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Model 20T4G18

REF. DESIG.

ETM P/N

DESCRIPTION

QUANTITY

U6, U19, U34, U39, U60

U20148-000

IC,HEX INVERTER,SCHMIDTT TRIGGER,(74HC14)
(SSD)

U42

U20730-000

IC,DUAL J-K FLIP FLOP W/RESET,(7473) (SSD)

U51

U21328-000

IC,QUAD 2 INPUT NAND,SCHMIDTT
TRIGGER,(74HC132) (SSD)

U52

U21388-000

IC,3 TO 8
DECODER/DEMULTIPLEXER,INVERTING,(74HC138)
(SSD)

U32

U21536-000

IC,DUAL 4 INPUT DIGTAL MULTIPLEXER,(74F153)
(SSD)

U35

U22598-000

IC,8 BIT ADDRESSABLE LATCH
W/RESET,(74HC259) (SSD)

U47

U23909-000

IC,DUAL 4 BIT BINARY/BIQUINARY COUNTER
(74HCT390) (SSD)

U41, U48

U24018-000

IC,JOHNSON DECADE COUNTER W/10 DECODED
OUTPUTS,(74HC4017) (SSD)

U45

U24138-000

IC,8 BIT BINARY DOWN COUNTER,(74HC40103)
(SSD)

U43

U26889-000

IC,8 BIT MAGNITUDE COMPARATOR,(74HCT688)
(SSD)

U22, U24, U57

U28008-000

IC,QUAD 2 INPUT AND,(74HC08) (SSD)

U4, U49, U58

U28032-000

IC,QUAD 2 INPUT OR,(74HC32) (SSD)

U44, U46

U28040-000

IC,12 BIT DECADE COUNTER,(74HCT4040) (SSD)

U5, U13, U14, U23, U25, U33,
U50

U28074-000

IC,DUAL D FLIP FLOP W/RESET,(74HC74) (SSD)

U28123-000

IC,DUAL RETRIGGERABLE 1-SHOT,(74HC123)
(SSD)

U31, U53

U28164-000

IC,8 BIT SERIAL IN PARALLEL OUT SHIFT
REGISTER,(74HC164) (SSD)

U3, U12, U28, U37, U38

U28165-000

IC,8 BIT PARALLEL IN SERIAL OUT SHIFT
REGISTER,(74HC165) (SSD)

RP6

U32001-000

IC,1K FEED-THROUGH RES NETWORK,16 PIN
DIP,(A/B 316B102)

RP1-RP5

U32103-000

IC,10K FEED-THROUGH RES NETWORK,16 PIN
DIP,(A/B 316B103)

U56

U40008-000

REGULATOR,OIL,5V,100MA,TO-92,[MOTOROLA
MC78L05ABP]

U55

U40012-000

FLIP-FLOP,OCTAL D-TYPE LATCH WITH
RESET,[NATIONAL MM74HC273N]

Rev B

http://www.Datasheet4U.com

Содержание 200T4G18

Страница 1: ...Operating and Service Manual 20T4G18 Model 1008254 501 Part Number Serial Number http www Datasheet4U com...

Страница 2: ...Model 20T4G18 2 http www Datasheet4U com...

Страница 3: ...ective 89 336 EEC and Low Voltage Directive 73 23 EEC in accordance with the relative standards listed below EMC EN 50082 1 1992 Electromagnetic compatibility Generic immunity standard EN 50081 1 1992...

Страница 4: ...Model 20T4G18 4 http www Datasheet4U com...

Страница 5: ...RF output connector can be hazardous The RF output connector should be connected to a load before AC power is applied to the amplifier Do not come into contact with the center pin of the RF output co...

Страница 6: ...Model 20T4G18 2 http www Datasheet4U com...

Страница 7: ...the machine may have been made use this information only as a guide Carefully compare the unit s actual configuration and operation to the descriptions in this manual before you undertake to operate s...

Страница 8: ...Model 20T4G18 4 http www Datasheet4U com...

