Tektronix 7a11 Скачать руководство пользователя страница 42

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Содержание 7a11

Страница 1: ...INSTRUCTION MANUAL Serial Number a727 Tektronix Inc S W Millikan Way P 0 Box 500 Beaverton Oregon 97005 Phone 644 0161 Cables Tektronix 070 0984 00 1269...

Страница 2: ...follows 1 Typed text pages are typically scanned in black and white at 300 dpi 2 Photo pages are typicallyscanned in gray scale mode at 600 dpi 3 Schematic diagram pages are typically scanned in black...

Страница 3: ......

Страница 4: ...OFFSET OUT 50 SZ TerminationIAdapter Environmental Probe Temperature Altitude Vibration Shock Plug In Altitude Physical Finish Dimension Weight SECTION 2 OPERATING INSTRUCTIONS General Plug In Inserti...

Страница 5: ...Checks Recalibration Troubleshooting Test Equipment General Techniques Troubleshooting Basic Components TroubleshootingChart Corrective Maintenance Parts Procurement Screwdriver Requirements Soldering...

Страница 6: ...L PARTS LIST MechanicalParts List Information CHANGE INFORMATION Abbreviations and symbols used in this manual are based on or taken directly from IEEE Standard 260 Standard Symbols for Units MIL STD...

Страница 7: ...Fig 1 1 7A11 Amplifier 8...

Страница 8: ...ther reduced by inserting a 2X attenuator in the signal path ahead of the 50 St terminationladapter Approx imate values of VSWR which can be expected under both conditionsare shown in Fig 1 4 The perf...

Страница 9: ...Approximately 2 0pF 0 25nA or less at 2 5 increasing to 1 2nA or less at 5 0 0 1 division maximum measured in 7000 SeriesOscilloscope Characteristic DC Drift Drift With Time Ambient Temper ature and L...

Страница 10: ...W Frequency lo MHz Power Rating ENVIRONMENTAL 1 Watt Probe Temperature Non operating Operating Altitude I Operating Non operating Vibration To 50 000feet To 15 000feet l5 minutes alongeach axis at 0 0...

Страница 11: ...1 4 VSWR 1 3 1 o 1 MHz 10 MHz 100 MHz FREQUENCY 1 GHz ArtekMedia Digitally signed by ArtekMedia DN cn ArtekMedia o ArtekMedia com ou email manuals ArtekMedia com c US Date 2008 11 16 13 33 28 06 00...

Страница 12: ...at any resonant point or if none at 55 C I S 400 g s 112 sine 3 shocks along each axis at 112 ms 1 ms and 2 ms duration total of 27 shocks To 50 000 feet and 5 5 Anodized aluminum front panel Characte...

Страница 13: ...NOTES...

Страница 14: ...this latch depressed move the Adapter out through the front of the 7Al1 as in Fig 2 2 B Uncoil the desired number of turns of cable from the cable drum and remove the Probe through the Adapter access...

Страница 15: ...as specified for 7 A l I oscilloscopecombination Reduces upper frequency 3 dB limit of 7 A l I oscilloscope to 20 MHz Full bandwidth is provided if both switches are in the outward position Externall...

Страница 16: ...Operating Instructions 7ATl Adapter Adapter install ring Stored Probe Inpc tAdapter Note that Probe hasI d cable men diseng i aged from Adapter nded Fig 2 2 Probe storageand removal 8...

Страница 17: ...e equipped with pincher tip or hook tip for attaching Probe to cir cuitry Maximum allowable DC peak AC input is 200 volts Consult specification section for derating Ground Contact due to frequency Dep...

Страница 18: ...ween grounding female thread at Retractable Hook Tip and alli gator clip 9 Alligator Clips For use with grounding leads 10 50 52 TerminationIAdapter GR to probe tip Can be used in any situation requir...

Страница 19: ...kHz selected at the Cali brator and IVOLTSIDIV selected at the 7A11 a display of approximately 4 divisions appears on the CRT Adjusting the GAlN control with the oscilloscope Cali brator signal appli...

