Avtech AVRQ-5-B Instructions Manual Download Page 8 | Manualshive

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HIGH-VOLTAGE PRECAUTIONS

CAUTION:

This instrument provides output voltages as high as 1500 or 2000 Volts

under normal operating conditions, so extreme caution must be employed when using
this instrument. The instrument should only be used by individuals who are thoroughly
skilled in high voltage laboratory techniques. The following precautions should always
be observed:

1. Keep exposed high-voltage wiring to an absolute minimum.

2. Wherever possible, use shielded connectors and cabling.

3. Connect and disconnect loads and cables only when the instrument is turned off.

4. Keep in mind that all cables, connectors, oscilloscope probes, and loads must

have an appropriate voltage rating.

Do not attempt any repairs on the instrument, beyond the fuse replacement procedures
described in this manual. Contact Avtech technical support (see page 2 for contact
information) if the instrument requires servicing.

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Summary of Contents for AVRQ-5-B

Page 1: ...V T E C H E L E C T R O S Y S T E M S L T D N A N O S E C O N D W A V E F O R M E L E C T R O N I C S S I N C E 1 9 7 5 P O BOX 265 OGDENSBURG NY U S A 13669 0265 TEL 888 670 8729 USA Canada or 1 613 686 6675 Intl FAX 800 561 1970 USA Canada or 1 613 686 6679 Intl info avtechpulse com http www avtechpulse com X BOX 5120 LCD MERIVALE OTTAWA ONTARIO CANADA K2C 3H5 ...

Page 2: ...lace said defective item This warranty does not apply to units which have been dissembled modified or subjected to conditions exceeding the applicable specifications or ratings This warranty is the extent of the obligation assumed by Avtech with respect to this product and no other warranty or guarantee is either expressed or implied TECHNICAL SUPPORT Phone 888 670 8729 USA Canada or 1 613 686 667...

Page 3: ...POWER RATINGS 13 CONNECTION TO THE POWER SUPPLY 13 PROTECTION FROM ELECTRIC SHOCK 14 ENVIRONMENTAL CONDITIONS 15 FUSES 16 AC FUSE REPLACEMENT 16 DC FUSE REPLACEMENT 17 FUSE RATINGS 17 CHASSIS CONFIGURATIONS 18 STANDARD CONFIGURATION 18 FPD CONFIGURATION 18 FRONT PANEL CONTROLS UNITS WITHOUT FPD OPTION 19 REAR PANEL CONTROLS UNITS WITHOUT FPD OPTION 21 FRONT PANEL CONTROLS UNITS WITH FPD OPTION 24 ...

Page 4: ...L NEGATIVE RESULTS WITH NO DUT INSTALLED 46 VO3120 RESULTS 47 HCPL 7721 RESULTS 50 TYPICAL WAVEFORMS FOR CUSTOMIZED DAUGHTERBOARDS 53 PCB 298B FOR TLP2366 53 PCB 299B FOR ADUM241E0BRWZ 57 CAPACITIVE INTERFERENCE ISSUES 61 INDUCTIVE SPIKES AND PROBE SATURATION 66 DC CORRECTNESS ISSUES 68 VERIFICATION AND TROUBLESHOOTING 69 SAFETY CONCERNS 71 TURN OUTPUT OFF BEFORE ACCESSING DUT 71 AUTOMATIC TIMEOUT...

Page 5: ...AY BOARD 1 3 83 PCB 104F KEYPAD DISPLAY BOARD 2 3 84 PCB 104F KEYPAD DISPLAY BOARD 3 3 85 DUT WIRING ON MAIN PCB 86 DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C 87 DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B 88 DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B 89 MAIN WIRING 90 PERFORMANCE CHECK SHEET 91 Manual Reference fileserver2 officefiles instructword avrq 5 AVRQ 5 B...

Page 6: ...oating output side power supply The user is responsible for configuring the daughterboards to implement the correct input side power VCC1 biasing filtering loading socketing and glitch measurement The included sample boards implement these requirements for common DIP8 devices using configurable jumpers resistors capacitors A probe point is provided on the main circuit board for observation of the ...

Page 7: ... may use the front panel or the computer interface to store a complete snapshot of all key instrument settings and recall this setup at a later time This instrument is intended for use in research development test and calibration laboratories by qualified personnel 7 ...

