AVTECH ELECTROSYSTEMS LTD. AV-110G-PS User manual

INSTRUCTIONS
MODEL AV-110G-PS
0 to ±200V, 350 kHz
VARIABLE-GAIN
LINEAR AMPLI IER
SERIAL NUMBER: 14352
1
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 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 O CONTENTS
WARRANTY.................................................................................................................... 2
TECHNICAL SUPPORT..................................................................................................2
TABLE OF CONTENTS..................................................................................................3
INTRODUCTION............................................................................................................. 5
HIGH-VOLTAGE PRECAUTIONS..................................................................................5
SPECIFICATIONS...........................................................................................................6
REGULATORY NOTES.................................................................................................. 7
FCC PART 18.......................................................................................................................... 7
EC DECLARATION OF CONFORMITY..................................................................................7
DIRECTIVE 2011/65/EU (RoHS).............................................................................................8
DIRECTIVE 2002/ 6/EC (WEEE)............................................................................................8
INSTALLATION............................................................................................................. 10
VISUAL CHECK.................................................................................................................... 10
POWER RATINGS................................................................................................................10
CONNECTION TO THE POWER SUPPLY...........................................................................10
PROTECTION FROM ELECTRIC SHOCK...........................................................................11
ENVIRONMENTAL CONDITIONS........................................................................................12
FUSES........................................................................................................................... 13
AC FUSE REPLACEMENT...................................................................................................13
DC FUSE REPLACEMENT...................................................................................................14
FUSE RATINGS.................................................................................................................... 14
FRONT PANEL CONTROLS........................................................................................15
REAR PANEL CONTROLS...........................................................................................17
GENERAL INFORMATION...........................................................................................1
BASIC CONTROL.................................................................................................................18
CABLE LENGTHS................................................................................................................18
OPERATIONAL CHECK...............................................................................................19
MECHANICAL INFORMATION.....................................................................................21
TOP COVER REMOVAL.......................................................................................................21
RACK MOUNTING................................................................................................................21
ELECTROMAGNETIC INTERFERENCE..............................................................................21
MAINTENANCE............................................................................................................ 22
REGULAR MAINTENANCE..................................................................................................22
CLEANING............................................................................................................................22
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WIRING DIAGRAMS.....................................................................................................23
WIRING OF AC POWER.......................................................................................................23
PCB 158R7 - LOW VOLTAGE POWER SUPPLY................................................................24
PCB 282C - HIGH VOLTAGE DC POWER SUPPLY............................................................25
MAIN WIRING....................................................................................................................... 26
PERFORMANCE CHECK SHEET................................................................................27
Manual Reference: /fileserver1/officefiles/instructword/av-110/AV-110G-PS,ed5.odt.
Last modified June 12, 2023.
Copyright © 2023 Avtech Electrosystems Ltd, All Rights Reserved.
4

INTRODUCTION
The Model AV-110G-PS variable-gain linear amplifier accepts input voltages in the
range of 0 to ±2V, and has a variable gain of +1 to +100. The maximum output voltage
is ±200V. The AV-110G-PS will drive load impedances of 50 kΩ or higher. The amplifier
bandwidth is 350 kHz.
This instrument is intended for use in research, development, test and calibration
laboratories by qualified personnel.
HIGH-VOLTAGE PRECAUTIONS
CAUTION: This instrument provides output voltages as high as ±200 Volts, so
extreme caution must be employed when using this instrument. The instrument should
only be used by individuals who are thoroughly skilled in high voltage laboratory
techniques. The following precaution should always be observed:
1) Keep exposed high-voltage wiring to an absolute minimum.
2) Wherever possible, use shielded connectors and cabling.
3) Connect and disconnect loads and cables only when the amplifier is turned off.
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 2 for contact information) if the instrument requires servicing.
5

