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AR 2000TP2G8B Operating And Service Manual

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Operating and
Service Manual
2000TP2G8B
Model
10013130
Part Number
Serial Number
160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.ar-worldwide.com

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Summary of Contents for AR 2000TP2G8B

  • Page 1 Operating and Service Manual 2000TP2G8B Model 10013130 Part Number Serial Number 160 School House Road, Souderton, PA 18964 • 215-723-8181 • Fax 215-723-5688 • www.ar-worldwide.com...
  • Page 3 160 School House Road Souderton, PA 18964 declare that our product; the Model 2000TP2G8B 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 INSTRUCTIONS FOR SAFE OPERATION BEFORE APPLYING POWER SAFETY SYMBOLS Review this manual and become familiar with all safety This symbol is marked on the equipment markings and instructions. when it is necessary for the user to refer to the manual for important safety information. Verify that the equipment line voltage selection is compatible with the main power source.
  • 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: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS ....................i DESCRIPTION AND SPECIFICATIONS ............1 TWTA Description ....................1 Suggested Applications ..................1 Specifications......................1 Accessories ......................1 Test Data Sheet ...................... 2 THEORY OF OPERATION ................7 Design of the Amplifier ..................7 Description of the RF Circuit (A27502-318) ............
  • Page 10 Model 2000TP2G8B 5.3.7 Parts List, HPA Wiring Kit, Single Phase 13PSC, A27507-913 ....47 5.3.8 Parts List, 200W SC External Filters, A30528-000 ........50 Recommended Spare Parts .................. 51 Sample Program for IEEE-488 Communication ..........52 APPENDIX, Application Note 35 FIGURES Mounting Support Holes ..................

  • Page 11: Description And Specifications

    This manual provides operating, interfacing and selected service information pertinent to AR RF/Microwave Instrumentation Model 2000TP2G8B Broadband Microwave Amplifier. The Model 2000TP2G8B is a 2,000 watt pulse only SC band traveling-wave tube amplifier (TWTA). TWTA DESCRIPTION The amplifier uses a broadband traveling-wave tube to provide a minimum of 2,000 watts peak pulsed output power over the amplifier's full bandwidth.

  • Page 12: Test Data Sheet

    Model 2000TP2G8B 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 -...
  • Page 13 2000 Watts Pulse 2.5-7.5GHz The Model 2000TP2G8B is a self contained, forced air cooled, broadband traveling wave tube (TWT) microwave amplifier designed for pulse applications at low to moderate duty factors where instantaneous bandwidth and high gain are required. A reliable TWT provides a conservative 2000 watts minimum peak RF pulse power at the amplifier output connector.
  • Page 14 SPECIFICATIONS POWER (fundamental), PEAK PULSE, @ OUTPUT CONNECTOR Nominal ..............2200 watts Minimum ............... 2000 watts FLATNESS ..............±13 dB maximum, equalized for ±4 dB maximum at rated power FREQUENCY RESPONSE ..........2.5–7.5 GHz instantaneously INPUT FOR RATED OUTPUT .......... 1.0 milliwatt maximum GAIN (at maximum setting) ...........
  • Page 15 (19.8 x 10 x 32 in). Add approximately 14 kg (30 lbs) 2000TP2G8B to weight of E2. 2000TP2G8B M1 Without outer enclosure, size 48.3 x 22.2 x 69 cm (19 x 2000TP2G8BM2 8.75 x 27 in). Weight approximately 39 kg (85 lbs).
  • Page 16 Rev -...

  • Page 17: Theory Of Operation

    2. THEORY OF OPERATION DESIGN OF THE AMPLIFIER The Model 2000TP2G8B TWT amplifier consists of three main parts, the microwave power assembly, the power supply, and the control. These will be described in greater detail below. The heart of the microprocessor control system is the control head assembly (A27509-301), which consists of the CPU board (A25450-000) and the data link board (A22488-013).