Page 8: ...ould always be observed 1 Keep exposed high voltage wiring to an absolute minimum 2 Wherever possible use shielded connectors and cabling 3 Connect and disconnect loads and cables only when the instrument is turned off 4 Keep in mind that all cables connectors oscilloscope probes and loads must have an appropriate voltage rating Do not attempt any repairs on the instrument beyond the fuse replacem...

Page 9: ...panel Single Pulse pushbutton or single pulse trigger via computer command Variable delay Sync to Out 0 to 1 0 seconds for all trigger modes including external trigger Sync output 3 Volts 100 ns will drive 50 Ohm loads Gate input Synchronous active high or low switchable Suppresses triggering when active Other connectors Trig Sync Gate BNC GPIB and RS 232 control Yes Visit http www avtechpulse com...

Page 10: ...g Also check that your load is adequately shielded It may be necessary to enclose the load in a metal enclosure If any of the connectors on the instrument are unused they should be covered with shielded metal dust caps to reduce the interference potential This instrument does not normally require regular maintenance to minimize interference potential However if loose hardware or connectors are not...

Page 11: ...d under the sole responsibility of Avtech Electrosystems Ltd Specifically products manufactured do not contain the substances listed in the table below in concentrations greater than the listed maximum value Material Substance Threshold level Lead Pb 1000 ppm 0 1 by mass Mercury Hg 1000 ppm 0 1 by mass Hexavalent Chromium Cr6 1000 ppm 0 1 by mass Polybrominated Biphenyls PBB 1000 ppm 0 1 by mass P...

Page 12: ...recycling activities to local governments and financing of recycling activities FIRMWARE LICENSING Instruments with firmware versions 5 00 or higher use open source software internally Some of this software requires that the source code be made available to the user as a condition of its licensing This source code is available upon request contact info avtechpulse com Earlier firmware versions do ...

Page 13: ...nstallation Category II instrument intended for operation from a normal single phase supply CONNECTION TO THE POWER SUPPLY An IEC 320 three pronged recessed male socket is provided on the back panel for AC power connection to the instrument One end of the detachable power cord that is supplied with the instrument plugs into this socket The other end of the detachable power cord plugs into the loca...

Page 14: ...tors are prevented access and or are insulated from every connection point In some cases connections must be exposed to potential human contact Operators must be trained to protect themselves from the risk of electric shock This instrument is intended for use by qualified personnel who recognize shock hazards and are familiar with safety precautions required to avoid possibly injury In particular ...

Page 15: ...indoor use 2 altitude up to 2 000 m 3 temperature 5 C to 40 C 4 maximum relative humidity 80 for temperatures up to 31 C decreasing linearly to 50 relative humidity at 40 C 5 Mains supply voltage fluctuations up to 10 of the nominal voltage 6 no pollution or only dry non conductive pollution 15 ...

Page 16: ... the fuses on the rear panel are shown in the figure below AC FUSE REPLACEMENT To physically access the AC fuses the power cord must be detached from the rear panel of the instrument The fuse drawer may then be extracted using a small flat head screwdriver as shown below 16 Fuses 1 and 2 AC fuses Fuse 4 DC fuse Fuse 3 DC fuse Fuse Drawer Pry out the fuse drawer using a screwdriver ...

Page 17: ... Nominal Mains Voltage Rating Case Size Recommended Replacement Part Littelfuse Part Number Digi Key Stock Number 1 2 AC 100 240V 0 5A 250V Time Delay 5 20 mm 0218 500HXP F2416 ND 3 DC N A 1 6A 250V Time Delay 5 20 mm 021801 6HXP F2424 ND 4 DC N A 0 5A 250V Time Delay 5 20 mm 0218 500HXP F2416 ND The recommended fuse manufacturer is Littelfuse http www littelfuse com Replacement fuses may be easil...

Page 18: ...nits enclosure with the DUT area located on the rear panel The DUT area may optionally be moved to the front panel by specifying the FPD option This is more convenient for the user but it increases the height of the instrument from 3U to 5U and higher shipping costs may apply STANDARD CONFIGURATION Front Rear FPD CONFIGURATION Front Rear 18 ...

Page 19: ...e instrument and turn the indicator light yellow The light will stay yellow i e output disabled for about 5 seconds after which the instrument will attempt to re enable the output i e light green for about 1 second If the overload condition persists the output will be disabled again i e light yellow for another 5 seconds If the overload condition has been removed the instrument will resume normal ...