SPECI ICATIONS
Model: AV-110G-PS
Output amplitude: 0 to ±200 V
Maximum current: 4 mA
Load impedance: ≥ 50 kΩ
Output resistance1: ≈ 0Ω
Bandwidth (f-3dB): 350 kHz
Rise time (20%-80%,
for maximum output): 1.5 us
Output power maximum): 0.8 W
Voltage gain2: ×1 to ×100
Gain polarity: Standard: Non-inverting (+)
Optional5: Switchable between Non-inverting (+) and Inverting (-) modes
Input range2: 0 to ± 2 Volts (1 kΩ input impedance)
Dual channel: Optional3
Regular DC offset
option2,4,7:± 50 V
Extended DC offset
option2,6,7:± 200 V
Connectors: In, Out: BNC
Dimensions: 100 mm x 430 mm x 375 mm (3.9” x 17” x 14.8”)
Power requirement: 100-240 Volts, 50-60 Hz
1) “Output resistance” is the internal resistance in series with output. Non-zero output impedances (ROUT) will reduce the
maximum output amplitude slightly when operating into low load impedances. That is, VOUT = VSET × RLOAD / (RLOAD +
ROUT), where VSET is the set amplitude and RLOAD is the load resistance.
2) These parameters can easily be adapted to meet special requirements. Contact Avtech ([e-mail]) with your
special application!
3) To specify the two channel option add the suffix -D to the model number.
4) To specify the regular DC offset option, add the suffix -OS to the model number.
5) Add the suffix -INV to specify the switchable gain polarity feature.
6) To specify the extended DC offset option, add the suffix -XOS to the model number.
7) The sum of the amplitude and the offset must remain within the rated output amplitude range – i.e., this option does not change
the minimum or maximum obtainable output voltage.
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REGULATORY NOTES
CC PART 18
This device complies with part 18 of the CC 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 O CON ORMITY
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
laws) on behalf of the customer, as provided for under Article 9 of Directive
2002/96/EC.
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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.
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INSTALLATION
VISUAL CHECK
After unpacking the instrument, examine to ensure that it has not been damaged in
shipment. Visually inspect all connectors, knobs, and handles. Confirm that a power
cord is with the instrument. If the instrument has been damaged, file a claim
immediately with the company that transported the instrument.
POWER RATINGS
This instrument is intended to operate from 100 - 240 V, 50 - 60 Hz.
The maximum power consumption is 57 Watts. Please see the “ USES” section for
information about the appropriate AC and DC fuses.
This instrument is an “Installation Category II” instrument, intended for operation from a
normal single-phase supply.
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 instrument. One end of the detachable power cord that is
supplied with the instrument plugs into this socket. The other end of the detachable
power cord plugs into the local mains supply. Use only the cable supplied with the
instrument. The mains supply must be earthed, and the cord used to connect the
instrument to the mains supply must provide an earth connection. (The supplied cord
does this.)
Warning: ailure to use a grounded outlet may result in injury or death due to
electric shock. This product uses a power cord with a ground connection. It must be
connected to a properly grounded outlet. The instrument chassis is connected to the
ground wire in the power cord.
The table below describes the power cord that is normally supplied with this instrument,
depending on the destination region:
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Destination Region Description Option Manufacturer Part Number
United Kingdom, Hong Kong,
Singapore, Malaysia
BS 1363,
230V, 50 Hz -AC00 Qualtek 370001-E01
Australia, New Zealand AS 3112:2000,
230-240V, 50 Hz -AC01 Qualtek 374003-A01
Continental Europe, Korea,
Indonesia, Russia
European CEE 7/7
“Schuko” 230V, 50 Hz -AC02 Qualtek 364002-D01
North America, Taiwan NEMA 5-15,
120V, 60 Hz -AC03 Qualtek 312007-01
Switzerland SEV 1011,
230V, 50 Hz -AC06 Qualtek 378001-E01
South Africa, India SABS 164-1,
220-250V, 50 Hz -AC17 Volex 2131H 10 C3
Japan JIS 8303,
100V, 50-60 Hz -AC18 Qualtek 397002-01
Israel SI 32,
220V, 50 Hz -AC19 Qualtek 398001-01
China GB 1002-1 / 2099-1,
220V, 50 Hz -AC22 Qualtek 399012-01
PROTECTION ROM ELECTRIC SHOCK
Operators of this instrument must be protected from electric shock at all times. The
owner must ensure that operators are prevented access and/or are insulated from
every connection point. In some cases, connections must be exposed to potential
human contact. Operators must be trained to protect themselves from the risk of electric
shock. This instrument is intended for use by qualified personnel who recognize shock
hazards and are familiar with safety precautions required to avoid possibly injury. In
particular, operators should:
1. Keep exposed high-voltage wiring to an absolute minimum.
2. Wherever possible, use shielded connectors and cabling.
3. Connect and disconnect loads and cables only when the instrument is turned off.
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 2 for contact information) if the instrument requires servicing. Service is to
be performed solely by qualified service personnel.
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ENVIRONMENTAL CONDITIONS
This instrument is intended for use under the following conditions:
1. indoor use;
2. altitude up to 2 000 m;
3. temperature 5 °C to 40 °C;
4. maximum relative humidity 80 % for temperatures up to 31 °C decreasing
linearly to 50 % relative humidity at 40 °C;
5. Mains supply voltage fluctuations up to ±10 % of the nominal voltage;
6. no pollution or only dry, non-conductive pollution.
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USES
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:
AC USE REPLACEMENT
To physically access the AC fuses, the power cord must be detached from the rear
panel of the instrument. The fuse drawer may then be extracted using a small flat-head
screwdriver, as shown below:
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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 USE 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.
USE RATINGS
The following table lists the required fuses:
uses
Nominal
Mains
Voltage
Rating Case Size
Recommended Replacement Part
Littelfuse Part
Number
Digi-Key Stock
Number
#1, #2 (AC) 100-240V 0.5A, 250V,
Time-Delay 5×20 mm 0218.500HXP 2416-ND
#3 (DC) N/A 0.5A, 250V,
Time-Delay 5×20 mm 0218.500HXP 2416-ND
#4 (DC) N/A 1.6A, 250V,
Time-Delay 5×20 mm 021801.6HXP 2424-ND
The recommended fuse manufacturer is Littelfuse (http://www.littelfuse.com).
Replacement fuses may be easily obtained from Digi-Key (http://www.digikey.com) and
other distributors.
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RONT 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. If this indicator is yellow, an internal automatic
overload protection circuit has been tripped. If the unit is overloaded (by operating at
an exceedingly high duty cycle or by operating into a very low impedance), the
protective circuit will disable the output of the instrument and turn the indicator light
yellow. The light will stay yellow (i.e. output disabled) for about 5 seconds after
which the instrument will attempt to re-enable the output (i.e. light green) for about 1
second. If the overload condition persists, the output will be disabled again (i.e. light
yellow) for another 5 seconds. If the overload condition has been removed, the
instrument will resume normal operation.
This overload indicator is only likely to come on in two situations:
Briefly at startup. This is not a cause for concern.
When the load impedance is too low (< 50 kΩ). In this case, turn off the
instrument and connect the proper load.
3. IN Connector . The input signal is applied to this connector. The input impedance is
approximately 1 kΩ. The input must not exceed ±2V.
4. GAIN Dial . This ten-turn dial is used to vary the amplifier gain between +1 and +100.
5. OUT Connector . This BNC connector provides the main output signal. The output is
an amplified version of the input on (3). The gain (VOUT/VIN) is controlled by (4).
Caution: Voltages as high as ±200V may be present on the center conductor of
this output connector. Avoid touching this conductor. Connect to this connector
using standard coaxial cable, to ensure that the center conductor is not exposed.
15
1
25
4
36

