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Avtech AVR-3-PW-TEK3-B Instructions Manual

250v/5a, 10 ns rise time, 50v/1a, 0.5 ns rise time dual-output pulse generator for current probe tests
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P.O. BOX 265
OGDENSBURG, NY
U.S.A. 13669-0265
A V T E C H
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
INSTRUCTIONS
MODEL AVR-3-PW-TEK3-B
250V / 5A, 10 ns RISE TIME,
50V / 1A, 0.5 ns RISE TIME
DUAL-OUTPUT PULSE GENERATOR
FOR CURRENT PROBE TESTS
SERIAL NUMBER: ____________
E L E C T R O S Y S T E M S
N A N O S E C O N D
W A V E F O R M
S I N C E
-
http://www.avtechpulse.com/
E L E C T R O N I C S
1 9 7 5
BOX 5120, LCD MERIVALE
X
OTTAWA, ONTARIO
CANADA
L T D .
K2C 3H5

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  • Page 1 FAX: 800-561-1970 (USA & Canada) or +1-613-686-6679 (Intl) OTTAWA, ONTARIO U.S.A. 13669-0265 CANADA K2C 3H5 info@avtechpulse.com http://www.avtechpulse.com/ INSTRUCTIONS MODEL AVR-3-PW-TEK3-B 250V / 5A, 10 ns RISE TIME, 50V / 1A, 0.5 ns RISE TIME DUAL-OUTPUT PULSE GENERATOR FOR CURRENT PROBE TESTS SERIAL NUMBER: ____________...

  • Page 2: Warranty

    Avtech product is found to be defective, Avtech shall at its option repair or replace 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS WARRANTY........................2 TECHNICAL SUPPORT....................2 TABLE OF CONTENTS....................3 INTRODUCTION.......................5 SPECIFICATIONS......................7 REGULATORY NOTES....................8 FCC PART 18.......................... 8 EC DECLARATION OF CONFORMITY..................8 DIRECTIVE 2011/65/EU (RoHS)....................9 DIRECTIVE 2002/96/EC (WEEE)....................9 FIRMWARE LICENSING.......................10 INSTALLATION......................11 VISUAL CHECK........................11 POWER RATINGS........................11 CONNECTION TO THE POWER SUPPLY................11 PROTECTION FROM ELECTRIC SHOCK................12 ENVIRONMENTAL CONDITIONS..................13 FUSES..........................14...
  • Page 4 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 CHECK SHEET.................51 Manual Reference: /fileserver2/officefiles/instructword/avr-3/AVR-3-PW-TEK3-B,ed6.odt. Last modified September 12, 2018. Copyright © 2018 Avtech Electrosystems Ltd, All Rights Reserved.

  • Page 5: Introduction

    (i.e., imperfect transmission lines) required to measure current flow. The AVR-3-PW-TEK3-B is optionally available with an additional output module that is physically suitable for use with the Tektronix CT-1 and CT-2 ultra-fast (i.e., sub- nanosecond rise time) current probes.
  • Page 6 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.

  • Page 7: Specifications

    Indicate desired polarity by suffixing model number with -P or -N (i.e. positive or negative). An optional additional output module is available for "Output 2" of the AVR-3-PW-TEK3-B, which is suitable for use with CT-1 and CT-2 current probes. This output module uses a very short length of de-solderable bus-bar wire (instead of flexible cable) which must be fed through the probe.

  • Page 8: Regulatory Notes

    If interference is observed, check that appropriate well-shielded cabling is used on the output connectors. Contact Avtech (info@avtechpulse.com) for advice if you are unsure of the most appropriate cabling. Also, check that your load is adequately shielded. It may be necessary to enclose the load in a metal enclosure.

  • Page 9: Directive 2011/65/Eu (Rohs)

    < 100 ppm (0.01% by mass) DIRECTIVE 2002/96/EC (WEEE) European customers who have purchased this equipment directly from Avtech will have completed a “WEEE Responsibility Agreement” form, accepting responsibility for WEEE compliance (as mandated in Directive 2002/96/EC of the European Union and local laws) on behalf of the customer, as provided for under Article 9 of Directive 2002/96/EC.

