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Tektronix 2235 Operator's Manual

An/usm-488 oscilloscope
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Summary of Contents for Tektronix 2235

  • Page 1 I~ro ι 2235 AN/USM-488 ι OSCILLOSCOPE ι ΙΝ ,$Τ` Ν MANUAL. - ι...
  • Page 2 CO MMITTED TO XC ELLEN C E ational eting Ce for Product Order Information, contact your local Tektronix sales representative or, in call U .S., 1-800-426-2200 ext 41 regon call collect (503)β27-9000 ext 41 Tektronix National Marketing Center Ρ.Ο. Box 500 D/S Υ6-088, Beaverto n, OR 97077...
  • Page 3 Copyright ~ 1984 Tektronix, Inc . All rights reserved . Contents of this publication may not be reproduced in any form without the written permission of Tektronix, Inc. Products of Tektronix, Inc . and its subsidiaries are covere U .S .
  • Page 4 Certificate of the anufacturer/Im orter 2235 ΑΝ/U SM -488 OSCILLOSCOPE ere by certify th at the N STA LLE D OPTIO NS N D ALL u irements of Amtsbl .-V fg 1046/1984 . lies wit h he RF Interference Sup ression re The German Postal Service was notified th at the equipment is eing mar keted .

  • Page 5: Table Of Contents

    2235 ΑΝ /USM-488 Operators TA BLE O F CO N T EN TS Page Section 3 OPERATING CONSIDERATIONS IST OF ILLUSTRATIONS ....GENERAL OPERATING INFORMATION IST OF TABLES .
  • Page 6 2235 ΑΝ /USM-488 Operators IST O F LLU ST R ATIO N S The 2235 Oscilloscope ............viii aximum input voltage vs .

  • Page 7: Operators Safety Summary

    2235 ΑΝ /USM-488 Operators S SA TY S ersonnel. Specific warnings e gene al safety info mation in this part of t mmary is fo operating and servicing in this summa e fo nd t out t e manual w ere t ey apply an o not a...

  • Page 8: The 2235 Oscilloscope

    2235 ΑΝ / SM-488 Operators -ο1 4976 The 2235 Oscillosco...

  • Page 9: Specification

    Sectio n 1-2235 ΑΝ/USM-488 Operators ENER ATIO CTIO The inst rument is s hipp ed with h e following stan dard Th e TEKTRO NIX 2235 Oscilloscope is α rugged, light- weig ht, dual-channel 100- MH z instrument that features α accessories : right, sharply defined trace on an 80- y 100-mm catho...

  • Page 10: Electrical Characteristics

    Ge neral Info rm ation-2235 ΑΝ /USM-488 Operators Table 1-1 Electrical Characte ristics P erfo rma nce Requ irements Cha r acteristics VERTICAL DEFLE CTIO N SYST EM Deflection actor ivision to 5 V per division in α 1-2-5 se quence . 2 mV Range Accu racy...
  • Page 11 Ge neral Information-2235 AN/USM-488 Operators Ta ble 1-1 (cont) equ ir e m e n ts Perform ance Characteristics VERTICA L DEFLECTIO N SYSTEM (cont) aximum Safe I nput oltage igure 1-1 for derating curve. DC Co upled 400 V (dc + ea k ac) or 800 V ac ρ-ρ...
  • Page 12 Ge neral Info rmation-2235 ΑΝ /USM-488 Op e r ators Ta ble 1-1 (cont) Characte ristics Performance equ irements TRIGGER SYSTEM (cont) Β TRIGGER (I nte rn al) Can be set to any oi nt of the trace that ca n be isplayed.
  • Page 13 General Informatio n-2235 ΑΝ /USM-488 Ope r ators Table 1-1 (cont) P erfo rma nce equirements Characteristics AG NIF ICATIO N) Χ-Υ OPERATIO N (Χ1 e r tical Deflection System (with VOLTS/DI V V aria ble Same as Deflection Factors controls in CA L detent).
  • Page 14 General nfo rmation-2235 ΑΝΙU5Μ-488 Operators Ιθθ 500 ΚΗ z Ι C42θ7-28 ig ure 1-1 . Maximum npu t voltage υ5. fre uency erating curve for CH 1 OR Χ, CH 2 OR Υ, and ΕΧΤ INPUT connectors.

