AR 1500W1000A Service manual

Operating and
Service Manual
1500W1000A
Model
10044529
Part Number
Serial Number
160 Schoolhouse Road, Souderton, PA 18964 • 215-723-8181 • Fax [phone] •www.arworld.us

Declaration of Conformity
Issue Date:
Model #/s:
Type of Equipment:
Function:
October 2020
Model 1500W1000A Series
RF Broadband Amplifier
Designed tobe used ina RFimmunity test system or for research. The unit isintended toamplify an RF
signal and inject it into a load.
The equipment described above is declared to be in conformity with the following applicable national and international standards.
The conformity is valid only when equipment is used in a manner consistent with the manufacturer’s recommendations and the
reference documents.
EMC:
DIRECTIVE 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of
the Member States relating to electromagnetic compatibility
EN 61326-1:2013 Electrical equipment for measurement, control and laboratory use–EMC requirements–Part 1: General
Requirements
SAFETY:
DIRECTIVE 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of
the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage
limits
CENELEC EN 61010-1 Issued 2010/10/01 Ed: 3
Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use – Part 1: General Requirements
UL 61010-1 Issued 2012/05/11 Ed: 3
Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use – Part 1: General Requirements
CAN/CSA C22.2 #61010-1 Issued 2012/05/11 Ed: 3
Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use – Part 1: General Requirements
HAZARDOUS SUBSTANCES (RoHS):
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 (recast)
Commission Delegated Directive (EU) 2015/863 of 31 March 2015 amending Annex II to Directive 2011/65/EU of the European
Parliament and of the Council as regards the list of restricted substances
Directive (EU) 2017/2102 of the European Parliament
and of the Council of 15 November 2017 amending Directive
2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment
RECYCLING (WEEE):
DIRECTIVE 2012/19/EU of the European Parliament and of the Council of 4 July 2012 on waste electrical and electronic
equipment (WEEE) (recast)
SUBSTANCES OF VERY HIGH CONCERN (REACH):
REGULATION (EC) 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the
Registration, Evaluation, Authorization and Restriction of Substances of Very High Concern Chemicals (SVHC)
Supporting documentation is held by AR RF/Microwave Instrumentation’s Quality department in Pennsylvania, United States.
Place of issue: AR RF/Microwave Instrumentation
160 Schoolhouse Road
Souderton, Pennsylvania 18964 USA
Authorized officer of the company:
Patricia Thrasher
Manager Quality & Service

Instructions for European EMC Conformity
WARNING
It is the responsibility of the user of this equipment to provide electromagnetic shielding, filtering and isolation which
is necessary for EMC compliance to Directive 2014/30/EU. The equipment must therefore be operated in a shielded
area which provides a sufficient level of attenuation to meet the radiated emissions and immunity specifications. The
following minimum levels are suggested for use in accordance with the rated power of the equipment.
Rated Power
Minimum shielding attenuation
100 watts
50 dB
101 - 1000 watts
60 dB
1001 - 10,000 watts
70 dB
Since this equipment is designed to generate high levels of Radio Frequency energy, it is also essential that the user
read and follow the “Instructions for Safe Operation” in this manual. If other equipment is operated in the shielded
room it may be disturbed by the amplifier.
ACHTUNG
Der Benutzer dieses Gerätes ist dafür verantwortlich, daß die elektromagnetische Abschirmung und Filterung
gewährleistet ist, welche gemäß Richtlinie 2014/30/EU notwendig ist. Das Gerät muß deshalb in einem geschirmten
Raum betrieben werden, welcher eine ausreichenden Schirmung bietet, um die Emissions- und
Störfestigkeitsspezifkation einzuhalten. Es werden folgenden Minimalwerte der Schirmdämpfung und Filterung in den
unterschiedlichen Leistungsklassen empfohlen.
Hochfrequenzleistung
min. Schirmdämpfung
100 Watt
50 dB
101-1000 Watt
60 dB
1001-10.000 Watt
70 dB
Falls andere elektrische oder elektronische Geräte gleichzeitig mit dem Gerät betrieben werden, kann es zu
Beeinflussungen kommen. Da das Gerät zur Erzeugung von Hochfrequenzenergie dient ist es daher auch unbedingt
notwendig, daß der Benutzer die Sicherheitsvorschriften in der Bedienungsanleitung liest und einhält.
AVERTISSEMENT
Il est de la responsabilité de l'utilisateur de cet équipement d'assurer la protection électromagnétique, le filtrage et
l'isolation nécessaires, afin de se conformer à la directive 2014/30/EU concernant la C.E.M. Par conséquent, cet
équipement doit être mis en fonctionnement dans une enceinte d'atténuation suffisante pour satisfaire aux
spécifications d'émissivité et de susceptibilité. Pour une utilisation conforme, les niveaux d'atténuation minimums
suivants sont suggérés en fonction de la puissance de sortie de l'équipement:
Puissance de sortie
Atténuation minimum de l'enceinte
100 Watts
50 dB
101 à 1.000 Watts
60 dB
1.001 à 10.000 Watts
70 dB
Puisque cet équipement est destiné à générer de forts niveaux R.F., il est essentiel que l'utilisateur se conforme aux
instructions de sécurité indiquées dans ce manuel. Tout autre équipement en fonctionnement dans la cage de Faraday
peut-être perturbé par 1'amplificateur.

