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.
TABLE OF CONTENTS WARRANTY........................2 TECHNICAL SUPPORT....................2 TABLE OF CONTENTS....................3 INTRODUCTION.......................6 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........................12 CONNECTION TO THE POWER SUPPLY................12 PROTECTION FROM ELECTRIC SHOCK................13 ENVIRONMENTAL CONDITIONS..................14 FUSES..........................15...
TO-220AC (2 lead) packages, DO-style packages with (leads bent at 90°), and standard and reverse-polarity TO-3 packages. The AVR-EB4-B may also be provided with different or additional a customized test jigs, to meet particular customer package requirements. The diode-under-test is connected in series with a 50 Ohm resistance present on the test jig.
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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 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.
Amplitude settings should always be verified by oscilloscope measurements. 5) Thus the diode must come to forward steady-state within 500 ns. 6) The diode must have a breakdown voltage exceeding these amplitude limits. Contact Avtech for special arrangements if I × 50Ω > V 7) The full forward pulse width is 2 us, but the reverse pulse is super-imposed on the forward pulse 500 ns after the start of the forward pulse.
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.
< 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...
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.
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. If the instrument has been damaged, file a claim immediately with the company that transported the instrument.
The table below describes the power cord that is normally supplied with this instrument, depending on the destination region: 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...
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 be performed solely by qualified service personnel.
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...
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...
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.
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detail. 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.
REAR PANEL CONTROLS GATE TRIG RS-232 CONTROL 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.
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Ohm terminator is suggested for this purpose.) 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.
TIMING CONTROL BASIC TIMING 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: PULSE and SYNC. The PULSE output is a bipolar signal that may either drive a 50 Ohm load, or the test jig described later.
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100 ns, FIXED SYNC OUT (generated by the 3V, FIXED internal oscillator) DELAY < 0 PW 1 PW 2 AMP1 (+), VARIABLE Mainframe OUT AMP2 (-), VARIABLE Figure B The next figure illustrates the relationship between the signal when an external TTL- level trigger is used: >...
TRIGGER MODES This instrument has four trigger modes: Internal Trigger: the instrument controls the trigger frequency, and generates the clock internally. External Trigger: the instrument is triggered by an external TTL-level clock on the back-panel TRIG connector. Manual Trigger: the instrument is triggered by the front-panel “SINGLE PULSE” pushbutton.
BASIC AMPLITUDE CONTROL The basic test arrangement for the AVR-EB4-B is shown in the figure below. The PULSE output on the instrument mainframe is connected to the PULSE input on the test jig (model AVX-TRR-MIX, or a customized variant) using the supplied coaxial cable, and the control cable is connected using the supplied DB-9 cable.
V A = I DUT × 50Ω where I is the current through the device under test. A 450 Ohm resistance (R ) is present in series with the measurement output. When a 50 Ohm resistance (R ) is installed on the output (by the user), the output voltage will be one-tenth of V due to the resistor-divider effect.
words, the I ratio is irrelevant). The capacitance may be so small that it REVERSE IFORWARD becomes impossible to obtain the full -4 Amps of reverse current. Normally, the forward and reverse amplitudes should be set near the maximum values (+100V, -200V).
the reflections, placing them well after the transient where they may be ignored. A 5- meter-long cable is supplied for this purpose. For “soft-switching” diodes, the shortest possible cable length should be used. The 60-cm-long coaxial cable should be used for these applications. When a “soft switching” diode nears the end of its reverse transient, the diode turns off more gradually.
STANDARD TEST JIG MECHANICAL ASPECTS One AVX-TRR-MIX test jig is normally supplied with the mainframe, unless the customer has requested a different or additional test jigs. AVX-TRR-MIX TEST JIG The AVX-TRR-MIX test jig accepts a range of through-hole and axial devices, using pin sockets and spring-loaded pins.
