Test Jig OPM-JIG2_LXX - User Manual
Contents
1. 12ns generator 21 D2 RDout D2 bit in 8 bit wide pulsewidth TTL in generator 22 D3 SC DTRin D3 bit in 8 bit wide pulsewidth TTL in generator 23 D4 DSRout D4 bit in 8 bit wide pulsewidth TTL in generator 24 D5 RTSin D5 bit in 8 bit wide pulsewidth TTL in generator 25 D6 SO CTSout D6 bit in 8 bit wide pulsewidth TTL in 0 5 generator Option SPI SO 26 D7 Rlout D7 bit in 8 bit wide pulsewidth TTL in generator Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 Option Requires assembly changes 50 ohm input impedance an O lt gt a 5 5 Ensures a true O level at shutdown UI width control or 3 line SPI control or RS 232 0 5 Option SPI SI E m Option SPI SC f ee oO uw oO uw OPM ys we Fine PW Increasing the incoming voltage decreases the pulse width in the range that was set by DO D1 Amplitude Controls the voltage supply of the OPM LDa for the driver s output stage Og UI UI m In analog In analog 5 7 Laser peak current mon nS K O I I U1 U A Laser avg current V 0 5 x l_avg Out Shall be connected to monitor analog impedance gt 100K ohm 4 Photodiode V YxPo Out Y is according to the monitor power analog specific LD being used Temperature V 1 93 0 027 T C Out Assuming NTC thermistor monitor analog with 10K ohm B 3900 Set temperature Voltage2. 6 bits In case you want the jig board to control the word set the word in the module to 111111 the rotary switch shall be set to FF and the two right switches of S2 to 1 In case you want the module to take control Set the 8 bits in the jig to 1 7 2 Four switches for control functions Left to right Note that these four switched may have parallel switches in the module therefore in case you want the jig to perform the control bring the module s parallel switches to 1 In case you want the module to perform the control bring the jig s switches to 1 TEC enable This switch enables the TEC circuit Driver enable This switch enables the driver including the bias current and some of the module s internal reference voltages AE Address Enable This switch shall be brought to 1 while programming the digital word of the wide pulse generator of the OPM LDa for example 12ns to 270ns RES Reset Bringing this switch to 1 will reset the output of the wide pulse generator of the OPM LDa One of the ordering options of the OPM LDa module includes a generator with 22 bit serial word The AE and RES lines in the jig also support this option 7 3 Laser disable input J11 can be used as an extra disable input for the purpose of lab system safety For OPM LDa short pulse width modules shorting the two pins of J11 disables the optical transmission For OPM LDa long pulse width modules over 12ns shorting
3. User Manual July 2012 OPM oe yo a 8 9 3 The DB9 connector may also be used for connecting to a PC USB port through an USB RS232 adaptor Such adaptor can be plugged directly to the DB9 connector 10 Fan The jig may include a fan only for the evaluation of modules withlarger heat dissipation The fan is not needed for OPM LDa modules but it is required in some of the OPM LD ps modules The air flow of the fan is aimed to the center of the module For proper operation of the fan make sure that the fan has clearance of at least 3cm from any object Don t touch the fan while operating Use a shunt at the J3 jumper to activate the fan 11 Operating instructions 11 1 Make sure the test equipment you use is grounded and the lab has means of ESD protection Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch The following describes the operation of the test jif while using its internal power supplies 11 2 General preparations Connect the ground terminal of the test jig J31 to your system s ground Make sure that the following potentiometers are at minimum Amplitude Bias Set the jumpers J22 J25 J26 J27 to internal mode see paragraph 4 1 Trigger selection Sellect the trigger source J19 and if this is an external trigger connect the trigger input J15 As an ext
4. the two pins of J11 enables the optical transmission Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM ore ee 8 Monitors and LED indicators 8 1 The following monitor points are provided on the jig under the module left to right Ground TP 18 5V TP 19 3 3V generated by the jig TP20 Peak laser current TP21 Average laser current TP22 Power optical TP23 3 3V TP24 Temperature TP 25 3 5V TEC TP 26 Ground TP 27 e Another important monitor point is the 5 to 32V voltage It shall be measured at the F1 fuse e The voltages shall be measured by DVM with input impedance of gt 10K ohm 8 2 The following LED indicators are provided at the right side top to bottom 5V 32V 5V 3 5V TEC 3 3V 3 3V Module OK indicates that the optical power is above the predefined threshold 9 Communication channels 9 1 The DB9 connector J13 is in charge of providing communication channels to the jig It provides RS 232 or SPI serial communication for all AnyPulse modules For RS 232 the following table describes the 9 pins functionality Direction Pint DBS RS 232 Signal Names 1_ Carrier Detector DCD F Data Set Rendy Lose e i 9 2 Some of the pins got dual role to support also SPI bus Pin 3 TD is used as the SPI s SI line pin 4 TDR is used as SPI s SC line and pin 8 CTS is used as SPI s SO line Optical Pulse Machines OPM JIG2_LXX