INSTRUCTIONS FOR SAFE OPERATION
Revised 0517
Observe the following safety guidelines to help ensure your
own personal safety and to help protect your equipment and
working environment from potential damage.
INTENDED USE
This equipment is intended for general laboratory use in
generating, controlling, and measuring levels of
electromagnetic Radio Frequency (RF) energy. Ensure that the
device is operated in a location which will control the radiated
energy and will not cause injury or violate regulatory levels of
electromagnetic interference.
SAFETY SYMBOLS
These symbols may appear in your user manual or on
equipment.
This symbol is marked on the equipment when it
is necessary for the user to refer to the manual
for important safety information.
The caution symbol denotes a potential hazard.
Attention must be given to the statement to
prevent damage, destruction, or harm.
Dangerous voltages are present. Use extreme
care.
Indicates a terminal intended for connection to
an external conductor for protection against
electrical shock in case of a fault, or the terminal
of a protective earth (ground) electrode.
Indicates invisible laser radiation–do not view
directly with optical instruments.
Indicates frame or chassis ground connection
terminal.
Indicates alternating current.
Indicates this product must not be disposed of
with your other household waste.
Indicates that the marked surface and adjacent
surfaces can attain temperatures that may be hot
to the touch.
EQUIPMENT SETUP PRECAUTIONS
Review the user manual and become familiar with
all safety markings and instructions. Protection
provided by the equipment may be impaired if
used in a manner not specified by AR RF/Microwave
Instrumentation (AR).
•Follow all lifting instructions specified in this document.
•Place the equipment on a hard, level surface.
•Do not use the equipment in a wet environment, for
example, near a sink, or in a wet basement.
•Position your equipment so that the power switch is easily
accessible.
•Leave 10.2 cm (4 in) minimum of clearance on all vented
sides of the equipment to permit the airflow required for
proper ventilation. Do not restrict airflow into the
equipment by blocking any vents or air intakes.
Restricting airflow can result in damage to the equipment,
intermittent shut-downs or safety hazards.
•Keep equipment away from extremely hot or cold
temperatures to ensure that it is used within the specified
operating range.
•While installing accessories such as antennas, directional
couplers and field probes, take care to avoid any exposure
to hazardous RF levels.
•Ensure that nothing rests on your equipment’s cables and
that the cables are not located where they can be stepped
on or tripped over.
•Move equipment with care; ensure that all casters and/or
cables are firmly connected to the system. Avoid sudden
stops and uneven surfaces.
BEFORE APPLYING POWER
Your AR equipment may have more than one power supply
cable. Use only approved power cable(s). If you have not been
provided with a power cable for the equipment or for any AC-
powered option intended for the equipment, purchase a power
cable that is approved for use in your country. The power
cable must be rated for the equipment and for the voltage and
current marked on the equipment’s electrical
ratings label.
Incorrectly installing or using an incompatible line
voltage may increase the risk of fire or other
hazards. To help prevent electric shock, plug the equipment
and peripheral power cables into properly grounded electrical
outlets. These cables are equipped with three-prong plugs to
help ensure proper grounding. Do not use adapter plugs or
remove the grounding prong from a cable.
Do not modify power cables or plugs. Consult a licensed
electrician or AR trained service technician for equipment
modifications. Always follow your local/national
wiring rules.
Do not operate the equipment if there is physical
damage, missing hardware, or missing panels.
SAFETY GROUND
This equipment is provided with a protective earth
terminal. The mains power source to the
equipment must supply an uninterrupted safety
ground of sufficient size to attach wiring terminals,
power cord, or supplied power cord set. DO NOT USE this
equipment if this protection is impaired.

