Avtech AVR-3-PW-TEK3-B Instructions Manual Download Page 31 | Manualshive

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Larger values of attenuation (> 6 dB) will reduce the reflections (and the pulse
amplitude) further.

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Summary of Contents for AVR-3-PW-TEK3-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: ... CONNECTION TO THE POWER SUPPLY 11 PROTECTION FROM ELECTRIC SHOCK 12 ENVIRONMENTAL CONDITIONS 13 FUSES 14 AC FUSE REPLACEMENT 14 DC FUSE REPLACEMENT 15 FUSE RATINGS 15 FRONT PANEL CONTROLS 16 REAR PANEL CONTROLS 18 GENERAL INFORMATION 20 BASIC TEST ARRANGEMENT WITHOUT OUTPUT MODULES 20 BASIC TEST ARRANGEMENT WITH OUTPUT MODULES 21 OUTPUT MODULE EQUIVALENT CIRCUIT 23 CT OPTION AVX TEK3 CT3 24 BASIC...

Page 4: ...LEANING 40 WIRING DIAGRAMS 41 WIRING OF AC POWER 41 PCB 158R4 LOW VOLTAGE POWER SUPPLY 42 PCB 235B HIGH VOLTAGE DC POWER SUPPLY 43 PCB 284B HIGH VOLTAGE DC POWER SUPPLY WITH DISCHARGE 44 PCB 183A CAPACITOR BANKS 45 PCB 241B DUAL CHANNEL PULSE WIDTH BOARD 46 PCB 104F KEYPAD DISPLAY BOARD 1 3 47 PCB 104F KEYPAD DISPLAY BOARD 2 3 48 PCB 104F KEYPAD DISPLAY BOARD 3 3 49 MAIN WIRING 50 PERFORMANCE CHEC...

Page 5: ...cable and the current probes are clamped around the shorting cables The output modules also contain the 50 Ohm termination The supplied cables and output modules are designed to preserve the fast rise and falls times as much as possible despite the parasitic inductance introduced by the probes and the unshielded connections i e imperfect transmission lines required to measure current flow The AVR ...

Page 6: ...ter 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 6 ...

Page 7: ...dern alternative to GPIB RS 232 See http www avtechpulse com options vxi for details LabView drivers Check for available downloads at http www avtechpulse com labview Power requirements 100 240 Volts 50 60 Hz Dimensions 100 mm x 430 mm x 375 mm 3 9 x 17 x 14 8 Mounting Any Add R5 to the model number to add a rack mount kit Temperature range 5 C to 40 C 1 C suffix indicates stand alone lab instrume...

Page 8: ...ng 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 no...

Page 9: ...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 10: ...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 11: ...ged file a claim immediately with the company that transported the instrument POWER RATINGS This instrument is intended to operate from 100 240 V 50 60 Hz The maximum power consumption is 57 Watts Please see the FUSES section for information about the appropriate AC and DC fuses This instrument is an Installation Category II instrument intended for operation from a normal single phase supply CONNE...

Page 12: ...230V 50 Hz AC06 Qualtek 378001 E01 South Africa India SABS 164 1 220 250V 50 Hz AC17 Volex 2131H 10 C3 Japan JIS 8303 100V 50 60 Hz AC18 Qualtek 397002 01 Israel SI 32 220V 50 Hz AC19 Qualtek 398001 01 China GB 1002 1 220V 50 Hz AC22 Volex 2137H 10 C3 PROTECTION FROM ELECTRIC SHOCK Operators of this instrument must be protected from electric shock at all times The owner must ensure that operators ...

Page 13: ... if the instrument requires servicing Service is to be performed solely by qualified service personnel ENVIRONMENTAL CONDITIONS This instrument is intended for use under the following conditions 1 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 fluctua...

