bit 5 event summary bit is the summary bit for the standard event status structure The ESB summary message bit is set if any bit in the standard event status register is set while its corresponding in the standard eve
12. Dimensions WxHxD 21 2 x 8 9 x 35 5 cm 19 inch 48 26 cm 2U high 1 2 rack width compatible with HP 8156A attenuator rack mount Wei Humidity maximum 90 RH up to 40 C decreasing 5 per C from 40 to 60 C General Information and Specifications 11 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Getting Started The HA9 Series Extended Range Programmable Optical Attenuator consists of the attenuator unit an AC power cord rack mount kit and HA9 LabVIEW software Before Initializing and Operating the Unit MI Inspect the unit for any signs of damage VI Read the users manual thoroughly and become familiar with all safety symbols and instructions to ensure that the unit is operated and maintained safely Initial Inspection Warning To avoid electrical shock do not initialize or operate the unit if it bears any sign of damage to any portion of its exterior surface such as the outer cover or panels Check that the unit and contents are complete 1 Wear an anti static wrist strap and work in an electrostatic discharge ESD controlled area 2 Inspect the shipping container for any indication of excessive shock to the contents and inspect the contents to ensure that the shipment is complete 3 Inspect the unit for structural damage that can have occurred during shipping 4 Connect the unit to a power source using the AC power cord p
13. space lt NRf gt Function Sets the bits in the operation enable register The NRf value is rounded to the nearest integer and converted to a binary number The bits of the register are set to match the bit values of the binary number Example STAT OPER ENAB 32 8 sets bit 0 and bit 5 of the operation enable register to 1 STATus OPERation ENABle Syntax STATus OPERation ENABle Function Returns the contents of the operation event enable register as an integer that when converted to a binary number represents the bit values of the register Example STAT OPER ENAB 23 ENAB returns 23 STATus OPERation EVENT Syntax STATus OPERation EVENT Function Returns the contents of the operation event register as an integer that when converted to a binary number represents the bit values of the register Example STAT OPER EVENT STATus OPERation NTRansition Syntax STATus OPERation NTRansition space lt NRf gt Function Sets the bits of the operation negative transition register The NHf value is rounded to the closest integer and converted to a binary number The bits of the register are set to match the bits of the binary number Example STAT OPER NTR 256 sets the bits of the operation negative transition register to 0000000011111111 STATus OPERation NTRansition Syntax STATus OPEReration NTRansition Function Returns the contents of the operation negative transition register as an integer that
14. INPUT 2 CONDREG LOOP UNTIL CONDREG AND 2 2 FOR J 1 TO 10000 NEXT wait for power meter to settle GOSUB METER P1 POWER PRINT 1 OUTPUT 05 INP ATT 40 change attenuation setting DO wait in loop until attenuator settles PRINT 1 OUTPUT 05 STAT OPER EVENT PRINT 1 ENTER 05 INPUT 2 CONDREG LOOP UNTIL CONDREG AND 2 2 FOR J 1 TO 10000 NEXT wait for power meter to settle GOSUB METER P2 POWER SLOPE P1 P2 30 calculate user slope PRINT 1 OUTPUT 05 UCAL SLOP SLOPE set user slope PRINT 1 OUTPUT 05 UCAL USRM ON INP ATT 0 OFFS 0 PRINT 1 OUTPUT 05 0UTP APM ON POW P2 dBm put attenuator in absolute power mode and set power The HA9 attenuator should now match the power meter The power can now be changed using the PWR command END METER This section contains the procedure for reading the power meter It is dependent on the particular meter you are using therefore the appropriate terminating characters have to be set The main program expects the power to be returned in the variable POWER RETURN SCPI Command Set The GPIB interface of the attenuator conforms to the ANSI IEEE standards 488 1 1987 and 488 2 1987 The RS232 interface conforms to ANSI IEEE standard 488 2 1987 where applicable The common commands are defined in ANSI IEEE 488 2 All other commands conform to the SCPI command language version 1995 0 Programming Guide 45 Arti
15. Programming Guide 57 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Operation and Questionable Negative Transition Registers If a bit in the negative transition register is set then a negative transition a transition from 1to 0 in the associated bit in the condition register causes the associated bit in the event register to be set Operation Negative Transition Register Read with STATus OPERation NTRansition query Written to with STATus OPERation NTRansition command Cleared by Power on Input Queue The input queue of the attenuator is a first in first out FIFO queue and is 100 bytes long Data bytes received from the controller are placed in the input queue in the order that they are received When a full message unit is received it is transferred to the parser If the input queue becomes full while the GPIB is being used the data acknowledge signal DAQ is not sent to the GPIB controller until a character is transferred from the input buffer to the parser This ensures that no bytes in the program message are lost The RS232 interface has no DAQ signal and therefore cannot be signaled when the input buffer is full If a new program message is received before the response to a query in a previous message is read the output queue is cleared MAV is set false and the query error bit is set This error is also referred to as an unterminated error Programmi
16. SOURCE www artisantg com Querying Status This example queries and displays the current attenuation setting OPEN COM2 1200 N 8 1 FOR RANDOM AS 3 PRINT 83 ATT INPUT 3 A PRINT A END Reading the Status Register The serial polling function is not supported on any RS232C interface but the STB command can be used to query the status register because it performs the same function as serial polling This example changes the attenuation setting and reads the status register continuously until the output has settled OPEN COM2 1200 N 8 1 FOR RANDOM AS 3 PRINT 3 CSB clear status register PRINT 8 ATT 40 DO loop until motor settles PRINT 8 STB INPUT 3 SR1 LOOP UNTIL SR1 AND 4 4 PRINT SR1 END Learn Query LRN This example demonstrates the use of the query Learn OPEN COM2 1200 N 8 1 FOR RANDOM AS 3 PRINT 3 LRN INPUT 3 fiber block srq_mask cal atten wave The above variables can be saved in a data file before quitting the program and then later read back and used to restore the attenuator to the same state in ATT mode like this PRINT S WVL wave CAL cal ATT atten D block Attenuation mode settings are now restored END HA9 and HPM Command Sets Remote control operation and query commands to the attenuator can be sent via the GPIB or the RS232 interface Programming Guide 32 Artisan Technology Group Quality Instrumentation Guaranteed 88
17. any maintenance or repair procedure when the unit is opened and connected to a power source Repairs are to be carried out only by a qualified professional Do not attempt any adjustment maintenance or repair procedure to the unit s internal mechanism if immediate first aid is not accessible Disconnect the power cord from the unit before adding or removing any components Operating the unit in the presence of flammable gases or fumes is extremely hazardous Do not perform any operating or maintenance procedure that is not described in the user s manual Some of the unit s capacitors can be charged even when the unit is not connected to the power source Safety 3 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Safety Symbols The following symbols and messages can be marked on the unit Table 1 Observe all safety instructions that are associated with a symbol Table 1 Safety Symbols Laser safety See the user s manual for instructions on handling and operating A the unit safely AA See the users manual for instructions on handling and operating the unit safely y Electrostatic discharge ESD See the users manual for instructions on A handling and operating the unit safely OL Frame or chassis terminal for electrical grounding within the unit EN Protective conductor terminal for electrical grounding to the earth WARNING The procedure can res
18. atten D block Attenutor settings are now restored in ATT mode END Sending Queries This example queries the attenuation and the state of the beam block OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 RESET PRINT 1 GPIBEOS IN LF setting terminating characters to LF PRINT 1 GPIBEOS OUT LF DIM RESPONSE AS STRING Set attenuation to 20 and the state of the beam block to 0 this turns the beam block on PRINT 1 OUTPUT 05 INP ATT 20 OUTP STAT 0 Query device PRINT 1 OUTPUT 05 INP ATT OUTP STAT PRINT 1 ENTER 05 INPUT 2 RESPONSE PRINT RESPONSE END 20 0000 0 is displayed on the screen Setting the User Slope This example demonstrates setting the user slope to match the HA9 attenuator to a power meter It is not specific to a particular power meter OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 RESET PRINT 1 GPIBEOS IN LF setting terminating characters to LF PRINT 1 GPIBEOS OUT LF PRINT 1 OUTPUT 05 RST PRINT 1 OUTPUT 05 UCAL USRM OFF PRINT 1 OUTPUT 05 STAT OPER NTR 2 PRINT 1 OUTPUT 05 INP ATT 10 change attenuation setting DO wait in loop until attenuator settles PRINT 1 OUTPUT 05 STAT OPER EVENT Programming Guide 44 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com PRINT 1 ENTER 05
19. calibration wavelength in meters This query also accepts the parameters MIN MAX and DEF returning the minimum maximum or default value respectively for the calibration wavelength INP WAV 1300 nm WAV returns 1 3e 06 Programming Guide 73 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com OUTPut Commands p APMode Syntax OUTPut APMode space boolean Function Sets whether the actual attenuation of the attenuator is set by changing the total attenuation or by changing the through power When absolute power mode is set to ON the actual attenuation is set by setting the through power rather than the total attenuation The base through power otherwise referred to as the power mode offset is automatically set to the total attenuation when absolute power mode is activated Through PoWerpase AT Tiotal at apmode on ATT actual Offset This value differs from setting the power mode offset manually using the keypad because the attenuator is not set to power mode before the power mode offset is adjusted To match the display of the attenuator to that of a power meter adjust the offset until the attenuator display matches the power meter display then turn on the absolute power mode and set the through power as required The absolute power mode is turned off automatically when any of the following commands or their associated queries are received by
20. error code is also placed into the error queue The queue can be queried with ERR or LERR TST also sets bit 7 in the status register 0 self test passed 1 self test failed ERR Error Number Returns an error number if the self test operation fails 330 self test failed 0 no error occurred LERR Last Error Returns an error number from an error queue The queue can contain as many as five error numbers The first error read is the last error that occurred 000 error queue is empty OPC Input Buffer Returns the status of the input buffer 1 the input buffer is empty for example all commands have been executed 0 the input buffer is not empty for example commands are still pending IDN Identification Returns a string that identifies the manufacturer the HA9 model number the serial number or if unavailable and the firmware level for example JDS UNIPHASE HA9x 01 0 00 100 where x S for standard model and x L for wide model O0 Programming Guide 38 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Always returns 1 This command serves only to maintain the compatibility of the attenuator to the HP 8157A attenuator In HA and HP mode returns a 58 character string containing a summary of the current settings of the attenuator The string is formatted as follows Fiber setting four characters always returns 1 Output state
21. four characters 0 beam block off 1 beam block on SRQ mask eight characters Attenuation display offset 13 characters Attenuation 13 characters Wavelength 16 characters HA mode example 1 0 6 10 0000 22 0000 13000e 06 HP mode example F D 1 SRE 6 CAL 10 0000 ATT 22 0000 WVL 13000e 06 Status Reporting and Service Request Control The attenuator maintains three eight bit registers that are used for status reporting and enabling the GPIB service request interrupt e Condition register e Status register e SRQ mask register Condition Register The condition register monitors the current state of the attenuator mechanism Bit 2 is set to 1 when the attenuation is constant and to 0 when the attenuator mechanism is moving to a new setting The query CNB returns the value of the condition register When bit 2 is 1 CNB returns 4 ers ene ono mz oni owo po 0 o o o settes o o Status Register The status register records errors and other events that have occurred in the attenuator When an event occurs the attenuator status logic sets the corresponding bit The status register can be read at any time because the bits stay set until the register is read at least once Programming Guide 39 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Status Pen ae Bit7 7 self test service 285 EINEN 82 ENNM error request error av