INSTRUCTIONS FOR SAFE OPERATION
HAZARDOUS RF VOLTAGES
The RF voltages on the center pin of an RF output
connector can be hazardous. The RF output
connector should be connected to a load before AC
power is applied to the equipment. Do not come
into contact with the center pin of the RF output connector or
accessories connected to it. Place the equipment in a non-
operating condition before disconnecting or connecting the
load to the RF output connector.
ACOUSTIC LIMITATIONS
If equipment noise exceeds 80dB, ear protection is required.
MAINTENANCE CAUTION
Adjustment, maintenance, or repair of the equipment must be
performed only by qualified personnel. Hazardous energy may
be present while protective covers are removed from the
equipment even if disconnected from the power source.
Contact may result in personal injury. Replacement fuses are
required to be of specific type and current rating.
ENVIRONMENTAL CONDITIONS
Unless otherwise stated on the product specification sheet, this
equipment is designed to be safe under the following
environmental conditions:
•Indoor use
•Altitude up to 2000m
•Temperature of 5°C to 40°C
•Maximum relative humidity 80% for temperatures up to
31°C. Decreasing linearly to 50% at 40°C.
•Main supply voltage fluctuations not to exceed ± 10% of
the nominal voltage or minimum and maximum
autoranging values.
•Pollution degree 2: Normally non-conductive with
occasional condensation. While the equipment will not
cause hazardous condition over this environmental range,
its performance may vary.
EQUIPMENT CONTAINING LASERS
AR Field Probes (FL/PL Series) and Field Analyzers
(FA Series) are Class 1 laser products containing
embedded Class 4 lasers. Under normal use, the
laser radiation is completely contained within the
fiber optic cables and poses no threat of exposure. Safety
interlocks ensure that the laser is not activated unless the
cables are properly connected. Always exercise caution when
using or maintaining laser products. Do not view directly
with optical instruments.
RF ANTENNAS
•This equipment (antenna or antenna assembly) may be
heavy, requiring two persons to lift. Use caution when
installing or removing unit. Follow all equipment setup
and lifting instructions specified in this document.
•Ensure connectors are appropriate for intended operation.
Connectors are specified in the user manual and product
specification sheet.
•Do not exceed the maximum RF input level stated in the
specifications. Refer to the user manual and product
specification sheet to determine the applicable RF levels.
•Excessive RF input could damage the equipment or
connectors, causing safety hazards.
•When in operation, the RF voltages on the antenna
elements can be hazardous. Do not come into contact with
the antenna or elements when the RF input connector is
connected to a live RF source.
•To avoid injury to personnel and accidental damage to
power amplifier or antenna, disable the RF output of
power amplifier before connecting or disconnecting the
input connection to the antenna.
•Perform periodic inspections of antenna and field probe
systems to verify calibration due date, proper operation,
and overall condition of equipment.
RACK MOUNTED TWT MODELS
Some TWT models are supplied without the removable
enclosure offered for benchtop use. These rack-mountable
models may be supplied with either carry handles or slides
and front handles installed. Follow all lifting instructions
specified in this document and installation instructions
supplied in the TWT user manual.
LIFTING INSTRUCTIONS FOR AR EQUIPMENT
Because most products must be
handled during distribution,
assembly and use, the risk of serious
injury due to unsafe product handling
should be a fundamental
consideration of every user. An
authoritative guideline for eliminating unwarranted risk of
injury caused by lifting is provided by the NIOSH Work
Practices (Publication #94-110) available at:
https://www.cdc.gov/niosh/docs/94-110/pdfs/94-110.pdf.
In general, observe the following guidelines for lifting a
weight of 50 lb or more:
•Use lifting eye (for floor standing) or side handles (table
top) to lift unit only.
•Use equipment of adequate capacity to lift and support
unit.
•If using forklift to move unit, be sure forks are long
enough to extend beyond the side of the unit.
•For additional information, follow the link specified
above.

