Tektronix 314 Manuale utente

Toktronix,

inc.

P.O.

[lox

500

Beaverton, Oregon

97077

314

Service

TABLE OF CONTENTS

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SECTION

SPECIFICATION

Electrical Characteristics

Vertical

Horizontal System

Triggering System

Calibrator

External Horizontal lnput

External Blanking

CRT Display System

Storage System

Power Sources

Environmental Characteristics

Physical Characteristics

SECTION

OPERATING INFORMATION

Preliminary Information

Safety lnformation

Operating Voltage

Controls and Connectors

Front Panel

Side Panel

Rear Panel

SECTION

THEORY OF OPERATION

Block Diagram

Description

Vertical Amplifier

Triggering

Sweep Generator

CRT and Power Supply

Calibrator

Circuit Operation

CH 1 Preamp and Calibrator

General

lnput Coupling

lnput Attenuator

5 Division Calibrator

lnput Stage

Preamp Stage

Preamp

General

Preamp Stage

Channel Switch

General

Diode Gates

Switching Multivibrator

Current Limiter

Delay-Line Driver

Vertical Output Amplifier

General

Delay Line

Output Amplifier

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Page

1-1

1-2

1-3

1-4

1-5

1-6

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TABLE OF CONTENTS

(cont)

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SECTION 3 THEORY OF OPERATION (cont)

Page

Trigger Source 3-9

Internal 3-9

Source and Coupling 3-9

Trigger Preamp and Sweep Generator 3-10

Trigger Preamplifier 3-10

Sweep Generator 3-10

Normal Triggered Mode 3-13

Auto-Triggered Mode 3-13

Single Sweep Mode 3-13

Sweep Magnification and Positioning 3-14

Ext Horiz 3-14

General 3-14

Input Stage 3-14

Output Stage 3-14

Horizontal Amplifier 3-14

General 3-14

Emitter-Follower Amplifier 3-14

Common-Base Amplifier 3-14

Output Amplifier and Output Inverter Amplifier 3-14

Storage 3-15

General 3-15

Storage Tube 3-15

Flood Guns and Collimation Electrodes 3-17

Target-Control Amplifier 3-17

Erase Generator 3-17

Enhance Generator 3-18

Auto Erase 3-18

Auto-Erase Generator 3-18

Sweep Reset Delay Multivibrator 3-18

Integrate 3-19

Power Supply 3-19

General 3-19

AC Power Input 3-19

Power Source Selector 3-20

Series Regulator 3-20

DC-to-DC Converter 3-20

Regulator Protection 3-20

Auto Turn Off 3-20

Low-Line Indicator 3-20

V and

-6

V Regulator 3-20

H V and Unblanking 3-20

General 3-20

High Voltage and CRT 3-20

Blanking and Unblanking 3-22

SECTION

MAINTENANCE

Preventive Maintenance 4-1

Cleaning 4-1

Visual Inspection 4-1

Semiconductor Checks 4-1

Recalibration 4-1

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314

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TABLE OF CONTENTS

(cont)

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SECTION

MAINTENANCE

(cont)

Page

Troubleshooting 4-1

Troubleshooting Chart 4-

Troubleshooting Techniques 4-4

Corrective Maintenance 4-5

Obtaining Replacement Parts 4-5

Component Removal and Replacement 4-6

Instrument Cabinet 4-6

Storage-Time/Div Module 4-6

CRT (with power supply section of instrument in

place) 4-6

Power Supply-High Voltage Section 4-7

Interface Circuit Board (Assembly A8) 4-8

Power Supply Circuit Board (Assembly A7) 4-8

H V and Unblank Circuit Board (Assembly A6) 4-9

Storage Circuit Board (Assembly A5) 4-9

Horizontal Circuit Board (Assembly A4) 4-10

Attenuator Circuit Board (Assembly Al) 4-10

Vertical Circuit Board (Assembly A2) 4-11

Trigger Switch Circuit Board (Assembly A3) 4-1

Circuit Board Pins 4-1

Circuit Board Pin Sockets 4-1

Lead-End Pin Connectors 4-13

Recalibration After Repairs 4-13

Instrument Repackaging 4-13

SECTION

PERFORMANCE CHECK/CALIBRATION

Performance Check

Introduction

Using the Procedure

lndex

Partial Procedure

Control Settings

Test Equipment Required

Special Calibration Fixtures

Calibration Equipment Alternatives

lndex to Performance Check

Power Supply and Display

Vertical System

Horizontal System

Triggering System

Storage System

Miscellaneous

Calibration Procedure

Calibration Interval

Tektronix Field Services

Using the Procedure

lndex

Calibration Procedure

Partial Procedure

lndex to Adjustment Procedure

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TABLE OF CONTENTS

(cont)

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SECTION

PERFORMANCE CHECK/CALIBRATION (cont) Page

Power Supply and Calibrator 5-18

Display 5-20

Storage 5-22

Vertical System 5-24

Horizontal System 5-28

SECTION

ELECTRICAL PARTS LIST

SECTION

DIAGRAMS

SECTION

MECHANICALPARTSLISTAND ILLUSTRATIONS

CHANGEINFORMATION

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LlST OF ILLUSTRATIONS

Figure No. Page

Sony-Tektronix 314 Storage Oscilloscope

Dimensions

Locations of controls and connectors Front Panel

Locations of controls and connectors Side Panel

Locations of controls and connectors Rear Panel

Basic Block Diagram

Preamp Circuit Block Diagram

Channel Switching Block Diagram

Signal Path, CH

Signal Path, CH 2

Vertical Output Amplifier Block Diagram

Trigger Source Block Diagram

Sweep Generator and External Horizontal Block Diagram

Horizontal Amplifier Block Diagram

Storage Block Diagram

Power Supply Block Diagram

CRT

Block Diagram

Troubleshooting Chart

Location of Power Supply Test Points

Location of Connectors

Location of Screws HoldingPowerSupply Section to Main Chassis

Location of 8-Pin Connector in Power Supply

Location of Hexagonal Spacers on Interface Board

Location of Screws Holding Heat-Sink Bracket

Location of Screws Near Focus and Intensity Controls

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REV.