22. is ready to read the offset value 3 Press the 0 dB key to set the display offset to 0 dB 4 To use an offset other than 0 dB press the A or W key to adjust the setting The OFFS status LED lights Setting the Display Offset in PWR Mode In Power mode the display offset is used to match the power displayed by the attenuator to a power meter reading in dBm To set the offset 1 Ensure that the attenuator is in PWR mode the display is in dBm If not in Power mode press the ATT PWR key The attenuator displays the output power including the offset for example DISP XX XX dBm 2 Press the OFFS key The key lamp lights to indicate that the attenuator is ready to read the offset value 3 Press the 0 dB key to set the display offset to 0 dB 4 To use an offset other than 0 dB press the A or W key to adjust the setting The OFFS status LED lights Operating and Maintenance Instructions 23 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Setting the Power The attenuator has no internal power measurement capability but by using the display offset feature of the attenuator the display can be matched with the help of an external power meter To set the power 1 Ensure that the attenuator is set to PWR mode the display is in dBm 2 Press the A or W key to adjust the output power 3 Ensure that the source power and connection losses are stable during the calibr
23. only to a power outlet equipped with a protective earth contact Never connect to an extension cord that is not equipped with this feature Willfully interrupting the protective earth connection is prohibited Never look into the end of an optical cable connected to an optical output device that is operating Laser radiation is invisible and direct exposure can severely injure the human eye For more information see the user s manual of the laser source in use Turning off the power to the device does not always block the externally supplied radiation to the connector at the output of the unit Do not use the unit outdoors To prevent potential fire or shock hazard do not expose the unit to any source of excessive moisture Do not operate the unit when its covers or panels have been removed Do not interrupt the protective earth grounding Any such action can lead to a potential shock hazard that can result in serious personal injury Do not operate the unit if an interruption to the protective grounding is suspected In this case ensure that the unit remains inoperative Use only the type of fuse specified by the manufacturer as appropriate for this unit Do not use repaired fuses and avoid any situations that can short Safety 2 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com circuit the fuse Unless absolutely necessary do not attempt to adjust or perform
24. the attenuator e INP ATT e INP OFFS e INP OFFS DISP OUTP APM ON sets absolute power mode to ON po APMode Syntax OUTPut APMode Function Returns the current absolute power mode state for example returns 1 if absolute power mode is ON the actual attenuation is set by throughput and 0 if absolute power mode is OFF the actual attenuation is set by the total attenuation OUTP APM 1 APM returns 1 OUTPut DRIVer OUTPut DRIVer space lt boolean gt Function Sets the state of the 5 V output A boolean value of 1 or ON turns the 5 V output on A boolean value of 0 or OFF turns the 5 V ie eee ea off OUTP DRIV ON turns the 5 V OUTP DRIVONtumsthe5 V output on s on Programming Guide 74 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com OUTPut DRIVer OUTPut DRIVer Returns 1 if the 5 V output is on and O if the 5 V output is off OUTP DRIV OFF DRIV returns 0 Eu POWer Syntax OUTPut POWer lt space gt numeric value dBm Function Sets the through power of the attenuator The through power is used to set the actual attenuation of the attenuator This command also accepts the parameters MIN MAX and DEF The minimum through power is the through power for which the actual attenuation is 100 dB for the standard HA9 model and 60 dB for the HA9W wide model The maximum through power is the through power for
25. too long The suffix sent with the command was more than 12 characters long Character data error An error was detected in a character type parameter but the parser cannot be more specific Invalid character data An invalid character was detected in a character type parameter Character data too long A character type parameter contained more than 12 characters Execution error An execution error has occurred but the control block cannot be more specific Parameter error An error was detected in a parameter but the control block cannot be more specific i Settings conflict A valid parameter was received but it cannot be used due to the current state of the attenuator Data out of range A valid parameter type was received but it is out of range for the attenuator Too much data A block expression or string data type was too long for the attenuator to process Programming Guide 61 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Illegal parameter value A valid parameter type was received but it did not match any of the permitted values Hardware error A command cannot be executed due to a hardware error but the control block cannot be more specific Device specific error A device specific error occurred but more specific information is unavailable System error An instrument system error has occurred Save recall memory lost
26. when converted to a binary number represents the bit values of the register Example STAT OPER NTR 12 NTR returns 12 STATus OPERation PTRansition Syntax STATus OPERation PTRansition space lt NRf gt Function Sets the bits of the operation positive transition register The NHf value is rounded to the closest integer and converted to a binary number The bits of the register are set to match the bits of the binary number Programming Guide 77 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com STAT OPER PTR 255 sets the bits of the operation positive transition register to 000000001 1111110 Dr OPERation PTRansition Syntax STATus OPERation PTRansition Function Returns the contents of the operation positive transition register as an integer that when converted to a binary number represents the bit values of the register STAT OPER PTR 12 PTR retums 12 STATus Ceres Syntax STATus QUEStionable CONDition Function Returns the contents of the questionable condition register as an integer that when converted to a binary number represents the bit values of the register The attenuator only uses bit 1 of the register Bit 1 the settling bit is set when the attenuator is in the process of adjusting the actual attenuation STAT QUES COND STATus QUEStionable ENABle STATus QUEStionable ENABle space lt NRf gt Function
27. 0 to 1 a service request interrupt is generated and bit 6 in the status register is set The SRQ mask register can unmask more than one event at a time The first unmasked event to change from 0 to 1 causes an interrupt To acknowledge this interrupt the GPIB interface can be serial polled or the status register can be read with STB The first time the attenuator is serial polled after an SRQ is generated bit 6 is on Subsequent serial polling returns a value with bit 6 off Similarly STB returns the status register with the SRQ set but then the attenuator logic automatically clears the register As a result subsequent STB queries return 0 Programming Guide 40 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The SRQ mask register is cleared by powering up the attenuator by the CLR command or by the universal device clear command DC1 SRQ Mask Register mu see self test n a syntax message n a settled n a parameter error error available error GPIB Programming Examples This section provides programming examples for controlling the attenuator over the GPIB interface The examples were written in MS DOS Qbasic and run on a personal computer equipped with a National Instruments GPIB interface board with National Instruments Universal Language Interface drivers loaded The commands that control the GPIB are similar to Hewlett Packard HP Basic commands Most other co
28. 8 88 SOURCE www artisantg com Command Parser Rules Commands consist of a mnemonic for example WVL and if required a data parameter for example 1300NM The mnemonic and the parameter must be separated by at least one space Parameters can be entered in various formats For example 1300nm 1 303 6 mm and 0 0000013M are recognized as the same value Commands can be sent in uppercase or lowercase characters A command is contained in a message and messages can contain more than one command each one separated by a semicolon For example WVL 1300NM CAL 10dB ATT 50 dB CR lt LF gt contains three commands All GPIB commands must end with the terminating sequence CR lt LF gt if the active interface command set is HA9 or HPM All RS232 commands must end with the terminating sequence CR The input buffer of the attenuator can hold as many as 100 characters If the buffer becomes full the attenuator holds the handshaking line on the GPIB interface until space is available Similarly over the RS232 interface the attenuator sets the Clear To Send line low Any characters received after the line goes low are ignored Commands are executed as they are parsed consequently a command can be executed before the entire message in which it is contained is received The attenuator delays accepting new characters sent over the GPIB interface while the attenuator mechanism is moving but no data are lost The attenuato
29. 8 d 3J A j JJ JAA e Figure 1 HA9 Series Extended Range Programmable Attenuator The standard operating wavelength range of the HA9 attenuator is 1200 to 1700 nm An optional wide wavelength range of 750 to 1700 nm with reduced attenuation range is available Single mode HA9 attenuators with an analog option are specifically designed for use in demanding applications such as multichannel AM systems and high bit rate digital pulse code modulation PCM systems The HA9 attenuator has an SCPI HP 8156A compatible command set and can be controlled from either the front panel keypad or by parallel IEEE 488 1 or serial RS232 interfaces LabVIEW drivers are supplied to facilitate remote control For information on using the LabVIEW drivers see the LabVIEW Instrument Driver for HA1 HA3 HA9 and HA11 Attenuators User s Manual document SD000322 The optics of the HA9 attenuator are bidirectional and therefore either fiber port can be used as the input When the HA9 attenuator is used at high attenuation settings the output fiber or cable must be shielded to prevent erroneous readings caused by ambient light pickup LabVIEW is a registered trademark of National Instruments Corporation General Information and Specifications 7 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com When combined with a light source the attenuator can be used for EDFA t
30. C Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense These limits are designed to provide reasonable protection against harmful interference in a commercial installation The unit generates uses and radiates radio frequency energy and if not installed and used in accordance with instructions can cause harmful interference to radio communications Any user modification made to the unit voids the user s authority to operate the unit under the FCC rules If this unit is used in a residential setting resulting interference must be corrected by the user For more information see Title 47 of the Code of Federal Regulations at http www access gpo gov nara cfr cfr table search html CE Compliance The unit has been designed and tested to comply with directive 73 23 EEC and its subsequent amendments by the European Community EC or CE The directive relates to electrical equipment designed for use within certain voltage limits It ensures that electrical equipment is cons
31. EC mark shall also indicate conformity with the relevant requirements of those other Directives UL Compliance The unit complies with Underwriters Laboratories UL standard 1950 the Standard for Safety Information Technology Equipment The unit complies with Underwriters Laboratories UL standard 3101 1 Electrical Equipment for Laboratory Use Part 1 General Requirements UL is a registered trademark of Underwriters Laboratories Inc Safety 6 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com General Information and Specifications General Information This user s manual for the HA9 Series Extended Range Programmable Optical Attenuator contains complete operating instructions The HA9 Series Extended Range Programmable Optical Attenuator Figure 1 gives an extended attenuation range 100 dB and high resolution 0 01 dB for testing power meters and for general test and laboratory work The linear design of the HA9 attenuator combined with built in calibration and offset functions allows the user to match the display of the HA9 attenuator to an optical power meter over a wide power range This combination is useful in tests requiring control of the absolute optical power into a test device In addition a built in beam blocking switch allows fast access from any attenuation setting to infinite attenuation blocking attenuation is gt 110 dB TI 3930