Model 1500W1000A
iii
TABLE OF CONTENTS
TABLE OF CONTENTS ................................................................................................ iii
1. GENERAL INFORMATION..............................................................................1
1.1 General Description................................................................................................1
1.2 Specifications .........................................................................................................1
1.3 Power Supplies.......................................................................................................1
1.4 Protection Circuits..................................................................................................2
1.5 Installation..............................................................................................................2
1.5.1 Location..................................................................................................................2
1.5.2 Power......................................................................................................................3
1.5.3 Model 1500W1000A Driver Amplifier/500 Watt Amplifier Interconnection .......4
2. OPERATING INSTRUCTIONS ........................................................................9
2.1 General ...................................................................................................................9
2.2 Control and Indicator Functions.............................................................................9
2.2.1 Keylock Switch ......................................................................................................9
2.2.2 Power Switch........................................................................................................10
2.2.3 Main Power ..........................................................................................................11
2.2.4 RF ON/OFF..........................................................................................................11
2.2.5 Reset Function......................................................................................................11
2.3 Digital Control Panel (DCP) Operations..............................................................12
2.3.1 RF GAIN Control.................................................................................................14
2.4 Inputs and Outputs ...............................................................................................14
2.4.1 RF Input................................................................................................................14
2.4.2 RF Output.............................................................................................................14
2.4.3 IEEE-488, USB, and RS-232 Interfaces ..............................................................14
2.4.4 Safety Interlock Connector...................................................................................15
2.5 Amplifier Operation .............................................................................................15
2.5.1 Local Operation....................................................................................................15
2.6 Remote Operation.................................................................................................15
2.6.1 IEEE-488 (GPIB) Communication.......................................................................15
2.6.2 RS-232 Communication .......................................................................................16
2.6.3 Fiber-Optic Communication.................................................................................17
2.6.4 USB Communication ...........................................................................................18
2.6.5 Ethernet Communication......................................................................................18
2.6.6 Remote Commands ..............................................................................................19
3. THEORY OF OPERATION .............................................................................31
3.1 Introduction ..........................................................................................................31
3.2 RF Amplifier Operation .......................................................................................31
3.2.1 A1 Variable Gain Amplifier (Schematic No. 10033908, 10031972, 10032111).31
3.2.2 A3, A6, A7 Two-Way Splitter .............................................................................31
3.2.3 A2, A4, A5 Driver Amplifiers (Schematic 10034945) ........................................32
3.2.4 A10 Dual Detector Assembly (Schematic 10033688) .........................................32
3.2.5 Power Supplies, Driver Amplifier (PS1 and PS2)................................................32
3.3 RF Amplifier Operation (500 Watt Power Amplifier Schematic, 10039099)......33
3.3.1 A4 Two-Way Splitter ...........................................................................................33
3.3.2 A5, A6 Four-Way Splitters ..................................................................................33

ii
3.3.3 A7-A14 Final Amplifiers (Schematic 10036697) ................................................33
3.3.4 Power Supplies, 500 Watt Power Amplifiers (PS1 and PS2) ..............................34
3.4 Twelve-Way Combiner ........................................................................................34
3.5 A15 Two-Way Combiner/Dual Directional Coupler ...........................................34
3.6 Control System.....................................................................................................35
3.6.1 A12 Display Assembly, 4.3”, LCD (Schematics 10029679, 10030013) .............35
3.6.2 A14 Interface Board (Schematic #10020073)......................................................35
3.6.3 A11 ALC Board (Schematic #10023927) ............................................................35
4. TROUBLESHOOTING AND REPAIR ...........................................................37
4.1 General .................................................................................................................37
4.3 Fault Signal Interpretation and Diagnosis ............................................................37
4.3.1 General - Reading Faults......................................................................................37
4.3.2 Power Supply Faults.............................................................................................38
4.3.3 Thermal Faults......................................................................................................38
4.3.4 ALC Fault.............................................................................................................38
4.3.5 RF Module Faults.................................................................................................38
4.3.6 Fault Troubleshooting Guide ...............................................................................39
4.4 Diagnosing and Replacing Amplifier Modules....................................................40
4.4.1 Locating Modules.................................................................................................40
Appendix A. Installing Software Upgrades................................................................41
FIGURES
1-1 AC Line Cord Installation ......................................................................................3
2-1 Digital Control Panel (DCP) Features..................................................................10
2-2 Rear Panel Features ..............................................................................................11
2-3 Touch Panel Display Menu Map..........................................................................13
4-1 500W Amp Module Locations (Front View) .......................................................40
4-2 Driver Amp Module Locations (Side View) ........................................................40
TABLES
2-1 RS-232 Port Settings ............................................................................................16
2-2 RS-232 (DCE) Port Pinout Diagram DB-9 Female..............................................16
2-3. Fiber-Optic Serial Port Settings ...........................................................................17
2-4. Relationship between DCP Controls and Remote Communication .....................19

