AR 40T26G40A Operating And Service Manual
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AR 40T26G40A Operating And Service Manual

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Operating and
Service Manual
40T26G40A
Model
10009284
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 40T26G40A

  • Page 1 Operating and Service Manual 40T26G40A Model 10009284 Part Number Serial Number 160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.arworld.us...
  • Page 3 160 School House Road Souderton, PA 18964 declare that our product; the Model 40T26G40A amplifier to which this declaration relates is in compliance with the requirements of the EEC EMC Directive (89/336/EEC) and Low Voltage Directive (73/23/EEC) in accordance with the...
  • Page 5 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 6 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 7 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 9 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 11: Table Of Contents

    Parts List, HPA Logic and Control Module, A16485-000 ......... 34 5.3.2 Parts List, HV Power Supply for TWT 6193A4/D4, A22826-352..... 36 5.3.3 Parts List, Emergency Bypass Board, A24830-001..........37 5.3.4 Parts List, HPA Interface Board (Plastic), A25444-000........38 5.3.5 Parts List, HPA 40W 26.5-40GHZ (AR) A28050-352........41...
  • Page 12 Catalog of Status Codes ..................19 Catalog of Fault Code Returned by RDFLT Command........20 Catalog of System State Codes ................21 *STA?; Response Codes ..................21 *STB?; Response Codes ..................22 Catalog of Heater Auto Off Time Delay Codes ...........22 Model 40T26G40A TWT Troubleshooting Guide..........26...

  • Page 13: Description And Specifications

    Equipment calibration • General laboratory instrumentation SPECIFICATIONS Refer to the AR Worldwide Data Sheet at the end of this section for detailed specifications. ACCESSORIES AR Worldwide offers a number of accessories for use with this amplifier, including: • Directional coupler...

  • Page 14: Test Data Sheet

    Model 40T26G40A 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 15: Specifications

    Specifications Features The Model 40T26G40A is a self contained, and RF components allow for easy access and 40T26G40A forced air cooled, broadband traveling wave repair. Use of a switching mode power supply tube (TWT) microwave amplifier designed for results in significant weight reduction.
  • Page 16 Specifications Page 2 POWER (fundamental), CW, @ OUTPUT CONNECT- 40T26G40A OR: Nominal, 45 watts; Minimum, 40 watts; Linear @ 1dB Compression 10 watts minimum  M1–M12 FLATNESS: ± 8 dB  40 Watts CW FREQUENCY RESPONSE: 26.5–40 GHz instantane-  26.5GHz–40GHz ously INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum...
  • Page 17 S7E, S1R, Example: Model number example: Model 40T26G40AM1 would have option E1C, no outer enclosure. 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 19: Theory Of Operation

    2. THEORY OF OPERATION DESIGN OF THE AMPLIFIER The Model 40T26G40A TWT amplifier consists of four principal subsystems. Two of these subsystems, the microwave power assembly (A28051-002) and the TWT power supply (A22826-352), are discussed in sections 2.2 and 2.3, respectively.

  • Page 20: Description Of The Power Supply (A22826-352)

    Model 40T26G40A Amplifier gain is set by the voltage-controlled variable gain 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 attenuator’s loss. The emergency bypass board (A24830-001) is mounted behind the front panel. It is provided with a circuit that increases the attenuation so that reflected power is limited to a level on the order of 10 watts.

  • 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: Mounting

    Model 40T26G40A 3.2.2 Mounting The TWTA may be operated as a stand-alone bench-top unit, or it can be installed in a 19-in. rack. If rack mounting is desired, first remove the amplifier from the cabinet, then install the amplifier in the rack.

  • Page 23: Cooling Requirements

    Model 40T26G40A 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-top or rack mounting, do not position the TWTA in such a way that the air intake or air outlets are blocked, or that the exhaust flow is directed into the air intake.

  • Page 24: External Interlock Connector

    Model 40T26G40A 3.2.6 External Interlock Connector The TWTA is provided with an external interlock capability via a 15-pin female D-sub connector, J2. To enable the high-voltage power supply, it is necessary to provide continuity between J2 pins 3 and 4. If the amplifier shuts down because the interlock was opened, it will be necessary to reset the system to return to standby (see System Shutdown Screen in section 3.4).

  • Page 25: Front Panel Features

    Model 40T26G40A FRONT PANEL FEATURES Front panel features are shown in Figure 3-2. Model 40T26G40 STANDBY OPERATE 40 Watts INHIBIT 26.5 - 40 GHz LOCAL REMOTE EXIT MAIN POWER Figure 3-2. TWTA Front Panel Table 3-1. TWTA Front Panel Features...

