AR 750W1000B Series Operating And Service Manual
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AR 750W1000B Series Operating And Service Manual

Rf broadband amplifier
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Operating and
Service Manual
750W1000B
Model
10048080
Part Number
Serial Number
160 Schoolhouse Road, Souderton, PA 18964 • 215-723-8181 • Fax 866-859-0582 • www.arworld.us

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  • Page 1 Operating and Service Manual 750W1000B Model 10048080 Part Number Serial Number 160 Schoolhouse Road, Souderton, PA 18964 • 215-723-8181 • Fax 866-859-0582 • www.arworld.us...
  • Page 3 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:...
  • Page 5 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.
  • Page 7 The caution symbol denotes a potential hazard. Attention must be given to the statement to prevent Your AR equipment may have more than one power supply cable. Use damage, destruction, or harm. only approved power cable(s). If you have not been provided with a Dangerous voltages are present.
  • Page 8 EQUIPMENT CONTAINING LASERS risk of serious injury due to unsafe AR Field Probes (FL/PL Series) and Field Analyzers (FA product handling should be a fundamental Series) are Class 1 laser products containing embedded consideration every user.
  • Page 9 Zur Vermeidung von Personen- oder Sachschäden gilt BEVOR SIE DAS GERÄT ANSCHLIESSEN es, die Hinweise zu beachten. Ihre AR-Ausrüstung hat möglicherweise mehr als ein Stromversorgungskabel. Gefährliche elektrische Spannungen sind vorhanden. Verwenden Sie nur zugelassene Stromkabel. Falls Sie kein Stromkabel oder Höchste Vorsicht ist geboten.
  • Page 10 Die meisten Geräte müssen während des Versands, der Montage und des Gebrauchs LASER-INFORMATION transportiert werden. Jeder Nutzer sollte sich AR - Feldsonden (FL/PL-Serie) und Feldanalysatoren (FA-Serie) über das Risiko von schweren Verletzungen sind Laserprodukte der Klasse 1 mit eingebetteten Klasse-4- durch unsachgemäße...
  • Page 11 électrode de mise à la Votre équipement AR peut disposer de plus d’un câble d’alimentation terre de protection. électrique. Utilisez uniquement un ou des câbles d’alimentation approuves.
  • Page 12 éliminer le risque injustifié de blessures causées par le levage est fournie par les méthodes de travail de NIOSH (publication Les sondes de champ AR (série FL/PL) et les analyseurs de n° 94-110) disponibles sur : champ (série FA) sont des produits laser de classe 1 contenant des lasers intégrés de classe 4.
  • Page 13 Er zijn gevaarlijke elektrische spanningen aanwezig. Wees uiterst voorzichtig. VOOR HET OPZETTEN VAN DE STROOM Uw AR-apparatuur kan meer dan een netvoedingskabel bezitten. Gebruik alleen goedgekeurde netvoedingskabel(s). Koopt een Wijst op een terminal aan die bedoeld is voor aansluiting netvoedingskabel die is goedgekeurd voor gebruik in uw land als u...
  • Page 14 APPARAAT DAT LASERS BEVAT distributie, de assemblage en het gebruik moeten worden behandeld, moet het risico AR-terreinsondes (FL/PL-serie) en terreinanalysatoren (FA- op ernstig letsel als gevolg van een serie) zijn laserproducten van klasse 1 met ingesloten onveilige behandeling van het product een klasse 4-lasers.

  • Page 15: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS ....................iii GENERAL INFORMATION ................1 General Description ....................1 Specifications ......................1 Power Supplies ....................... 1 Protection Circuits ....................2 Installation ......................2 1.5.1 Location ........................2 1.5.2 Power ........................3 OPERATING INSTRUCTIONS ................ 9 General ........................
  • Page 16 Model 750W1000B 2.6.6.13 Faults (750W1000B) ..................26 2.6.6.14 Operating Hours (RF On) ................27 2.6.6.15 Operating Hours (Power On) ................. 27 2.6.6.16 AC Power-On Defaults .................. 28 THEORY OF OPERATION ................29 Introduction ......................29 RF Amplifier Operation (Schematic 10046885) ..........29 3.2.1 A1 Variable Gain Amplifier (Schematics 10033907, 10031968, 10035521) ..
  • Page 17 Model 750W1000B Typical 12-Way Combiner Return and Insertion Loss ......... 41 Typical A2 Driver Module Response ..............42 Typical A1 Pre-Amplifier Response ..............42 4-10 750W1000B, Right Side, Modules A6-A7 and A10-A13 ........43 4-11 750W1000B, Left Side, Modules A14-A15 and A18-A21 ........44 4-12 Molex Connectors ....................