Страница 20: ...the upper half of the CRT 5 Disconnect the Probe from the jack Attach the AC Coupler accessory to the Probe tip Connect the Coupler tip to the Calibrator jack and note that the 4 division square wave...

Страница 21: ...in the adds 1 pF and the STORED PROBE INPUT Adapter adds 5 through 50 mV positions input capacitance is 5 8 pF In 1 2 pF Any additional devices such a s connectorsor cables the l through 1 V position...

Страница 22: ...Output Amplifier where it is amplified and sent through the interconnecting plug to the oscilloscope The Output Amplifier also provides a push pull trigger signal to the oscilloscope for time base tr...

Страница 23: ...nergized its contact drops to the lower position This places R12 in series be tween the probe tip and R21 At the same time it places the R 13 C13 R15 C15 R16 C16 combination in parallel with R21 The n...

Страница 24: ...of the DC voltage component of the incoming signal for use in boot strappingthe Probe power supplies A detailed description of this boot strapping feature is con tained in the power supply circuit des...

Страница 25: ...ource to drainor drain to sourcecurrent flow can occur in Q198 depending upon the instantaneous polarity of push pullsignals The STEP ATTEN BAL circuit is capable of applying a small voltage at the ba...

Страница 26: ...tioning signal A voltage equal but opposite to that appearing at the I33124314 junction is generated by the Offset Inverter and is applied to R49 in the Probe The sum of R317 R44 R45 R46 and R47 is ap...

Страница 27: ...any given switch position For example the switch is shown in the 5 mV position Dots in the 5 mV row indicatethat the switch contacts associated with cams 1 3 5 6 7 9 and 10 are closed All other cam o...

Страница 28: ...Power Supply and Output Connectors schematic diagram The Power Supplies contained in the Type 7A11 are conventional series regulating types The plus and minus 7 volt supplies may be considered as an e...

Страница 29: ...NOTES...

Страница 30: ...should be deter mined as a part of preventive maintenance for several reasons 1 the performance of an instrument changes slightly with age use and operating conditions 2 perfor mance may be affected...

Страница 31: ...this is power supply trouble which causes symptoms to occur in other wise unrelated circuits Visual Inspection In visually examiningthe equipment take special note of the area localized by evaluation...

Страница 32: ...I f the device is con ducting voltage will be developed across resistances in series with it if it is open no voltage will be developed across resistances in series with it unless current is being sup...

Страница 33: ...ilm and wire wound resistors are used Replacement resistors should be of the same type and must be at least as accurate as those originally contained in the circuit to maintain the performance standar...

Страница 34: ...ugh Tektronix Field Offices or Representatives How ever replacements for standard electronic items can be readily obtained from local electronic parts stores When selecting replacement parts it is imp...

Страница 35: ...A l l setup after 1 minute hori Polarity at 7 A l l trace mover and K431 zontal trace is visible from bottom to top a from top to bottom YES Check that the Offset is OFF doer tram move in response to...

Страница 36: ...O l o I v F NO ID trace shift when witched to 50 mvf YES YES 1 I A Display much Switch Otcil 1 p e Cali lorcope Csli brator to 4 Ns brator to Ng V 4 div V display ap a p p Fig 4 3 Troubleshooting Char...

Страница 37: ...will usually aid in heat trans fer on difficult connections This will decrease heating of the general area Use the extreme tip of needle nosedpliers to avoid drawing off too much heat When connecting...

Страница 38: ...ws freely After removing the iron hold the component steady until the solder is firm Clip any excess wire Clean the solder area with a cotton tipped swab and flux remover 1 Except for troubleshooting...

Страница 39: ...s should be avoided Use a screw driver which has a small diameter handle and use very light torque Plug In Unit Data Pin Connectors Pin connectors should not be subjected to excessive pressure repeate...

Страница 40: ...ention to alignment and spacing It is recommended that repairs be done by a Tektronix Repair Center In repairing defective switches a repair kit and a skilled technician are necessary ingredients The...

