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Laser diode driver
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- Contents
- Table of Contents
- Bookmarks
Table of Contents
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Warranty
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Technical Support
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Table of Contents
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Introduction
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Specifications
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European Regulatory Notes
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Ec Declaration of Conformity
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DIRECTIVE 2002/95/EC (Rohs)
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Directive 2002/96/Ec (Weee)
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Installation
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Visual Check
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Connecting the Output Module to the Mainframe
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Power Ratings
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Connection to the Power Supply
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Protection from Electric Shock
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Environmental Conditions
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Fuses
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Ac Fuse Replacement
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DC Fuse Replacement
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Fuse Ratings
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Mainframe Front Panel Controls
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Rear Panel Controls
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Output Module Controls and Connectors
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General Information
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Basic Test Arrangement
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Series Resistance
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Polarity Control (-Pn Units Only)
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Current Measurement
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Basic Pulse Control
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Trigger Modes
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Gating Modes
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Load Protection
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Attaching and Detaching Loads
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Changing Parameters When a Load Is Attached
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Start-Up Check-List for Local Control
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Calibration Adjustments - Software Procedures
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Adjusting Amplitude Accuracy
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Programming Your Pulse Generator
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Key Programming Commands
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All Programming Commands
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Mechanical Information
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Top Cover Removal
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Rack Mounting
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Electromagnetic Interference
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Maintenance
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Regular Maintenance
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Cleaning
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Wiring Diagrams
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Wiring of Ac Power
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Pcb 158K - Low Voltage Power Supply, 1/3
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Pcb 158K - Low Voltage Power Supply, 2/3
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Pcb 158K - Low Voltage Power Supply, 3/3
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Pcb 160B - High Voltage DC Power Supply
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Pcb 104D - Keypad / Display Board, 1/3
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Pcb 104D - Keypad / Display Board, 2/3
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Pcb 104D - Keypad / Display Board, 3/3
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Main Wiring
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Appendix A - Low-Value, Low-Inductance, High-Power Resistors
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Suppliers
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Performance Check Sheet
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P.O. BOX 265
OGDENSBURG, NY
U.S.A. 13669-0265
A V T E C H
TEL: 888-670-8729 (USA & Canada) or +1-613-226-5772 (Intl)
FAX: 800-561-1970 (USA & Canada) or +1-613-226-2802 (Intl)
info@avtechpulse.com
INSTRUCTIONS
MODEL AV-107B-B
0 to 2 AMP, 0 to 60 V, 10 ns RISE TIME
LASER DIODE DRIVER
WITH IEEE 488.2 AND RS-232 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
-
http://www.avtechpulse.com/
E L E C T R O N I C S
1 9 7 5
BOX 5120, LCD MERIVALE
X
OTTAWA, ONTARIO
CANADA
L T D .
K2C 3H4
Table ofContents
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Summary of Contents for Avtech AV-107B-B
- Page 1 FAX: 800-561-1970 (USA & Canada) or +1-613-226-2802 (Intl) OTTAWA, ONTARIO U.S.A. 13669-0265 CANADA K2C 3H4 info@avtechpulse.com http://www.avtechpulse.com/ INSTRUCTIONS MODEL AV-107B-B 0 to 2 AMP, 0 to 60 V, 10 ns RISE TIME LASER DIODE DRIVER WITH IEEE 488.2 AND RS-232 CONTROL SERIAL NUMBER: ____________...
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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 SPECIFICATIONS......................7 EUROPEAN REGULATORY NOTES................8 EC DECLARATION OF CONFORMITY..................8 DIRECTIVE 2002/95/EC (RoHS)....................8 DIRECTIVE 2002/96/EC (WEEE)....................8 INSTALLATION......................10 VISUAL CHECK........................10 CONNECTING THE OUTPUT MODULE TO THE MAINFRAME........... 10 POWER RATINGS........................ - Page 4 PCB 104D - KEYPAD / DISPLAY BOARD, 3/3..............41 MAIN WIRING......................... 42 APPENDIX A - LOW-VALUE, LOW-INDUCTANCE, HIGH-POWER RESISTORS..43 SUPPLIERS..........................43 PERFORMANCE CHECK SHEET................44 Manual Reference: Z:\officefiles\instructword\av-107\AV-107B-B,ed2.odt. Last modified June 27, 2006. Copyright © 2006 Avtech Electrosystems Ltd, All Rights Reserved.