  • Page 15: Environmental Characteristics

    General In fo rmation-2235 ΑΝ/ USM-488 Oper ato r s Ta ble 1-2 Enviro nme ntal Ch aracte r istics Ch aracte r istics Desc ription ΝΟΤΕ e instrument meets t e re irements of arag s 4 .5.5.1 .3, MIL-T-288000, 4 .5.5.1 .4, an 4.5.5.1 .2.2 for Type ΙΙΙ, Class 5 equipment, exce...

  • Page 16: Physical Characteristics

    General Information-2235 ΑΝ /USM-488 Operators Table 1-3 Physical Characteristics Characteristics Description Weight With Accessories g (20.0 lb). Without Accessories g (13.5 lb). Domesti c S hipp in g Weight 10 .9 g (24.1 lb). eight With Pouch (Empty) 150 mm (5 .9 in). Without Pouch 137 mm (5 .4 in).
  • Page 17 General Info rmation-2235 ANI US M-488 Operators 11 .21 [2851 15.91 [404] 20 .10 [510] 17.3 [440] 14-73 [374] 12 .88 11 .20 14.25 [284] [327] Ι Ι [362] ΙΙΙ 12 .60 9.12 [3201 [2321 i mensions are i n 4735-40 g ure 1-2.

  • Page 18: Section 2 Preparation For Use

    Section 2-2235 ANIUSM-488 Operator s PREPARATION FOR USE FIRST-TIME STA SAFETY efer to the "Operators Safety Su mm ary" at the front of Instrumen ts are s hippe d with he required power cord as this manual for power source, grou nding, and ot h er safety ordered by the customer .

  • Page 19: Instrument Cooling

    Preparatio n fo r Use-2235 ΑΝ /USM-488 Operators from t h e ower-i np ut source 1 . Unplug the power cor (if app licable) . LI NE FU SE slig htly rotate the fuse- h olde r cap 2. Press in an countercloc kwise to release it .

  • Page 20: Long-Term Care

    IN ST RUMENT REPAC KAGING mild deterge t with 95% wate er type of cleaner, cons lt you Tektronix Service To sh ip an instrument, it is recommended hat it ack- ter or representative. aged in th e original manner . The carton and packaging ma...
  • Page 21 α erson ho can be contacted, com- ark t he address of the Tektronix Service Center and plete instrument type and serial number, and α escription the return add ress on the carton in one or more prominent of the service required .

  • Page 22: Display And Power

    Pr eparatio n fo r Use-2235 ΑΝ /USM-488 Operators S, CO S, A DICATO eld in, compresses t h e Th e following escriptions are intended to familiarize the BEAM IND Switch-Wh en operator with he location, operation, and unction of the is play to within he graticule area and rovides α...
  • Page 23 Preparation for U se-2235 ΑΝ/US -488 Op e r ators 13 Inpu t Coup (AC-GND-DC) Switches-T hree- position switches that select the metho of co u pling th e input signals to t e inst r ment eflectio system . AC-Input signal is capacitively coupled to the ver- tical amplifier.

  • Page 24: Horizontal

    Preparatio n fo r Use-2235 ΑΝ / U SM-488 Operators TRIGGER SOUR CE Switches-Two butto n s th at se- AMP CA L Co nn ecto r-Provides an approximately lect the sou r ce of the internal triggering signal for the negative-goi ng, square-wave voltage (at ap- rigge r when the Α...

  • Page 25: Trigger

    P reparatio fo r Use-2235 ΑΝ/ USM-488 Operator s Β EC/DI V-T he Β Swee p is set ulli ng 28 β DELAY TIME POSITION Control-Selects the out the DLY'D SWE P kn ob an rotating it cloc k- amoun t of elay time etween the start ο# he Α...

  • Page 26: Rear Panel

    Preparation fo r Use-2235 ΑΝ /USM-488 Operators SG L SWP RESET-Press in he spring-ret urn but- vi ding α stable is play of the low-frequency ton momentarily to arm the Α Trigger circ uit for α components of α complex waveform . single-swee p dis play.
  • Page 27 Pr e pa r atio n fo r U se-2235 ΑΝ / USM -488 O p erato rs CA U TIO N CAUTION TO AVOID ELECTRIC FOR CONTI NUED IR E P ROTECTIO N SHOCK, ΤΗΕ OWER REPLACE ONLY WITH PE CI F I ED CORD PROTECTIVE TYPE AND RAT E D FUS E .