  • Page 26: Front Panel Display And Soft Keys

    Model 40T26G40A 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. In order to accomplish this, a number of informational screens are programmed.
  • Page 27 Model 40T26G40A 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. From MENU 4, MORE causes MENU 1 to reappear.
  • Page 28 Model 40T26G40A 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 29 Model 40T26G40A 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 30: Rear Panel Features

    Model 40T26G40A REAR PANEL FEATURES Rear panel features are shown in Figure 3-4. Figure 3-4. TWTA Rear Panel Features Table 3-2. TWTA Rear Panel Features Item Title Function AC POWER IN AC power input connector: IEC-320 connector IEEE-488 Remote control connector: 24-pin hermaphrodite EXTERNAL INTERLOCK Connector to remote temperature switch protecting the isolator load;...

  • Page 31: Emergency Bypass Operation

    Model 40T26G40A Push S4 (MORE) three times to go to MENU 4. Verify that the heater voltage and current are near their nominal levels. The values of these parameters at the time the TWTA left the factory are logged on the test data sheet.

  • Page 32: Remote Ieee-488 Operation

    Model 40T26G40A REMOTE IEEE-488 OPERATION The TWTA is provided with an IEEE-488 interface that permits remote emulation of OPERATE, STANDBY, and RESET push-buttons as well as access to parameter measurements, system faults, and control unit status. The following tables summarize the commands and the return codes.

  • Page 33: Catalog Of Status Codes

    Model 40T26G40A Command Function Units Response format RDPRD Returns reverse power out (dBm) Pr=[ ]dBm RDPRW Returns reverse power out (W) watts Pr=[ ]W RDPOHID Returns over forward power warning setpoint (dBm) Pohi=[ ]dBm SPOHID Sets over forward power warning setpoint (dBm)

  • Page 34: Catalog Of Fault Code Returned By Rdflt Command

    Model 40T26G40A Table 3-5. Catalog of Fault Codes (The RDFLT command causes the TWTA to return a string in the form flt=[code], where [code] is an ASCII number whose meaning is given below) Fault Code Meaning No fault System Fault...

  • Page 35: Catalog Of System State Codes

    Model 40T26G40A 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 36: Stb?; Response Codes

    Model 40T26G40A 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...

  • Page 37: Twta General Considerations

    Operate mode may be selected again. This procedure may be repeated, if needed up to 25 times, until the Operate mode is actually set. If this condition persists, contact AR Worldwide Service for additional assistance. (See Explanation of…, below) Noise Power Density (NPD): TWTAs produce rf noise over their operating frequency range, as specified by the Noise Power Density (NPD).
  • Page 38 Model 40T26G40A accumulates and results in a significant indication in a broadband measurement device – such as a power meter or field probe. The error produced by this indication is not significant when operating near rated TWTA power levels, but may cause difficulty when trying to operate high power TWTAs at low output power levels..

  • Page 39: Maintenance

    4. MAINTENANCE The Model 40T26G40A TWTA does not require routine scheduled maintenance. The unit’s only moving parts are the switches, the relays, and the blower. Preventive maintenance is recommended in section 4.3. It is recommended that, whenever possible, the TWTA should be returned to the factory for repair. However, since limited logic schematics and partial parts information are supplied in this manual (see Section 5), some user service organizations may choose to perform their own corrective maintenance.

  • Page 40: Troubleshooting

    Remove any dirt from around the three high-voltage connectors. While the cover is removed, check for loose wires, components, or fasteners. Reassemble in the reverse order. TROUBLESHOOTING Table 4-1. Model 40T26G40A TWTA Troubleshooting Guide Symptom Possible cause TWT or power supply overtemperature...

  • Page 41: Non-Repairable Modules

    Model 40T26G40A NON-REPAIRABLE MODULES The High-Voltage Diode/Capacitor Assembly (A23707-488), the High-Voltage Filter Assembly (A21461- 488), and the Heater Supply (A25963-000) are encapsulated modules and are therefore not repairable. Contact an authorized service representative if replacement modules are needed. Rev A...
  • Page 42 Model 40T26G40A Rev A...

  • Page 43: Technical Documentation

    5. TECHNICAL DOCUMENTATION 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 44: Top Level Build Tree

    A10017-488 PWM BD FOR TWT MEC-5493E 1A1A11 A25391-488 FACTORY SELECT PARTS FOR TWT MEC-5493E A28051-002 MICROWAVE POWER ASSEMBLY, KA BAND, 40 WATT A27752-300 AR TWTA CONTROL ASSY 1A3A1 A25450-000 CPU BOARD W/POWERFAIL (20MHZ) 1A3A2 A25425-001 HPA DISPLAY BOARD 1A3A3 A22488-003...

  • Page 45: Schematics

    Model 40T26G40A SCHEMATICS 10-16485-000 HPA Logic and Control (A16485-000) 10-24830-000 Emergency Bypass Board (A24830-001) 10-25444-000 HPA Interface (A25444-000) 10-28050-352 HPA 40T Series (A28050-352) Rev A...
  • Page 46 Model 40T26G40A Rev A...

