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AR 250T6G18 Series Operating And Service Manual

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Operating and
Service Manual
250T6G18
Model
10037990
Part Number
Serial Number
160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.arworld.us

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Summary of Contents for AR 250T6G18 Series

  • Page 1 Operating and Service Manual 250T6G18 Model 10037990 Part Number Serial Number 160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.arworld.us...
  • Page 3 Amplifier Research 160 School House Road Souderton, PA. 18964 declare that our product(s); the Model 250T6G18 series RF amplifiers to which this declaration relates is in compliance with the following European directives: Low Voltage Directive: 2014/35/EU EMC Directive: 2014/30/EU Supplementary Information:...
  • 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 ADDITIONAL WARNINGS & NOTES WARNING: This equipment operates at potentially lethal voltages. Only trained, qualified personnel should operate, maintain, or service it. 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.
  • Page 16 Model 250T6G18...
  • Page 17 Suggested Periodic Maintenance for TWT Amplifiers 1. Keep monthly log of the voltages, currents and temperatures as shown on Menus. Also record Date, “Console” and “Operate” hours. Take readings in Operate mode with the gain at zero (0%) percent. Leave unit in Operate mode for 20 minutes (Max Duty if Pulsed Unit), and then record data.

  • Page 19: Table Of Contents

    CONTENTS CONTENTS ........................3 DESCRIPTION AND SPECIFICATIONS ............1 TWTA Description ....................1 Suggested Applications ..................1 Specifications ......................1 Accessories ......................1 Test Data Sheet ....................... 2 THEORY OF OPERATION ................5 Design of the Amplifier ..................5 Description of the RF Circuit ................. 5 Description of the Power Supply................
  • Page 20 Model 250T6G18 FIGURES Rear View Support Holes ..................8 Front Panel Features ..................... 12 Front Panel Display Screens ................. 13 Rear Panel Features ....................17 TABLES Front Panel Features ..................... 12 Rear Panel Features ....................17 Catalog of IEEE-488 Commands ................. 19 Catalog of Status Codes ..................

  • Page 21: Description And Specifications

    Equipment calibration • General laboratory instrumentation SPECIFICATIONS Refer to the AR Data Sheet on the following pages for detailed specifications. ACCESSORIES AR RF/Microwave Instrumentation offers a number of accessories for use with this amplifier including: • Directional coupler • Antenna •...

  • Page 22: Test Data Sheet

    Model 250T6G18 TEST DATA SHEET A Test Data Sheet for a specific unit is prepared at the time of manufacture and is included with the unit's copy of this manual. Rev A...

  • Page 23: Contents

    Diversion contrary to U.S. law is pro- heater voltage, baseplate temperature and hibited. cabinet temperature. MODEL 250T6G18 TYPICAL POWER OUTPUT AR RF/Microwave Instrumentation 160 School House Rd Souderton, PA 18964 215-723-8181 Freq GHz For an applications engi- neer call:800.933.8181...
  • Page 24 S1R Reflected sample port on rear panel, type N fe- male connector. Model number example: Model 250T6G18M2 would have option E3H front handles installed. 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...

  • Page 25: Theory Of Operation

    2. THEORY OF OPERATION DESIGN OF THE AMPLIFIER The Model 250T6G18 TWT amplifier consists of four principal subsystems. Two of these subsystems, the microwave power assembly (A24380-948) and the TWT power supply (A22520-062) are discussed in sections 2.2 and 2.3, respectively. The other two subsystems are the microprocessor control system and the TWTA packaging.

  • Page 26: Description Of The Power Supply

    Model 250T6G18 DESCRIPTION OF THE POWER SUPPLY The TWT power supply is of modular construction. Low voltage power for logic and control of the entire power supply assembly, the preamplifier, and the HPA interface board is provided by the low voltage power supply module (A23687-001).

  • Page 27: Operation

    3. OPERATION WARNINGS AND CAUTIONS Throughout this manual, the symbol: WARNING: Indicates that a hazard exists that may result in personal injury or loss of life. CAUTION: Indicates that failure to follow procedures may result in damage to the equipment. WARNING: DANGER - High Voltage Present: Electrical equipment in this TWTA generates and stores high-voltage energy that can result in fatal electrocution.

