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Tektronix-
2213 OSCILLOSCOPE
SERVICE INSTRUCTION MANUAL
2213 Service
TA BLE O F CO N T EN TS
L IST OF I LLUST RATIO NS . . . . . . . . . . . . . . . . . iv
LIST O F TA BLES . . . . . . . . . . . . . . . . . . . . . . . . OPERATO RS SA FE TY SUMMAR Y . . . . . . . . . . . . vi
S ERV ICING SA FE TY SUMMARY . . . . . . . . . . . . . vii
Page SE CTIO N 3 THE ORY O F OPERATIO N NTROD UCTIO N . . . . . . . . . . . . . G ENER AL DESC R I PTION . . . . . . . D E TAI LE D CI RCUIT DE SC R I PTION . . . . . . . . . . . . . . . VERTICAL ATTENUATO RS . . . In p ut Co u p ling . . . . . . . . . . . H ig h- Attenuato r . . . . . . . . . B uffer Amplifier a n d Low- Atte nuator . . . . . . . . . . . . . . Volts/Div Var Circuit and X1/X10 Amplifier . . . . . . . . . VERTICA L PREAMPS. . . . . . . . Chan nel 1 Vertical P ream plifier Channel 2 Vertical P reamplifier Internal Trigger P ickoff Amplifier. . . . . . . . . . . . . . . CHANNEL SW ITCH AN D VERTICA L O UTPU T . . . . . . . . Diode Gates . . . . . . . . . . . . . Delay L ine Driver . . . . . . . . . Delay L ine . . . . . . . . . . . . . . Vertical Out p ut Am plifier . . . . Chan nel Switch ing L ogic Circuit. . . . . . . . . . . . . . . . . Internal Trigger Switch ing L ogic . . . . . . . . . . . . . . . . . T R IGGER . . . . . . . . . . . . . . . . Internal Trigger Am p lifier . . . . Trigger Source-Switc hing Circuit. . . . . . . . . . . . . . . . . External Trigger Amplifier . . . A uto Trigger Circuit . . . . . . . . Trigger Level Comparator . . . . Inverting Am plifier an d TV T rigger Circuit . . . . . . . . . Sc h mitt T rigger Circ u it . . . . . . Au to B aseline Circuit . . . . . . . SWEEP G ENER ATOR AN D L OGIC . . . . . . . . . . . . . . . . . . Miller Swee p Ge nerator . . . . . Sweep L ogic . . . . . . . . . . . . . Delay Circuit . . . . . . . . . . . .
Page
I
. . 3-1 . . 3-2 . . . . . . . . 3-4 3-4 3-4 3-4
S E CTIO N 1 S PE CI F ICATION
NTROD UCTIO N . . . . . . . . . . . . . 1-1 ACCESSO R I ES. . . . . . . . . . . . . . . 1-1 PERF O RM ANCE CO N DITION S . . . 1-1 SECTIO N 2 OPERATING I NST RU CTIO NS PREP A R ATIO N F O R U S E . . . . . . . SA FE TY . . . . . . . . . . . . . . . . . L I NE VO LTAGE . . . . . . . . . . . P OWER CO R D . . . . . . . . . . . . . L I NE FU SE . . . . . . . . . . . . . . . CO NTRO LS, CO NNECTORS, AN D I N DICATO RS. . . . . . . . . . . . P OWER, DISPL AY, AN D PR OBE ADJU ST . . . . . . . . . . . . VERTICA L . . . . . . . . . . . . . . . H O R IZO NTA L . . . . . . . . . . . . . TR IGG ER . . . . . . . . . . . . . . . . RE AR PANEL . . . . . . . . . . . . . OPERATI NG CO NSIDER ATIO N S . . G RATIC ULE . . . . . . . . . . . . . . G ROUN DI NG . . . . . . . . . . . . . SIGNAL CO NNE CTIO N S . . . . . . I NPUT CO UPL I N G CA PACITOR PRE CH A RGI NG . . . . . . . . . . . . I N ST RUMENT COO L I NG . . . . . OSCI LL OSCO PE DISPL AYS. . . . . . NTROD U CTIO N . . . . . . . . . . . BAS EL I NE T R AC E . .. . . . . . . . . SIG N AL DISPLAY . . . . . . . . . . M AG N I F IED-SWEEP DISPLAY . . DEL AYE D-SWEEP DISPL AY . . . - DISPLAY . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-1 2-1 2-1 2-1
I
. . 3-5 . . . . . . . . 3-6 3-6 3-6 3-6
. . 3-7 . . . . . . . . . . 3-7 3-7 3-8 3-9 3-9
. . 2-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2-3 2-5 2-5 2-7 2-8 2-8 2-8 2-8 2-8 2-9 2-9 2-9 2-9 2-9 2-10 2-10 2-10
. . 3-9 . . 3-10 . . 3-12 . . 3-13 . . . . . . . . 3-13 3-13 3-13 3-14
I
. . 3-14 . . 3-15 . . 3-15 . . . . . . . . 3-15 3-15 3-16 3-18
TV SIGNAL DISPLAYS . . . . . . . . . . . 2-11
REV NOV 1981
2213 Service
TA BLE O F CO NT ENTS (cont)
Page S ECTIO N 3 THE ORY O F OPER ATION (co n t)
Page SECTIO N 5 AD JU STMEN T PROC E DURE I NT ROD UCTIO N . . . . . . . . . . . . PURPOS E . . . . . . . . . . . . . . . TEST E QU I PMEN T RE QU I RE D L I M ITS AND TO LER ANCES . . P ARTIAL PR OC E DURES . . . . AD JUSTMENT I NT ER ACTION PREP ARATIO N F O R AD JU ST MENT. . . . . . . . . . . . I N DEX TO AD JU ST MENT PR OC EDURE . . . . . . . . . . . . . POWER SUPPLY AN D CRT DISPL AY . . . . . . . . . . . . . . . . . VERTICA L . . . . . . . . . . . . . . . . H O R IZONTA L . . . . . . . . . . . . . . TR IGGER I NG . . . . . . . . . . . . . . EXT ERNAL Z-AXIS AND PR OBE AD JU ST . . . . . . . . . . . . .
S ECTION 6
DE TAI LE D CI RCU IT D ESC R I PTION (cont) AUTO I NTEN SITY AND Z-AXIS AM PL I F IER . . . . . . . . . . . . . . . Auto Intensity . . . . . . . . . . . -Axis Am p lifier . . . . . . . . . . HO R IZO NTA L . . . . . . . . . . . . . H orizontal Pream p lifier . . . . . Am p lifier . . . . . . . . . . . . H orizontal Output Am p lifier . . P OWER S UPPL Y . . . . . . . . . . . P ower Input . . . . . . . . . . . . . P reregulator . . . . . . . . . . . . . Inverter . . . . . . . . . . . . . . . . C RT Supply . . . . . . . . . . . . . Auto Focus Circuit . . . . . . . . Low-Voltage Supplies . . . . . . . DC R estorer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19 3-19 3-20 3-20 3-20 3-21 3-22 3-22 3-22 3-22 3-23 3-24 3-24 3-24 3-24
. . . . . .
. . . . . .
. . . . . .
5-1 5-1 5-1 5-1 5-1 5-1
. . . 5-3 . . . 5-3 . . . . . . . . . . . . 5-4 5-7 5-13 5-17
. . . 5-20
M AI NTEN AN CE
STATIC-S EN SITI VE CO MPONENTS PREVEN TI VE MAI N TEN ANC E . . . I NTROD UCTIO N . . . . . . . . . . . G ENER A L CA RE . . . . . . . . . . . I NSPE CTIO N AN D C LE AN I N G . LUBR ICATIO N . . . . . . . . . . . . S EM ICON DUCTO R CHE C K S . . . PER IODIC RE AD JU ST MENT . . . T ROUBLE SHOOTI NG . . . . . . . . . . INTROD UCTIO N . . . . . . . . . . . T ROUBLE SHOOTI NG AIDS . . . TR OUBLE SHOOTI NG EQUIPMENT . . . . . . . . . . . . . . T ROUBLE SHOOTI NG T E CHN IQ UE S . . . . . . . . . . . . . CO RRECTI VE MAI NTEN ANCE . . . NT ROD UCTIO N . . . . . . . . . . . MAI NTEN ANCE PRECAUTIONS OBTAIN I N G REPLAC EMENT P A RTS . . . . . . . . . . . . . . . . . . M AI NTEN AN CE AIDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6-2 6-2 6-2 6-2 6-4 6-4 6-4 6-5 6-5 6-5
S E CTIO N 4 PERF O RMANCE C HE C K PR OC EDURE
I NTROD UCTIO N .