Page 20: ...umeric parameters is displayed this decreases the setting by a factor of ten If one of the adjustable numeric parameters is displayed and this parameter can be both positive or negative this changes the sign of the parameter EXTRA FINE This changes the step size of the ADJUST knob In the extra fine mode the step size is twenty times finer than in the normal mode This button switches between the tw...

Page 21: ...ease see the FUSES sections of this manual for more information 4 GATE This TTL level 0 and 5V logic input can be used to gate the triggering of the instrument This input can be either active high or active low depending on the front panel settings or programming commands The instrument triggers normally when this input is unconnected When set to active high mode this input is pulled down to groun...

Page 22: ...hernet connector allows the instrument to be remotely controlled using the VXI 11 3 ssh secure shell telnet and http web protocols See the Programming Manual for B Instruments for more details 9 DUT Door This is the door that provides access to the daughterboard ZIF socket To open it pull on the chrome knob When closed the door is held latched in place magnetically The high voltage output is autom...

Page 23: ...ide is on the top and the side is on the bottom A differential probe is used to help eliminate noise coupled from the high voltage signals Please note that the P6246 has a maximum differential input voltage range of 7V If higher values of VCC2 are used a different probe will be required If a non differential probe is used it is best to avoid measuring the low voltage DIFF OUT signal at the same ti...

Page 24: ...ration If this indicator is yellow an internal automatic overload protection circuit has been tripped If the unit is overloaded by operating at an exceedingly high duty cycle or by operating into a very low impedance the protective circuit will disable the output of the instrument and turn the indicator light yellow The light will stay yellow i e output disabled for about 5 seconds after which the...

Page 25: ...g by a factor of ten 10 If one of the adjustable numeric parameters is displayed this decreases the setting by a factor of ten If one of the adjustable numeric parameters is displayed and this parameter can be both positive or negative this changes the sign of the parameter EXTRA FINE This changes the step size of the ADJUST knob In the extra fine mode the step size is twenty times finer than in t...

Page 26: ...8 DIFF OUT Connector This two pin header connector connects internally to the logic output of the DUT and the associated ground This is the output that is monitored for glitches caused by high dV dt rates on the common mode voltage It will mate to the Tektronix P6246 differential probe or to standard 0 1 header sockets When using the differential probe install the probe so that the side is on the ...

Page 27: ...hese two fuses protect the internal DC power supplies Please see the FUSES sections of this manual for more information 4 GATE This TTL level 0 and 5V logic input can be used to gate the triggering of the instrument This input can be either active high or active low depending on the front panel settings or programming commands The instrument triggers normally when this input is unconnected When se...

Page 28: ...an be attached to this connector to allow the instrument to be computer controlled A user name admin and a password default as shipped from the factory are required when logging into a serial terminal session The internal controller attempts to auto sense the parity setting It may be necessary to send a few return characters before attempting a login in order to provide enough data to allow this a...

Page 29: ...e the SYNC pulse precedes the HV PULSE pulse When the delay is set to a negative value the SYNC pulse follows the HV PULSE pulse These pulses are illustrated below assuming internal triggering a positive delay and positive amplitude If the delay is negative the order of the SYNC and OUT pulses is reversed 29 SYNC OUT generated by the internal oscillator 100 ns FIXED HV PULSE 3V FIXED PULSE WIDTH 1...

Page 30: ...gger modes Internal Trigger the instrument controls the trigger frequency and generates the clock internally External Trigger the instrument is triggered by an external TTL level clock on the back panel TRIG connector Manual Trigger the instrument is triggered by the front panel SINGLE PULSE pushbutton Hold Trigger the instrument is set to not trigger at all 30 SYNC OUT 100 ns FIXED HV PULSE PULSE...

Page 31: ... instrument can be set to stop triggering when this input high or low using the front panel gate menu or the appropriate programming commands This input can also be set to act synchronously or asynchronously When set to asynchronous mode the GATE will disable the output immediately Output pulses may be truncated When set to synchronous mode the output will complete the full pulse width if the outp...

Page 32: ...point is provided on the main circuit board for observation of the device logic output with a user provided probe and oscilloscope The ground referenced output side power VCC2 is generated by the mainframe and is adjustable 3V to 43V 150 mA maximum The floating input side power is not provided by the mainframe Instead an A23 type 12V battery should be installed on the DUT daughterboard to provide ...

