AR 3000TP12G18 Operating And Service Manual
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AR 3000TP12G18 Operating And Service Manual

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Operating and
Service Manual
3000TP12G18
Model
10031733
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 3000TP12G18

  • Page 1 Operating and Service Manual 3000TP12G18 Model 10031733 Part Number Serial Number 160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.arworld.us...
  • Page 3 Souderton, PA. 18964 declare that our product(s); the Models 3000TP12G18 series RF amplifiers to which this declaration relates is in compliance with the requirements of the: EEC EMC Directive (89/336/EEC) in accordance with Article 10 (2) of the directive, with the provision that the user must install the equipment as directed by the “Instructions for European EMC Conformity”...
  • 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 Avoid sudden care. stops and uneven surfaces. BEFORE APPLYING POWER Indicates a terminal intended for connection to an Your AR equipment may have more than one power supply external conductor protection against cable. Use only approved power cable(s). If you have not been...
  • Page 8 EQUIPMENT CONTAINING LASERS to unsafe product handling should be AR Field Probes (FL/PL Series) and Field Analyzers a fundamental consideration of every (FA Series) are Class 1 laser products containing user. An authoritative guideline for embedded Class 4 lasers.
  • Page 9 ADDITIONAL WARNINGS & NOTES WARNING: This equipment operates at potentially lethal voltages. Only trained, qualified personnel should operate, maintain, or service it. CAUTION: The information in this document was obtained from reliable sources and was believed to be accurate at the time of publication. Since subsequent modifications to the machine may have been made, use this information only as a guide.
  • Page 10 Model 3000TP12G18...
  • Page 11 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 13: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS ....................i DESCRIPTION AND SPECIFICATIONS ............1 TWTA Description ....................1 Suggested Applications ..................1 Specifications ......................1 Test Data Sheet ...................... 1 THEORY OF OPERATION ................5 Design of the Amplifier ..................5 Description of the RF Subsystem ................
  • Page 14 Model 4000TP8G12 Troubleshooting ....................33 Non-Repairable Modules ..................33 Recommended Spare Parts .................. 34 TECHNICAL DOCUMENTATION ............... 35 Schematics ......................35 Parts Lists ......................35 Top Level Build Tree ................... 35 Sample Program for IEEE-488 Communication ..........35 FIGURES Front Panel Features .................... 11 Rear Panel Features .....................

  • Page 15: Description And Specifications

    General laboratory instrumentation SPECIFICATIONS Refer to the AR RF/Microwave Instrumentation Data Sheet at the end of this section for detailed specifications. 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.
  • Page 16 Model 3000TP12G18 Rev A...
  • Page 17 Specifications Features The Model 3000TP12G18 is a self contained, voltage, heater current, heater voltage, 3000TP12G18 forced air cooled, broadband traveling wave baseplate temperature and cabinet temperature. tube (TWT) microwave amplifier designed for Modular design of the power supply and RF pulse applications at low to moderate duty fac- components allow for easy access and repair.
  • Page 18 2μs. For pulses beyond 8μs, ex- ceeding 1kW will cause the unit to truncate the pulse. If exceeding .8% duty with reflected 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)

  • Page 19: Theory Of Operation

    2. THEORY OF OPERATION DESIGN OF THE AMPLIFIER The Model 3000TP12G18 TWT amplifier consists of two main subsystems. The power supply subsystem and the RF subsystem, which are discussed in Sections 2.2 and 2.3, respectively. These two subsystems work in conjunction with the control system. The heart of the microprocessor control system is the CPU board (A25450-000).

  • Page 20: Logic And Control Module

    Model 3000TP12G18 2.3.2 Logic and Control Module: This module controls the power supply, monitors all the voltages and currents of the unit, and provides protection for the power supply and the TWT. 2.3.3 Power Factor Corrector Module This switching module forces the line current waveform to follow the line voltage waveform. This minimizes the line harmonics and maintains the power factor near unity.

  • Page 21: 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 22: Installation

    Model 3000TP12G18 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.

  • Page 23: Cooling Requirements

    Model 3000TP12G18 3.2.3 Cooling Requirements The TWTA is provided with a number of cooling fans. It is important that air movement around the rear of the unit be unobstructed. CAUTION: Do not position the TWTA in such a way that the air intakes or outlets are blocked, or that the exhaust air flow is directed into air intakes.

  • Page 24: Rf Connections

    Model 3000TP12G18 3.2.5 RF Connections The RF output connector is WRD-62 waveguide. The RF input connector is type N. CAUTION: Never operate the TWTA without a matched output load rated for at least 8,000 watts, peak and/or 450W continuous. The TWTA is not provided with an output isolator.

  • Page 25: Front Panel Features

    Model 3000TP12G18 FRONT PANEL FEATURES Figure 3-1. Front Panel Features Table 3-1. Front Panel Features Label Title Function Main Power Switchable 15 amp circuit breaker S1…S4 “Soft Key” pushbuttons: various menu selection functions Standby Pushbutton: turns high voltage and heater off...

  • Page 26: Rear Panel Features

    Model 3000TP12G18 REAR PANEL FEATURES Figure 3-2. Rear Panel Features Table 3-2. Rear Panel Features Label Title Function FWD Sample Forward Power Sample Port: -50dB coupling factor, Type N female RF Input RF Input: Type N female RF Output RF Output: Type N female...
  • Page 27 Model 3000TP12G18 Menu screens - The screens at the highest level are called menu screens. There are five 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 28 Model 3000TP12G18 After activating the Sleep Mode, screen will display Cooling On while heaters cool down. System Off notifies user that the amplifier is in Sleep Mode To deactivate Sleep Mode, press the ON soft key. Amplifier will return to MENU 1. When deactivating the Sleep Mode, the heaters will require approximately a 5 minute heater time delay.
  • Page 29 Model 3000TP12G18 Some faults (EXTERNAL INHIBIT) will turn off the grid of the tubes to disable RF output while the fault is being displayed on the screen. HV will remain on during these faults. Once the fault is corrected, the fault will clear and the system will turn RF back on automatically.