32. Instructions 25 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Verifying Calibration To verify calibration 1 10 With the attenuator powered off O clean all optical connections before each connection with an alcohol soaked swab See the Cleaning Connectors section To avoid reflection induced source power changes ensure that the connector to the power meter has low reflection or that the source has an isolator Zero the power meter Connect the source to the attenuator and connect the attenuator to the power meter Figure 10 attenuator source power meter Figure 10 Wavelength Verification Setup Set the power switch on the attenuator to on and verify that both the attenuator and the power meter are set to the same wavelength as the source Ensure that the oo key LED is off Set the attenuator to zero and record the value displayed on the power meter Increase the attenuation in 1 dB steps until the attenuator reads 90 dB After each step record the value displayed on the attenuator and the value displayed on the power meter Apply the following formula to each reading attenuator reading 0 power reading power reading with the attenuator set to 0 If the resulting data indicates that the attenuator is no longer operating within the specifications stated in the Specifications section return the attenuator to the factory for recalibr
33. Instrumentation Guaranteed 888 88 SOURCE www artisantg com Table 7 RS232 Functions meses ms s ew mammmamay Dm s ow wem sa s The data protocol is permanently set to 1200 baud ASCII character code with eight bits per character one stop bit and no parity bit The serial port of the controlling computer must be configured with the same settings RS232 Programming Examples This section provides programming examples for controlling the attenuator over the RS232 interface The examples were written in MS DOS Qbasic and run on a personal computer equipped with a serial port COM port 2 of the computer must be designated as the serial port and must be connected to the attenuator Before using any of these examples ensure that the active interface command set is HAY The RS232 interface cannot receive an SRQ interrupt The RS232 commands that appear in this section do not always show the terminating sequence however it is implied Sending Commands This example sets the wavelength to 1300 nm and the attenuation to 20 dB These commands demonstrate the use of a variable in the statement that sends the attenuation command OPEN COM 2 1200 N 8 1 FOR RANDOM AS 3 PRINTZ3 WVL 1300e 9 m atten 20 PRINT S ATT atten dB END MS DOS is a registered trademark id Microsoft Corporation Programming Guide 31 Artisan Technology Group Quality Instrumentation Guaranteed 888 88
34. N returns the minimum display offset e CAL MAX returns the maximum display offset PCAL Display Offset PWR Mode Returns the display offset in PWR mode PCAL returns the current display offset e PCAL MIN returns the minimum display offset e PCAL MAX returns the maximum display offset Returns the optical power setting e PWR returns the current optical power setting e PWR MIN returns the minimum optical power setting at the current wavelength e PWR MAX returns the maximum optical power setting at the current wavelength If the HA9 attenuator is set at the minimum loss position PWR returns 101 dB Returns the attenuation of the attenuator e ATT returns the current attenuation ATT MIN returns 0 or the minimum attenuation setting at the current wavelength e ATT MAX returns 0 or the maximum attenuation setting at the current wavelength If the HA9 attenuator is set at the minimum loss position ATT returns 1 dB Returns the status of the driver e Oc driver is off e 1 driveris on Programming Guide 37 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com SRE Status Register Returns the contents of the status register as an integer CNB Condition Register Returns the contents of the condition register as an integer see the Status Reporting and Service Request Control section TST Self test Executes a self test operation and returns the result An
35. T AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 GPIBEOS IN CR LF PRINT 1 GPIBEOS OUT CR LF ON PEN GOSUB SPOLL enable SRQ interrupt PEN ON PRINT 1 OUTPUT 05 CSB SRE 4 clear status register and unmask settled bit in SRQ mask register PRINT 1 OUTPUT 05 ATT 45 change attenuation setting More code executed while attenuation set WHILE INKEY endless loop to simulate bigger program WEND ends when any key is pressed PEN OFF END SPOLL PRINT 1 SPOLL 05 serial poll the attenuator INPUT 2 sr read status register PRINT sr verify SRQ bit is set PRINT 1 SPOLL 05 serial poll again to verify SRQ bit is now cleared INPUT 2 sr read status register PRINT sr RETURN Learn Query LRN This example demonstrates the use of the Learn query OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 GPIBEOS IN CR LF PRINT 1 GPIBEOS OUT CR LF PRINT 1 OUTPUT 05 LRN send the learn query command PRINT 1 ENTER 05 INPUT 2 fiber block srq mask cal atten wave The above variables can be saved in a data file before quitting the program and then later read back and used to restore the attenuator to the same state in ATT mode Programming Guide 43 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Like this PRINT 1 OUTPUT 05 WVL wave CAL cal ATT
36. TION LOOKING FOR MORE INFORMATION MANUFACTURERS Remotely inspect equipment before purchasing with Visit us on the web at www artisantg com 7 for more our interactive website at www instraview com 7 information on price quotations drivers technical LEASING MONTHLY specifications manuals and documentation RENTALS ITAR CERTIFIED yop aed Contact us 888 88 SOURCE sales artisantg com www artisantg com
37. UT 05 INP ATT STRS ATTEN WAV STRS WAV NM END Querying Status This example queries and displays the current attenuation setting OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 GPIBEOS IN CR LF PRINT 1 GPIBEOS OUT CR LF PRINT 1 OUTPUT 05 ATT PRINT 1 ENTER 05 INPUT 2 A PRINT A END Serial Polling the Status Register This example changes the attenuation setting and reads the status register continuously until the output has settled OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 GPIBEOS IN CR LF PRINT 1 GPIBEOS OUT CR LF PRINT 1 OUTPUT 05 CSB clearing the status byte clears the settling bit PRINT 1 OUTPUT 05 ATT 0 3456e2 change the attenuation to 34 56 dB sr 0 initialize sr variable to enter the while loop DO loop until settled bit is true PRINT 1 SPOLL 05 serial poll the attenuator INPUT 2 sr LOOP UNTIL SR AND 4 4 PRINT sr print final value of sr END Programming Guide 42 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Generating a Service Request Interrupt A service request interrupt is generated when the attenuator completes changing the attenuation setting This example tests the service request interrupt function It unmasks the settled bit in the SRQ mask register and sends a new attenuation setting OPEN GPIBO FOR OUTPU
38. ailable error e Bit 7 self test error is set if a calibration error was detected after power up or after the self test query TST was executed At all other times it is O e Bit 6 service request is set when the interrupt request logic of the attenuator detects a reason to generate an SRQ on the GPIB e Bit 5 syntax error is set when the parser detects a syntax error in a command mnemonic e Bit 4 message available is set when a message is available in the output buffer Bit 2 settled is set when bit 2 in the condition register changes from 0 to 1 e Bit 0 parameter error is set when a parameter value is out of the range of the attenuator The status register can be read with the status register query STB or by serial polling the GPIB interface During power up the status register contains 0 and can be read only by serial polling After initial power up only bit 2 is set to 1 The clear status byte command CSB and the clear device command CLR clear the status register STB can be used to clear the status register only if bit 6 is on SRQ Mask Register The SRQ mask register unmasks specific events in the status register that generate a service request interrupt on the GPIB interface The SRQ mask command SRE writes to the SRQ mask register When a bit in the SRQ mask register is set to 1 the interrupt logic of the attenuator monitors the corresponding event bit in the status register When the bit changes from
39. ark FRAGILE on its surface 8 Always provide the model and serial number of the unit and if necessary the RMA number on any accompanying documentation 9 Ship the unit only to the address given at the beginning of this document Cleaning Connectors Caution e Connecting damaged or dirty fibers to the unit can damage the connectors on the unit Never force an optical connector Some connectors have a ceramic ferrule that can easily be broken Optical cable ends need to be cleaned before using them with the unit The following items are required for cleaning e Filtered compressed air or dusting gas for example Tech Spray Envi Ro Tech Duster 1671 gas available from http www techspray com 1671 htm Lint free pipe cleaners for example from 3M or lint free swab 3 3M is a trademark of 3M Getting Started 14 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e Lint free towels for example 10 x 10 cm or 4 x 4 in HydroSorb Ill wipers available from http www focenter com acctech hydrosobr_wipers htm e Optical grade isopropyl alcohol or optical grade 200 ethanol do not use rubbing alcohol which contains 30 water To clean the connectors 1 Blow the sleeve with filtered compressed air Figure 3 Sleeve ferrule Figure 3 Connector Cleaning connector type can vary m Apply optical grade isopropyl alcohol or optical grade ethanol do no
40. ation Recalibration is recommended every two years Operating and Maintenance Instructions 26 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Verifying Insertion Loss To verify insertion loss 1 Zero the power meter 2 Connect the source directly to the power meter by bypassing the attenuator and connecting the two jumpers or pigtails together Figure 11 attenuator source EH power meter Figure 11 Insertion Loss Verification Setup 3 Record the value displayed on the power meter 4 Connect the source to the attenuator and connect the attenuator to the power meter Figure 10 5 Set the attenuator to 0 dB e Record the value displayed on the power meter The difference between this reading and the reading taken in step 3 is the insertion loss If the resulting data indicates that the attenuator is no longer operating within the specifications stated in the Specifications section return the attenuator to the factory for recalibration Recalibration is recommended every two years Maintaining the Attenuator Clean the connector ends with a lint free tissue and alcohol before every mating See the Cleaning Connectors section Also clean the connectors inside the unit 1 Loosen the retaining screws of the connector panel 2 Pull the panel out carefully extending it no more than 10 cm 4 in from the body of the attenuator Figure 12 Operatin
41. ation procedures and subsequent device testing Controlling the Driver If the HA9 attenuator is equipped with a 1x2 switch the DRIVER key controls the switch state for example off Channel 1 on Channel 2 1 To activate the driver press the DRIVER key The key lamp lights 2 To deactivate the driver press the DRIVER key The key lamp turns off Resetting the Attenuator To reset the attenuator 1 Press the X key and hold it for three seconds The attenuator is reset to the following configuration wavelength 1310 nm attenuation 0dB mode ATT display offset 0 dB If the reset procedure fails the attenuator displays an error message Checking Attenuator Calibration The attenuator is factory calibrated but wavelength calibration and insertion loss can be verified Required Equipment The following equipment is required e Light source for the wavelength at which the calibration is being verified for example a 1550 nm source for calibration verification at 1550 nm Record the exact peak center wavelength of the source for future reference e Power meter that is accurate up to at least 90 dBm and has a resolution of at least 0 1 dB e Appropriate jumpers FC PC or FC APC as required Operating and Maintenance Instructions 24 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e Various connectors e Isolator optional Operating and Maintenance
42. b The query form of a command must end with a question mark for example the query form of INPUT ATT is INPUT ATT A command can be entered in either uppercase or lowercase characters Specifying the Command Path To use a command in the command tree the attenuator must know the full path to the command If the command is the first one in the program message the command header must contain the full path to the command Subsequent commands in the same program message are automatically referenced in the same path as the previous command unless the command header is preceded by a colon in which case the full path to the command must be included in the command header INPut OFFSet value DISPlay value WAVelength value The following program messages are valid Programming Guide 46 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INP OFFS 20 WAV 1200 NM INP OFFS 20 INP WAV 1200 NM INP OFFS DISP 20 Programming Guide 47 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The following program messages are not valid INP OFFS 20 INP WAV 1200 NM no colon before second command INP OFFS 20 DISP 1 DISP command at different level than OFFS INP OFFS DISP 1 WAV 1200 NM WAV command at different level than DISP Default Commands Default commands do not need to be explicitly included
