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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 AVL-5-B
450 VOLT / 5 NS RISE TIME (STD)
400 VOLT / 2.5 NS RISE TIME (OPT)
8 ns TO 100 ns PULSE WIDTH
PULSE GENERATOR
WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL
SERIAL NUMBER:
14551
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Related Manuals for AVTECH ELECTROSYSTEMS AVL-5-B
Summary of Contents for AVTECH ELECTROSYSTEMS AVL-5-B
- Page 1 BOX 5120, LCD MERIVALE http://www.avtechpulse.com/ or +1-613-686-6675 (Worldwide) OTTAWA, CANADA K2C3H5 INSTRUCTIONS MODEL AVL-5-B 450 VOLT / 5 NS RISE TIME (STD) 400 VOLT / 2.5 NS RISE TIME (OPT) 8 ns TO 100 ns PULSE WIDTH PULSE GENERATOR WITH IEEE 488.2 / RS-232 / ETHERNET CONTROL...
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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......................6 HIGH-VOLTAGE PRECAUTIONS................... 7 SPECIFICATIONS......................8 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........................ - Page 4 USE LOW-INDUCTANCE LOADS..................25 PROTECTING YOUR INSTRUMENT................26 TURN OFF INSTRUMENT WHEN NOT IN USE..............26 DO NOT EXCEED 2 kHz......................26 REDUCE AMPLITUDE AND FREQUENCY WHEN POSSIBLE..........26 USE A 50 OHM LOAD......................26 OPERATIONAL CHECK....................27 PROGRAMMING YOUR PULSE GENERATOR............30 KEY PROGRAMMING COMMANDS..................30 ALL PROGRAMMING COMMANDS..................31 MECHANICAL INFORMATION..................
- Page 5 PCB 295G - MAIN CONTROL BOARD, 12 OF 13, TRIGGER SELECT.......53 PCB 295G - MAIN CONTROL BOARD, 13 OF 13, SHIFT REGISTERS......54 MAIN WIRING......................... 55 PERFORMANCE CHECK SHEET................56 Manual Reference: /fileserver1/officefiles/instructword/avl/AVL-5-B,sn14551.odt. Last modified April 1, 2025. Copyright © 2025 Avtech Electrosystems Ltd, All Rights Reserved.
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Page 6: Introduction
Models with the -TR option have faster rise times (< 2.5 ns, 20%-80%), with a slightly reduced maximum amplitude (400V). The AVL-5-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 7: High-Voltage Precautions
HIGH-VOLTAGE PRECAUTIONS CAUTION: This instrument provides output voltages as high as 450 Volts under normal operating conditions, and generates > 1000V 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. The following precautions should always be observed: 1. -
Page 8: Specifications
SPECIFICATIONS Model AVL-5-B AVL-5-B-TR Maximum amplitude 450 V 400 V (50Ω load required Rise time (20%-80%): ≤ 5 ns ≤ 2.5 ns Fall time (80%-20%): ≤ 5 ns Pulse width (FWHM): 8 - 100 ns PRF: 0 to 2 kHz... -
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 2014/30/EU 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
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. Customers who have purchased Avtech equipment through local representatives should consult with the representative to determine who has responsibility for WEEE compliance. -
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 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.
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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. The OUT channel is the signal that is applied to the load. Its amplitude and pulse width are variable. -
Page 22: Main Output
> 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 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 23: 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. When gated, the output will complete the full pulse width if the output is high, and then stop triggering. -
Page 24: Short Circuit Protection
Settings: 10 Hz, 100 ns PW, +450V amplitude. 220 Ohm load. SHORT CIRCUIT PROTECTION The AVL-5-B will withstand short circuits to ground on the output. The photo below shows the output voltage on a 50 Ohm load which has been short circuited with a 12 inch length of mini-grabber patch cord (Pomona 3781-12-2). -
Page 25: Minimizing Waveform Distortions
MINIMIZING WAVEFORM DISTORTIONS USE 50 OHM TRANSMISSION LINES Connect the load to the pulse generator with 50Ω coaxial transmission lines. See the “What Coaxial Cable Should I Use?” application note at http://www.avtechpulse.com/appnote/techbrief6/ for a listing of different possible types of coaxial cable. USE LOW-INDUCTANCE LOADS Lenz’s Law predicts that for an inductive voltage spike will be generated when the current through an inductance changes. -
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
2. Turn on the AVL-5-B. The main menu will appear on the LCD. 3. To set the AVL-5-B to trigger from the internal clock at a PRF of 100 Hz: a) The arrow pointer should be pointing at the frequency menu item. If it is not,... - Page 28 b) Press the CHANGE button. The frequency submenu will appear. Rotate the ADJUST knob until the frequency is set at 100 Hz. 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.