Страница 41: ...reviously described 2 Remove the two screws which remain in the rear plastic connector guide 3 Remove all pin connectors and cable clamps pushing the cable clamps out from the back of the board 8 Unso...

Страница 42: ...Fig 4 8 Test Point locations within Plug In Unit Fig 4 9 Transistor and integrated circuitplacement within Plug In Unit 4 13...

Страница 43: ...Fig 4 10 Component locations on Plug In Unit circuit board transistor side...

Страница 44: ...t locations on Plug In Unit circuit board reverse side Blk vio on G Red o 1 H Re I wht n wht A n uht 3ed on whl J Blu 4 AD E A I red on wl AP Blk vio on w Fig 4 12 Wire color codes for Plug In Unit ci...

Страница 45: ...NOTES s...

Страница 46: ...pur poses in which case it should be duplicated to permit re taining an unmarked original copy form calibration procedure by technicians familiar with calibratingthe 7A11 Equipment Required Table 5 1l...

Страница 47: ...Performance CheckICalibration 7A11 Fig 5 1 Test equi ment required See Table 5 1 8...

Страница 48: ...No 067 0589 00 l1 IStored Probe Input Adapter Removable com ponent of 7A11 Amplifier l2 1TerminatiordAdapter 50 a GR to Probe Tip 7A11 Amplifier standard accessory AC Coupler 7A11 Amplifier standard...

Страница 49: ...2 CheckIAdjust Transient Response Page 5 14 Adjust C134 R255 C255 C203 C245 C261 C234 at 10 mV for transient response within f2 using 5 division display of Fast Rise square wave from Type 106 Square W...

Страница 50: ...put amplitude 19 Check Trigger Circuit Transient Re sponse Page 5 25 At 50 mV with Type 106Square Wave Generator Fast Rise signal applied check for abberrationswithin 6 10 peak to peak 20 Check Trigge...

Страница 51: ...only Remove the left side POLARITY cover from the 7000 SeriesOscilloscope and from the 7A11 BANDWIDTH 20 MHz Amplifier VOLTSIDIV c Remove the Probe and Stored Probe Input Adapter from the 7A11 7B Seri...

Страница 52: ...0 0 3 5 V None affected by Step 2 1 c ADJUS1 8 7 V 1 UST R500 ar AD If out of allowable toler 4 JUST R540 rig 5 4 as necessary to have me app cable a 1 perform Step 2 and 2 power supplies within allow...

Страница 53: ...tain minimum trace shift 9 Select UP Polarity at the 7Al I 4 Usingthe front panel OSITIONcontrol set trace to graticule center 5 CHECK knob index should be within approxi mately 10 of top center 6 ADJ...

Страница 54: ...uld not exceed 05 division peak to peak g Calibration Procedure only ADJUST R211 and R345 Fig 5 41 for optimum square corner and flatness Rounding overshoot and tilt should not exceed 05 division peak...

Страница 55: ...explained in the MaintenanceSection CAUTION Do not remove or replace the shield with the 7A11 energized An accidental short circuit may occur Be careful while working with the dis ssembled Probe to av...

Страница 56: ...least 2 5 times the indicated value NOTE The 7AI 1 gain can be calibrated with any reliable source 7000 Series Oscilloscopes are equipped with calibrators which are accurate to within 1 The A mplitud...

Страница 57: ...rnally to amplifier with VOLTSIDIV switch in any of the 5 mV through 50 mV positions NOTE Y tJ7 Either the Amplitude Calibrator And Comparator accurate to within 0 25 or the 7000 SeriesOscillo scope C...

Страница 58: ...o the Probe and note accompanying trace a Control settings given in Table 5 2 apply Equipment shift Trace shift should be within 0 05 division indicating required for step 11 is shown in Fig 5 9 0 25...

Страница 59: ...use of the wide bandwidth of the 7A11 a com peak to peakdisplay plete check of transient response is made using a combination of methods sampling and real time in steps 12 13 and 1 12 is ysed to check...

Страница 60: ...an be accomplished as follows Fully Clockwise Source Adjusted for well defined trace 1 Select Chan A mode Ext 2 Set the Chennel A mVolts1Div switch to 200 and center the Position control Switch the mV...