Страница 9: ...l Display and Soft Keys 12 3 5 Rear Panel Features 16 3 6 Initial Turn On and Warm up Procedure 16 3 7 Emergency Bypass Operation 17 3 8 Remote IEEE 488 Operation 18 3 9 TWTA General Considerations 23...

Страница 10: ...Figure 3 2 TWTA Front Panel Features 11 Figure 3 3 Front Panel Display Screens 12 Figure 3 4 TWTA Rear Panel Features 15 TABLES Table 1 Front Panel Features 9 Table 2 Rear Panel Features 15 Table 3 Ca...

Страница 11: ...ifier is supplied in an enclosure with integral carrying handles Primary power is 99 260 volts 50 60 Hz single phase An efficient switching power supply design provides minimum power consumption A fas...

Страница 12: ...Model 20T4G18 1 5 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 2 Rev B http www Datasheet4U com...

Страница 13: ...ing and remote Standard features include a built in IEEE 488 GPIB interface 0dBm input VSWR protection gain control RF output sample port auto sleep plus monitoring of TWT helix current cathode voltag...

Страница 14: ...OWER DENSITY Minus 80 dBm Hz maximum Minus 90 dBm Hz typical HARMONIC DISTORTION at 20 watts 4 2 4 5GHz Minus 0dBc maximum Minus 1dBc typical 4 5 5GHz Minus 1dBc maximum Minus 2dBc typical 5 7GHz Minu...

Страница 15: ...reamp assembly with adjustable gain E01122 000 and a traveling wave tube amplifier E08137 000 The type N RF input connector is located on the rear panel The RF input is fed to the input connector on t...

Страница 16: ...low voltage power supply module A23687 001 In addition this module provides DC power for the HPA interface and emergency bypass boards Control logic and TWT protection circuits are contained in the HP...

Страница 17: ...ave tube amplifiers in general and with this equipment in particular Never handle the TWT leads or the high voltage connectors unless the unit has been unplugged and it has been positively established...

Страница 18: ...to the weight of the unit the removal of the amplifier from the cabinet or rack is a two person operation Before removal disconnect power RF and any other interface connectors On the rear of the unit...

Страница 19: ...t 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...

Страница 20: ...ator load should be provided with a temperature sensing switch The temperature switch should be normally closed self resetting and with a temperature rating such that there is no possibility of damagi...

Страница 21: ...STANDBY Push button shuts off SSA and turns off high voltage 4 ADJUST Rotary knob used as an input device to change values of a variety of parameters 5 EXIT Push button terminates various menu selecti...

Страница 22: ...is displayed on the bottom line of the display Figure 3 3 provides a roadmap for navigating between the screens Figure 3 3 Front Panel Display Screens Menu screens The screens at the highest level are...

Страница 23: ...isplayed when the screen is exited will be retained Pressing MORE again brings up the SETUP 4 screen which allows a choice of displaying forward power in watts dBm or bar graph Pressing MORE a third t...

Страница 24: ...T collector block temperature If either parameter exceeds the setpoint the audible alarm will sound every 30 seconds if configured and a warning message will appear on line 3 of MENU 1 From WARNINGS 5...

Страница 25: ...ndicate a malfunction of the TWTA System malfunction messages include the following Database corrupt Communication failure Cannot restore CU line voltage too low to operate System shutdown In the even...

Страница 26: ...iscussed 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 100 w...

Страница 27: ...to minimum set the RF generator to 0 dBm and then slowly increase the TWTA gain to set the desired RF output level Observe that the helix current is sensitive to the RF drive level of the TWT It is at...

Страница 28: ...urns serial number s n RDCONHR Returns console hours ConHr RDRFHR Returns RF hours RfHr RDEK Returns cathode voltage KV Ek RDEB Returns collector voltage KV Eb RDEF Returns heater voltage V Ef RDIF Re...