  • Page 18: Description Of The Power Supply (A22826-018)

    Model 2000TP2G8B Forward and reflected power monitoring, both peak reading and average reading, are designed for use when a CW RF input is present during the entire period of the pulses applied to the external pulse input. Amplifier gain is determined by the solid state pre-amp (SSPA), which has a voltage-controlled attenuator.

  • Page 19: Operation

    3. OPERATION 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 20: Mounting And Removing

    Model 2000TP2G8B 3.2.2 Mounting and removing The TWTA may be operated as a standalone benchtop unit, or it may be installed in a 19" rack. If rack mounting is desired, first remove the module from the cabinet, then install the module in the rack.

  • Page 21: Cooling Requirements

    Model 2000TP2G8B 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 intakes or outlets are blocked, or that the exhaust flow is directed into the intakes.

  • Page 22: External Interlock Connector

    Failure to comply with the specified TTL levels may result in modulator failure. Refer to AR RF/Microwave Instrumentation Application Note No.35 for additional information on use of pulse only TWT amplifiers. A copy of this application note is included as an appendix to this manual.

  • Page 23: Optional External Filter/Switch Connection

    Model 2000TP2G8B 3.2.8 Optional External Filter/Switch Connection When supplied with this TWTA, the optional external harmonic filter / switch assembly may be used to further reduce harmonic power in a sub-band. The TWTA output connects to the input of a two-position switch via a coax cable.

  • Page 24: Front Panel Features

    Model 2000TP2G8B FRONT PANEL FEATURES Refer to Figure 3-2 below. Figure 3-2. Front Panel Features Table 3-1. Front Panel Features Label Title Function Switchable 7.5 A. circuit breaker; turns on control module, closes contactor MAIN POWER providing AC to the power supply assemblies.

  • Page 25: Front Panel Display And Soft Keys

    Model 2000TP2G8B 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 26 Model 2000TP2G8B 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.
  • Page 27 Model 2000TP2G8B The Sleep Mode feature allows the user to selectively shut off the heater module of the power supplies. This can be done manually through the front panel or remotely via the computer interface. This is typically used during extended periods of remote operation to improve tube life, by turning off the filaments (Sleep Mode activated).
  • Page 28 Model 2000TP2G8B Event Screen - From MENU 5, 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 29: Rear Panel Features

    Model 2000TP2G8B REAR PANEL FEATURES See Figure 3-4 below. Figure 3-4. Rear Panel Features Table 3-2. TWTA Rear Panel Features Label Title Function 208 VAC IN AC power input cable IEEE-488 Remote control connector: 24-pin hermaphrodite Cooling air intake. Cooling air outlet.

  • Page 30: Initial Turn On And Warm-Up Procedure

    Model 2000TP2G8B INITIAL TURN ON AND WARM-UP PROCEDURE Operation is described without the external filter/switch assembly attached. Operation with the external filter/switch assembly attached is the same, except that the band selection must first be set to match the input RF frequency range, and the load is connected to the filter / switch assembly RF output connector.

  • Page 31: Remote Ieee-488 Operation

    Model 2000TP2G8B Allow the heater warm-up delay to expire. Line three will indicate OFF/READY. CAUTION: Do not allow the TWTA to remain in STANDBY for extended periods of time. If the TWTA will not be used in the OPERATE mode within an hour, shut the TWTA off.

  • Page 32: Catalog Of Ieee-488 Commands

    Model 2000TP2G8B Table 3-3. Catalog of IEEE-488 Commands Command Function Units Response format Returns status code of processing of previous command RDSTAT STATUS=[ ] (see Table 3-4) RDFLT Returns system fault code (see Table 3-5) flt=[ ] Emulates pressing the System ON button from System SYSTEM:ON;...
  • Page 33 Model 2000TP2G8B Command Function Units Response format RDPRDP Returns reverse power out (dBm) Peak Pr=[ ]dBm Pk RDPRWP Returns reverse power out (W) Peak watts Pr=[ ]W Pk RDPRD Returns reverse power out (dBm) Average Pr=[ ]dBm Avg RDPRW Returns reverse power out (W) Average...