  • Page 28: Installation

    Model 250T6G18 INSTALLATION 3.2.1 Unpacking Upon receiving the TWTA, unpack the unit and inspect it for obvious signs of external damage. If damage is observed, notify the carrier and contact an authorized service representative. Save and store the shipping container in case the unit needs to be returned in the future for calibration or repair. CAUTION: The RF amplifier should not be operated if there is physical damage, missing hardware or missing panels.

  • Page 29: Cooling Requirements

    Model 250T6G18 3.2.3 Cooling Requirements The TWTA is provided with a cooling fan. It is important that air movement around the rear of the unit be unobstructed. CAUTION: For either bench or rack mounting, do not position the TWTA in such a way that the air intake or outlet are blocked, or that the exhaust flow is directed into the intake.

  • Page 30: Rf Connections

    Model 250T6G18 3.2.5 RF Connections The RF output connector is type WRD-650. CAUTION: Never operate the TWTA without a matched output load rated for at least 350 watts, continuous. The TWTA is not provided with an output isolator. Full reflected power may irreparably damage the TWT. Even with no drive, "looping"...

  • Page 31: External Interlock Connector

    Model 250T6G18 6. Gasket must be seated completely in waveguide groove. NOTE: If the gasket is not seated fully, it will pinch between the two parts and impair the connection. See below: Not seated fully CORRECT INCORRECT 7. Align waveguide with receptacle. Loosely install all hardware. If the waveguide does not align properly, do not proceed.

  • Page 32: Front Panel Features

    Model 250T6G18 FRONT PANEL FEATURES (Refer to Figure 3-2 below) ADJUS T INHIBIT LOCAL S T ANDBY OPERAT E REMOT E EXIT MAIN POWER Figure 3-2. Front Panel Features Table 3-1. Front Panel Features Item Title Function MAIN POWER Switchable circuit breaker; connects primary power to power supplies. OPERATE Push-button;...

  • Page 33: Front Panel Display And Soft Keys

    Model 250T6G18 FRONT PANEL DISPLAY AND SOFT KEYS The purpose of the front panel display is to permit the operator to access extensive information about the condition and operation of the TWTA. To accomplish this, a number of informational screens are programmed. It is important for the operator to be able to select the screen with the required information.
  • Page 34 Model 250T6G18 Menu screens - The screens at the highest level are called menu screens. There are four menu screens. At power on, the MENU 1 screen is displayed. Each of the menu screens has the soft key S4 labeled MORE. The MORE key (S4) causes the next menu screen to appear.
  • Page 35 Model 250T6G18 To activate Sleep Mode locally: Press the MORE soft key to get to MENU 2. At MENU 2 press the SETUP soft key to get to SETUP 1. At SETUP 1 press SET to activate Sleep Mode (turn heater and fan off). The system will ask Are you sure? Press SET again.
  • Page 36 Model 250T6G18 System Shutdown Screen - In the event of a system shutdown due to a latched fault (i. e., a fault such as body overcurrent or power low line that requires a reset), the MENU screen is replaced by a screen indicating the nature of the fault.

  • Page 37: Rear Panel Features

    Model 250T6G18 REAR PANEL FEATURES (See Figure 3-4 below) Figure 3-4. Rear Panel Features Table 3-2. Rear Panel Features Label Title Function 190-260 VAC IN AC power input connector REMOTE INTERFACE Remote control connector. EXTERNAL INTERLOCK Connector to remote temperature switch protecting the isolator load.

  • Page 38: Initial Turn On And Warm-Up Procedure

    Model 250T6G18 INITIAL TURN ON AND WARM-UP PROCEDURE Install the TWTA as discussed in Section 3.2. Provide an RF generator to the RF input Type N connector A2J1. Set RF generator level below -50dBm and set desired frequency in specified range. Connect a load suitable for 350 watts continuous operation to the output waveguide.

