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AR 250T8G18 Series Operating And Service Manual

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Operating and
Service Manual
250T8G18
Model
10012510
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 250T8G18 Series

  • Page 1 Operating and Service Manual 250T8G18 Model 10012510 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 250T8G18 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 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 6 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 7 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 8 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 9 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 10 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 11 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 12 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 13 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 15: Table Of Contents

    Non-Repairable Modules ..................29  TECHNICAL DOCUMENTATION ............... 31 5.1  Top Level Build Tree ................... 32  5.1.1  Standard Model ....................32  5.1.2  250 Watt IJ-Band TWTA AR with Sample and Input Connectors on Front Panel ........................33  5.2  Schematics ......................35  5.3 ...
  • Page 16 5.4.4  Parts List, Remote Control Board, A24369-000 ..........44  5.4.5  Parts List, Microwave Power Assembly 250IJ, A24380-042 ......45  5.4.6  Parts List, HPA Interface Board (Plastic), A25444-000 ........46  5.4.7  Parts List, 250 Watt IJ-Band TWTA, AR 10-1/2, A28880-943 ......49  5.5  Recommended Spare Parts .................. 50 ...

  • Page 17: Description And Specifications

    1. DESCRIPTION AND SPECIFICATIONS This manual provides operating, interfacing and selected service information pertinent to Amplifier Research Model 200T8G18A and 250T8G18 Broadband Microwave Amplifier. These models are 200 watt and 250 watt, respectively, I and J band traveling-wave tube amplifiers (TWTAs). This manual supports models offering additional special features.
  • Page 18 Model 200T8G18A/250T8G18 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 D...

  • Page 19: Specifications

    U.S. Export Administration Regu- current, heater voltage, baseplate temperature lations. Diversion contrary to U.S. law is pro- and cabinet temperature. hibited. AR RF/Microwave Instrumentation 160 School House Rd Souderton, PA 18964 215-723-8181 For an applications engi- neer call:800.933.8181...

  • Page 20: Test Data Sheet

    Specifications Page 2 POWER (fundamental), CW @ OUTPUT FLANGE: NOISE POWER DENSITY: 250T8G18 Nominal 300 watts (pulse on) Minus 70 dBm/Hz (maximum), Minus 72 Minimum 250 watts dBm/Hz (typical) Linear @ 1dB Compression 70 watts minimum (pulse off) Minus 140 dBm/Hz (typical) ...
  • Page 21 Input VSWR in Pass band (typical) 1.3:1 Input VSWR in Reject band (typical) 2.5:1 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 23: Theory Of Operation

    2. THEORY OF OPERATION DESIGN OF THE AMPLIFIER The Model 200T8G18A/250T8G18 TWT amplifier consists of four principal subsystems. Two of these subsystems, the microwave power assembly (A24380-040 for Model 200T8G18A, A24380-042 for Model 250T8G18) 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 24: Description Of The Power Supply

    Model 200T8G18A/250T8G18 Amplifier gain is determined by the solid state preamp (SSA), which has a voltage-controlled attenuator. The control head determines the output of a digital-to-analog converter (DAC) on the HPA interface board. The output of the DAC controls the SSA attenuator. The remote control board (A24369-000) mounted behind the front panel is provided with a circuit that increases the attenuation so that reverse power is limited to a safe level (on the order of 20 to 50 watts).

  • Page 25: 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 26: Mounting

    Model 200T8G18A/250T8G18 3.2.2 Mounting The TWTA may be operated as a standalone bench top unit, or it may be installed in a 19" rack. If rack mounting is desired, first remove the amplifier from the cabinet, then install the amplifier in the rack.. NOTE: Due to the weight of the unit, the lifting and removal of the amplifier from the cabinet is an operation requiring two people.

  • Page 27: Cooling Requirements

    Model 200T8G18A/250T8G18 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 28: Rf Connections

    Model 200T8G18A/250T8G18 3.2.5 RF Connections The RF output connector is type WRD-750 waveguide flange. 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 29: Front Panel Features

    Model 200T8G18A/250T8G18 FRONT PANEL FEATURES Refer to Figure 3-2 below and Table 3-1 for descriptions. Figure 3-2. TWTA Front Panel Features Table 3-1. Front Panel Feature Descriptions Item Title Function MAIN POWER Switchable 16 A. circuit breaker; connects primary power to power supplies. OPERATE Push-button;...

  • Page 30: Front Panel Display And Soft Keys

    Model 200T8G18A/250T8G18 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.
  • Page 31 Model 200T8G18A/250T8G18 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 32 Model 200T8G18A/250T8G18 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 33 Model 200T8G18A/250T8G18 Event Screen - From MENU 4, S2 (labeled EVENT) provides a display of events logged by the control system. These events include AC power-up, heater warm-up, change from standby to operate, faults, and resets. The events are stored in a first-in-first-out (FIFO) software buffer that has room for 100 events; as new events are logged, the older ones are discarded.

