Avtech AVR-EB4-B-NXPB-SOD123W User manual

INSTRUCTIONS
MODEL AVR-EB4-B-NXPB-SOD123W
+0.5A / -1A REVERSE RECOVERY
MEASUREMENT SYSTEM
WITH 1.5 ns SWITCHING TIME
SERIAL NUMBER: 14258
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
[e-mail]
http://www.avtechpulse.com/
Tel: [phone] (USA & Canada)
or [phone] (Worldwide)
BOX 5120, LCD MERIVALE
OTTAWA, CANADA K2C3H5

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. This warranty does not apply to
units which have been dissembled, modified or subjected to conditions
exceeding the applicable specifications or ratings. This warranty is the extent of
the obligation assumed by Avtech with respect to this product and no other
warranty or guarantee is either expressed or implied.
TECHNICAL SUPPORT
Phone: [phone] (USA & Canada)
or [phone] (Worldwide)
E-mail: [e-mail]
World Wide Web: http://www.avtechpulse.com
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TABLE OF CONTENTS
WARRANTY....................................................................................................................2
TECHNICAL SUPPORT..................................................................................................2
TABLE OF CONTENTS.................................................................................................. 3
INTRODUCTION............................................................................................................. 5
MODEL HISTORY................................................................................................................... 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 ( EEE)............................................................................................9
FIRM ARE LICENSING.......................................................................................................10
INSTALLATION.............................................................................................................11
VISUAL CHECK.................................................................................................................... 11
PO ER RATINGS................................................................................................................11
CONNECTION TO THE PO ER SUPPLY...........................................................................11
PROTECTION FROM ELECTRIC SHOCK...........................................................................12
ENVIRONMENTAL CONDITIONS........................................................................................13
FUSES........................................................................................................................... 14
AC FUSE REPLACEMENT...................................................................................................14
DC FUSE REPLACEMENT...................................................................................................15
FUSE RATINGS....................................................................................................................15
FRONT PANEL CONTROLS........................................................................................ 16
REAR PANEL CONTROLS..........................................................................................18
TIMING CONTROL........................................................................................................ 20
BASIC TIMING CONTROL....................................................................................................20
TRIGGER MODES................................................................................................................ 21
GATING MODES...................................................................................................................21
BASIC AMPLITUDE CONTROL...................................................................................22
SETTING THE AMPLITUDE LEVELS...................................................................................23
AMPLITUDE ACCURACY.....................................................................................................23
INCORRECT ORIENTATION................................................................................................24
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ACCESSIBLE VOLTAGES...................................................................................................24
TEST IGS.................................................................................................................... 25
ALL TEST JIGS..................................................................................................................... 25
AVX-TRR-NXPB-SOD123 TEST JIG.................................................................................25
AVX-TRR-NXPB-SOD128..................................................................................................... 28
TYPICAL RESULTS......................................................................................................29
TYPICAL RESULTS: CMMR1S-02.......................................................................................29
TROUBLESHOOTING.................................................................................................. 32
PROGRAMMING YOUR PULSE GENERATOR...........................................................33
KEY PROGRAMMING COMMANDS....................................................................................33
ALL PROGRAMMING COMMANDS.....................................................................................33
MECHANICAL INFORMATION.....................................................................................36
TOP COVER REMOVAL....................................................................................................... 36
RACK MOUNTING................................................................................................................36
ELECTROMAGNETIC INTERFERENCE..............................................................................36
MAINTENANCE............................................................................................................ 37
REGULAR MAINTENANCE..................................................................................................37
CLEANING............................................................................................................................ 37
TRIGGER DAMAGE.............................................................................................................. 37
WIRING DIAGRAMS.....................................................................................................38
IRING OF AC PO ER.......................................................................................................38
PCB 158R6 - LO VOLTAGE PO ER SUPPLY................................................................39
PCB 168C - HIGH VOLTAGE DC PO ER SUPPLY............................................................40
PCB 201C – SAFETY INTERLOCK......................................................................................41
PCB 241F - SECONDARY PULSE IDTH OR DELAY CONTROL.....................................42
PCB 228D - OP AMP LEVEL SHIFTING..............................................................................43
PCB 104H - KEYPAD / DISPLAY BOARD...........................................................................44
MAIN IRING....................................................................................................................... 45
STANDARD TEST JIG IRING (AVX-TRR-NXPB-SOD123 )...........................................46
TEST JIG IRING (AVX-TRR-NXPB-SOD128)....................................................................47
PERFORMANCE CHECK SHEET................................................................................48
Manual Reference: /fileserver2/officefiles/instructword/avr-eb/avr-eb4-b-nxpa/AVR-EB4-B-NXPB-SOD123W,ed3.odt.
