Tektronix AM-6786U Technical Manual

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TM 11-6625-2749-14&P

OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT

MAINTENANCE MANUAL

(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)

FOR

DIFFERENTIAL AMPLIFIER AM-6786/U

(TEKTRONIX TYPE 7A22, VERTICAL PLUG-IN UNIT)

(NSN 6625-00-478-0597)

HEADQUARTERS,

DEPARTMENT OF THE ARMY

OCTOBER 1979

CLEANING THE INTERIOR

Use an eye-shield when cleaning with pressurized air. Hardened dirt can be removed with a paint brush, cotton tipped swab or cloth dampened with a water and mild detergent solution. Avoid the use of chemical cleaning agents that might damage the plastic parts.

SPECIFIC COMPONENT REPLACEMENT INFORMATION

Disconnect the instrument from the power source before removing or replacing components.

The pushbutton switches are not repairable and should be replaced if defective. Components which are mounted on the circuit board associated with the pushbutton switch can be replaced using the normal replacement procedure. See the information under Light-Bulb Replacement for bulb replacement.

TM 11-6625-2749-14&P

This manual contains copyright material reproduced by permission of Tektronix, Incorporated.

TECHNICAL Manual

HEADQUARTERS

DEPARTMENT OF THE ARMY

No. 11-6625-2749-14&P

OPERATOR’S, ORGANIZATIONAL, DIRECT

MAINTENANCE

SUPPORT,

MANUAL

Washington, DC,

AND GENERAL SUPPORT

10 October

1979

(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)

FOR

DIFFERENTIAL AMPLIFIER AM-6786/U

(TEKTRONIX TYPE 7A22, VERTICAL PLUG-IN UNIT)

NSN 6625-00-478-0597)

Current as of 20 March 1979

REPORTING OF ERRORS

You can improve this manual by recommending improvements using DA Form 2028-2 located in the back of the manual. Simply tear out the self-addressed form, fill it out as shown on the sample, fold it where shown, and drop it in the mail.

If there are no blank DA Forms 2028-2 in the back of your manual, use the standard DA Form 2028 (Recommended Changes to Publications and Blank Forms) and forward to the Commander, US Army Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME -MQ, Fort Monmouth, NJ 07703.

In either case, a reply will be furnished direct to you.

This manual is an authentication of the manufacturer’s commercial literature which, through usage, has been found to cover the data required to operate and maintain this equipment. Since the manual was not prepared in accordance with military specifications, the format has not been structured to consider levels of maintenance.

i-0.1

TM 11-6625-2749-14&P

TABLE OF

SECTION O

Introduction . . . . . . . . . . . . . . . . . . .

SECTION 1 SPECIFICATION

Introduction . . . . . . . . . . . . . . . . . . . .

Electrical Characteristics . . . . . . . . . . .

Deflection Factor . . . . . . . . . . . . . . .

Gain . . . . . . . . . . . . . . . . . . . . . . . .

Differential Dynamic Range . . . . . .

DC Offset . . . . . . . . . . . . . . . . . . . .

Frequency Response . . . . . . . . . . . .

Bandwidth limit . . . . . . . . . . . . . . .

Recovery Time . . . . . . . . . . . . . . . .

Common-Mode Signal Range . . . .

Common-mode Rejection Ratio . . . .

Maximum input Voltage . . . . . . . .

Input Rand C . . . . . . . . . . . . . . . . .

Maximum Input Gate Current . . . .

Variable Balance . . . . . . . . . . . . . .

Step Attenuator DC Balance . . . . . .

Displayed Noise

(Tangentially Measured) . . . . . . .

DC Drift . . . . . . . . . . . . . . . . . . . . .

Isolation between + and — Inputs

Environmental Characteristics . . . . . . .

Altitude . . . . . . . . . . . . . . . . . . . . .

Transportation . . . . . . . . . . . . . . . .

Physical Characteristics . . . . . . . . . . . .

Finish . . . . . . . . . . . . . . . . . . . . . . .

Dimensions . . . . . . . . . . . . . . . . . . .

Weight . . . . . . . . . . . . . . . . . . . . . .

SECTION 2 OPERATING INSTRUC-

TIONS

Introduction . . . . . . . . . . . . . . . . . . . . 2-1

Front Panel Controls and Connectors . 2-1

Operating Instructions . . . . . . . . . . . . . 2-2

First Time Operation . . . . . . . . . . . 2-2

General Operating Information . . . . . 2-4

Trace Drift . . . . . . . . . . . . . . . . . . . .

Page

0-1

1-1 1-1 1-1 1-1 1-1 1-1 1-1

1-1 1-1 1-1 1-1

1-3 1-3 1-3 1-3 1-3

1-3

1-3 1-3 1-3 1-3

1-3

2-4

CONTENTS

Input Gate Current . . . . . . . . . . . . .

Voltage Measurement . . . . . . . . . . .

Signal Input Connectors . . . . . . . . .

High Input Impedance . . . . . . . . . . .

Display Polarity . . . . . . . . . . . . . . .

Deflection Factor . . . . . . . . . . . . . .

Bandwidth Selection . . . . . . . . . . . .

Voltage Comparison Measurements 2-10

Differential Operation . . . . . . . . . . 2-10

DC Offset Operation . . . . . . . . . . . . 2-11

Input Overdrive Indicator . . . . . . . . 2-12

Readout . . . . . . . . . . . . . . . . . . ...2-12

Trace Identify . . . . . . . . . . . . . . . 2-13

SECTION 3 CIRCUIT DESCRIPTION

Introduction . . . . . . . . . . . . . . . . . . . . 3-1

Block Diagram Description . . . . . . . . . 3-1

Input Coupling . . Input Attenuators

Preamp . . . . . . . .

L F -3 dB Point . Output Amplifier

H F -3 dB Point

General Information

Feedback Amplifiers . . . . . . . . . . . . 3-2

Differential Configuration . . . . . . . 3-3

Detailed Circuit Description . . . . . . . . 3-3

Input Coupling . . . . . . . . . . . . . . . . 3-3

Input Attenuators . . . . . . . . . . . . . . 3-4

Gate Current Compensation . . . . . . 3-4

Input Amplifier . . . . . . . . . . . . . . . . 3-4

X15 Preamp . . . . . . . . . . . . . . . . . 3-4

DC Balance . . . . . . . . . . . . . . . .

Floating Power Supply . . . . . . . . 3-5

Common-Mode Rejection . . . . . . 3-5

Cross Neutralization . . . . . . . . . . 3-6

. . . . . . . . . . . . . .

. . . . . . . . . . . . . . 3-2

. . . . . . . . . . . . . .

‘age

2-4 2-4 2-4 2-5 2-5

2-5 2-5

3-1 3-1

3-1 3-1 3-2

3-2

3-4

TM 11-6625-2749-14&P

TABLE OF

Input Overdrive Protection . . . . . 3-7

DC Off set . . . . . . . . . . . .

Offset Generator . . . . . .

Input Overdrive Indicator LF

-3 dB Point Selector

Output Amplifier . . . . . . . .

Gain Switching Amplifier Variable Output Stage . . . Signal Output Amplifier . Trigger Output Amplifier .

Indicator Oscilloscope Readout . . . . 3-11

Probe Sensing . . . . . . . . . . . . . . . 3-11

Trace Identify . . . . . . . . . . . . . .

SECTION 4 MAINTENANCE

Introduction . . . . . . . . . . . . . . . . . . . .

Preventive Maintenance . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . .

Cleaning Front Panel . . . . . . . . . . . .

Cleaning Interior . . . . . . . . . . . . . . .

Visual Inspection . . . . . . . . . . . . . .

Transistor Checks . . . . . . . . . . . . . .

Calibration . . . . . . . . . . . . . . . . . . .

Corrective Maintenance . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . . . . .

Obtaining Replacement Parts . . . . .

Special Parts . . . . . . . . . . . . . . . . . .

Soldering Techniques . . . . . . . . . . .

Component Replacement Information

Troubleshooting . . . . . . . . . . . . . . . . .

Introduction . . . . . . . . . . . . . . . . . .

Indicator Oscilloscope . . . . . . . . . . .

Operating Procedure and

Control Settings . . . . . . . . . . . . .

Trouble Symptoms Visual Inspection . Calibration Check

. . . . . . . . . . . . . . 4-4

. . . . . . . . . . . . . .

. . . . . . 3-7

. . . . . . 3-8

. . . . . . 3-9

. . . . . .

. . . . . . 3-9

. . . . . .

. . . . . . 3-11

Page

3-9

3-11 3-11

3-11

4-1 4-1 4-1 4-1 4-1 4-1 4-1 4-1 4-1 4-1 4-2 4-2 4-2 4-3 4-3 4-3 4-4

4-4

CONTENTS

Detailed Troubleshooting . . . . . . . . . . 4-4

General . . . . . . . . . . . . . . . . . 4-4

Test Equipment Recommended . . . . 4-4

DC Balance Check . . . . . . . . . . . . .

Troubleshooting by Direct

Replacement . . . . . . . . . . . . . . . . 4-5

Component Checks . . . . . . . . . . . . . 4-6

Transistors . . . . . . . . . . . . . . . . .

Diodes . . . . . . . . . . . . . . . . . . . . 4-6

Resistors . . . . . . . . . . . . . . . . . . . 4-6

Capacitors . . . . . . . . . . . . . . . . . 4-7

SECTION 5 PERFORMANCE CHECK/

CALIBRATION PROCEDURE

Introduction . . . . . . . . . . . . . . . . .

Test Equipment Required . . . . . . . .

General . . . . . . . . . . . . . . . . . .

Short Form Procedure . . . . . . . . . .

Performance Check/Calibration

Procedure . . . . . . . . . . . . . . . . .

General . . . . . . . . . . . . . . . . . .

Preliminary . . . . . . . . . . . . . . . .

Check or Adjust . . . . . . . . . . . .

AC Atten Balance . . . . . . . . .

Variable Balance . . . . . . . . .

Coarse DC Balance. . . . . . .

+ Gate Current Zero . . . . .

- Gate Current Zero . . . .

GAIN . . . . . . . . . . . . . . . . . .

VARIABLE Control Ratio . . VOLTS/DIV Gain Switching .

Isolation between + and -

Inputs . . . . . . . . . . . . . . . .

Total DC Offset Range . . . . .

C241 + Cross Neutralization C141 - Cross Neutralization Cl 15 Xl +Input Atten Time

Constant . . . . . . . . . . . . . .

. . . 5-1

. . . 5-1 . . .

. . . 5-2

,.. . . . 5-3

. . . 5-3 . . . 5-4 . . . 5-4 . . . 5-4 . . . 5-4 . . . . . . 5-5 . . . 5-5 . . . 5-5 . . . 5-5

. . . 5-7 . . . 5-7 . . . 5-7 . . . 5-8

. . . 5-8

Page

4-4

4-6

5-1

5-3

5-5

TABLE OF CONTENTS

TM 11-6625-2749-14&P

Page

C215 x1

Constant . . . . . . . . . . . . . . . . . 5-8

Input Atten Accuracy . . . . . . . . . 5-9

Input Atten Differential Balance . 5-9

+ Input Atten

- Input Atten Time

Series

Compensation . . . . . . . . . . . . . 5-10

- Input

-input

Atten Compensation . . . 5-10

Atten Shunt

Compensation . . . . . . . . . . . . . 5-11

HF -3dB Point . . . . . . . . . . . . 5-12

-3dB Point . . . . . . . . . . . . . . . . . . . . . . .5- 12

CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .5-13

Input Overdrive Indicator . . . . . . 5-13

Differential Dynamic Range . . . . 5-14

Overall Noise Level

(Measured Tangentially) . . . . . 5-15

Overdrive Recovery Time . . . . . . 5-15

SECTION 10 CALIBRATION TEST EQUIPMENT REPLACEMENT

APPENDIX A. REFERENCES

SECTION 6 ELECTRICAL PARTS LIST

Abbreviations and Symbols

Parts Ordering Information Index of Electrical Parts List Electrical Parts List

SECTION 7 DIAGRAMS AND ME-

CHANICAL PARTS ILLUSTRATIONS

Diagrams

Mechanical Parts Illustrations

SECTION 8 MECHANICAL PARTS LIST

Mechanical Parts list Information

Index of Mechanical Parts Illustrations

Mechanical Parts List

SECTION 9 PART NUMBER-NATIONAL STOCK NUMBER CROSS REFERENCE

INDEX.

