AVTECH ELECTROSYSTEMS LTD. AVRQ-5-B User manual

INSTRUCTIONS
MODEL AVRQ-5-B
KILOVOLT PULSE GENERATOR
WITH dV/dt RATES
EXCEEDING 100 kV/ s
FOR COMMON MODE TRANSIENT IMMUNITY (CMTI) TESTS
SERIAL NUMBER: 14320
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@avtechp lse.com
http://www.avtechp lse.com/
Tel: [phone] (USA & Canada)
or [phone] (Worldwide)
BOX 5120, LCD MERIVALE
OTTAWA, CANADA K2C3H5

WARRANTY
Avtech Electrosystems Ltd. warrants prod cts of its man fact re to be free
from defects in material and workmanship nder conditions of normal se. If,
within one year after delivery to the original owner, and after prepaid ret rn by
the original owner, this Avtech prod ct is fo nd to be defective, Avtech shall at
its option repair or replace said defective item. This warranty does not apply to
nits which have been dissembled, modified or s bjected to conditions
exceeding the applicable specifications or ratings. This warranty is the extent of
the obligation ass med by Avtech with respect to this prod ct and no other
warranty or g arantee is either expressed or implied.
TECHNICAL SUPPORT
Phone: [phone] (USA & Canada)
or [phone] (Worldwide)
E-mail: info@avtechp lse.com
World Wide Web: http://www.avtechp lse.com
2

TABLE OF CONTENTS
WARRANTY....................................................................................................................2
TECHNICAL SUPPORT..................................................................................................2
TABLE OF CONTENTS..................................................................................................3
INTRODUCTION............................................................................................................. 6
HIGH-VOLTAGE PRECAUTIONS..................................................................................8
SPECIFICATIONS...........................................................................................................9
REGULATORY NOTES................................................................................................10
FCC PART 18........................................................................................................................ 10
EC DECLARATION OF CONFORMITY................................................................................10
DIRECTIVE 2011/65/EU (RoHS)...........................................................................................11
DIRECTIVE 2002/96/EC ( EEE)..........................................................................................11
FIRM ARE LICENSING....................................................................................................... 12
INSTALLATION.............................................................................................................13
VISUAL CHECK.................................................................................................................... 13
PO ER RATINGS................................................................................................................13
CONNECTION TO THE PO ER SUPPLY...........................................................................13
PROTECTION FROM ELECTRIC SHOCK...........................................................................14
ENVIRONMENTAL CONDITIONS........................................................................................15
FUSES...........................................................................................................................16
AC FUSE REPLACEMENT...................................................................................................16
DC FUSE REPLACEMENT...................................................................................................17
FUSE RATINGS.................................................................................................................... 17
CHASSIS CONFIGURATIONS.....................................................................................18
STANDARD CONFIGURATION............................................................................................18
-FPD CONFIGURATION.......................................................................................................18
FRONT PANEL CONTROLS (UNITS WITHOUT -FPD OPTION ................................19
REAR PANEL CONTROLS (UNITS WITHOUT -FPD OPTION ...................................21
FRONT PANEL CONTROLS (UNITS WITH -FPD OPTION ........................................24
REAR PANEL CONTROLS (UNITS WITH -FPD OPTION ..........................................28
GENERAL INFORMATION...........................................................................................30
BASIC PULSE CONTROL....................................................................................................30
TRIGGER MODES................................................................................................................31
GATING MODES...................................................................................................................32
3