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The instrument and the DUT will not be damaged if the diode is installed with the incorrect orientation (i.e., with the anode and cathode reversed). However, incorrect waveforms will be generated. The procedure for inserting most axial and TO-220 packages is straightforward. Simply insert the DUT between one of the Anode pin sockets (in the blue area above) and one of the Cathode sockets (in the red area above).
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For TO-3 packages with Case = Cathode The anode pin of interest must be inserted into this socket. For dual- diode devices, rotate the TO-3 package so that the desired diode anode is inserted here. This spring pin must contact the underside of This socket and spring the case.
TYPICAL RESULTS Obtaining meaningful results with the AVR-EB4-B requires care, experience, and an understanding of diode transient behavior and the impact of inductive and capacitive parasitics. To assist the user, typical results for commercially available diodes are provided below. The user should be able to reliably duplicate these results.
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1N4937 This transient shows a “soft-switching” recovery, and no reflections are observed at the end of the transient, so the 60 cm coaxial cable was used. If the 5 m cable is used, the measured recovery time will be too high, as shown below: 5 V/div ( = 1 A/div), 20 ns/div.
J5418 RESULTS The Microsemi J5418 was tested with amplitudes set to +100V and -200V, and with the mainframe connected to the test jig using a 60 cm coaxial cable. The following reverse recovery waveform was obtained at the test jig "OUT" terminal: 5 V/div ( = 1 A/div), 20 ns/div.
5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown. S/N 11713. 60 cm cable used. In this case, 73.3 ns was measured for +1A/-2A, versus 73.0 ns for +2A/-4A. 1N4004 RESULTS The generic 1N4004 is a very slow 1A, 400V DO-41 fast-recovery rectifier. With the amplitudes set to +100V and -200V, the following reverse recovery waveform is obtained at the test jig "OUT"...
5 V/div ( = 1 A/div), 200 ns/div. 20%-80% switching time shown. S/N 11713. 60 cm cable used. The above waveform shows the transition from a forward current of +2A to a reverse current of -4A. The reverse transient duration exceeds 1 us under these conditions. MUR8100E RESULTS The On Semiconductor MUR8100E is a 8A, 1000V TO-220 ultrafast rectifier.
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5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown. S/N 11713. 60 cm cable used. The above waveform shows the transition from a forward current of +2A to a reverse current of -4A. The reverse transient lasts for approximately 90 ns under these conditions.
RUS460 RESULTS The EDI RUS460 is a 5A, 600V DO-204AR ultrafast rectifier. With the amplitudes set to +100V and -200V, the following reverse recovery waveform is obtained at the test jig "OUT" terminal: 5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown.
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5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown. S/N 11713. 60 cm cable used. With the 60 cm cable, the measured recovery time is nearly the same as before, but the reflections overlap the transient. In this case, it is best to use the 5m, to clearly separate the two effects (recovery versus reflections).
CSD10120 RESULTS The Cree CSD10120 is a state-of-the-art 1200 Volt, 10 Amp TO-220-packaged Silicon Carbide Schottky diode, promoted as a "Zero Recovery Rectifier". The waveform below shows the results obtained with the CSD10120 diode installed in the AVX-TRR-MIX test jig: 5 V/div ( = 1 A/div), 20 ns/div.
5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown. S/N 11713. 5m cable used. The above waveform shows the transition from a forward current of +0A to a reverse current of -4A, approximately. The reverse transient is nearly unchanged, relative to the case when the forward current was +2A! The CSD10120 datasheet says "this is a majority carrier diode, so there is no reverse recovery charge", and the results above largely support this.
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5 V/div ( = 1 A/div), 20 ns/div. 20%-80% switching time shown. S/N 11713. 5m cable used. The above waveform shows the transition from a forward current of +2A to a reverse current of -4A. The reverse transient lasts for approximately 41 ns under these conditions, and then ends rather abruptly, causing reflections.