  • Page 10: Firmware Licensing

    compliance. Normally, such responsibilities with lie with the representative, unless other arrangements (under Article 9) have been made. Requirements for WEEE compliance may include registration of products with local governments, reporting of recycling activities to local governments, and financing of recycling activities.

  • Page 11: Installation

    INSTALLATION VISUAL CHECK After unpacking the instrument, examine to ensure that it has not been damaged in shipment. Visually inspect all connectors, knobs, liquid crystal displays (LCDs), and the handles. Confirm that the following items have been supplied with the instrument: A power cord •...

  • Page 12: Protection From Electric Shock

    Warning: Failure to use a grounded outlet may result in injury or death due to electric shock. This product uses a power cord with a ground connection. It must be connected to a properly grounded outlet. The instrument chassis is connected to the ground wire in the power cord.

  • Page 13: Environmental Conditions

    5. 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. Service is to be performed solely by qualified service personnel.

  • Page 14: Fuses

    FUSES This instrument contains four fuses. All are accessible from the rear-panel. Two protect the AC prime power input, and two protect the internal DC power supplies. The locations of the fuses on the rear panel are shown in the figure below: Fuses #1 and #2 Fuse #4 Fuse #3...

  • Page 15: Dc Fuse Replacement

    DC FUSE REPLACEMENT The DC fuses may be replaced by inserting the tip of a flat-head screwdriver into the fuse holder slot, and rotating the slot counter-clockwise. The fuse and its carrier will then pop out. FUSE RATINGS The following table lists the required fuses: Recommended Replacement Part Nominal Fuses...

  • Page 16: Front Panel Controls

    FRONT PANEL CONTROLS 1. POWER Switch . This is the main power switch. When turning the instrument on, there is normally a delay of 10 seconds before anything is shown on the main display, as the internal operating system boots up. If the main menu does not appear after 30 seconds, turn off the instrument and leave it off for at least 60 seconds before applying power again.
  • Page 17 5. SYNC OUT . This connector supplies a SYNC output that can be used to trigger other equipment, particularly oscilloscopes. This signal leads (or lags) the main outputs by a duration set by the "DELAY" controls and has an approximate amplitude of +3 Volts to R >...

  • Page 18: Rear Panel Controls

    REAR PANEL CONTROLS GATE TRIG RS-232 GPIB Note: some connectors may be in different positions than shown above, depending on the exact combination of options ordered. 1. AC POWER INPUT . An IEC-320 C14 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.
  • Page 19 6. GPIB Connector . A standard GPIB cable can be attached to this connector to allow the instrument to be computer-controlled. See the “Programming Manual for -B Instruments” for more details on GPIB control. 7. RS-232 Connector. A standard serial cable with a 25-pin male connector can be attached to this connector to allow the instrument to be computer-controlled.

  • Page 20: General Information

    GENERAL INFORMATION BASIC TEST ARRANGEMENT, WITHOUT OUTPUT MODULES For initial testing of the AVR-3-PW-TEK3-B, the instrument can be operated without the output modules. Both outputs require a 50 Ohm load. OUT1 can be observed on a common "real-time" oscilloscope with a bandwidth of 200 MHz or higher, since the rise time is approximately 10 ns.

  • Page 21: Basic Test Arrangement, With Output Modules

    SAMPLING AVTECH OSCILLOSCOPE AVR-3-PW-TEK3-B BW > 2 GHz OUT1 50 OHM INPUT OUT2 POWER 40 dB ATTENUATOR TRIG TRIG CONNECTOR CONNECTOR ALL CABLES: 50 OHM COAXIAL In the above test setup, all cables, attenuators, and oscilloscope should have bandwidth ratings of at least 2 GHz (and preferably > 10 GHz). The use of 40 dB attenuator at the sampling scope vertical input channel will insure a peak input signal to the sampling scope of less than 1 Volt, to avoid damaging the scope.
  • Page 22 The current probe under test is clamped to the 6" / 15 cm length of RG-316 cable across the "A" and "B" terminals of the output module. Physically, this arrangement is shown below (with a Tektronix A6303 probe): When using OUT2, the basic test arrangement is shown below: AVTECH AVR-3-PW-TEK3-B OSCILLOSCOPE AVTECH AVX-TEK3-TM2 OUT1...