. . . . . . . . . . . PURPOS E . . . . . . . . . . . . . . . T EST EQU IPMEN T RE QU I RE D L I M ITS AN D TOL ER ANCES . . PREP ARATIO N . . . . . . . . . . . I N DE X TO PERF O RM AN CE CHE CK ST EP S . . . . . . . . . . . . VERTICA L . . . . . . . . . . . . . . . . H O R IZO NTA L . . . . . . . . . . . . . . T R IGG ER I NG . . . . . . . . . . . . . . E XT ERNA L Z-AXIS AND PR OBE AD JU ST . . . . . . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
4-1 4-1 4-1 4-1 4-1 4-3 4-4 4-6 4-9
. . 6-7 . . . . . . . . 6-7 6-10 6-10 6-10
I
. . . 4-12
. . 6-10 . . 6-10
2213 Service
TABLE OF CONTENTS (cont)
Page SECTION 6 MAINTENANCE (cont) INTERCONNECTIONS . . . . . . . . TRANSISTORS AND INTEGRATED CIRCUITS . . . . . . SOLDERING TECHNIQUES . . . . . REMOVAL AND REPLACEMENT INSTRUCTIONS . . . . . . . . . . . . . Cabinet . . . . . . . . . . . . . . . . . Cathode-Ray Tube . . . . . . . . . . High-Voltage Shield . . . . . . . . . Attenuator/Sweep Circuit Board . . . . . . . . . . . . . . . . . . Front-Panel Circuit Board . . . . . Main Circuit Board . . . . . . . . . Current Limit Circuit Board . . . REPACKAGING FOR SHIPMENT . . 6-10 . 6-11 . 6-12 . . . . . . . . . 6-13 6-13 6-13 6-14 6-14 6-15 6-16 6-18 6-18 SECTION 7 OPTIONS SECTION 8 REPLACEABLE ELECTRICAL PARTS SECTION 9 DIAGRAMS SECTION 10 REPLACEABLE MECHANICAL PARTS ACCESSORIES
INTERNATIONAL SALES & SERVICE OFFICES U.S . SALES& SERVICE OFFICES CHANGE INFORMATION
2213 Service
s F s R s
Fig u re
Page The 2213
Oscillosco pe viii . . . . . . . . . . . . . . . . . 2-2 2-2 . . . . . . . . . . . . . . . . . 2-3
2-1 2-2 2-3 2-4 2-5 2-6
Power-i n put-voltage configu rations . . . . . . . . . . . . . . . . . . . . . . L ine fuse a nd power cord . . . . . . . . . . . . . . . . . . . . . . Power, d isp lay, a nd probe adjust controls, connector, an d ndicator
V e rtical co n t r ols an d connectors H orizontal co n t r ols . . . . . . . . .
i
2-7 2-8 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 4-1 6-1
Trigger controls, co nn ecto r, an d in dicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
R ear- panel connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 Gratic ule measurement ma rk ings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
B asic b lock d iagram of t he 2213 Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Detailed bloc k diagram of the Chan nel 1 attenuator an d attenuator switching tables Diod e gate b iasing for C hannel 1 d isplay . . . . . . . . . . . . . . . . . . . . . . . . . . . . CHOP VERTICA L MOD E waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Swee p timing d iagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sim plified diagram of the -Axis Switch i ng Logic circuit . . . . . . . . . . . . . . . . . . Detailed bloc k diagram of t he H orizontal Amplifier . . . . . . . . . . . . . . . . . . . . . . Sim plifie d diagram of the DC Restorer circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 3-8 3-11 3-16 3-18 3-21 3-25
Test setup fo r exte rnal trigger an d j itter chec ks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Multipin connecto r orie ntation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Color codes for resistors an d capacitors . Semiconductor lead co nfigurations . Locati ng components on sc hematic diagrams and circuit board illustrations . 2213 bloc k diagram. A12-Attenuator/Sweep board . Ci rcu it view of A12`-Atte nuato r/Sweep boar d. Circuit view of A10-Main boar d. A10-Main board . All -Front P anel b oard. A19-Current L imit board.
9-1 9-2 9-3 9-4 9-5 9-6 9-7 9-8 9-9 9-10
iv
2213 Service
LIST OF TABLES
Table 1-1 1-2 1-3 4-1 4-2 4-3 4-4 4-5 4-6 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 6-1 6-2 6-3 6-4 Page Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Environmental Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Physical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Test Equipment Required . . . . . . . . . . . . Deflection Accuracy Limits . . . . . . . . . . . Settings for Bandwidth Checks . . . . . . . . . Settings for Timing Accuracy Checks . . . . Delay Time Range Checks . . . . . . . . . . . . Switch Combinations for Triggering Checks Adjustment Interactions . . . . . . . . . . . . . Power Supply Limits and Ripple . . . . . . . Deflection Accuracy Limits . . . . . . . . . . . Attenuator Compensation Adjustments . . . Settings for Bandwidth Checks . . . . . . . . . Timing Accuracy . . . . . . . . . . . . . . . . . . Settings for Timing Accuracy Checks . . . . Delay Time Range Checks . . . . . . . . . . . . Switch Combinations for Triggering Checks Relative Susceptibility to Static-Discharge External Inspection Checklist . . . . . . . . Internal Inspection Checklist . . . . . . . . . Maintenance Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4-4 4-5 4-7 4-7 4-9 5-2 5-5 5-8 5-10 5-11 5-14 5-15 5-15 5-18 6-1 6-3 6-3 6-11
Damage . . . . . . . . . . . . . . . . . .
2213 Service
O PER ATO R S SA FETY S UMMARY
perating and servicing p ersonnel. Specific warnings The general safety information in this part of the summary is for b oth o and cautions will be found throughout the manual where they apply and do not appear in this summary.
Terms i n
CA UTION statements id entify conditio ns or pr actices that could result i n damage to the equ i pme nt or other property . identify cond itio ns or p ractices that co u l d result in pe rso nal in jury or loss of life .
WARN I NG stateme n ts
Th is Manual
Gro un d ing the
This p rodu ct is g rounded th rough t he groundi ng condu cto r of t he p ower cord. To avoid electrical shoc k, pl ug the power co rd into p roperly wired recepta b le before connecting to the product in pu t or outpu t terminals. protective ground co nn ectio n by way of the grou nd ing co nductor i n the powe r cord is essential for safe operatio n.
P roduct
Terms as
CA UTION indicates personal i nj ury h azard not immed iately accessible as one reads the ma rk ings, or h azard to property, inclu d ing t he equ ip ment itself . DA N G ER indicates perso nal inju ry h azard imme diately accessible as one r eads the ma rk ing. Symbols in This Manual T h is sym bol indicates where applicable cautiona ry or other info rmation is to be found. F o r maximum in put voltages, see Table 1-1 . Sym bols as
Mar ked on
Equipment
Danger Arising
Up on loss of the protective-grou nd co nn ection, all accessible co nductive p arts (i ncl u d i ng knobs an d cont r ols that may ap pear to b e insulating) can re nder an electric s h oc k.
F rom L oss of
Grou n d
U se only the p ower co rd an d connector specifie d for your produ ct .
U se only powe r cord th at is in good conditio n. F or detailed i nformatio n on p ower cord s and co nnectors see F igure 2-1 .
U se the Proper P ower Cord
M ar ked on Equ ipment
DA NG ER - H ig h voltage.
Protective grou nd (eart h ) te rminal .
ATTENTION - R efer to manual .
To avoi d fire h aza rd , use only fu se of the correct ty pe, voltage rati ng a n d c urrent rati ng as specifie d in the parts list for you r produ ct . Do
U se the P roper F use
P ower Source
Th is produ ct is intended to operate from power so u rce th at does not apply more than 250 volts rms betwee n t he supply conductors or b etween either supply co nductor and grou nd . protective groun d co nnection by way of the ground ing con d uctor i n t he power co rd is essential for safe operation .
To avoi d ex plosion, do n ot op erate th is p ro du ct in an explosive atmosph ere unless it h as been specifically ce rtified fo r s uch operation . Do
Not
Op erate in
Ex p losive
Atmos pheres
To avoid personal injury, d o n ot remove th e pr o d uct covers or p anels . Do n ot operate the produ ct wit hout the cove rs an d panels properly i nstalle d .
N ot R emove Covers
or
P anels
2213 Service
S ERV ICI N G SA FE TY S UMM AR Y
FO R Q UA L IFIED SERVICE PERSONNEL O NL Y
Refer also
to th e preceding Operators Safety Summary.
Do
N ot
Service Alone
Do not perform internal service or ad justment of this prod uct u nless another person capable of rend ering first aid and resuscitation is p resent .
Disconnect power b efore removing soldering, or replacing components .
protective
panels,
Power Source
This product is inten d ed to operate from power source that d oes not apply more than 250 volts rms between t he supply conductors or between either supp ly con d uctor an d ground . p rotective groun d connection by way of the groun d ing conductor in t he p ower cord is essential for safe o p eration .
Use
Care When Servicing With Power On
Dangerous voltages exist at several points in this product . To avoid personal injury, d o not touch expose d connections or components while p ower is on .