DUT INSTALLATION....................................................................................................33
SOCKET PINOUT.................................................................................................................33
DAUGHTERBOARD PINOUT...............................................................................................34
DAUGHTERBOARD COMPONENTS...................................................................................36
SO-8 DAUGHTERBOARD (PCB 314B)................................................................................38
CUSTOMER-SPECIFIC PCB 324B DAUGHTERBOARD.....................................................39
CUSTOM DAUGHTERBOARDS...........................................................................................40
DIFFERENTIAL PROBING...................................................................................................40
INSTALLING THE DAUGHTERBOARDS.............................................................................41
BASIC TEST ARRANGEMENTS..................................................................................42
INTER-CHANNEL INTERFERENCE.....................................................................................44
TYPICAL WAVEFORMS FOR STANDARD DAUGHTERBOARDS............................45
BASIC THEORY.................................................................................................................... 45
CONTROLLING THE TRANSITION TIME............................................................................46
TYPICAL POSITIVE RESULTS, ITH NO DUT INSTALLED..............................................47
TYPICAL NEGATIVE RESULTS, ITH NO DUT INSTALLED............................................48
TYPICAL POSITIVE RESULTS (-XHV UNITS).....................................................................49
TYPICAL NEGATIVE RESULTS (-XHV UNITS)...................................................................50
VO3120 RESULTS................................................................................................................51
HCPL-7721 RESULTS..........................................................................................................54
INDUCTIVE SPIKES AND PROBE SATURATION......................................................57
DC CORRECTNESS ISSUES.......................................................................................59
VERIFICATION AND TROUBLESHOOTING...............................................................60
SAFETY CONCERNS...................................................................................................62
TURN OUTPUT OFF BEFORE ACCESSING DUT...............................................................62
AUTOMATIC TIMEOUT........................................................................................................62
OVERLOAD INDICATOR......................................................................................................62
OPERATIONAL CHECK...............................................................................................63
PROTECTING YOUR INSTRUMENT............................................................................65
USE HIGH-VOLTAGE CABLES, CONNECTORS, AND PROBES.......................................65
SHORT-CIRCUIT PROTECTION..........................................................................................65
MECHANICAL INFORMATION.....................................................................................66
TOP COVER REMOVAL.......................................................................................................66
RACK MOUNTING................................................................................................................66
MAINTENANCE............................................................................................................ 67
4

REGULAR MAINTENANCE..................................................................................................67
CLEANING............................................................................................................................ 67
TRIGGER DAMAGE..............................................................................................................67
PROGRAMMING YOUR PULSE GENERATOR...........................................................68
KEY PROGRAMMING COMMANDS....................................................................................68
ALL PROGRAMMING COMMANDS.....................................................................................69
WIRING DIAGRAMS.....................................................................................................71
IRING OF AC PO ER.......................................................................................................71
MEDIUM VOLTAGE PO ER SUPPLY................................................................................72
PCB 158R7 - LO VOLTAGE PO ER SUPPLY................................................................73
PCB 104H - KEYPAD / DISPLAY BOARD...........................................................................74
PCB 228C - OP AMPS (-AHV AND -XHV UNITS)................................................................75
DUT IRING, ON MAIN PCB...............................................................................................76
DUT IRING, ON STANDARD DAUGHTERBOARD (PCB 267D)......................................77
DUT IRING, ON SO8 DAUGHTERBOARD (PCB 314B)...................................................78
DUT IRING, ON CUSTOMER-SPECIFIC DAUGHTERBOARD (PCB 324B)....................79
MAIN IRING....................................................................................................................... 80
PERFORMANCE CHECK SHEET................................................................................81
Man al Reference: /fileserver1/officefiles/instr ctword/avrq-5/AVRQ-5-B,ed21.odt.
Last modified March 1, 2023.
Copyright © 2023 Avtech Electrosystems Ltd, All Rights Reserved.
5

INTRODUCTION
The AVRQ-5-B is designed to test the common mode transient imm nity (CMTI) of
optoco plers.
The standard AVRQ-5-B can generate -1.5 or +1.5 kV p lses. The nloaded switching
time (10%-90%) is fixed at ≤ 10 ns. The transition time may be increased to at least 50
ns by adding high-voltage capacitors across the device nder test (by soldering it to the
DUT da ghterboard). This corresponds to transition rates of < 24 to > 120 kV/ s.
The -AHV option provides greater flexibility in the amplit de setting, permitting
adj stment from 1.0 to 1.5 kV (+ or -) in ≤ 1V steps.
The -XHV option provides a different amplit de range of 1.5 to 2.0 kV (+ or -) in ≤ 1V
steps, b t the minim m switching time increases to 15 ns.
A da ghterboard arrangement is sed to accommodate difference device packages
and bias conditions. An arrangement of pin sockets on the main motherboard accepts
these da ghterboards. Eight da ghterboards s itable for se with typical 5V DIP8
packages are incl ded with the AVRQ-5-B. The CAD/CAM files for these sample
boards are available for download at:
https://www.avtechp lse.com/semicond ctor/avrq-5/#s pport_files
Users may design their own da ghterboards to accommodate other package styles.
(Earlier AVRQ-5-B nits, prior to S/N 13700, sed a different socketing and
da ghterboard arrangement. C rrent nits have a different arrangement that offers
lower parasitic ind ctance.)
The AVRQ-5-B mainframe provides the high-voltage common mode p lse (which is tied
to GND1), and VCC2 / GND2 (the non-floating o tp t-side power s pply). The ser is
responsible for config ring the da ghterboards to implement the correct inp t side
power (VCC1), biasing, filtering, loading, socketing, and glitch meas rement. The
incl ded sample boards implement these req irements for common DIP8 devices,
sing config rable j mpers/resistors/capacitors. A probe point is provided on the
motherboard for observation of the device logic o tp t with a ser-provided probe and
oscilloscope. An optional probe point is also provided on the sample da ghterboards.
The gro nd-referenced o tp t-side power (VCC2) is generated by the mainframe, and
is adj stable (+3V to +43V, 150 mA maxim m). The floating inp t-side power is not
provided by the mainframe. Instead, an A23-type 12V battery sho ld be installed on the
DUT da ghterboard to provide a floating power so rce, along with a basic reg lator
circ it to provide the necessary reg lated +5V power (VCC1). A isolated battery
arrangement is sed to ens re that the VCC1 power s pply is not the so rce of any
glitches observed in the operation of the DUT.
6