Page 33: ...igned so that the daughterboard can be installed in two positions one for positive pulse mode and one for negative pulse mode This is explained further in the next section DAUGHTERBOARD PINOUT The sample daughterboards have the pinout shown below 33 ...

Page 34: ...IF socket The positive pulse generator ZIF pin 20 applies a pulse to J2 16 and this pulse is also fed to the BNC connector on the panel through a daughterboard track to J2 12 ZIF pin 16 VCC2 is applied to ZIF pin 36 J1 1 Chassis ground GND2 is provided at ZIF pins 21 24 J1 13 16 The ground referenced logic output is provided at ZIF pin 29 J1 8 For negative pulse mode the AMP1 front panel setting m...

Page 35: ...in 3 applies a pulse to J2 3 and this pulse is also fed to the BNC connector on the panel through a daughterboard track to J2 7 ZIF pin 7 VCC2 is applied to ZIF pin 40 J1 1 Chassis ground GND2 is provided at ZIF pins 25 28 J1 13 16 The ground referenced logic output is provided at ZIF pin 33 J1 8 THESE ARE THE ONLY TWO CORRECT POSITIONS DO NOT INSTALL THE DAUGHTERBOARDS IN ANY OTHER WAY 35 4 unuse...

Page 36: ...attery will apply 12V to the regulator IC U2 which provides a floating 5 0V power source VCC1 to the DUT An A23 battery is supplied with each sample daughterboard and additional ones can be easily purchased from Digi Key see stock number N403 ND www digikey com product detail en A23C N403 ND The battery is not required if the DUT does not require a voltage or current bias for example when testing ...

Page 37: ...6 Mates with ZIF socket U2 SOT23 5 LP2985 50DBVR Low dropout 5V regulator VCC1 C6 0805 Yes Load capacitance R1 Zero Ohm Jumper to connect DUT pin 1 to VCC1 R2 Output pullup R3 Resistance to connect DUT pin 2 to VCC1 Non zero resistance for current drive inputs R4 Zero Ohm Jumper for DUT pin 7 as logic output R5 Resistance to connect DUT pin 3 to VCC1 R6 Zero Ohm Jumper for DUT pin 6 as logic outpu...

Page 38: ...ed in their output current rating and can not supply the 2 20 mA typically required to power the floating side of the DUT regardless of their mA hr rating The A23 style 12V battery has an appropriate combination of voltage output current rating and physical size The sample daughterboard uses a simple DIP socket for the DUT rather than the more convenient ZIF style of socket This is done because ZI...

Page 39: ...A23 type battery on the daughterboard Confirm that it is generating 6V once it is installed in the battery holder Open the rear panel DUT door Raise the lever on the left side of the ZIF socket to open the individual pin clamps Using tweezers carefully lower the daughterboard into the left most positive for positive tests or the right most position for negative tests ALWAYS ENSURE THAT THE SILKSCR...

Page 40: ...nd a high current input bias on the LED In the above drawing an HCPL 2601 current drive opto coupler is installed on the daughterboard and the daughterboard is configured to drive the opto coupler input with 16 mA of current using VCC1 and a 220 Ohm resistance The daughterboard is positioned as close as possible to the socket lever in order to connect the daughterboard to the positive pulse circui...

Page 41: ...e above drawing an HCPL 2601 current drive opto coupler is installed on the daughterboard and the daughterboard is configured to drive the opto coupler input with zero current by jumpering pins 2 and 3 to GND1 The daughterboard is positioned as far as possible to the socket lever in order to connect the daughterboard to the negative pulse circuitry 41 ...

Page 42: ...e HV PULSE oscilloscope probe must be rated for operation at 1 5 kV pulsed or higher Factory tests are conducted using a Tektronix P5100 probe which has a 2 5 kV peak rating and a 1000 1 division ratio Remember to adjust the compensation of the probe to match your oscilloscope input INTER CHANNEL INTERFERENCE The test arrangements on the preceding pages show both the high voltage pulse and the log...

Page 43: ...nstalled on the daughterboard as explained in previous sections If a non zero voltage or current bias is required then an A23 type 12V battery must be installed in the battery holder on the daughterboard Please note that A23 batteries have a limited mA hr rating typically 30 mA hr when operating at 15 mA so the battery should be removed immediately after testing and its output should verified to b...

Page 44: ... the GND1 and GND2 signals This capacitance should be added using high voltage 2 kV ceramic capacitors Factory tests are conducted using Vishay Cera Mite 564R series capacitors which are readily available for purchase from Newark Some of the tests below use series or parallel combinations of part number 564R30GAT15 which is a 150 pF 3 kV capacitor http www newark com vishay sprague 564r30gat15 cer...