SPECIALIZED TEST JIGS AVX-TRR-ANB, AXIAL NO-BEND JIG The AVX-TRR-ANB test jig accepts two types of packages: ● DO-41 (0.205" x 0.107" body, maximum) ● Microsemi Axial Type E (0.185" x 0.135" body, maximum) The DUT is installed in the test jig by dropping it over the area marked “DUT” on the test jig PCB.
The instrument and the DUT will not be damaged if the diode is installed with the incorrect orientation (i.e., with the anode and cathode reversed). However, incorrect waveforms will be generated. When closed, the lid is held is place by a magnetic latch. To open the lid, simply pull upwards on the handle at the front of the lid.
AVX-TRR-HPOST JIG This is similar to the AVX-TRR-AXPOST jig, except that the axial device is secured with screws, rather than spring-loaded jaws: This provides for slightly lower parasitic inductance, at the expense of convenience. AVX-TRR-MELF, MELF JIG The AVX-TRR-MELF accepts MELF (Metal Electrode Leadless Face) type SMT packages.
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The next photo shows a MELF device installed between the two pins: A MELF-packaged Device Under Test (DUT)
AVX-TRR-MELF, CHIP-LEVEL TESTS Certain test jigs, including the AVX-TRR-MELF, accept chip-level packages. These test jigs use spring-loaded flat-headed probe pins to contact the device under test. The connection arrangement is the same as for the standard test jig. An example of this arrangement is shown below: A chip DUT sandwiched between...
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To install the diode, spread apart one pair of spring pins with your fingers or tweezers, and insert one end of the diode. Repeat on the other end. This diode produced the following results (t = 341.9 ns): 5 V/div ( = 1 A/div), 200 ns/div. 20%-80% switching time shown.
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This diode produced the following results (t = 2.595 us): 5 V/div ( = 1 A/div), 200 ns/div. 20%-80% switching time shown. S/N 11713. 60 cm cable used.
AVX-TRR-BTA TEST JIG The AVX-TRR-BTA test jig is designed to accept the unusual package shown below: The AVX-TRR-BTA test jig is shown below: The DUT is installed by pulling back on the chrome knob, as shown below:...
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The DUT is then placed on its side in the area immediately in front of the two fixed probe points, as shown in the photo above. Then slowly release the chrome knob, allowing the spring-loaded PCB to push the DUT into position against the two probe points, as shown below.
The anode pad must contact the left probe point, and the cathode pin must contact the right probe point. With a user-supplied device (part number unknown) installed in the AVX-TRR-BTA, and with the amplitudes set to generate I = +2A and I = -4A, the following results were obtained: 5 V/div ( = 1 A/div), 100 ns/div.
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The device pin sockets and spring pins are shown in greater detail below for the TO-5: Clearance hole for unused TO-5 pin TO-5 Anode TO-5 Cathode Pin Socket Pin Socket Clearance hole for unused TO-5 pin...
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Two pin sockets are provided in the central area to accept the TO-5 package. The unconnected pin passes through one of two clearance hole in the PCB. The Anode and Cathode pin sockets are clearly marked on the PCB. The anode pin socket is on the left, and the cathode is on the right.
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An installed case-cathode device is shown below: For the case-anode configuration, this layout is used: No connection (for physical support of the TO-3 pin) Spring pin connects TO-3 No connection case to Anode (for physical support of the TO-3 case) Pin socket for TO-3 Cathode pin...
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An installed case-anode device is shown below: Only one of the two pins on the TO-3 package is electrically connected in this jig. This allows testing of dual-diode TO-3 packages, by rotating the package to isolate the desired diode. The Microsemi UTG8042 is a dual ultrafast rectifier in a TO-3 package, with the cathodes connected to the case.
5 V/div ( = 1 A/div), 40 ns/div. 20%-80% switching time shown. S/N 12584. 60 cm cable used. The above waveform shows the transition from a forward current of +2A to a reverse current of -4A. The reverse transient lasts for approximately 43 ns under these conditions, and then ends rather abruptly, causing small reflections.