  • Page 30: Front Panel Display And Soft Keys

    Model 3000TP12G18 FRONT PANEL DISPLAY AND SOFT KEYS 3.5.1 Overview 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.

  • Page 31: Menu Tree

    Model 3000TP12G18 Figure 3-4. Menu Tree Rev A...

  • Page 32: Menu Screens

    Model 3000TP12G18 3.5.2 Menu Screens 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 33: Sleep Mode

    Model 3000TP12G18 Remote: When Remote is off, a device connected to the TWTA computer interface may monitor the amplifier's status but may not control the Operate, Standby , RF Off, RF On, or Reset keys. When Remote is On, the external device has full control of the amplifier for safety reasons.

  • Page 34: Miscellaneous Screens

    Model 3000TP12G18 WARNINGS 2: allows the under forward power set-point to be entered. Adjusting this to the minimum value causes -OFF- to be selected, disabling this alarm. Pressing MORE again brings up the next screen, Warnings 3. WARNINGS 3: allows for the maximum reflected power level to be set. Note that these are warning levels at which the beep sounds;...

  • Page 35: Initial Turn On And Warm-Up Procedure

    Model 3000TP12G18 In the event that one of these appears, shut off the TWTA and contact an authorized service representative before proceeding. CAUTION: Attempts to operate the TWTA despite control unit problems may result in loss of the static RAM database and calibration information.

  • Page 36: Remote Ieee-488 Operation

    Model 3000TP12G18 • Adjust the RF generator to slowly increase the RF drive toward 0 dBm to reach the desired forward power on the display and power meter (connected to the forward sample port). The forward power display will become active, with a maximum reading when peak power output is achieved.
  • Page 37 Model 3000TP12G18 Command Function Units Response format RDTMPTWTHPA2F Returns TWT temp (°F), HPA2 °F TWT HPA2F=[ ]F RDTMPTWTHPA1C Returns TWT temp (°C), HPA1 °C TWTHPA1C=[ ]C RDTMPTWTHPA2C Returns TWT temp (°C), HPA2 °C TWTHPA2C=[ ]C RDTMPPSHPA1F Returns power supply temp (°F), HPA1 °F...

  • Page 38: Catalog Of Status Codes

    Model 3000TP12G18 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 or last command was successful.

  • Page 39: Catalog Of Fault Codes

    Model 3000TP12G18 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...

  • Page 40: Catalog Of System State Codes

    Model 3000TP12G18 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...

  • Page 41: Rf Operation

    Model 3000TP12G18 It is recommended that the RDSTAT command be used to provide the host program with a report on how a command was processed. A small sample program that can send commands and receive the strings returned by the TWTA is included in Section 5.6.

  • Page 42: Twta General Considerations

    Cooling during Operate Mode: AR TWTAs have their air outlets and inlets on the rear panels. It is important to prevent the heated air, which is expelled from the TWTA’s air outlets, from being recycled into the air inlets.
  • Page 43 Model 3000TP12G18 Explanation of Limiting the Time in Standby mode and of Repeated Operate Selection Traveling wave tubes tend to get “gassy” if they are left in a Standbymode for extended periods of time. In this Standby mode, the heater (filament) is on but there is no high voltage applied to the collector (or high voltage is applied to the collector but the grid is off).
  • Page 44 Model 3000TP12G18 Rev A...

  • Page 45: Maintenance

    4. MAINTENANCE The TWTA requires a minimum of routine maintenance. The only moving parts are the elements of switches, relays and blowers. Preventive maintenance is recommended in Section 4.3. In the event that the TWTA needs repairs, it is recommended that the unit be returned to the factory. However, some user service organizations may choose to perform their own corrective maintenance, and under some circumstances returning the unit to the factory may be impractical.
  • Page 46 Model 3000TP12G18 If there is accumulated dust on any of the air intake filters, remove them and clean them with dry compressed air. If the filters show signs of deterioration, purchase replacement units. If significant dust has been noted on the air intake filters, it may be desirable to vacuum the dust and debris from inside the enclosure.

  • Page 47: Troubleshooting

    Model 3000TP12G18 TROUBLESHOOTING Symptom Possible cause TWT or power supply overtemperature Air inlet filter(s) dirty Collector heat sink dirty Inadequate clearance behind TWTA High air inlet temperature Defective fan or fan driver No response when main power turned on Disconnected power cable Defective circuit breaker Control module display does not come up;...

  • Page 48: Recommended Spare Parts

    Model 3000TP12G18 RECOMMENDED SPARE PARTS A27824-100 Heater Power Supply Module A30467-000 Power Inverter A30594-001 Grid Modulator Assembly A33176-001 High Voltage Filter Assembly A33185-000 High Voltage Diode/Cap Assembly A23683-003 Power Factor Correction Module A26452-150 Low Voltage Power Supply Module E02822-000 SSPA, C-Band, 4.0-8.0 GHz...

  • 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, only documentation pertaining to the highest levels of the system and to system control logic is included.
  • Page 50 Model 3000TP12G18 Rev A...
  • Page 51 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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