Page 14: ... 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 14 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 15: ... 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 0A 250V Time Delay 5 20 mm 0218001 HXP F2419 ND 4 DC N A 1 0A 250V Time Delay 5 20 mm 0218001 HXP F2419 ND The recommended fuse manufacturer is Littelfuse http www littelfuse com Replacement fuses may be easil...

Page 16: ...f the 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 abOUT1 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 norm...

Page 17: ...s used to enter the submenu or to select the operating mode pointed to by the arrow pointer 10 If one of the adjustable numeric parameters is displayed this increases the setting 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...

Page 18: ...ng 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 ground by a 1 kΩ resistor When set to active low mode this input is pulled up to 5V by a 1 kΩ resistor 5 TRIG This TTL level 0 and 5V logic inpu...

Page 19: ... 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 auto sensing to work A standard Linux agetty process is used to implement serial control internally See the Programming Manual for B Instruments for more details on RS 232 control 8 Net...

Page 20: ... sampling oscilloscope in order to accurately reproduce the very fast 500 ps rise time For testing OUT1 with a real time oscilloscope the instrument should be connected as shown below A high quality low inductance 50 Ohm load is required for the above test arrangement The worst case power dissipation in the load resistor is 3 1 Watts For testing OUT2 with a high bandwidth sampling oscilloscope the...

Page 21: ...both of the output modules will be installed on the outputs When using OUT1 the basic test arrangement is shown below 21 TRIG CONNECTOR AC POWER ALL CABLES 50 OHM COAXIAL 50 OHM INPUT TRIG CONNECTOR 40 dB ATTENUATOR AVTECH AVR 3 PW TEK3 B OUT2 OUT1 SAMPLING OSCILLOSCOPE BW 2 GHz AVTECH AVR 3 PW TEK3 B OUT1 SYNC OUTPUT OUT2 DIRECTION OF CURRENT IN B A PROBE 12 30 cm RG 58 cable OSCILLOSCOPE CHANNEL...

Page 22: ...T1 arrangement except that a different output module is used and a higher bandwidth oscilloscope may be required Physically this arrangement is shown below with a Tektronix P6042 probe 22 AVTECH AVR 3 PW TEK3 B OUT1 SYNC OUTPUT OUT2 DIRECTION OF CURRENT IN B A PROBE 12 30 cm RG 58 cable OSCILLOSCOPE CHANNEL A TRIG INPUT 6 LENGTH OF RG 316 CABLE SUPPLIED AVTECH AVX TEK3 TM2 Depending on the exact c...

Page 23: ... or termination which is required to define the current amplitude The equivalent circuit valid for both output modules is shown below The connectivity of the ground shield of the shorting cable is deliberately broken so that current can not flow in the shield if the cable shield was active it would prevent the current probe from sensing the current on the center conductor 23 IN B A BREAK IN GROUND...

Page 24: ...put channels respond to the trigger OUT1 OUT2 and SYNC OUT1 and OUT2 have independently adjustable amplitude and pulse width settings They share a common trigger source however and the OUT1 and OUT2 pulses are approximately simultaneous The SYNC pulse is a 100 ns wide TTL level reference pulse used to trigger oscilloscopes or other measurement systems When the delay is set to a positive value the ...

Page 25: ... external TTL level trigger is used 25 SYNC OUT generated by the internal oscillator 100 ns FIXED OUT1 PW1 0 25 250 us DELAY 0 AMPLITUDE 0 to 250V 3V FIXED OUT2 PW2 50 200 ns AMPLITUDE 0 to 50V SYNC OUT generated by the internal oscillator 100 ns FIXED DELAY 0 3V FIXED OUT1 PW1 0 25 250 us AMPLITUDE 0 to 250V OUT2 PW2 50 200 ns AMPLITUDE 0 to 50V ...

Page 26: ...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 These modes can be selected using the front panel trigger menu or by using the appropriate programming commands See the Programming Manual for B Instruments for more details 26 SYNC OUT 100 ns FIXED ...