43. can increase or decrease the calibration wavelength of the HA9 attenuator to find a better slope correction factor for the source in use The attenuator is optimized for low insertion loss at both 1300 and 1550 nm Typically the variation in insertion loss from 1200 to 1700 nm is x0 2 dB Setting the User Slope The slope of the attenuator can be matched to a power meter for a given source by optimizing the calibration wavelength or by storing a user slope Both procedures can be performed locally or remotely Set the user slope before setting the display offset and the attenuation Optimizing the Calibration Wavelength To optimize the calibration wavelength 1 Press and hold the key for three seconds The HA9 attenuator is reset that is the attenuation is set to O dB the operating mode is set to ATT and the display offset is set to 0 dB 2 Set the power meter to 0 dB 3 Press the A or W key to set the attenuation to 10 dB 4 Press the key 5 Press the A or W key to set the calibration wavelength to the source wavelength increasing or decreasing the calibration wavelength until the attenuation displayed on the front panel of the attenuator matches the power meter reading The attenuation on the HA9 attenuator can be set higher than 10 dB provided that the power meter remains linear Attenuation settings lower than 10 dB are not recommended Storing a User Slope To store a user slope 1 Press and hold the X key f
44. cator light on the key is on the beam block moves out of the beam thereby turning on the optical power from the attenuator 2 To turn the beam block on press the key The beam block is activated when the indicator light on the ee key is off the beam block remains in the beam thereby turning off the optical power from the attenuator Setting the Calibration Wavelength Set the calibration wavelength before setting the display offset and the attenuation For accurate output from the attenuator set the wavelength on the attenuator to match the source wavelength To calibrate the attenuator for a specific source wavelength 1 Press the A key The key lamp lights The attenuation or power setting YY YY and the calibration wavelength XXXX nm are displayed for example YY YY XXXX nm 2 Press the A or W key to adjust the calibration wavelength to the required resolution of 1 nm A change in the calibration wavelength automatically changes the attenuation or power setting displayed by the attenuator Operating and Maintenance Instructions 21 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 3 When the required wavelength setting is reached press ATT PWR to store the setting and return to the attenuation or power display A correction factor curve is adjusted for each attenuator to provide optimum performance with a laser diode source at 1300 and 1550 nm The user
45. controls a digit in the corresponding position displayed on the LCD except for wavelength setting Status LEDs The status LEDs are described in Table 5 Table 5 Status LEDs LED Desorption O OFFS Indicates that the unit is in Display Offset mode Indicates that the unit is in Remote mode All the front panel keys except LCL are locked out LOCK Indicates that the unit is in Local Lockout mode The function of the LCL key is disabled and all front panel keys are locked out ADDR Indicates that the GPIB interface is in Talk or Listen state Indicates that the unit interrupt logic has generated a service request interrupt on the GPIB interface Connector Panel Two fiberoptic connectors or cable feed throughs are mounted on a removable panel The HA9 attenuator with a built in splitter or switch has three fiberoptic connectors Rear Panel The back of the attenuator is shown in Figure 8 A USTED e e e MEASURING EQUIPMENT H AN ji z WARNING IEEE488 GPIB CONGUCTOH Mist amp CON Ae efie Figure 8 Back of the Attenuator Operating and Maintenance Instructions 19 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Setting Operating Mode and Using the Attenuator The attenuator functions in Attenuation ATT mode or in output Power PWR mode In ATT mode the attenuator displays attenuation in dB Normally the attenuation display
46. curs Standard Request Enable Register Read with SRE common query the value of bit 6 is always O Written to with SRE common command the value of bit 6 is always zero regardless of the value sent with the command Cleared by SRE common command with a parameter value of 0 Power on Standard Event Status Register Standard Event Status Register BiO Bii Bi2 Bts Bia Bits Bite Bi7 operatio request device execution command user power on n control dependent error error request PON complete RQC error EXE CME URQ OPC DDE Read with ESR common query Written to with Cannot be written to Cleared by ESR common query CLS common command Power on e Bit 0 operation complete is set in response to the OPC common command This bit is set when all operations are complete e Bit 1 request control is always set to 0 Bit 2 query error is set when a query error occurs for example an attempt is made to read the output queue when the output queue is empty or when the data in the output queue is lost e Bit 3 device dependent error is set by the attenuator to indicate that an error has occurred that is not a command error an execution error or a query error Programming Guide 55 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e Bit 4 execution error is set when an execution error is detected by the attenuat
47. e GPIB address and the command set 4 Press the ATT PWR key Until reset the settings are recalled by the attenuator on power up In the HA9 and HPM command sets the message terminating sequence is permanently set to CR lt LF gt Programming Guide 29 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com In SCPI mode the message terminating sequence is automatically set to lt LF gt Switching between Remote and Local Operation The attenuator is automatically placed in Remote mode as soon as a computer communicates with the attenuator via the GPIB or RS232 port using the SCPI or HA command set The REM status LED lights to indicate that the attenuator has transitioned to Remote mode and can accept commands from the GPIB or RS232 port and that all front panel keys except LCL are locked out The LCL key remains active to return the control back to front panel keys To exit Remote mode and return to Local mode 1 Press the LCL key The LCL key is disabled if the attenuator has been set to Local Lockout mode The REM LED is lit when the attenuator is in Remote mode GPIB Interface Functions The functions are listed in Table 6 Table 6 GPIB Functions IEEE 488 2 Function D Wemons EEE 00 2 Function repo paral pon no capabity RS232 Interface Functions The functions are listed in Table 7 Programming Guide 30 Artisan Technology Group Quality
48. e matched to a power meter for a given source by adjusting the user slope This command also accepts the parameters MIN MAX and DEF The minimum value for the slope is 0 5 the maximum value is 2 0 and the default value is 1 0 Example UCAL SLOP 1 75 UCALibration SLOPe UCALibration SLOPe lt space gt lt MAX MIN DEF gt Returns the current user slope setting This query also accepts the parameters MIN MAX and DEF returning the corresponding minimum maximum or default value for the user slope Example UCAL SLOP MAX SLOP retums 2 0 IEEE 488 2 Common Commands The commands are listed in Table 10 Table 10 IEEE Commands command Parameter Response MN wax N A N A N A N A NI NA NA NR NA NI A N A N A NA NA N A N A A A Programming Guide 81 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com A rtisan Artisan Technology Group is your source for quality TecmoogyGroup new and certified used pre owned equipment FAST SHIPPING AND SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT DELIVERY Experienced engineers and technicians on staff Sell your excess underutilized and idle used equipment TENS OF THOUSANDS OF at our full service in house repair center We also offer credit for buy backs and trade ins IN STOCK ITEMS www artisantg com WeBuyEquipment EQUIPMENT DEMOS HUNDREDS OF InstraV ea REMOTE INSPEC
49. ed on the front panel is relative to the O dB reference position of the attenuating optical filter inside the attenuator However the display offset feature of the attenuator can be used to account for insertion and connection losses and the adjusted attenuation value displayed In PWR mode the attenuator displays the optical output power in dBm The attenuator has no power measurement capability but using the calibration methods described in Setting the Calibration Wavelength and Setting the User Slope sections the user can match the power level displayed by the attenuator to an external power meter To power up the unit 1 2 Connect the attenuator to the AC power source using the AC power cord provided Set the power switch to I on and observe the power up sequence The attenuator always powers on in ATT mode All key lamps and status LEDs light The version number of the software is displayed briefly The calibration wavelength in nm XXXX and the attenuation YY YY dB are displayed for example XXXX YY YY dB The command set YYY the message terminating sequence CR lt LF gt or CR or lt LF gt TR and the GPIB address AD a number between 1 and 30 are also displayed An example is YYY TR AD The status of the beam block BLK and the attenuation in dB XX XX are displayed for example BLK XX XX If a malfunction is detected an error message is displayed If an offset setting was entered and used be
50. eeeeeuseeueeesuaeeeneaeeeaaeeenaaeees 81 For sales and service information contact JDS Uniphase or your local representative JDS Uniphase Corporation 570 West Hunt Club Road Nepean Ontario Canada K2G 5W8 Phone 613 727 1303 Fax 613 727 8284 E mail sales jdsunph com Website http www jdsunph com SD000257 Rev H May 2000 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Safety Information Instructions and Symbols Safety Information Classification The HA9 Series Extended Range Programmable Optical Attenuator consists of an exposed metal chassis that is connected directly to earth via a power cord and therefore is classified as a Class 1 instrument Class 1 refers to equipment relying on ground protection as a means of shock protection The following symbol is used to indicate a protective conductor terminal in the unit o Some of the circuits are powered whenever the unit is connected to the AC power source line power To ensure that the unit is not connected to the line power disconnect the power cord from either the power inlet on the unit s rear panel or from the AC line power source receptacle The power cord must always be accessible from one of these points If the unit is installed in a cabinet the operator must be able to disconnect the unit from the line power by the system s line power switch Disconnecting from Line Power Line Power Requir
51. efective e The unit does not pass the initial inspection In the event of carrier responsibility JDS Uniphase will allow for the repair or replacement of the unit while a claim against the carrier is being processed Getting Started 13 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Returning Shipments to JDS Uniphase JDS Uniphase only accepts returns for which an approved Return Material Authorization RMA has been issued by JDS Uniphase sales personnel This number must be obtained prior to shipping any material to JDS Uniphase The owner s name and address the model number and full serial number of the unit the RMA number and an itemized statement of claimed defects must be included with the return material Ship return material in the original shipping container and packing material If these are not available packaging guidelines are as follows 1 Wearan anti static wrist strap and work in an ESD controlled area 2 Cover the front panel if applicable with a strip of cardboard 3 Wrap the unit in anti static packaging Use anti static connector covers if applicable 4 Packthe unit in a reliable shipping container 5 Use enough shock absorbing material 10 to 15 cm or 4 to 6 in on all sides to cushion the unit and prevent it from moving inside the container Pink poly anti static foam is the best material 6 Sealthe shipping container securely 7 Clearly m