Page 45: ...ocket in the positive position silkscreen arrows pointing same direction daughterboard is as close as possible to the ZIF lever but with no DUT installed in the DIP8 socket on the daughterboard C 0 pF tR10 90 4 482 ns C 75 pF tR10 90 19 28 ns C 150 pF tR10 90 39 30 ns C 300 pF tR10 90 66 70 ns C 600 pF tR10 90 126 3 ns Positive positioning of daughterboard 45 ...

Page 46: ...ocket in the negative position silkscreen arrows pointing same direction daughterboard is as far as possible from the ZIF lever but with no DUT installed in the DIP8 socket on the daughterboard C 0 pF tR10 90 7 537 ns C 75 pF tR10 90 18 23 ns C 150 pF tR10 90 35 02 ns C 300 pF tR10 90 58 58 ns C 600 pF tR10 90 106 7 ns Negative positioning of daughterboard 46 ...

Page 47: ...to GND1 R11 0 Ω Zero Ohm Jumper to connect DUT pin 4 to GND1 P1 P2 Not used No rise time capacitance added between the CAP pads BT1 One A23 type 12V battery for 10 mA tests not used for 0 mA tests One user installed A23 type 12V battery prime power for VCC1 Please note that A23 batteries have a limited mA hr rating typically 30 mA hr when operating at 15 mA so the battery should be removed immedia...

Page 48: ... Ohms and the A23 battery installed Top side Bottom side With the daughterboard installed in the ZIF socket in the negative position silkscreen arrows pointing same direction daughterboard is as far as possible from the ZIF lever and AMP1 set to 1 5 kV and AMP2 set to 32V these waveforms were obtained 48 ...

Page 49: ...cant logic output glitch for tR10 90 4 588 ns so the CMTI exceeds 1 5 kV 90 10 7 735 ns 155 kV us when IF 10 mA These results show that the VO3120 has very high CMTI tolerance The positive high voltage transition is slightly faster than the negative one 4 5 ns versus 7 5 ns but both exceed the specified transition time of 10 ns 49 ...

Page 50: ... used for 5V input tests 0 Ω for 0V input tests Zero Ohm Jumper to connect DUT pin 2 to GND1 R10 Not used Zero Ohm Jumper to connect DUT pin 3 to GND1 R11 0 Ω Zero Ohm Jumper to connect DUT pin 4 to GND1 P1 P2 150 pF No rise time capacitance added between the CAP pads BT1 One A23 type 12V battery One user installed A23 type 12V battery prime power for VCC1 Please note that A23 batteries have a lim...

Page 51: ...lever and AMP1 set to 1 5 kV and AMP2 set to 5V these waveforms were obtained Top Logic output for 0V input Bottom high voltage pulse Top Logic output for 5V input Bottom high voltage pulse These results show that the HCPL 7721 has a much lower CMTI tolerance than the VO3120 The actual daughterboard and DUT are shown below configured for a 5V logic input Top side 51 ...

Page 52: ...Bottom side 52 ...

Page 53: ...TYPICAL WAVEFORMS FOR CUSTOMIZED DAUGHTERBOARDS The following daughterboards are customized special order items PCB 298B FOR TLP2366 53 ...

Page 54: ...cally R6 0 to connect the DUT pin 5 to the logic output connector and either R8 0 for 0 mA bias or R1 560Ω for 6 mA of bias To obtain the sample waveforms below a Toshiba TLP2366 was tested using VCC2 5V and the following daughterboard configuration including a rise time degradation capacitance Reference Value Typical Function C6 Not used Load capacitance R1 Not used for 0 mA tests 560 Ω for 6 mA ...

Page 55: ...ughterboard is as far as possible from the ZIF lever and AMP1 set to 1 5 kV and AMP2 set to 5V these waveforms were obtained Top Logic output for 0 mA input Bottom high voltage pulse Top Logic output for 6 mA input Bottom high voltage pulse Particularly long output transients a few microseconds in duration are noted when the input is biased with 6 mA The actual daughterboard and DUT are shown belo...

Page 56: ...Top side Bottom side A P6246 differential probe was used to observe the logic outputs in the TLP2366 tests 56 ...

Page 57: ...PCB 299B FOR ADUM241E0BRWZ 57 ...