The high-voltage p lse and the logic o tp t of the DUT m st be meas red by the ser,
sing s itable high-impedance oscilloscope probes. Coaxial cabling sho ld not be
sed, beca se it will introd ce too m ch parasitic capacitance.
The AVRQ-5-B feat res front panel keyboard and adj st knob control of the o tp t
p lse parameters along with a fo r line by 40-character backlit LCD display of the rise
time, p lse width, p lse delay, and p lse repetition freq ency. The instr ment incl des
memory to store p to fo r complete instr ment set ps. The operator may se the front
panel or the comp ter interface to store a complete “snapshot” of all key instr ment
settings, and recall this set p at a later time.
This instr ment is intended for se in research, development, test and calibration
laboratories by q alified personnel.
7

HIGH-VOLTAGE PRECAUTIONS
CAUTION: This instr ment provides o tp t voltages as high as 1500 or 2000 Volts
nder normal operating conditions, so extreme ca tion m st be employed when sing
this instr ment. The instr ment sho ld only be sed by individ als who are thoro ghly
skilled in high voltage laboratory techniq es. The following preca tions sho ld always
be observed:
1. Keep exposed high-voltage wiring to an absol te minim m.
2. Wherever possible, se shielded connectors and cabling.
3. Connect and disconnect loads and cables only when the instr ment is t rned off.
4. Keep in mind that all cables, connectors, oscilloscope probes, and loads m st
have an appropriate voltage rating.
Do not attempt any repairs on the instr ment, beyond the f se replacement proced res
described in this man al. Contact Avtech technical s pport (see page 2 for contact
information) if the instr ment req ires servicing.
8

