Informations de l’équipement

Tektronix 2246 2R Oscilloscopes
Fabricant:
Tektronix
Modèle: 2246 2R
Date: 1989
Catégorie: Mètres
Groupe: Oscilloscopes
Description: PORTABLE OSCILLOSCOPE
Informations:
                                    

Ces manuels sont disponibles pour les équipements ci-dessus :

Tektronix -- 2246 2R -- Manuel de l'utilisateur
Nom de fichier: Tektronix-2489-Manual-Page-1-Picture
Type manuel: Manuel de l'utilisateur
Pages: 218
Taille: 1.55 Mbytes (1621527 Bytes)
Langue: Anglais
Révision:
Numéro d’identification: 070-7061-00
Date: juin 1989
Qualité: Document scanné, tous les lisible.
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Informations:
Tektronix-2489-Manual-Page-1-Picture
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Tektronix -- 2246 2R -- Service et Manuel de l'utilisateur
Nom de fichier: Tektronix-8426-Manual-Page-1-Picture
Type manuel: Service et Manuel de l'utilisateur
Pages: 380
Taille: 25.30 Mbytes (26531116 Bytes)
Langue: Anglais
Révision: Revised
Numéro d’identification: 070-70620-00
Date: 01 octobre 1991
Qualité: Document scanné, la lecture en partie mal, en partie illisible.
Télécharger date:
MD5: ac013e58372c50f00c1d8d4943016829
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Informations:
SN B700100 and ABOVE (2246 1Y, 2R)
SN B100100 and ABOVE (2246 MOD A)


LIST OF ILLUSTRATIONS................... vi

LIST OF TABLES ..........................vii

OPERATORS SAFETY SUMMARY........... viii

SERVICING SAFETY SUMMARY ............. ix
Section 1 SPECIFICATION
INTRODUCTION..........

STANDARD ACCESSORIES
RECOMMENDED RECALIBRATION SCHEDULE .................1-1

PERFORMANCE CONDITIONS . . 1-2
Section 2 PREPARATION FOR USE

SAFETY....................2-1

LINE VOLTAGE AND POWER

CORD .....................2-1

LINE FUSE .................2-1

INSTRUMENT COOLING . .....2-2

START-UP..................2-2

DETAILED OPERATING INFORMATION...............2-2
Section 3 THEORY OF OPERATION

SECTION ORGANIZATION .....3-1

INTEGRATED CIRCUIT

DESCRIPTIONS ..............3-1

BLOCK DIAGRAM

DESCRIPTION .................3-1

INTRODUCTION..............3-1
VERTICAL INPUTS

(Diagram 1) ............... 3-1

VERTICAL PREAMPS AND OUTPUT AMPLIFIER

(Diagram 2) ............... 3-2

A AND B TRIGGER SYSTEM

(Diagram 3) ............... 3-2

DISPLAY AND TRIGGER LOGIC AND PROCESSOR INTERFACE

(Diagram 4) ............... 3-3

A AND B SWEEPS AND DELAY COMPARATORS

(Diagram 5) ............... 3-4

HORIZONTAL OUTPUT

AMPLIFIER (Diagram 6)...... 3-4

Z-AXIS, CRT, PROBE ADJUST,

AND CONTROL MUX

(Diagram 7) ............... 3-4

MEASUREMENT PROCESSOR

(Diagram 8) ............... 3-5

READOUT SYSTEM

(Diagram 9) ............... 3-5

SWITCH BOARD AND INTERFACE

(Diagram 10) .............. 3-6

ADC AND DAC SYSTEM

(Diagram 11) .............. 3-6

POWER SUPPLY

(Diagram 12) .............. 3-6

DETAILED CIRCUIT DESCRIPTION 3-6 VERTICAL INPUTS

(Diagram 1) ............... 3-6

VERTICAL PREAMPS AND OUTPUT

AMPLIFIER (Diagram 2)...... 3-9

A AND B TRIGGER SYSTEM

(Diagram 3) .............. 3-12

DISPLAY AND TRIGGER LOGIC AND PROCESSOR INTERFACE (Diagram
4) .............. 3-16

A AND B SWEEPS AND DELAY COMPARATORS

(Diagram 5) ...............3-31

HORIZONTAL OUTPUT AMPLIFIER

(Diagram 6) ...............3-37

Z-AXIS, CRT, PROBE ADJUST,

AND CONTROL MUX

(Diagram 7) ...............3-38

MEASUREMENT PROCESSOR

(Diagram 8) ...............3-42

READOUT SYSTEM

(Diagram 9) ...............3-45

SWITCH BOARD AND

INTERFACE (Diagram 10) ----3-51

ADC AND DAC SYSTEM

(Diagram 11) ..............3-52

POWER SUPPLY

(Diagram 12) ..............3-53

MAIN BOARD POWER DISTRIBUTION

(Diagram 13) ..............3-58

PROCESSOR POWER BOARD DISTRIBUTION (Diagram 14) . . 3-58
INTERCONNECTION DIAGRAM (Diagram 15) ..............3-58
PERFORMANCE CHECK PROCEDURE