Page 58: ...forms below an Analog Devices ADUM241E0BRWZ was tested using VCC2 5V and the following daughterboard configuration including a rise time degradation capacitance Reference Value Typical Function R1 0 Ω for 5V input tests not used for 0V input tests Zero Ohm Jumper to connect VIA VIB VIC to VCC1 R2 Not used Zero Ohm Jumper for VOA as logic output R3 Not used Connects VOD to VIA VIB VIC for bidirecti...

Page 59: ...ive position silkscreen arrows pointing same direction daughterboard is as far as possible from the ZIF lever and AMP1 set to 1 5 kV and AMP2 set to 5V these waveforms were obtained Top Logic output for 0V input Bottom high voltage pulse Top Logic output for 5V input Bottom high voltage pulse The actual daughterboard and DUT are shown below configured for a 0V logic input 59 ...

Page 60: ...de Bottom side A P6139A non differential probe was used to observe the logic outputs in the TLP2366 tests because the observed transients substantially exceeded the 7V range of the P6246 differential probe 60 ...

Page 61: ...e a 5V spike on the optocoupler output since 5mA 1kΩ 5V The parasitic capacitance necessary for this to occur may be calculated from I C dV dt C I dt dV C 5mA 4 ns 1500V 90 10 C 0 0167 pF This is an extremely small capacitance that can easily occur through parasitic effects on the daughterboard and external cabling Similar effects can occur in the oscilloscope and its probes through inter channel ...

Page 62: ...sed simultaneously To eliminate the possibility of oscilloscope inter channel interference it is better to record the HV pulse typically using the oscilloscope REF storage function then full disconnect the HV probe from the HV signal and then observe the logic output If this is done the logic signal in last two images become much cleaner Top 1 5 kV HV pulse Bottom Logic out into open circuit no DU...

Page 63: ...us estimate the parasitic capacitance present on the daughterboard A spike on the order of 2V is observed giving I C dV dt C I dt dV C 2V 50 Ohms 4 ns 1500V 90 10 C 0 13 pF This is a physically reasonable value for the parasitic capacitance between the high voltage pulse and output logic signal lines on the daughterboard The effects of capacitive coupling will be especially significant for devices...

Page 64: ...e ratings of these outputs are on the order of tens of milliamps or less the capacitively coupled current may still overwhelm the output transistor current Some optocouplers have output circuits intended for gate drive applications These ICs typically have very high output current ratings or equivalently very low output impedances For instance the VO3120 can source or sink 2 5 Amps As a result the...

Page 65: ... Logic out into open circuit VO3120 R2 R3 348Ω R4 6 10 0 100 ns div Top 1 5 kV HV pulse Bottom Logic out into open circuit VO3120 R2 R3 348Ω R4 6 10 0 100 ns div Note that a low voltage differential logic probe can not be used for the above test unless it is rated to handle a 15V signal Some level of capacitive interference is unavoidable Its magnitude depends on the design of the DUT output circu...

Page 66: ...user in order to identify the best probing arrangement Early versions of the AVRQ 5 B were provided with sample daughterboards P N 267B or earlier The current version is 267C The earlier daughterboards used one pin to connect GND2 to the main board ZIF socket The inductance in the socket pin was sufficient to generate a short voltage spike that could under some circumstances overload the P6246 pro...

Page 67: ... transients keep in mind this possibility of probe saturation Users of AVRQ 5 B models with serial numbers below 13560 may wish to contact Avtech to have the additional pins of the ZIF socket wired for GND2 use to reduce this effect 67 ...

Page 68: ...datasheet says To minimize power dissipation input signals are differentiated and then latched on the output side of the isolation barrier to reconstruct the signal This could result in an ambiguous output state depending on power up shutdown and power loss sequencing Therefore the designer should consider including an initialization signal in the start up circuit Initialization consists of toggli...

Page 69: ...r testing and its output should verified to be between 6V and 12V before each test The high voltage circuits are only on when the instrument is powered on AND the DUT door is closed AND the output has been set to the on state It is NOT possible to measure the drive current or voltage on the floating input side while the high voltage pulse is active It is dangerous and it does not work anyway High ...

Page 70: ...remely sensitive to interference coupled to pin 7 which unwisely provides a connection to the photo transistor base To test this as a possible problem source try snipping off pin 7 on your device and see if that affects the results beneficially If it does you might want to consider designing your own ultra low stray capacitance socket and daughterboard or avoiding sockets entirely and using solder...