  • Page 39: Emergency Bypass Operation

    Model 250T6G18 EMERGENCY BYPASS OPERATION For reference, see schematic 10-24369-000 in Section 5.2. The TWTA is provided with a means of operating the amplifier manually in the event that there is a failure of the control module and it is imperative that the amplifier remain on line. CAUTION: Emergency bypass operation disables external interlock and certain protective and diagnostic features.
  • Page 40 Model 250T6G18 Command Function Units Response format RDIF Returns heater current If=[ ] RDIW Returns helix current Iw=[ ] RDTMPTWTF Returns TWT temp (°F) °F TWTF=[ ]F RDTMPTWTC Returns TWT temp (°C) °C TWTC=[ ]C RDTMPPSF Returns power supply temp (°F) °F PSF=[ ]F RDTMPPSC...

  • Page 41: Catalog Of Status Codes

    Model 250T6G18 Table 3-4. Catalog of Status Codes (The RDSTAT command causes the TWTA to return a string in the form STATUS=[code], where [code] is an ASCII number whose meaning is given below) Status Code Meaning No command was given. Last command was successful.

  • Page 42: Catalog Of System State Codes

    Model 250T6G18 Table 3-6. Catalog of System State Codes (The RDLOGIC command causes the TWTA to send a string containing an operational state code consisting of 4 ASCII characters representing hex digits. The response is in the form "Sys:[w][x][y][z][eol]" where the hex values of [w],[x],[y] and [z]are formed as shown below) z bit Meaning...

  • Page 43: Catalog Of Heater Auto Off Time Delay Codes

    Model 250T6G18 Table 3-8. *STB?; Response Codes (The command *STB?; causes the TWTA to send a string containing an operational state code consisting of 2 ASCII characters representing hex digits. The response is in the form "STATUS:[x][y][eol]" where the hex values of [x] and [y] are formed as shown below) y bit Meaning...

  • Page 44: Pulsed Operation

    Model 250T6G18 Remote operation is determined by the application (software) program in the system controller. This application program will aid the user in generating the Command Codes and displaying/monitoring the Status Codes. Consult the application program users instructions for Remote operation procedure. The application program should issue only one string at a time.

  • Page 45: Maintenance

    4. MAINTENANCE The TWTA does not require routine scheduled maintenance. The only moving parts are the elements of switches, relays and blowers. Preventive maintenance is recommended in Section 4.3. The TWTA is basically a factory repairable unit. However, since limited logic schematics and partial parts information is supplied in this manual (Section 5) some user service organizations may choose to perform their own corrective maintenance.

  • Page 46: Troubleshooting

    Model 250T6G18 Disconnect power, RF and any other interface connectors. On the rear of the unit, remove any screws used to connect brackets to amplifier (two on each bracket). On the front of the unit, remove the four screws (two outside screws on each side) mounting the front panel to the cabinet.

  • Page 47: Non-Repairable Modules

    Model 250T6G18 NON-REPAIRABLE MODULES The High Voltage Diode/Cap Assembly (A22818-002), the High Voltage Filter Assembly (A21461-000), the Modulator Assembly (A21422-101), and the Heater Supply (A10010-000) are encapsulated modules and are not repairable. Contact an authorized service representative if replacement modules are needed. Rev A...
  • Page 48 Model 250T6G18 Rev A...

  • Page 49: Technical Documentation

    5. TECHNICAL DOCUMENTATION NOTE: The purpose of this technical documentation section is to provide a guide to the TWTA for technician- level servicing. It is intended for use by qualified technical personnel who must troubleshoot and repair the TWTA in the field. Such repairs are typically limited to replacement of modules or major components. For this reason, documentation pertaining to the highest levels of the system and to system control logic is included.
  • Page 50 Model 250T6G18 Rev A...

  • Page 51: Sample Program For Ieee-488 Communication

    Model 250T6G18 SAMPLE PROGRAM FOR IEEE-488 COMMUNICATION 1000 ! *********************************************** 1010 IEEE-488 COMMUNICATIONS SOFTWARE 1030 7/24/92 AARON D. McCLURE 1040 ! *********************************************** 1041 DIM F$[80] 1042 DIM A$[80] 1050 CLEAR SCREEN 1060 INPUT "INPUT COMMAND TO SEND TO POWER SUPPLY. EXIT TO QUIT.",A$ 1070 IF A$="EXIT"...
  • Page 52 Model 250T6G18 Rev A...
  • Page 53 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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