Avtech AVR-5B-B Instructions Manual
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Avtech AVR-5B-B Instructions Manual

500 volt, 10 khz pulse generator with ieee 488.2 and rs-232 control
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A 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
info@avtechpulse.com
Tel: 888-670-8729 (USA & Canada)
BOX 5120, LCD MERIVALE
http://www.avtechpulse.com/
or +1-613-686-6675 (Worldwide)
OTTAWA, CANADA K2C3H5
INSTRUCTIONS
MODEL AVR-5B-B
500 VOLT, 10 kHz PULSE GENERATOR
WITH IEEE 488.2 AND RS-232 CONTROL
SERIAL NUMBER:
14232

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  • Page 1 S I N C E 1 9 7 5 info@avtechpulse.com Tel: 888-670-8729 (USA & Canada) BOX 5120, LCD MERIVALE http://www.avtechpulse.com/ or +1-613-686-6675 (Worldwide) OTTAWA, CANADA K2C3H5 INSTRUCTIONS MODEL AVR-5B-B 500 VOLT, 10 kHz PULSE GENERATOR WITH IEEE 488.2 AND RS-232 CONTROL SERIAL NUMBER: 14232...

  • 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 AVAILABLE OPTIONS.....................6 HIGH-VOLTAGE PRECAUTIONS..................7 SPECIFICATIONS......................8 REGULATORY NOTES....................10 FCC PART 18........................10 EC DECLARATION OF CONFORMITY................10 DIRECTIVE 2011/65/EU (RoHS)...................11 DIRECTIVE 2002/96/EC (WEEE)..................11 FIRMWARE LICENSING.......................12 INSTALLATION......................13 VISUAL CHECK........................13 POWER RATINGS........................ 13 CONNECTION TO THE POWER SUPPLY................13 PROTECTION FROM ELECTRIC SHOCK................14 ENVIRONMENTAL CONDITIONS..................15...
  • Page 4 PCB 104G - KEYPAD / DISPLAY BOARD................45 MAIN WIRING - POSITIVE (-P) OR NEGATIVE (-N) UNITS..........46 MAIN WIRING - DUAL-POLARITY (-PN) UNITS..............47 PERFORMANCE CHECK SHEET.................48 Manual Reference: /fileserver2/officefiles/instructword/avr-5/AVR-5B-B,ed27.odt. Last modified February 15, 2022. Copyright © 2022 Avtech Electrosystems Ltd, All Rights Reserved.

  • Page 5: Introduction

    -XP1 option, or 4% with the -XP2 option). Rise and fall times are fixed at less than 20 ns (or 30 ns for units with the -R50 option). The AVR-5B-B includes an internal trigger source, but it can also be triggered or gated by an external source. A front-panel pushbutton can also be used to trigger the instrument.

  • Page 6: Available Options

    AVAILABLE OPTIONS -HN Option: The standard N-type output connector is replaced with an HN-type connector. -MHV Option: The standard N-type output connector is replaced with an MHV-type connector. -SHV Option: The standard N-type output connector is replaced with an SHV-type connector.

  • Page 7: High-Voltage Precautions

    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.

  • Page 8: Specifications

    SPECIFICATIONS Model AVR-5B-B Amplitude (V 2,13 < 20 to 500 Volts Maximum output current: 10 Amps Output resistance (in series with Standard: Nominally zero (< 2Ω) output): Optional : Nominally zero (< 2Ω), or 50Ω, switchable Rise & fall times (20%-80%) ≤...
  • Page 9 ISO/IEC 17025:2005 accredited calibration laboratory. However, Avtech itself does not claim any accreditation. For applications requiring traceable performance, use a calibrated measurement system rather than relying on the accuracy of the pulse generator settings.

  • Page 10: 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 11: Directive 2011/65/Eu (Rohs)

    < 1000 ppm (0.1% 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...

  • Page 12: Firmware Licensing

    Article 9 of Directive 2002/96/EC. Customers who have purchased Avtech equipment through local representatives should consult with the representative to determine who has responsibility for WEEE compliance. Normally, such responsibilities with lie with the representative, unless other arrangements (under Article 9) have been made.

  • Page 13: 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 a power cord, a GPIB cable, and two instrumentation manuals (this manual and the “Programming Manual for -B Instruments”) are with the instrument.

  • Page 14: Protection From Electric Shock

    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...

  • Page 15: Environmental Conditions

    6. no pollution or only dry, non-conductive pollution. LABVIEW DRIVERS A LabVIEW driver for this instrument is available for download on the Avtech web site, at http://www.avtechpulse.com/labview. A copy is also available in National Instruments' Instrument Driver Library at http://www.natinst.com/.

  • Page 16: 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 17: 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 for standard positive (-P) models: Recommended Replacement Part Nominal Fuses...
  • Page 18 Units with the -XP1 option (all polarities) have different fuse requirements: Recommended Replacement Part Nominal Fuses Mains Rating Case Size Littelfuse Part Digi-Key Stock Voltage Number Number 1.6A, 250V, 115 V 5×20 mm 021801.6HXP F2424-ND Time-Delay #1, #2 (AC) 0.8A, 250V, 230 V 5×20 mm 0218.800HXP...

  • Page 19: 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 20 of +3 Volts to R > 1kΩ with a pulse width of approximately 100 ns. 5. LIQUID CRYSTAL DISPLAY (LCD) . This LCD is used in conjunction with the keypad to change the instrument settings. Normally, the main menu is displayed, which lists the key adjustable parameters and their current values.