Rev B 1
1. GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The Model 1500W1000A is a self-contained, broadband solid-state amplifier designed for laboratory
applications where instantaneous bandwidth, high gain, and moderate power output are required. A GAIN
control, which is conveniently located on the unit’s front panel, can be used to decrease the amplifier’s gain
by 25 decibels (dB) or more. Solid state technology is used exclusively to offer significant advantages in
reliability and cost. A Model 1500W1000A, used with a frequency-swept signal source, will provide 1500
watts of swept power output from 80–1000 megahertz (MHz). Typical applications include antenna and
component testing, wattmeter calibration, and electromagnetic interference (EMI) susceptibility testing, as
well as usage as a driver for frequency multipliers and high-power amplifiers. The Model 1500W1000A can
be operated locally by using the unit’s front panel controls, or remotely by using the unit’s IEEE-488, RS-232
interface, USB, or Ethernet interface.
Special features incorporated into the Model 1500W1000A include the following:
•A Digital Control Panel (DCP) that allows both local and remote (via a computer interface) control of
the amplifier (including adjustment of the amplifier’s RF Gain during CW mode operation) and provides
graphical displays of the amplifier’s Forward and Reflected power levels.
•RF output level protection.
•A General Purpose Interface Bus (GPIB)/IEEE-488.2 interface for remote control of the amplifier’s
operating functions.
•RS232 serial communications including both wire and fiber-optic ports for remote control.
•USB Communication port for remote control.
•Ethernet Communication port for remote control.
•Protection is provided by DC current limiting, over-temperature shut down and RF power limiting.
1.2 SPECIFICATIONS
Refer to the AR RF/Microwave Instrumentation Data Sheet at the end of this section for detailed
specifications.
1.3 POWER SUPPLIES
The Model 1500W1000A contains three 500 watt power amplifiers and a driver amplifier.
The 500 watt power amplifiers each contain two switching power supplies. The input voltage range to the
power supplies is 200–240 VAC, 50-60Hz, selected automatically. The AC input power, combined for these
two supplies is approximately 1500 watts.
PS1 is a +23 volt, 1500 watt supply for the drain supply of the A7 through A14 W-Series modules.
PS2 is a multiple output supply. The main +24 volts DC supplies voltage to the cooling fans. The +12 volts
DC supplies voltage to the (A2) Overdrive Sense board. The -12 volts supplies the gates of A7-A14 modules.
Primary AC circuit protection is provided by the circuit breaker in the Power Entry Module.