INTRODUCTION................4-1

TEST EQUIPMENT REQUIRED . . 4-1 PERFORMANCE CHECK

INTERVAL..................4-1

PREPARATION...............4-1

INDEX TO PERFORMANCE

CHECK PROCEDURE .........4-4

DISPLAY .....................4-5

TRACE ROTATION ...........4-5

GEOMETRY.................4-5
VERTICAL ................... 4-6

Input COUPLING Functional

Check .................... 4-6

CH 1 and CH 2 VOLTS/DIV

Trace Shift ................ 4-6

CH 3 and CH 4 VOLTS/DIV

Trace Shift ................ 4-7

CH 1 and CH 2 VAR VOLTS/DIV

Trace Shift ................ 4-7

CH 1 and CH 2 Input

COUPLING Trace Shift....... 4-7

CH 2 INVERT Trace Shift..... 4-7

CH 1 and CH 2 VAR

VOLTS/DIV Range .......... 4-7

Low-Frequency Linearity..... 4-8

CH 1 and CH 2 Vertical Deflection Accuracy......... 4-8

Ch 3 and CH 4 Vertical Deflection Accuracy......... 4-8

ADD Mode and CH 2 INVERT

Deflection Accuracy......... 4-9

Vertical POSITION Range

(all channels) .............. 4-9

CH 1 to CH 2 Signal

Delay Match .............. 4-10

CH 1 to CH 4 Signal

Delay Match .............. 4-10

CH 3 to CH 4 Signal

Delay Match .............. 4-10

CH 1 and CH 2 Vertical Bandwidth ................ 4-10

CH 3 and CH 4 Vertical Bandwidth ................ 4-11

CH 1 and CH 2 Aberrations . 4-11 SCOPE BW (Bandwidth

Limit) Accuracy ........... 4-11

Common-mode Rejection

Ratio .................... 4-12

Channel Isolation .......... 4-12

AC-Coupled Lower -3 dB

Point .....................4-13

Vertical ALT and CHOP

Modes....................4-13

BEAM FIND Functional

Check....................4-13

A and B Trace

Separation ................4-13

TRIGGERING ................. 4-14

500 Hz Trigger

Sensitivity.................4-14

500 kHz Trigger

Sensitivity.................4-15

25 MHz Trigger

Sensitivity.................4-15

100 MHz Trigger

Sensitivity.................4-15

100 MHz NOISE REJ

Trigger Sensitivity ..........4-16

Single Sweep Mode.........4-16

Trigger LEVEL Control

Range ....................4-16

TV Field Trigger

Sensitivity.................4-17

TV Line Trigger

Sensitivity.................4-17

Line Trigger Functional

Check....................4-17

HORIZONTAL ................4-18

A and B Sweep Length......4-18

Horizontal POSITION

Range ....................4-18

VAR SEC/DIV Range ........4-18

Magnifier Registration .......4-19

A and B Timing Accuracy

and Linearity...............4-19

A and B Magnified Timing

Accuracy ................. 4-19

Delay Time Jitter ...........4-20

Delay Time Accuracy .......4-21
Delay Time Position

Range ................... 4-21

X-Axis Gain Accuracy...... 4-21

X-Y Phase Difference...... 4-22

X-Axis Bandwidth.......... 4-22

TIME AND CURSORS

MEASUREMENTS ............ 4-23

h- SEC -H and K- 1/SEC-M

Cursor Accuracy .......... 4-23

Delta Time Accuracy....... 4-23

k- phase ->| Cursor

Accuracy................. 4-24

K- VOLTS -H Cursor

Accuracy................. 4-24

ib volts -H Cursor

Accuracy................. 4-24

Tracking Cursors Position

Accuracy................. 4-24

CH1/CH2 VOLTMETER

MEASUREMENTS ............ 4-25

DC Volts Accuracy......... 4-25

DC Volts Normal Mode

Rejection Ratio............ 4-25

+Peak, -Peak, Peak-to-Peak

Volts Accuracy............ 4-26

25 MHz +Peak, -Peak, and Peak-to-Peak Volts

Accuracy................. 4-26

100 MHz +Peak, -Peak, and Peak-to-Peak Volts

Accuracy................ . 4-26

Gated Volts Accuracy ...... 4-26

EXTERNAL Z-AXIS, PROBE ADJUST AND FRONT-PANEL

SETUP FUNCTIONS........... 4-28

Check External Z-Axis

Input .................... 4-28

PROBE ADJUST Output ..... 4-28

Run MAKE FACTORY SETTINGS Routine .................. 4-28
ADJUSTMENT PROCEDURE
INTRODUCTION ................5-1

PURPOSE .................. 5-1

TEST EQUIPMENT

REQUIRED..................5-1

LIMITS AND TOLERANCES.....5-1

PARTIAL PROCEDURES.......5-1

INTERNAL ADJUSTMENTS AND ADJUSTMENT INTERACTION ... 5-1
PREPARATION FOR

ADJUSTMENT...............5-3

INDEX TO ADJUSTMENT

PROCEDURE................5-3

POWER SUPPLY, DISPLAY,

AND Z-AXIS..................5-4

INITIAL CONTROL

SETTINGS ..................5-4

PROCEDURE................5-4

Power Supply DC Levels

(R2252).................... 5-4

Grid Bias (R2719) ...........5-5

Astigmatism (R2788)......... 5-5

Trace Rotation (Front Panel) . . 5-5 Geometry
(R2784)........... 5-5
Z-Axis Response (C2704) on instruments with serial numbers
of below B110100 for the 2246
MOD A or below B710100