Last modified August 8, 2022.
Copyright © 2022 Avtech Electrosystems Ltd, All Rights Reserved.
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INTRODUCTION
The AVR-EB4-B-NXPB-SOD123W is a high performance, GPIB/RS232/Ethernet-
equipped customized instrument capable of generating a bipolar waveform into a test
jig. Normally, a diode will be placed installed in the jig, allowing diode currents of up to
+0.5A and -1A to be generated. When used with a user-supplied oscilloscope, this
instrument is useful for measuring reverse recovery times (tRR) of 8 ns to 1 us.
The AVR-EB4-B-NXPB-SOD123W mainframe generates two pulses internally, which
are combined using a resistor/capacitor network.
A 100 us wide forward-bias pulse of V1 = +1 to +120V is connected to the mainframe
output through a 175Ω resistance. With a diode DUT (with a forward voltage drop of
VDIODE) and another 25Ω total resistance in the connected jig and oscilloscope, the
forward bias current is given by:
IF = (V1 – VDIODE) / 200Ω, approximately
+0.5A maximum, approximately
80 us after the forward bias pulse starts, a 2 us wide reverse-bias pulse of V2 = -7.5 to -
84V is capacitively coupled to the mainframe output. This generates a current of:
IR = IF + (V2 / 50Ω), approximately
-1A maximum, approximately
The forward-to-reverse switching time is 1.5 ns (10%-90%).
The maximum reverse voltage that will develop across the DUT is:
VRMAX = IR × 50Ω
The DUT breakdown voltage must exceed this value.
The AVR-EB4-B-NXPB-SOD123W includes one AVX-TRR-NXPB-SOD123W diode test
jig. The instrument mainframe is connected to the test jig using two coaxial cables and
one DB-9 control cable. This jig accepts SOD123W packages.
The test jig output should be terminated with 50 Ohms, and connected to a high-
bandwidth (> 400 MHz) oscilloscope. The voltage across this resistance is directly
proportional to the current through the diode. By observing the current waveform
through the diode, the reverse recovery time may be determined.
While the provided test jig is intended to be flexible and easy to use, users can also
develop their own test jigs easily.
The AVR-EB4-B-NXPB-SOD123W may also be provided with different or additional a
customized test jigs, to meet particular customer package requirements.
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The AVR-EB4-B-NXPB-SOD123W 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.
The AVR-EB4-B-NXPB-SOD123W features front panel keyboard and adjust knob
control of the output pulse parameters along with a four line by 40-character backlit
LCD display of the output amplitude, pulse repetition frequency, and delay. The
instrument includes memory to store up to four complete instrument setups. The
operator may use the front panel or the computer interface to store a complete
“snapshot” of all key instrument settings, and recall this setup at a later time.
This instrument is intended for use in research, development, test and calibration
laboratories by qualified personnel.
MODEL HISTORY
The instrument mainframe output has the same waveform electrical specifications as
the previously-supplied customized AVR-EB4-B-NXPB S/N 12432 (supplied in 2011).
The included test jig is different. Jig and pulser differences may cause differences in
measured recovery time values between instruments.
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SPECIFICATIONS
Model1: AVR-EB4-B-NXPB-SOD123W
Recovery type: Reverse recovery
Intended application: High-speed rectifiers
Basic waveform: A positive pulse interrupted by a negative pulse
Pulse polarity: - +
Diode current2,4 (approx.,
depends on VDIODE): -100 mA to -1 A +50 mA to + 500 mA
Pulse width (FWHM): 2 us 100 us
Maximum duty cycle: N/A
Rise time (10%-90%): 1.2 - 1.5 ns typically N/A
Maximum PRF: 1 kHz
Delay: 80 us after start of + pulse N/A
Coaxial cable to test jig
(supplied): Two 2 m / 6 feet, RG-58C/U cables.
