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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 AVRK-4-B
750 VOLTS, 6 TO 20 ns PULSE WIDTH
HIGH PERFORMANCE PULSE GENERATOR
WITH IEEE 488.2 AND RS-232 CONTROL
SERIAL NUMBER:
14282
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Summary of Contents for AVTECH ELECTROSYSTEMS AVRK-4-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 AVRK-4-B 750 VOLTS, 6 TO 20 ns PULSE WIDTH HIGH PERFORMANCE PULSE GENERATOR WITH IEEE 488.2 AND RS-232 CONTROL SERIAL NUMBER: 14282...
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Page 2: Warranty
WARRANTY Avtech Electrosystems Ltd. warrants products of its manufacture to be free from defects in material and workmanship under conditions of normal use. If, within one year after delivery to the original owner, and after prepaid return by the original owner, this Avtech product is found to be defective, Avtech shall at its option repair or replace said defective item. -
Page 3: Table Of Contents
TABLE OF CONTENTS WARRANTY........................2 TECHNICAL SUPPORT....................2 TABLE OF CONTENTS....................3 INTRODUCTION......................5 HIGH-VOLTAGE PRECAUTIONS..................6 SPECIFICATIONS......................7 REGULATORY NOTES....................9 FCC PART 18.......................... 9 EC DECLARATION OF CONFORMITY..................9 DIRECTIVE 2011/65/EU (RoHS)...................10 DIRECTIVE 2002/96/EC (WEEE)..................10 FIRMWARE LICENSING.......................11 INSTALLATION......................12 VISUAL CHECK........................12 POWER RATINGS........................ 12 CONNECTION TO THE POWER SUPPLY................12 PROTECTION FROM ELECTRIC SHOCK................13 ENVIRONMENTAL CONDITIONS..................14... - Page 4 PCB 104D - KEYPAD / DISPLAY BOARD, 1/3..............44 PCB 104D - KEYPAD / DISPLAY BOARD, 2/3..............45 PCB 104D - KEYPAD / DISPLAY BOARD, 3/3..............46 MAIN WIRING........................47 PERFORMANCE CHECKSHEET.................48 Manual Reference: /fileserver2/officefiles/instructword/avrk/AVRK-4-B,ed11.odt. Last modified October 12, 2022. Copyright © 2022 Avtech Electrosystems Ltd, All Rights Reserved.
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Page 5: Introduction
“-N” option can generate negative pulses. Instruments with the “-PN” option have switchable polarity. The AVRK-4-B is a highly flexible instrument. Aside from the internal trigger source, it can also be triggered or gated by external TTL-level signals. A front-panel pushbutton or a computer command can also be used to trigger the instrument. -
Page 6: High-Voltage Precautions
HIGH-VOLTAGE PRECAUTIONS CAUTION: This instrument provides output voltages as high as 750 Volts under normal operating conditions, and generates up to 950V internally, so extreme caution must be employed when using this instrument. The instrument should only be used by individuals who are thoroughly skilled in high voltage laboratory techniques. -
Page 7: Specifications
SPECIFICATIONS Model: AVRK-4-B Maximum amplitude 750 V (50Ω load required) Usable amplitude range, Range 1: < 20% to 100% of the maximum specified amplitude standard units: Usable amplitude range, Range 1: < 20% to 100% of the maximum specified amplitude with -LVA option: Range 2: <... - Page 8 For DC offset option suffix model number with -OS. A 50 Ohm load is required. Other loads may damage the instrument. Consult Avtech (info@avtechpulse.com) if you need to drive other load impedances. The maximum amplitude may fall by up to 10% at minimum pulse width, as the rise and fall times become comparable to the pulse width. The fall time varies with amplitude (higher amplitudes produce faster fall times) and pulse width (wider pulse widths produce slower fall times).
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Page 9: Regulatory Notes
This instrument does not normally require regular maintenance to minimize interference potential. However, if loose hardware or connectors are noted, they should be tightened. Contact Avtech (info@avtechpulse.com) if you require assistance. EC DECLARATION OF CONFORMITY Avtech Electrosystems Ltd. P.O. Box 5120, LCD Merivale Ottawa, Ontario Canada K2C 3H5 declare that this pulse generator meets the intent of Directive 2004/108/EG for Electromagnetic Compatibility. -
Page 10: Directive 2011/65/Eu (Rohs)
(also known as “RoHS Recast”). In addition, this declaration of conformity is issued 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. -
Page 11: Firmware Licensing
laws) on behalf of the customer, as provided for under 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 12: 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 13: Protection From Electric Shock
Destination Region Description Option Manufacturer Part Number United Kingdom, Hong Kong, BS 1363, -AC00 Qualtek 370001-E01 Singapore, Malaysia 230V, 50 Hz AS 3112:2000, Australia, New Zealand -AC01 Qualtek 374003-A01 230-240V, 50 Hz Continental Europe, Korea, European CEE 7/7 -AC02 Qualtek 364002-D01 Indonesia, Russia “Schuko”... -
Page 14: Environmental Conditions
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;... -
Page 15: 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 16: 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 17: 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 18 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.
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Page 19: 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 20 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.
