2246 1Y and 2246 Mod A Service
TABLE OF CONTENTS
Page
Page
LIST OF ILLUSTRATIONS....................................... vi
LIST OF TABLES ........................................................ vii
OPERATORS SAFETY SU M M A R Y ...................... viii
SERVICING SAFETY SUMMARY .......................... ix
Section 1
SPECIFICATION
INTRODUCTION.............................. 1-1
STANDARD ACCESSORIES___ 1-1
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
REV OCT 1991
i
Summary of Contents for 2246 1Y
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