2213 Service
The 2213 Oscilloscope .
3827-01
Vill
Section 1-2213 Service
S PE CI F ICATIO N
IN
T ROD UCTION
PERF O RM A NC E CO N DITIO NS
T he following electrical characteristics (Table 1-1) are valid for the 2213 when it h as been adjusted at an ambient temperature between +2 ° an d +30° C, h as h ad a warm-up p erio d of at least 20 minutes, an d is operating at an ambient temperature between 0° C an d +50° C (unless otherwise noted) .
T he TEKTRONIX 2213 Oscilloscope is rugged, lightweight, d ual-channel, 60-MHz instrument that features bright, sharply defined trace on an 80- by 100-mm cathoderay tube (crt) . Its vertical system p rovi d es calibrate d d eflection factors from 2 mV p er division to 10 V per d ivision . Trigger circuits enable stable triggering over the full bandwidth of the vertical system . The h orizontal system provi d es calibrated sweep s p eeds from 0 .5s p er division to 50 n s per d ivision along with delaye d -swee p feature . 10 magnifier exten d s the maximum swee p spee d to 5 ns per d ivision .
ACC E SSO R I E S
T he instrument is shipp ed with accessories :
1 Operators manual 1 Service manual 2 2
Items listed in the "Performance Re q uirements" column are verifiable q ualitative or q uantitative limits, while items listed in the "Supplemental Information" column are either ex p lanatory notes, calibration setu p descri p tions, performance characteristics for which no absolute limits are specified , or characteristics that are impractical to check .
t he
following stan d ard
P robe p ackages P robe grabber tips
E nvironmental characteristics are given in Table 1-2 . The 2213 meets the requirements of MIL-T-28800B, Class 5 equi p ment, except where otherwise note d .
For p art numbers and further information about b oth stan d ar d and optional accessories, refer to the "Accessories" p age at the back of this manual . Your Tektronix representative, your local Tektronix F iel d Office, or the Tektronix p rod uct catalog can also provi d e accessories information .
Physical characteristics in Table 1-3 .
of the
instrument are listed
S p ecification-2213
Service Table 1-1 Characteristics Requirements
E lectrical
C haracteristics
P erformance
Supplemental Info rmation
VERTICA L D EFLE CTIO N SYST EM Deflection Factor 1 gain adj uste d with VOLTS/DI V switch set to 20 mV per division . 10 gain adjusted with VO LTS/DIV switch set to 2 mV per d ivision .
R ange
2 mV per d ivision to 10 V per d ivision i n 1-2-5 se quence.
racy
+20° C to +30° C 0° C to +50° C
±3% . +4% . Continuously variable b etween settings. Increases d eflection factor b y at least 2.5 to 1 . with vertically centere d 5-division refe rence signal from 50- source driving 50- coaxial cable that is te rminate d in 50 at t h e input connector, with t he V OLTS/DI V V ariable control in its CA L detent.
Measure d
of V OLTS/DIV V aria ble Control.
Range
Step
Response
R ise
Time
5.8 ns or less .
R ise time is calculated f rom t he formula: R ise
Time =
0 .35 BW (in MH z)
B an dwidt h
Measured with vertically centered 6- division refere n ce signal from 50- so urce d riving 50- coaxial ca ble t h at is terminated i n 50 , both at the in put connector an d at th e P61 20 probe input, with the V O LTS/DI V Varia ble control in its CA L d etent.
0°C to +40 C
20 mV to 10 V per Division 2 mV to 10 mV p er Division
Dc to at least 60 MHz . Dc to at least 50 MH z . Dc to at least 50 . . 250 kH z ±30%
+400 C to +500 C
2 mV to 10 V per Division
Ch op Mode R epetition Rate
Perfo rmance
R equ irement not checked
i n Se rvice Manual .
Specification-2213
Table 1-1 (cont) 0
Characteristics
Se r vice
P erforma nce R equ irements
Supplemental Information
VERTICA L D EFLE CTIO N SYST EM (cont) In put Characteristics
R esista nce
1 ±2%. 30 p F ±3 F . 400 V (dc + peak ac) or 800 V - ac to 1 kH z or less . 400 V (dc + peak ac) or 800 V - ac to 1 kH z or less At least 10 to 1 at 10 MH z. Chec ked at 20 mV per d ivision for common-mode signals of 8 divisions or less, with VOLTS/DI V Varia ble control ad ju sted for b est CMRR at 50 kH z.
Capacitance Maximum Safe In put Voltage Q DC Co uple d AC Couple d Common- Mode R ejection R atio (CM RR)
T R IGGER SYST EM
Trigger Sensitivity AUTO an d N ORM 0.4 division inte rnal or 50 mV external to 2 MH z, i ncreasi ng to 1 .5 divisions inte rnal or 250 mV external at 60 MHz .
E xternal trigger signal from 50- sou rce d riving 50- coaxial ca ble that is terminated in 50 at the in pu t connector. W ill trigger on tv line sync com ponents
in N ORM only : > 0.4 d ivisio n intern al or 50 mV - exte rnal. AU TO L owest U sable Frequ ency 20 z. 2.0 divisions of composite vi d eo or composite sync . 400 V (dc + peak ac) or 800 V - ac at 1 kH z or less . 1 ±2%. 30 p F ±3 F . 10 Hz or less at lower -3 d B point.
T V F I EL D
E xternal Input
Maximum Input Voltage Q In put R esistance Input Capacitance AC Coupled
LEVEL Control Range (wit h NO RM T R IGG ER MOD E) and DC
On screen limits . At least ±2 V (4 V -).
Perfo rmance R eq uirement not checked in Service Manual .
1-3
Specification-2213 Service
Table 1-1 (cont)
C haracteristics
Performance Re quirements
Su p plemental Information
T RIGGER SYSTEMAcont)
LEVEL Control R ange (with NORM T RIGGER MODE) (cont) an d DC - 10 At least ±20 V (40 V -p) .' Increases swee p hol doff time b y at least factor of four.'
VAR HOLDOFF Control R ange
H ORIZONTAL D EFLECTION SYSTEM
Sweep Rate Calibrated Range Swee p 0.5 s p er division to 0.05 s per d ivision in 1-2-5 se quence. 10 Magnifier exten ds maximum sweep spee d to 5 ns p er division . Unmagnifie d ±3°/ ±4 %
Accuracy +20° C to +30 °C 0° C to +50° C
POSITION Control R ange
Magnified
±5°/ ±6 %
Sweep accuracy applies over the cent 8 divisions. Exclude the first 25 ns of the sweep for both magnified and unmagnified sweep speeds and exclu anything b eyond the 100th magnified division .
Start of swee p to 100th division will position past the center vertical graticule line with 10 Magnifier. Continuously variable between calibrated settings . E xtends the sweep sp eed s by at least factor of 2.5 .
V ariable Control R ange
Delay Time
R ange Selector
Minimum delay is less than selected values of 0.5 s, 10 s, and 0.2 ms . Increases d elay time by at least factor of 20 . One part, or less, in 5,000 (0 .02%) of the maximum available delay time . - OPERATION ( 1 M AGNIFICATION)
MULTIPLIER Control Jitter
Deflection Factors
R ange
Same as Vertical Deflection System, with both VOLTS/DIV Variable controls in CAL detent .
'Performance R equirement not checked in Service Manual .
REV NOV 1981
:
0
Characteristics
S pecification-2213 Service
Table 1-1 (con t)
Perform ance Requ irements
- OPERATIO N (1 MAG NIFICATION) (cont)
Supple mental Informatio n
Deflection F actors (cont)
Accuracy
M easured with dc-coupled, 5-divisio n
refere
0°C to +50°C
+20°C to +30°C
nce
sig
n al .
Bandwidth
-Axis
M easured with 5-division reference
signal.
Ph ase Difference Between - an d -Axis Am plifiers PROBE ADJUST Signal at PR OBE ADJU ST Jac k
Voltage
0.5 V ±20%. 1 kHz ± 20%. Z-AXIS INPUT
Repetitio n Rate -
l ie Se nsitivity
5 V causes noticeable modulation . Positive-goi ng input signal decreases intensity Dc to 5 z. 30 V (dc + pea k ac) or 30 V - ac at 1 kH z or less ." 10 k ± 10%.
U sable Freq uency Range M axim um Safe Inp ut Voltage
Input Im pedance
P OWER SO UR CE
Line Voltage Range Line F requen cy Range
M aximum P ower Consumption
90V to 250V. 48 Hz to 62 z. 48 Hz to 440 z. 50 W . 40 W .
I nst ru ments with Curren t Limit Boa rd I nst ru ments with Preregulator Board
Inst ru ments with Current Limit Boa rd Inst ruments with Preregulator Board I nstruments with Current Limit Boa rd Instruments with Pr eregulator Board
Line F use
2, 250V, F ast 1 , 250V, Slow
° Perform a n ce R equ irement not c hec ked in Service Manual.