  • Page 47: Parts Lists

    Power supply for Teledyne TWT A24830-001 Emergency bypass board (for reflected foldback) A25444-000 HPA interface A28050-352 HPA 40W 26.5-40 GHz (AR) A28051-002 Microwave power assembly, Ka-band, 40 watt Teledyne tube A28052-000 Wiring kit for 40T series K/Ka TWTA Rev A...

  • Page 48: Parts List, Hpa Logic And Control Module, A16485-000

    Model 40T26G40A 5.3.1 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...
  • Page 49 Model 40T26G40A 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...

  • Page 50: Parts List, Hv Power Supply For Twt 6193A4/D4, A22826-352

    Model 40T26G40A 5.3.2 Parts List, HV Power Supply for TWT 6193A4/D4, A22826-352 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A10017-488 PWM BD FOR TWT MEC-5493E A16485-488 HPA LOGIC AND CONTROL MODULE FOR 40K, 40KA A21461-488 HV FILTER FOR TWT MEC-5488 A23683-100...

  • Page 51: Parts List, Emergency Bypass Board, A24830-001

    Model 40T26G40A 5.3.3 Parts List, Emergency Bypass Board, A24830-001 REF. DESIG. ETM P/N DESCRIPTION QUANTITY B24830-000 EMERGENCY BYPASS BOARD C3-C5 C04105-000 CAP,0.1MF,100V,20%,MON,(KEMET C331C104M1R5CA) C30010-000 CAP,10MF,35V,TANT,RADIAL,(NEMCO TB10-35K1) 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" OPTION)

  • Page 52: Parts List, Hpa Interface Board (Plastic), A25444-000

    Model 40T26G40A 5.3.4 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...
  • Page 53 Model 40T26G40A 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]...
  • Page 54 Model 40T26G40A REF. DESIG. ETM P/N DESCRIPTION QUANTITY U17545-000 DRIVER,OIL,DS75451N,DUAL AND,[NATIONAL 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,...

  • Page 55: Parts List, Hpa 40W 26.5-40Ghz (Ar) A28050-352

    Model 40T26G40A 5.3.5 Parts List, HPA 40W 26.5-40GHZ (AR) A28050-352 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A22826-352 HV POWER SUPPLY FOR MEC-5496 A23692-000 INSULATED FAN DRIVER A24830-001 EMERGENCY BYPASS BOARD A25444-000 HPA INTERFACE BOARD (PLASTIC FIBERS) A27742-001 LOW PROFILE CABINET ASSY, K AND KA-BAND...

  • Page 56: Parts List, Microwave Power Assembly, Ka, A28051-002

    Model 40T26G40A 5.3.6 Parts List, Microwave Power Assembly, KA, A28051-002 REF. DESIG. ETM P/N DESCRIPTION QUANTITY E00988-000 WR-28 TO COAX ADAPTOR, UG 599/U TO K, 2.9 MM WAVE GUIDE FEMALE, [APOLLO, 16064-1) E01149-000 WAVEGUIDE FLANGE GASKET, WR-28, [MDC # 68028-141] E01462-000 EQUALIZER, FIXED GAIN, 26.5-40 GHZ,M/F...

  • Page 57: Parts List, Wiring Kit, 40W K/Ka Band, 28052-000

    Model 40T26G40A 5.3.7 Parts List, Wiring Kit, 40W K/KA Band, 28052-000 REF. DESIG. ETM P/N DESCRIPTION QUANTITY E00765-000 P.S.,85-264VAC,47-440HZ TO 5VDC & 3.0A,(KEPCO FAW 5-3K/CA 24) E00850-000 AC FILTER,IEC INPUT,250V,7A,(FILTER CONCEPT LF7C) E01120-000 FAN, 11000 RPM, 400HZ, MODEL 1284DH, [AMETEK 010182 MODIFIED PER DRAWING]...
  • Page 58 Model 40T26G40A J18184-000 D-SUB,15 PIN MALE,CRIMP (ITT CANNON DAU-15P) J31011-000 D-SUB,37 PIN,MALE,CRIMP,5A,20 AWG (ITT CANNON DCU-37P) P7, P8 J31012-000 CONN,D-SUB,15 PIN,FEMALE,RIBBON CABLE,W/STRAIN RELIEF,PLASTIC,[AMPHENOL 841-17-DAFR- B15S] J31014-000 SPRING LATCH KIT,D-SUB,(AMPHENOL 17- 529) N22925-000 MODIFIED KNOB,1/4 SHAFT N24841-000 PANEL SWITCH SPACER S2, S3...

  • Page 59: Sample Program For Ieee-488 Communication

    Model 40T26G40A 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.
  • Page 60 Model 40T26G40A Rev A...
  • Page 61 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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