A - 1

COMPONENTS

B. C. ADDITIONAL AUTHORIZATION LIST (Not Applicable) D. MAINTENANCE ALLOCATION

Section I. General

Maintenance Allocation Chart for Differential Amplifier

II.

AM-6786/U

III.

Tool and Test Equipment Requirements for Differential

Amplifier AM-6786/U

APPENDIX E.

EXPENDABLE SUPPLIES AND MATERIALS LIST (Not Applicable)

OF END ITEM LIST (Not Applicable)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D-1

D-4

D-5

iii

TM 11-6625-2749-14&P

LIST OF ILLUSTRATIONS

Figure

1-1 1-2

2-1

2-2 2-3

2-4A

2-4B

2-5

Page

Type 7A22 Differential Amplifier. . . . . . . . . . . . . . . . .

CMRR vs Frequency for signal not exceeding Common Mode

Signal Range . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

Signals applied to the + INPUT Connector Produce an

Upright Display, while signals applied to the - INPUT

are inverted . . . . . . . . . . . . . . . . . . . . . . . . . .

Location of AC ATTEN BAL Control . . . . . . . . . . . . . . . .

2-1 2-3

Location of wire strap between input line and internal

gate . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5

7A22 CMRR at 10 uV/Div to 10 mV/Div. Inputs DC Coupled.

Worst-case degradation due to source resistance . . . . . . . .

2-6

7A22 Bandwidth and VOLTS/DIV Error as functions of Source

Resistance . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7

7A22 FREQUENCY RESPONSE as a function of LF -3 dB POINT

SETTING (HF-3 dB POINT at l MHz) . . . . . . . . . . . . .

2-8

2-6

2-7 2-8

2-9 3-1

3-2 3-3 3-4 3-5 3-6 3-7

7A22 FREQUENCY RESPONSE as a function of HF -3 dB POINT

settings (LF -3 dB POINT of DC).

. . . . . . . . . . . . . . . . . . . . . . .

Improving signal-to-noise ratio by setting bandwidth . . . . .

2-9 2-10

Waveforms showing differential rejection of a common-mode

signal

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting a differential amplifier across a circuit . . . . .

2-11 2-12

Generalized feedback system showing the relation between

input and output . . . . . . . . . . . . . . . . . . . . . .

Feedback amplifier (Single-ended version).

. . . . . . . . . . . . . . .

Feedback amplifier (Differential configuration). . . . . . . . . .

Gate Current Compensation . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Common-mode Rejection using floating power supply . . . . . . . .

Input cross neutralization

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effects of high impedance to ground in the - INPUT . . . . . . .

3-2

3-3

3-4 3-5 3-6

3-7

TM 11-6625-2749-14&P

Figure

3-8

3-9

3-10 3-11

4-1 4-2 4-3 4-4 4-5 4-6

Page

(A) Overdrive Protection System showing current paths.

(B, C) Sequence of events leading to excessive

overdrive

Offset system showing (A) Conditions with zero offset, (B)

0.25V DC offset Functional arrangement of the offset generator Partial Low Frequency -3 dB Point selector for + Input

amplifier

Removing or replacing component on circuit board

Transistor junction-voltage measurements Transistor base pin and socket arrangement

Diode polarity and color code Color code for resistors and ceramic capacitors

Plain circuit board (components)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . .

. . . . . . . . . . .

. . . . . . . . .

. . . . . . . . . .

3-8

3-9 3-10

3-11 4-2 4-6 4-7 4-8 4-8 4-10

4-7 4-8

5-1 5-2 5-3

5-4

5-5

5-6

5-7 5-8

Main circuit board (wire color code)

Bandwidth circuit board (components and wire color code) . Left side of the 7A22 showing adjustment locations Equipment required for steps 6 through 19

Typical waveform showing (A) Cross neutralization properly

adjusted, (B) incorrectly adjusted

Typical waveform showing (A) Correct adjustment of Input

Attenuator Time Constant. (B) and (C) incorrect adjustment

Typical display obtained when Input Attenuators are

adjusted for optimum differential balance

Typical display obtained with - Input attenuator adjusted

for optimum Common-Mode signal rejection. (A) C208C

adjusted properly (B) C209C adjusted properly Equipment required for steps 20 through 24 Right side of Type 7A22 showing location of adjustments . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . .

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . .

. . . . . . . . . .

. . . . . . . . . . . . . . .

4-11 4-12 5-4 5-6

5-7

5-8

5-9

5-10 5-11 5-12

TM 11-6625-2749-14&P

Figure

5-9 5-10

5-11 5-12

Page

Equipment required for step 25

. . . . . . . . . . . . . . . . . . . . . . . . . . .

5-14

Typical display showing (A) two noise bands and (B) merging

noise bands . . . . . .

Equipment required for step 26

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Typical waveform showing overdrive recovery time . . . . .

5-15 5-16 5-16

TM 11-6625-2749-14&P

Type 7A22

Fig. 1-1. Type 7A22 Differential Amplifier.

SECTION 0

INTRODUCTION

TM 11-6625-2749-14&P

0-1.

6786/U and provides instructions for operation and maintenance. Throughout this manual, the AM-6786/U is referred to as Tektronix Type 7A22 Differential Amplifier.

included is a repair parts list.

0-2.

whether there are new editions, changes, or additional publications pertaining to the equipment.

modification work orders (MWO’S) pertaining to the equipment. 0-3.

forms, records, and reports which are to be used by maintenance personnel at all maintenance levels are listed in and prescribed by TM 38-750.

DD Form 6 (Packaging Improvement Report) as prescribed in AR 700-58/NAVSUPINST

4030.29/AFR 71-13/MCO P4030.29A and DLAR 4145.8.

SCOPE

This manual describes Vertical Plug-In Unit, Differential Amplifier AM-

The maintenance allocation chart appears in appendix D. Also,

INDEXES OF PUBLICATIONS

DA Pam 310-4.

DA Pam 310-7.

FORMS AND RECORDS

Reports of Maintenance and Unsatisfactory Equipment. Maintenance

Report of Packaging and Handling Deficiencies. Fill out and forward

Refer to the latest issue of DA Pam 310-4 to determine

Refer to DA Pam 310-7 to determine whether there are

Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and for-

ward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR

55-38/NAVSUPINST 4610.33B/AFR 75-18/MCO P461O.19C and DLAR 4500.15. 0-4.

tions for preparing EIR’s are provided in TM 38-750, The Army Maintenance Management System. EIR’s should be mailed direct to Commander, US Army Communications and Electronics Materiel Readiness Command; ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ 07703.

0-5.

shall be in accordance with TM 750-244-2. 0-6.

in accordance with TM 750-244-2.

REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)

EIR’s will be prepared using DA Form 2407, Maintenance Request. Instruc-

A reply will be furnished directly to you.

ADMINISTRATIVE STORAGE

Administrative storage of equipment issued to and used by Army activities

DESTRUCTION OF ARMY ELECTRONICS MATERIEL

Destruction of Army electronics materiel to prevent enemy use shall be

0-1

TM 11-6625-2749-14&P

SECTION

SPECIFICATION

Introduction

h Type 7A22 Vertical Plug-in is

enticd

amplifier with excellent common-mode reiection char-

acteristics and high gain for low level applications.

The DC Offset capability of the Type 7A22 allows the

display of the very small low-frequency signals containing

large DC component, at deflection factors not possible with AC coupling. The vertical deflection factor range of the Type 7A22 is from 10 pV to 10 V. The high and low frequency —3 dB points to set the bandwidth of the instrument. Thus, for low fre-

quency applications the signal-to-noise ratio can be improved

by restricting the bandwidth of the Type 7A22. The bandwidths selection and excellent drift-with-time provide measurement capabilities in the biomedical, trans-

ducer, and other areas which require stable, low deflection

factor, low noise measurements.

The Type 7A22 is designed for use in Tektronix 7000 Series

oscilloscopes.

The electrical characteristics described in this section are

volid over the stated environmental range for instruments ccdibrated at an ambient temperature of +20”C to +30” and after

a 5

can be

minute warmup unless otherwise noted.

ELECTRICAL CHARACTERISTICS

Characteristic

Deflection Factor ~VOLTS/DIV]

Gain Ratio Accuracy

VAR (CAL IN) Range

GAIN

Differential Signal Range [DC OFFSET not used)

10 pV/Div to

mV/Div

20 mV/Div to

0.1 V/Div

0.2 V/Div to 1 V/Div

2 V/Div to

10 V/Div

Performance

Within 2% with GAIN ad@sted at 1 mV/div

Continuously variable; extends deflection factor to at least 25 V/div

Permits ad@stment of deflection

factor at 1 mV/DIV for all mainframes

At least AI V

At least *1O V

At least A1OO V

At least A1OOO V

a DC

selected at the front panel,

coupled differ-

characteristics

Requirements

DC OFFSET

COARSE Range from Electrical Zero

10 pV/Div to 10mV/Div

20 mV to 0.1 V/Div

0.2 V to 1 V/Div 2V to 10 V/Div

Frequency Response (8

div Reference)

Overall Frequency Response DC (Direct) Coupled Input

AC (Capacitive) Cou pled Input Lower Bandwidth Frequencj

Bandwidth Limit

Accuracy

HF –3dB POINT

100Hz to 1 MHz

Accuracy

LF –3 dB POINT

0.1 Hz to 10 kHz Accuracy

Recovery Time

Common Mode Signal

10 pV/Div to

10 mV/Div

20 mV/Div to

0.1 V/Div

0.2 V/Div to 10 V/Div

Common-Mode Reiection Ratio

DC (Direct) Coupled

AC (Capacitive)

Coupled

At least +1 V to –1 V

At least +1OV to –1OV

At least +100 V to –1OOV At least +1000 V to –1OOOV

DC to within 10~o of 1 MHz at –3 dB

2 Hz or less

9 steps in

Within 10~o of selected frequency 6 steps in

Within 12% of selected frecluency 10 ps or less to recover to within

0.5% of zero level after the removal of

plied for 1 s. Test signal not to exceed Specified aberration (0.5%) based on test signal amplitude

At least +1OV and –1OV

At least +1OOV and –1OOV

At least +500 V and –500 V

See Verification Points on graph, Fig. 1-2.

1-3 sequence

1-10 sequence

a + or —

Differential Signal Range.

test input ap-

1-1

1-2

Fig. 1-2. CMRR vs. Frequency for signals not exceeding Common Mode Signal Range.

TM 11-6625-2749-14&P

ELECTRICAL CHARACTERISTICS (cont)

Characteristic

Maximum Input Voltage krch insxst}

Input R and C

Maximum Input Gate

Current

Varicrkde Balance

Displayed Noise (Tangentially Measured)

,-.

DC (Direct) Coupled, EK + Peak AC, AC Component 1 Mt-lz or less

10pV/Div

mV/Div

20 mV/Div to 0.1 V/Div

.2 V/Div to 10 V/ Div

AC (Capcrcitive) Coupled Input DC Voltage

AC (Capacitive] Coupled

Input DC Reiection

Resistcmce Capacitance F! & C Product

10 ~V/Div to 10 mV/ Div

20 mV/Div to IOV Div

Display Shift at 10 pV jDiv (AC Coupled]

Performance

M least 4 X

lMa & l~o Approximate

Within 3=1 Y. between all deflection factors

+25°

+-20 pA *1OO pA each input +40 pA *200 pA Differentially

&lOpA

&20pA

A4 div &20 div

).2 div or less shift with VARIABLE :ontrol turned from fully cw to UIIY ccw position

6 pV or 0.1 Div (whichever is

~reater), 1 MHz HF –3 dB POINT,

ource resistance

Requirements

05:1

47.0 pF

25 Q or

-4-50°c

less

TM 11-6625-2749-14&P

DC Drift

Drift with Time (Ambient Temperature and Line Voltage Constant)

Short Term

Long Term

Drift with Ambient

Temperature (Line

Voltage Constant)

Isolation between + and

– Inputs (+ INPUT to an Open — INPUT, — INPUT to on Open INPUT)

5 pV (P-P) or 0.1 div (whichever is greater) in any minute after 1 hour warmup

10 pV (P-P) or 0.1 div (whichever is greater) in any hour after 1 hour warmup

50 pV/ “C or less

-f-

At least 200:1, DC to 1 MHz

ENVIRONMENTAL

PLUG-IN TESTED OUT OF INDICATOR

ITEM

Altitude

Non-operating

Transportation

CHARACTERISTIC

To 50,000 feet and —55° C Qualified under National Safe

Tronsit Committee test procedure

1A, Category

PHYSICAL

ITEM CHARACTERISTIC

Finish Dimensions

Weight

Front panel is anodized aluminum s

145/8

478 inch H

25/8

Ibs

inch L X

OSCILLOSCOPE

2S/8

inch W X

1-3

TM 11-6625-2749-14&P

SECTION 2

OPERATING INSTRUCTIONS

Introduction

This section opens with a brief functional description of

the front-panel controls, input overdrive lamp, and input

connectors. Following the front-panel description is a familiarization procedure and finally a general discussion of the operation of the Type 7A22.