for the 2246 1Y .............5-5

Readout Jitter (R724) ........ 5-6

VERTICAL....................5-7

INITIAL CONTROL

SETTINGS ..................5-7

PROCEDURE................5-7

Vertical Output Gain (R703) and Readout Vertical Centering
(R260) . .................... 5-7

CH 1 Step Balance (R12) .....5-7

CH 2 Step Balance (R22) ____.5-8
CH 3 Step Balance (R141) ... 5-8

CH 4 Step Balance (R161) ... 5-8

CH 1 MF/LF Gain (R13) and Compensation (C1) ......... 5-8

CH 1 Input Capacitance (C114) 5-8

CH 1 Input Compensation X10 (C11)..................... 5-8

CH 1 Input Compensation X100 (C10)............... 5-8

CH 1 Gain (R211) .......... 5-8

CH 2 MF/LF Gain (R23) and Compensation (C2) ......... 5-8

CH 2 Input Capacitance (C124) 5-9

CH 2 Input Compensation

X10 (C21 )................. 5-9

CH 2 Input Compensation

X100 (C20)................ 5-9

CH 2 Gain (R221) .......... 5-9

CH 3 MF/LF Compensation (C134).................... 5-9

CH 3 Gain (R231) .......... 5-9

CH 4 MF/LF Compensation (C154).................... 5-9

CH 4 Gain (R241) .......... 5-9

Delay-line HF Compensation (R272, R273, R275, C274,

C273) ................... 5-10

CH 3 HF Compensation

(C138)................... 5-10

CH 4 HF Compensation

(C158)................... 5-10

CH 1 and CH 2 Bandwidth Check ................... 5-10

CH 3 and CH 4 Bandwidth

Check ......................................5-11

HORIZONTAL................................5-12

INITIAL CONTROL

SETTINGS ................................5-12

PROCEDURE ............................5-12

Horizontal X1 Gain (Timing)

(R826)................... 5-12
Horizontal X10 Gain (Tinning)

(R825) .................... 5-12

Readout Horizontal Gain (R823) and MAG Registration (R809) .
5-12

A 0.5 p.s Timing (C314) .....5-13

B 0.5 |xs Timing (C329) ..... 5-13

2-5 ns Timing (C807, C814) . 5-13

X Gain (R827) ............. 5-13

MEASUREMENT BANDWIDTH AND

SELF CHARACTERIZATION .....5-14

INITIAL CONTROL

SETTINGS .................5-14

PROCEDURE...............5-14

Volts Cal (R920) ........... 5-14

B Trigger Bandwidth (R455) . . 5-14 Self
Characterization........5-14
CORRECTIVE MAINTENANCE . . .	6-34

INTRODUCTION........................6-34

MAINTENANCE

PRECAUTIONS..........................6-34

OBTAINING REPLACEMENT

PARTS......................................6-34

REPACKAGING FOR

SHIPMENT................................6-35

MAINTENANCE AIDS ..............6-35

INTERCONNECTIONS ..............6-35

BATTERY..................................6-37

TRANSISTORS AND

INTEGRATED CIRCUITS ..........6-37

SOLDERING TECHNIQUES . . .	6-37 REMOVAL AND REPLACEMENT
INSTRUCTIONS..............6-38
STATIC-SENSITIVE

COMPONENTS ................6-1

PREVENTIVE MAINTENANCE.....6-2

INTRODUCTION..............6-2

INSPECTION AND

CLEANING..................6-2

LUBRICATION ...............6-4

SEMICONDUCTOR CHECKS____6-4

PERIODIC READJUSTMENT ____6-4

TROUBLESHOOTING........... . 6-5

INTRODUCTION..............6-5

TROUBLESHOOTING AIDS.....6-5

TROUBLESHOOTING

EQUIPMENT.................6-6

TROUBLESHOOTING

TECHNIQUES ...............6-6

INTERNAL TESTING

CAPABILITIES ..............6-10

SERVICE MODE ............6-11

TROUBLESHOOTING HINTS

BY DIAGRAM ..............6-19

TROUBLESHOOTING MEASUREMENT ERRORS.............6-25
Section 7 OPTIONS

INTRODUCTION............. 7-1

INTERNATIONAL POWER

CORDS ................... 7-1

OPTION 1R RACKMOUNTED INSTRUMENT............... 7-1
Section 8 REPLACEABLE ELECTRICAL PARTS Section 9 DIAGRAMS

Section 10 REPLACEABLE MECHANICAL PARTS CHANGE INFORMATION
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