  • Page 23: Output Module Equivalent Circuit

    The OUT1 and OUT2 connectors are different. OUT1 has a BNC connector, and OUT2 has an SMA connector. The output modules have matching connectors, to make it obvious which output module is to be used with which output connector. OUTPUT MODULE EQUIVALENT CIRCUIT The output modules serve two functions: they provide a physically convenient location to which to clamp the current probe under test to, and they contain the resistive load (or termination) which is required to define the current amplitude.

  • Page 24: Ct Option (Avx-Tek3-Ct3)

    -CT OPTION (AVX-TEK3-CT3) The -CT option provides an additional output module that is physically suitable for use with the Tektronix CT-1 and CT-2 ultra-fast (i.e., sub-nanosecond rise time) current probes. It is used with the OUT2 output of the mainframe. A 2 cm length of wire must the fed through the probe under test, and then both ends of the wire must be soldered to the microstrip lines on the PCB.
  • Page 25 100 ns, FIXED SYNC OUT (generated by the 3V, FIXED internal oscillator) DELAY > 0 (0.25 - 250 us) OUT1 AMPLITUDE (0 to 250V) PW2 (50 - 200 ns) AMPLITUDE OUT2 (0 to 50V) If the delay is negative, the order of the SYNC and OUT pulses is reversed: 100 ns, FIXED SYNC OUT (generated by the...

  • Page 26: Trigger Modes

    > 50 ns TRIG TTL LEVELS (external input) (0V and 3V-5V) PROPAGATION DELAY (FIXED) 100 ns, FIXED SYNC OUT 3V, FIXED DELAY > 0 (0.25 - 250 us) OUT1 AMPLITUDE (0 to 250V) PW2 (50 - 200 ns) AMPLITUDE OUT2 (0 to 50V) The delay, pulse width, and frequency (when in the internal mode), of the OUT pulse can be varied with front panel controls or via the GPIB or RS-232 computer interfaces.

  • Page 27: Gating Modes

    GATING MODES Triggering can be suppressed by a TTL-level signal on the rear-panel GATE connector. The 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.

  • Page 28: Typical Results

    TYPICAL RESULTS OUT1 When OUT1 is connected to a 50 Ohm load (using the arrangement shown in the "BASIC TEST ARRANGEMENT, WITHOUT OUTPUT MODULES" section), 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%.

  • Page 29: Out2

    The probe is slower than the input pulse, so the measured rise time is slower. The probe also introduces a small amount of ringing. OUT2 When OUT2 is connected to a high-bandwidth sampling oscilloscope (using the arrangement shown in the "BASIC TEST ARRANGEMENT, WITHOUT OUTPUT MODULES"...
  • Page 30 When OUT2 is connected to the AVX-TEK3-TM2 (using the arrangement shown in the "BASIC TEST ARRANGEMENT, WITH OUTPUT MODULES" section) and a Tektronix P6042 probe system, waveforms similar to the one shown below will be obtained: Pulser settings: 10 kHz, +50V, 200 ns PW. Scope settings: 100 mV/div (= 1 A/div), 40 ns / div.
  • Page 31 Larger values of attenuation (> 6 dB) will reduce the reflections (and the pulse amplitude) further.

  • Page 32: Measurement Accuracy And Calibration

    MEASUREMENT ACCURACY AND CALIBRATION The AVR-3-PW-TEK3-B is a voltage pulser. The output current is defined by the voltage amplitude and the load resistance. The voltage amplitude accuracy is specified to be the greater of ±2% or ±0.5V, when shipped from the factory.

  • Page 33: Operational Check

    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 pointing at the frequency menu item. If it is not, press the MOVE button until it is.
  • Page 34 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. 5. To set the Channel 1 pulse width to 500 ns: a) Press the MOVE button until the arrow pointer is pointing at the "PW1"...
  • Page 35 a) Press the MOVE button until the arrow pointer is pointing at the "AMP1" menu item. b) Press the CHANGE button. The amplitude submenu will appear. Rotate the ADJUST knob until the amplitude is set at 250V. c) Observe the oscilloscope. You should see 500 ns wide, 250V pulses. d) Rotate the ADJUST knob.