CONTROLS AND CONNECTORS

INPUT Input overdrive indicator lamp turns on OVERDRIVE

VOLTS/DIV Volts per displayed division. Nineteen

VARIABLE (CAL IN]

GAIN

POSITION IDENTIFY

HIGH

FREQUENCY

-3 dB POINT

to indicate excessive differential drive to the input amplifier stage. Lights when the differential dynamic range between input connectors is exceeded.

position switch used to select the calibrated deflection factors.

Two-position switch activated by the VARIABLE knob to select calibrated or uncalibrated deflection factors. At the IN position, the VARIABLE control is inoperative and the deflection factor is calibrated. When pressed and released, the knob moves outward to activate the VARIABLE control for uncalibrated de-

flection factors. The uncalibrated posi-

tion provides continuously variable uncalibrated attenuation between the calibrated deflection factors and extends the deflection factor to at Ieost 25 VOLTS/DIV.

Screwdriver adjust control to set the CRT

display scale factor to agree with the

VOLTS/DIV switch indication. Adjusted

for proper deflection with the VOLTS/

DIV switch set to the 1 mV position. The control that vertically positions the

trace or display. Momentary contact, push-button switch,

concentric with POSITION. Will cause the trace, representing the output of the Type 7A22, to move a small amount when pressed. Aids in identifying the Type 7A22 trace when multiple traces are displayed.

Nine position switch to select the approximate high frequency -3 dB point. The switch positions are: 100 Hz, 300 Hz,

1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz,

300 kHz, and 1 MHz.

LOW

FREQUENCY

-3 dB POINT

+INPUT

Fig. 2-1. Signals applied to the + INPUT connector produces an upright display, while signals applied to the — INPUT are inverted.

+ AC-GND-DC

Eight position switch to select DC coupling or the approximate low frequency

-3 dB points. The switch positions are: DC OFFSET, DC, .1 Hz, 1 Hz, 10 Hz, 100 Hz, 1 kHz, and 10 kHz.

Signal input connector. Positive input produces deflection upward (see Fig. 2-l).

Signal input connector. Positive input produces deflection downward (see Fig.

Fig. 2-1

A miniature illuminated push-button type switch. The buttons are interlocked so that only one button may be depressed at one time. When the ‘AC’ button is depressed the signal is coupled through

0.1 µF to the Input Amplifier and only the varying component of the input sig-

nal is amplified.

When the ‘DC’ button is depressed the signal is coupled directly to the Input

Amplifier and the entire input signal, both AC and DC, is amplified. When the ‘GND’ button (or none of the buttons) is depressed, the signal is coupled

Mfl

through 0.1 µF and through 1

ground. The Amplifier Input is grounded

in this condition.

2-1

TM 11-6625-2749-14&P

aEoch push-button is illuminated from behind when the button is depressed.

– AC-GND-DC

The following when the LOW is set to DC

STEP ATTEN

DC BAL (DC MODE the amplifier input stage. With

ONLY)

DC OFFSET

(DC OFFSET

mode only)

RELEASE LATCH Gray rectangular knob near the bottom

Same function as the + AC-GND-DC switch but applied to the — INPUT.

IMPORTANT

two controls ore operative only

FREQUENCY

DC OFFSET.

Front panel cantrol for DC balancing

nals applied ta the input connectors, the control is adlusted for shift as the VOLTS/DIV switch is moved from the 10 mV pasition to the 10 position.

Coarse and fine controls to provide internal offset bias while maintaining

the differential

range of the offset bias depends upon the settings of the VOLTS/DIV and is indicated by shaded gray bands (OFFSET RANGE) around the VOLTS/ DIV switch.

left of the front panel. Pull out to remove Plug-In fram Plug-In compartment.

—3 dB

POINT switch

capability. Available

switch,

sig-

trace

~LV

OPERATING INSTRUCTIONS

First-Time Operation

Steps

to help place the trace the unit for immediate use. Steps 6 through 8 are used to check remaining are intended to demonstrate some of the basic functions of the Type 7A22.

ment.

clockwise and turn the oscilloscope Power ON. Preset the

time-base and triggering controls and automatic triggering.

oscilloscope to warm up.

1 through 5 in the following procedure are intended

the GAIN adjustment. These steps slang with those

Insert the unit inta the ascilloscape plug-in compart-

2. Set the Type 7A22 front-panel controls as follaws:

VOLTS/DIV VARIABLE POSITION

HIGH FREQUENCY

–3dB POINT

LOW FREQ –3 dB AC-GND-DC AC-GND-DC STEP ATTEN DC BAL

3. Turn the oscilloscope Intensity control fully counter-

4. Wait about five minutes for the Type 7A22 and the

(–

INPUT)

the screen quickly and prepare

1 mV IN (CAL)

Midrange

1 MHz

POINT

DC GND GND Midrange

for a .5

ms sweep rate

NOTE

About five minutes is sufficient time for warmup when using the Type 7A22 for short-term DC measurements. For long-term DC measurements the lower deflection factors, allow at least one hour.

5, Adlust the Intensity control for normal viewing of

the trace. The trace shauld appear near the graticule center.

6. Using the POSITION control, position the trace 2 divi-

sions below graticule center.

CAUTION

If the maximum input voltage rating in the 10 /IV

to 10 mV range of the VOLTS/DIV ceeded, the inputs are diode-clamped voltages of approximately

—16.5 volts and damage to the signal source is

possible. If the signal source can supply more than

1/1 6 A of current, the input protective fuse (s)

will open. An apen input fuse is indicated by the

lighting of the INPUT OVERDRIVE indicator with the

input coupling switches set to GND.

7. Apply

coaxial cable to the + INPUT connector

7A22.

8. For DC coupled, single-ended operation, set the +

INPUT AC-GND-DC

should

bottom of the disploy at the reference established in step 6.

9. For AC coupled, single-ended operation, reposition the

display with the Type 7A22 POSITION control to place the

bottom of the display at the graticule center line.

10. Set the + INPUT AC-GND-DC coupling switch to AC

and note that the display shifts downward about 2 divisions

to its average Ieve!,

11. Disconnect the coaxial cable from nector. Connect and — INPUT connectors. Connect the coaxial cable from

the Calibrator

12. For AC coupled differential —INPUT AC-GND-DC brator signal is now coupled to both inputs as

mode signal. A straight line display should

since the common-mode is being relected.

Operational Adjustments

Most of the following checks and adjustments may be made after to the DC drift of the amplifier during

warmup,

adjusted for each check or adjustment, warmup of at least one hour should be allowed before

in conjunction with the Type 7A22 is correctly cali-

brated (refer to the oscilloscope manual) and that

the calibrated output voltage is correct.

a 4 mV

square waves 4 divisions in amplitude with the

the

BAL is attempted. Insure that the oscilloscope used

peak-to-peak calibrator signal through

coupling switch to DC. The display

dual input connector

the dual input connector.

a 5

STEP ATTEN DC

final adjustment of the STEP ATTEN DC

coupling switch

NOTE

minute warmup; however due

16.5 volts and/or

the +

operation, set the

BAL shauld be re-

using

switch is ex-

fixed

the Type

INPUT con-

the + INPUT

AC. The cali-

common-

observed,

subsequent

and

2-2

TM 11-6625-2749-14&P

1. AC ATTEN BAL

LOW FREQ —3 dB POINT switch is used to limit the low frequency response of the Type 7A22, the unit employs AC stabilization. This means that when the switch is set to

crny

position except DC or DC OFFSET, the STEP ATTEN DC BAL and DC OFFSET controls become inoperative. VOLTS/DIV

BALI ;; inkm-ml cdiushent

Fig.

When trcsnsferring the Type 7A22 from ane oscilloscope to another, it may ad~ustment of this control, due to normal power supply varicstions between oscilloscopes.

Ixslance is then controlled with the AC ATTEN

2-2. location

of AC ATTEN BAL

(internal adiustmerst) . When the

(see

Fig. 2-2].

control.

necessary to perform

minor re-

NOTE

An unbalance of up to 30 pV is normal and cannot be reduced by adiusting the AC ATTEN BAL control.

With the Type 7A22 inserted into the oscilloscope, re-

move the left side panel of the oscilloscope and set the

Type 7A22 controls as follows:

VOLTS/DIV AC-GND-DC (+ INPUT) AC-GND-DC (–INPUT) LOW FREQ —3 dB POINT 10 Hz HIGH FREQ –3 dB POINT 100 Hz

Using the POSITION

graticule center.

c. Set the VOLTS/D[V

Adiust the AC ATTEN BAL control, R505, to position the trace to within 1.5 divisions of graicu[e center. (See note in step

INTERACTION:

1).

quence, steps 2 and 3 must also

this adjustment is made out of se-

1 mV

GND

control, position the trace to

switch to 20 pV.

performed.

VAR BAL R425.

Set the Type 7A22 controls as in step 1 -a.

Position the trace to graticule center with the POSl-

TION control.

With the VAR (CAL IN) in the out position, rotate the

VARIABLE control from stop to stop. Check for no move-

ment of trace.

Adiust R425 for no movement of trace as the VARlABLE control is rotated from stop to stop. (See Fig. 2-2 for location of adjustment.)

3. STEP ATTEN DC BAL. With zero input voltage and the LF –3 dB POINT selector at DC, if the STEP ATTEN DC BAL is not properly adiusted the CRT trace will shift vertically as the VOLTS/DIV its range.

tive positions.

VOLTS/DIV

VARIABLE [CAL IN)

POSITION HIGH FREQ –3 dB POIN’ LOW FREQ –3 dB POINT AC-GND-DC (+ INPUT) AC-GND-DC (–INPUT) STEP ATTEN DC BAL

CRT trace to the center of the graticule.

STEP

The shift is more noticeable at the most sensi-

Set the Type 7A22 front-panel centrals as follows:

Using the Type 7A22 POSITION control, position the

Set the VOLTS/DIV

Return the trace to graticule

ATTEN DC BAL cantrol.

(Internal adjustment].

switch is rotated throughout

10mV CAL Midrange

1 MHz DC GND GND Midrange

switch to

I o pv.

center by adiusting the

NOTE

The adjustment of the STEP ATTEN DC BAL con-

trol should be checked periodically

of the instrument. If the Type 7A22 is used DC

coupled or in significantly

peratures in the 10 KV/DIV to

the STEP ATTEN DC BAL should be checked quite frequently.

trol and readiust, if necessary, before any critical measurement is made under the above conditions.

It is

good practice to check this con-

during the use

varying ambient tem-

mV/DIV ranges,

4. GAIN

Perform steps 1 through 8 in the First-Time Operation

Procedure.

Adiust the GAIN control for exactly 4 divisions of

display.

NOTE

Accuracy of this adjustment is dependent upon the voltage accuracy of the calibration source.

2-3

TM 11-6625-2749-14&P

GENERAL OPERATING INFORMATION

Trace Drift

The environment in which the Type 7A22 is operated and the inherent characteristics of the Type 7A22 influence trace drift. Therefore, to determine trace drift for vironment refer to the Specification Section. In environment in which the ambient temperature does not vary as an air-conditioned building) the trace drift generally will not exceed 10 ~LV in one hour.

Input Gate Current

When using the .1 mV/DIV to 10 ILV/DIV ranges for measurement with where the source impedance is high input gate current should

adlusted to zero. This is particularly desired at high temperatures (abave 40” Check/Calibration procedures for setting the gate current to zero.

Voltage Measurement

To obtain accurate DC measurements at maximum sensitivity, it is necessary the amplifier lust before making the measurement. This is accomplished by adiusting the STEP ATTEN DC BAL as

described under operational adjustment number 3.