  • Page 34: Catalog Of Status Codes

    Model 2000TP2G8B 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 Last command is in process.

  • Page 35: Catalog Of System State Codes

    Model 2000TP2G8B 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...

  • Page 36: Catalog Of Heater Auto Off Time Delay Codes

    Model 2000TP2G8B 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)

  • 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 RF/Microwave Instrumentation Service for additional assistance. (See Explanation of…, below)
  • Page 38 Model 2000TP2G8B Noise Power Density (NPD): TWTAs produce rf noise over their operating frequency range, as specified by the Noise Power Density (NPD). This noise is significantly higher than the noise produced by typical solid state amplifiers, and is inherent in present TWTAs. The noise may surprise users new to TWTAs when it accumulates and results in a significant indication in a broadband measurement device –...

  • Page 39: 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 Paragraph 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 40: Troubleshooting

    Model 2000TP2G8B 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. On the rear of the unit, remove any screws used to connect brackets to the amplifier.

  • Page 41: 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 42 Model 2000TP2G8B Rev -...

  • Page 43: Top Level Build Tree

    TOP LEVEL BUILD TREE A27500-913 HPA ASSY 23PSC, 2 KW PULSED 2.5-7.5 GHZ, IEEE-488 (AR) A22826-018 PULSED TWT P. SUPPLY (PFC) FOR TWT 3041B 1A1A1 A23280-000 HEAT SINK/MOTHER BOARD 1A1A2 A23687-001 LOW VOLTAGE POWER SUPPLY MODULE 1A1A3 A16485-000 HPA LOGIC AND CONTROL MODULE...
  • Page 44 Model 2000TP2G8B Rev -...

  • Page 45: Schematics

    Remote Control Board, Foldback only (A24830-000) 10-25444-001 HPA Interface (A25444-001) 10-30528-000 Harmonic Filter Switching Kit (Two filters) 10-30681-000 RF Switch Control Cable (Two switches) 10-30750-000 Pulse Monitor Board (A30750-000) 10-27500-913 1000W Pulsed TWT Amplifier, SC Band, AR (A27500-913) 4-35 REV -...
  • Page 46 Model 2000TP2G8B Rev -...

  • Page 47: Parts Lists

    PARTS LISTS A16485-000 HPA Logic and Control A22826-018 Pulsed TWT Power Supply A24830-000 Remote Control Board, Foldback A25444-001 HPA interface A27500-913 TWTA 2kW Pulsed SC Band A27502-318 Microwave Power Assembly A27507-913 Wiring Kit, 13PSC, Single Phase A30528-000 Harmonic Filter Switching Kit (Two filters) 4-37 REV -...

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

    Model 2000TP2G8B 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%...
  • Page 49 REF DESIG ETM P/N DESCRIPTION QUANTITY R21953-000 RES,9.53K,1/2W,1%,MF,100PPM,(DALE RN55D) 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...

  • Page 50: Parts List, Pulsed Twt Power Supply (Pfc), A22826-018

    Model 2000TP2G8B 5.3.2 Parts List, Pulsed TWT Power Supply (PFC), A22826-018 REF DESIG. ETM P/N DESCRIPTION QUANTITY A10010-000 HEATER POWER SUPPLY MODULE A16485-000 HPA LOGIC AND CONTROL MODULE A16487-382 POWER BOARD ASSEMBLY,PULSED TWTA A21425-020 HV DIODE/CAP MODULE FOR TWT 3041B...