Page 27: ... digikey com stock number J3706 ND The AVX TEK3 TM1 output module is normally connected to the mainframe using a 12 30 cm length of RG 58 coaxial cable The recommended replacement part is the Johnson Components http www johnsoncomponents com 415 0054 012 available readily from Digi Key http www digikey com stock number J6212 ND The AVX TEK3 TM2 output module is normally connected to the mainframe ...

Page 28: ...ained Pulser settings 100 Hz 250V 2 5 us PW Rise Fall reference levels 10 90 When OUT1 is connected to the AVX TEK3 TM1 using the arrangement shown in the BASIC TEST ARRANGEMENT WITH OUTPUT MODULES section and a Tektronix A6303 probe system waveforms similar to the one shown below will be obtained Pulser settings 100 Hz 250V 2 5 us PW Rise Fall reference levels 10 90 Probe scope settings 10 mV 1 A...

Page 29: ...gement shown in the BASIC TEST ARRANGEMENT WITHOUT OUTPUT MODULES section waveforms similar to the one shown below will be obtained Pulser settings 10 kHz 50V 200 ns PW Scope settings 10 V div 50 ns div The next photo shows the same waveform with a finer time scale 1 ns div to show the very fast rising edge 0 5 ns rise time on a 20 80 basis Pulser settings 10 kHz 50V 200 ns PW Scope settings 10 V ...

Page 30: ...bove waveforms immediately after the rising and falling edges The ringing eventually dies out after 80 ns or so The amplitude and switching times can still be measured accurately If the ringing is a problem it can be largely eliminated by adding an attenuator directly on OUT2 SMA connector on the front panel between the SMA connector and the cable going to the output module The attenuator will ten...

Page 31: ...Larger values of attenuation 6 dB will reduce the reflections and the pulse amplitude further 31 ...

Page 32: ... requiring greater accuracy the user can observe and calibrate the voltage output The commands required to update the internal voltage amplitude calibration are described at http www avtechpulse com appnote techbrief5 in the Technical Brief entitled How Can I Calibrate the Amplitude and Offset of my Avtech Pulse Generator LOAD RESISTANCE CALIBRATION The user can also measure the load resistance be...

Page 33: ...probe to the OUT2 connector Set the oscilloscope to trigger externally with the vertical setting at 20 Volts div and the horizontal setting at 100 ns div The oscilloscope should have a bandwidth of at least 500 MHz 2 Turn on the AVR 3 PW TEK3 B The main menu will appear on the LCD 3 To set the AVR 3 PW TEK3 B to trigger from the internal clock at a PRF of 1 kHz a The arrow pointer should be pointi...

Page 34: ...el 2 pulse width to 200 ns a Press the MOVE button until the arrow pointer is pointing at the PW2 menu item b Press the CHANGE button The pulse width submenu will appear Rotate the ADJUST knob until the pulse width is set at 200 ns c The arrow pointer should be pointing at the Normal choice If it is not press MOVE until it is d Press CHANGE to return to the main menu 7 At this point nothing should...

Page 35: ... the CHANGE button The amplitude submenu will appear Rotate the ADJUST knob until the amplitude is set at 50V c Observe the oscilloscope You should see 200 ns wide 50V pulses Due to the very fast rise time of this output some ringing will be observed This is due to limitations of the oscilloscope not the pulser A high bandwidth sampling oscilloscope may be used to confirm this if desired d Rotate ...

Page 36: ...t this sequence would be more appropriate rst resets the instrument trigger source hold turns off all triggering pulse width1 1 us sets the channel 1 pulse width to 1 us pulse width2 150 ns sets the channel 2 pulse width to 150 ns pulse delay 1 us sets the inter channel delay to 1 us output on turns on the output volt ampl1 250 sets the channel 1 amplitude to 250 V volt ampl2 35 sets the channel 2...