  • Page 34: Rear Panel Features

    Model 200T8G18A/250T8G18 REAR PANEL FEATURES See Figure 3-4 below and Table 3-2 for descriptions. Figure 3-4. TWTA Rear Panel Features Table 3-2. TWTA Rear Panel Feature Descriptions 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 Cooling air intake...

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

    Model 200T8G18A/250T8G18 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 A1J1. Set RF generator level below –50 dBm and set desired frequency in specified range. Connect a load suitable for 350 watts continuous operation to the output waveguide.

  • Page 36: Remote Ieee-488 Operation

    Model 200T8G18A/250T8G18 CAUTION: Emergency bypass operation disables external interlock and certain protective and diagnostic features. For this reason, the emergency bypass mode of operation should be used only when the control unit fails and when it is essential to remain on line. To access the manual controls, remove the two 4-40 screws securing the Emergency switch cover plate on the front panel.
  • Page 37 Model 200T8G18A/250T8G18 Command Function Units Response format STWTOTC Sets TWT overtemp warning setpoint (°C) °C RDPSOTF Returns power supply overtemp warning setpoint (°F) °F PSOTF=[ ]F SPSOTF Sets p. s. overtemp warning setpoint (°F) °F RDPSOTC Returns p. s. overtemp warning setpoint (°C) °C PSOTC=[ ]C SPSOTC...

  • Page 38: Catalog Of Status Codes

    Model 200T8G18A/250T8G18 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 39: Catalog Of System State Codes

    Model 200T8G18A/250T8G18 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 40: Catalog Of *Stb?; Response Codes

    Model 200T8G18A/250T8G18 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 41: Pulsed Operation

    Model 200T8G18A/250T8G18 A small sample program that can send commands and receive the strings returned by the TWTA is included in section 5.5. It is written in Hewlett-Packard's "Rocky Mountain" BASIC. The program assumes that the IEEE-488 bus is at address 7 and that the address of the TWTA is 01. Remote operation is determined by the application (software) program in the system controller.

  • Page 42: 3.10 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 200T8G18A/250T8G18 or 0.1 watts. This power is insignificant for a user operating at 200 watts (+53 dBm), but may be very noticeable to a user trying to operate below 1 watt (+30 dBm). [One watt is 0.5% of (23dB below) rated power for a 200-watt amplifier.] A field probe user who obtains a 200 V/M field with 200 watts, may see a field as high as [53dBm –...
  • Page 44 Model 200T8G18A/250T8G18 Rev D...

  • 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 Paragraph 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 V) some user service organizations may choose to perform their own corrective maintenance.

  • Page 46: Troubleshooting

    Model 200T8G18A/250T8G18 To open the enclosure: 1. Remove the amplifier from the cabinet or rack as follows: NOTE: Due to the weight of the unit, the removal of the amplifier from the cabinet or rack is a two- person operation. Disconnect power, RF and any other interface connectors.

  • Page 47: Non-Repairable Modules

    Model 200T8G18A/250T8G18 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 D...
  • Page 48 Model 200T8G18A/250T8G18 Rev D...

  • 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.

  • Page 50: Top Level Build Tree

    Model 200T8G18A/250T8G18 TOP LEVEL BUILD TREE 5.1.1 Standard Model A28880-943 250 WATT IJ-BAND TWTA, AR 10-1/2 SERIES A22520-062 IJ BAND POWER SUPPLY FOR TWT 5401 1A1A1 A24357-000 HEAT SINK/MOTHER BOARD 1A1A2 A23687-001 LOW VOLTAGE POWER SUPPLY MODULE 1A1A3 A16485-000 HPA LOGIC AND CONTROL MODULE...

  • Page 51: 250 Watt Ij-Band Twta Ar With Sample And Input Connectors On Front Panel

    Model 200T8G18A/250T8G18 5.1.2 250 Watt IJ-Band TWTA AR with Sample and Input Connectors on Front Panel A28880-946 1A1  A22520-062  IJ BAND POWER SUPPLY (PULSED) FOR TWT 5401  1A1A1  A24357-000  HEAT SINK/MOTHER BOARD  1A1A2  A23687-001  LVPS, 85-265VAC IN, 15V/4A, 5V/1.5A-15V/0.5A OUT ...
  • Page 52 Model 200T8G18A/250T8G18 Rev D...

  • Page 53: Schematics

    Model 200T8G18A/250T8G18 SCHEMATICS 10-16485-000 HPA Logic and Control (A16485-000) 10-24369-000 Remote Control Board with Foldback (A24369-000) 10-24380-000 Microwave Power Assembly (A24380-042) 10-28880-000 HPA 200W 10 1/2" Series (A28880-943) 10-25444-000 HPA Interface (A25444-000) Rev D...
  • Page 54 Model 200T8G18A/250T8G18 Rev D...