SPECIFICATIONS
Model: AVRQ-5-B1
High-Voltage P lse Amplit de:
(HV p lse / GND1)
Standard: -1.5 or +1.5 kV
with -AHV5 option: -1 kV to -1.5 kV, +1 kV to +1.5 kV, in ≤ 1V steps
with -XHV6 option: -1.5 kV to -2 kV, -1.5 kV to -2 kV, in ≤ 1V steps
Load resistance: > 10 Megohms (this is not a 50 Ohm system.)
Load capacitance (CLOAD): Standard: 0 to ~300 pF.
-XHV nits: 0 to ~1000 pF.
M st be adj sted to obtain the desired transition time.
Load connection style: A pattern of pin sockets into which a da ghterboard may be pl gged is provided.
Sample da ghterboards with 8-pin DIP sockets are incl ded.
The ser may also ser their own c stom-made da ghterboards.
Leading edge rise time for maxim m
o tp t voltage2,8 (10% - 90%):
Standard: ≤ 10 ns (for CLOAD = 0 pF), p to 50 ns.
-XHV nits: ≤ 15 ns (for CLOAD = 0 pF), p to 50 ns.
Adj sted by varying CLOAD.
Leading edge shape: Approximately linear. See the typical waveform photos on the preceding and following pages.
Trailing edge fall time (90%-10%): At least ten times greater than the leading edge rise time. Not adj stable.
Trailing edge shape: Exponential decay, approximately. See the typical waveform photos on the preceding and following pages.
P lse width (meas red between the
start of the leading edge
and the start of the falling edge):
1 - 20 s, adj stable.
PRF: Standard: 10 Hz maxim m
-HF option: 100 Hz maxim m
VCC1 power s pply (inp t side,
floating, referenced to HV p lse /
GND1):
Not provided by the mainframe.
The inp t side of the da ghterboards m st be self-powered.
The incl ded sample boards se an A23-type battery with a low-dropo t reg lator.
VCC2 power s pply7 (o tp t side,
referenced to GND2 chassis gro nd):
+3V to +43V, adj stable
150 mA maxim m
Logic o tp t p ll- p resistance: User-installed, on da ghterboard as appropriate
O tp t connector, HV PULSE: BNC female, s itable for se with the Tektronix P5100 high-voltage probe
and 013-0291-00 probe-tip-to-BNC adapter. Other probes may be s itable.
Not intended to drive any length of coaxial cabling directly.
O tp t connector, logic o tp t: A two-pin header s itable for se with the Tektronix P6246 differential probe4.
Other probes may be sed by installing a matching two-pin socket as an extender.
O tp t enable timer: The o tp t will only remain active for 90 seconds after the last o tp t parameter pdate.
After that time, the o tp t will be disabled. The o tp t m st be re-enabled
from the front panel or by comp ter command for the next test seq ence.
Propagation delay: ≤ 200 ns (Ext trig in to start of o tp t p lse)
Jitter (Ext trig in to p lse o t): ± 200 ps ± 0.03% of sync delay
Trigger modes: Internal trigger, external trigger (TTL level p lse, > 10 ns, 1 kΩ inp t impedance),
front-panel “Single P lse” p shb tton, or single p lse trigger via comp ter command.
Variable delay: Sync to O t: 0 to ±1.0 seconds, for all trigger modes (incl ding external trigger).
Sync o tp t: +3 Volts, 100 ns, will drive 50 Ohm loads
Gate inp t: Synchrono s, active high or low, switchable. S ppresses triggering when active.
Other connectors: Trig, Sync, Gate: BNC
GPIB and RS-232 control: Yes. (Visit http://www.avtechp lse.com/labview for LabView drivers.)
Ethernet port, for remote control
sing VXI-11.3, ssh, telnet, & web:
Incl ded. Recommended as a modern alternative to GPIB / RS-232.
See http://www.avtechp lse.com/options/vxi for details.
Settings acc racy: Not calibrated. Verify the o tp t parameters with a calibrated oscilloscope.
Power req irements: 100 - 240 Volts, 50 - 60 Hz
Dimensions: (H x W x D) 145 x 430 x 475 mm (5.7” x 17” x 18.8”)
Chassis material: cast al min m frame and handles, bl e vinyl on al min m cover plates
Temperat re range: +5°C to +40°C
1) -B s ffix indicates IEEE-488.2 GPIB and RS-232 control of amplit de, p lse width, PRF and delay (See http://www.avtechp lse.com/gpib/).
2) The rise time is affected by the load capacitance. A high-voltage high-bandwidth oscilloscope probe s ch as the Tektronix P5100 sho ld always be sed to verify the
act al o tp t rise time, rather than relying on the programmed val e.
3) To specify the extended VCC2 range, add the -SCHB option s ffix to the model n mber.
4) A differential probe is s ggested to red ce the possibility of interference from the high-voltage p lse. Note that the P6246 is only s itable for val es of VCC2 p to +7V. A
non-differential probe may be more s itable if VCC2 > 7V, or if parasitic ind ctances or capacitances in the test circ it ca se differential voltage spikes exceeding ±7V.
The P6246 can sat rate nder those conditions, which can generate apparent glitch-like transients that are not d e to the DUT. Some experimentation may be req ired
by the ser in order to identify the best probing arrangement.
5) Add the s ffix -AHV to the model n mber to specify the +/- 1 to 1.5 kV (in ≤ 1V steps) operating range.
6) Add the s ffix -XHV to the model n mber to specify the +/- 1.5 to 2 kV (in ≤ 1V steps) operating range. This optiion increases the minim m switching time by 5 ns.
7) VCC2 is normally provided at the DUT socket. It can also be provided on a BNC connector for monitoring p rposes by specifying the -V2 option. The BNC connnector will
be on the same panel as the DUT enclos re (rear panel for standard nits, front panel for -FPD nits.) The shield of this BNC connector is connected to GND2 / chassis
gro nd.
8) Valid with a Tektronix P5100 high-voltage probe connected directly to the HV PULSE connector. Connecting anything else (e.g., additional coaxial cabling or external
DUTs) may degrade the switching times significantly.
9