Страница 29: ...Sets over forward power warning setpoint W watts RDPOLOW Returns under forward power warning setpoint W watts Polo W SPOLOW Sets under forward power warning setpoint W watts RDPRHID Returns over rever...

Страница 30: ...em is not ready to accept commands 60 Command is not allowed in current system state 901 Assert error invalid table argument 902 Assert error invalid calibration Please call a service representative i...

Страница 31: ...pired 5 Under forward power warning 6 Foldback active 7 MSB Inhibit mode x bit Meaning 8 LSB External inhibit 9 Interlock open 10 not used 11 MSB not used w bit Meaning 12 LSB not used 13 Sleep Mode A...

Страница 32: ...ay 5 3 0 hour heater auto off time delay Command syntax is in this form command mnemonic parameter carriage return where command mnemonic consists of one of any valid command found in Table 3 paramete...

Страница 33: ...voltage and grid on but no RF drive Such operation for about one hour on a weekly basis should effectively reduce nuisance tripping Since the cathode structure has finite life extended periods of non...

Страница 34: ...the structure of the tube can be released thus corrupting the vacuum of the tube If the tube become too gassy arcing may occur when the high voltage is fully applied in the Operate mode Another possi...

Страница 35: ...a known safe level CAUTION A malfunctioning power supply can cause damage to the TWT If you are troubleshooting the TWTA remove the TWT and substitute suitable loads to prevent damage to the TWT 4 2...

Страница 36: ...y overtemperature Air inlet filter dirty Collector heat sink dirty Inadequate clearance behind TWTA High air inlet temperature Defective blower or power supply No response when main power turned on Pa...

Страница 37: ...sed on the failure symptom and an understanding of the logic schematic diagrams 4 5 NON REPAIRABLE MODULES The High Voltage Diode Cap Assembly A21455 100 the High Voltage Filter Assembly A21454 and th...

Страница 38: ...Model 20T4G18 28 Rev B http www Datasheet4U com...

Страница 39: ...ng 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 t...

Страница 40: ...D WOUND 1A1A6 A21455 100 HIGH VOLTAGE DIODE CAP ASSY FOR 100WKU A09484 000 HV XFMR FOR TWT 5181KU 1A1A7 A21457 001 HV FILTER MODULE 1A1A8 A10017 100 PWM BOARD SPECIAL 1A1A9 A10010 000 HEATER POWER SUP...

Страница 41: ...000 HPA Logic and Control A16485 000 10 25444 000 HPA Interface A22444 000 10 24830 Emergency Bypass Board A24830 001 10 24830 002 Emergency Bypass Board A24830 002 10 28825 300 HPA 20T Series A28825...

Страница 42: ...Model 20T4G18 32 Rev B http www Datasheet4U com...

Страница 43: ...Model 20T4G18 5 3 WIRING DIAGRAMS 20 23720 099 TWT Power Supply AR 20T Series A23720 099 Rev B 33 http www Datasheet4U com...

Страница 44: ...Model 20T4G18 34 Rev B http www Datasheet4U com...

Страница 45: ...Assembly A23720 099 Power Supply Short for TWT 5172 A24830 001 Emergency bypass board A24830 002 Emergency bypass board A25444 000 HPA Interface Board Plastic A28825 300 HPA 20W 4 2 18GHZ AR A28826 0...

Страница 46: ...N 37 PIN MALE D SUB PCB RIGHT ANGLE AMP 747252 4 1 J18075 000 MALE SCREW LOCK FOR D SUBMIN CONN AMP 205817 1 1 J4 J5 J18086 000 CONN SMA JACK RECEPTACLE RIGHT ANGLE 0 18GHZ PC MOUNT JOHNSON COMPONENTS...

Страница 47: ...ALE RN55D 1 R12 R15 R32020 000 TRIMPOT 10K 1 2W 10 CERMET 20T SIDE ADJ BECKMAN 67X 2 U4 U5 U6 U02390 000 IC QUAD COMPARATOR NAT LM139J 3 U7 U03240 000 IC LOW POWER OP AMP NAT LM324 1 U9 U10070 000 REF...