  • Page 51: Parts List, Emergency Bypass Board, A24830-000

    5.3.3 Parts List, Emergency Bypass Board, A24830-000 REF. DESIG ETM P/N DESCRIPTION QUANTITY B24830-000 EMERGENCY BYPASS BOARD C30010-000 CAP,10MF,35V,TANT,RADIAL,(NEMCO TB10-35K1) C31040-000 CAP,1MF,50VDC,10%,CER,1% FAILURE,(KEMET CKR06 SERIES W/"V" OPTION) I2, I3 I10066-000 LED,RED,HIGH EFFICIENCY,HIGH BRIGHTNESS I10096-000 LED,GREEN,DIFFUSED,T1-3/4 (XC55G) J18180-000 CONN,D-SUB,15 PIN,MALE,STRAIGHT,PCB MOUNT (POSITRONIC MD15M3000) J31014-000 SPRING LATCH KIT,D-SUB,(AMPHENOL 17-529)

  • Page 52: Parts List, Hpa Interface Board 200Um Glass, A25444-001

    Model 2000TP2G8B 5.3.4 Parts List, HPA Interface Board 200UM Glass, A25444-001 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,(AVAX, TAP155K035SCS) C129, C163 C05223-000 CAP,2.2MF,35V,10%,SOLID SEALED...
  • Page 53 REF DESIG. ETM P/N DESCRIPTION QUANTITY J16213-000 TEST JACK,ORANGE,VERTICAL,(EF JOHNSON 105- 0856-001) J16214-000 TEST JACK,YELLOW,VERTICAL,(EF JOHNSON 105- 0857-001) J16215-000 TEST JACK,GREEN,VERTICAL,(EF JOHNSON 105- 0854-001) 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...
  • Page 54 Model 2000TP2G8B REF DESIG. ETM P/N DESCRIPTION QUANTITY 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) (SSD) U22598-000 IC,8 BIT ADDRESSABLE LATCH W/RESET,(74HC259) (SSD) U23909-000 IC,DUAL 4 BIT BINARY/BIQUINARY COUNTER...

  • Page 55: Parts List, Hpa Assy 13Psc, 1 Kw Pulsed 2-4 Ghz, A27500-913

    MICROWAVE POWER ASSY 2 - 4 GHZ PULSED A27507-913 HPA WIRING KIT, SINGLE PHASE 13PSC, GPIB A27509-301 HPA CONTROL CHASSIS ASSY, GPIB/LINK TRANSCEIVER BOARD, 200UM HCS FIBERS A30137-900 FRONT PANEL ASSY, 5U, FRONT PANEL MOUNT, GPIB (AR) A30750-000 PULSE MONITOR BOARD 4-45 REV -...

  • Page 56: Parts List, Microwave Power Assy 2 - 4 Ghz, A27502-318

    Model 2000TP2G8B 5.3.6 Parts List, Microwave Power Assy 2 - 4 GHZ, A27502-318 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A28357-000 UNIVERSAL SMA ADAPTER KIT 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-...

  • Page 57: Parts List, Hpa Wiring Kit, Single Phase 13Psc, A27507-913

    5.3.7 Parts List, HPA Wiring Kit, Single Phase 13PSC, A27507-913 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A30346-000 EMI MODIFICATION KIT FOR 400KU E01120-000 FAN, 11000 RPM, 400HZ, MODEL 1284DH, [AMETEK 010182 MODIFIED PER DRAWING] E20282-000 EMI LINE FILTER,(SAE POWER INC STD- H10066-000 CABLE TIE MOUNT #8 SCREW,(PANDUIT TA1S8-C)
  • Page 58 Model 2000TP2G8B REF. DESIG. ETM P/N DESCRIPTION QUANTITY J17102-000 BNC,BULKHEAD RECEPTACLE,GROUNDED,(AMPHENOL 31-221) A1J1, A1J2 J17250-000 BULKHEAD MT N-JACK TO SMA JACK ADAPTOR,[MIDISC0 XBNF-SF] J18012-000 CONN,FIBER OPTIC,GRAY,W/CRIMP RING,(HP HFBR-4501) J18013-000 CONN,FIBER OPTIC,BLUE,W/CRIMP RING,(HP HFBR-4511) J18054-000 CONTACT,FEMALE,HI PWR,20 AMP,UP TO 12AWG WIRE,[ITT CANNON DM53744-...
  • Page 59 REF. DESIG. ETM P/N DESCRIPTION QUANTITY W1, W2 W30020-000 CABLE,FIBER OPTIC,1000UM POF, [NISSHO|WAI AMERICAN CORP GH-4001] Z20020-000 FUSE,2A,250V,3AG,SB,(LITTELFUSE 313.002) Z31022-000 SURGE ARRESTOR,(CPCLARE AC240L) Z31024-000 TRANZORB, 440V, 1.5KE440CA (GI 1.5KE440CA) 4-49 REV -...