  • Page 21: 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 22 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 23: General Information

    GENERAL INFORMATION BASIC PULSE CONTROL This instrument can be triggered by its own internal clock or by an external TTL trigger signal. In either case, two output channels respond to the trigger: OUT and SYNC. The OUT channel is the signal that is applied to the load. Its amplitude and pulse width are variable.
  • Page 24 > 50 ns TRIG TTL LEVELS (external input) (0V and 3V-5V) PROPAGATION DELAY (FIXED) 100 ns, FIXED SYNC OUT 3V, FIXED DELAY > 0 PULSE WIDTH AMPLITUDE, VARIABLE MAIN OUTPUT Figure C As before, if the delay is negative, the order of the SYNC and OUT pulses is reversed. The last figure illustrates the relationship between the signal when an external TTL-level trigger is used in the PW mode.

  • Page 25: Trigger Modes

    TRIGGER MODES This instrument has four trigger 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.

  • Page 26: Preventing Output Stage Failure

    PREVENTING OUTPUT STAGE FAILURE The output stage is protected against overload conditions by an overload circuit and fuses on the main frame back panel. However, the output switching elements may fail if the unit is triggered at a PRF exceeding 10 kHz or at duty cycles resulting in an average output power in excess of 50 Watts.

  • Page 27: Output And Load Impedance (Standard Units)

    250 Volts, from 500 Volts. LOAD IMPEDANCE The AVR-5B-B can provide voltage of up to 500V, and currents of up to 10A. When operated at maximum amplitude, the load impedance must therefore be 500V / 10A = 50Ω, or higher.

  • Page 28: Output And Load Impedance (-R50 Units)

    OUTPUT AND LOAD IMPEDANCE (-R50 UNITS) -R50 OPTION The output impedance (the internal resistance in series with the output) on standard models (without the -R50 option) is low, to allow the pulsers to act as true voltage sources (R ≈ 0Ω), and to maximize the voltage output into 50Ω loads. However, for some applications it may be desirable to have R =50Ω.

  • Page 29: Driving A Diode Load Directly

    = 0Ω = 50Ω = 220Ω LOAD = ∞ LOAD It should be observed that maximum voltages are obtained when R = 0Ω, but transmission line reflections are minimized with R = 50Ω. Also, regardless of the value of R , reflections and ringing are minimized when R = 50Ω.
  • Page 30 Top: +500V pulse, internally (before ROUT) Bottom: resulting +10A current, measured with a CT2 current probe (1V/A).

  • Page 31: Operational Check

    Then read the “Local Control” section of the “Programming Manual for -B Instruments” thoroughly. The “Local Control” section describes the front panel controls used in this operational check - in particular, the MOVE, CHANGE, and ADJUST controls. REAL-TIME AVTECH OSCILLOSCOPE PULSER SCOPE...
  • Page 32 3. Turn on the AVR-5B-B. The main menu will appear on the LCD. 4. To set the AVR-5B-B to trigger from the internal clock at a PRF of 1 kHz:  The arrow pointer should be pointing at the frequency menu item. If it is not, press the MOVE button until it is.
  • Page 33 8. To enable the output:  Press the MOVE button until the arrow pointer is pointing at the output menu item.  Press the CHANGE button. The output submenu will appear.  Press MOVE until the arrow pointer is pointing at the “ON” choice. ...

  • Page 34: 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 35: All Programming Commands

    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 36 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]...

  • Page 37: 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 38: 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 39: Wiring Diagrams

    WIRING DIAGRAMS WIRING OF AC POWER (STANDARD UNITS)

  • Page 40: Wiring Of Dc Power

    WIRING OF DC POWER...

  • Page 41: Pcb 158R6 - Low Voltage Power Supply

    PCB 158R6 - LOW VOLTAGE POWER SUPPLY...

  • Page 42: Pcb 156D - Polarity Control Pcb (-Pn Units)

    PCB 156D - POLARITY CONTROL PCB (-PN UNITS) R2 8 R2 3 "UV- ON" IS HIGH IF: 1) "UV+ HIGH" IS LOW, AND +1 5 V VC C VC C 2) "POL" IS LOW. R1 9 R1 2 0 . 1 u F R1 6 5 6 K SU RF AC E MOUN T , ON B OTTOM.

  • Page 43: Pcb 197J - High Voltage Discharge Circuit

    PCB 197J - HIGH VOLTAGE DISCHARGE CIRCUIT...

  • Page 44: Pcb 183A-S And 183A-P Capacitor Banks

    PCB 183A-S AND 183A-P CAPACITOR BANKS 183A-S (SERIES CAPACIT OR BANK) 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 45: Pcb 104G - Keypad / Display Board

    PCB 104G - KEYPAD / DISPLAY BOARD...

  • Page 46: Main Wiring - Positive (-P) Or Negative (-N) Units

    MAIN WIRING - POSITIVE (-P) OR NEGATIVE (-N) UNITS...

  • Page 47: Main Wiring - Dual-Polarity (-Pn) Units

    MAIN WIRING - DUAL-POLARITY (-PN) UNITS -QD ONLY: TGHLV1K00JE -QD ONLY: TGHLV1K00JE P1-P2,N1-N2: 220uF, 400V P3, N3: JUM PER PADS WIT H #20 BUSBAR -QD UNIT S: HEATSUNK TO REAR PANEL R1-R2, R4-R5 (BOT , UNDER CAPS): 220K OY -QD UNIT S: HEATSUNK TO REAR PANEL R3, R6: UNUSED KEYPAD PCB 183A-S...

  • Page 48: Performance Check Sheet

    PERFORMANCE CHECK SHEET...

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14232

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