  • Page 19: General Information

    Protection is provided by DC current limiting, over-temperature shut down and RF power limiting. • SPECIFICATIONS Refer to the AR RF/Microwave Instrumentation Data Sheet at the end of this section for detailed specifications. POWER SUPPLIES The Model 750W1000B contains twelve final modules (HGQ) and a driver section. The driver section contains a PreAmp and final module (HGA).

  • Page 20: Protection Circuits

    Model 750W1000B PS3 is a +24V single output 1600W supply. It supplies the voltage to the A1 PreAmp and the drain voltage for final modules A2, A6, A7 and A10. PS4 is a +24V single output 3200W supply. It supplies the drain voltage to final modules A11 thru A15 and A18 thru A21.
  • Page 21 Model 750W1000B 1.5.2 Power The Model 750W1000B is designed to operate using AC primary power of 200–240 Volts Alternating Current (VAC), 50–60 Hz single phase, 3300 watts maximum. CAUTION: Dangerous voltages are present in the Model 750W1000B whenever the unit is plugged into an AC outlet. Always disconnect the unit from the main power line when servicing it.
  • Page 22 Model 750W1000B Rev B...

  • Page 23: Power

    The DCP uses a color LCD The export classification for this equipment is touch screen display to indicate the operate EAR99. status and fault conditions if an over- AR RF/Microwave Instrumentation 160 School House Rd Souderton, PA 18964 215-723-8181 For an applications engi- neer call:800.933.8181...
  • Page 24 NOISE FIGURE: 8 dB maximum; 6 dB typical HARMONIC DISTORTION: Minus 20 dBc maximum at 700 watts; minus 20 dBc typical at 750 watts SPURIOUS: Minus 73 dBc typical Ordering Options Contact your AR RF/Microwave Instrumentation Sales Associate for specific model configuration pricing.
  • Page 25 Page 3 Graphs 750W1000B  750 watts CW  80MHz–1000MHz...
  • Page 26 Page 4 Graphs 750W1000B  750 watts CW  80MHz–1000MHz...
  • Page 27 Page 5 Envelope Drawing 750W1000B  750 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: service@arworld.us For Faxing Orders:866.859.0582 (Orders Only Please) info@arworld.us Approved for public release by AR RF/Microwave Instrumentation...

  • Page 29: Operating Instructions

    2. OPERATING INSTRUCTIONS GENERAL Operation of the Model 750W1000B 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.

  • Page 30: Power Switch

    Model 750W1000B 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.

  • Page 31: Main Power

    Model 750W1000B 2.2.3 Main Power The Main Power circuit breaker and the RF output (N female) are located on the rear panel of the amplifier. Figure 2-2. Rear Panel Features 2.2.4 RF ON/OFF The RF ON/OFF touch screen button toggles the amplifier from a Standby to an Operate mode. The status of the function is indicated on the display as RF ON or RF OFF.

  • Page 32: Digital Control Panel (Dcp) Operations

    Model 750W1000B DIGITAL CONTROL PANEL (DCP) OPERATIONS The operations described in this section assume that the user is performing these operations from the amplifier’s front panel with the Keylock Switch in the LOCAL position. Remote control using a personal computer is available when the Keylock Switch is set to REMOTE. Refer to Section 2.5.5 for information on remote operation.

  • Page 33: Touch Panel Display Menu Map

    Model 750W1000B Figure 2-3. Touch Panel Display Menu Map Values shown on screens are for illustration only. Rev B...