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Then open the tan-colored DUT socket by flipping forward the two black latches on the front edge of it:...
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Insert a diode into one of the 4 “pockets”. The two gold contact pins are visible in each pocket; the device must be aligned with these pins. A DO-41 package is shown installed below: Or, shown in a closer view: The remaining photos shown the different types of SQMELF packages installed:...
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The four pockets are wired in parallel. Only one DUT may be installed at a time, or the resulting waveforms will be incorrect.
Once the DUT is installed in the appropriate pocket, close the tan-colored socket lid and the black main lid. Both must be closed for proper operation. The instrument and the DUT will not be damaged if the diode is installed with the incorrect orientation (i.e., with the anode and cathode reversed).
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The next photo shows a DO214AC device (Vishay US1M) installed in the middle pocket. The anode and cathode sides are clearly marked on the PCB. A DO214AC-packaged Device Under Test (DUT)
TROUBLESHOOTING If you obtain “strange” output waveforms, or unexpected values of t , keep these points in mind: 1) The test jig output must be terminated with 50 Ohms. 2) The coaxial cable connecting the test jig to the output module should normally be as short as possible (60 cm or less).
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.
These commands will satisfy 90% of your programming needs. 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.
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.
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.
WIRING DIAGRAMS WIRING OF AC POWER M a ins circuits - ha z ard ou s live . A3 - BLACK Do not attem pt any repairs on this instrument POWER SWITCH SW325-ND (CW INDUSTRIES G RS-4022-0013) bey ond the fuse replacement procedures described NORMALLY: ECP180PS24 in the m anual.
STANDARD TEST JIG WIRING (AVX-TRR-MIX) K E Y P A D 1 S W 1 D B 9 P I N 1 S W 1 D B 9 P I N 6 R E F L -C D B 9 P I N 2 R E F L -E D B 9 P I N 7 N / C...
TEST JIG WIRING (AVX-TRR-AR1) KE YPA D1 SW 1 SW 1 RE FL-C RE FL-E RE FL-A RE FL-K 1 0 PIN HEA DE R, O N BO TTO M HO A1 3 9 7 REF LECT IV E S ENSO R DU T1 HV A IN GN D...
TEST JIG WIRING (AVX-TRR-SCHA / AVX-TRR-MSB-MELF) K E Y P A D 1 S W 1 S W 1 R E F L - C R E F L - E N / C N / C N / C R E F L - A R E F L - K 1 0 P I N H E A D E R...
TEST JIG WIRING (AVX-TRR-SCHA / AVX-TRR-MSB-STUD) K E Y P A D 1 S W 1 S W 1 R E F L - C R E F L - E N / C N / C N / C R E F L - A R E F L - K 1 0 P I N H E A D E R...
TEST JIG WIRING (AVX-TRR-BTA) X 1 3 X 1 7 4 - 4 0 M O U N T 1 / 2 I N C H P A D W M B E R G S P R 1 0 - 9 S P R I N G X 1 4 X 1 8 4 - 4 0 M O U N T 1 / 2 I N C H P A D...
TEST JIG WIRING (AVX-TRR-ANB) X 2 8 X 3 0 X 2 2 X 2 3 X 2 4 X 2 5 K E Y S T O N E 6 2 1 B R A C K E T K E Y S T O N E 6 2 1 B R A C K E T K E Y S T O N E 6 2 1 B R A C K E T K E Y S T O N E 6 2 1 B R A C K E T...
TEST JIG WIRING (AVX-TRR-LORAX, AVX-TRR-SSDA, AVX-TRR-DO214AC) K E Y P A D 1 S W 1 D B 9 P I N 1 S W 1 D B 9 P I N 6 R E F L - C D B 9 P I N 2 R E F L - E D B 9 P I N 7 N / C...
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