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465
Instruction manual
Tektronix 465 Instruction Manual
Wth options, sn b250000 & up
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Instruction manual
(50 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
List of Illustrations
List of Tables
Product View
Specifications
Vertical Deflection System
Triggering
Deflection Factor
Introduction
Horizontal Deflection System
X-Y Operation
Calibrated Sweep Range/Accuracy
Delay or Differential Time Jitter
Z-Axis Input
Signal Outputs
Supplemental Information
Calibrator
Power Source
Cathode Ray Tube (Crt)
Vertical Deflection System
Calibrator
External Z-Axis Input
Output Resistances
Cathode Ray Tube (CRT)
Triggering
Horizontal Deflection System
Operating Information
Instrument Repackaging
Operating Voltage
Regulating Ranges
Introduction
Controls and Connectors
Cathode Ray Tube (CRT) and Display
Power Supply Regulating Range Selector
Introduction
Vertical Deflection System
Front and Rear Panel Controls and Connectors
Operating Informatlon
A and B Triggering
A and B Sweep
Obtaining Basic Displays
Calibrator and Power
Rear Panel
Normal Sweep Display
Introduction
Magnified Sweep Display
Delayed Sweep Display
Mixed Sweep Display
X-Y Display
Circuit Description
Block Diagram
Digital Logic
Introduction
Basic Block Diagram of the 465
Channel 1 Preamp
Detailed Block Diagram of the Channel 1 Preamplifier
Introduction
Scale-Factor Switching Circuit
Input Coupling
Input Attenuator
Source Follower
Channel 2 Preamp
First Cascode Amplifier
Second Cascode Amplifier
Introduction
Third Cascode Amplifier
Diode Gates
Detailed Block Diagram Ol the Channel 2 Preamplifier
Vertical Switching Circuit
Introduction
Switching Multlvlbrator
Channel 2 Display Only
Alternate Trace Display
Detailed Block Diagram of the Vertical Switching Circuit
Diode Gates
Chopped Mode Operation
Effect of Diode Gates on Signal Path
Added Mode Operation
Delay -Line Driver
Reference Feedback Amplifier
Normal Trigger Pickoff
Introduction
Vertical Output Amplifier-Discrete Version
A and B Trigger Generators
Vertical Output Amplifier-IC Version
Trigger Source
Input Source Follower
Introduction
Trigger Coupling
Paraphase Amplifier
A and B Sweep Generator
Tunnel Diode Driver
Detailed Block Diagram of the a Sweep Generator
Introduction
Disconnect Amplifier
Sawtooth Generator
Output Buffer Amplifier
Sweep Start Amplifier
Logic Multivibrator
Sweep and Z Axis Logic Circuit
Sweep Control Integrated Circuit
Introduction
A Sweep Gate
B Sweep Gate
Holdoff Timing
A Sweep Holdoff Amplifier
B Sweep Holdoff Amplifier
B Sweep Latch
A Sweep Z Axis Gate
B Sweep Z-Axis Gate
A + Gate and B - Gate Emitter Followers
X- Axis Amplifier
Horizontal Amplifier
Introduction
Input Paraphase Amplifier
Gain Setting Amplifier
Output Amplifier
Detailed Block Diagram of the Horizontal Amplifier
CRT Circuit
Detailed Block Diagram of the CRT and Z-Axis Circuits
Introduction
High Voltage Oscillator
CRT Control Circuits
High Voltage Regulator
High Voltage Rectifier and Output
Z Axis Ampliflfer
DC Restorer Circuit
Multlvibrator
Detailed Block Diagram of the Calibrator Circuit
Introduction
Output Amplifier
A Trigger View Amplifier
Power Input
Secondary Circuit
Introduction
Low Voltage Power Supply
Detailed Block Diagram of the Low Voltage Power Supply
Fan Motor Circuit
Foldover Circuit Action
Preventive Maintenance
Cabinet Removal
Cleaning
Introduction
Visual Inspection
Switch Contacts
Exterior
Crt
Troubleshooting
Recalibration
Troubleshooting Aids
Troubleshooting Charts
Lubrication
Semiconductor Checks
Introduction
Color Codes
Troubleshooting Equipment
Troubleshooting Techniques
Capacitor Markings
Diode Color-Code
Check Instrument Calibration
Isolate Trouble to a Circuit
Check Voltages and Waveforms
Check Individual Components
Corrective Maintenance
Obtaining Replacement Parts
Repair and Readjust the Circuit
Standard Parts
Introduction
Soldering Techniques
Special Parts
Ordering Parts
Component Removal and Replacement
Circuit Boards
Vertical Preamp Assembly
Trigger Generator and Sweep Logic Circuit Board
Sweep Timing Circuit Board
Power Transformer
Cathode Ray Tube