  • Page 55: Wiring Diagrams

    Model 200T8G18A/250T8G18 WIRING DIAGRAMS 20-22520-000 TWT Power Supply 10 1/2" Series (A22520-062) Rev D...
  • Page 56 Model 200T8G18A/250T8G18 Rev D...

  • Page 57: Parts Lists

    HPA logic and control assembly A22520-062 I/J band power supply (pulsed) for TWT 5401 A24324-000 HPA system front panel assembly A24369-000 Remote control board A24380-042 Microwave power assembly A25444-000 HPA interface board A28880-943 250W IJ band TWTA, AR 10-1/2” series Rev D...

  • Page 58: Parts List, Hpa Logic And Control Module, A16485-000

    Model 200T8G18A/250T8G18 5.4.1 Parts List, HPA Logic and Control Module, A16485-000 REF. DESIG. ETM P/N DESCRIPTION QUANTITY B16485-000 HPA LOGIC AND CONTROL BOARD C16333-000 CAP,33MF,25V,AERL,(NICHICON UVX1E330M) C2, C5, C15, C58 C31028-000 CAP,1000PF,200VDC,10%,CER,1% FAILURE,(KEMET CKR05 SERIES W/"V" OPTION) C3, C9, C10, C13, C14, C17, C31032-000 CAP,0.01MF,200VDC,10%,CER,1% FAILURE,(KEMET C19, C21, C22, C27, C28,...
  • Page 59 Model 200T8G18A/250T8G18 REF. DESIG. ETM P/N DESCRIPTION QUANTITY R47, R48 R22200-000 RES,20K,1/2W,1%,MF,100PPM,(DALE RN55D) R79, R80 R22470-000 RES,47K,1/2W,1%,MF,100PPM,(DALE RN55D) R42, R60, R61, R89 R23100-000 RES,100K,1/2W,1%,MF,100PPM,(DALE RN55D) R33, R55 R23698-000 RES,698K,1/2W,1%,MF,100PPM,(DALE RN55D) R23750-000 RES,750K,1/2W,1%,MF,100PPM,(DALE RN55D) R23845-000 RES,845K,1/2W,1%,MF,100PPM,(DALE RN55D) R23953-000 RES,953K,1/2W,1%,MF,100PPM,(DALE RN55D) R12, R15 R32020-000 TRIMPOT,10K,1/2W,10%,CERMET,20T,SIDE ADJ,(BECKMAN 67X)

  • Page 60: Parts List, Ij Band Power Supply (Pulsed) For Twt, A22520-062

    POWER BOARD ASSY (C.MODE) A21422-101 GRID MODULATOR FOR CW HPA ( W/PULSE OPTION) A21461-000 HV FILTER ASSEMBLY A22818-002 DIODE CAP ASSY A23683-000 1500W AVR CURRENT POWER FACTOR A23687-001 LOW VOLTAGE POWER SUPPLY MODULE A24357-000 HEAT SINK/MOTHER BOARD A25398-060 AR 200 IJ Rev D...

  • Page 61: Parts List, Hpa System Control Front Panel, A24324-000

    HPA DISPLAY BOARD A24369-000 REMOTE CONTROL BOARD H13029-000 PLASTIC KNOB WITH FINGER DIMPLE,(HP 01650- 47401) H17037-000 ESCUTCHEONAR2 1/2X1 1/4,(AR 1006659-1-101) H17038-000 PAL NUT FOR AR ESCUTCHEON,(AR 14048) J01031-000 CONN,MALE 3 PIN,.063,(MOLEX 03-06-20332) XJ26 J03013-000 CONN,PIN MALE,.063,(MOLEX 002-06-2103) N21564-001 DISPLAY VIEW WINDOW N22922-900...

  • Page 62: Parts List, Remote Control Board, A24369-000

    Model 200T8G18A/250T8G18 5.4.4 Parts List, Remote Control Board, A24369-000 REF. DESIG. ETM P/N DESCRIPTION QUANTITY REV B B24369-000 REMOTE CONTROL BOARD C4-C6 C04105-000 CAP,0.1MF,100V,20%,MON,(KEMET C331C104M1R5CA) C05223-000 CAP,2.2MF,35V,10%,SOLID SEALED TANT,RADIAL,(SPRAGUE 199D225X9035BA1) C31028-000 CAP,1000PF,200VDC,10%,CER,1% FAILURE,(KEMET CKR05 SERIES W/"V" OPTION) C31032-000 CAP,0.01MF,200VDC,10%,CER,1% FAILURE,(KEMET CKR06 SERIES W/"V"...