5. OPM we 1 Test Jig OPM JIG2_LXX User Manual Document date 2July 2012 Contents eR awl We ie Wii Scope am an phot cog iit w Compatibility o 888 Jig board overview J Power options Trigger source and signal connections Top Left side calibrations and jumpers Top side DIP switches Monitors and LED indicators ee os Se Ye a Communication channels 10 Fan 11 Operating instructions Quick start 12 Main connector pin out 1 Scope The scope of this document is to describe the test Jig OPM JIG2_LXX its functionality and operating instructions 2 Compatibility The Test Jig OPM JIG2_LXX supports a range of OPM s products that come in forms of circuit boards or modules 2 1 OPM LDa series cards and modules These products come with or without an integrated laser diode and they perform functions of Adjustable pulse generator with adjustable pulse width from 0 5ns to 1us Depends on installed options Pulse driver Efficient TEC controller 2 2 OPM LDps series cards and modules These products deploy OPM s Anypulse technology and perform functions of Arbitrary waveform generator with sub nanosecond resolution Linear pulse driver Efficient TEC controller Built in or external Laser diode PC software to support pulse programming and monitoring functions Warning the test jig with the module installed in it might emit hazardous laser radiation The user sh
6. age power Power 5 to 32 _ tt C a and logic power Power 4 75 5 25 Required stability 2 n ai U1 Threshold may vary upon Module OK out If optical power monitor exceeds threshold than output goes TTL high customer request Driver enable Enable transmission of short In TTL short 1 12ns pulses lt 12ns Active high pulse e pews 5V TEC 5V supply or Parallel connection to TEC 3 3V TEC 3 3V supply or Parallel connection to TEC specific JIG2 order number 2000 Them Parallel connection to thermistor Them Parallel connection to thermistor Option of the OPM LDa series that allows using the Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 2000 Functionality of the two pins depends on the circuit as a TEC controller for an external thermistor device OPM ys we In direct Incoming pulse is converted to In analog 100 an optical pulse The response AC is not guaranteed to be linear coupled Resets the wide pulse In TTL generator Address enable for In TTL 5 0 5 programming the wide pulse generator 18 Trig in Pulse is initiated by rising edge in TTL 100 055 of incoming trigger 19 DO CD Out DO bit in 8 bit wide pulsewidth TTL in 0 5 Pins 19 to 26 can be used in generator Also DO in 1 12ns generator 3 ways 8 bit parallel pulse 20 D1 Sl TDin D1 bit in 8 bit wide pulsewidth TTL in generator Also D1 in 1
7. al of the module Other power supplies on the jig are 5V 3 3V optional and 3 3V optional The three DC terminal blocks at the bottom of the jig are used for power feeding of voltages individually This is for R amp D purposes The area right to the module is a trigger generator that includes an oscillator circuit with frequency controls The generator triggers the module in various ways internal trigger external trigger or single trigger The SMA connector above the module J15 can be used for direct input to the driver section of OPM LDa modules Under the module there are 10 test points At the right side of the jig there are six LEDs to provide main indications of power and module s failure On the upper right corner a fan can be installed optional The push button switch SW5 and the 8 pin connector J12 on the left are for future use Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM s yo sa 4 Power options The various power inputs through the power jack J28 and the terminal blocks J33 J34 J35 and the jumpers J25 J26 J27 allow multiple power schemes Perform the following described power settings prior to inserting the module to the jig 4 1 Internal voltages The most simple power scheme is based on using the single 110 230 VAC power input and connect the jumpers in the jig properly The internal power supplies in the jig provide the required voltages to the module Jumper J26 connect a