  • Page 28: General Operating Information

    Section 3-2235 ΑΝ / -488 Ope PER ATI N G CO N SID ER ATIO N S ENER ATIO T CO ATIC R PRE ACITO Th e g r atic ule is internally marked on the faceplate of the a rallax error crt to ena ble accurate meas urements without When the In put Coupling switc h is set to G ND, the input (see Figure 3-1) .
  • Page 29 perating Considerations-2235 ΑΝ/USM-488 Operators The following procedure should be used whenever the 3. Connect the robe tip to the signal source and wait probe tip is connected to α signal source aving α different several seconds for he input coupling capacitor to charge . o level than that previously applied, especially if the level difference is more than 10 times the OLTS/DIV...

  • Page 30: Adjustments

    Operating Co nsi derations-2235 ΑΝ /USM-488 Operators D AD RATO 'S C CTIO 2. Co nnect the two 10 Χ probes (supp lied with he instru- ment) to the CH 1 and CH 2 in put conn ectors . To verify the operation and accuracy of th is instrument erform t h e following before ma king meas ureme nts,...

  • Page 31: Vertical Deflection Check

    Operating Consid e r atio ns-2235 AN I USM-488 Operators 9. U se the Channel 2 POSITIO N to vertically center the 4. Select CH 1 VERTICA L MOD E and in sert th e ti p of display and epeat step 7 for the Channel 2 probe.

  • Page 32: Controls, Connectors And Indicators

    Section 4-2235 ΑΝ /USM-488 Operators IZATIO RUMEN CTIO The procedures in this art are designed to assist the irst obtain α baseline trace, sing the following user in quickly ecoming familiar with his instrument . They procedure. rovi de information which demonstrates the use of all the controls, connectors, and indicators and will enable the to efficiently operate the instrument .

  • Page 33: Displaying Α Signal

    Operating Procedures--2235 ΑΝ /USM-488 Operators 2. Press in he POW itch button (ON) . 2 . Set the square-wave generator for α 1 kHz square- wave signal an just its out ut to obtain α 4-division verti- cal dis lay. 3.
  • Page 34 Operating Procedur es-2235 ΑΝ / USM-488 Operators 8. Press in an d hold th e BEAM FI N D button ; the is play 12 . Select BOTH and ADD VERTICA L M OD E and ob- should reappear on th e sc r ee n. Adjust serve that the resulting isplay is 4 division s in am p litude .
  • Page 35 Operating Procedures-2235 ΑΝ /USM-488 Operators 25 . Press in and hold the TRIG IEW button . Observe 11 . otate the SEC/DIV Variable control out of the CAL he Channel 1 trigger signal that is resent in the Α Trigger detent to its maximum counterclockwise position .

  • Page 36: Procedures

    Operating Procedures-2235 ΑΝ /USM-488 Operators eadjust the Α TRIGGER LEVEL control for α stable 11 . NOTE isplay . RIGGER mode can be used to trigger on ei- The Α or familiarization w ther the TV Line or TV Field. V Field Sίg- hese functions see TV Line Signal an emove the square-wave signal from the CH 1 input...
  • Page 37 Operating Procedures-2235 ΑΝ/USM-488 Operators sing the Β Trigger Section 5. Return the Α SEC/DIV switch to 0.5 s an adjust the Α NTENSITY control for desired display rightness . otate the Β TRIGGER LEVEL control counterclock- wise to the midrange position, then adjust it for α stable lay.

  • Page 38: Introduction

    Operating Proce ures-2235 ΑΝ /USM-488 Operators ASIC A ICATIO VOLTAGE MEASUREMENTS NTRODUCTION Peak-to-Peak Voltage After becoming familiar with abilities of this oscil- he ca hen easily develop convenient loscope, an operator can To make α peak-to-peak voltage measurement, use the metho s for making particular measurements .

  • Page 39: Instantaneous V Oltage

    Operating Pr oce ures-2235 AN I USM -488 Operators erify that the VOLTSIDIV Variable co n trol is in the CA L etent an d set the Input Co upling switc to GND. MEMO ertically ositio n he baseline trace to the center hor- izontal graticule line .

  • Page 40: Common-Mode Rejection

    perating Procedures-2235 ΑΝ /USM-488 Operators 10 . Calculate t h e instantaneous voltage, using the fol- methods coul e use either to eliminate ot her nwanted frequency components or to rovi de α o offset . lowi ng fo rmula : O LTS/DIV switch setting nstanta-...