6. O SET Controls . (Optional: -OS option only.) This dial varies the DC offset on the
output from 0 to ±50V. The ON/O switch below the dial enables and disables this
function.
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REAR PANEL CONTROLS
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. AC USE DRAWER . The two fuses that protect the AC input are located in this
drawer. Please see the “ USES” section of this manual for more information.
3. DC USES . These two fuses protect the internal DC power supplies. Please see the
“ USES” sections of this manual for more information.
17
2
31

GENERAL IN ORMATION
BASIC CONTROL
The AV-110G-PS is a DC-350 kHz variable-gain linear amplifier. The gain is variable
from +1 to +100, and is adjusted by rotating the “GAIN” control.
The required voltage input signal is applied at the “IN” connector.
This mode is illustrated below:
CABLE LENGTHS
The length of cable used to connect the load to the output of the function generator
should be less than 3 feet (1 meter), and ideally less than 18 inches ( .5 meters). At
longer lengths, the transmission line reflections caused by the cabling and the cable's
capacitance will distort the output signal and degrade the rise and fall times, particularly
if the signals with fast rise times are used.
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ARBITRARY
WAVE ORM,
VIN, ± 2V MAXIMUM
INPUT VOLTAGE, ON
"IN" CONNECTOR
OUTPUT VOLTAGE, ON
"OUT" CONNECTOR
VOUT = VIN × GAIN,
GAIN = +1 TO +100,
ADJUSTABLE.
± 200V MAXIMUM.

OPERATIONAL CHECK
This section describes a sequence to confirm the basic operation of the instrument. It
should be performed after receiving the instrument. It is a useful learning exercise as
well.
Basic Test Arrangement
1) Connect a 50 kΩ, 1W non-inductive test load between the OUT connector and
ground. A higher resistance may also be used, in which case the power rating may
be reduced. If cabling is used, keep it less than 3 feet / 1 meter in length. Confirm
that the oscilloscope probe and the test load are rated for 200 Volt operation.
2) Set the signal generator to produce a ±2V, 10 kHz waveform. (The input impedance
of the AV-110G-PS is 1 kΩ). Connect a cable from the SYNC connector of the
signal generator to the TRIG input of an oscilloscope. Set the oscilloscope to trigger
externally. Connect the main output of the signal generator to the input of the
amplifier.
3) Connect one oscilloscope probe (channel A) to the output of the signal generator.
Set the Channel A vertical scale to 1 V/div.
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AVTECH
AMPLIFIER
OUT
CONNECTOR
REAL-TIME
OSCILLOSCOPE
CHANNEL A
CHANNEL B
IN
CONNECTOR
SIGNAL
SOURCE
(+2V maximum)
TRIG
MAIN OUTPUT
SYNC OUTPUT
AC
POWER
SCOPE
PROBE
TEST LOAD,
50 kΩ, 1 W
SCOPE
PROBE

4) Connect one oscilloscope probe (channel B) to the 50 kΩ load. On the
oscilloscope, set the channel A vertical scale to 50 V/div, and the horizontal scale to
100 us/div.
5) Set the gain control to minimum (0.0). Turn on the amplifier and the signal
generator.
6) Rotate the gain control to its maximum setting. The Channel B waveform should
increase to ±200V, and have a shape similar to that of the Channel A waveform.
7) This completes the operational check.
20