Model 1500W1000A
2 Rev B
The driver amplifier also contains two switching power supplies. The input voltage range to the power
supplies is 120–240 VAC, 50-60Hz, selected automatically. The AC input power, combined for these two
supplies is approximately 1000 watts.
PS1 is a multiple output supply. The main +24 volts DC supplies voltage to the RF low level A1 and A7
overdrive sense board. The +12 volts DC is for operating the cooling fans and the –12 volts DC is supplied to
the A1, A3, A4 and A5 RF modules. Primary AC circuit protection is provided by the circuit breaker in the
Power Entry Module.
PS2 is a +23 volt, 44S switching power supply that supplies the drain voltage to driver modules A3, A4 and
A5.
The 1500W1000A cabinet also contains a 3-phase power distribution unit 360-435 VAC, 30 amp, 50/60Hz.
This allows the driver amplifier and the 500 watt amplifiers to operate from one power source.
1.4 PROTECTION CIRCUITS
Features incorporated into this unit include RF output level protection circuits, thermal protection circuits, and
internal DC level sensing and monitoring circuits that sense the voltage on each of the final and driver
amplifier modules. There is protection for the AC main circuit. All switching supplies are short circuit
protected. Reaching a threshold of either of the RF forward (incident) or reverse (reflected) power limit
adjustments, which are adjusted to approximately 1900 watts and 1500 watts respectively, will initiate
limiting, or smooth drive level fold-back, in a low-level stage of the amplifier chain. If the limiting circuits
cannot keep the amplifier’s levels below the limit threshold, the protection circuits will invoke a shutdown of
the main power supplies and low-level driver in the amplifier. Power amplifier modules are monitored for
both over-current and under-current. A RESET function is provided to permit re-powering of the amplifier in
case of transient or temporary activation of the amplifier’s protection circuitry. The low-level driver and
output amplifier subassemblies are thermally monitored.
The digital control panel monitors all fault signals, stores and displays any that are invoked and asserts the
required action.
1.5 INSTALLATION
Before proceeding, thoroughly inspect the amplifier for signs of physical damage that may have been incurred
during shipment and completely read the following installation and operating instructions, paying special
attention to all CAUTION notes.
1.5.1 Location
Select an operating location that will permit air to circulate freely around the amplifier’s cabinet. The Model
1500W1000A utilizes air cooling and should be located where the normal flow of air into or exiting from the
unit will not be restricted, diverted, or re-circulated through the unit itself; in particular, the flow of warm air
exiting the rear of the amplifier should not be impeded.
Do not position the unit next to a wall or other equipment that would restrict the flow of air into the bottom of
the unit or out of the rear of the unit.

Model 1500W1000A
3 Rev B
1.5.2 Power
The Model 1500W1000A is designed for a four-wire, three-phase power input: the four wires are for the three
phases and a safety ground (GND). The primary input voltage range is 200-240 VAC phase-to-phase. A 50-
amp common trip circuit breaker is used to supply power to the Model 1500W1000A.
CAUTION:
Dangerous voltages are present in the amplifier whenever plugged into an
AC outlet. Always disconnect the AC power line to the amplifier before
servicing the unit.
Due to the variety of power systems available internationally, line cords are not shipped with this unit. The
user must determine and install the appropriate line supply to the unit. To install the line cord, first remove
the three screws that hold the AC power input cover in place. Carefully lay the panel down horizontally to
gain access to the AC Power feed-thru terminal block. Prepare a line cord capable of safely supplying 50
amps or more and insert the line cord through the Romex strain relief on the AC power input cover.
Figure 1-1 shows how to properly connect the wires. Tighten the Romex strain relief and reinstall the cover
using the three screws removed previously.
Figure 1-1. AC Line Cord Installation

Model 1500W1000A
4 Rev B
1.5.3 Model 1500W1000A Driver Amplifier/500 Watt Amplifier
Interconnection
•RF outputs from the controller/driver amplifier to the 500 watt amplifier inputs are located at the rear of
the unit.
•RF outputs from the 500 watt amplifiers to the RF inputs of the two 12-way power combiners located in
the controller cabinet.
NOTE: The coaxial cables between the inputs and outputs of the driver and the outputs of the 500 watt
amplifiers to the Inputs of the 12-way combiner are phase matched. Do not alter the coaxial
cables length or substitute other coaxial cables for them. The outputs of the sub-amplifiers will
not combine properly, if these coaxial cables are not matched in phase, this will cause low power
output and cause additional stress to be placed on the sub-amplifiers and the final combiner.
•Fiber optic system control cables link each 500 watt amplifier to the driver amplifier for system control
signals and fault reporting.
•9-pin sub-miniature D cable assemblies link each 500 watt power amplifier to the driver for overdrive
sense and interlock protection.
NOTE: Fiber optic and 9-pin subminiature D cables must be in place for the amplifier to operate.
Reference block diagram 10036948 and assembly drawing 10036983 for interconnections.