Страница 61: ...onnector on the left and on the right side Connect the left and right side male connector to the Channel A and B inputs of the 3S1 respectively using 2 ns cables item 17 and GR to BNC female adapters...

Страница 62: ...13 Note the shape of the top left corner of the put ill be used as a reference...

Страница 63: ...5 mV 20 mV and 50 mV Use a 10X Attenuator at 5 mV 5X Attenuator at 20 mV and no attenuator at 50 mV I Performance Check only Move the Probe and 50 C l TerminationIAdapter to the Hi Amplitude Output o...

Страница 64: ...onnect the Probe 50 2 TerminationIAdapter and 5X GR Attenuator to the Hi Amplitude Output connector of the Square Wave Generator e Adjust the Square Wave Generator Amplitude control as necessary to ob...

Страница 65: ......

Страница 66: ...BNC male connector to Channel A and its lower right BNC male con nector to Channel B of the 3S1 Check that the Sampling System controls remain set up a s in Table 5 5 and check that a coaxial cable r...

Страница 67: ...ate to 500 ps Adjust the Type 106 Square Wave Generator to obtain a 5 division display and measure the risetime between the 10 and 90 amplitude points Determine the 7A11 rise time from Fig 5 18 Remove...

Страница 68: ...PerformanceCheckICalibration 7A11 I Fig 5 18 7 A l l riratime computation chart...

Страница 69: ...ctor to the 3S1 Channel A Input throu nnect the B13 connector to the Channel Set the Sampling System trace accurately to gratic Do not move th...

Страница 70: ...sconnect the Probe Termination and 10X Attenua to peak tor from the Type 106 Square Wave Generator a The setup is continued from steps 15 through 18 A 21 Check Trigger Circuit Frequency Response squar...

Страница 71: ...t should be set up according to step 12 b and 12 12 b Within the Plug In Extender disconnect the bottom BNC connectorson both sides c Attach the left side connector A1I to Channel A of the 3S1 using t...

Страница 72: ...c PMC PO Y prec PT metal mounting hardware outside diameter oval head brass oval head steel part of pan head brass pan head steel plastic paper metal cased polystyrene precision paper tubular PTM pape...

Страница 73: ...ng information in your order Part number instrument type or number serial or model number and modification number if applicable If a part you have ordered has been replaced with a new or improved part...

Страница 74: ...RICAL PARTS LIST Title Page No 7 A l l PROBE 6 1 CHASSIS 6 2 ATTEN MAIN AMP Circuit Board Assembly 6 3 OFFSET Circuit Board Assembly 6 11 POLARITY Circuit Board Assembly 6 11 BANDWIDTH Circuit Board A...

Страница 75: ...00 8039999 1 3pF Var Cer C6 281 0122 00 B040000 2 5 9 pF Var Cer C13 281 0151 00 BOl0100 8039999 1 3pF Var Cer C13 281 0122 00 8040000 2 5 9 pF Var Cer C15 283 0160 00 1 5 pF Cer 50 V C16 283 0202 00...

Страница 76: ...se indicated a w 5 10 a w 5 Selected matched pair Selected matched pair Thermal 1 20 W Prec a w 1 20 W Prec 1120W Prec a w 1 2 k n 220 n 464 20 n 200 n Var a w a W Prec CHASSIS Capacitors Tolerance 20...

Страница 77: ...00 56 n w 311 0095 00 500R Var 311 0652 00 BOl0100 0049999 2 x 5 kn Var 311 0652 01 8050000 2 x 5 kR Var 311 0955 00 2 kn Var Switches Wired or Unwired Tmnsfonner 120 0644 00 5 turns twisted bifilar...

Страница 78: ...Cer 500 V 0 005 pF Cer 500 V 283 0003 00 0 01 pF Cer 150V 283 0001 00 0 005 pF Cer 500 V 283 0001 00 0 005 pF Cer 500 V 290 0177 00 8010100 8079999 1 PF Elect 50 V 290 0420 00 8080000 B089999 0 68 LF...