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Page 5: Introduction
INTRODUCTION The Model AV-107B-B pulse generator is designed for pulsing laser diode and other low impedance loads with rectangular pulses as high as 2 Amperes into load voltages up to 60V, with 10 ns rise and fall times. The pulse repetition frequency can vary from 1 Hz to 20 kHz, and pulse widths can vary from 20 to 200 ns. - Page 6 The AV-107B-B has two amplitude ranges, of 0 to 0.2A and 0.2 to 2A, allowing the instrument to be used at both moderate and high current levels. (The instrument automatically selects the appropriate range based on the amplitude setting.) The AV-107B-B can be controlled from the front panel, or via a computer connected to the IEEE 488.2-compliant GPIB port, or the RS-232 serial port.
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Page 7: Specifications
SPECIFICATIONS Model AV-107B-B Amplitude 0 to 2 Amps Pulse width (PW): 20 to 200 ns Maximum duty cycle: 0.5% Output regulation: ≤ ±5% change in current for a load voltage change from 0 Volts to maximum rated load voltage Load voltage range:... -
Page 8: European Regulatory Notes
Directive 2002/96/EC categories 1-7 and 10, as stated in the "Article 2 - Scope" section of Directive 2002/95/EC. 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... - Page 9 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.
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Page 10: 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 11: Protection From Electric Shock
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 12: Environmental Conditions
page 2 for contact information) if the instrument requires servicing. Service is to be performed solely by qualified service personnel. ENVIRONMENTAL CONDITIONS This instrument is intended for use under the following conditions: 1. indoor use; 2. altitude up to 2 000 m; 3. -
Page 13: 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 14: 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 15: Mainframe Front Panel Controls
MAINFRAME FRONT PANEL CONTROLS 1. POWER Switch . This is the main power switch. When turning the instrument on, there may be a delay of several seconds before the instrument appears to respond. 2. OVERLOAD Indicator . When the instrument is powered, this indicator is normally green, indicating normal operation. - Page 16 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 17: Rear Panel Controls
REAR PANEL CONTROLS GRN=LNK GATE YEL=ACT TRIG RS-232 GPIB 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. 2. - Page 18 “Programming Manual for -B Instruments” for more details on RS-232 control. 8. LAN Connector and Indicator . (Optional feature. Present on -TNT units only.) The -TNT option "Internet-enables" Avtech pulse generators by adding this standard Ethernet port to the rear panel, in addition to the IEEE-488.2 GPIB and RS-232 ports normally found on "-B"...
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Page 19: Output Module Controls And Connectors
If the load cannot be placed directly on the output terminals of the -PG module, the AV- LZ lines should be used between the -PG module and the load (see the Avtech AV-LZ data sheet, available at www.avtechpulse.com). -
Page 20: General Information
GENERAL INFORMATION BASIC TEST ARRANGEMENT Diode 5-foot 25-pin cable (device under test) OUTPUT AVTECH REAL-TIME MODULE MAINFRAME OSCILLOSCOPE OUT (25 PIN) CONTROL scope probe HV (BNC) CHANNEL A series resistance POWER 5-foot TRIG SYNC RG-58 INPUT OUTPUT coaxial cable The diode is shown oriented for positive (-P) operation. -
Page 21: Series Resistance
SERIES RESISTANCE A series resistance is shown in the diagram of the “Basic Test Arrangement” above. When testing diode loads, this resistance is not strictly necessary, but in practice it is often convenient to add it, for two reasons. Firstly, the voltage across the series resistance can be used to measure the current flowing through the diode load. -
Page 22: Basic Pulse Control
4. The AV-107B-B includes a monitor output connector on the output module. The monitor output should be terminated with a 50 Ohm load. On standard units, the monitor output voltage(V ) is related to the load current (I ) by: ≈... -
Page 23: 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 24: 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. This input can also be set to act synchronously or asynchronously. -
Page 25: Load Protection
LOAD PROTECTION This instrument is designed to pulse resistive and diode loads and will exhibit a large output spike when used to drive a load with significant inductance (as predicted by LENZ'S LAW). For this reason the load should be connected to the output using low inductance leads (as short as possible and as heavy a gauge as possible). -
Page 26: Start-Up Check-List For Local Control
START-UP CHECK-LIST FOR LOCAL CONTROL The instruction manual has been studied thoroughly. The “Local Control” section of the “Programming Manual for -B Instruments” has been studied thoroughly. The output module is connected to the mainframe as shown in the “Basic Test Arrangement”... - Page 27 initially be pointing at the “Output Off” choice. Press MOVE so that the arrow pointer is pointing at the “Output On” choice. (The mainframe is now supplying a trigger to the output module.) Press CHANGE to return to the main menu. 12) Press the MOVE button to move the arrow pointer to the amplitude menu item.