  • Page 60: Parts List, 200W Sc External Filters, A30528-000

    Model 2000TP2G8B 5.3.8 Parts List, 200W SC External Filters, A30528-000 REF. DESIG. ETM P/N DESCRIPTION QUANTITY A30681-000 CABLE, COAXIAL BANDSWITCH CONTROL E00999-000 SC BAND ABS. COAX HARM. FILTER, BP= 2.8- 4.8GHZ, BS=5.6-9.6 GHZ,250 WATTS CW MIN,[MDC 102000-152] E01022-000 SC BAND ABS. COAX HARM. FILTER, BP= 4.8- 8.0GHZ, BS=9.6-16.0 GHZ,250 WATTS CW...

  • Page 61: Recommended Spare Parts

    RECOMMENDED SPARE PARTS A10010-000 Heater Module A16487-382 Power Board Assembly A21425-020 Diode / Cap Assembly A21458-004 HV Filter A21458-005 Capacitor Bank A21459-020 PWM Board A23683-100 Power Factor Module A23684-101 Grid Modulator, Regulated Reference A23687-001 Low Voltage Power Supply Module A23692-000 Insulated Fan Driver E01035-000 External RF Switch (if optional harmonic filter switching assy is purchased)

  • Page 62: Sample Program For Ieee-488 Communication

    Model 2000TP2G8B 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 63 AR's pulse TWTAs are designed specifically for pulsed applications. They cannot be used to produce CW output. AR's TP series of pulse TWTAs do incorporate many of the excellent features of AR's T series of CW TWTAs such as: foldback protection, bright 4 line by 20 character alphanumeric display and extensive remote status and control via a GPIB (IEEE-488) interface.
  • Page 64 Delay, RF Rise and Fall time and the Pulse Input The beam is turned on and off in response to a TTL-level input (typically from an external Pulse Generator) applied to the Pulse Input Connector. A positive level (logical 1) turns on the beam. If RF had been applied to the TWTA input prior to the positive (logical 1) TTL input, the RF output would reach 90% of its final value within 300ns (Delay) with an observed RF Rise time of up to 30ns (10% to 90%).
  • Page 65 100 microseconds (1/10,000 sec.) following the beginning of the previous pulse. There is no minimum rate specification. Users should contact AR RF/Microwave Instrumentation regarding any specific requirements they may have for non-continuous pulse-stream applications with higher burst rates.
  • Page 66 Summary This Application Note has discussed some features of AR RF/Microwave Instrumentation's Pulse high power TWTAs and their unique specifications, those not commonly specified for CW rated amplifiers. A number of conditions have been defined which must be observed to obtain proper operation of these Pulse TWTAs (though TWTA design prevents damage when these conditions are exceeded).
  • Page 67 Immunity Generators, Signal Generators and Tripods will be free from defects in material and workmanship for a period of three (3) years from date of shipment shown on AR RF/Microwave Instrumentation invoice. Traveling Wave Tubes in the 200T2G8A, 250T1G3 and 250T8G18 will be free from defects in material and workmanship for a period of two (2) years from date of shipment.

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