8. all take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM wt wee 3 Jig Board Overview Figure 1 describes the main elements of the test Jig Calibrations with disconnect jumpers Amplilude n ODe git PW Bias 4 poe z ou w ka n R J CJ OPM Jig2 LD DIP Switches Trigger generator pulse widt tO SW3 Disable ea J 0000 1 dio Single pulse tog iS Pia sua DW DH2 TP TPS TP TPS C7 Noo 2 as TP TPH TF9 TPO T Drect input RS 232 SPI R23 Di G 5 52 R24 D2 EE SY bs Ca 3 5V TE R27 he C3 3 3 Y Rs DS C4 CA 3 34 i i 1 R35 DS lt lt lt Optical transmission q Module under test J C C Module Ok Trigger generator QO C 7 Trig output LED indicators ci Int E at U F 5 32V ci C20 power supply Q TPS TP20 T3 2 Pa PH TP25 mPa QO Go Oo amp B O Peok_curr Power 3 39 3 5TEC Avg_cur wana nn nnn nnn n nn nnn Test Points Temp AC power oe ees JSV adj PI 110 230VAC a Iig 53V adj 5V al il g ey 27 ei C_ TEC sel t ia mo a T GID CJi4 oe Pir GND Ext N fi S 4 m Power jack input DC voltages terminal blocks Figure 1 main elements of the test Jig Warning the test jig with the module installed i
9. h a butterfly laser diode that requires a heatsink In order to ensure good heat conduction from the module to the jig board use the three or five mounting screws Installation using an extension cord The extension cord allows flexibility in placement of the module in lab setups or system tests The extension cord standard length is 50cm Other lengths are available too upon request The extension cord is especially usefull when using modules with free space transmission no fiber Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM wth yon 10 Figure 4 shows an installation with an extension cord 11 4 11 4 1 11 4 2 11 4 3 11 5 11 6 Ni a pane we e Cre F gt Figure 4 Using the extension cord Setting the trigger frequency skip this part if you re using direct input You can monitor the trigger frequency using the trigger output signal at the SMA connector J17 In case of using on jig trigger oscillator Set the frequency by tuning the potentiometer R38 and select the frequency range J20 Select internal trigger by the jumper J19 See 5 2 2 for details on frequency ranges In case of using external trigger source Set the external source to the required frequency Levels shall be TTL or LVTTL Select external trigger by the jumper J19 In case of using direct input skip this part if you are using a trigger Some of the OPM LDxxx modules support the feature of direct input If yo
10. horter the pulse width Amplitude An analog voltage control 0 to 2V to change the high voltage at the module s output stage This results in laser current changes with dynamic range of 10 or even more Depends specifically on the module order number Set temperature An analog voltage control 0 to 2 5V to set the laser temperature through the TEC circuit For a typical 10K NTC thermistor the set temperature voltage relationship is Tset 1 93 Vset 0 027 OPM ships the jigs with Vset calibrated to 1 25V corresponds to Tset 25C Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM s yo sa 6 Note that some modules already include potentiometers with the same calibrations In that case in order to ensure proper operation disconnect the jumpers and use the calibration of the module Top side switches 7 1 Switches DO D7 The two left side quad switches form an eight bit word DO D7 to set the pulse width There are two generator circuits in the OPM LDa module that use the same 8 bits A pulse generator with range of 12ns to 270ns and with 1ns resolution A short pulse generator that uses only 2 bits DO and D1 with range of 0 5ns to 12ns The short pulse generator has the fine PW control voltage input pin 27 for fine pulse width calibration The eight bits are connected to the module with pull up resistors This eight bit word can be controlled by either the test jig board or by the module only
11. n it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM s yo sa 3 The unit under test the module shall be inserted in the middle of the test jig either vertically or horizontally with the optical output pointing to the left side The 40 pin connector J16 provides all the power and signaling lines to the unit under test The DB9 connector J13 above the 40 pin connector provides RS 232 or SPI serial communication The connector may also be used for connecting to a PC USB port through an USB RS232 adaptor Such adaptor can be plugged directly to the DB9 connector On the mid top side the eight dip switches SW1 and SW2 are used for programming the pulse width for OPM LDa modules with wide pulse width option The other four DIP switches SW3 perform control functions At the left side of the jig there are 4 calibrations Each calibration is done by a potentiometer and each calibration may be removed by disconnecting a jumper At the left bottom side the jig has a 110 230VAC main power input that feeds an internal 12VDC power supply The output of this power supply is a coaxial power plug that shall be connected by the user to a power jack J28 at the at the lower left side of the jig The area below the LEDs in a variable power supply 5 32V It can be used to control the amplitude sign