  • Page 34: Rf Gain Control

    Model 750W1000B 2.3.1 RF GAIN Control The RF GAIN control is used to adjust the input attenuator of the preamplifier-leveler module. This control simply adjusts the output power level for a fixed input power level. To adjust the RF Gain, press the Select button from the Main Menu and then press the RF Gain button in the subsequent menu.

  • Page 35: Amplifier Operation

    Model 750W1000B AMPLIFIER OPERATION 2.5.1 Local Operation 1. Connect the input signal to the unit’s RF INPUT connector. The input signal level should be 0dBm maximum. 2. Connect the load to the unit’s RF OUTPUT connector. 3. Set the REMOTE/LOCAL switch to LOCAL. 4.

  • Page 36: Setting The Ieee-488 (Gpib) Address

    Model 750W1000B 2.6.1.1 Setting the IEEE-488 (GPIB) Address The IEEE-488 device address can be set to any number between 1 and 30. This selection is made by navigating to the GPIB address selection screen. To get there from the Main Menu, touch the User menu button followed by the I/O menu button and finally the GPIB menu button.

  • Page 37: Fiber-Optic Communication

    This port can be used in conjunction with either an AR model IF7000 RS-232 to Fiber-Optic Interface (1200 to 9600 baud only) or an AR model IF7001 USB to Fiber-Optic Interface (19200 baud only). Note that these devices use SMA connectors so a fiber-optic cable is needed with ST connectors on one end and SMA connectors on the other.

  • Page 38: Usb Communication

    Lantronix Ethernet devices. This list of found devices will include any connected AR Ethernet devices. By selecting one of the connected devices from the list, its IP address and subnet mask can be changed along with a number of other settings.

  • Page 39: Remote Commands

    Model 750W1000B 2.6.6 Remote Commands • If a command or query is unrecognized it is echoed back out the port it came in on. All commands and queries are terminated with a Line Feed character. • A Line Feed character is indicated by <LF> in subsequent command and query definitions. •...

  • Page 40: Power On/Off

    Model 750W1000B 2.6.6.1 Power On/Off This command controls the power on/off state of the amplifier. Syntax: POWER:x Parameters: State(x): OFF = power off ON = power on Response Format: None (No query for this command) Example: To turn the power on, send the following command: POWER:ON<LF>...

  • Page 41: Mode Select

    Model 750W1000B 2.6.6.4 Mode Select This command sets the ALC mode of the amplifier. MODE:x Syntax: Parameters: Mode(x): MANUAL = Set to Manual mode PULSE = Set to Pulse mode* ALC<space>INT = Set to ALC Internal mode ALC<space>EXT = Set to ALC External mode* Response Format: None (No query for this command) Example: To set the ALC mode to Manual mode, send the following command:...

  • Page 42: Identity

    = model designation n = firmware revision Example: To get the identity of the amplifier, send the following command: *IDN?<LF> Response: AR-RF/MICROWAVE-INST, MODEL,1.0<LF> 2.6.6.7 IO Board Firmware Revision Query to get the firmware revision of the I/O Board. Syntax: *IOB?

  • Page 43: Machine State

    Model 750W1000B 2.6.6.8 Machine State This query reads the RF gain, detector gain, ALC threshold, and ALC response time of the amplifier. Syntax: MSB? Parameters: None Query only (always requires a ? character) Response Format: RF<space>GAIN=x, DT<space>GAIN=x, THRES=x, RESP=y<LF> Value(x): For RF Gain, Detector Gain, and ALC Threshold: 0 = Minimum 100 = Maximum...

  • Page 44: State

    Model 750W1000B 2.6.6.9 State Query to find the state of the amplifier. Syntax: STATE? Parameters: None Response Format: STATE=<space>xyza<LF> Where: x, y, z, and a are each an ASCII character representing a hexadecimal character. They can be 0 to 9 or A to F. Each hexadecimal character represents a 4-bit binary number.

  • Page 45: Forward Power

    Model 750W1000B Example: To read the state, send the following query. STATE?<LF> Response: STATE=<space>8301<LF> (Remote Mode, Power On, RF OFF, and Manual Mode) 2.6.6.10 Forward Power Query to get the forward power. Syntax: FPOW? Parameters: None Response Format: FPOW=x<LF> Where: x = 0 to 99999 Values are corrected and linearized.

