Avtech AVRH-2-B Instructions Manual
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Avtech AVRH-2-B Instructions Manual

High performance pulse generators with ieee 488.2 / rs-232 / ethernet control
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info@avtechpulse.com
http://www.avtechpulse.com/
A V T E C H
Tel: 888-670-8729 (USA & Canada)
or +1-613-686-6675 (Worldwide)
INSTRUCTIONS
MODEL AVRH-2-B, 2 KILOVOLT
MODEL AVRH-3-B, 3 KILOVOLT
HIGH PERFORMANCE PULSE GENERATORS
WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL
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
14276
E L E C T R O N I C S
1 9 7 5
BOX 5120, LCD MERIVALE
OTTAWA, CANADA K2C3H5
L T D .

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Summary of Contents for Avtech AVRH-2-B

  • Page 1 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 AVRH-2-B, 2 KILOVOLT MODEL AVRH-3-B, 3 KILOVOLT HIGH PERFORMANCE PULSE GENERATORS WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL SERIAL NUMBER: 14276...

  • 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......................5 HIGH-VOLTAGE PRECAUTIONS..................6 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........................
  • Page 4 PCB 197K - HIGH-VOLTAGE POWER SUPPLY..............37 PCB 183A-S AND 183A-P CAPACITOR BANKS..............38 PCB 104H - KEYPAD / DISPLAY BOARD................39 MAIN WIRING........................40 PERFORMANCE CHECKSHEET.................41 Manual Reference: /fileserver2/officefiles/instructword/avrh/AVRH,ed15.odt. Last modified September 16, 2022. Copyright © 2022 Avtech Electrosystems Ltd, All Rights Reserved.

  • Page 5: Introduction

    This instrument is intended for use in research, development, test and calibration laboratories by qualified personnel. AVAILABLE OPTIONS The AVRH-2-B / AVRH-3-B is available with the follow options: -ADPT1 Option: The ADPT1 adapter kit provides an SHV PLUG to MHV FEMALE adapter and an MHV MALE to BNC FEMALE adapter.

  • Page 6: High-Voltage Precautions

    4. Keep in mind that all cables, connectors, oscilloscope probes, and loads must have an appropriate voltage rating. 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.

  • Page 7: Specifications

    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 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)

    < 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 10: 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 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 a power cord, a GPIB cable, and two instrumentation manuals (this manual and the “Programming Manual for -B Instruments”) are with the instrument.

  • Page 12: 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 13: 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 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. 2.
  • Page 17 which lists the key adjustable parameters and their current values. The “Programming Manual for -B Instruments” describes the menus and submenus in detail. 6. KEYPAD . Control Name Function MOVE This moves the arrow pointer on the display. CHANGE This is used to enter the submenu, or to select the operating mode, pointed to by the arrow pointer.

  • Page 18: Rear Panel Controls

    REAR PANEL CONTROLS GATE LOCK 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.
  • Page 19 When triggering externally, the instrument can be set such that the output pulse width tracks the pulse width on this input, or the output pulse width can be set independently. 6. GPIB Connector . A standard GPIB cable can be attached to this connector to allow the instrument to be computer-controlled.

  • Page 20: 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 21 > 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 22: 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”...

  • Page 23: System Description

    SYSTEM DESCRIPTION The AVRH-2-B / AVRH-3-B generates a 2 or 3 kilovolt pulse by first generating a 500 or 750 Volt pulse of the desired width. This pulse is then supplied to a x4 transformer which increases the output amplitude. DC voltages as high as 800 Volts are employed in the generation of the 750 Volt pulse so extreme caution must be employed when repairing this instrument.

  • Page 24: Optional Features

    MALE to BNC FEMALE adapter, as shown below: Plugs into SHV jack on front panel SHV Plug MHV Female BNC Female MHV Male The two adapters may be used together to provide an SHV-to-BNC function for the Avtech AVR-8A and AVRH families of high-voltage pulse generators.

  • Page 25: Protecting Your Instrument

    PROTECTING YOUR INSTRUMENT TURN OFF INSTRUMENT WHEN NOT IN USE The lifetime of the switching elements in the pulse generator module is proportional to the running time of the instrument. For this reason the prime power to the instrument should be turned off when the instrument is not in use. In the case of failure, the switching elements are easily replaced following the procedure described in a following section.

  • Page 26: 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 AVRH-3-B R1, 10 kΩ, > 10 Watts...
  • Page 27 2. Turn on the AVRH-2-B / AVRH-3-B. The main menu will appear on the LCD. 3. To set the AVRH-2-B / AVRH-3-B to trigger from the internal clock at a PRF of 100 a) The arrow pointer should be pointing at the frequency menu item. If it is not, press the MOVE button until it is.
  • Page 28 a) Press the MOVE button until the arrow pointer is pointing at the pulse width menu item. b) Press the CHANGE button. The pulse width submenu will appear. Rotate the ADJUST knob until the pulse width is set at 500 ns. c) The arrow pointer should be pointing at the “Normal”...
  • Page 29 value. This completes the operational check.

  • Page 30: 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 31: All Programming Commands

    *rst (resets the instrument) trigger:source external (selects external triggering) pulse:width in = PW output on (turns on the output) volt:ampl 1500 (sets the amplitude to +1500 V) ("-N" units should use "volt:ampl -1500) 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.
  • Page 32 :COMMunicate :GPIB :ADDRess <numeric value> :SERial :CONTrol :RTS ON | IBFull | RFR :[RECeive] :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...

  • Page 33: 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 34: 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 35: Wiring Diagrams

    WIRING DIAGRAMS WIRING OF AC POWER...

  • Page 36: Pcb 158R7 - Low Voltage Power Supply

    PCB 158R7 - LOW VOLTAGE POWER SUPPLY...

  • Page 37: Pcb 197K - High-Voltage Power Supply

    PCB 197K - HIGH-VOLTAGE POWER SUPPLY...

  • Page 38: Pcb 183A-S And 183A-P Capacitor Banks

    PCB 183A-S AND 183A-P CAPACITOR BANKS 183A-S (SERIES CAPACITOR BANK) 7 2 00 K -ND, Mfg . 7 2 0 0, 4 -4 0 th read stan do ff 3 /8" HV + GN D 7 2 00 K -ND, Mfg . 7 2 0 0, 4 -4 0 th read stan do ff 3 /8" X1 1 7 2 00 K -ND, Mfg .

  • Page 39: Pcb 104H - Keypad / Display Board

    PCB 104H - KEYPAD / DISPLAY BOARD...

  • Page 40: Main Wiring

    MAIN WIRING...

  • Page 41: Performance Checksheet

    PERFORMANCE CHECKSHEET...

This manual is also suitable for:

Avrh-3-b

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