12. protection make sure that your external 5V source is set to current limit of 1A Jumper J25 connect a shunt at the lower position This selects the jig s external 3 3V voltage through the terminal block J35 For the operation of OPM LDa series modules the 3 3V voltage is not in use This power input is protected against reverse voltage and against overvoltage by a parallel zener diode For enhanced circuit protection make sure that your external 3 3V source is set to current limit of 2A Jumper J22 connect a shunt at the right position to select externally supplied voltage 5 to 32V through the terminal block J33 This power input is protected against reverse voltage but it is not protected against overvoltage Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM g p 5 Trigger source and signal connections 5 1 You may provide the OPM LDa module the required signal directly through the Direct input J15 J15 is an SMA connector with 50 ohm impedance Do not exceed voltage levels of 3Vpp 5 2 The test jig offers three ways to trigger the module external trigger internal trigger using the jig s internal oscillator or single trigger using a push button switch 5 2 1 5 2 2 External trigger mode Select the trigger source by placing a shunt at jumper J19 left position the trigger comes through an SMA connector J23 The trigger shall be in levels of TTL or LVTTL Internal trigger mode Jumper J19 right posi
13. ra precaution set the frequency range J20 to the low position Insert the fan switch shunt J3 if required Connect the 12V coaxial power plug to the power jack Connect the 110 230V AC power Make sure that the LED indicators for voltages are on Set the required 5 to 32 voltage according to the requirements of the module under test Turn off the power voltage 110 230 VAC or the 12V power jack Coution The OPL LDxxx series modules were not designed for hot insertion When inserting or removing the modules make sure that the power is off Insert the module to the jig See mounting options in 11 3 Make sure that the optical output is oriented to the left side as indicated on the test jig Turn the power voltage on 110 230 VAC or the 12V power jack Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM we A 11 3 Mounting options Vertical installation of the driver board Vertical installation in described in Figure 3 Note that the fiber output is at the left side In order to ensure good heat conduction use the two mounting screws and the brackets 0 be be Ji mn pees Bees 4644 6484 BOBS DDD B OND Figure 3 Vertical mounting Horizontal installation of the driver board Horizontal installation is possible only with some of OPM s module s Note that the fiber output shall always be at the left side of the jig as indicated The horizontal mounting is not suitable for modules wit
14. sets the temperature in analog 5 of the TEC controller p W NI O ae Un Voltage temperature function is V 1 93 0 027 T C _ oo B n 5V TEC Supply for the TEC controller 2000 A a W W W W Ui W Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG2_LXX User Manual July 2012
15. shunt at the upper position this selects the jig s internal 5V voltage Jumper J25 connect a shunt at the upper position this selects the jig s internal 3 3V voltage For the operation of OPM LDa series modules the 3 3V voltage is not in use Jumper J27 connect a shunt at the left position this selects the TEC circuit voltage to be 5V For the operation of modules with no TEC controller this is not in use Jumper J22 connect a shunt at the left position to select internally generated voltage 5 to 32V Jumper J21 If the module under test has a 15V compliance voltage limitation insert a shunt The R40 potentiometer sets the compliance voltage for the laser and controls the optical signal amplitude You can monitor this voltage at the fuse f1 Connect the coaxial power connector of the 110 230VAC power supply to the power jack J28 Connect the 110 230VAC power using an AC power cord 2 wire to the AC power input at the left bottom corner 4 2 For R amp D tests that require variable power supply voltages or special voltage values use the three terminal block connector pairs at the bottom side of the jig J33 J34 J35 Set three jumpers in the following way Jumper J26 connect a shunt at the lower position This selects the jig s external 5V voltage through the terminal block J34 This power input is protected against reverse voltage and against overvoltage by a parallel zener diode For enhanced circuit
