Avtech AVX-FILT Series User manual

INSTRUCTIONS
AVX-FILT SERIES
OF RISE TIME FILTERS
FOR USE WITH
AVR-EBF6-B TFR TEST SYSTEMS
SERIAL NUMBER: ____________
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
P.O. BOX 65
OGDENSBURG, NY
U.S.A. 13669-0 65
TEL: [phone] (USA & Canada) or [phone] (Intl)
FAX: [phone] (USA & Canada) or [phone] (Intl)
[e-mail] - http://www.avtechpulse.com/
X
BOX 51 0, LCD MERIVALE
OTTAWA, ONTARIO
CANADA K C 3H5

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] (Intl)
Fax: [phone] (USA & Canada) or [phone] (Intl)
E-mail: [e-mail]
World Wide Web: http://www.avtechpulse.com

TABLE OF CONTENTS
WARRANTY......................................................................................................................2
TECHNICAL SUPPORT...................................................................................................2
TABLE OF CONTENTS....................................................................................................3
INTRODUCTION...............................................................................................................4
BASIC USAGE..................................................................................................................5
AMPLITUDE ACCURACY.......................................................................................................6
INCORRECT ORIENTATION..................................................................................................6
CABLE LENGTHS..................................................................................................................6
ACCESSIBLE VOLTAGES.....................................................................................................6
PERFORMANCE CHECK SHEET....................................................................................7
Manual Reference: /fileserver /officefiles/instructword/avx-filt/AVX-FILT,ed1.odt.
Last modified November 15, 018.
Copyright © 018 Avtech Electrosystems Ltd, All Rights Reserved.
3

INTRODUCTION
The AVX-FILT models are rise time filters intended for use with the AVR-EBF6-B
forward recovery test system. (The AVX-FILT has not been characterized for use with
other systems.) The AVR-EBF6-B mainframe output provides voltage pulses of up to
+50V with rise times < 5 ns. The rise time filter, when connected to this output,
increases the rise time of the voltage pulse. (One AVX-FILT model is normally included
with each AVR-EBF6-B system. Additional AVX-FILT units may be ordered separately.)
The output rise time (measured 10%-90%, ± 0% accuracy) is:
8 ns for AVX-FILT-8NS units
10 ns for AVX-FILT-10NS units
1 ns for AVX-FILT-1 NS units
0 ns for AVX-FILT- 0NS units
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BASIC USAGE
The AVX-FILT models are rise time filters intended for use with the AVR-EBF6-B
forward recovery test system. Please see the AVR-EBF6-B manual for full details.
The basic test arrangement for the AVR-EBF6-B and AVX-FILT filter is shown in the
figure below:
The AVR-EBF6-B mainframe connects to the rise time filter using a 60 cm length of
SMA-to-SMA coaxial cable.
The output of the filter connects to the test jig using another 60 cm length of SMA-to-
SMA coaxial cable.
5
AVTECH
AVR-EBF6-B
MAINFRAME
SYNC
CONNECTOR
CONTROL
TEST JIG
OSCILLOSCOPE
(BW > 400 MHz
TRIG
0V
VOLTAGE PULSE INPUT (VIN)DIODE VOLTAGE (VDUT)
IN
DUT
OUT
RB,
450Ω
RC,
50Ω
VOUT = VDUT / 10
+50V max.
RS , 50Ω
VDUT
VFM
0V
0.7 V typ.
tFR
RS1, 50Ω
Up to
+100V
+
-
8, 10, 1 , or 0 ns
(10%-90%)
AVX-FILT
rise time filter
60 cm SMA-to-BNC
coaxial cables
(supplied)
60 cm
SMA-to-SMA
coaxial cable
(supplied)
60 cm
SMA-to-SMA
coaxial cable
(supplied)
Coaxial cable
(not supplied)
DB-9 or DB- 5
cable (supplied)
MON
RM,
450Ω
RN,
50Ω

AMPLITUDE ACCURACY
Due to the variations in VF as a function of operating conditions, the amplitude
settings should not be relied upon for any degree of accuracy. Instead the voltage at
the OUT terminal on the test jig should be monitored with a calibrated oscilloscope.
RB can be measured directly on the test jig (with the test jig disconnected) to determine
calibrated relationships, if desired. RC is provided by the user, and can be calibrated as
required.
INCORRECT ORIENTATION
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,
CABLE LENGTHS
The cable lengths are not critical. They may be increased or decreased as desired.
The cables connecting the OUT and MON signals to the oscilloscope should have
identical lengths, to avoid introducing timing skews.
ACCESSIBLE VOLTAGES
The AVR-EBF6-B mainframe provides pulsed voltages of up to 100V to the test jig. For
this reason, the output is automatically disabled when the test jig lid is open. The lid
must be closed to obtain measurements.
Shielded cabling should be used for all connections to the "IN" and "OUT"
terminals on the test jig, and the "OUT" connector on the AVR-EBF6-B mainframe.
When used properly (with RC = 50 Ohms), the maximum voltage on the OUT
terminal will be < 1V, approximately. However, if RC is not connected and the DUT is
not installed, the maximum voltage will at the OUT terminal may be as high as 100V.
You may need to consider whether this scenario would damage your oscilloscope, and
take appropriate precautions.
6

PERFORMANCE CHECK SHEET
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