Page 71: ...e touching the DUT area For maximum safety turn off the instrument before accessing the DUT area Ensure that the instrument has been turned off for at least 60 seconds before turning it back on to allow the embedded controller to reset properly AUTOMATIC TIMEOUT The output is disabled automatically after 90 seconds of inactivity The timer resets each time a pulse parameter amplitude PRF etc is cha...

Page 72: ...ose as possible to the ZIF lever Confirm that the scope probe test load cables and any adapters used are rated for 1 5 kV 2 kV for XHV units pulsed operation 2 Turn on the AVRQ 5 B The main menu will appear on the LCD 3 To set the AVRQ 5 B to trigger from the internal clock at a PRF of 10 Hz a The arrow pointer should be pointing at the frequency menu item If it is not press the MOVE button until ...

Page 73: ...r Rotate the ADJUST knob until the amplitude is set at 5V c Press CHANGE to return to the main menu 7 At this point nothing should appear on the oscilloscope 8 To enable the output a Press the MOVE button until the arrow pointer is pointing at the output menu item b Press the CHANGE button The output submenu will appear c Press MOVE until the arrow pointer is pointing at the ON choice d Observe th...

Page 74: ...the HV PULSE output are rated for at least 1 5 kV 2 kV for XHV units pulsed operation SHORT CIRCUIT PROTECTION The output will withstand temporary short circuit conditions However short circuit conditions should not be allowed to persist longer than 10 seconds or the stress on the components will shorten the circuit lifetime 74 ...

Page 75: ...re no user adjustable internal circuits For repairs other than fuse replacement please contact Avtech info avtechpulse com to arrange for the instrument to be returned to the factory for repair Caution High voltages over 2000V are present inside the instrument during normal operation Do not operate the instrument with the cover removed Caution Do not remove the internal aluminum lid It shields cer...

Page 76: ... REMOVAL section for instructions on accessing the interior No other cleaning is recommended TRIGGER DAMAGE The rear panel TRIG input used in the external trigger mode is protected by a diode clamping circuit However the protection circuit is not foolproof and it is possible for a grossly excessive signal to damage the trigger circuitry on the main timing control board the 4 10 inch board on the r...

Page 77: ... will turn off automatically 90 seconds later if no further commands are sent before then For triggering a single event this sequence would be more appropriate rst resets the instrument trigger source hold turns off all triggering volt1 1 5 kV sets the HV PULSE amplitude to 1 5 kV volt2 5 0 sets VCC2 to 5 0V output on turns on the output trigger source immediate generates a single non repetitive t...

Page 78: ...ic value GATE TYPE ASYNC SYNC LEVel HIgh LOw VOLTage LEVel IMMediate AMPLitude numeric value EXTernal STATUS OPERation EVENt query only always returns 0 CONDition query only always returns 0 ENABle numeric value implemented but not useful QUEStionable EVENt query only always returns 0 CONDition query only always returns 0 ENABle numeric value implemented but not useful SYSTem COMMunicate GPIB ADDR...

Page 79: ... OPC SAV 0 1 2 3 no query form RCL 0 1 2 3 no query form RST no query form SRE numeric value STB query only TST query only WAI no query form 79 ...

Page 80: ...B UNIT S ONLY Chassis ground post G1 G2 B1 RED G4 G3 L N G X2 CORCOM 6 EGG1 2 POW ER E NT RY MODULE 1 1b 1a 2 2b 2a X1 POW ER SW ITCH SW 32 5 ND CW INDUST RIES GRS 40 22 0013 A1 BROW N A2 BLUE A3 BLACK A4 W HIT E GR N AMB D1 P3 95 ND LE D GR N AMB BL K RE D W H T X5 VCC LE D MOUNT DC FA N FA N1 P9 768 ND FAN NOT C3 P UR C4 GRN Molex 19073 0013 ring terminal 8 Molex 19002 0001 0 250 x 0 032 Protect...

Page 81: ... D GN D 5 V 5 V 24 NO OLO POS OLO POS OLO 20 AW G 24 AW G NEG OLO GND OLO GN D 20 OR 2 4 A W G CA P BA NK GN D HI EXT PS NE GIN GN D GN D GR EEN GND AMB ER DC IN DC IN DC IN GN D GN D GN D 20 AW G PC B 158R 2 HI EXT PS GN D K A J1 J2 J3 J4 J5 J6 J7 J8 J9 FA N J10 GND GND GND 20 AW G C J12 GN D C J8 GN D BD1 PC B 158R 2 OR LATER 2 INSTALL C31 2 2uF CER CHANGES REQUIRED ON PCB 158R2 3 INSTALL C29 C3...