REV JUL 1982
1-5
S pecificatio n-2213 Service
Table 1-1 (cont) C h a racte r istics Performance R equirements CATHOD E-R AY TUBE Display Area Stan d ar d Ph osphor 80 by 100 mm .a 31 . 10,000 V.a Suppleme ntal Information
N ominal Accelerating Voltage
Perfo rma nce
R equi rement
not chec ked in Service Manual .
Table 1-2
E nvironme ntal Characteristics Characteristics
Desc ri p tion The instrument meets // of the following /L--288008 requirements for Class 5 equipment. NOTE
Temperature Operating
0°C to +50° C (+32 ° F to +122° F) . -55° C to +75° (-67 ° F to +167 ° F ) . To 4,500 m (15,000 ft). Maximum operating temperature d ecreased 1 ° C per 300 m (1,000 ft) a bove 1,500 m (5,000 ft) . To 15,000 m (50,000 ft) . 5 cycles (120 h ou rs) referenced to MIL-T-28800B, Class 5 instruments. 15 minutes along eac h of 3 major axes at total displacement of 0.015 inch - (2 .4 g at 55 Hz), with frequency varied from 10 Hz to 55 H z to 10 Hz in 1-minute swee ps. Hol d for 10 minutes at 55 Hz . All ma jor resonances must be above 55 Hz . 30 g, half-sine, 11-ms d uration; 3 shoc ks per axis each directio n, for total of 18 s hoc ks.
N onoperating
Altitu de Operating Nonoperating Humi dity (Operating an d Nonoperati ng) Vi bration (O perating)
Sh oc k (Operating an d N onoperating)
Specification-2213 Service Table 1-3 Physical Characteristics Characteristics Weight With Front-Panel Cover, Accessories, and Pouch Without Front-Panel Cover, Accessories, and Pouch Domestic Shipping Height With Feet and Handle Width With Handle Without Handle Depth With Front-Panel Cover Without Front-Panel Cover With Handle Extended Description 7 .6 kg (16 .8 lb). 6.1 kg (13 .5 lb) . 8.2 kg (18 .0 1b) . 137 mm (5 .4 in) .
361 mm (14 .2 in). 328 mm (12.9 in). 445 mm (17 .5 in) . 439 mm (17 .3 in). 511 mm (20.1 in) .
Sectio n 2-2213 Se rvice
O PER ATI N G I N ST RU CTIO N S
PREP A R ATIO N F O R U S E
SA FETY
Refer to th e Safety Summaries at t h e front of t h is ma n ual fo r power source, groun d ing, and oth er safety consi derations pertaining to t h e use of t h e 2213 . Before co n necti n g th e instrume n t to p ow er so u rce, caref u lly read th e followi n g informatio n a b out line voltages, power cor d s, a nd fuses ; then verify t h at t h e pro p er power-input fuse is i n stalled .
F or th e non-North America n customer (a nd for th e 240-V N orth America n user), th e a pp ropriate power cord is sup p lie d by an optio n t h at is s p ecified wh en th e instrumen t is ord ere d . Th e o p tional p ower cords available are illustrate d in F igure 2-1 .
LI NE FU S E
T h e instru ment fuse h ol d er is locate d on t h e rear p a n el (see F igu re 2-2) an d contai n s th e line fuse . V erify t h at t h e p roper fuse is installed by performi n g t h e following proce d ure : 1 . U n p lug th e p ower cord from t h e p ower-i n put source (if a p plicable) . 2 . P ress in an d slig h tly rotate th e fuse- h ol d er cap countercloc kwise to release it. 3 . Pull out t h e cap from th e fuse h ol d er, wit h th e fuse attach e d to t h e insid e of t h e ca p . 4.
L I NE VO LTAG E
Th e instrument is ca p able of continuous o p eration using ac-power-input voltages t h at range from 90 V to 250 V nominal at fre qu encies from 48 H z to 62 H z .
P O WER CO R D
F or t h e 120- V N orth American customer, th e 2213 is delivere d wit h th ree-wire power cord perma n ently attach ed . At t h e en d of t h e cord is three-contact p lug fo r connection to t h e power source and to p r otective groun d . T h e p lug's p rotective-grou nd contact connects (t h ro u g h th e p rotective-groun d con du ctor) to t h e accessi b le metal p arts of t h e instrument . F or electrical-s h ock p rotection, i n sert t h is plug only into power-source outlet th at h as securely g r ou nde d p rotective-gro u n d con tact .
N ote
fuse values an d verify p ro p er size (2 , 250 V, fast-blow) .
5 . Reinstall t h e fuse an d fu se-h ol d er cap .
O
perating I n structions-2213
Service
Plug Co nfiguration
Category
Powe r Cord and Plug Type
I nstalled I n strument Fuse
Factory
Hol der
Ca p
Fu se
L i ne Co rd
Plug Fuse
U.S . Do mestic Sta ndard
US 150V
1 , 250 V a Slow-blow AGC/3AG
AGC/3AG
No ne
.
'
Op tion 1
Euro 240V 10-16
1 , 250 V a Slow-blow 520 mm
520 mm
None
-'
~
Option 2
UK 240V 13
1 , 250 Va Slow-blow 520 mm
5 20 mm
13 Ty pe C
Option 3
Au st r alian 240V 10
1 , 250 Va Slow-blow 520 mm
520 mm
None
Option 4
Nort h Amer ica 240V 15
1 , 250 Va Slow-blow AGC/3AG
AGC/3AG
No ne 3397-03
I nstru ments containing the Current Li mit boa rd have 2 , 250 V, Fast- blow fuse.
Figur e 2-1. Power-input-voltage configurations.
FOR [ . RGF C 10 RE11ACI D .11 IT . III RATIO AND 5 . DISCO ANICT "' POWER INPUT BEFORE .ROOKS 1.
CA UTION Go
1. AVOID EIECIR 11 IRDCL THE PLAYER CORD
CAUTION
GROUNDING CONDUCTOR MUST SE CONNECTED TO GROUND 5 3 050 G06 INPUT 0[CR14111 S P CAUSES
5 m
MODULATION AT NORMAL INTENSITY " 3DV PEAK
F ig ure 2-2. L i ne fuse and power co rd.
2-2
REV JUL 1982
Ope r ati ng Inst ructio ns-2213 Service
CO NT R O LS, CO NNE CTO R S, A N D I N DICATO R S
Th e following d escri ptions are i n tended to familiarize t h e o p erator wit h t h e location, operation, a n d f un ction of t h e i n str u ment's co n trols, connectors, a n d in d icato r s .
be m aintained as c h anges occur in t h e intensity level of th e trace .
P OWER, DISPLAY, AN D
PR O BE ADJU ST
R efer to
I
F igure
2-3 for location of items 1 th rough 7 .
PR O BE ADJUST Connecto r- Provides an a pproximately 0 .5 V, n egative-going, sq u are-wave voltage (at approximately 1 kH z) th at permits t he operator to compen sate voltage probes and to c hec k operation of th e oscilloscope vertical system . It is n ot intended to ver ify t he accuracy of t he vertical gain or time-base calibration . BEAM F I N D Switch - Wh en h el d in, compresses t h e dis p lay to wit h in th e graticule area an d p rovides visible viewing intensity to ai d in locating off-scree n d is p lays .
nter n al Graticule- E liminates p arallax viewing error between t h e trace a n d graticule lines. R ise-time am p lit u d e and measurement p oints are i nd icated at t h e left e d ge of t h e graticule .
P OWER
Switch -Turns instrume n t p ower on and off . P ress in for ON ; press again for O FF .
T R AC E R OTATIO N Co ntrol-Screw d river co n trol u se d to align t h e crt trace with t h e h orizontal
graticule lines .
AU TO F OC U S
Control-Ad j usts dis p lay for optimum d efinition . Once set, t h e foc u s of t h e crt disp lay will
2213 6
A U TO I N T EN SITY Control-Ad ju sts brig h tness of t h e crt d is p lay . Th is cont r ol h as no effect wh e n t h e BEAM F I N D switc h is p ressed in . Once t h e co n trol is set, intensity is automatically maintained at approximately th e same level betwee n S E C/DI V switc h settings from 0.5 ms per d ivision to 0 .05 s per d ivision .
MENEM MENEM MENEM MENEM MOMME ONE
VERTICAL
R efer to
F igu re
2-4 for location of items 8 th roug h 16 .
S ER IA L an d Mo d Slots-T h e S ER IA L slot is imprinted wit h t h e instrument's serial nu mbe r . T h e M o d slot co n tains t h e o ptio n num b er t h at h as been installe d in t h e instrume n t .