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Page 28: Calibration Adjustments - Software Procedures
CALIBRATION ADJUSTMENTS - SOFTWARE PROCEDURES ADJUSTING AMPLITUDE ACCURACY The AV-107B-B has two amplitude ranges: 0 to 0.2A, and 0.2A to 2A, approximately. The calibration of each range can be adjusted by a few percent if necessary. If it is found that the output amplitude settings (as set by the front-panel controls or programming commands) do not agree exactly with measured values of amplitude (i.e.,... -
Page 29: 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 30: 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 31 :BITS 7 | 8 :ECHO <boolean value> :PARity :[TYPE] EVEN | ODD | NONE :SBITS 1 | 2 :ERRor :[NEXT]? [query only] :COUNT? [query only] :VERSion? [query only] TRIGger: :SOURce INTernal | EXTernal | MANual | HOLD | IMMediate *CLS [no query form] *ESE <numeric value>...
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Page 32: 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 33: 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 34: Wiring Diagrams
. Contac t Avtech if the in stru m en t requi res servic ing. S e rvice is to b e p erfo rm ed W AR NING sol ely by qua lifi ed s ervic e pe rs onne l. -
Page 35: Pcb 158K - Low Voltage Power Supply, 1/3
PCB 158K - LOW VOLTAGE POWER SUPPLY, 1/3 p cb 158 k _ ov p p cb 158 k _ ov p .sch +1 5V +1 5V +1 5V GN D GN D P-OU T # 1 P-OU T # 1 -1 5 V -1 5 V -1 5 V... -
Page 36: Pcb 158K - Low Voltage Power Supply, 2/3
PCB 158K - LOW VOLTAGE POWER SUPPLY, 2/3 8 3 08 3 5 FUSEHO LDER 6 4 04 4 5 -6 TEST-LOO P TEST-LOO P S1 A S1 B, OR D C S2 A, O R DC S2 B 43 4- 13 -1 0 0 M C2 0 C2 1 47 uF,5 0V... -
Page 37: Pcb 158K - Low Voltage Power Supply, 3/3
PCB 158K - LOW VOLTAGE POWER SUPPLY, 3/3 R2 1 1 .5 K O Y CAPBANK 1 N5 3 0 5 1 000 u F,35 V (P5 16 9 -ND ) L6 27 1 1 HV WA RN ING R1 7 SHO RTS OU T B ASE WHEN C HAR GING. -
Page 38: Pcb 160B - High Voltage Dc Power Supply
PCB 160B - HIGH VOLTAGE DC POWER SUPPLY SMA 2 1 -6 4 04 56 -0 SMA 1 HV WA RN ING RELA Y, G 2R-1 -E, 2 4 V TR25 0-0 8 0U 2 0 0 2 00 G6 A -2 -H,12 V 1N4 9 3 7 CHASSIS GND 1 0 0 OY... -
Page 39: Pcb 104D - Keypad / Display Board, 1/3
PCB 104D - KEYPAD / DISPLAY BOARD, 1/3 AH E10 G- ND, Mfg 49 9 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 40: Pcb 104D - Keypad / Display Board, 2/3
PCB 104D - KEYPAD / DISPLAY BOARD, 2/3 U4 A C1 0 PIN3 2 .2 u F C1 3 1 5 K MM7 4H C1 4 N 0 .1 u F 0 .1 u F 0 .1 u F 0 .1u F GN D U4 B C1 1... -
Page 41: Pcb 104D - Keypad / Display Board, 3/3
PCB 104D - KEYPAD / DISPLAY BOARD, 3/3 2 2 uF 0 .1 u F GN D IN T GN D PAD 3 PAD 4 PCF8 57 4A PN LED+ LED- U1 A U1 C MM7 4H C1 4 N MM7 4H C1 4 N 2 .7 OH M, 2W U1 B... -
Page 42: Main Wiring
MAIN WIRING PCB 1 5 8K GN D GN D GN D +2 4V , NO O LO +2 4V , NO O LO GN D + 2 4, NO OLO +5 V GN D +5 V P OS OLO 20 AWG -5 V OLO G ND... -
Page 43: Appendix A - Low-Value, Low-Inductance, High-Power Resistors
Connecting resistors in parallel reduces the total effective resistance and inductance. Avtech does not recommend the use of single, high-power resistors, even if they are low-inductance types. These resistors experience high failure rates in pulsed applications. -
Page 44: Performance Check Sheet
PERFORMANCE CHECK SHEET...