52. eflect changes in the conditions of the attenuator Each bit in the operation event register and the questionable event register is associated with a bit in the corresponding condition register Depending on the values of the positive transition register and the negative transition register a bit in the event register can be set when the associated bit in the condition register changes from 0 to 1 from 1 to O or both If both the positive transition and negative transition bits are set to 0 the event register bit is not set on either transition Questionable Event Register Read with STATus QUEStionable EVENT query Written to with Cannot be written to Cleared by Power on CLS common command Operation and Questionable Event Enable Registers The event enable registers determine which event bits in the associated event register cause the summary message bit in the status byte register to be set If any event bit in the event register is set while its associated bit in the event enable register is also set the summary message bit is set to true Power on Questionable Event Enable Register STATus QUEStionable ENABle query STATus QUEStionable ENABle command Cleared by Power on Operation and Condition Positive Transition Registers If a bit in the positive transition register is set a positive transition a transition from O to 1 in the associated bit in the condition register sets the associated bit in the event register
53. ements The unit can operate from any single phase AC power source that supplies between 90 and 240 V at a frequency range of 50 to 60 Hz The maximum power consumption is 80 VA Fuse Type The fuse type used by the unit is 5x20 mm T1A 250 V slow Safety 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Safety Instructions The following safety instructions must be observed whenever the unit is operated serviced or repaired Failure to comply with any of these instructions or with any precaution or warning contained in the user s manual is in direct violation of the standards of design manufacture and intended use of the unit JDS Uniphase assumes no liability for the customer s failure to comply with any of these safety requirements Before Initializing and Operating the Unit M Inspect the unit for any signs of damage and read the user s manual thoroughly M Install the unit as specified in the Getting Started section M Ensure that the unit and any devices or cords connected to it are properly grounded Operating the Unit Warning To avoid the risk of injury or death always observe the following precautions before initializing the unit If using a voltage reducing autotransformer to power the unit ensure that the common terminal connects to the earthed pole of the power source Use only the type of power cord supplied with the unit Connect the power cord
54. esting or for calibrating the linearity of power meters In addition the attenuator can be used for loss simulation and for measuring bit error rate BER curves and the dynamic range of receivers Figure 2 transmitted attenuated light HA9 light transmitter receiver attenuator Figure 2 Block Diagram Linearity The linearity of the attenuation is not affected by wavelength Insertion Loss Insertion loss is not included in the attenuation of the attenuator Source Considerations Source output powers can be sensitive to reflections For example if the output of the attenuator is connected to a jumper with an unterminated non angled connector for example an FC PC connector coupled into a detector a large reflection can be coupled back into the source when the attenuator is used at low attenuation settings Consequently as the attenuation is increased the reflection level back into the source decreases making the HA9 attenuator seem non linear over the range of 0 to 10 dB The following methods can be used to offset the effects of reflection e Using an angled connector for example an FC APC connector at the detector e Adding some attenuation 5 to 10 dB typically between the source and the attenuator e Using an isolator between the source and the attenuator Key Features 0 01 dB resolution and repeatability 0 to 100 dB attenuation range 1200 to 1700 nm or 750 to 1700 nm wavelength ranges Single mode or multim
55. fore the last power down the OFFS status LED is lit and the attenuation displayed is the offset value If the offset value is 0 the attenuation displayed is 0 00 dB To set the operating mode to ATT or PWR mode 1 Press the ATT PWR key to toggle between Attenuation and Power modes When switching back from OFFS or X wavelength mode the last operating mode used ATT or PWR is activated when ATT PWR is pressed The attenuator displays results in dB when in ATT mode and in dBm when in PWR mode To use the attenuator 1 Connect the device under test to the unit Figure 9 Operating and Maintenance Instructions 20 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com connect to either port Figure 9 Using the Attenuator Turning the Beam Block On or Off The beam block function uses a transistor to drive a 5 V relay which when activated moves a blocking element in front of the light beam The relay actuator is attached to the beam blocking element which provides an infinite attenuation by blocking the optical path The built in beam block is automatically activated when the attenuator is powered off as a safety feature It must be deactivated after power up so that light can pass through the attenuator To turn the beam block on or off when the attenuator is powered on 1 To turn the beam block off press the key The beam block is deactivated when the indi
56. g and Maintenance Instructions 27 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ATT PWR OFFS X r3 r1 RESET oo DRIVER OdB 1 JDS Uniphase HA9 OPTICAL ATTENUATOR E fe LCL l O orrs A A A H sr HOUOL O Lock 3 2 O ADDR E TESTE o OsRa wv wv v Y unscrew panel and pull out gently Figure 12 Removing the Connector Panel Remove the connectors from the connector bulkheads Clean the connector ends and the bulkhead mating sleeves with a lint free tissue and alcohol Reinstall the connectors into the connector bulkheads Reinstall the connector panel guiding the fibers back to ensure that they do not bend sharply Operating and Maintenance Instructions 28 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Programming Guide The following programming instructions for the HA9 attenuator are intended for users who are familiar with remote interfaces and how to send or receive messages over a device A detailed description of the GPIB interface is in ANS IEEE Std 488 1 1987 IEEE Standard Digital Interface for Programmable Instrumentation published by the Institute of Electrical and Electronics Engineers There are two external interfaces for remote control of the attenuator a GPIB parallel interface and an RS232 serial interface Either inte
57. gisters ssssseeesssss 56 Operation and Questionable Event Registers sssssssseeeessse 57 Operation and Questionable Event Enable Registers ssssssssss 57 SD000257 Rev H May 2000 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Operation and Condition Positive Transition Registers sssssssss 57 Operation and Questionable Negative Transition Registers 58 ee Vie ur Mer p 58 CUTOUT ot cea esc 59 Error 10 U ce ro a te eR Re ae D ILE 59 Description of Error Numbers esssssssessseeeeeeeeeeeenne nemen nennen 59 SCPI Command Tree cccccccccccceecsceeceeeeeseeecesueueeeeuseeueeeeeeseseueeeueeaeaaeeeaeeeneeees 63 Common Commands ccccccecccececeeececueceeueeeeeeeceueceeuaeeueueesuaueeuaueeneaeesaaueeneeees 66 bis lay Commands TS 70 INPut Commands sssesseen e mn nnnennrnnnnrnne nre enhn nsn rr nena nasse nena 71 OUTPut Command eesseeesee eem enenennnennnrnne rn nenn nns se resa na essa as ssa nena 74 Status Commands esses e dinaran rana raa akarati i neadi deae assa sena 76 System Command 5222599299299 1 90 onan COLUMN ev MY 80 User Commands a a aaa a nne nmn e ra Ta a aaa TEE ars s ae ada a anna 80 IEEE 488 2 Common Commands cccccccceccceececeecseeuceeeecesuu
58. ic characters 0 to 9 and the letters A to F both lowercase and uppercase are accepted Binary values can only contain the numeric characters 1 and 0 For example Q12347 is a valid octal number dtha57b2 is a valid hex number B010111 is a valid binary number Suffixes Some commands have an optional base unit see the IEEE 488 2 Common Commands section that can be combined with a multiplier to form a suffix However the base unit s dBm and dB cannot be combined with a multiplier The valid multipliers and their values are listed in Table 8 Programming Guide 49 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Table 8 Valid Multipliers Multiplier Value EX 1E18 PE 1E15 T 1E12 G 1E9 MA 1E6 K 1E3 M 1E 3 U 1E 6 N 1E 9 P 1E 12 F 1E 15 A 1E 18 For example for the wavelength command that has a base unit of meter m the following message formats are valid INPUT WAVELENGTH 1200NM INPUT WAVELENGTH 1 6e 06 M INPUT WAVELENGTH 1 4e 09 KM The following message formats are not valid INPUT ATT 50 NDB OUTP POW 10 mdBm Response Formats When a query is sent to the attenuator the attenuator returns a response message e Response messages are terminated by the sequence lt LF gt If the response is being sent through the GPIB the EOI is set true when the last character in a response is se
59. in the command path If a default command for a path exists it is enclosed by square brackets in the command tree If a default command is implied in the first command of a program message the command path for subsequent commands is determined as if the default command had been explicitly included in the first command header OUTPut STATe boolean STATe APOWeron boolean APOWeron APMode boolean The following program messages are valid OUTP 1 APM 1 OUTP STATE APOW 1 APOW OUTP OUTP STAT OUTP APOW OUTP STAT APOW The following program messages are not valid OUTP 1 APOW 1 the APOW command is not at the same level as STAT OUT OUT does not exist use OUTP Parameter Types The acceptable parameter types for each command or query are listed in the command table see the IEEE 488 2 Common Commands section The following are definitions of each parameter type e Numeric Value Any value between 9 9E37 and 9 9E37 The value can be sent as an integer 154 a decimal 15 2 or an exponential number 4 5E6 The character data forms MIN minimum MAX maximum and DEF default are also acceptable Other character data forms can be accepted for specific commands e NRf Any value between 9 9E37 and 9 9E37 The value can be sent as an integer 154 a decimal 15 2 or an exponential number 4 5E6 The character data forms MIN MAX and DEF are not accepted Programming Guide
60. isconnecting from Line Power sesesessseeeeeeeeneeeennnnn nemen nnn 1 Line Power Requirements uessssssesssssseeeeseeeeeenne nennen nnne nennen 1 FUSSY Ma p 1 Safety IS ME UN UNG iacu sat ace aca a op tmc oa dtu sumus Must bali sunl ics ie 2 Before Initializing and Operating the Unit eeeeseeeeeeeesseee 2 Operating the Unit PH 2 Safety SYMDOLS er em MN 4 Compliance sranane eer iita suut Le ERE M a ee 5 FOC COMPAN Ostereier 5 8 a 6 0612 2 40 are t n eenn 5 UL Combllaf E serisidir o enia eii tsi at ae ud 6 General Information and Specifications eeeeeeeeeeeeeeeeeeeeeeee nennen nnne nnn nnn 7 General IMPONMAUON e 7 Key Features c e 8 Applications m H 9 Standard ACCESSONGS m M 9 Meiei iiire cn mE 9 SN CI GAINS uuusscetaxtumte tes scbbitieistqsu sitat bn mur bp een d UN ox Mbs DUM D NM AER SEDI MEE 10 erae SI GIO ec HR 12 Before Initializing and Operating the Unit 12 Mitial MTS VS GOON ERE o o E S 12 Operating EMV ps T E 13 Bu PANU G eR T 13 rm U 1e pio 1i REND E 13 MOPIDISUDFIS eee eee ee ene e ne sss cct ps MIL REM I LM MS Ue 13 susuge inebeno psmet e ETT 13 Claims and Repackaging
61. its in the operation status structure reflect a specific condition within the attenuator The attenuator only uses bit 1 of the operation registers Bit 1 the settling bit is set when the attenuator is in the process of adjusting the attenuation The bits in the questionable registers give an indication of the quality of the output of the attenuator None of the bits in the questionable register are currently used by the attenuator All three status structures are connected by the status byte register Figure 13 and Figure 14 show the relationship between the registers Programming Guide 51 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ENABLE REGISTER PTR REGISTER NTR REGISTER Bit Value Bit Value Bit Value o 0 oj 1 0 1 1 CONDITION REGISTER 0 0 1 Positive Transition Negative Transition 4 Bit value changes from 0 to 1 Bit value changes from 1 to 0 RQS jose mes ese ww ise 2 1 O Operation Questionable Summary Bit Summary Bit Figure 13 Operational and Questionable Status Data Structures STATUS BYTE REGISTER Programming Guide 52 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com TM nnn RQS Service m s opea To Wu Generation SERVICE REQUEST ENABLE REGISTER PON zs CRE Pa DRE v i Es STANDARD EVENT STATUS REGISTER PON CME EXE
62. layed The previous mode if any is displayed for example SCPI LF 5 The command set HA9 HPM or SCPI message terminating sequence CR lt LF gt CR or lt LF gt TR and the GPIB address are displayed for example SCPI LF 5 For the HA9 and HPM command sets the message terminating sequence is permanently set to CR lt LF gt Press the related A W key to change the command set and the GPIB address Press the ATT PWR key Until manually reset these settings are used each time the attenuator is powered up Connecting the RS232 Interface The attenuator can be operated remotely using the RS232 interface The nine pin RS232 cable is user supplied When remote operation by the RS232 interface is required make the connection 1 Check the RS232 cable to ensure that the pin assignment is correct Figure 5 Use a straight through cable Getting Started 16 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Figure 5 RS232 Pin Assignment 2 Connect the cable to the remote terminal and to the RS232C port at the back of the attenuator Driver Pin Assignment The driver pin assignment is shown in Figure 6 T5V a iSHSH7H S DRIVER Figure 6 Driver Pin Assignment Caution Do not exceed 100 mA Checking Optional Connections The attenuator can include an optional coupler or switch If it does 1 Ensure that the connections to the coupler