Page 37: ...only SOURce FREQuency CW FIXed numeric value SOURce PULSe PERiod numeric value WIDTh numeric value DCYCle numeric value HOLD WIDTh DCYCle DELay numeric value GATE TYPE ASYNC SYNC LEVel HIgh LOw SOURce VOLTage LEVel IMMediate AMPLitude numeric value PROTection TRIPped query only STATUS OPERation EVENt query only always returns 0 CONDition query only always returns 0 ENABle numeric value implemented...

Page 38: ...only VERSion query only TRIGger SOURce INTernal EXTernal MANual HOLD IMMediate CLS no query form ESE numeric value ESR query only IDN query only 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 38 ...

Page 39: ... factory for repair Service is to be performed solely by qualified service personnel Caution High voltages are present inside the instrument during normal operation Do not operate the instrument with the cover removed RACK MOUNTING A rack mounting kit is available The R5 rack mount kit may be installed after first removing the one Phillips screw on the side panel adjacent to the front handle ELECT...

Page 40: ...ses may require replacement All fuses can be accessed from the rear panel See the FUSES section for details CLEANING If desired the interior of the instrument may be cleaned using compressed air to dislodge any accumulated dust See the TOP COVER REMOVAL section for instructions on accessing the interior No other cleaning is recommended 40 ...

Page 41: ...2 PCB104D KEYPADBOARD B UNITS ONLY Chassisgroundpost G1 G2 B1 RED G4 G3 L N G X2 CORCOM 6EGG1 2 POWERENTRY M ODULE 1 1b 1a 2 2b 2a X1 POWERSWITCH SW325 ND CW INDUSTRIES GRS 4022 0013 A1 BROWN A2 BLUE A3 BLACK A4 WHITE GR N AMB D1 P395 NDLED GR N AMB BL K RE D W H T X5 VCCLED M OUNT DC FA N FAN1 P9768 ND FANNO T C3 P UR C4 GRN M olex19073 0013ringterm inal 8 M olex19002 0001 0 250 x0 032 P rotectiv...

Page 42: ...PCB 158R4 LOW VOLTAGE POWER SUPPLY ...

Page 43: ...PCB 235B HIGH VOLTAGE DC POWER SUPPLY ...

Page 44: ...PCB 284B HIGH VOLTAGE DC POWER SUPPLY WITH DISCHARGE ...

Page 45: ...0 thread standoff 3 8 X6 7200K ND Mfg 7200 4 40 thread standoff 3 8 X8 HV WARNING X9 HV WARNING X11 HV WARNING R1 R2 R3 R4 R5 R6 1 2 J1 HV 1 2 J2 HV 1 2 J3 GND 1 2 J4 GND P1 P2 P3 N1 N2 N3 R7 R8 R9 R10 1 2 J5 HV 1 2 J6 HV 1 2 J7 GND 1 2 J8 GND P4 P5 P6 N4 N5 N6 X10 7200K ND Mfg 7200 4 40 thread standoff 3 8 X12 7200K ND Mfg 7200 4 40 thread standoff 3 8 X13 7200K ND Mfg 7200 4 40 thread standoff 3...

Page 46: ...PCB 241B DUAL CHANNEL PULSE WIDTH BOARD ...

Page 47: ...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 48: ...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 49: ...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 50: ...D 5K HORZ POT M 10 S125 A Y 15 OY 18K OY HV HV HV HV GND LV SSR N C VC 235B R3 R5 R6 R7 R8 R9 U1 R10 R11 PS2 M10 PS WITH PCB 235B CHS GND 0 TO 100V VAR 0 TO 260V VAR 241B GN D 1 5 V 1 5 V OU T IN IN SMA OUTSMA RN G VP W 5 V M IN RNG INST ALLC11 BD1 PCB 241B EW HV1 HIGH VOLTAGES 15V REG 15V 5VREG CHANGES REQUIREDON PCB241B REM OVE R3 RIN CHANGES REQUIREDON PCB295D INST ALLC9 6800pF POLY 10 kHz OV T...

Page 51: ...PERFORMANCE CHECK SHEET 51 ...

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