  • Page 46: Rf Gain

    Model 750W1000B 2.6.6.12 RF Gain Query to get the RF gain. RFG? Syntax: Parameters: None Response Format: RFG=<space>x<LF> Where: x = 0000 to 0100 Example: To find out the RF gain of the amplifier, send the following query: RFG?<LF> Response: RFG=<space>0075<LF>...

  • Page 47: Operating Hours (Rf On)

    Model 750W1000B 2.6.6.14 Operating Hours (RF On) Query to get the RF On operating hours. Syntax: Parameters: None Response Format: OH=x<LF> Where: x = 0 to 100000 Units are Hours. Values can be up to six digits in length. Leading zeros are read as spaces.

  • Page 48: Ac Power-On Defaults

    Model 750W1000B 2.6.6.16 AC Power-On Defaults Default settings that are applied at AC mains power-on can be changed by adding the following prefix to select commands. Syntax: DEFAULT: Compatible commands: Level Adjust LEVEL:GAIN LEVEL:DET (Not available on all models) LEVEL:THR (Not available on all models) LEVEL:RESP (Not available on all models)

  • Page 49: Theory Of Operation

    3. THEORY OF OPERATION INTRODUCTION The Model 750W1000B RF amplifier consists of a Pre-Amplifier and driver amplifier, a 2-Way Splitter, two 8-Way Splitters, 12 Final Modules, a 12-way combiner, a directional coupler, and a detector assembly. The driver amplifier section amplifies low level RF signals and provides RF signals that are matched in amplitude and phase to the 12 Final modules.

  • Page 50: A3 Two-Way Splitter

    Model 750W1000B drains at 4 amps current for the driver and 7 amps current for the finals. The RF stage has approximately 18 dB of gain for the finals and an output compression point of 50 watts or greater from final amplifiers A6-A13. Voltage comparator U1 senses the presence of the -8 VDC.

  • Page 51: Power Supplies, Driver Amplifier (Ps1 Thru Ps4)

    Model 750W1000B Power Supplies, Driver Amplifier (PS1 thru PS4) PS1 is a Triple output supply (+5V, +15V, -15V). +5V is supplied to the A34 Switch Breakout Assembly and A35 Regulator Assembly. +15V is supplied to the A24 Detector Assembly and A35 Regulator Assembly. - 15V is supplied A1 PreAmp and A35 Regulator Assembly.

  • Page 52: Control System

    Model 750W1000B CONTROL SYSTEM 3.8.1 A25 ALC Board (Schematic 10023927) This section describes the operation of the level control board. The level control board performs the following functions: Provides automatic level control of the amplifier’s output when the amplifier is placed in the ALC mode. •...

  • Page 53: Troubleshooting And Repair

    For a description of how these indications can be used to assist in troubleshooting the unit, please see Section 4.3, Fault Signal Interpretation and Diagnosis. Shipping instructions are as follows. To return an item, contact AR Customer Service for an RMA number and shipping instructions.

  • Page 54: Troubleshooting

    Model 750W1000B TROUBLESHOOTING CAUTION: The transistors used in the Model 750W1000B amplifier are GaN HEMT transistor. These devices are very reliable when installed in a suitable circuit, but they can be easily damaged by improper troubleshooting or handling techniques. The gate junctions of the GaN HEMTs have a high input impedance and are susceptible to static damage or damage due to the use of an ungrounded soldering iron.

  • Page 55: General - Reading Faults

    Model 750W1000B 4.3.1 General - Reading Faults The Model 750W1000B incorporates relatively simple fault detection circuitry, which makes use of the digital display panel to alert the user or technician which component(s) need service. Use of these indications can usually expedite troubleshooting of the amplifier. Most faults can be immediately determined down to the assembly level.

  • Page 56: Interlock Fault (Schematic 10046885)

    Model 750W1000B 4.3.4 Interlock Fault (Schematic 10046885) The Model 750W1000B is equipped with an interlock connector, which is located on the rear panel. The interlock circuit can be used to sense the openings of doors to screen rooms, test chambers, and so forth, and to turn off RF energy when these doors are opened.