All amplifier control functions and status indi-
cations are available remotely in GPIB/IEEE-
488 format and RS-232 hardware and fiber
optic, USB and Ethernet. The buss interface
connector is located on the back panel and
positive control of local or remote operation is
assured by a keylock on the front panel of the
amplifier.
Housed in a single equipment rack, the
1500W1000A provides readily available RF
power for typical applications such as RF sus-
ceptibility testing, antenna and component
testing, watt meter calibration, and as a driver
for frequency multipliers and higher power
amplifiers. A safety interlock can be imple-
mented via a rear panel connector.
The 1500W1000A has the ability to be up-
graded at a later date to the 2000W1000D,
3000W1000B, or 4000W1000B.
The export classification for this equipment is
EAR99. These commodities, technology or
software are controlled for export in accord-
ance with the U.S. Export Administration Regu-
lations. Diversion contrary to U.S. law is pro-
hibited.
The Model 1500W1000A is a self-contained,
air-cooled, broadband, completely solid-state
amplifier designed for applications where in-
stantaneous bandwidth and high gain are
required. Push-pull circuitry is utilized in all
high power stages in the interest of lowering
distortion and improving stability. The Model
1500W1000A, when used with an RF sweep
generator, will provide a minimum of 1500
watts of RF power.
The Model 1500W1000A is equipped with a
Digital Control Panel (DCP) which provides
both local and remote control of the amplifier.
The DCP uses a color LCD touch screen and a
single rotary knob to offer status reporting and
control capability. The display provides opera-
tional presentation of Forward Power and Re-
flected Power plus amplifier status. Special
features include a gain control, internal auto-
matic level control (ALC) with front panel con-
trol of the ALC threshold, forward and reflec-
tive RF sample ports for precise power meas-
urements and RF output level protection. Pro-
tection is provided by DC current level sensing
of all output stages.
Features
Specifications
1500W1000A
 1500 Watts CW
 80MHz–1000MHz
AR RF/Microwave
Instrumentation
160 School House Rd
Souderton, PA 18964
215-723-8181
For an applications engi-
neer call:800.933.8181
www.arworld.us
Typical Output Power 1500W1000A

RATED OUTPUT POWER: 1600 watts typical; 1500
watts minimum
INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum
POWER OUTPUT @ 3 dB compression:
Nominal 1600 watts, 1500 watts min up to 700
MHz, 1400 watts from 700 to 1000 MHz
POWER OUTPUT @ 1 dB compression:
Nominal 1450 watts, 1400 watts min up to 700 MHz;
1250 watts min from 700 to 1000 MHz
FLATNESS: ±2.0 dB maximum; ±1.5 dB typical
FREQUENCY RESPONSE: 80–1000 MHz instantane-
ously
GAIN (at maximum setting): 61.8 dB minimum
GAIN ADJUSTMENT (continuous range): 25 dB mini-
mum
INPUT IMPEDANCE: 50 ohms, VSWR 1.5:1 maximum;
1.3:1 typical
OUTPUT IMPEDANCE: 50 ohms nominal
MISMATCH TOLERANCE: 100% of rated power with-
out foldback. Will operate without damage or oscilla-
tion with any magnitude and phase of source and load
impedance. (See Application Note #27)
MODULATION CAPABILITY: Faithfully reproduces AM,
FM, or Pulse modulation appearing on input signal.
HARMONIC DISTORTION: Minus 20 dBc maximum at
1250 watts, -20 dBc typical @ 1500 watts
THIRD ORDER INTERCEPT POINT: 68 dBm typical
NOISE FIGURE: 8 dB maximum, 6 dB typical
PRIMARY POWER (specify voltage):
200-240 VAC Delta connected (4-wire)
360-435 VAC ye connected (5-wire)
50/60 Hz, three phase, 7000 watts
CONNECTORS
RF Input: Type N female, rear panel
RF Output: Type 1-5/8 female, rear panel
Forward sample: Type N female, front (-63 dBc)
Reverse sample: Type N female, front (-63 dBc)
Remote Interfaces:
IEEE-488 24-pin female
RS-232 9-pin Subminiature D, female
Fiber Optic ST Conn Tx and Rx RS-232
USB 2.0 Type B
Ethernet RJ-45
Safety Interlock: 15-pin Subminiature D, rear panel
COOLING: Forced air (self contained fans), enters
front and bottom
WEIGHT (approximate): 182 kg (400 lb)
SIZE (W x H x D): 56.1 x 175.3 x 97.6 cm (22.1 x 69 x
38.4 in)
ENVIRONMENTAL:
Operating Temperature: 5°C / +40°C
Operating Altitude: Up to 2000M
Shock and vibration: Normal Truck Transport
REGULATORY COMPLIANCE:
EMC EN 61326-1
Safety UL 61010-1
CAN/CSA C22.2 #61010-1
CENELEC EN 61010-1
RoHS DIRECTIVE 2011/65/EU
EXPORT CLASSIFICATION: EAR99
Graphs
Page 2
Specifications
1500W1000A
 1500 Watts CW
 80MHz–1000MHz