1 O R an d C H 2 OR Connectors- P rovide for ap plication of exter n al signals to t h e in puts of
CH
3397-04
th e vertical d eflection system or for an - disp lay . In t h e - mo d e, t h e signal connecte d to t h e C H 1 O R connector provi d es h orizo n tal deflection, and t h e signal con n ected to t h e C H 2 O R conn ector provi d es vertical d eflection .
F igure 2-3. Powe r , d isplay, a nd p ro b e adj ust co nt rols, co nnecto r , an d in d icator .
GN D
Connector- P rovi d es instrument c h assis ground .
direct
co nn ection
to
REV NOV 1981
2-3
Operating Instructions-2213 Service
10 PROBE-Indicates t he d eflection selected when using 10 probe . factor
VOLTS/DIV Variable Controls-When rotated coun-
ter clockwise out of their detent positions, these controls provide continuously variable, uncalibrated deflection factors between the calibrated settings of the V OLTS/DIV switches . Extends maximum uncalibrated deflection factor to 25 volts per division with IX probe ( range of at least 2 .5 :1) .
I NVERT Switch-Inverts the Channel 2 d isplay when button is pressed in . P ush button must be pressed in second time to release it and regain noninverte d dis p lay .
VERTICAL MODE Switches-Two three-position switches are u sed to select the mode of operation for the vertical amplifier system . CH 1-Selects only the Channel 1 input signal for d isplay . 3397-05 Figure 2-4 . Vertical controls and connectors. BOTH-Selects both C hannel 1 a n d C hannel 2 input signals for display . The BOTH p osition must be selecte d for either ADD, ALT, or CHOP operation .
In put Cou p ling (AC-GND-DC) Switches-Used to select the method of coupling input signals to the vertical deflection system . AC-Input signal is capacitively coupled to the vertical amplifier . The d o component of the input signal is b locked . Low-frequency limit (-3 d B p oint) is a pp roximately 10 Hz . G N D-The in p ut of the vertical amplifier is grounde d to provi d e zero (groun d ) referencevoltage d isplay (does n ot groun d the input signal) . This switch p osition allows p recharging the input cou p ling ca p acitor . DC-All frequency components of the input signal are couple d to the vertical d eflection system .
C H 2-Selects only the Channel 2 input signal for display .
ADD-Disp lays the algebraic sum of the Channel 1 an d Channel 2 input signals . ALT-Alternately d is p lays Channel 1 and Channel 2 input signals . The alternation occurs d uring retrace at the end of each sweep . This mo d e is useful for viewing both i nput signals at swee p sp ee d s from 0.05 s p er d ivision to 0 .2 ms per division .
nel 1 and Channel 2 input signals during the sweep . The switching rate is a p proximately 250 kHz . This mo d e is u seful for viewing b oth Channel 1 and Channel 2 in p ut signals at sweep speeds from 0 .5 ms p er d ivision to 0 .5 s p er d ivision .
C HOP-The dis p lay switches between the Chan-
the VOLTS/DIV variable control must be in detent .
C H 1 VOLTS/DIV and CH 2 VOLTS/DIV SwitchesUsed to select the vertical d eflection factor in 1-2-5 se q uence . To obtain calibrated d eflection factor,
1 PROBE-Indicates the deflection factor selected when u sing either 1 p robe or coaxial cable .
POSITION Controls-Use d to vertically p osition the
display on the crt . When the SEC/DIV switch is set to - , the Channel 2 P OSITION control moves the d isplay vertically (Y-axis), and the H orizontal POSITION control moves the d isplay h orizontally (X-axis) .
2-4
REV NOV 1981
Operati ng I nstructio ns-2213 Service
HOR IZO NTAL
R efer to Figure 2-5 for location of items 17 through 22 .
SEC/DI V Variable Cont rol- P rovi des contin uously va riable, uncalibrated sweep sp ee ds to at least 2.5 ti mes the calibrated setting. It exte nds the slowest swee p spee d to at least 1 .25 s p er division . 10 Mag nifier Switch-To increase d is p layed swee p speed by factor of 10, pull out the SEC/DIV Variab le k nob. The fastest swee p speed can be exte nd ed to 5 n s p er division. Pu sh in the SEC/DI V Var iable co ntrol k nob to regain t h e 1 sweep spee d.
D EL AY TIME-Two controls are used in co njun ctio n
with I NT EN S and D LY'D HO R IZONTA L MOD E to select the amount of d elay time b etween t he start of the sweep and the begin n i ng of th e intensified zo ne.
R ange Selector Switc h-T his three-positio n switch selects 0.5 s, 10 s, an d 0.2 ms of delay time . To increase the swee p delay from th e calib r ate d setti n g of t h e R ange Selector switch , rotate t h e M ULTI PL I ER cont r ol cloc kwise .
H OR IZONTA L MOD E
switch dete r mi n es
MU LTI PL I ER Control- Pr ovi d es va r ia b le sweep d elay f rom less th an 1 to greate r t h an 20 times t h e setting of the R ange Selector switch .
S EC/DI V Switch -Used to select th e sweep spee d
h orizo n tal d eflection system .
th e mo de of operation for th e
Switch -Th is t h ree-position
D L Y- H orizo ntal deflection is provide d by t h e sweep ge nerator, without delayed start, at swee p speed d etermined by the S EC/DI V switch .
INTEN S- Horizontal d eflection is p rovi ded by th e swee p generato r at sweep speed d etermined b y the SEC/DI V switch . The swee p generator also provides an i ntensified zone on t he d is play. Th e start of the intensifie d zone repr esents t he swee pstart poi n t wh en DLY'D H O R IZONTA L MOD E is selected. DLY'D-Horizontal d eflectio n is provided by th e sweep generato r at sweep speed d etermi ned by the SEC/DI V switch setting. The start of th e sweep is delayed from the in itial swee p-t rigge r poi nt by time determined by the setting of the D EL AY TIME R a nge Selector switc h an d MULTIPL I ER cont rol . POSITION Control-Positions zo n tally in all mod es. the
for the swee p generato r in 1-2-5 sequ ence . For cali brate d swee p spee ds, the SEC/DI V Variable co ntrol must be i n the calibrated detent (f u lly cloc kwise).
d is play ho ri-
T R IGG ER
R efer to Figure 2-6 for location of items 23 th rough 31 .
I NPUT Connector- Provides means of i ntrodu cing extern al signals into the tr igger ge nerator . COUPLI NG S witch -Determines the method used to co up le exte rn al signals to th e Trigge r ci rcu it . AC-Sig n als above 60 H z are capacitively coupled to the in put of the T rigger circuit. Any do components are bloc ked, an d signals below 60 Hz are attenuated .
. Figure 2-5. H orizontal controls
O perating
Instructions-2213 Service
DC-All com ponents of th e signal are cou p led to t h e trigger circu itry . T h is position is usef u l for d isplaying low-frequency or low-repetition-rate signals. DC= 10- E xternal trigger signals are atten u ate d by factor of 10 .
2
Switch -Selects t h e sou r ce of t h e triggering signal w h en t he SO UR C E switc h is set to .
C H 1-T h e signal a pp lie d to t h e C H 1 O R in p ut
connector is th e sou rce of t h e trigger sig n al . VER T MOD E -T h e internal trigger source is determined by t h e signals selecte d for display by t h e VER TICA L M OD E switc h es .
15
SO UR C E Switc h -Determines t h e so u rce of t h e trigger signal t h at is couple d to th e in put of t h e trigger circuit . - P ermits triggering on signals t h at are a p plied to t h e C H 1 O R an d C H 2 O R input connectors . T h e so u rce of t h e internal signal is selected by t h e switch . triggering signal from sam p le of t h e ac-power-source waveform . Th is trigger so u rce is useful w h e n c h annel-in p ut signals are time related (m u lti p le or su bm u ltiple) to t h e fre q uency on th e powe r-source-in pu t voltage . - P ermits triggering on signals applied to t h e I NPU T connector.
C H 2-T h e signal a p p lie d to t h e C H 2 O R input
co nn ector is t h e source of t h e trigger signal .
LEVEL Control-Selects t h e amplit u d e p oint on th e trigger signal at w h ic h t h e swee p is triggere d .
L I NE - P rovi d es
T R IG'D In d icator-T h e lig h t-emitting d io d e ( LE D) illuminates to in d icate t h at th e sweep is triggere d .
S L O PE
Switch -Selects the slope of t he signal that triggers t he sweep . (also refer to TV Sig n al Displays at the en d of Sectio n 2) . -T-Sweep is triggered on p ortion of t h e trigger sig n al . -\--Sweep is triggered on p ortio n of t h e trigger signal . th e
p ositive-goi n g
negative-goi n g
th e
MOD E
sweep .
Switch -Determines t h e trigger mo d e for t h e
A U TO- Permits triggering on waveforms h avi n g repetition rates of at least 20 H z . Sweep free-runs in th e abse n ce of an adq uate trigger signal o r wh e n th e repetition rate is below 20 Hz . T h e ra n ge of t h e T R IGG ER LEVEL control will compensate for t h e amplitu d e variations of t h e t r igger signals .