  • Page 57: Amplifier Faults (Schematics 10046885 And 10045396)

    Model 750W1000B 4.3.6 Amplifier Faults (Schematics 10046885 and 10045396) 1. The individual fault outputs for the A2 Driver Module and the A6-A7, A10-A15 and A18-A21 Final Modules are sensed on the A26A3 Switch Breakout Assembly, J5, pins 9 through 25. 2.

  • Page 58: Low Or No Power Output (Rf Test) (Schematic 10046885)

    Model 750W1000B 6. Check the voltage on the feed thru caps of the A1 Pre-Amp, with the RF gain control at maximum gain. Troubleshoot any incorrect voltages. +24.0 V ±0.5 V –15.0 V ±0.5 V +4.7 V ±0.5 V 7. Check the voltages on the feed thru caps of the A6, A7, A10-A15 and A18-A21 Final Amplifiers. +24.0 V ±0.3 V –15.0 V...

  • Page 59: Typical Response At -20 Dbm Input

    Model 750W1000B Figure 4-2. Typical Response at -20 dBm Input 2. Phase matching must be maintained from the input of the A3 Two-Way Splitter to the inputs of the A22 12-Way Combiner Figure 4-3; if coaxial cables are removed, they must be reinstalled in the same locations from which they were removed.

  • Page 60: Input Of Two-Way Splitter Thru 8-Way Splitter

    Model 750W1000B NOTE: If the original gain is low, the amplifier chain can be separated into two halves at the input to the A3 Two-Way Splitter thru the A4 8-Way Splitter. W5 should be terminated into 50 Ohms (Final Modules A6, A7, A10-A13).

  • Page 61: Typical Eight-Way Splitter Insertion Loss

    Model 750W1000B 4. 8-way splitter performance (A4, A5) and the 12-way combiner performance (A22) is displayed in Figures 4-6 and 4-7. Figure 4-6. Typical Eight-Way Splitter Insertion Loss Figure 4-7. Typical 12-Way Combiner Return and Insertion Loss Rev B...

  • Page 62: Typical A2 Driver Module Response

    Model 750W1000B 5. The typical response for the A1 Pre-Amplifier (at maximum gain setting) is shown in Figure 4-8. Figure 4-8. Typical A2 Driver Module Response NOTE: The A1 Pre-Amplifier’s response may differ considerably—particularly in flatness—from the typical responses shown in the Figure 4-9. The typical response for the A1 Pre-Amplifier (at maximum gain setting) is shown in Figure 4-9.

  • Page 63: Locating And Replacing Modules

    Model 750W1000B LOCATING AND REPLACING MODULES Remove rack enclosure panels and amplifier side panels to gain access to Final modules. See Figures 4-10 and 4-11. Figure 4-10. 750W1000B, Right Side, Modules A6-A7 and A10-A13 Rev B...

  • Page 64: Molex Connectors

    Model 750W1000B Figure 4-11. 750W1000B, Left Side, Modules A14-A15 and A18-A21 Disconnect the green Molex connectors, the SMA input and output connectors and the four screws holding the module in place. See figures 4-12 and 4-13 Figure 4-12. Molex Connectors Rev B...

  • Page 65: Sma Module Input

    Model 750W1000B Figure 4-13. SMA Module Input Install replacement module and secure with four screws. Reconnect SMA input and output cables and reconnect Molex connector. Ensure amplifier functionality before reinstalling side and enclosure covers. Figure 4-14. Final Module Rev B...
  • Page 66 Model 750W1000B Rev B...

  • Page 67: Appendix A. Installing Software Upgrades

    The 750W1000B has the capability to upgrade software. The first step that should be taken is to power-down the unit from the front panel. 1. Go to the AR Website and download the AR Firmware Upgrade Utility along with the model specific upgrade file for the device being upgraded.
  • Page 68 Model 750W1000B Rev B...
  • Page 69 These modules are not field-repairable and should never be opened outside of AR’s Microelectronics Lab. The modules in these product lines have a security label on two sides of the modules between the housing and lid/cover. If the security label is removed and or cut, the warranty of the module will be voided.

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