REGULATORY NOTES
FCC PART 18
This device complies with part 18 of the FCC r les for non-cons mer ind strial,
scientific and medical (ISM) eq ipment.
This instr ment is enclosed in a r gged metal chassis and ses a filtered power entry
mod le (where applicable). The main o tp t signal is provided on a shielded connector
that is intended to be sed with shielded coaxial cabling and a shielded load. Under
these conditions, the interference potential of this instr ment is low.
If interference is observed, check that appropriate well-shielded cabling is sed on the
o tp t connectors. Contact Avtech (info@avtechp lse.com) for advice if yo are ns re
of the most appropriate cabling. Also, check that yo r load is adeq ately shielded. It
may be necessary to enclose the load in a metal enclos re.
If any of the connectors on the instr ment are n sed, they sho ld be covered with
shielded metal “d st caps” to red ce the interference potential.
This instr ment does not normally req ire reg lar maintenance to minimize interference
potential. However, if loose hardware or connectors are noted, they sho ld be
tightened. Contact Avtech (info@avtechp lse.com) if yo req ire assistance.
EC DECLARATION OF CONFORMITY
We Avtech Electrosystems Ltd.
P.O. Box 5120, LCD Merivale
Ottawa, Ontario
Canada K2C 3H5
declare that this p lse generator meets the intent of Directive 2004/108/EG for
Electromagnetic Compatibility. Compliance pertains to the following specifications as
listed in the official Jo rnal of the E ropean Comm nities:
EN 50081-1 Emission
EN 50082-1 Imm nity
10

and that this p lse generator meets the intent of the Low Voltage Directive 2006/95/EC.
Compliance pertains to the following specifications as listed in the official Jo rnal of the
E ropean Comm nities:
EN 61010-1:2001 Safety req irements for electrical eq ipment for
meas rement, control, and laboratory se
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 o r knowledge, all electrical and electronic eq ipment (EEE)
sold by the company are in compliance with Directive 2011/65/EU of the E ropean
Parliament and of the Co ncil of 8 J ne 2011 on the restriction of the se of certain
hazardo s s bstances in electrical and electronic eq ipment (also known as “RoHS
Recast”). In addition, this declaration of conformity is iss ed nder the sole
responsibility of Avtech Electrosystems Ltd. Specifically, prod cts man fact red do not
contain the s bstances listed in the table below in concentrations greater than the listed
maxim m val e.
Material/Substance Threshold level
Lead (Pb) < 1000 ppm (0.1% by mass)
Merc ry (Hg) < 1000 ppm (0.1% by mass)
Hexavalent Chromi m (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)
Cadmi m (Cd) < 100 ppm (0.01% by mass)
Bis(2-ethylhexyl) phthalate (DEHP) < 1000 ppm (0.1% by mass)
B tyl benzyl phthalate (BBP) < 1000 ppm (0.1% by mass)
Dib tyl phthalate (DBP) < 1000 ppm (0.1% by mass)
Diisob tyl phthalate (DIBP) < 1000 ppm (0.1% by mass)
DIRECTIVE 2002/96/EC (WEEE)
E ropean c stomers who have p rchased this eq ipment 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 E ropean Union and local
11

laws) on behalf of the c stomer, as provided for nder Article 9 of Directive
2002/96/EC.
C stomers who have p rchased Avtech eq ipment thro gh local representatives
sho ld cons lt with the representative to determine who has responsibility for WEEE
compliance. Normally, s ch responsibilities with lie with the representative, nless other
arrangements ( nder Article 9) have been made.
Req irements for WEEE compliance may incl de registration of prod cts with local
governments, reporting of recycling activities to local governments, and financing of
recycling activities.
FIRMWARE LICENSING
Instr ments with firmware versions 5.00 or higher se open-so rce software internally.
Some of this software req ires that the so rce code be made available to the ser as a
condition of its licensing. This so rce code is available pon req est (contact
info@avtechp lse.com).
Earlier firmware versions do not contain any open so rce software.
12