Страница 48: ...IAL 1 A3 A16485 000 HPA LOGIC AND CONTROL MODULE 1 A6 A21455 100 HIGH VOLTAGE DIODE CAP ASSY FOR 100WKU 1 A7 A21457 001 HV FILTER MODULE 1 A4 A23683 100 POWER FACTOR MODULE 500W 1 A2 A23687 001 LOW VO...

Страница 49: ...1 J1 J18180 000 CONN D SUB 15 PIN MALE STRAIGHT PCB MOUNT POSITRONIC MD15M3000 1 Q1 Q3 Q22222 000 TRANSISTOR NPN 2N2222A TO 18 3 Q4 Q5 Q22907 000 TRANSISTOR PNP 2N2907A TO 18 2 R18 R23 R01100 000 RES...

Страница 50: ...56 001 1 J2 J18086 000 CONN SMA JACK RECEPTACLE RIGHT ANGLE 0 18GHZ PC MOUNT JOHNSON COMPONENTS 142 0701 301 1 J1 J31055 000 CONN D SUB 15 PIN FEMALE STRAIGHT PCB MOUNT AMPHENOL 17D A15S U 1 Q4 Q5 Q22...

Страница 51: ...0 71 73 77 79 83 85 87 88 89 91 94 96 97 98 102 C31036 000 CAP 0 1MF 100VDC 10 CER 1 FAILURE KEMET CKR06 SERIES W V OPTION 61 C12 C14 C21 C27 C29 C31 C34 C36 C38 C17 C18 C19 C37 C54 C55 C56 C57 C58 C5...

Страница 52: ...0071 000 TRIMPOT 10K 1 2W 10 CERMET 100PPM 20T TOP ADJ BECKMAN 67W 2 R9 R12 R15 R22 R35 R36 R40 R44 R30103 000 RES 10K 1 8W 1 MF AXIAL 100PPM DALE CMF 50 RN50C1002F 9 R17 R19 R20 R21 R23 R25 R28 R31 R...

Страница 53: ...U43 U26889 000 IC 8 BIT MAGNITUDE COMPARATOR 74HCT688 SSD 1 U22 U24 U57 U28008 000 IC QUAD 2 INPUT AND 74HC08 SSD 3 U4 U49 U58 U28032 000 IC QUAD 2 INPUT OR 74HC32 SSD 3 U44 U46 U28040 000 IC 12 BIT D...

Страница 54: ...2 1 A5 A24830 001 EMERGENCY BYPASS BOARD 1 A11 A24830 002 EMERGENCY BYPASS BOARD 1 A3 A25403 302 TWTA CONTROL ASSY 20 CIJ 50X 1 A4 A25444 000 HPA INTERFACE BOARD PLASTIC FIBERS 1 A12 A25498 000 WIRING...

Страница 55: ...IN WITH 35DB VGA CPI CMA40180A XX 1 A2 E08137 000 TWT 4 18 GHZ 25 WATTS CPI VTM 6196R5 1 R1 E20012 000 ATTENUATOR 6DB SMA 2W SUB MINIATURE INMET 18A 6 1 R2 E20064 000 ATTENUATOR 3DB 2W DC 18GHZ MINITU...

Страница 56: ...supply module low voltage power supply A21455 100 High voltage diode cap assembly A21454 000 High voltage filter assembly A10010 000 Heater power supply module Y10057 000 Spinnaker DC blower Comair R...

Страница 57: ...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 THEN 1130 1080 OUTPUT 701 A 1090 IF A 1 2 RD THEN GOTO 1060 1095 IF A 1 1 THEN...

Страница 58: ...Model 20T4G18 48 Rev B http www Datasheet4U com...

Страница 59: ...hall be to repair or replace any goods which do not conform to the foregoing warranties or at seller s option to give buyer credit for defective goods The warranty is valid only when used in the count...

Страница 60: ...http www Datasheet4U com...

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