When measuring DC voltages, use the largest deflection

factor (10 V/DIV) when first connecting the Type 7A22 to an unknown voltage source. small to make the measurement, switch to tion factor. If the input stage is overdriven, of current might flow into the input. See CAUTION after item 6 of First Time Operation.

Where only the AC component of

AC and DC components is to GND-DC switches to take advantage of the pre-charging circuit incorporated in the unit. The pre-charging circuit

permits the coupling capacitor to charge to the DC source

voltage when the AC-GND-DC switch is set to GND. Procedure for using this circuit is as follows:

Before connecting the Type 7A22 to

ing

a DC

switch to GND. Then connect the input to the circuit under test.

Allow about one second for the coupling capacitor to

charge.

Set the input coupling switch to AC. The display will remain ured in the usual manner.

d. On

DC switch to GND and short the input connector to ground.

The above procedure should

other signal with

If the Type 7A22 is connected to

age source sion,

an AC

companent, set the AC-GND-DC

the screen and

completion of the measurement, set the AC-GND-

the peak charging current (into 0.1 ILF

coupled input, for DC measurements

C).

Steps 7 and 8 in the Performance

Procedure describe the

ground the input and DC balance

the AC

different DC level is connected.

CAUTION

without using the pre-charge provi-

(in

checked and allowed for, or

Then, if the deflection is too

measured, use the AC-

component

followed whenever an-

specific

much (such

excess of 1 Mo) the

check

signal having both

large DC volt-

and adiust

lower deflec-

large amount

signal containinput coupling

can be

en-

meas-

capacitor) source, and this source may be damaged or de-

stroyed.

When 7A22 with the input AC coupled, the input coupling capacitor acquires as

very slowly decaying output voltage. This sequent AC coupled measurements at other DC voltages

and drive the trace off-screen. A period of at least 10 min-

utes, with input set to GND, should

reasonable recovery from polarization, and a longer period

may

connectors are shorted to ground the depolarization process will require less time.

Signal Input Connectors

When connecting signals to the +INPUT and –INPUT connectors pling that will sometimes source, particularly when is monitored at of these factors are missing, it becomes increasingly important to use shielded signal cables. In all cases, the signaltransparting leads should

When making single-ended input measurements, to establish test and the Type 7A22. The shield of normally used for this purpose.

In some cases differential measurements require mon ground’, ference by ground loop currents. Some problems with stray magnetic coupling into the signal transporting leads can

also single-ended measurement. cussed later in this section under Differential Operation.

It is always important to consider the signal-source loading and resulting change in the source operating characteristics due to the signal-transporting circuit of the Type 7A22. The circuit at the input connectors can

normally ground paralled by 47 pF. A few feet of shielded cable may increase the parallel capacitance In many cases, the effects of these resistive and capacitive loads may them through the use of

Attenuator probes not only decrease the resistive and capacitive loading of measurement range of the Type 7A22 to include substantially higher voltages. Passive attenuator probes having attenuation factors of 10X, 100X, and lOOOX, as well as other special-purpose types are available through your Tektronix Field Engineer or Field Office.

Some measurement situations require put to the Type 7A22 with very littIe source loading or sig-

‘The DC plus to the chassis the levels listed in Section 1 under Voltage reiection ratio

will be limited only by the signal

large DC voltage has been applied

low voltage, high impedance voltage source with

characteristics.

charge due

necessary for critical measurements. If the input

the Type 7A22, consider the method of

used to connect the Type 7A22 to

common ground between the device under

and therefore are less susceptible to inter-

minimized by using

represented by

too great and it may

peak

potential

and

exceed the input

dielectric polarization and acts

used. Ordinary unshielded test leads

high level, low-frequency signal

low impedance point, However when any

kept as short as practical.

These considerations

attenuator probe.

signal source, but also extend the

voltages

of the Type

Higher

on the test points with respect

levels will

differential rather than

leads and

a 1

megohm resistance ta

desirable to minimize

7A22

Maximum

degrade

voltage rating

the Type

can

offset sub-

allowed to assure

cau

coaxial cable is

are dis-

the

100 pF or more.

high-resistance in-

should be limited to

Common-mode Input

the common-mode

of the unit.

can

signal

sure

com-

input

2-4

TM 11-6625-2749-14&P

not attenuation. In such

probe cannot by using an vision of the Type 7A22.

High Input Impedance

TIM

coupled signals which permit the use of 10mV through 10 pV”psitions no input attenuator is used at these switch positions, the

internal gate return resistor olone establishes the 1 megohm input resistance.

The high input impedance is obtained by unsoldering the wire strap nal gate return resistance. The signal source must then provide

a DC

csetive

high input impedance provision applies only to DC

the VO”LTS/DIV switch, (DC coupled). ‘Since

(see

Fig. 2-3] between the input line and the inter-

path for the FET gate current.

situcstion

used. However, this problem may

probe or the high input impedance pro-

passive attenuator

solved

Display Polarity

Single-ended signals or —INPUT connector. If the + INPUT is chosen, positivegoing changes in the input signal will cause the trace to be deflected upward, and negative-going changes will cause the trace to

chosen, input-to-display polarity relationship will as shown previously in Fig. 2-1.

Deflection

The amount of trace deflection produced by determined by the signal amplitude, the attenuation factor of the probe, the setting of the VOLTS/DIV switch and the

setting of the VARIABLE control. The calibrated deflection factors indicated by the VOLTS/DIV switch apply only when the VARIABLE control is pushed “in” to the CAL IN position.

The range of the VARIABLE control is at least 2.5:1. It provides uncalibrated deflection factors covering the full range between the fixed settings of the VOLTS/DIV switch. The control can be set to extend the deflection factor to at least 25 volts/div.

Noise

Factor

Can be

deflected downward. If the —INPUT is

applied to either the +INPUT

reversed

signal is

Fig.

2-3. location of wire

return resistor.

The uncompensated gate current is typically less than 100 picoamperes, upon the operating temperature. The signal-source imped-

ance is therefore can important factor since gate current will produce

current through 10 megohms produces

may resu[t in

concern.

Men the wire straps are removed, R111 and R211

are disconnected. The deflection factor in the 20 m V/

DI V to 10 V/Dl V range will be incorrect.

The high-frequency response will

but may

a DC

signcsl-source impedance,

between the source input capacitance, must charge and discharge through that impedance [see Fig. 2-4).

strap between input

several times higher depending

offset. For example,

significant error where small voltages are of

NOTE

since various shunt capacitances

cmd

the 7A22 input as well as the 47 pF

line and internal gate

100 picoampere gate

a 1 mV

also depend upon the

offset; this

To reduce noise and obtain the VOLTS/DIV switch is operated in the 10 wV, 20 wV, and 50 pV positions or when the signal source is “noisy, it is suggested that the HIGH FREQ —3 dB POINT selector to use the lowest bandwidth setting which does not appreciably distort the desired features of the signal under observation. Refer to Fig. 2-6 for the high frequency rolloff for each setting of the HIGH FREQ —3 dB POINT selector.

Bandwidth

In addition to the differential reiection of unwanted signals, many times an undesired signal the bandwidth of the unit. The LOW FREQ –3 dB POINT and HIGH FREQ —3 dB POINT selectors on the front panel of the 7A22 control the low-frequency and high-frequency

–3 dB points of the amplifier. The LOW FREQ –3 dB POINT

selector provides low-frequency response to DC or to ap-

proximate —3 dB points at .1 Hz, 1 Hz, 10 Hz, 100 Hz, 1 kHz,

and 10 kHz. Refer to Fig. 2-5. The HIGH FREQ —3 dB POINT

selector controls the high-frequency rolloff from 1 MHz to

100 Hz in frequency response falls off at to Fig. 2-6.

Varying the bandwidth of the Type 7A22 is useful, for example, when displaying the high-frequency response the noise can, in many cases, be considerably reduced without distorting the desired signal

(see Fig. 2-7). Likewise, undesired line-frequency signals can

filtered out by restricting the low-frequency response of

the unit. When using the LOW FREQ —3 dB POINT and

HIGH FREQ —3 dB POINT selectors, care must be taken not to distort non-sinusoidal waveforms by overly restricting the amplifier bandwidth.

Selection

1-3-10 sequence. Beyond the –3 dB points the

more usable display when

can be

a 6 dB

low-frequency signal. By reducing

attenuated by varying

per octave rate. Refer

set

REV. B, FEB. 1975

2-5

2-6

Fig. 2-4A. 7A22 CMRR at 10 µV/Div to 10 mV/Div. Inputs DC Coupled. Worst-case degradation due to source resistance.

TM 11-6625-2749-14&P

Fig. 2-4B. 7A22 Bandwidth and VOLTS/DIV Error as functions of Source Resistance.

TM 11-6625-2749-14&P

2-7

2-8

Fig. 2-5. 7A22 FREQUENCY RESPONSE as a function of LF -3 dB POINT SETTING (HF -3 dB POINT at 1 MHz)

TM 11-6625-2749-14&P

Fig. 2-6. 7A22 FREQUENCY RESPONSE as a function of HF - 3 dB POINT settings ( LF —3 dB POINT of DC).

2-9

TM 11-6625-2749-14&P

2-7.

Fig.

QUENCY 1 MHz. UPPER —3 dB FREQUENCY, 10 kHz.

Improving

(Al

Lower —3 dB FREQUENCY selector to DC, UPPER — 3 dB FRE-

signal-to-noise

[B) Lower —3 dB FREQUENCY selector to DC,

ratio by setfing

bandwidth.

Voltage Comparison Measurements

Some applications require than the fixed values provided by the VOLTS/DIV One such application is comparison of signal amplitudes by

ratio rather than by absolute voltage.

To accomplish this, apply

put of

the

ABLE control throughout the subsequent comparisons. The settings of the VOLTS/DIV switch to accommodate large ratios. In doing so, regard the num-

bers which designate the switch position as ratio factors rather than voltages.

Type 7A22. Set the VOLTS/DIV switch and VARl-

set of deflection factors other

reference signal to either in-

can be

changed, however,

switch.

Differential Operation

Differential voltage measurements are made by applying the signals to the +INPUT Then, both AC-GND-DC switches should positions: AC or DC, depending

and —INPUT connectors.

set to the same

the method of signal

The Type 7A22 differential input provision may to eliminate interfering signals such as AC line-frequency hum. Single-ended measurements often yield unsatisfactory information because of interference resulting from groundIoop currents between the oscilloscope and the device under test. In other cases, it may voltage by means other than the use of itor which would limit low-frequency response. These limitations af single-ended measurements are virtually eliminated in differential measurements.

A differential measurement is made by connecting of the two inputs to selected points in the test circuit. The input to the amplifier will then of the two selected points

The ability of the Type 7A22 to relect common-mode sig-

nals is indicafed by the common-mode relection ratio (CMRR).

This ratio is at least 100,000:1 at the input connectors for the

lower deflection factors (10

signals between DC and 100 kHz are DC-coupled to the in-

puts. To show the significance of this characteristic, assume

that

single-ended input signal consists of

Hz signal at 1 volt P-P plus

an attempt is made to display the desired signal with the

VOLTS/DIV produce

useful information about the 1 mV signal could

If, however, the same 1 mV signol is monitored differentially so that the 60 Hz signal is ;ommon-mode at the inputs, no common-mode signal will appear in the display. Thus, the desired signal produces only .05 div of interference due to the common-mode signal.

There are

mode rejection. The principal requirement for maximum reiection is for the common-mode signal to arrive at the input FET gotes in presicely the same form. A difference of only

0.01 ~o in the attenuation factors of the input attenuators may reduce the rejection ratio to 10,000:1. Likewise, any difference in source impedance at the two points in the source under test

will degrade the relecfion ratio. Attenuator probes which do

not have an adjustable resistance may reduce the rejection ratio to 100:1 or less.

Outside influences such as electrostatic and Imagnefic fields

can level signals are involved. Electrostatic interference minimized by using shielded signal transporting leads of the

same ty~e to the two inputs, and by twisting the leads to-

gether ‘throughout most of their length. -

Care should signal transporting leads, as any movement of txesence of that lead. Where

avoided, the pickup loop formed by

minir’nized by taping or twisting them together throughout

most of their length. Low-frequency measurements similarly protected by using a

twisted pair of conductors.

switch set to .2 mV, the 60 Hz signal would

deflection equivalent to 5000 div, and thus little

greater than one part

number of factors which

also degrade

the

taken to minimize the movement of

maanetic field, will tend to induce

desirable to eliminate

DC-blocking copac-

the difference in voltage

(see

Fig. 2-9).