16. tion The signal comes from the jig s built in oscillator with tunable frequency in the range of 4KHz to 20MHz The oscillator s frequency is controlled by the potentiometer R38 and the jumper J20 The jumper J20 has three positions See details in figure 2 OPM ships the jigs with frequencies calibrated to 10KHz 100KHz 1MHz depends on the J20 position 5 2 3 5 2 4 Low frequencies 4KHz to 0 2MHz up position Rset vs Desired Output Frequency Mid frequencies 40KHz to 2MHz disconnect the jumper EARS High frequencies 400KHz to 20MHz down position N 1k 10k 100k 1M 10M 100M DESIRED OUTPUT FREQUENGY Hz Figure 2 On board oscillator Single trigger A single trigger activated by a push button can be generated Remove the shunt of the trigger source selector J19 Each push of the SW4 push button generates a single trigger An output trigger monitor is provided at the SMA connector J17 You may use this signal to trigger your oscilloscope 50 ohm or high impedance 6 Left top side calibrations and jumpers At the left top side of the jig there are 4 calibrations Each calibration is done by a potentiometer and each calibration may be removed by disconnecting the near jumper Bias current An analog voltage control 0 to 1V for laser bias current in the range of 0 to 100mA Pulse width An analog voltage control 0 to 2V for fine pulse width up to approx 3ns The higher the voltage the s
17. tude potentiometer R2 to the required pulse amplitude If your module supports this option 11 12 Set the required laser set temperature If your module has a TEC using the potentiometer R1 You can test the set voltage on the jumper j6 The voltage that represent the actual laser temperature can be tested in TP25 The voltage temperature relation depends on the specific module under test In most modules it is T C V 1 93 37 For temperature of 25C the voltage is 1 25V The OPM LDxxx modules come with a provided heat sink that shall provide sufficient heat dissipation in lab conditions 10C to 40C If you use the module in temperatures exceeding this range or if you calibrate the temperature to extreme values you may need to provide improved means to dissipate the heat Fan or an extension to the heatsink 11 13 Set the required bias current If your module has a bias option You can test the set voltage on the jumper j9 The resulting bias current is V 10 Warning the test jig with the module installed in it might emit hazardous laser radiation The user shall take the appropriate safety measures including safety glasses and interlock switch Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM gs oe of 12 Main connector pin out AQ 42 Samtec connector TFM 120 01 L D RA or TFM 120 01 L D Current rating 3 9A 60C 39 3 1 Description Type Max Voltage Comments Current limits V mA Power 5 32V Output st
18. ur module supports this feature Set the required waveform of your external test equipment Make sure you don t exceed voltage swing of 3Vpp Make sure the duty cycle is smaller than the recommended one for the specific module under test typically lt 10 Don t apply trigger signal to the module remove the shunt from J19 Connect an oscilloscope with an optical input to the optical fiber of the module under test Optical Pulse Machines OPM JIG2_LXX User Manual July 2012 OPM ys yo ya 11 11 7 Enable the driver by setting the switches of SW3 to TEC enable 1 Laser enable 1 RES 1 If you have connected the laser disable connector J11 then enable the laser by either disconnecting it or by bringing the signal voltage to TTL 1 state From this point and on use the oscilloscope to monitor the waveform 11 8 For short pulses set the pulse width using the Fine PW potentiometer R4 Turning R4 clockwise decreases the pulse width until it is gone If you don t find a pulse turn R4 all the way in the counter clockwise direction 11 9 For wider pulses gt 12ns use the 8 bit DO D7 generator or the 22bit generator requires SPI interface through the DB9 connector Use the AE line to program the pulse and lock it 11 10 Adjust the amplitude by changing high voltage power supply 5 32V Use the R40 voltage adjust potentiometer If the voltage must be limited to 15V then insert a shunt in J21 11 11 Set the Ampli
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