Страница 79: ...licon Silicon Silicon Silicon Transistors Silicon Silicon Silicon Silicon 1N4372A 400 rnW 3 V 5 1N751A 400rnW 5 1V 5 1N751A 400 mW 5 1 V 5 1N751A 400 mW 5 1 V 5 Replaceable by 1N4152 Replaceable by 1N...

Страница 80: ...w 315 0473 00 47 kQ 14 w 311 1004 00 20 kQ Var 315 0103 00 10 kQ 14 w Tek Spec Tek Spec Selected from MM4049 2N4261 Selected from MM4049 2N4261 Tek Spec Tek Spec High frequency High frequency Selected...

Страница 81: ...Prec 321 0093 01 8080000 90 9s2 I S w Prec 321 0821 00 2 12kc a w Prec 321 0782 03 400 a w Prec 321 0782 03 40a a w Prec 322 0633 00 2 304kn aw Prec 3 17 01 03 00 8010100 8069999 10kn aw 3 15 01 03 00...

Страница 82: ...w 321 0094 00 93 1 325 0051 03 18 2 317 0101 00 8010100 8069999 loon 315 0101 00 8070000 100 R 311 0534 00 500 a Var la W Prec IS w 14 w Prec Prec lla w 1 20 W Prec la w Prec IS w Prec 14 w 1 20 W Pre...

Страница 83: ...w 100 k n I4 w 20 n 14 W 20 n I4 w 1 1 kQ I S w Prec 4 99 k n a w Prec 311 0496 00 0010100 8069999 2 5 kn Var 311 1226 00 8070000 2 5 kn Var 321 0168 00 549 0 I S w Prec 321 0684 00 15 k n I S w Prec...

Страница 84: ...75 k n 75 kQ 8010100 8069999 10 kn Var 8070000 10 kn Var 8 2 k n 523 976 i2 150n l o n 21 5 kn 3 57 k n 3 6 kn 150n l on 1k n 475 n 523 0 180 6 8 0 270 2 3 57 k n 21 5 k n 3 6 kn 150n 10n 1 k n 801010...

Страница 85: ...a r d 670 1 1 1 0 01 B 0 7 0 0 0 0 Complete B o a r d Bulb DS430 150 0057 01 BOl0100 8069999 Incandescent 7153AS15 selected DS430 150 0048 01 B070000 Incandescent 683 selected Switch Wired or Unwired...

Страница 86: ...oted otherwise POLARITY UP BANDWIDTH 20 MHz STEP ATTEN BAL Adjusted for no trace shift accompanying switching between UP and INVERT VOLTSfDIV 10 mV for voltages 50 mV for waveforms VARIABLE CAL Voltag...

Страница 87: ...7 A l l AMPLIFIER T h B O A R D GROUND CONNECTED TO C A S E GROUND THRU M O U N T I N G SCREW C O N T A C T S N O T E i S E E P A R T S L I S T F v n SEMICONDUCTOR TYPES...

Страница 88: ...T F U K R TYPES...

Страница 89: ...commonly vansr tO 1 V depsndent upon indi vidual tranirtw belw usd for 023...

Страница 90: ...FOR ZI CONDULTOR TYPES REFERENCE D AGRAMS PROBE OUTPUT AMPL F E R OFFSET GENERATOR VOLTS D V SWITLH Q READOUT SEE PARTS LIST FOR EARLIER VALUES A N D SERIAL NUMBER RANGES OF PARTS MARKED WllH BLUE OUl...

Страница 91: ...7 A l l AMPLIFIER p r F r n a u c h D I A G iNPUT AMPLIFIER S L L P A R T S L15T SLM CONDUCTOR SEE PAWS US1 FOR VAUlES AND S B I U RANGES OF PARIS I WllH BLUE W T L l N E...

Страница 92: ......

Страница 93: ...OFFSET ON Md adjusted f a 0 V at R307 R308 pncfion IVOLTAGES WAVEFORMS oMuMd unda mndanmp vmm l dwRm S E E PARTS UST FOR EARLIER VALUES AND SERIN NUMBER RANGES OF PARTS MARKED WITH B L U E OUnlNE...