To order AR Products, call 215.723.8181. For an applications engineer call:800.933.8181. Direct to Service call: 215.723.0275 or
email: [email protected] For Faxing Orders:866.859.0582 (Orders Only Please) [email protected]
Approved for public release by AR RF/Microwave Instrumentation 071417
Page 3
1500W1000A
 1500 Watts CW
 80MHz–1000MHz
Graphs
1500W1000 Harmonics @1500 watts

Rev B 9
2. OPERATING INSTRUCTIONS
2.1 GENERAL
Operation of the Model 1500W1000A broadband amplifier is quite simple. The amplifier’s input signal,
whether swept or fixed in frequency, is fed into the jack marked RF INPUT, and the amplifier’s output signal
is taken from the jack labeled RF OUTPUT. The unit is turned on by activating the front panel POWER
switch. In the event of a major malfunction, protection is provided by a circuit breaker located on the unit’s
rear panel.
CAUTION:
The Model 1500W1000A Amplifier is typically not critical in regard to
source and load Voltage Standing Wave Ratio (VSWR) and will remain
unconditionally stable with any magnitude and phase of source and load
VSWR. However, placing the amplifier in the operate mode without a load
connected to the output connector is not recommended. It has also been
designed to withstand, without damage, RF input power levels up to
twenty (20) times its rated input of 1mW. However, signal levels higher
than 20mW or transients with high peak voltages can damage the
amplifier. Also, accidental connection of the Model 1500W1000A’s output
to its input (either through direct connection or parasitic feedback paths)
will cause oscillations that may permanently damage the unit’s input
transistors.
The 1500W1000A Amplifier is protected from input overdrive by an automatic level control circuit. The
1500W1000A RF power transistors are protected from over temperature by sensing the chassis temperature
near the RF output transistors. In the event of a cooling fan failure or an airflow blockage, the DC voltage will
be removed from the RF stages, when the chassis temperature reaches approximately 70°C.
Normal operation can be resumed after the chassis temperature drops below 70° C.
2.2 CONTROL AND INDICATOR FUNCTIONS
The Model 1500W1000A’s front panel is shown in Figure 2-1; the unit’s rear panel features are detailed in
Figure 2-2.
2.2.1 Keylock Switch
The Keylock Switch is provided for protection from unauthorized use or unexpected remote control of the
amplifier. The amplifier can only be turned on locally when the Keylock Switch is in the LOCAL position.
Likewise, the unit can only be turned on or controlled remotely when the Keylock Switch is in the REMOTE
position. Placing the Keylock Switch in the INHIBIT position places the amplifier in the RF Off mode and
prohibits any control of the amplifier.

Model 1500W1000A
10 Rev B
2.2.2 POWER Switch
The momentary POWER switch turns the main power to the amplifier on and off. The status of the green
light-emitting diode (LED) in the switch indicates whether the amplifier’s power is on or off. The main
power supply fans are active when power is on. The graphic display is active as long as the main power
circuit breaker of the amplifier power entry module is on.
2 3 4
5
1
6 7
Figure 2-1 Digital Control Panel (DCP) Features
Item
Title
Function
1 INHIBIT, LOCAL, REMOTE Keylock Switch, 3-position; key removal in INHIBIT position only
2 POWER POWER control with indicator LED
3
DISPLAY (TOUCH SCREEN)
Numerous parameter values and fault messages, plus manual input control
4 ADJUST Adjust knob to change selected variables
5
RF INPUT
Type N female connector
6
FWD Sample Port
Type N female connector
7
REV Sample Port
Type N female connector