  • Page 36: Programming Your Pulse Generator

    PROGRAMMING YOUR PULSE GENERATOR KEY PROGRAMMING COMMANDS The “Programming Manual for -B Instruments” describes in detail how to connect the pulse generator to your computer, and the programming commands themselves. A large number of commands are available; however, normally you will only need a few of these.

  • Page 37: All Programming Commands

    These commands will satisfy 90% of your programming needs. ALL PROGRAMMING COMMANDS For more advanced programmers, a complete list of the available commands is given below. These commands are described in detail in the “Programming Manual for -B Instruments”. (Note: this manual also includes some commands that are not implemented in this instrument.
  • Page 38 :BAUD 1200 | 2400 | 4800 | 9600 | 19200 | 38400 | 57600 | 115200 :ERRor :[NEXT]? [query only] :COUNT? [query only] :VERSion? [query only] TRIGger: :SOURce INTernal | EXTernal | MANual | HOLD | IMMediate *CLS [no query form] *ESE <numeric value>...

  • Page 39: Mechanical Information

    There are 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. Service is to be performed solely by qualified service personnel.

  • Page 40: Maintenance

    MAINTENANCE REGULAR MAINTENANCE This instrument does not require any regular maintenance. On occasion, one or more of the four rear-panel fuses 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.

  • Page 41: Wiring Diagrams

    WIRING DIAGRAMS WIRING OF AC POWER M ains circuits - haz ardous live. Do not attempt any repairs on this instrument beyond the fuse replacement procedures described in the manual . Contact Av tech if the instrument A3 - BLACK requir es serv icing.

  • Page 42: Pcb 158R4 - Low Voltage Power Supply

    PCB 158R4 - LOW VOLTAGE POWER SUPPLY...

  • Page 43: Pcb 235B - High Voltage Dc Power Supply

    PCB 235B - HIGH VOLTAGE DC POWER SUPPLY...

  • Page 44: Pcb 284B - High Voltage Dc Power Supply With Discharge

    PCB 284B - HIGH VOLTAGE DC POWER SUPPLY WITH DISCHARGE...

  • Page 45: Pcb 183A - Capacitor Banks

    PCB 183A - CAPACITOR BANKS 7 2 00 K -ND, Mfg . 7 2 0 0, 4-4 0 th read stando ff 3 /8" HV + GN D 7 2 00 K -ND, Mfg . 7 2 0 0, 4-4 0 th read stando ff 3 /8" X1 1 7 2 00 K -ND, Mfg .

  • Page 46: Pcb 241B - Dual Channel Pulse Width Board

    PCB 241B - DUAL CHANNEL PULSE WIDTH BOARD...

  • Page 47: Pcb 104F - Keypad / Display Board, 1/3

    PCB 104F - KEYPAD / DISPLAY BOARD, 1/3 Amp 5 4 9 9 9 1 0 -1 , 1 0 p in strai g h t h ead er LC D-BU TT LC D-BU TT. SCH SD A SD A SC L SC L GN D...

  • Page 48: Pcb 104F - Keypad / Display Board, 2/3

    PCB 104F - KEYPAD / DISPLAY BOARD, 2/3 U4 A VC C C1 0 VC C BU T1 VC C 2 . 2 u F C1 5 C1 3 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 .

  • Page 49: Pcb 104F - Keypad / Display Board, 3/3

    PCB 104F - KEYPAD / DISPLAY BOARD, 3/3 VC C VC C 0 . 1 u F 2 . 2 u F GN D VC C VC C VC C SD A SD A SC L SC L GN D PA D3 PA D4 PC F8 5 7 4 AN (MU ST HA VE "A"...

  • Page 50: Main Wiring

    MAIN WIRING OLO GND POS OLO M1 0 PS, WITH PCB 23 5B M1 0 PS, WITH PCB 23 5B +60V FIXED 0 TO +100V VAR VPRF 23 5B 23 5B CHANGES REQUIRED ON PCB 241B VSPARE REM OVE R3 (RIN) INST ALL C11 = NOT USED R7 =...

  • Page 51: Performance Check Sheet

    PERFORMANCE CHECK SHEET...

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