Page 82: ...PCB 158R2 LOW VOLTAGE POWER SUPPLY ...

Page 83: ...d 2015 ddb Documents Panelbrd prj PANELTOP LEVELSCHEMATIC 1 2 3 4 5 6 7 8 9 10 J5 Amp 54999 10 1 10 pin straight head er I2C_INT SC L SDA GND VC C SINGLE PULSE BACKLIGHT ENCODER ENCODER S CH I2C_INT SC L SDA GND VC C SINGLE PULSE BACKLIGHT SDA SC L GND VC C VC C LED BACKLIGHT LC D BUTT LC D BUTT SCH SDA SC L GND VC C VC C LED BACKLIGHT ...

Page 84: ...MUST HAVE A IN P N VC C 1A 1B X2 82 101 71 1 b utton keypad 1 2 U4 A MM74HC 14N 11 10 U1 E MM74HC 14N SINGLE PULSE VC C VC C C1 0 2 2uF C1 1 2 2uF C1 2 2 2uF C9 2 2uF C7 2 2uF C6 2 2uF C1 2 2uF 3 4 U4 B MM74HC 14N 5 6 U4 C MM74HC 14N 9 8 U4 D MM74HC 14N 11 10 U4 E MM74HC 14N 13 12 U4 F MM74HC 14N R1 15K R4 15K 2 3 4 5 6 1 7 8 RN3 460 8X 1 473LF ND R2 100 K VC C 2 3 4 5 6 1 7 8 RN2 460 8X 2 101LF N...

Page 85: ...SDA SC L VC C VC C GND VC C VC C C5 0 1uF 1 2 U1 A MM74HC 14N 13 12 U1 F MM74HC 14N 5 6 U1 C MM74HC 14N PAD3 LED PAD4 LED X3 4 40 MOUNT X1 4 40 MOUNT X9 4 40 MOUNT X8 4 40 MOUNT 3 4 U1 B MM74HC 14N LC D POW E R VC C 2 3 4 5 6 1 7 8 16 9 10 11 12 13 14 15 RN4 481 6P 2 10 2LFC T ND VC C VC C C8 2 2uF R3 22 DB 7 1 DB 6 2 DB 5 3 DB 4 4 DB 3 5 DB 2 6 DB 1 7 DB 0 8 E1 9 R W 10 RS 11 VEE 12 VS S 13 VC C ...

Page 86: ... 1 4 1 5 HV PR OB E 1 6 1 7 1 8 1 9 PU LSE 2 0 GN D 2 1 2 2 2 3 2 4 GN D 2 5 2 6 2 7 2 8 OU T 2 9 3 0 3 1 3 2 OU T 3 3 3 4 3 5 VC C2 3 6 3 7 3 8 3 9 VC C2 4 0 DUT1 ZIF40 SOCKET W ITH UNUS ED PINS FULLY REMOVED P2 TO HV BNC P1 TO HV BNC SHIELD 1 2 J4 SAM1 037 01 ND FOR US ER S LOGIC P ROBE FROM P ULS ER CIRCUITS HV PULS E HV PULS E FROM P OW E R SUPP LY CIRCUITS FOR US ER S HV PROBE GND2 VCC2 LOGIC...

Page 87: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C ...

Page 88: ...DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B ...

Page 89: ...DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B ...

Page 90: ...LAR M PU LSE GN D C E B POL AH V UVN V2 BD 2 PC B 266B AV RQ 5 V1 5V 15V KE EP P ULSE GND S HORT AN D DIRE CT A ND AW AY FR OM P AN ELS AN D OTHE R W IRE S FPD OPT ION NO ELECT RICAL CHANGES BUTPCB 266B IS ROTATED BY 180 DEGREES COMPARED T ONORMAL AND IS LOCATED ATT HE FRONT OU T 1 5 V IN 1 5 V N C N C N C N C N C GN D M1 EAN PC B 228A OU T 1 5 V IN 1 5 V N C N C N C N C N C GN D M2 EAN PC B 228A ...

Page 91: ...PERFORMANCE CHECK SHEET 91 ...

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