Supplied test jig3: Model AVX-TRR-NXPB-SOD123W, for SOD123W packages
Mainframe connectors: Out: SMA
Other: BNC
GPIB and RS-232 control: Standard on -B units. See http://www.avtechpulse.com/gpib for details.
Trigger required: Ext trig mode: + 5 Volts, 10 ns or wider (TTL)
Gate input Active high or low, switchable. Suppresses triggering when active.
Power requirements: 100 - 240 Volts, 50 - 60 Hz
Dimensions: H x W x D: 100 mm x 430 mm x 375 mm (3.9” x 17” x 14.8”)
Chassis material: cast aluminum frame and handles, blue vinyl on aluminum cover plates
Temperature range: +5°C to +40°C
1) -B suffix indicates IEEE-488.2 GPIB and RS-232 control of amplitude, pulse width, PRF and delay (see http://www.avtechpulse.com/gpib).
2) For operation at amplitudes of less than 10% of full-scale, best results will be obtained by setting the amplitude near full-scale and using external
attenuators on the output.
3) Customized jigs available upon request.
4) The amplitude settings should not be relied upon for any degree of accuracy, because the dynamics of the device under test can affect the actual
generated waveforms. Amplitude settings should always be verified by oscilloscope measurements.
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REGULATORY NOTES
FCC PART 18
This device complies with part 18 of the FCC rules for non-consumer industrial,
scientific and medical (ISM) equipment.
This instrument is enclosed in a rugged metal chassis and uses a filtered power entry
module (where applicable). The main output signal is provided on a shielded connector
that is intended to be used with shielded coaxial cabling and a shielded load. Under
these conditions, the interference potential of this instrument is low.
If interference is observed, check that appropriate well-shielded cabling is used on the
output connectors. Contact Avtech ([e-mail]) 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.
If any of the connectors on the instrument are unused, they should be covered with
shielded metal “dust caps” to reduce the interference potential.
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 ([e-mail]) if you require assistance.
EC DECLARATION OF CONFORMITY
We 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. Compliance pertains to the following specifications as
listed in the official Journal of the European Communities:
EN 50081-1 Emission
EN 50082-1 Immunity
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and that this pulse generator meets the intent of the Low Voltage Directive 2006/95/EC.
Compliance pertains to the following specifications as listed in the official Journal of the
European Communities:
EN 61010-1:2001 Safety requirements for electrical equipment for
measurement, control, and laboratory use
DIRECTIVE 2011/65/EU (RoHS)
We Avtech Electrosystems Ltd.
P.O. Box 5120, LCD Merivale
Ottawa, Ontario
Canada K2C 3H5
declare that, to the best of our knowledge, all electrical and electronic equipment (EEE)
sold by the company are in compliance with Directive 2011/65/EU of the European
Parliament and of the Council of 8 June 2011 on the restriction of the use of certain
hazardous substances in electrical and electronic equipment (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.
Material/Substance Threshold level
Lead (Pb) 1000 ppm (0.1% by mass)
Mercury (Hg) 1000 ppm (0.1% by mass)
Hexavalent Chromium (Cr6+) 1000 ppm (0.1% by mass)
Polybrominated Biphenyls (PBB) 1000 ppm (0.1% by mass)
Polybrominated Diphenyl ethers (PBDE) 1000 ppm (0.1% by mass)
Cadmium (Cd) 100 ppm (0.01% by mass)
Bis(2-ethylhexyl) phthalate (DEHP) 1000 ppm (0.1% by mass)
Butyl benzyl phthalate (BBP) 1000 ppm (0.1% by mass)
Dibutyl phthalate (DBP) 1000 ppm (0.1% by mass)
Diisobutyl phthalate (DIBP) 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
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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.
Requirements for WEEE compliance may include registration of products with local
governments, reporting of recycling activities to local governments, and financing of
recycling activities.
FIRMWARE LICENSING
Instruments with firmware versions 5.00 or higher use open-source software internally.
Some of this software requires that the source code be made available to the user as a
condition of its licensing. This source code is available upon request (contact
[e-mail]).
Earlier firmware versions do not contain any open source software.
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