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Avtech AVO-6D-B Instructions Manual

10 amp, 50 ns to 5 us 10 khz laser diode driver with ieee 488.2 / rs-232 / ethernet 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 AVO-6D-B
10 Amp, 50 ns TO 5 us
10 kHz LASER DIODE DRIVER
WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL
SERIAL NUMBER:
14141

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  • 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 AVO-6D-B 10 Amp, 50 ns TO 5 us 10 kHz LASER DIODE DRIVER WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL SERIAL NUMBER: 14141...

  • 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 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 CONNECTING THE OUTPUT MODULE TO THE MAINFRAME..........13...
  • Page 4 PCB 156D - POLARITY CONTROL BOARD (-PN UNITS ONLY)........43 PCB 183A-S AND 183A-P CAPACITOR BANKS..............44 PCB 104G - KEYPAD / DISPLAY BOARD................45 MAIN WIRING........................46 PERFORMANCE CHECK SHEET.................47 Manual Reference: /fileserver2/officefiles/instructword/avo-6/AVO-6D-B,ed11.odt. Last modified July 16, 2021. Copyright © 2021 Avtech Electrosystems Ltd, All Rights Reserved.

  • Page 5: Introduction

    50 ns to 5 us, and the duty cycle may be as high as 0.5%. Rise and fall times are fixed at less than 15 ns. The AVO-6D-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

    The AVO-6D-B is available with several options: -CLZ Option: Alternative output connector arrangement (CLZ style). The output is provided on a DB-9 male connector, suitable for use with the Avtech AV-CLZ11 series of low impedance cables. Includes one AV-CLZ11-100 cable and one AV-CTLX DB-9- to-PCB adapter.

  • Page 7: Specifications

    For monitor option add suffix -M. Add the suffix -CLZ to the model number to specify this output arrangement. For the AVO-6D-B only. The amplitude may decrease ~10% relative to the programmed setting if the instrument is operating at or near the maximum specified duty cycle.

  • 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

    The AVO-6D-T output module must be connected to the “OUT” SMA connector on the rear panel of the mainframe. 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. 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. 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. ×10 If one of the adjustable numeric parameters is displayed, this increases the setting by a factor of ten.

  • 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 AMPLITUDE CONTROL (UNITS WITHOUT -CLZ OPTION) The AVO-6D-B consists of two parts, the mainframe and the output module. The mainframe is a voltage pulser, which generates 0 to 250V (V ). The output module contains a current-doubling / voltage-halving transformer, and a 12.5Ω series resistance.

  • Page 21: Amplitude Control (Units With -Clz Option)

    12 Ohm resistance is NOT contained in the output module. Instead, the user supplies the 12 Ohm resistance, and connects it to the output module using an Avtech AV-CLZ11-60 cable. This special cable has a transmission line characteristic impedance (Z ) of ≈...

  • Page 22: Lenz's Law And Inductive Voltage Spikes

    LOAD BASIC TEST ARRANGEMENT - WITHOUT OUTPUT MODULE The AVO-6D-B can be tested initially without the supplied output module. If the output module is not used, the mainframe output generates up to +250 Volts (for -P units), or up to -250V (for -N units), into a 50 Ohm load, as illustrated below:...

  • Page 23: Basic Test Arrangement - With Output Module

    REAL-TIME AVTECH OSCILLOSCOPE PULSER SCOPE PROBE MAIN OUTPUT CHANNEL A CONNECTOR TEST LOAD POWER TRIG SYNC INPUT OUTPUT ALL CABLES: 50 OHM COAXIAL The load resistor must have a voltage rating of at least 250V, and a power rating of at least 6 Watts.

  • Page 24: Basic Test Arrangement - With -Clz Option

    It must be reverse for negative (-N) units. If the AVO-6D-B is operated at its maximum duty cycle, the worst-case power dissipation in the output module is (250V × 5A × 0.5%) = 6.2 Watts. When operating near 0.5% duty cycle, the output module should be bolted to a heatsink, using the tapped screw holes on the bottom of the module.

  • Page 25: Basic Pulse Control

    FOR POSITIVE (-P) OPERATION. IT SHOULD BE REVERSED FOR NEGATIVE (-N) UNITS. If the AVO-6D-B is operated at its maximum duty cycle, the worst-case power dissipation in the 12 Ohm resistance is ((10A) × 12 Ohms × 0.5%) = 6 Watts.
  • Page 26 OUT channel is the signal that is applied to the load. Its amplitude and pulse width are variable. The SYNC pulse is a fixed-width TTL-level reference pulse used to trigger oscilloscopes or other measurement systems. When the delay is set to a positive value the SYNC pulse precedes the OUT pulse.

  • Page 27: 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 PULSE WIDTH AMPLITUDE, VARIABLE MAIN OUTPUT As before, if the delay is negative, the order of the SYNC and OUT pulses is reversed. 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 28 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 output is high, and then stop triggering.

  • Page 29: Operational Check

    2. Turn on the AVO-6D-B. The main menu will appear on the LCD. 3. To set the AVO-6D-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 30 d) Press CHANGE to return to the main menu. 4. To set the delay to 1 us: a) Press the MOVE button until the arrow pointer is pointing at the delay menu item. b) Press the CHANGE button. The delay submenu will appear. Rotate the ADJUST knob until the delay is set at 1 us.
  • Page 31 Units without the -CLZ option: Diode 2 foot / 60 cm (device coaxial cable Tektronix CT2 current probe or under Pearson 2878 current transformer test) OUTPUT MODULE AVTECH REAL-TIME AVO-6 OSCILLOSCOPE MAIN OUTPUT (ON REAR) CHANNEL A CONNECTOR POWER TRIG SYNC...
  • Page 32 2. Turn on the AVO-6D-B. The main menu will appear on the LCD. 3. To set the AVO-6D-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 33 c) The arrow pointer should be pointing at the “Internal” choice. If it is not, press MOVE until it is. d) Press CHANGE to return to the main menu. 4. To set the delay to 1 ms: a) Press the MOVE button until the arrow pointer is pointing at the delay menu item. b) Press the CHANGE button.
  • Page 34 d) Press CHANGE to return to the main menu. 9. Repeat the last step, but set the amplitude to zero. 10.This completes the operational check.

  • Page 35: 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 36: 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 37 :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 38: 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 39: 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 40: Wiring Diagrams

    WIRING DIAGRAMS WIRING OF AC POWER...

  • Page 41: Pcb 158R5 - Low Voltage Power Supply

    PCB 158R5 - LOW VOLTAGE POWER SUPPLY...

  • Page 42: Pcb 284C - High Voltage Dc Power Supply

    PCB 284C - HIGH VOLTAGE DC POWER SUPPLY...

  • Page 43: Pcb 156D - Polarity Control Board (-Pn Units Only)

    PCB 156D - POLARITY CONTROL BOARD (-PN UNITS ONLY) 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 0 . 1 u F R1 2 R1 6 5 6 K...

  • Page 44: 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 45: Pcb 104G - Keypad / Display Board

    PCB 104G - KEYPAD / DISPLAY BOARD...

  • Page 46: Main Wiring

    MAIN WIRING...

  • Page 47: Performance Check Sheet

    PERFORMANCE CHECK SHEET...

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