INSTALLATION
VISUAL CHECK
After npacking the instr ment, examine to ens re that it has not been damaged in
shipment. Vis ally inspect all connectors, knobs, liq id crystal displays (LCDs), and the
handles. Confirm that a power cord, a GPIB cable, and two instr mentation man als
(this man al and the “Programming Man al for -B Instr ments”) are with the instr ment.
If the instr ment has been damaged, file a claim immediately with the company that
transported the instr ment.
The following additional items sho ld be with the instr ment:
1. Eight assembled PCB 267D da ghterboards
2. Eight A23-type 12V batteries
Additional items may be incl ded, depending on the options ordered.
POWER RATINGS
This instr ment is intended to operate from 100 - 240 V, 50 - 60 Hz.
The maxim m power cons mption is 57 Watts. Please see the “FUSES” section for
information abo t the appropriate AC and DC f ses.
This instr ment is an “Installation Category II” instr ment, intended for operation from a
normal single-phase s pply.
CONNECTION TO THE POWER SUPPLY
An IEC-320 three-pronged recessed male socket is provided on the back panel for AC
power connection to the instr ment. One end of the detachable power cord that is
s pplied with the instr ment pl gs into this socket. The other end of the detachable
power cord pl gs into the local mains s pply. Use only the cable s pplied with the
instr ment. The mains s pply m st be earthed, and the cord sed to connect the
instr ment to the mains s pply m st provide an earth connection. (The s pplied cord
does this.)
Warning: Fail re to se a gro nded o tlet may res lt in inj ry or death d e to
electric shock. This prod ct ses a power cord with a gro nd connection. It m st be
connected to a properly gro nded o tlet. The instr ment chassis is connected to the
gro nd wire in the power cord.
The table below describes the power cord that is normally s pplied with this instr ment,
depending on the destination region:
13

Destination Region Description Option Man fact rer Part N mber
United Kingdom, Hong Kong,
Singapore, Malaysia
BS 1363,
230V, 50 Hz -AC00 Q altek 370001-E01
A stralia, New Zealand AS 3112:2000,
230-240V, 50 Hz -AC01 Q altek 374003-A01
Continental E rope, Korea,
Indonesia, R ssia
E ropean CEE 7/7
“Sch ko” 230V, 50 Hz -AC02 Q altek 364002-D01
North America, Taiwan NEMA 5-15,
120V, 60 Hz -AC03 Q altek 312007-01
Switzerland SEV 1011,
230V, 50 Hz -AC06 Q altek 378001-E01
So th Africa, India SABS 164-1,
220-250V, 50 Hz -AC17 Volex 2131H 10 C3
Japan JIS 8303,
100V, 50-60 Hz -AC18 Q altek 397002-01
Israel SI 32,
220V, 50 Hz -AC19 Q altek 398001-01
China GB 1002-1 / 2099-1,
220V, 50 Hz -AC22 Q altek 399012-01
PROTECTION FROM ELECTRIC SHOCK
Operators of this instr ment m st be protected from electric shock at all times. The
owner m st ens re that operators are prevented access and/or are ins lated from
every connection point. In some cases, connections m st be exposed to potential
h man contact. Operators m st be trained to protect themselves from the risk of electric
shock. This instr ment is intended for se by q alified personnel who recognize shock
hazards and are familiar with safety preca tions req ired to avoid possibly inj ry. In
partic lar, operators sho ld:
1. Keep exposed high-voltage wiring to an absol te minim m.
2. Wherever possible, se shielded connectors and cabling.
3. Connect and disconnect loads and cables only when the instr ment is t rned off.
4. Keep in mind that all cables, connectors, oscilloscope probes, and loads m st
have an appropriate voltage rating.
5. Do not attempt any repairs on the instr ment, beyond the f se replacement
proced res described in this man al. Contact Avtech technical s pport (see
page 2 for contact information) if the instr ment req ires servicing. Service is to
be performed solely by q alified service personnel.
14

ENVIRONMENTAL CONDITIONS
This instr ment is intended for se nder the following conditions:
1. indoor se;
2. altit de p to 2 000 m;
3. temperat re 5 °C to 40 °C;
4. maxim m relative h midity 80 % for temperat res p to 31 °C decreasing
linearly to 50 % relative h midity at 40 °C;
5. Mains s pply voltage fl ct ations p to ±10 % of the nominal voltage;
6. no poll tion or only dry, non-cond ctive poll tion.
15

FUSES
This instr ment contains fo r f ses. All are accessible from the rear-panel. Two protect
the AC prime power inp t, and two protect the internal DC power s pplies. The
locations of the f ses on the rear panel are shown in the fig re below:
AC FUSE REPLACEMENT
To physically access the AC f ses, the power cord m st be detached from the rear
panel of the instr ment. The f se drawer may then be extracted sing a small flat-head
screwdriver, as shown below:
16
Fuse
Drawer
Pry out the fuse
drawer using a
screwdriver.
Fuses #1 and #2
AC fuses)
Fuse #4
DC fuse)
Fuse #3
DC fuse)