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Page 21: 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. OUT. This is the main output. The maximum output voltage is 750V. ... -
Page 22: Trigger Modes
The next figure illustrates the relationship between the signal when an external TTL- level trigger is used: > 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... -
Page 23: Gating Modes
WARNING: The output stage may be damaged if triggered by an external signal at a pulse repetition frequency greater than 1 kHz. 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. -
Page 24: Burst Generation (-Br Option)
Avtech suggests the Mini-Circuits BW-SXXW20+ family of 18 GHz / 20 Watt attenuators for use with the AVRK-4-B. For more information, please see the Avtech application note “How Can I Extend the Amplitude Range to Low Levels?” at http://www.avtechpulse.com/appnote/techbrief11/. Units with the -LVA option include an internally-switched attenuator that extends the minimum useful amplitude down to 4% of the maximum amplitude. - Page 25 > 50 ns TRIG TTL LEVELS (external input) (0 and 3V-5V) PROPAGATION DELAY (FIXED) SYNC OUT BURST COUNT (N), VARIABLE FROM 1 TO 500. PULSE WIDTH DELAY (N = 3, IN THIS EXAMPLE) (VARIABLE) (VARIABLE) MAIN OUTPUT BURST PULSE SEPARATION The burst mode may also be used with the front-panel “Single Pulse”...
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Page 26: 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 27: Operational Check
OPERATIONAL CHECK This section describes a sequence to confirm the basic operation of the instrument. It should be performed after receiving the instrument. It is a useful learning exercise as well. Before proceeding with this procedure, finish reading this instruction manual thoroughly. - Page 28 2. Turn on the AVRK-4-B. The main menu will appear on the LCD. 3. To set the AVRK-4-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 29 a) Press the MOVE button until the arrow pointer is pointing at the output menu item. b) Press the CHANGE button. The output submenu will appear. c) Press MOVE until the arrow pointer is pointing at the “ON” choice. d) Press CHANGE to return to the main menu. 8.
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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
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 32 :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]...
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Page 33: Mechanical Information
MECHANICAL INFORMATION TOP COVER REMOVAL If necessary, the interior of the instrument may be accessed by removing the four Phillips screws on the top panel. With the four screws removed, the top cover may be slid back (and off). Always disconnect the power cord and allow the instrument to sit unpowered for 10 minutes before opening the instrument. -
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: Wiring Of Dc Power
WIRING OF DC POWER... -
Page 37: Pcb 158R7 - Low Voltage Power Supply
PCB 158R7 - LOW VOLTAGE POWER SUPPLY... -
Page 38: Pcb 282C - High-Voltage Power Supply
PCB 282C - HIGH-VOLTAGE POWER SUPPLY... -
Page 39: Pcb 216F - Op Amp Tweaks
PCB 216F - OP AMP TWEAKS... -
Page 40: Pcb 317A - Ampl/Pw Bias
PCB 317A - AMPL/PW BIAS... -
Page 41: Pcb 107E - Burst -Br Option,1/2
PCB 107E - BURST -BR OPTION,1/2 CO N9 VC C STD IDC HEA DER W ITH E JE CTO RS +1 5 V VC C IDC SO CK ET -1 5 V -5 .2 V C3 9 C2 3 C3 4 C3 7 C2 4 4 7 u F,3 5 V... -
Page 42: Pcb 107E - Burst -Br Option, 2/2
PCB 107E - BURST -BR OPTION, 2/2 VC C -5 .2 V VE E VC C 0 . 1 u F PLC C2 0 SO CK ET, 3 M2 0 1 1 B 1 -N D VB B GN D PLC C2 0 SO CK ET, 3 M2 0 1 1 B 1 -N D PIN9 PIN3 -W A S-P IN 4 4... -
Page 43: Burst Mode Wiring (-Br Option)
BURST MODE WIRING (-BR OPTION) -
Page 44: Pcb 104D - Keypad / Display Board, 1/3
PCB 104D - KEYPAD / DISPLAY BOARD, 1/3 AH E10 G- ND, Mfg 499 9 10 -1 , 1 0 pin straig h t h ead er LCD-BUTT LCD-BUTT.SCH GN D GN D VCC-LED VCC-LED BACKLIG HT BACKLIG HT ENCOD ER ENCOD ER.SCH I2 C_ INT I2 C_ INT... -
Page 45: Pcb 104D - Keypad / Display Board, 2/3
PCB 104D - KEYPAD / DISPLAY BOARD, 2/3 U4 A C1 0 PIN3 2 .2 uF C1 5 C1 3 1 5 K MM7 4H C1 4 N 0 .1 uF 0 .1 uF 0 .1 uF 0 .1 uF GN D U4 B C1 1... -
Page 46: Pcb 104D - Keypad / Display Board, 3/3
PCB 104D - KEYPAD / DISPLAY BOARD, 3/3 2 2 uF 0 .1 uF GN D IN T GN D PAD 3 PAD 4 PCF8 5 7 4A PN LED+ LED- U1 A U1 C MM7 4H C1 4 N MM7 4H C1 4 N 2 .7 OH M, 2 W U1 B... -
Page 47: Main Wiring
MAIN WIRING... -
Page 48: Performance Checksheet
PERFORMANCE CHECKSHEET...
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