63. m ww s N DISPlay INP ATT sets the total attenuation and INP ATT returns the total attenuation Therefore the maximum value for this command and query is the current offset 100 or 60 dB depending on the model The minimum and default values are the current offset 0 dB Programming Guide 63 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Parameters Response Command Status table continued OFFSet MAX MIN DEF Numeric Value 1200NM 1700NM 1310NM WAVelength MAX MIN DEF 1200NM 1700NM 1310NM C ouTPut ee eC stare C Boolean DIS APOWeron LAST Ea e a e a a C ome sam LC Eme SRL 1 EVENt Stet te NRf 32 76 ENABIe NRf ENABle NRf 32 76 NTRansition NRf NTRansition NRf 32 76 PTRansition NRf 7 0UTP POW sets the through power and OUTP POW returns the through power The maximum value for this command is the through power for which the actual attenuation is 100 or 60 dB depending on the model The minimum and default values are the through power for which the actual attenuation is 0 dB Programming Guide 64 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Parameters Response Command Status Pemon n X eq table continued QUEStionable NRf EVENt 32 76 ENABIe NRf 32 76 i NTRa
64. m 1200 to 1700 nm for the standard HA9 model and from 750 to 1700 nm for the wide model HA9W The default unit is meters m Display Mode Controls the display mode of the attenuator while in Remote mode e O ATT mode e 1 PWR mode CAL Display Offset ATT Mode Sets the display offset in ATT mode The default unit is dB PCAL Display Offset PWR Mode Sets the display offset in PWR mode The default unit is dBm Programming Guide 34 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com STPWR Display Offset PWR Mode Sets the display offset in PWR mode so that the display matches the power meter reading The default unit is dBm ATT Attenuation Sets the attenuation of the attenuator relative to the O dB reference position that is it is independent of the attenuation display offset The default unit is dB PWR Output Power Sets the output power of the attenuator including the display offset The default unit is dBm Use PCAL or STPWR or perform a calibration in Local mode before performing PWR XDR Driver Control Controls the on off status of the driver O driver off 1 driver on SRQ Mask Register Writes a decimal number to the eight bit SRQ mask register Setting a bit to 1 generates a service request interrupt SRQ when the corresponding bit in the status register changes from 0 to 1 see the Status Reporting and Service Request Control section
65. meters were received than the command or query requires Programming Guide 59 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Missing parameter Fewer parameters were received than the command or query requires Command header error An error was detected in the command header but the parser cannot be more specific Header separator error A character that was not a valid header separator was encountered Program mnemonic too long The command header contained too many characters Undefined header The command header has the correct syntax but is not defined for the attenuator Header suffix out of range The suffix was incorrect Numeric data error An error was detected in a numeric data element but the parser cannot be more specific Invalid character in number An invalid character was found in a character type parameter Exponent too large The exponent in a decimal numeric value was greater than 32 000 Too many digits The mantissa in a decimal numeric value had more than 255 digits Numeric data not allowed Programming Guide 60 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com A valid numeric parameter was received but the required parameter type is not numeric Suffix error An error was detected in the suffix sent with the command but the parser cannot be more specific Suffix
66. mpleted setting the attenuation to 10 dB DISPlay Commands DISPlay BRIGhtness DISPlay BRIGhtness lt space gt lt numeric value where 0 x numeric value lt 1 Function Sets the brightness of the LCD display Because the display brightness can only be set to 1 the numeric value is rounded to 1 This command is implemented only to maintain compatibility with the HP 8156A attenuator DISP BRIG 1 0 DISPlay BRIGhtness DISPlay BRIGhtness Returns the brightness setting for the display DISP BRIG 0 5 BRIG returns 1 in all cases DISPlay ENABIe DISPlay ENABle boolean Function This command enables or disables a display on the attenuator However because the attenuator display cannot be turned off the command has no effect It is implemented only to maintain compatibility with the HP 8156A attenuator DISP ENAB 1 DISPlay ENABle DISPlay ENABle Returns the current state of the display DISP ENAB 0 ENAB returns 1 in all cases Programming Guide 70 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INPut Commands INPut ATTenuation INPut ATTenuation space numeric value dB Function Sets the total attenuation to the parameter value by changing the actual attenuation Because the total attenuation includes the offset the actual attenuation of the attenuator is set according to the following formula Attactual Atti
67. ng Guide 58 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Output Queue Responses to query messages are placed in the output queue This queue is 100 bytes long When a response is placed in the output queue the MAV bit in the status register is set The MAV bit is cleared when the response is sent If an attempt is made to read the output queue when it is empty and the current program message does not contain a query a query error bit is set Error Queue Errors are placed in the error queue This queue is 100 bytes long Because it is an FIFO queue the error returned when the error queue is read is always the first error that occurred An error is only placed in the queue once If more than three errors are placed in the error queue an overflow error occurs and the last error in the queue is overwritten with error number 350 Queue Overflow Each error in the queue consists of an error number and a brief error message Description of Error Numbers No error No error has occurred Command error A command error was detected but the parser cannot be more specific Syntax error The command or data was not recognized Invalid separator The parser was expecting a separator and did not find one Data type error A parameter was not the right type for example a string was expected but a non decimal numeric was received Parameter not allowed More para
68. nsition NRf SC NTRansition NRf 32 76 SC PTRansition NRf SC PTRansition preset p pl o system p S ER NAY String S j version f Sie S j calibration P USRMode Boolean TT ee ee store NumericVaue oo 20 1o N sow 1 Programming Guide 65 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Common Commands Clear Status Command Function Clears the following queues and registers Error queue Standard event status register Status byte register Operation event register e Questionable event register If CLS is sent immediately after a message terminating sequence both the output queue and the MAV bit in the status byte register are cleared CLS also cancels the functions of OPC and OPC Standard Event Status Enable Register Command ESE space numeric value where 0 lt numeric value lt 255 Function Sets the bits in the standard event status enable register The numeric value is rounded to the nearest integer and converted to a binary number The bits of the register are set to match the bit values of the binary number ESE 216 sets the standard event status enable register bits to 11011000 Standard Event Status Enable Register Query Function Returns the contents of the standard event status enable register a
69. nt e A response message is generated for each query in a program message Each response message is separated from the next by a semicolon For example if the total attenuation is set to 10 dB and the wavelength is set to 1550 nm the program message INP ATT WAV returns the response message 10 0000 1 550e 06 Programming Guide 50 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e Each response message can contain multiple pieces of data Data within a response message is separated by a comma for example the query IDN returns JDS UNIPHASE HA9X 0 YY YYY Overview of Implemented Status Structures There are three distinct status data structures implemented in the attenuator e EEE 488 2 defined standard registers standard status structure e SCPI defined operation registers operation status structure e SCPI defined questionable registers questionable status structure The standard status structure consists of four registers Status byte register Service request enable register Standard event status register Standard event status enable register The operation and questionable status structures are identical except for the use of specific bits These status structures are each composed of five registers Condition register Positive transition register PTRansition Negative transition register NTRansition Event register Event enable register The b
70. nt status enable register is set e Bit 6 as the service request bit is set to 1 if a service request has been generated The SRQ bit is set internally and is not visible to the user Bit 6 as the master summary bit is set if there is at least one reason for the attenuator to request service from the controller That is the master summary bit is set if any summary bit in the status byte register is set and if the corresponding bit in the service request enable register is also set The MSB is returned as bit 6 when the status register is queried or the attenuator is serial polled e Bit 7 operation summary bit is the summary bit for the operation status register It is set if any bit in the operation event register is set while the corresponding bit in the operation event enable register is set Programming Guide 54 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Service Request Enable Register The service request enable register determines which summary bits in the status byte register can generate service requests If a summary bit in the status register is set to 1 and the corresponding bit in the service request enable register is also set to 1 a service request is generated by the attenuator A new service request is not generated for this condition unless the bit in the status register or the bit in the service request enable register is cleared and the condition reoc
71. ntroller board manufacturers provide basic output and input statements for communicating messages to a GPIB instrument Before using any of these examples ensure that the GPIB address is set to 5 that the active interface command set is HA9 and that the switch is connected to the computer via a GPIB cable The GPIB commands that appear in this section do not always show a terminating sequence however it is implied Sending Commands This example sets the wavelength to 1300 nm and the attenuation to 20 dB the commands demonstrate the use of a variable in the statement that sends the attenuation command OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT PRINT 1 GPIBEOS IN CR LF PRINT 1 GPIBEOS OUT CR LF PRINT 1 OUTPUT 05 WVL 1300e 9 m atten 20 PRINT 1 OUTPUT O5 ATT atten dB END This example sets the offset to 10 the total attenuation to 30 dB and the wavelength to 1550 nm OPEN GPIBO FOR OUTPUT AS 1 OPEN GPIBO FOR INPUT AS 2 PRINT 1 ABORT National Instruments is a trademark of National Instruments Programming Guide 41 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com PRINT 1 RESET PRINT 1 GPIBEOS IN LF setting terminating characters to LF PRINT 1 GPIBEOS OUT LF DIM ATTEN AS SINGLE DIM WAV AS INTEGER PRINT 1 OUTPUT 05 INP OFFS 10 ATTEN 30 0 WAV 1550 PRINT 1 OUTP
72. o 100 dB lt 2 5 seconds 0 to 60 dB accuracy 0 03 dB typical 0 1 dB 0 03 dB typical 0 1 dB maximum maximum Insertion loss SM 1 2 dB typical 1 5 dB maximum MM 50 125 2 2 dB MM other 2 9 dB Return loss SM SM analog MM 50 125 MM other Maximum optical input 200 mW power Polarization dependent 0 03 dB typical 0 08 dB maximum loss Beam block gt 110 dB attenuation Recalibration period 2 years recommended The attenuation range is a continuous function of wavelength At constant temperature wavelength and polarization state after a half hour warm up 3 With optimization of the calibration wavelength or user slope If optimization is not performed accuracy is the greater of 0 1 dB or 0 004 dB dB from 1260 to 1360 nm and from 1450 to 1570 nm At other wavelengths the accuracy is the greater of 0 1 dB or 0 015 dB aB if optimization is not performed Measured at 23 C with a laser source Not including connectors switch or coupler if installed Over 850 to 1600 nm Insertion loss is typically highest at wavelength extremes General Information and Specifications 10 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Total of discreet reflections not including distributed reflection in fiber Table 3 Other Specifications Input voltage 90 to 240 V AC 50 to 60 Hz Power consumption 80 VA maximum Physical