/LV to 10 mV

desired signal at 1 mV P-P. If

one hundred thousand of

disploy amplitude af 5 div with

performance, particularly when low

interfering magnetic field cannot

shielded cable which contains

per division) when

can

degrade common-

the

two leads should

each

unwanted 60

obtained.

can be

lead, in the

sianal into

can be

used

the

2-10

Fig. 2-8

TM 11-6625-2749-14&P

DC Offset Operation

By using the DC OFFSET controls, it is possible to use the Type 7A22 differentially in a slide-back mode, to observe small signal whose DC potential difference may be considerable. The offset is continuously adjustable from +1 V to –1 V when the VOLTS/DIV switch is in the 10µV to 10mV positions. In the 20mV, 50mV and .1 V positions of the VOLTS/DIV switch, the 1 V offset is effectively multiplied by

the input attenuator to a range of ±10 V. Table 2-1 sum-

marizes the effective DC offset voltages internally available

for all the VOLTS/DIV switch positions. The table also lists

the input attenuator that is switched into the amplifier circuit for the various VOLTS/DIV switch positions.

TABLE 2-1

Using the DC OFFSET functions:

Set the Type 7A22 controls as follows:

VOLTS/DIV VARIABLE (CAL IN) CAL POSITION Midrange AC-GND-DC GND

(+ and – INPUT) HF -3 dB POINT 1 MHz LF -3 dB POINT DC

STEP ATTEN DC BAL Adjusted for DC balance

1. Position the trace to graticule center (or some other

convenient reference line) using the POSITION control.

2. Connect a coaxial cable from the signal source to the

+INPUT.

3. Set the + INPUT AC-G ND-DC switch to DC and meas-

ure the DC level to be offset.

4. Set the VOLTS/DIV to the largest deflection factor in an

offset range which will encompass the DC level measured in

step 3. See Table 2-1 and front panel color bands.

5. Set the LF -3 dB POINT selector to DC OFFSET,

10V

2-11

TM 11-6625-2749-14&P

NOTE

If switching into another offset range, the OFFSET controls will need to be readjusted. If switching into

smaller offset range, check that the avail-

able range present (see steps 3 and 4 above) .

sufficient to encompass the DC level

Input Overdrive

The INPUT OVERDRIVE indicator turns

the input FETs approaches the differential dynamic range

of the amplifier. The 7A22 should not a

circuit if this light is on, as this may mean that

voltage is present.

The INPUT OVERDRIVE indicator serves another important function. If the amplifier is direct-coupled at the input, a DC differential signal could overdrive the input stage ond cause a

reduction in gain, The small voltages to

not

distorted, but will sult, amplitude measurements made under such conditions will not

accurate. The Type 7A22 INPUT OVERDRIVE indicator provides lighting before the gain calibration changes by 1

the

sible ways to continue:

DC differential sicinals may then indicated in Table-2-l.

signals up to 1000 V (either input not to exceed 500 be sarily limits the low frequency response to 1,6 Hz (or

0.16 Hz with

The INPUT OVERDRIVE lamp is insensitive mode overdrives, and it is possible to overload the Type 7A22 without lighting the input overdrive light.

In summary following conditions:

of the amplifier

b. An light will remain on even if to

GND.

c. There is

INPUT OVERDRIVE lamp turns on, there are two pos

Switch the LF —3 dB POINT selector

2. Switch the AC-GND-DC switch to AC. DC differential

removed by using AC coupling at the input. This

The input signal exceeds the differential dynamic range

input protective fuse is blown. In this case,

Indicator

reduced in amplitude. As

indication that such

10X probe).

the

overdrive indicator will turn

(see

Section 1 for table of dynamic ranges).

the

circuit malfunction.

‘

AC-G ND-DC switches are set

when the signol

left connected

measured will

signal is present by

~o.

to DC

balanced out as

damaging

OFFSET.

may

neces-

common-

under the

the

re-

Fig,

2-9. Connecting

6. Use the COARSE and FINE controls to move tion of the signal to lished instep

7. If

may

2-12

different size display isneeded, the deflection factor

changed in the same offset range.

differential amplifier

observed to the reference line estab-

across a

circuit.

the

por-

Readout

the

Type 7A22 is

readout capabilities, special probes which correct

out deflection factor for probe attenuation may

Divider probes not having with the instrument, but they will not operate the sensing system, and the deflection factor of on the VOLTS/DIV knob) will

The +INPUT and —INPUT connectors have which is connected allows

the

tion factor from the probe tip for any probe attenuation, For

main-frame readout

to be

used

in an

the

sensing capability may

the readout probe sensing device. This

oscilloscope having

the

plug-in only (as reed

displayed.

display

the

REV.

correct deflec-

B, FE B.

the

read-

used.

outer ring

1975

used

TM 11-6625-2749-14&P

example: if a 10X probe is used it will increase the deflec-

tion factor, in the readout display, by a factor of 10. Then the

actual deflection factor at the probe tip is displayed (see

Table 2-2).

NOTE

If only one divider probe (or two probes with equal divider ratios) is connected, the deflection factor at the probe tip will displayed; if probes with different divider ratios are connected (e.g.,

IOX and 100X), the readout will display the de-

flection factor at the tip of the probe with the

larger division ratio (100X).

TABLE 2-2

TYPE 7A22

Plug In

VOITS/DIV Probe Atten Probe Atten Probe Atten

Setting

.5 mV

50 mV

Trace Identify. With the oscilloscope turned on and a sweep displayed on the CRT, check for approximately 0.2 div of vertical movement of the trace when the IDENTIFY

pushbutton is depressed. The vertical scale factor readout

associated with the 7A22 will change to the ward IDENTIFY.

An incorrect CRT readout will occur in the 10V/div position when using the 100X Readout coded probe (P6009, Tektronix Part No. 010-0264-01). When used in

10 V/div setting, reading will show IV instead of 1KV.

Main-Frame Displayed Readout

used 1 X used 10X

500

µV

50 mV

NOTE

5 mV

500 mV

used 100X

50 mV

REV. B, AUG. 1974

2-13

TM 11-6625-2749-14&P

SECTION 3

CIRCUIT DESCRIPTION

introduction

Mock diagram description covering the general con-

figuration of this section. Following the block diagram description is detailed description of each circuit and the functions of spe-

cific components.

Simplified drawings ore provided where necessary for easier circuit understcsnding. Complete schematic diagrams are included in the Diagrams section. These should be referred to throughout the detailed circuit description.

The values of resistors on the schematics are in ohms unless otherwise specified. Capacitor values are indicated in the following manner unless otherwise specified: whole numbers indicate that the value is. in pF, decimal numbers indiccste that the

pF.

each

circuit in the Type 7A22 is included in

vcdue is in

pF. For example, 33 pF and 0.1

BLOCK DIAGRAM DESCRIPTION

(see Block Diagram Pullout

preceding schematics)

Input coupling

A signal applied to the + or —Input connector passes

through the input coupling selector switch to the input attenuator circuit. The signals pled or disconnected internally. (See Schematic Diagram

Number

1].

can be AC

coupled, DC cou-

Preamp

From the input attenuators, the signal is coupled to the preamp. The preamp consists of two identical feedback amplifiers connected in

all differential gain is approximately 15.

The supply voltages for the two amplifiers are obtained from

input to improve the common-mode reiection ratio of the preamp.

cuit consiting of fuses and clamping diades. For deflection

factors from 10 pV/DIV through 10 mV/DIV the fuse will

open if the current exceeds at the input), preventing damage to the input circuitry.

common power supply which is bootstrapped to the

Each input is equipped with an overdrive protection cir-

differential configuration. The over-

‘/IA A

(approximately

CAUTION

16.5 volts

Input Attenuators

The input attenuators for the -f- and —inputs are iden-

ticcsl

and are conventional RC type attenuators. Common

resistive elements are adjustable to facilitate matching the —

and +- attenuators to obtain optimum DC common-mode

signcrl re~ection.

The attenuators (Schematic Diagram number quency-compensated stant attenuation at all frequencies within the passband of the instrument, while maintaining

voltage dividers which pravide con-

constant input time con-

are fre-

Low Frequency

The push-pull output of the preamp is coupled through LOW FREQ —3 dB POINT selector. The selector switches the components of the coupling network in each half of the pre-

amp to select the low frequency —3 dB points (.1 Hz, 1 Hz,

10 Hz, 100 Hz, 1 kHz and 10 kHz). The DC position of the

selector bypasses the low frequency selection circuitry and direct-couples the preamp to the Output Amplifier.

— 3 dB

Point

3-1

TM 11-6625-2749-14&P

Output Amplifier

The signal from the LF -3dB POINT selector is coupled

to the gain-switching section of the Output Amplifier. This

section of the Output Amplifier is a pair of feedback am-

plifiers similar to ‘that of the prearnp. The VOLTS/DIV

switch changes the amplifier gain.

Fig, 3-1. Generalized feedback system showing the relation between input and output.

High Frequency -3 dB Point

The HF -3dB POINT selector switches capacitance across the output of the Gain Switching Amplifier to set the high frequency -3 dB point at any of 9 frequencies; 100 Hz, 300

Hz,’ 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, 300 kHz, and 1 MHz. The capacitance used in the 1 MHz position is adjustable to set the bandwidth to normal value.

Positioning of the trace, and VARIABLE VOLTS/DIV, are

provided in the stage following the HF -3 dB POINT se-

lector.

Overall amplifier gain is adjusted in the signal output stage of the Output Amplifier by adjusting the common emitter resistance.

GENERAL INFORMATION

Feedback Amplifiers

Since the Type 7A22 utilizes several multi-stage feedback amplifiers, a brief review of feedback systems in general

is given.

Fig. 3-1 represents a generalized feedback system in which it is desired to produce an output signal accurately and stably related to the input. The arrangement of Fig. 3-1 causes the modified output to be nearly equal to the input. Any difference between these is detected by the comparator, which produces an error signal equal to the difference, and applies this error to the amplifier, which amplifies the error and feeds back a correction to’ reduce the ‘original error

3-2

Fig. 3-2. Feedback amplifier (Single-ended version)

TM ll-6625-2749-14&P

The input to the modifier (the system output) is curately related to the system input, provided the is constructed of stable components.

Another way of looking at the system is to start at the output and work backward. Specifically, assume an amplifier gain of 10,000 and divider. Assume volt, and the error signal (output-gain) input is 1.001 valts. In this case, the errar between the desired output [1 OX input) of 10.01 volts and the actual output of 10.00 volts is only 10 mV, or 1 part in 1,000.

practice the comparator and error amplifier are often combined in of the basic configuration used in the Type 7A22 is illustrated in Fig. 3-2, with the basic blocks of Fig. 3-1 identified. The comparator is FET Q,. Any change in the gate-to-source

bias voltage [dictated by the standing current established by R, and the supply voltages) will cause

current, the change being applied as an error signal to the

input of the error amplifier.

The error amplifier consists of grounded emitter stage Q, driving emitter fol[ower Q,. The internal output appears at the emitter of modifier [voltage divider) Rz, tem output, V.,,

can be

feedback modifier which isa 10X

a 10

volt output. The modifier output is 1

differential amplifier. A single-ended version

and is fed back ta the comparator input via

R1.

determined by:

is 1

mV, so that the

change in drain

For this amplifier, the sys-

also ac-

modifier

Since

Vom is

then

the

R, 1?,

“

The useful output of the amplifier is the Q, collector signal current small error current from QJ. VOm = ioRl and since approximately equal to Vi, and i. is approximately equal to

iO’ then i. is approximately equal to —

cur-rent vs. the input voltage depends primarily on the gainsetiing resistor,

An output voltage through t-he load resistor,

—,which

cspproximcrtely equal to the input voltage Vi,

system gain, ~,

io’,

which flows through RI (in addition to the relatively

R1.

can

approximately equci[ to—

is approximately equal to 1 +

Thus the output

RI “

also be obtained by passing i.

R~.