AUG.

1975

Service

LIST OF ILLUSTRATIONS

(cont)

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Location of Screws on Power Supply Section 4-9

Location of Screws Holding Storage Circuit Board to Module 4-9

Location of Screws Holding Horizontal Circuit Board to Module

Assembly 4-10

Locationof Interconnectingand GroundLeadsBetweenAttenuator

and Vertical Circuit Boards 4-11

Location of Screws Holding Attenuator Circuit Board to Chassis 4-11

Location of Delay Line Leads 4-11

Location of Screws and Spacers Holding Trigger Circuit Board 4-12

Idealized Display of Risetime 5-8

Calibration Shield in place on 314 5-26

Typical display of correct adjustment of C1 or C11 5-26

Display of correct high-frequency compensation (idealized) 5-27

Typical display of external XI0attenuatorcompensation (idealized) 5-29

Semiconductor Lead Configurations

Circuit Board Locations

Adjustment Locations

Al-Attenuator Board

A2-Vertical Amplifier Circuit Board

A3-Trigger Switch Circuit Board

A4-Horizontal Circuit Board

A5-Storage Circuit Board

A7-Power Supply Circuit Board

A8-Interface Circuit Board

A6-H V and Unblanking Circuit Board

AS-Intensity Limit Circuit Board

LIST OF TABLES

Table

No.

1-1 Characteristics

2-1 Power Cord color codes

3-1 Sweep Generator IC Input-Output

4-1 Voltage and Ripple Tolerances

5-1 Test Equipment

5-2 Volts/Div Accuracy

5-3 Time/Div Accuracy (unmagnified)

5-4 Time/Div Accuracy (magnified)

5-5 Trigger Levels

5-6 Volts/Div Compensation

Page

1-1

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REV. B,

FEB.

1976

Fig.

1-1.

$my-Toktronix

314

Storb$$@

Oscilloscope.

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Section

1-314

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SPECIFICATION

The Sony-Tektronix 314 is a dual-channel, 10

megahertz, portablestorageoscilloscope.Theinstrument

isconstructed to withstand awide rangeof environmental

conditions.

Dc to 10 megahertz vertical bandwidth provides

calibrated deflection factors from 1 millivolt to 10

volts/division.

The horizontal system provides calibratedsweep rates

from 5 seconds to 1 microsecond/division and a XI0

sweep magnifier to increase the fastest sweep rate to 0.1

microsecond/division. Three sweep modes are available:

AUTO, NORM, and SINGLE SWP. The trigger circuit

provides a stable display over the full bandwidth.

External horizontal inputprovidesdeflection factors of

20 millivolts to 2 volts/division for external sweep signal.

The crt is a direct-view, bistablestorage device having

an 8xlodivisioninternalgraticule.Eachgraticuledivision

equals 0.25-inch. An enhance mode increases single-

sweep writing rate.

The internal 1 kilohertz calibrator is connected inter-

nallytothevertical inputsand to afront-panel connector.

The 314 operates from a line voltage of 100, 115, 120,

200, 230, or 240 volts ac, or from a +12- or +24-volt dc

source. The following tables contain a detailed listing of

the 314 characteristics.

TABLE

1-1

Electrical Characteristics

Deflection Factor

Characteristic

Calibrated Range

Accuracy

Uncalibrated Range

(VOLTS/DIV VARIABLE)

VERTICAL

Performance Requirement

Frequency Response

Supplemental Information

Bandwidth

Direct Coupled,

4-div reference

Capacitively Coupled,

4-div reference

Step Response

Risetime, 4-division

Step Input

1 mV to 10 V/Div

Within 3% over the calibrated range

Continuously variable between calibrated

deflection factor settings. Extends

highest deflection factor to at

least 25 V/Div.

13 steps in a 1-2-5 sequence

REV.

A. AUG.

1977

1 mV to 10 V/Div with

VARIABLE at CAL

1 mV to 10 V/Div with

VARIABLE at CAL

Without Probe

At least

10 MHz

10 Hz or less

to at least

10 MHz

36 ns or less

With P6149 Probe

At least

10 MHz

1 Hz or less to

at least

10 MHz

1 mV to 10 V/Div

Specification-31

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TABLE

1-1

(cont)

Capacitively Coupled (AC)

Supplemental Information

Characteristic

Maximum Input Voltage

Direct Coupled (DC)

lnput R and C

Resistance

Performance Requirement

Without Probe

With P6149 Probe

1 Mn,within 2% 10 Mn,within 2%

300 V, dc plus

peak ac

Capacitance

47 pF. within 4 pF 13.5 pF or less

500 V, dc plus

peak ac

Signal Delay Permits viewing leading edge of

waveform that initiates trigger

HORIZONTAL SYSTEM

Chopped Repetition Rate

Sweep Time/Div

Calibrated Range

Accuracy

Unmagnified

5 s to 0.5 s/Div

0.2 s to 1ps/Div

Magnified

0.5 s to 50 ms/Div

20 ms to 0.5 ps/Div

0.2 ps and

0.1 pslDiv

TIME/DIV Variable

1-2

Approximately 100 kHz

5 s to 1ps/Div. XI0 magnifier

extends sweep time/div to 0.1 ps

Within 4% over center

graticule

divisions. Within 5% over any