- Page 29 8. To change the output amplitude: a) Press the MOVE button until the arrow pointer is pointing at the amplitude menu item. b) Press the CHANGE button. The amplitude submenu will appear. Rotate the ADJUST knob until the amplitude is set at 200V. c) Observe the oscilloscope.
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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: Pcb 158R6 - Low Voltage Power Supply
PCB 158R6 - LOW VOLTAGE POWER SUPPLY... -
Page 37: Pcb 284D - High-Voltage Power Supply
PCB 284D - HIGH-VOLTAGE POWER SUPPLY... -
Page 38: Pcb 241F - Sync Delay
PCB 241F - SYNC DELAY... -
Page 39: 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 40: Pcb 171C - Main Pulser
PCB 171C - MAIN PULSER... -
Page 41: Pcb 104H - Keypad / Display Board
PCB 104H - KEYPAD / DISPLAY BOARD... -
Page 42: Pcb 295G - Main Control Board, 1 Of 13, Top-Level
PCB 295G - MAIN CONTROL BOARD, 1 OF 13, TOP-LEVEL... -
Page 43: Pcb 295G - Main Control Board, 2 Of 13, Microcontroller Top-Level
PCB 295G - MAIN CONTROL BOARD, 2 OF 13, MICROCONTROLLER TOP-LEVEL... -
Page 44: Pcb 295G - Main Control Board, 3 Of 13, Embedded Controller
PCB 295G - MAIN CONTROL BOARD, 3 OF 13, EMBEDDED CONTROLLER... -
Page 45: Pcb 295G - Main Control Board, 4 Of 13, Gpib Interface
PCB 295G - MAIN CONTROL BOARD, 4 OF 13, GPIB INTERFACE... -
Page 46: Pcb 295G - Main Control Board, 5 Of 13, Dacs
PCB 295G - MAIN CONTROL BOARD, 5 OF 13, DACs... -
Page 47: Pcb 295G - Main Control Board, 6 Of 13, Timing Top-Level
PCB 295G - MAIN CONTROL BOARD, 6 OF 13, TIMING TOP-LEVEL... -
Page 48: Pcb 295G - Main Control Board, 7 Of 13, Gate Circuit
PCB 295G - MAIN CONTROL BOARD, 7 OF 13, GATE CIRCUIT... -
Page 49: Pcb 295G - Main Control Board, 8 Of 13, Oscillator
PCB 295G - MAIN CONTROL BOARD, 8 OF 13, OSCILLATOR... -
Page 50: Pcb 295G - Main Control Board, 9 Of 13, Ttl Outputs
PCB 295G - MAIN CONTROL BOARD, 9 OF 13, TTL OUTPUTS... -
Page 51: Pcb 295G - Main Control Board, 10 Of 13, Delay Circuits
PCB 295G - MAIN CONTROL BOARD, 10 OF 13, DELAY CIRCUITS... -
Page 52: Pcb 295G - Main Control Board, 11 Of 13, Pulse Width Circuit
PCB 295G - MAIN CONTROL BOARD, 11 OF 13, PULSE WIDTH CIRCUIT... -
Page 53: Pcb 295G - Main Control Board, 12 Of 13, Trigger Select
PCB 295G - MAIN CONTROL BOARD, 12 OF 13, TRIGGER SELECT... -
Page 54: Pcb 295G - Main Control Board, 13 Of 13, Shift Registers
PCB 295G - MAIN CONTROL BOARD, 13 OF 13, SHIFT REGISTERS... -
Page 55: Main Wiring
MAIN WIRING... -
Page 56: Performance Check Sheet
PERFORMANCE CHECK SHEET...
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