The overall voltage gain is then

“

Vo~

Differential Configuration

If the lower end of R, is connected to the same point in

another identical circuit instead of being returned to ground, the result is output, which is the configuration in the Type 7A22. A dif-

ferential feedback amplifier, such as is used in the 15X pre-

amp, is shown in Fig. 3-3.

From the previous description, the Ql, and Qlb source voltages VO. Vi~ respectively,

result in

in turn is due to an output signal current

differential feedback amplifier with push-pull

and

follow the input voltages Vi. and

hence

any differential input voltage, Vi will

nearly equal source to source voltage VO., which

i~’

R; +

R1~

Fig.

3-3.

Feedback

amplifier (Differential configuration).

Note that FETs have been used in Q,, rather than NPN bipolars as in Fig. 3-2 to avoid loss of signal current from the base lead. The operation of the amplifier remains unchanged.

DETAILED CIRCUIT DESCRIPTION

Input Coupling (See Schematic 1)

Input signals applied to the +input connector

coupled or internally disconnected. When the input cou-

pling switch, S101 DC position, the input signal is coupled directly to the input

attenuator. through coupling capacitor Cl 01, and the DC component is blocked from the input amplifier. The GND position internally connects the gate of the input amplifier to ground. This provides

removing the input leads or otherwise disconnecting the input signal.

Resistor R103 allows C101 to position so that when S101 is switched to the AC position

with

surge into the input of the amplifier. Excessive loading is also avoided for the circuit under test, since the normal im-

high DC level applied, there is no charging current

(see X 15

In the AC position, the AC signal is coupled

ground reference for the amplifier without

preamp diagram), is in the

precharged in the GND

can be

3-3

TM 11-6625-2749-14&P

pedance of 1 MQ-47 pF is still seen by the signal source. —input switch, S201, functions in the same manner as +input.

The

the

Input Attenuators

To produce the vertical deflection factor indicated on the front panel by the VOLTS/DIV switch, the gain of the feedback amplifier in the gain switched amplifier circuit is

changed by switching the source resistor (R407) of Q404

A and B (See Schematic 2 ) for switch positions 10 µV to

10 mV. For switch positions above 10 mV, input attenuators are switched by S108 into the input circuit of the Type 7A22, in conjunction with the gain switching resistors, R407, to

produce the selected deflection factors.

These attenuators are frequency-compensated voltage

dividers. For DC and low frequency signals, they are pri-

marily resistive dividers (e. g., R108C, R108D) and the voltage attenuation is determined by the resistance ratio in the cir-

The reactance of the capacitors in the circuit is so high

cuit. at the lower frequencies that their effect is negligible. However, at higher frequencies, the reactance of the capacitors decreases and the attenuator becomes primarily a capa-

citive voltage divider (e.g., C108C, C108D).

In addition to providing constant attenuation at all frequencies within the bandwidth of the instrument, the input attenuators are designed to maintain the same input RC characteristics (1 megohm in parallel with 47 pF) for each setting of the VOLTS/DIV switch. Each attenuator contains an adjustable capacitor (e.g. C108C) to provide correct attenuation at high frequencies, and an adjustable shunt ca-

pacitor to provide correct input capacitance.

Gate Current Compensation

The leakage current associated with the gates of the input FETs may be as high as 100 pA. This 100 pA of leakage current (through 1 megohm to ground, R111 or R211) will produce an offset of 100 µV, which at high input sensitivities is not acceptable. To compensate this effect, the gates of the input FETs may be adjusted to zero volts by returning R111, R211 through variable controls R115 and R215 to a slightly negative supply voltage (see Fig. 3-4).

Leakage current associated with the gates of the input

FETs and the overdrive protection diodes increases rapidly

with temperature, approximately doubling for every 10” C. To compensate this increase, a temperature sensitive input current balancing network is included, using thermistors as

the sensing elements.

As the voltage across R111 and R211 increases due to increasing FET gate current at increased temperatures, an equal

voltage change is produced in the thermistor compensating circuit, maintaining the FET gate level at zero volts.

The gate current compensation becomes inoperative if the

straps are removed for high input impedance operation.

Input Amplifier

The input amplifier circuit in the Type 7A22 is made up

of two identical feedback amplifiers connected in a differ-

Fig. 3-4. Gate Current Compensation.

ential configuration with a push-pull output. The power supply voltages (except at the output) for each feedback amplifier are obtained from a power supply that is boot-

strapped to the common-mode input signal. This improves

the CMRR of the amplifier, Input overdrive protection is provided in the input circuit to prevent damage to the semiconductors if a large overdrive is inadvertently applied to the input.

Any amplifier of this type, in which the feedback is taken

to the input element, is likely to exhibit a negative resistance

component of impedance at higher frequencies. If the input

signal source impedance is inductive with a sufficiently high “Q”, the amplifier could oscillate. C115, R116, R117 and C215, C217 compensate for this negative input resistance.

X 15 Preamp. The feedback amplifiers in the + and — inputs are identical except for circuit numbers, and operate in a coupled differential mode as described previously under-

feedback amplifiers.

In the actual circuit (see Schematic 1 ) the + feedback amplifier consists of the comparator Q133A, error amplifier Q144A, Q153, feedback modifier R151, R153 and output load

resistor R159. R151 is the gain setting resistor for the ampli-

fier, and the approximate gain of the amplifier can be de-

Diode CR131 is used for temperature compensation of the base-emitter junctions of Q144A and Q144B. This keeps the total voltage across the input stage current-setting resistors R133, R233 constant with temperature, Diode CR144 con-

nected between base-emitter of Q1 44A, protects the transistor against reverse base-emitter breakdown. Cl 44 and C244 stabilize the circuit at the higher frequencies.

DC Balance. The DC level at the output of Q153, Q253

is balanced by R258, STEP ATTEN DC BAL. The STEP ATTEN

3-4

TM 11-6625-2749-14&P

Fig 3-5. Common-mode Rejection using floating power supply.

DC BAL control changes the current through R257, R259, thereby changing the DC ksbance. It is used to adjust the difference in potential across the output of the X15 Preamp (pins Z and W) to zero with the input coupling switches at GWD and the LOW FREQ –3 dB POINT switch set to DC.

With high frequency common-mode signals the wiring

stray capacitance of the X 15 preamp

current into the two output lines at high frequencies. C330

csd~usted to

frequency range over which useful CMRR

Floating Power Supply. The supply voltages for the

X 15 preamp regukstors, VR305, VR320 and VR325 connected in series. Current is supplied by twa current sources, Q304 and Q324.

equcrlize these currents, thus extending the

csre

obtained from

can

iniect undesirable

can be

chain of Zener diode shunt

obtained.

C307, C317 and C325 filter out the Zener noise. C315 in-

creases the bootstrap stability at higher frequencies.

Any common-mode changes that occur in the input amplifier, except at the output, are coupled to the power supply through Q314. Q314 is an emitter follower whose gain is maintained very close to unity by the minimum loading presented to its output by the high collector impedance of Q304 and Q324, thus achieving good bootstrap efficiency.

Common Mode Reiection. One of the primary func-

tions of the X 15 preamp is to reiect any common-mode component in the input signals, and amplify only the difference. In the extreme case of the inputs tied together and voltage applied, the output of the amplifier is ideally zero, and would actually

zero provided that the characteristics

common

3-5

TM 11-6625-2749-14&P

Fig.

3-6.

Input

of all corresponding elements on the two sides of the ampli-

fier (see Fig. 3-5) were exactly matched. In proctice any

mismatch will cause matching, there is still

differential output. Even with perfect

common-made output current resulting in an undersiroble common-mode signal applied to the subsequent stages of the amplifier (common made gain).

The floating power supply eliminates these difficulties and improve the CMR. Suppose the input to the bootstrap amplifier is connected to the junction of R151 and R251 3-5]. It

can be

amplifier moves and that where within the amplifier as

seen that now the entire power supply and

amount equal to Vcm [ie: follows

changes in voltage or current levels occur any-

result of Vcm, except for

(see

Fig.

Vcm]

Q153 and Q253 drain to gate voltage. Thus the only mismatch of importance is that of Q153, Q253 amplification

3-6

cross neutralization.

factors, and being in the third stage of the amplifier at a

point af relativel~ large differentia~ signal Ievel, ”this causes only

small degradation

CMR.

At higher frequencies the inevitable stray capacitances

from various points in the X 15 preamp to ground begin to

inject significant current into the amplifier as

result of common mode signals. The differential capacitor C330, (Fig. 3-5 or Schematic ~ ) connected from

point in the floating power supply to the two output lines, is used to inject adjustable currents into

the

output. It

can be

adjusted ize the net output currents resulting from high frequency common mode signals ond so extend the range of frequencies over which useful CMRR

Cross Neutralization.

power supply results in

can be

obtained,

The use of

common bootstrap

undesirable capacitive coupling

equal-

Ix%-weerst

volt to the +-input while keeping the — input at O volts (see

Fig. 3-6).

The results are cmd (b) a age levels by +0.5 V due ta the divider action of R151, R251 operating into the bootstropped power supply system. Specifically, the drain of Q133B also rises +0.5 V and iniects cs current ilb through the drain to gate capacitance of Q133B and into the —input. If there is any impedance between the

—input and ground, il~ will develop which, being applied to the —input subtracts from the original +input and causes an erroneous output (see Fig. 3-7).

Note that the output current flowing through R253 causes its output end (Q253 source) to go to —0.6 V. A capacitor, C241, connected from this point to the –input

iust to diver-t i,~ away from the input line (ilb) and so neutralize the effect of Cdg and reduce the —input current to zero. R141 and Cl 41 perform

+input.

Input Overdrive Protection.

and B, being semiconductors large overdrive applied directly to them, some input protection is tection system used in the Type 7A22 are shown in Fig. 3-8A.

There are two different kinds of overdrive associated with

the Type 7A22,

grounded, and

;ately equal inpu~ voltages.

(cm] Assume the –input grounded and voltage on the + input. The chart in Fig. 3-8B indicates the seque-nce of can

present, the +-input remains at +16,5 V, with the overdrive

current flowing to ground as shown in Fig. 3-8.

Now assume the +input grounded and creasing —voltage on the —in~ut. The seauence of events

is show; in Fig. 3~8C.

Fig.

3-7.

hetwo inputs. Consicfer the effect of applying +1

(a) an

shift of all supply voltages and several other volt-

necessity. The important components of the pro-

(a)

(b)

events:”

supply 1 /16 amp of current. If this much current is not

Effects

of high impedance to ground in

output current of 4 mA, as shown,

voltage across it

can be

similar function for the

Since the input FETs Q1 33A

can be

single-ended overdrive, with one input

common-mode overdrive, with approxi-

F1 19

will open if

destroyed by sufficiently

steadily increasing

~he +

signal source

steadily in-

the

—

INPUT.

ad-

TM 11-6625-2749-14&P

(b)

For common-mode overdrives the clamping sequence is essentially similar, except the X 15 amplifier does not overload, and the current iz does not flow until the input reaches approximately —13 V. The fuse opening current

paths are shown in Fig. 3-8A.

For differential overdrive the action is the + and — single-ended sequences, with the —input supplying

i2.

(In effect inputs when the differential voltage reaches 3 V). The fuses will not open until one or both inputs reach +16.5 V or –1 6.5 V.

DC Offset.

allow

differential slideback measurement, i.e.: to buck out small DC components of input signals and allow the amplifier to amplify only the varying components, while

keeping the differential capability. This means that when voltage is applied across the inputs, some means must be found to balance out the resultant output current. Fig. 3-9 illustrates how this is done.

Fig. 3-9A shows the standing currents for zero input. Fig.

3-98 shows the currents with

+input. This would cause an i.’ of 1 mA to flow through R151, R251. However, if this 1 mA is supplied as shown by the offset generator, then no net output current results. Both the Q1 33A and Q133B source currents and the output standing currents, iO’, remain at their zero signal value, 2 mA and 5 mA respectively.

Offset Generator. The offset generator produces the

adjustable balanced offset current for use in the X 15 preamp. Due to the wide range of the offset system (200,000 div at 10 NV per div) stable components are used and circuit techniques which minimize drift and noise are employed in the

offset generator.

control is used to obtain adequate resolution at low deflection factors.

The functional arrangement of the offset generator is shown in Fig. 3-10. In the reference voltage generator the OFFSET control, R270, taps an adjustable portion (Vlb) of the voltage across the reference Zener VR270, and age (Vl.) is taken from the voltage divider formed by R271, R279 (approximately 50% of the reference voltage); thus, the difference voltage (Vlb–VIJ is adjustable over the range of at least —4 V to +4 V.