N O R M-Sweep
is i n itiate d w h en an adeq u ate trigger signal is ap p lied . In t h e absence of t r igger signal, no baseli n e trace will b e p resent . Trigge r ing on television lines is accomplish e d in t h is mo d e .
T V FI EL D- P ermits triggeri ng on televisio n fieldrate sig n als (refe r to TV Signal Dis plays at t he e n d
of Section 2) .
VAR
3397-07 F ig ure 2-6 . T r igge r cont r ols, conn ector, and nd icato r .
i
H O L DO FF Control- P rovi d es co n tin u o u s control of h oldoff time b etween swee p s . Increases th e h ol d off time by at least factor of fo u r. T h is control im pr oves t h e ability to trigger on a p erio d ic signals (such as complex digital wavefo rms) .
2-6
REV N OV 1981
10
Operating Instr u ctions-2213 Service
RE A R P A NEL
R efer to
F igure
2-7 for location of item 32 .
d o not affect d is p lay wavesh ape . Signals wit h fast rise times a n d fall times p rovi d e t h e most abrupt
intensity modulate t h e crt dis p lay . App lied signals
AXIS Co n nector- P rovi d es means of connecting external signals to t h e Z-axis amplifier to
inte n sity c h ange, an d 5- V - signal will pro d uce noticeable modulation . Th e Z-axis signals m u st b e time-related to th e d isplay to o b tai n sta b le presentation on t h e crt .
FD CONTINUED FIRE PROTECTION FACE PC 01111 .11 G11EI1IN . TYPE AND RATED FUSE DISCONNECT INPUT F REPLACING FUSE REAL, 1 1 RANGE 90 50' FU5" 50 FAST
CA U TIO N
TO AVOID ELECTRIC SHOCK THE POWER CIRLD PROTECTIVE GROUNDING CONDUCTED MOST 81 CONNECTED TO GROUND % Z AXIS INPUT POSITIVE GOING INPUT -FEASTS 5 V 55 C~ l~ MODULATION AT 5 s30V PEAK
CAUTION
~ ~ COVFfl RFFFR 'IT 5 C1G TO 111 U D 5
POWER MAX WATTS 55 CO 16 5
,DID SIR,
.
,
3397-08
F igu re
2-7.
Rear-p an el
co
nnector.
2-7
Operati n g Instructions-2213 Service
O PER ATI N G CO N SID ER ATIO N S
n i q u es s h oul d meas u rements.
T h e following basic operati ng informatio n and tech be consi d ere d before attem pting any
SIG NA L CO NNECTIO NS
Generally, probes offer t h e most convenie n t means of connecti n g an inpu t signal to t h e instrument . Th ey are s h iel d e d to p revent p ic ku p of electromagnetic interference, a n d th e sup p lie d 10 p ro b e offers h ig h in p ut im pedance th at minimizes circu it loading . Th is allows t h e ci r cuit u n d er test to o p erate wit h mi n imum of c h ange from its n ormal con d itio n as measurements are being ma d e .
G R ATIC ULE
T h e gratic u le is internally ma rk ed on t h e face p late of th e crt to enable acc u rate measu reme n ts with out p arallax error (see F igure 2-8) . It is mar k e d wit h eigh t vertical and te n h orizontal maj or d ivisio n s . E ach ma j or divisio n is d ivi d e d into five su bd ivisions . T h e vertical d eflection factors an d h orizontal timing are cali b rated to th e graticule so th at acc u rate measurements can be mad e d irectly from th e crt . Also, percen tage mar k ers for t h e meas u rement of rise an d fall times are locate d on th e left side of t h e graticule .
G R OUN DI N G
T h e most reliable signal measurements are ma d e wh en th e 2213 an d th e unit un d er test a r e con n ected b y commo n reference (groun d lead), in add ition to t h e signal lea d or p ro b e . T h e probe's grou n d lea d p rovi d es th e b est g r oun d ing met h o d for signal interconnection and e n su res t h e maxim u m amount of signal-lea d s h iel d ing in th e p ro b e cab le. se p arate groun d lead can also be connected from t h e unit un d er test to t h e oscillosco p e G N D con nector locate d on t h e front p anel .
Coaxial ca b les may also be u sed to connect signals to th e in pu t connectors, b ut t h ey may h ave consi d erable effect on t h e accuracy of d isplaye d waveform . To maintain t h e original frequency c h aracteristics of an applied signal, only h ig h - quality, low-loss coaxial cables sh ould be u se d . Coaxial ca b les sh oul d be terminate d at bot h en d s in th eir c h aracteristic im pe d a n ce . If th is is not p ossi b le, use suitable im p eda n ce-matc h ing d evices .
T CO UPL I NG CA PACITO R PRE CHA R GI NG
I NPU Wh en th e in p ut cou p li ng switc h is set to G N D, th e i n put signal is connected to groun d t h roug h t h e in put coupli n g capacitor in series with 1- resistor to form p rec h arging network . Th is networ k allows t h e in put co up ling ca p acitor to c h arge to th e average d c-voltage level of t h e signal ap p lie d to t h e p ro be . Th us, any large voltage tra n sients t h at may acci de n tally be ge n erated will not be applied to t h e am p lifier in p u t w h en th e inp u t cou p ling switc h is move d from G N D to AC . T h e p rec h arging n etwor k also provi d es measu re of p rotection to t h e external circuitry b y re d ucing th e cu rrent levels t h at can b e d rawn from th e exter n al circ u itry d uring capacitor ch arging .
1ST O R LEF T VER TICA L G R ATIC ULE L I NE
C EN T ER VER TICA L G RATIC ULE L I NE
11TH OR R IG H T VER TICA L G R ATIC ULE L I NE
R IS E A N D F A LL TIME ME ASUREMEN T PER C EN TAG E M A RKER S
H O R IZO N TA L
G R ATIC ULE L I NE
C EN T ER
T h e following p roced ure s h oul d be used w h enever th e probe tip is connecte d to signal source h avi n g d iffe r ent d o level t h an t h at previously ap p lied, es p ecially if t h e d clevel differe n ce is more t h an 10 times t h e V O L TS/DI V switc h setting : 1 . Set t h e AC-G N D-DC switc h to G N D before connecting t h e p robe ti p to signal source . 2 . Insert t h e connector .
4115-16
F ig ure 2-8 . Graticu le measu rem e n t mar k i n gs .
p ro b e ti p into th e oscillosco p e G N D
2-8
Operating
to d ischarge .
3.
Instructions-2213 Service
W ait several seconds for the input coupling capacitor
remain on the screen, an d the ac com p onent of the signal can be measured in th e normal manner .
I NST RUMENT
6. Set the AC-GND-DC switch to AC . The display will
4. Co nn ect the p ro be ti p to the signal so u rce . 5. Wait several seconds for t h e i nput co up ling ca pacitor to charge .
COO LIN G
To maintain a d equate in strument cooling, the ventilation holes on b ot h sides an d rear p anel of th e e q u i pment ca binet must remain free of obstructions .
OSCI LL OSCO PE DIS PLAYS
I NTR OD U CTIO N
Trigger
V AR HO L DO FF
SLO PE LEVEL M OD E CO UPLING SO UR CE
The proced ure in th is section will allow you to set up an d operate you r instrument to obtain the most commonly used oscilloscope d is p lays . Before starti ng this pr ocedu re, ve rify that t h e POWER switch is OFF (pus h button out), then plug th e p ower cord into an approve d ac- p ower-source outlet .
NO RM (fully co un tercloc kwise) f (lever up) Mi d ra nge A UTO AC VERT M OD E
B AS ELI NE TR AC E
F irst obtain b aseline trace.
1 . P reset th e instrume nt front-panel co ntrols as follows: Disp lay AUTO I NT EN SITY AUTO F OC US
2. Press i n th e POWER switch button (ON) and allow the instrume n t to warm up for 20 minutes. 3. Ad just the AUTO I N TEN SITY control for desire d
d isplay brightness.