  • Page 41: Nondelayed Time

    Operating Procedures-2235 ΑΝ /USM-488 Operators 6. Select ADD VERTICAL MODE and pull out the Chan- nel 2 POSITION control nob to invert the Channel 2 p lay. Slightly readjust the CH 2 OLTS/DIV Variable control =MMENEEN1 for maximum cancellation of the un desired signal compo- nent (see igure 4-4 Β).

  • Page 42: Rise Time

    Operating Procedures-2235 ΑΝ /USM-488 Op e r ato r s requency MEN : MEN Th e fr eque n cy of α ecurrent signal can be dete rmi ned from its time-du ration meas urement as follows: 1002 FIE 1 1 --- easure the time du r atio n of one waveform cycle us- ing the preceding "Time Duration"...

  • Page 43: Phase Difference

    perating roce ures-2235 ΑΝ /USM-488 Operators etween two separate events . To measure time ifference, use the following proce ure: CHANNEL 1 (REFERENCE) CHANNEL 2 1 . Preset instrument controls and obtain α aseline trace, then set the Α TRIGGER SOURCE switch to CH 1 . loo .

  • Page 44: Television Displays

    Operating Proced ur es-2235 ΑΝ /USM-488 Operators 7. Adjust the Α TRIGGER LEVEL co ntrol fo r α stable display . CHANNEL 1 CHANNEL 2 (REFEREN CE) l (LAGGI NG) peed wh ic h 8. Set the Α EC/DI V switch to α swee p displays about one full cycle of the reference wavefo rm.

  • Page 45: Delayed-Sweep Magnification

    Operating Procedures-2235 ΑΝ /USM-488 Operators Α TRIGGER LEVEL control to its fully clockwise osition; 7. To display α selecte orizontal line, first trigger the for negative-going TV signal sync ulses, set the sweep on α vertical (field) sync pulse, then use the "Magni- Α...

  • Page 46: Delayed-Sweep Magnification

    Operating Procedures-2235 ΑΝ /USM-488 Operators agnified Sweep Ru ns Afte r Delay The following procedure explains how to operate the Β Sweep i n α ontriggered mode and to etermi ne the result- ing apparent magnification factor . 1 . Preset in st r ume nt co ntrols and obtain α baseline trace.

  • Page 47: Delayed-Sweep Time Measurements

    perating Procedu res-2235 ΑΝ /USM-488 Operators 3. Set the appropriate VO LTS/DIV switch to roduce α I NTEN SI FI ED ZONE display of app roximately 2 or 3 ivisions in am plitu de. AG N I FIED TO BE 4.

  • Page 48: R Ise Time

    Operating Procedures-2235 ΑΝ /USM-488 Operators 1 . Preset instrument controls and obtain α aseline 9. Adjust the Β DELAY TIME POSITION control clock- wise to move the intensified zone to the leading edge of the trace. second point of interest (on the Α trace) ; then fine adjust until the rising portion (on the Β...

  • Page 49: Rise Time, Differential Time Method

    Op e rating Pr ocedures-2235 ΑΝ /USM-488 Op erators 5. Select ALT HO R IZONTA L M OD E and CH 1 VERTI- CA L MOD E. Adjust both he Chan nel 1 POSITION control he Α/Β SWP SEP control so t h at the Α race is dis- played above the Β...

  • Page 50: Line

    Operating roce res-2235 ΑΝ / U S M -488 O pe r ato rs INTEN SI F I E D IN T EN SI IE D ZONE ON THE ZONE ON THE REFEREN C E COMP A RISO N REFERENC E CO MPAR ISON SIGNAL SIG N A L...

  • Page 51: Introduction

    α general ptions available at the time of publication of this manual . each instrument . Also included is α com plete list (with Tektronix umber) of stan dard accessories included with each instrument and artial list of optional accessories . Additional information α...

  • Page 52: Change Information

    ATIO At Te ktronix, we conti nually st rive to ee p up with latest electron ic developments by adding circuit an d component im pr ovements to our instruments as soon as they are develope an d teste d . Sometimes, due to printi n g and sh ip ing requireme nts, we can't get these ch anges im med iately into pri nted ma n uals .
  • Page 53 TeJdronbco L CH ATIO 5-5-86 Μ60037 εοπππππτεοτοεχεευεro οε Date : hange Refe rence : 2235 AN II J S M -488 O PERATOR S 070-4976-00 Pr odu ct: Manual Part No.: DESCRIPTION Product Group 46 Α new "Protective Rain Cover" is now available for he 2200 series so add he following to the Optional Accessories list: 016-0848-00...

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