This adustable difference voltage is applied to the inputs of

balanced feedback amplifier conceptually similar to that described previously under differential configuration. In amplifier

“A”, the feedback action forces the —input voltage

(also the output voltage) V,, to follow the +input V,.. In

similar manner, vzb follows Vl~ in amplifier “B”. The differ-

ential input (V~b—V~,) is therefore reproduced across resistors

R287, R289. The resultant current, ——, , ,.

Ieff,.+”, flows through the FET (Q273, Q283) output stages

of the amplifier and out their drains to the X 15 preamp.

When the offset is not in use V,b is switched to the fixed divider (R273, R277) by the OFFSET ON/OFF switch (part of the LF —3 dB POINT switch). V1. is adjustable over

range with respect to Vlb by the COARSE DC BAL control, whose purpose is to adiust out any initial DC unbalance in the X 15 preamp, and to bring its output to zero with zero

input.

a 5 k~

The purpose of the DC offset system is to

A 10 turn coarse and 1 turn fine OFFSET

resistor is connected across the

0.25 V DC input applied to the

vzb—v~,

R287+R289

combination of

fixed volt-

which is

small

3-7

TM 11-6625-2749-14&P

Fig. 3-8.

In the actual circuit, the reference voltage generator is modified by the addition of which changes the effective range of the 10 turn COARSE

potentiometer by means of two voltage dividers, one connected to each filters out Zener noise from the reference voltage.

The feedback amplifiers A and

Q273 and Q264B, Q283 respectively, with the reference in-

put applied to the emitters of dual transistor Q264 and the

feedback to its bases. Current source Q284 supplies oper-

sting current for the amplifiers.

3-8

(A) Overdrive Protection System showing current paths.

FINE OFFSET control (R265),

end of the COARSE control. A capacitor

are composed of Q264A,

(B, C) Sequence of events leading to excessive overdrive.

Input Overdrive Indicator.

selector is in indication of the DC conditions in the X 15 preamp, and it

may

ponent, leading to erroneous displays. The input overdrive indicator detects this condition and indicates by means of warning light that the X 15 preamp is approaching the limits of its dynamic range.

The indicator consists of CR343, In the

position other than DC, there is

driven into non-linearity or overload by

Q344) and

quiescent state, while

monostable lamp driver (Q334, Q354).

When the LF –3 dB POINT

threshold detector (CR341,

overdrive exists,

on-screen

a DC

CR341,

com-

TM 11-6625-2749-14&P

Fig. 3-9.

CR343, Q344, Q334 and Q354 are all cut off. R341 and R343 form detector, Q344, at approximately -I-32 V.

+33.4 V; cm Q334 via R347. Q334 collector current turns on Q354 via R333, and the resulting negative going step at Q354 collector turns on the lamp. This causes current in R349 to turn Q334 cm Ivimder. If the overdrive is removed immediately, Q344 turns off. However, the current through C349, R349 keeps Q334, Q354 and the [amp on until C349 is charged to its new voltage (approximately through R337 exceeds that in R349, R337. This keeps Q334 off for approximately other overdrive signal., Thus far repetitive overdrives, (up to about 10 Id-lz), the monostable free-runs and the lamp flashes at approximately high speed AC effectively charges up the stray capacitance and makes the circuit act as if it had however, discharge does not turn Q334 off since it is kept on by current through R347. Thus, the lamp stays on until the overdrive is removed.

frequency –3 dB point of the amplifier and has O.1 Hz to 10 Id-lz in decade steps. Selection is done by switching the resistor and capacitor of in each leg of the amplifier. Fig. 3-11 shows half of the selector, with the switch split up into its functional elements.

voltage divider to set the emitter of the threshold

Now suppose one of the X 15 preamp output lines exceeds

CY!341

a DC

– 3 dB POINT Selector. This switch selects the law

[or CR343) and Q344 collector current turns

second, even if Q344 receives an-

a 2

overload keeps Q344 on, the end of C349

Offset system showing (A) Conditions with zero offset, (B) 0.25 V DC offset.

second) and the current

second rate. (Above 10 kHz the

a DC

pair of capacitor couplings

overload.) If,

range of

For the 100 Hz to 10 kHz positions, Cl 56 is used and re-

sistors R353C, R353B and R353A are switched to the output in

the following combinations:

—3 dB frequency 1100 Hz I

output resistors I R353C I R353 & R353B I R353C & R353A

Whenever R353A or R353B is not on the output side of Cl 56, it is placed across the input, to keep the high frequency load resistance seen by Vin constant.

C353A is switched across Cl 56 for the lower 3 ranges,

(0.1

Hz, 1 Hz and 10 Hz) and C156 is shorted out for DC coupling. Resistor R157 adds C156 is used to compensate for the loss of gain through the capacitive divider farmed by Cl 56 and stray capacitance

c,.

When the 0.1 Hz to 10 Hz positions are in use, C353A may be rapidly pre-charged by switching to the 10 Hz position momentarily.

1 kHz

small increment in gain when

10 kHz

OUTPUT AMPLIFIER (See Schematic)

Gain Switching Amplifier

The gain switching amplifier [Q404, Q414, Q424, Q524) is

balanced differential configuration very similar to the X 15

preamp but with

accomplished by switching R407.

fixed power supply. Gain switching is

@J_

3-9

TM 11-6625-2749-14&P

Fig. 3-10. Functional

Diodes CR413, CR513 prevent base-emitter reverse breakdown in Q414under overdrive conditions: CR419, CR5191imit the output current that CR417 and CR515, CR517 prevent the bases of Q424, Q524 from swirwina too far from the emitter, ~reventina breakdawn and ensur;ng-a fast, clean overdrive ;ecovery. ~he AC STEP ATTEN BAL adjustment (R505) in series with the source of Q404B, develops any initial unbalance in the gate-to-source voltages of Q404 A &

The AC STEP ATTEN BAL also sets the voltage across

3-10

can

flow through Q424, Q524. CR415,

small adjustable voltage which removes

arrangement

of the offset

gain-setting resistor R407 to zero when the differential input

(gate-to-gate) voltage is zero.

VAR BAL (R425) is used to balance the output currents of

Q424 and Q524 with zero input

The gain switched amplifier has excellent overdrive characteristics so that the full dynamic range of the input amplifier can be

1,000:1 with characteristics,

generator.

the amplifier.

It is gain-switched over

used.

significant change in bandwidth or any other

range of about

Variable Output Stage

The

variable output stage (Q434, Q534) does not contribute much voltage gain, but tions.

The

ter amplifier signal current vs. input voltage) being determined by the total emitter to emitter resistance. a 2.5:1 range by the fine polates between the steps of the VOLTS/DIV switch.

configuration

with emitter degeneration, the gain (collector

control of gain in the uncalibrated position, and inter-

performs a number of other func-

is a

collector loaded, common emit-

This

VAR

resistance

control, R535, which provides a

ad@sted over

TM 11-6625-2749-14&P

POSITION control rents into the emitters of This

current adds to veloped in the emitter out of the collectors into the signal and plifiers.

obtained by feeding adjustable cur-

Q434, Q534,

subtracts from the signal current de-

resistors

via

resistors

R432, R535, R532, and

trigger

R431, R531.

output am-

flows

Signal Output Amplifier

R443, R543 equalize the power in rscsmic conditions, thereby eliminating thermal C543 are high-frequency by-pass capacitors.

Q444, Q544

distortion.

under dy.-

C44d,

Trigger Output Amplifier

The trigger to the signal output stage, except the stage gain justable, sa that the output, signal output level, can in fact have quite a wide tolerance.

output stage (Q454, Q554)

while

nominally the same as the

almost identical

not ad-

INDICATOR OSCILLOSCOPE

READOUT

General

Fig. 3-11. Partiol

amplifier.

the symbol V (volts). R618J and R618M select the symbol > when the position. Refer to the Schematic Diagram of the VOLTS/DIV Switch to find the

ting of the VOLTS/DIV switch.

VARIABLE

Low Frequency

VOLTS/DIV knob

resistors

—3 dB Point selector

is in

associated

with a

for + Input

the uncalibrated

particular set-

Probe Sensing

The

probe sensing device (Q614) identifies the attenuation of the probe connected to the sensing the amount of current

through the probe coding resistance, and adiusts the readout display so that the actual probe tip deflection factor displayed.

The

probe connected to the + (or —) INPUT connector forms a voltage the

—15 V

lowing current to Q614. The by the probe coding resistance of the

When nector B33, (detrmined by the base voltage and emitter is

added to the column current through interface connector

A37.

divider with

supply.

This

flow

through R630, reducing the bias on

bias voltage, applied to the base of

the

—15 V

Q614 is

clock pulse

interrogated and its collector currents

front

panel connector, by

flowing

R61O (R620) through CR615 to

forward biases CR61O (CR620) al-

from the current

divider

applied to interface con-

Q614, is

probe.

resistor,

sink

set

R614)

3-11

TM 11-6625-2749-14&P

With a 1 X probe (or no probe) connected, Q614 is turned off, and the deflection factor, in the readout display, is determined by the setting of the Readout Switch, S407, (part of the VOLTS/DIV switch) only.

With a 10X probe connected to the input ( + or –) , the

bias on Q614 will allow 100 µA of collector current to flow.

This increases the deflection factor (in the readout display)

by a factor of 10.

When different-attenuation divider probes are connected

to the + and — INPUT connectors, the displayed readout will be the probe tip deflection factor of the larger divider.

For example: if a 10X probe is connected to the +INPUT and a 1OOX probe is connected to the —INPUT the readout will display the deflection factor at the tip of the 1OOX

probe. The 100X probe will set the bias on Q614 to allow 200 µA of collector current which will increase the deflection factor (in the readout display) by a factor of 100.

This means that the Indicator Oscilloscope displayed readout will give the correct deflection factor from the probe tip, for o single probe or two probes having the same attenuation factor, whereas the VOLTS/DIV knob on the plug-in will dis-

play only the plug-in deflection factor.

Trace Identify

The TRACE IDENTIFY button, when pressed, does two

things:

1. It causes the troce, representing the output of the Type

kfl

7A22, to move a small amount by inserting a 2

R622, from ground through CR630 to the junction of R632 and R634. This shunts a small amount of the output current causing the trace to move.

2. Forms a voltage divider from the —15 V supply through R630 and R622, placing the base of Q614 at approximately —1.5 V. This low value of bias will cause Q614 to turn on hard (1 ,000 µA collector current) when interface connector B33 is interrogated, erasing the readout display and causing the word “IDENTIFY” to appear.

These two actions aid in identifying the Type 7A22 trace when multiple traces are displayed. When the IDENTIFY button is released, the readout is restored to its previous display.

For more specific information on the operation of the

system, refer to the appropriate Indicator Oscilloscope

manual.

resistor,

3-12

SECTION 4

MAINTENANCE

TM 11-6625-2749-14&P

Introduction

Information which will aid in keeping the Type 7A22 operating at Cleaning, lubricating and visual inspection hints are included under preventative maintenance. The section on corrective

maintenance includes troubleshooting cedures. Parts identification and soldering techniques are included where necessary.

its

peak performance is contained in this section.

and corrective pro-

PREVENTIVE

General

The instrument should be cleaned, inspected and recalibrated at regular intervals. average operating conditions is every 6 months or every

1000 hours of operation, whichever occurs first.

The recommended interval for

Cleaning the Front Panel

Loose dust may brush. Water and mild detergents such as Kelite or Spray White may be use&

Avoid the use of chemical agents which mighf damage the plastics used in fhis unif. Avoid chemicals such as benzene, toluene, xylene, acetone or similar solvents.

removed with clath and

CAUTION

dry painf

Visual Inspection

The unit should as poor connections, broken or damaged circuit boards, improperly seafed transistors and heaf-damaged parts. The

remedy for most visible defects is obvious. However, damage from overheating is usually and unless the cause is determined before parts are replaced the damage may be repeated.

inspecfed occasionally for such defects

sympfom of less obvious trouble;

Transistor Checks

Periodic preventive maintenance checks on the fransisfors

used in the unit are not recommended. The circuits within

the unit generally provide the most satisfactory means of

checking transistors usability. thoroughly checked during recaiibraficm, and substandard transistors will usually

Performance af the circuits is

detected at that time.