73. ode fiber Built in beam blocking switch Less than 2 5 seconds from 0 to 100 dB IEEE 488 2 and RS232 interfaces SCPI compatible command set Universal connector adapter UCA option LabVIEW drivers General Information and Specifications 8 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Applications Testing erbium doped fiber amplifiers EDFAs Testing and or calibrating the linearity of power meters Measuring bit error rate curves Measuring the dynamic range of receivers Simulating loss Standard Accessories LabVIEW drivers diskette and user s manual AC power cord Rack mount kit with assembly instructions User s manual Optional Accessories e Built in 1x2 switch e Built in splitter 1 99 2 98 5 95 10 90 or 55 50 e UCAs General Information and Specifications 9 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Specifications The following optical specifications describe the warranted characteristics of the unit Table 2 Supplementary specifications describe the typical non warranted performance of the unit Table 3 Table 2 Optical Specifications Wavelength range 1200 to 1700 nm 750 to 1700 nm Attenuation range 100 dB 260 dB resolution 0 01 dB nominal 0 01 dB nominal repeatability 0 005 typical 0 01 dB 0 005 typical 0 01 dB maximum maximum change rate lt 2 5 seconds 0 t
74. ons for temperature humidity and ventilation Temperature The unit can be operated in the temperature range of 0 to 40 C Humidity The unit can be operated in environments with up to 9096 humidity 0 to 40 C Do not expose it to any environmental conditions or changes to environmental conditions that can cause condensation to form inside the unit Ventilation The unit contains a built in cooling fan Do not install it in any location where the ventilation is blocked For optimum performance the unit must be operated from a location that provides at least 75 mm 3 inches of clearance at the rear and at least 25 mm 1 inch of clearance at the bottom Blocking the air circulation around the unit can cause the unit to overheat compromising its reliability Warning e Do not use the unit outdoors e To prevent potential fire or shock hazard do not expose the unit to any source of excessive moisture Storing and Shipping To maintain optimum operating reliability do not store the unit in locations where the temperature falls below 40 C or rises above 60 C Avoid any environmental condition that can result in internal condensation Ensure that these temperature and humidity requirements can also be met whenever the unit is shipped Claims and Repackaging Immediately inform JDS Uniphase and if necessary the carrier if e The contents of the shipment are incomplete e The unit or any of its components are damaged or d
75. or for example if a command parameter is out of the range of the attenuator or if a valid program message cannot be executed due to some condition in the attenuator e Bit 5 command error is set when a command error is detected by the attenuator for example if a syntax error is detected in a program message an incorrect command header is received or if an IEEE GET message is received in the middle of a program message e Bit 6 user request is always set to 0 e Bit 7 power on is set when an off to on transition occurs in the power supply of the attenuator Standard Event Status Enable Register The contents of the standard event status enable register determine which events in the standard event status register are reflected in the event summary bit ESB of the status byte register Standard Event Status Enable Register Read with ESE common query Written to with ESE common command Cleared by Power on ESE common command with a parameter value of 0 Operation and Questionable Condition Registers Each bit in these condition registers reflects a specific condition or state within the attenuator A bit is set when the attenuator enters the state associated with that bit and remains set while the device is in that state Programming Guide 56 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Operation and Questionable Event Registers Event registers r
76. or switch are appropriate Getting Started 17 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Operating and Maintenance Instructions Front Panel The front of the attenuator is shown in Figure 7 Figure 7 Front of the Attenuator varies with model Operating Keys The operating keys are described in Table 4 Table 4 Operating Keys Power on I off O switch ATT PWR Sets the unit to Attenuation ATT mode to display attenuation in dB or to Power PWR mode to display the optical power out in dBm OFFS Sets the unit to Display Offset mode The ATT and PWR displays can be offset separately I Sets the unit to Calibration Wavelength mode Controls the on off status of the beam block DRIVER reserved for future use without built in 1x2 switch Controls the on off state of the driver with built in 1x2 switch Controls the switch state off Channel 1 on Channel 2 0 dB in ATT or PWR mode Sets the attenuation to 0 dB in Display Offset mode Sets the offset to 0 dB Returns the unit to Local mode from Remote mode table continued Operating and Maintenance Instructions 18 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com When held down for one second sets the unit to the minimum loss position Increases A decreases W the attenuation power offset and Minen Are hn Min Each pair
77. or three seconds The attenuator is reset that is the attenuation is set to 0 dB the operating mode is set to ATT and the display offset is set to 0 dB 2 Set the power meter to 0 dB 3 Press the A or W key to adjust the attenuation until the power meter reading reaches 10 00 dB Operating and Maintenance Instructions 22 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 4 Press the key 5 Press the 0 dB key The calibration wavelength changes to user and the displayed attenuation changes to 10 00 dB 6 To cancel the user slope reset the attenuator or switch to A mode and then press the corresponding A or W key Setting the Display Offset The attenuator uses separate display offsets for ATT and PWR mode The minimum offset level is 0 dB and the maximum is 99 99 dB Setting the Display Offset in ATT Mode In Attenuation mode the display offset is used to include both the insertion loss of the attenuator and any connection losses in the attenuation value displayed To set the offset 1 Ensure that the attenuator is in ATT mode readings are in dB If not in ATT mode press the ATT PWR key The attenuator displays the offset OFFS that is added to or subtracted from the actual attenuation XX XX for example OFFS XX XX dB The offset value is displayed to two decimal places 2 Press the OFFS key The key lamp lights to indicate that the attenuator
78. r ENS UE ERU US 34 HA9 HPM Query Commands sesssssseeeeeeeeeeeenn nnne nnne nnne 36 Status Reporting and Service Request Control cccccceeeeeeeeeeeeeeeeeeeeeeeeeeees 39 Condition Register ciae puce EE amus Eo cxx pu Ritus Senf Aaebigkud Fas ie Exp pup bM DNE 39 Status isl ge n 39 SRC Mask Register E Q 40 GPIB Programming Examples sxcecisseecondietwcardsterssitneincartssrreedineeriseexiedes imeem 41 SCPI Command Set met 45 Program Message Formats 1 a ete rto kx ehe RC cU KE IM EIS EU PUERUM xL USE PU IPS 46 Terminating a Program Message sssssseen enm 46 Command Header VariatlOns uiieea eri titer th aat Fake arua RUE 46 Specifying the Command Path sss 46 Mns pe 48 Parameter Types m T 48 pi e X 49 Response Formals usciti orti aiuti quae ui qe QR RH PERPE ConpupPAxEE PHAR M simian 50 Overview of Implemented Status StruCtures cccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 51 Status Byte Register e 54 Service Request Enable Register esseeseeeeeeneee 55 Standard Event Status Register sssssesseeeeene 55 Standard Event Status Enable Register seeessseeeesssss 56 Operation and Questionable Condition Re
79. r does not complete the data exchange handshaking on the bus until the new attenuation is set The attenuator is always ready to accept characters over the RS232 interface A query command is used to extract status information from the attenuator For example ATT CR lt LF gt returns the current attenuation setting The queries ATT PWR CAL PCAL and WVL can include the parameters MIN and MAX ATT MAX for example returns the maximum attenuation that can be set at the current wavelength Query commands in remote operation of the attenuator via the GPIB or the RS232 interface results in four digits after the decimal point However only the first two digits after the decimal point are significant the third and fourth decimal digit must be ignored Multiple command messages can contain only one query command A query must be the last command in the message for example ATT 20 dB ATT CR lt LF gt Programming Guide 33 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com HA9 HPM Operation Commands Beam Block Controls the on off status of the beam block 0 beam block off 1 beam block on RESET Reset Returns the attenuator to the following default settings WVL 1310 nm DISP 0 CAL 0 dB PCAL 0 dB ATT 0 dB The values of D XDR and SRE are not changed WVL Calibration Wavelength Sets the calibration wavelength of the attenuator fro
80. rface can be used to send commands and receive status information from the attenuator while using the SCPI or HA command set HP Mode operation is not available via the RS232 interface The attenuator accepts three types of command sets HPM for example HP Mode Standard Command for Programmable Instrument SCPI and HA9 The HPM command sets are provided for compatibility with previous attenuator models The HPM command sets are compatible with the Hewlett Packard HP 8157A and HP 8156B attenuators The SCPI command set is based on IEEE 488 2 and is compatible with the Hewlett Packard HP 8156A attenuator On power up the attenuator displays the active interface command set Setting the GPIB Address and the Interface Command Set for Remote Operation Before using the attenuator in Remote mode the GPIB address and the instrument command set must be selected The GPIB address is a number between 1 and 30 and is used to select an instrument on the GPIB bus The command set is HPM SCPI or HA To set the attenuator for remote GPIB operation 1 Ensure that the attenuator is powered off O 2 Set the power switch to I on and as the unit powers on press and hold the LCL key for a few seconds The display shows the command set SCPI HA9 or HPM YYY the message terminating sequence carriage return line feed CR LF or lt LF gt TR and the GPIB address AD for example YYY TR AD 3 Press the A or W key to change th
81. rovided 5 Set the power switch to I on and observe the power up sequence The attenuator always powers on in ATT mode All key lamps and status LEDs light The version number of the software is displayed briefly The calibration wavelength in nm XXXX and the attenuation YY YY dB are displayed for example XXXX YY YY GB The command set YYY the message terminating sequence CR lt LF gt or CR or lt LF gt TR and the GPIB address AD a number between 1 and 30 are also displayed An example is YYY TR AD The status of the beam block BLK and the attenuation in dB XX XX are displayed for example BLK XX XX If a malfunction is detected during the power up sequence an error message is displayed If an offset setting was entered and used before the last power down the OFFS status LED is lit and the attenuation displayed is the offset value If the offset value is 0 the attenuation displayed is 0 00 dB 6 Keep the packaging Getting Started 12 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Immediately inform JDS Uniphase and if necessary the carrier if the contents of the shipment are incomplete if the unit or any of its components are damaged or defective or if the unit does not pass the initial inspection Operating Environment In order for the unit to meet the warranted specifications the operating environment must meet the following conditi
82. s an integer that when converted to a binary number represents the bit values of the register Example ESE returns 216 if the standard event status enable register is set to 11011000 Standard Event Status Register Query Function Returns the contents of the standard event status register as an integer that when converted to a binary number represents the bit values of the register Example ESR returns 195 if the standard event status register is set to 1100001 1 Identification Query Function Returns a string that identifies the manufacturer the HA9 model number the serial number or 0 if unavailable and the firmware level Programming Guide 66 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com IDN returns JDS UNIPHASE HA9X 0 YY YYY Operation Complete Command Function Causes the attenuator to set the OPC bit in the standard event status register when all pending operations have been completed Operation Complete Query Function Places a 1 in the output queue of the attenuator when all pending operations have been completed Because the 1 is not always placed in the output queue immediately poll the status byte register and check the MAV bit to determine if there is a message available in the output queue Option Identification Query Reports on options installed or included with the attenuator OPT returns in all cases atten