High Voltage Multiplier
Transistors and Integrated Circuits
Interconnecting Pins
Recalibration after Repair
Ceramic Terminal Strips
Instrument Repackaging
Index to Performance Check
Equipment Required
Test Equipment Alternatives
Purpose
Limits and Tolerances
Line Voltage Selection
Special Fixtures
Triggers
Horizontal
Vertical
Control Settings
Check Trace Rotation
Check Alternate/Chop Mode
Check Ch 1 Balances
Check Ch 2 Balances
Check Position Range and Centering
Check Beam Finder Operation
Check Ch 1 and Ch 2 Deflection Factor
Check Ch 1 and CH 2 Variable Volts/Division Range
Check Output Amplifier Low Frequency Compensation
Check Ch 1 and Ch 2 Volts/Division Compensation
Check Ch 1 and Ch 2 Transient Response
Check Ch 1 and Ch 2 Bandwidth
Check Cascade Gain and Bandwidth
Check a and B Internal Triggering
Triggers
Check a and B External Triggering
Check a Normal Mode
Check Single Sweep
Check Trigger View
Check a and B Timing Accuracy
Horizontal
Check a Variable Time/Division Range
Check Delay or Differential Time Linearity
Check Delay or Differential Time Accuracy
Check Delay or Differential Jitter
Check Mixed Sweep Accuracy
Check a Intensified and B Ends a
Check X Gain
Check X Bandwidth
Calibration
Limits and Tolerances
Calibration Equipment Alternatives and Partial Procedures
Interactions
Purpose
Step Titles
Line Voltage Selectlon
Internal Adjustments
Display
Test Equipment Required
Adjustment Interactions
Test Equipment Required
Index to Calibration Procedure
Power Supply
Check/Adjust Power Supply DC Levels, Regulation and Ripple
Low Voltage Power Supply Limits
Check/Adjust High Voltagte Supply
Typical Low Voltage Power Supply Ripple
Display and Z Axis
Check/Adjust CRT Grid Blas
Check/Adjust Trace Alignment
Check/Adjust Y-Axis Alignment
Check/Adjust Geometry
Check/Adjust Z-Axis Compensation
Vertical
Check Probe Coding Indicator Lights
Check Ch 1 and Ch 2 Gate Current
Check AC-GND-DC Switches
Check Alternate Mode
Adjust Output Amplifier Bias
Check/Adjust Vertical Output Centering and Beam Finder
Check/Adjust Ch 1 Step Attenuator Balance
Check/Adjust Ch 1 Variable Volts Division Balance
Check/Adjust Ch 2 Step Attenuator Balance
Check/ Adjust Ch 2 Variable Volts/Division Balance
Check/Adjust Ch 2 Invert Balance
Check/Adjust CH 2 Position Centering
Check/Adjust Ch 1 and Vertical Output Gain
Check/Adjust Ch 2 Gain
Check Ch 1 Ch 2 Variable Volts/Division Range
Vertical Deflection Factor
Check Add Mode
Check Compression and Expansion
Check/Adjust Vertical Output Low Frequency Compensation
Check/ Adjust Ch 1 Volts/Division Compensation
Check/Adjust Ch 2 Volts/Division Compensation
Check/Adjust Ch 2 and Vertical Output High Frequency Compensation
Check Ch 2 Position Effect
Check/Adjust Ch 2 10 MV and 20 MV High Frequency Compensation
Check/Adjust Ch 1 High Frequency Compensation
Check Ch 1 Position Effect
Check/Adjust Ch 1 10 MV and 20 MV High Frequency Compensation
Check Bandwidth
Check Cascaded Gain and Bandwidth
Check Channel Isolation
Check Common-Mode Rejection Ratio
Check Bandwidth Limit Operation
Check/Adjust a Trigger Sensitivity and Triggered Lamp
Triggers
Check/Adjust B Trigger Sensitivity
Check/Adjust B Trigger Slope and Level Centering
Check/Adjust a Trigger Slope and Level Centering
Check/Adjust a Trigger DC Levels
Check B Trigger DC Levels
Check B Internal 25 Megahertz Triggering
Check a Internal 25 Megahertz Triggering
Check a External 25 Megahertz Triggering
Check B External 25 Megahertz Triggering
Check Band a External 100 Megahertz Triggering
Trigger Coupling
Check a Internal 100 Megahertz Triggering
Check B Internal 100 Megahertz Triggering
Check a and B High Frequency Reject Triggering
Check 60 Hertz Internal Triggering
Check 60 Hertz External Triggering
Check a and B External Trigger Level Ranges
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Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077
070-1861
-00
TEKTRONIX
465
OSCILLOSCOPE
WITH OPTIONS
(SN B250000
&
UP)
SERVICE
INSTRUCTION
MANUAL
First Printing
AUG 1974
REPRINTED
JULY
1975
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Troubleshooting
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