DC FUSE REPLACEMENT
The DC f ses may be replaced by inserting the tip of a flat-head screwdriver into the
f se holder slot, and rotating the slot co nter-clockwise. The f se and its carrier will
then pop o t.
FUSE RATINGS
The following table lists the req ired f ses:
F ses
Nominal
Mains
Voltage
Rating Case Size
Recommended Replacement Part
Littelf se Part
N mber
Digi-Key Stock
N mber
#1, #2 (AC) 100-240V 0.5A, 250V,
Time-Delay 5×20 mm 0218.500HXP F2416-ND
#3 (DC) N/A 1.0A, 250V,
Time-Delay 5×20 mm 0218001.HXP F2419-ND
#4 (DC) N/A 0.5A, 250V,
Time-Delay 5×20 mm 0218.500HXP F2416-ND
The recommended f se man fact rer is Littelf se (http://www.littelf se.com).
Replacement f ses may be easily obtained from Digi-Key (http://www.digikey.com) and
other distrib tors.
17

CHASSIS CONFIGURATIONS
The AVRQ-5-B is offered with two basic chassis config rations. The standard model is
provided in a “3U” height (in rack nits) enclos re, with the DUT area located on the
rear panel.
The DUT area may optionally be moved to the front panel by specifying the -FPD
option. This is more convenient for the ser, b t it increases the height of the
instr ment from 3U to 5U, and higher shipping costs may apply.
STANDARD CONFIGURATION
Front Rear
-FPD CONFIGURATION
Front Rear
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FRONT PANEL CONTROLS (UNITS WITHOUT -FPD OPTION)
1. POWER Switch . This is the main power switch. When t rning the instr ment on,
there is normally a delay of 10 seconds before anything is shown on the main display,
as the internal operating system boots p.
2. OVERLOAD Indicator . When the instr ment is powered, this indicator is normally
green, indicating normal operation. If this indicator is yellow, an internal a tomatic
overload protection circ it has been tripped. If the nit is overloaded (by operating at an
exceedingly high d ty cycle or by operating into a very low impedance), the protective
circ it will disable the o tp t of the instr ment and t rn the indicator light yellow. The
light will stay yellow (i.e. o tp t disabled) for abo t 5 seconds after which the instr ment
will attempt to re-enable the o tp t (i.e. light green) for abo t 1 second. If the overload
condition persists, the o tp t will be disabled again (i.e. light yellow) for another 5
seconds. If the overload condition has been removed, the instr ment will res me
normal operation.
This overload indicator may flash yellow briefly at start- p. This is not a ca se for
concern.
3. SYNC OUT . This connector s pplies a SYNC o tp t that can be sed to trigger
other eq ipment, partic larly oscilloscopes. This signal leads (or lags) the main o tp t
by a d ration set by the "DELAY" controls and has an approximate amplit de of +3
Volts to RL > 1 kΩ with a p lse width of approximately 100 ns.
4. LIQUID CRYSTAL DISPLAY (LCD) . This LCD is sed in conj nction with the
keypad to change the instr ment settings. Normally, the main men is displayed, which
lists the key adj stable parameters and their c rrent val es. The “Programming Man al
for -B Instr ments” describes the men s and s bmen s in detail.
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5. KEYPAD .
Control Name F nction
MOVE This moves the arrow pointer on the display.
CHANGE This is sed to enter the s bmen , or to select the operating
mode, pointed to by the arrow pointer.
×10 If one of the adj stable n meric parameters is displayed, this
increases the setting by a factor of ten.
÷10 If one of the adj stable n meric parameters is displayed, this
decreases the setting by a factor of ten.
+/- If one of the adj stable n meric parameters is displayed, and
this parameter can be both positive or negative, this changes the
sign of the parameter.
EXTRA FINE This changes the step size of the ADJUST knob. In the extra-
fine mode, the step size is twenty times finer than in the normal
mode. This b tton switches between the two step sizes.
ADJUST This large knob adj sts the val e of any displayed n meric
adj stable val es, s ch as freq ency, p lse width, etc. The
adj st step size is set by the "EXTRA FINE" b tton.
When the main men is displayed, this knob can be sed to
move the arrow pointer.
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