(minim um) M i d range
F ully countercloc kwise
4. Adju st the V ertical and H orizontal controls to center the trace on the screen .
P OSITIO N
Vertical
( Both
AC-G N D-DC AC 50 (1 ) m V O LTS/DIV CA L dete nt V O LTS/DI V Varia ble (fully cloc kwise) CH 1 VERTICA L M OD E Off (b utton out) INVER T M i d ra nge P OSITIO N S EC/DI V S E C/DI V Variable
C h annels)
SIG NAL DIS PLAY
1 . Obtain baseline trace . 2. Apply sign al to either vertical-c hannel input connector an d set the VERTICA L MOD E switch to display th e channel use d . To display two time-related in put signals use both vertical-c h an nel i n p ut co nn ecto rs an d select BOTH VERTICA L MOD E ; th en select either ALT or CHOP, depen d ing on th e fre q uency of in put signals . 3. Ad just the AUTO I NTEN SITY control for desire d display brig h tness. If the disp lay is not visi b le with t he AUTO I NT EN SITY control at midrange, press the BEAM F I N D p us h b utton an d hol d it in wh ile a d justing the a pp ro p riate V O LTS/DI V switch (es) to re d uce the vertical
H orizontal
H O R IZO NTA L MOD E 10 M agnifier POSITIO N D EL AY TIME R ange Selector MULTI PL I ER
L oc ke d together at 0.5 ms CA L d etent (fully cloc kwise) D LY Off (varia ble knob in) M idrange
0.2 ms F ully countercloc kwise
2-9
Op erating I n stru ctions-2213 Service d is p lay size . Ce n ter th e com p resse d display wit h in th e graticule area using t h e Vertical an d H orizontal P OSITIO N controls, th en release t h e BEAM F I N D p ush b utton .
4 . Ad j ust th e T R IGG ER LEVEL control, if necessary, to o b tain sta b le display . 5 . Set th e ap p ro p riate V O L TS/DI V switc h (es) and readju st t h e V ertical and H orizontal POSITIO N controls to center th e d is p lay with in t h e gratic u le area . 6 . Set t h e S E C/DI V switch for th e desire d number of cycles of t h e d is p layed signal . Th en a dj ust th e A U TO F OC U S control for t h e best-define d dis p lay . 3. Ad j ust th e A U TO I N T EN SITY control as nee d ed to ma ke th e intensifie d zone d istinguis h able from t h e remain d er of t h e d isplay .
4 . Adj ust t h e D EL AY TIME MUL TI PL I ER control to move t h e start of t h e inte n sified zone to t h e start of th e p oint of interest on t h e crt trace . To capture an event th at occurs after th e swee p en d s, a dj ust t h e start of t h e intensified zone p ast t h e en d of th e swee p.
- DIS PLAY
1 . O b tain baseline trace .
MAG N I F I E D-S WEEP DIS P LAY
1 . Obtain Signal Display (see preceding instructions) . 2 . A d ju st th e H orizontal P OSITIO N control to move t h e trace area t h at is to be magnifie d to t h e center of th e crt graticule (0 .5 d ivision on eac h si d e of t h e center vertical graticule line) . Ch a n ge t h e S E C/DI V switc h setting as re q uired . 3. Pull out th e S E C/DI V V ariable kno b ( 10) to obtain swee p magnificatio n . 4 . Ad j ust th e H orizontal POSITIO N control for p recise positioni n g of t h e magnifie d d is p lay . 5 . To calculate th e magnified sweep s p eed , d ivi d e t h e S E C/DI V switc h setting b y 10 .
2 . U se e q ual-le n gth coaxial cables, or t h e two 10 p robes su p p lie d with t h e i n strument, to apply th e h orizo n tal signal (X-axis) to t h e C H 1 O R i n p u t con n ector an d to apply th e vertical signal (Y-axis) to t h e C H 2 O R in p u t connector .
3. Select - mode by switc h ing t h e S E C/DI V switc h to its fully countercloc kwise p ositio n .
4 . Advance th e A U TO I N T EN SITY control setting until two d ots are dis p laye d . T h e d isplay can be p ositioned h orizontally with h e H orizo n tal POSITIO N control an d ve rtically wit h t h e C h annel 2 P OSITIO N control .
t
D E LA YE D-SWEEP DIS PLAY
1 . O btain Signal Display . 2 . Select I N T E N S H O R IZO N TA L M OD E an d set t h e D EL AY TIME Range Selector switc h to t h e d esire d amount of d elay time .
hen sinusoidal signals are The display obtained w applied to the - and Y-axis is called L issajous figure . This display is commonly used to compare the frequency and phase relationships of two input signals. The frequency relationship of the two input signals determines the pattern seen. The pattern will be stable only if common divisor exists between the two frequencies.
Operating Inst ru ctions-2213 Service
T V SIG NA L DISPLAYS
Displaying T V Line-rate Signal
Displaying T V Field-rate Signal 1 . Perform Step 1 under Displayi ng TV L ine-rate Signal . 2. Set SEC/DI V to 2 ms, T R IGGER MOD E to TV FI ELD and & to CH 1 or CH 2 as app ropriate for the app lied signal . 3. Perform Step 3 and 4 under Displayi ng TV Line- rate Signal . 4. To dis p lay either Field 1 or F ield 2 individually at faster sweep rates (displays of less than one full fiel d), set VERTICA L MOD E to BOTH and ALT simultaneously . This sync hron izes th e Channel 1 dis p lay to one field and the Ch annel 2 display to the ot her fiel d. To change t he field that is displayed, interrupt the triggering by repeatedly setting the AC GND DC switch to GND or disco nnecting the signal from the applied signal inp ut u ntil the ot her fiel d is displayed. To display both fields simultaneously, apply the input signal to both t he CH 1 and CH 2 in puts via two probes, two cables, or through dual-i npu t coupler. To examine either T V Field-rate or Line-rate signal in mo re detail, either the X10 M agnifier or HO RIZONTAL M OD E functions may be em ployed as described for other signals elsewhere in this manual .
under Baseli n e Trace and Signal Display to obtain basic display of t he desired TV signal .
2. Set SEC/DI V to 10 s, and & to CH 1 or CH 2 as appropriate fo r applied signal . 3. Set T RIGGER SLOPE for p ositive-goi ng signal (lever up) if the applied TV signal sync pulses are p ositivegoing, or for negative-going signal (lever down) if the TV sync p ulses are n egative-goi ng. 4. Adjust the T R IGGER LEVER control for stable d isplay, an d AUTO INTENSITY for d esired display brig htness . If necessa ry, adjust VERTICA L VOLTS/DI V control to obtain 5 divisions or greater am plitude fo r stable display.
1 . Perform the steps an d set th e controls as outlined
NOV 1981
2- 1 1
Section 3-2213 Service
T HE O R Y O F O PER AT I O N
IN
T R OD U CTIO N
IN
S E CTIO N ORGA N IZATIO N
This section contains functional d escription of th e 2213 Oscillosco p e circuitry. The d iscussion begi ns with ge neral summary of instrument fun ctions followed by d etailed desc ri ption of eac h ma jor circuit. F unctional block diagrams an d sch ematic d iag r ams a re used to s how t h e intercon n ections between parts of the circuitry, to in dicate circuit comp onents, and to identify inter relationsh i ps with the front-panel controls .
TE G RAT E D CI RCU IT D E SC R I PTIO NS L ogic Co nventions
Sc hematic d iagrams and the overall bloc k d iagram are locate d i n t h e tabbed "Diagrams" section at the back of t h is manual . The schematic d iagram associate d with each d escri ption is i d entifie d in the text and indicated on th e ta b of th e a pp ro p r iate fol do ut p age by nu mbered d iamond symbol . F or best u n d erstan d ing of the circuit b eing d escribed , refer to both the ap p ro p riate schematic d iagram an d t h e functional b lock diagram .
Digital logic circuits perform many functions within the instru me nt. Fu nctions and operatio n of the logic circuits are re presented by logic symbology an d terminology . M ost logic functions are d escribe d using the p ositive-logic convention . P ositive logic is system of notation whereby t h e more p ositive of two levels is th e T RUE (o r 1) state; t he more negative level is the F ALS E (or 0) state. In t h is logic descri ption the TRUE state is referred to as , an d t he F ALSE state is referred to as L O. Th e specific voltages wh ich co nstitute or LO state vary between specific devices. F or sp ecific d evice characteristics, refer to the manu facturer's d ata boo k.
Digital
L inear Devices
d evices in th is section use waveforms or ot h er techni qu es
such as voltage meas urement an d simplified d iagrams to illustrate their operation.
The functioning of ind ivi d ual linear integrated circu it
Th eory
of Op eratio n -2213 Service
G ENER L D E
A In t h e following overall f u nctional descri ption of t h e 2213 Oscillosco pe, refe r to t h e basic bloc k d iagram ( F igure 3-1) an d to t h e d etailed b loc k diagram ( F igure 9-4) located in th e "Diagrams" section of th is man u al . In F igures 3-1 a nd 9-4, t h e num bered d iamon d symbol in eac h maj or bloc k refers to t h e a ppro p riate sc h ematic d iagram num b er . Signals to be d is p layed on t h e crt are applie d to eit h er th e C H 1 O R in p ut connector or t h e C H 2 O R np ut connector . T h e signals may be cou p led to th e atte nu ator circuit eit h er d irectly (DC) or t h roug h an i n put-cou p ling ca p acitor (AC) . Th e input may also be discon n ecte d and th e input to th e attenuators grounde d w h en t h e G N D p osition of t h e cou p ling switc h is use d . In t h e G N D p osition, t h e ac-cou p ling ca p acitor is allowe d to p rec h arge to th e do level p resent at t h e input con n ector . Th is p rech arging p revents large trace s h ifts of t h e d is p lay w h en switc h ing from G N D to AC cou pling .