83. san Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Program Message Formats A program message consists of a command header followed by its required parameters The parameters must be separated from the command header by a space for example INPUT ATTENUATION 10 Multiple parameters must be separated by a comma Each program message can contain one or more message units The message units in a program message must be separated by a semicolon for example INPUT ATTENUATION 10 INPUT OFFSET 20 Terminating a Program Message The terminating sequence lt LF gt ASCII character 10 or an EOI sent with character signals the attenuator that the end of the program message has been received When an EOI is received with any character other than the terminating sequence lt LF gt lt LF gt is put in the input queue immediately after the character This action applies only to characters sent through the GPIB interface because the RS232 interface does not have an EOI signal The terminating sequence lt LF gt does not always appear in the program examples provided in this section however it is implied Command Header Variations Each command header in the command tree has both a long form and a short form Either form is acceptable and each gives identical responses for example the following two message units both set the attenuation to 10 dB INPUT ATTENUATION 10 dB inp att 10d
84. sgg me 22 Setting gia coded s 23 Setting the Display Offset in ATT Mode sss 23 Setting the Display Offset in PWR Mode sss 23 Setting the POWSEN aiiis ideo meu ot betska opus teu ltd ssim Dp EM EME ea DU ie 24 Controlling the Drive ec US 24 Resetting the Attenuator esses eene nennen nnne nnne nennen 24 Checking Attenuator CallDEFatlofi uus oa nita a ni pua tro r trud eere qus Fees posset EE Ra Prud S 24 Required EuipITIBDL aiuto iue ooi cias Ede Scent ee ee eee 24 i a sEE crio P M 26 Verifying Insertion LOSS e 27 Maintaining the Attenuator sieiccestsspecbedncecebendadeapesscdnettetednantesidustedeccadecnendvaseereecawieny 27 Programming Guld siccistccissicatee eee eee eerie ene eee 29 Setting the GPIB Address and the Interface Command Set for Remote Operatii ssuda a nn E a EER 29 Switching between Remote and Local Operation ssseeeeeee 30 GPIB Interface Functions iuc eir rere ete Initia pente xo ptt apa EXE EEMErF ti aere t i guid 30 RS232 Interac FUNCHONG e ET 30 H3232 Programming EXAITIB BS eioresasieneta uota tope cite Feb Fe Reti reta vete n etta da deg 31 HAS and HPM Command SeLS ciso prr ioc eur incta EO Un UU reciba akae EKRA Ka Ea ERN 32 Command Parser Rules sessssssseseeeeeeeeneeeeenn nennen nnnm nnns 33 HA9 HPM Operation Commands coe tt tier tu ck uh en am tuu eue
85. t use rubbing alcohol to a small area of a lint free towel and rub the end of the ferrule over the wet area 3 Wipe the ferrule on a dry area of the lint free towel m Using the dusting gas or compressed air blow the end of the ferrule 5 Apply the alcohol or ethanol to a lint free pipe cleaner or swab and wipe off the remaining parts of the connector 6 With the other end of the pipe cleaner or swab dry the areas cleaned 7 Using the dusting gas or compressed air blow the areas cleaned Connecting and Setting the GPIB Interface The attenuator can be operated remotely using the GPIB interface The 24 pin GPIB cable is user supplied When remote operation by the GPIB interface is required first make the connection 1 Check the GPIB cable to ensure that the pin assignment is correct Figure 4 Getting Started 15 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 24 H23 H22 H 21H29 19 18H17 H16 H 15H 14H13 Figure 4 GPIB Pin Assignment Connect the cable to the remote terminal and to the IEEE488 GPIB port at the back of the attenuator Caution Tighten the connector lock screws by hand Do not use a screwdriver Next set or reset the GPIB address and the command set 1 2 Ensure that the attenuator is powered off O Turn on the power switch I and while the unit powers on press and hold the LCL key The GPIB setup message is disp
86. tion Function Returns the contents of the questionable negative transition register as an integer that when converted to a binary number represents the bit values of the register STAT QUES NTR 12 NTR retums 12 STATus QUEStionable PTRansition STATus QUEStionable PTRansition space lt NRf gt Function Sets the bits of the questionable positive transition register The NRf value is rounded to the closest integer and converted to a binary number The bits of the register are set to match the bits of the binary number Example STAT QUES PTR 255 sets the bits of the questionable positive transition register to 000000001 1111110 STATus QUEStionable PTRansition STATus QUEStionable PTRansition Function Returns the contents of the questionable positive transition register as an integer that when converted to a binary number represents the bit values of the register STAT QUES PTR 12 PTR retums 12 STATus PRESet STATus PRESet Function This command presets all the enable and transition registers in the questionable and operation registers to the following settings All bits in the ENABle registers are set to 0 All bits in the positive transition registers are set to 1 e All bits in the negative transition registers are set to 0 STAT PRES Programming Guide 79 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com System Commands
87. tructed with good engineering practice in safety matters The unit has been designed and tested to comply with directive 89 336 EEC and its subsequent amendments The directive relates to electromagnetic compatibility It demands that electromagnetic disturbance does not exceed a prescribed level that the equipment be immune to a prescribed level of ambient level of interference that the equipment be protected Safety 5 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com against electrostatic discharges and that the equipment be immune to all electrical shock wave disturbances As of 1997 measures have been added to test for fire hazard electric shock hazard and also external exposure to other forms of energy The requirements specified by directive 89 336 EEC are as follows CE compliance requires that the manufacturer or its authorized representative established within the Community affix the EC conformity mark to the apparatus or else to the packaging instructions for use or guarantee certificate The EC conformity mark shall consist of the letters CE as specified and the figures of the year in which the mark was affixed This mark should where appropriate be accompanied by the distinctive letters used by the notified body issuing the EC type examination certificate Where the apparatus is the subject of other Directives providing for the EC conformity mark the affixing of the
88. uator has no defined device options Recall Command Syntax RCL lt space gt lt numeric value where 0 x numeric value lt 9 Function Restores the attenuator to a state that has been stored in local memory Restoring to state 0 RCL 0 is equivalent to sending the RST command See the Save Command for a list of settings that are stored for each state Reset Command Function Restores the attenuator to the following settings Total attenuation 0 dB Display offset 0 dB Wavelength 1310 nm LCM state OFF Absolute power mode state OFF Beam block state at power on LAST Beam block state ON Programming Guide 67 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Programming Guide 68 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Save Command Syntax SAV space numeric value where 1 lt numeric value x 9 Function Stores the current state of the attenuator in local memory as many as nine states can be stored For each state the following settings are stored Total attenuation Display offset Wavelength LCM state ON or OFF Absolute power mode ON or OFF Beam block state at power on OFF or LAST Beam block state ON or OFF Example SAV 3 Service Request Enable Command Syntax SRE lt space gt lt numeric value where 0 x numeric value x 255
89. ult in serious injury or loss of life if not carried out in proper compliance with all safety instructions Ensure that all conditions necessary for safe handling and operation are met before proceeding CAUTION The procedure can result in serious damage to or destruction of the unit if not carried out in compliance with all instructions for proper use Ensure that all conditions necessary for safe handling and operation are met before proceeding Safety 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Compliance FCC Compliance The Federal Communications Commission FCC of the United States of America requires that equipment operating in that country does not cause interference to communications The unit has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of Title 47 of the Code of Federal Regulations for Radio Frequency Devices Operation is subject to the following two conditions which the FCC requires to be labeled on the unit e This device may not cause harmful interference e This device must accept any interference received including interference that may cause undesired operation FCC rules require that the following note and subsequent information be included in this manual Note This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FC
90. urns 0 OUTPut STATe APOWeron OUTPut STATe APOWeron space boolean DIS LAST Function Sets the state of the beam block at power on DIS OFF or 0 leaves the beam block in the beam and 1 ON or LAST sets the beam block state at power on to the same state that the beam block was in at power off Example OUTP APOW LAST when the attenuator is powered on restores the beam block state to the same state it was in when the attenuator was powered off OUTP STAT APOW DIS leaves the beam block in the beam at power on OUTPut STATe APOWeron OUTPut STATe APOWeron Function Returns the state of the beam block at power on 1 if the beam block is set to the same state that it was in at power off and 0 if the beam block state is in the beam OUTP APOW 1 0UTP APOW returns 1 Status Commands STATus OPERation CONDition STATus OPERation CONDition Function Returns the contents of the operation condition register as an integer that when converted to a binary number represents the bit values of the register The attenuator only uses bit 1 of the operation condition register Bit 1 the settling bit is set when the attenuator is in the process of adjusting the actual attenuation Example STAT OPER COND Programming Guide 76 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com STATus OPERation ENABle Syntax STATus OPERation ENABle
91. wavelength is changed for example the attenuator prism is moved to give the same attenuation at the new wavelength A boolean value of 0 or OFF deactivates LCM mode When LCM mode is turned off the actual attenuation changes as well as the total attenuation when the wavelength is changed for example the attenuator prism does not move when the wavelength is changed INP WAV 1300 NM ATT 10 LCMode ON WAV 1550 NM sets the total attenuation to 10 dB and the total attenuation remains at 10 dB when the wavelength is changed from 1300 nm to 1550 nm INP WAV 1550 NM ATT 10 LCMode OFF WAV 1300 NM sets the total attenuation to 10 dB but the total attenuation changes slightly when the wavelength is changed from 1550 nm to 1300 nm INPut LCMode INPut LCMode Returns the current state of LCM mode for example returns 1 if LCM mode is ON and 0 if LCM mode is OFF INP LCM ON LCM returns 1 INPut OFFSet Function INPut OFFSet space numeric value lt suffix gt Sets the display offset of the attenuator The value of the offset has no effect on the actual attenuation but it does affect the total attenuation for example Attis Attactual Offset This command also accepts the parameters MIN MAX and DEF The minimum offset is 29 99 dB the maximum offset is 29 99 dB and the default offset is 0 INP OFFS 10 sets the offset to 10 dB If the actual attenuation is 14 dB the total attenuation is 24 dB
92. which the actual attenuation is 0 dB The default through power is the same as the maximum through power OUTP POW 34 55 se POWer Syntax OUTPut POWer lt space gt lt MIN MAX DEF gt Function Returns the current through power of the attenuator in dBm This query also accepts the parameters MIN MAX and DEF The minimum maximum or default value respectively for the through power at the current base through power is returned OUTP POW OUTPut STATe OUTPut STATe space lt boolean gt Function Sets the state of the beam block A boolean value of 0 or OFF leaves the beam block in the beam the default position thereby turning off the optical power from the attenuator When the beam block is in the beam the attenuation of the attenuator is 110 dB A boolean value of 1 or ON moves the beam block out of the beam thereby turning on the optical power out of the attenuator The attenuation setting of the attenuator is not affected by the beam block state Example OUTP OFF leaves the beam block in the beam OUTP STAT ON removes the beam block from the beam Programming Guide 75 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com OUTPut STATe OUTPut STATe Returns the state of the beam block 1 if the beam block is out of the beam and 0 if the beam block is in the beam Example OUTP ON STAT returns 1 OUTP OFF STAT ret

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