  • Page 63: Parts List, Microwave Power Assembly 250Ij, A24380-042

    Model 200T8G18A/250T8G18 5.4.5 Parts List, Microwave Power Assembly 250IJ, A24380-042 REF. DESIG. ETM P/N DESCRIPTION QUANTITY C04687-000 CAP,0.56MFD,265VAC,POLY,+/-10%,(ELECT CONCEPT MP4-13019K) E00888-009 CABLE,RF FLEX, 9,SMA,MALE TO MALE,20 GHZ,50 OHM,0.141 CABLE,INSULATED JACKET,[SRC 150- 150-150090] E00888-012 CABLE,RF FLEX,12,SMA,MALE TO MALE,20 GHZ,50 OHM,0.141 CABLE,INSULATED JACKET,[SRC 150- 150-150120] E00888-015 CABLE,RF FLEX,15,SMA,MALE TO MALE,20 GHZ,50...

  • Page 64: Parts List, Hpa Interface Board (Plastic), A25444-000

    Model 200T8G18A/250T8G18 5.4.6 Parts List, HPA Interface Board (Plastic), A25444-000 REF. DESIG. ETM P/N DESCRIPTION QUANTITY B25444-000 HPA INTERFACE BOARD C161 C03105-000 CAP,0.01MF,100V,CER,10%,RADIAL,(AVX SR201C103KAA) C171 C04223-000 CAP,0.22MF,35V,TANT,RADIAL, [JAMCO 33507] C20, C32, C100 C05153-000 CAP,1.5MF,35V,TANT,RADIAL,(JAMECO TM1.5/35) C129, C163 C05223-000 CAP,2.2MF,35V,10%,SOLID SEALED TANT,RADIAL,(SPRAGUE 199D225X9035BA1) C80, C81, C164 C06103-000...
  • Page 65 Model 200T8G18A/250T8G18 REF. DESIG. ETM P/N DESCRIPTION QUANTITY 0857-001) J16215-000 TEST JACK,GREEN,VERTICAL,(EF JOHNSON 105- 0854-001) J16216-000 TEST JACK,BLUE,VERTICAL,(EF JOHNSON 105- 0860-001) J18167-000 D-SUB,37 PIN,FEMALE,PCB MOUNT,RIGHT ANGLE (AMP 745784-4) J18180-000 CONN,D-SUB,15 PIN,MALE,STRAIGHT,PCB MOUNT (POSITRONIC MD15M3000) J31013-000 CONN,D-SUB,25 PIN,MALE,RIGHT ANGLE,PCB MOUNT,[AMP 747238-4] XJ1-XJ4 J31014-000 SPRING LATCH KIT,D-SUB,(AMPHENOL 17-529)
  • Page 66 Model 200T8G18A/250T8G18 REF. DESIG. ETM P/N DESCRIPTION QUANTITY SEMICONDUCTOR DS75451N] U6, U19, U34, U39, U60 U20148-000 IC,HEX INVERTER,SCHMIDTT TRIGGER,(74HC14) (SSD) U20730-000 IC,DUAL J-K FLIP FLOP W/RESET,(7473) (SSD) U21328-000 IC,QUAD 2 INPUT NAND,SCHMIDTT TRIGGER, (74HC132) (SSD) U21388-000 IC,3 TO 8 DECODER/DEMULTIPLEXER, INVERTING, (74HC138) (SSD) U21536-000 IC,DUAL 4 INPUT DIGTAL MULTIPLEXER,(74F153)

  • Page 67: Parts List, 250 Watt Ij-Band Twta, Ar 10-1/2, A28880-943

    Model 200T8G18A/250T8G18 5.4.7 Parts List, 250 Watt IJ-Band TWTA, AR 10-1/2, A28880-943 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A22520-062 IJ BAND POWER SUPPLY (PULSED) FOR TWT 5401 A24324-000 HPA SYSTEM CONTROL FRONT PANEL ASSEMBLY A24380-042 MICROWAVE POWER ASSEMBLY 250IJ A24381-040...

  • Page 68: Recommended Spare Parts

    Model 200T8G18A/250T8G18 RECOMMENDED SPARE PARTS A10010-000 Heater power supply module A10017-500 PWM board A21422-101 Modulator assembly A21461-000 High voltage filter assembly A22818-002 High voltage diode/cap assembly A23683-000 Power factor correction, 100-250V input A23687-001 Low voltage power supply module (220 V) E00809-000 Power supply, 28V, 150 W (Kepco FAW 28-3.5k) Y10051-000...

  • Page 69: Sample Program For Ieee-488 Communication

    Model 200T8G18A/250T8G18 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 70 Model 200T8G18A/250T8G18 Rev D...
  • Page 71 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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