SC
R P
I
TIO
N
signal, or
source in put waveform to d evelo p t h e triggering signal for th e Swee p Generator. An Auto Trigger circ u it ensures th at th e range of t h e T R IGG ER LEVEL control conforms a pp roximately to t h e p ea k-to- p ea k am p litu d e of t h e trigger signal w h en eit h er A U TO or T V F I EL D T R IGG ER M OD E is selected . In N O RM M OD E , th e T R IGG ER LEVEL control must b e adj usted for t h e cor rect trigger signal level before swee p can be generate d . TV Fiel d sync circuit p rovi d es stable triggering on televisio n -signal vertical-sync pulses. Triggering at t h e television line rate is accomplish e d wh en eit h er A U TO or N O RM MOD E is used . Th e Sweep L ogic circuit controls t h e generatio n of th e swee p an d t h e unblan king of t h e -Axis Amplifier for th e Swee p d is p lay . Wh en t h e T R IGG ER M OD E switc h is set to eith er AU TO or T V F I EL D an d no trigger signal is p resent, t h e Auto Baseline circuit causes t h e Swee p Logic circuit to prod u ce s w eep after p erio d of time . In th e N O RM p osition of t h e T R IGG ER M OD E switch t h e Auto Baseline circuit is d isable d , an d swee p will not be generate d until triggering signal is received . T h e outpu t gate signal from t h e Swee p Logic circ u it is a pp lie d to th e M iller Swee p circuit . T h is circuit p ro d uces linear sweep output wit h run-up time th at is controlled by t h e S E C/DI V switch . Th e sweep signal is a p plie d to t h e H orizontal Pream p lifier for initial amplification . F inal am plification of t h e swee p signal to d rive t h e crt h orizontal d eflection plates is provi d e d by t h e H orizontal Out p ut Am p lifier . Th e H orizo n tal P reamplifier gain is increased b y factor of 10 w h en t h e 10 M agnifier feature is used . H orizontal positioning of th e d isplay is also accom p lish e d in t h e H orizontal Pream p lifier circu it . In th e - M o d e of o p eration th e C H 1 signal, via t h e internal Trigger circuitry, is a pplie d to th e Amplifier w h ere it is am p lified for a pp lication to t h e H orizontal P ream p lifier. In t h is o perating mode, t h e C H 1 I n ter n al Trigger signal su pp lies t h e h orizo n tal d eflectio n to t h e crt, an d ' sweep signal is not p roduce d by t h e M iller Swee p circu it . T h e H O R IZO N TA L MOD E switch ( D L Y, I N T EN S, an d D L Y'D) controls th e action of t h e Delay circuit . Th is
L ine
Trigger sig n al o btai n ed from t h e ac- p ower-
i
E ac h c h annel out p ut signal f r om th e Atten u ator circuitry is a pp lied to th e Vertical P ream p lifier circu itry for furt h er amplification . Th e Ch annel 2 P reamplifier i nclu des an Invert feature th at allows t h e operator to invert t h e Ch annel 2 signal d is p lay on th e cat h o d e-ray tube (crt) . Trigger P ic koff Am p lifiers in eac h ch an n el supply an internal trigger signal from eith er c h an n el signal or from both ch annels to th e Internal Trigger Am p lifier in t h e Trigger circuitry . E ac h c h annel signal is selecte d for display in turn by t h e C h annel Switc h ing L ogic circuit under control of t h e front- p anel VER TICA L M OD E switc h es . Th e out p ut signal from t h e C h annel Switc h ing Logic circuit is a pp lie d to Dio d e Gate circuit . T h e Diode Gate circuit switch es eit h er c h annel signal (or bot h signals for ADD) to Delay L ine Driver stage t h at su pp lies t h e p ro p er drive an d im pe d a n ce matc h to t h e Delay L ine . T h e Delay Line prod u ces approximately 100 ns of d elay in t h e vertical signal to allow the H orizontal circuitry time to p ro d uce th e necessary swee p to d is p lay th e signal .
F inal am p lification of th e vertical signal is s up plied by t h e Vertical Out p ut Am p lifier . T h e Vertical Out p ut Am p lifier su p plies th e re qu ire d signal levels necessary to p ro d uce vertical d eflection of t h e electron beam in t h e crt .
Th e Trigger circu itry u ses eit h e r h e Internal Trigger signal d erive d from t h e input signal(s), an E xternal Trigger
t
3- 2
Theory of Operatio n-2213 Service
CN 1 0R
"~
URS
CH 1 AND CH 2
CH 1
CH 2 CH 2 OR
CH 1 AND CH 2 VERT ICAL PREAMPS
CH 1+
CH 2CH 1 TRIG CH 2 TRIG CH 1 VERTICAL MODE BOTH CH 2 AM ALT CHOP
CH 1CH 2+
VERT I CAL CHANNEL S W ITCH AND VERT ICAL OUTPUT VERT I CAL
SIG SIG
+ -
1~7
49
CH 1
VERT MODE CH 2
7 TRIGGER SOURCE
+ J
J VARIABLE SEC/DIV CAL < AUTO < g <
TIMING
S WITCH
8
VAR HOLDOFF
CRT V87
SOURCE
L INE
TRI GGER -AXIS SIG TRI G SI G AUTO BASE LINE I
g = _
AUTO NORMAL IN. TV F IELD 7 I NPUT ~~
X-AXIS SIG L/ R OUTPUT 7 R R \ /
SWEEP GENERATOR AND - S L OGIC ALT SYNC SWP ~ < BEAM
F IND SWP
HORIZONTAL M ODE
DLY
S DLY'D 0 .2 1 .5 lip
&
U
DELAY
TIME
<
. 1 PL 1 ER
PROBE D JUST
-DR I VE SW DUTY S LEVEL A UTO INTENSITY AND Z-AXIS -DRIVE S
CRT ANODE .
P OWER SUPPLY PROBE
DJ> AND CR7
FOCUS INTENSITY _
I NTENSI TY
BEAM FI ND
A UTO
-
CATHODE
LINE
TRI GGER
L TO A LL BLOCKS 3827-11
F igure
3-1 .
B asic
block
d iagram
of the 2213 Oscilloscope .
'
@
3-3
T heory of Operation-2213 Service circ u it fun ctions to either pro d uce no d elay, disp lay an intensified zone on the Swee p dis p lay, or to d elay the start of the Swee p fo r perio d of time after receivi ng triggering signal . The d elay time is established by two front-panel controls : the DEL AY TIME switch wh ich sets th e basic d elay, an d t he MULTI PL I ER p otentiometer wh ic h increases the basic d elay b y factor of up to twenty times. Out p ut signals from the Delay circuit are a p plie d to logic gate circuit to control both the timing of the start of the swee p an d the -Axis drive . The -Axis d rive from the Sweep L ogic circuit is app lie d to the -Axis amplifier. The output signal from the -Axis Am p lifier circuit sets the crt intensity. Chop Blan king signal from the Ch o p Oscillator circuit b lanks the crt d is play d uri ng the transition between the vertical channels when using CH OP VERTICA L MOD E. The Swp Duty signal from the Sweep Logic circuit is ap plied to the Auto Intensity circuit. The Auto Inte nsity circuit provides partial cont rol of the intensity of the d is p lay when switch ing b etween different p ositio ns of t h e S EC/DI V switch . The P ower Supp ly provides all the necessary o p erating voltages for th e instrument circuitry . Operating p otentials are obtained from circuit com posed of the P reregulator, Inverte r an d Transforme r, and Rectifiers an d F ilters . The Preregulator p roduces ap p roximately +45 V from the acpower-input source wh ich is used to drive the 20-kH z Inverter stage. The Transformer secondary win d ings provide various ac levels that are rectifie d an d filtered to produce the operating voltages. H igh -voltage M ultiplie r circuit p ro d uces the accelerating, focus, and cathode potentials re q u ired by t he crt. front- p anel PR OBE AD JU ST output is provi d ed for use in a djusti ng probe compensation . The voltage at the PR O BE ADJU ST co nnector is negative-going sq uare wave that h as pea k-to- pea k amplitu d e of approximately 0.5 V an d repetition rate of app roximately 1 kH z.
The DC Restoration circuit raises the out p ut level of the -Axis Am p lifier to allow it to be coupled to the crt control gri d . Direct co u p ling is not em ployed due to the am p litude of the voltage levels ap plied to the crt elements .
D E TAI LE D CI R C U IT D E SC R I P TIO N
VERTICA L ATT ENUATORS
Both the Channel 1 and Channel 2 Atte nuator ci rcuits, shown in Diagram 1, are identical in operation. In the following d iscussio n, only th