Страница 94: ...N O T E S i S E E P A R T S L I S T F O R I C e S E M I C O N D U C T O R T Y P E S 2 U 3 2 4 k U345 PINS 1 5 e 8 N O T CONNECTED PROBE SEE 1 R E F E R E N C E DIAGRAMS P R O B E I N P U T A M P L I...

Страница 95: ...2 LL 7A11 AMPLIFIER...

Страница 96: ......

Страница 97: ...VOLTAGES obtained unda conditions ban T I 6 VOLTS OIV I 5 E L PARTS L15T F O R 5 4 4 0 SEMICONDUCTOR T Y P E 5...

Страница 98: ......

Страница 99: ...capacitor TIP retractable hook TIP hook TUBE insulating plastic ADAPTER bayonet ground LEAD ground 3 inches long LEA D ground 3 inches long threaded LEAD ground 12 inches long CLIP alligator TERMINATI...

Страница 100: ...mnditionrgiven on dlwm 7 A l I AMPLIFIER...

Страница 101: ...C H I COLUMN READOUT X i O X i 0 0 T R I G G E R SIGNAL F R O T O J 4 3 0 6 POWER SUPPLY 6 OUTPUT CONNEC...

Страница 102: ...MBLY Part No 065 0125 00 Fig Q Index Tektronix Serial Model NO t Description No Part No Eff Disc Y 1 2 3 4 5 1 ASSEMBLY carton assembly includes 2 CASE HALF 1 END CAP rear 1 END CAP front 1 CARTON 7A1...

Страница 103: ...s twss head steel wide or width l dex Tektronix SeriaVModel No t Description No Part No Eff Disc y 1 2 3 4 5 1 1 BOlOlOO B079999 1 B080000 1 2 1 PUSHBUTTON gray IDENTIFY 1 KNOB gray POSITION knob incl...

Страница 104: ...ousing 213 0181 00 1 SCREW thread forming 62 x 0 375 inch PHs 4 TERMINAL pin rnounthg hardware not included w assembly 1 SCREW 1 7 2 0 2 5 82Ocsk FHS 1 KNOB red VARIABLE CAL IN knob includes 1 SETSCRE...

Страница 105: ...G f l a t l a t c h detent BOLT l a t c h p l a s t i c SHIELDING GASKET SPRING f l a t s l i d i n g ground N U T BLOCK mounting hardware f o r each not included w nut block SCREW 4 40 x 0 188 inch 1...

Страница 106: ...1 NUT keps 4 40 x 0 25 inch 5 SCREW 4 40 x 0 25 inch 100 csk FHS 82 407 0621 00 1 BRACKET probe r e e l mounting hardware not included wlbracket 83 211 0541 00 5 SCREW 6 32 x 0 25 inch 100 csk FHS 84...

Страница 107: ...s WASHER spring tension TIP probe B O D Y HALF top BODY HALF bottom SHIELD e l e c t r i c a l CONTACT e l e c t r i c a l ground ASSEMBLY c i r c u i t board assembly includes CLIP e l e c t r i c a...

Страница 108: ......

Страница 109: ...a s t r i s e pulse almost equal i n amplitude t o whatever voltage i s applied a t the probe t i p Thus even i f a slowly changing DC voltage i n excess of 100 Volts has been applied t o the probe t...

Страница 110: ...AND SCHEMATIC CORRECTIONS CHANGE TO C255 281 0167 00 9 45 200 V R249 321 0091 00 86 6 R R258 321 0016 00 14 3 R R259 321 0091 00 86 6 R C255 R249 R258 and R259 a r e located on the ATTEN HATN W C i r...

Страница 111: ...ature dpdt 15 V DC K405 14870034 03 Armature dpdt 15 V DC K407 148 0034 03 Armature dpdt 15 V DC K411 148 0034 03 Armature dpdt 15 V DC K413 148 0034 03 Armature dpdt 15 V DC K415 148 0034 03 Armature...

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