Calibration

To insure accurate measurements, the Type 7A22 calibration should every six months if used intermiftenfly. Complefe calibration instructions are contained in Section 5.

The calibrated procedure

major froubles in the unit. apparent during regular operation may corrected during calibration.

checked affer each 1000 hours of operation or

can be

Moreover, minor fraubles not

helpful in isolafing

revealed and

Cleaning the Interior

CJxsning of the interior of the unit should precede cali-

bration, since the cleaning process might alter the settings of

the ccslibrafion adiusfments.

To clean the interior, use Iow-velocitv comm-essed air fo blow off the accumulated dust. High ‘veloci;y air sfreams shauld be avoided to prevent damage to components.

WARNING

Use an eye-shield when cleaning with pressurized

air. Hardened dirt can be removed with brush, cotton tipped swab or cloth dampened wifh a

water and mild detergent solution. Avoid the use of chemical cleaning agents fhat might damage the plastic parts.

paint

CORRECTIVE MAINTENANCE

General

Replacement of some by follawing as soldering-and replacing components on the circuif boards, are ouflined in this portion of the manual.

Many electrical components are mounted in way to reduce or control stray capacitance and inductance. When selecting replacement parts, it is important to remem-

ber thaf the physical size and shape of

affect its performance at high frequencies. When

is mode, calibration and performance of the relevant por-

tions of the circuit should be checked. Refer fo Table 4-1

and fo the Performance Check/Calibration

Section 5 and perform the applicable sfeps.

definite

parts in the unit should

procedure. Some procedures, such

dane

particular

component may

repair

procedure

4-1

TM 11-6625-2749-14&P

TABLE 4-1

Areas

Repair

Input Coupling switches and cable:

Input Attenuators Preamp

LF –3dB POINT

Overdrive Indicator Gain Switched Amp

Offset Generator

Output Amplifier

Obtaining Replacement Parts

Standard Parts. All electrical and mechanical part re-

placements for the Type 7A22

local Tektronix Field Office or representative. many of the standard electronic components tained locally in less time than is required to order them from Tektronix, ment parts, and description.

Inc.

check

Checks and Adjustments

Affected

Input

and C,

Attenuator pensation,

LF response, Gain 1X iriput”

Neutralization,

BAL, CMRR Comnon-Mode dynamic

range, Differen-

tial dynamic range,

Offset range, Noise, Input protection system Gain, 1 MHz freq.

response, Overdrive indicator

Gain, LF freq. response, 1 MHz freq. response

Dynamic range

Gain,

factar tracking, AC Atten Bal, HF –3 dB POINT, 1 MHz freq. response, Overdrive ery Variable Balance

Offset Range, DC

Bal, CMRR HF –3 dB POINTS,

Var balance, Variable ranqe, Gain

8efore purchasing or ordering replace-

the parts lists for value, tolerance, rating

CMRR,

Deflection

recov-

can be

com-

Cross

obtained through your

Section 5

Calibration

Step

6, 13, 14, 15, 16,

17, i8, “19,’

21,

3, 6, 10, 11, 12 13, 14,

23,

20, 21

23, 24 1,

2:6,

20, 26

10, 22

2, 6, 7, 20

can be

20;

20, 22,

”8

However,

ob-

mechanical parts should Field Engineer or Field Office. See Parts Ordering information and Special Notes and Symbols ately preceding Section 6.

Soldering Techniques

Circuit Boards. Use ordinary 60/40 solder and

to 40-watt pencil type soldering iron The tip of the iron should for best heat transfer soldering iron may separate the base material.

The following technique should component on the circuit board. Most components replaced without removing the board from the unit.

Grip the component lead with long-nosed pliers. Touch the soldering iron to the lead at the solder connection. Do not touch the soldering iron tip directly it may damage the board.

2. When the solder begins to melt, pull the lead out gently. This should leave the hole ing into the hole to clean it out.

in the board. Cut the leads of the new component to the same length as those of the old component, Insert the leads into the board until the component is firmly seated against the board, or as positioned originally, If it does not seat properly, heat the joint, and gently press the component

nection to make components, hold the lead between the component body

and the solder joint with

heat sink

flux-remover solvent to maintain good environmental characteristics and appearance. formation printed

can be

sharp oblect, such as

3. Bend the leads of the new component to fit the holes

into place,

4. Apply the iron and

5. Clip the excess lead that protrudes through the board.

6. Clean the area around the soldered connection with

(see

Fig. 4-l).

ordered through your Tektronix

the page immedi-

the circuit boards.

be-

clean and properly tinned

the solder joint. A higher wattage

etched

clean hole in the board. If not,

cleaned by reheating the solder and plac-

toothpick or pointed tool,

firm solder ioint. To protect heat-sensitive

small amont of solder

pair of long-nose pliers or other

careful not to remove in-

the board.

wiring from the

used

replace

can be

the board, as

to the

con-

35-

NOTE

When selecting replacement parts, it is important

to remember that the physical size and shape of

the component may affect its performance

instrument, replacement unless it is known that not adversely affect instrument performance.

Special Parts. Some parts are manufactured or selected

by Tektronix factured for Tektronix to our specifications. These and most

particularly

parts should be direct replacements

satisfy particular requirements, or are manu-

high frequencies.

different component will

the

All

4-2

Fig. 4-1. Removing or replacing component on circuit board.

TM 11-6625-2749-14&P

CAUTION

Silk-screen flux-remover.

Metal Terminals. When soldering metal terminals (inter-

connecting plug pins, switch terminals, potentiometers, ordinary 60/40 solder can be used. The soldering iron should have chisel-shaped tip.

Observe. the following precautions when soldering to

metal terminals:

1. Apply heat only long enough to make the solder flow

freely.

2. Apply only enough solder to form

excess solder may impair the function of the part.

3. If

cess close to the ioint.

4. Clean the flux from the solder ioint with a flux-remover

solvent to maintain goad environmental characteristics and

appearance.

lettering dissolves when contacted by

etc.)

40- to 75-watt rating with

wire extends beyond the solder ioint, clip the ex-

1/8 inch wide

solid connection;

Specific Component Replacement Information

WARNING

Disconnect the instrument from the power source before removing or replacing components.

The pushbutton switches are not repairable and should be replaced if defective. Components which are mounted on the circuit board associated with the pushbutton switch can be See the information under Light-Bulb Replacement for bulb replacement. Use the following procedures to replace the +-INPUT and —INPUT pushbutton switches.

DC OFFSET shafts.

dual DC OFFSET potentiometers out of the front panel and lift them out of the way.

AC-GND-DC switch.

parsel.

replaced using the normal replacement procedure.

AC-GND-DC ( + INPUT) Switch

Set the front panel controls as follows:

POSITION STEP ATTEN DC BAL

VOLTS/DP4

HF –3 dB POINT LF –3 dB POINT DC OFFSET (FINE) DC OFFSET (COARSE)

b. Remove all front panel knobs.

c. Remove the GND binding post assembly.

cf. Remove the nut and washer from the POSITION and

Remove the plastic bushing from the VOLTS/DIV

f. Remove the front panel overlay.

g. Without unsoldering any leads, carefully push the

Unsolder and unplug the connecting leads from the

i. Remove four corner screws and remove the front sub-

Midrange

10V

1 MHz

DC OFFSET Midrange 5 turns from either extreme

shaft.

i. Remove the two screws securing the AC-GND-DC

switch to the front sub-panel and remove the switch.

k. Replace by reversing the above procedure.

AC-GND-DC [ -

a. Perform step 1, parts

nent Replacement.

b. Loosen the setscrew on the collar connecting the GAIN

shaft to the pot coupler and pull the shaft out of the front

panel.

Unsolder and unplug the connecting leads from the

AC-GND-DC switch.

d. Remove the four corner screws and remove the front

sub-panel.

Remove the two screws securing the switch to the front

panel.

f. Remove the switch. g. Replace by reversing the above procedure.

INPUT)

Switch

through f, of Specific Compo-

3. Light-Bulb Replacement, + INPUT and - INPUT Push-Button Switches

Two types of pushbutton switches which have different

light designs are in use. One switch design uses cover over the light bulb(s) on the back of the switch; the

other type does not. Either or both types of switches may be used in the 7A22.

To replace light bulbs in the pushbutton switches, use the

following procedure:

a. Remove the applicable INPUT switch as described in

steps 1 and 2.

b. On switches with the metal cover, remove the screw

holding the cover and remove the cover.

Clip off the bulb leads near the bulb body. d. Remove the leads from the circuit board. e. Remove the excess solder from the circuit board with

vacuum-type resoldering tool.

f. Solder the new bulb to the circuit board (replace

cover).

g. Replace the switch in the instrument.

Bandwidth Circuit Board

a. Set the LF and HF —3 dB POINT Selectors to either

extreme.

b. Loosen the setscrews securing the LF –3 dB POINT

shaft to the collar on the cam switch. Pull the shaft forwrsrd until it clears the collar.

Loosen the setscrews securing the HF —3 dB POINT

shaft to the collar on the cam switch. Pull the shaft forward

until it clears the bandwidth board.

d, Loosen the setscrew securing the GAIN shaft to the collar on R540. Pull the shaft forward until it clears the bandwidth circuit board. Loosen the setscrew securing the collar

to R540 and remove the collar.

Loosen the four circuit board retaining screws and lift

out the Bandwidth Circuit Board.

f. Unclip the AP, AO, and D.

g. Replace by

leads from solderless connectors

reversing the above procedure.

metal

A, AN,

4-3

TM 11-6625-2749-14&P

CAUTION

Repair of cam-type switches should be undertaken only by experienced personnel. Switch alignment and spring tension of the contacts must be carefully maintained for proper operation of the switch.

Far assistance in maintenance of the cam-type switches, contact your local Tektronix Field Office or representative.

5. Cam-Type

A cam-type switch repair kit including necessary teals, instructions and replacement contacts is available from Tektronix, Inc. Order Tektronix Part No. 040-0541-00.

The cam-type switch consists of a rotating cam, which is rotated by a front-panel knob, and a set of contacts mounted on the adjacent circuit board. These switch contacts are actuated by lobes on the cam. The VOLTS/DIV, LF -3 dB POINT and HF -3 dB POINT cam-type switches can be disassembled for inspection, cleaning, repair or replacement, as follows:

A. LF -3 dB POINT and HF –3 dB POINT Switches

1. Remove the Bandwidth board as described in step 4.

2. Remove the two screws which hold the metal covers in place. (The front switch on the Bandwidth board is the LF -3 dB POINT Selector and the rear switch is the HF

-3 dB POINT Selector). The switches are now open for

cleaning or inspection.

3. To completely remove either of the two switches from

the board, remove the four screws (from the back side of

the board) which hold the cam assembly to the circuit

board.

4. To remove the cam from the front support block, remove the retaining ring from the shaft on the front of the switch and slide the cam out of the support block. Be careful not to lose the small detent roller (between detent and detent spring).

5. To replace defective switch contacts, unsolder the damaged contact and clean solder from the hole in the circuit board. Position the new contact in the hole in proper alignment relative to the other switch contacts and with the mating area on the circuit board (alignment tool

provided in switch repair kit). Solder the new contact into place; be sure that the spring end of the contact has ade-

quate clearance from the circuit board.

6. To re-install the switch assembly, reverse the above

procedure.

Switches

NOTE

4. Loosen the set screw which secures the VARIABLE

shaft to the VARIABLE control assembly.

5. Pull the VARIABLE shaft through the front of the in-

strument.

6. Remove the 4 screws (from the rear side of the board)

which hold the rear cam assembly to the circuit board.

7. Remove the rear cam assembly.

To remove the front cam switch assembly, perform the pre-

ceding steps and then proceed as follows:

1. Remove the VOLTS/DIV knob.

2. Loosen the ½-inch hex bushing nut which secures the

front support block.

3. Remove the plastic bushing from front of panel.

4. Remove the retaining ring from the shaft at the front

of the switch.

5. Remove the 4 screws which secure the support blocks

to the board.

6. Loosen the 2 set screws in the half of the flexible

coupling and remove coupling.

7. Remove the rear support block by carefully lifting the block away from the circuit board far enough to clear the alignment prelection on the bottom of the block. Carefully slide the rear block toward the rear (off the shaft).

8. Slide the cam shaft carefully (keep cam lobes clear of contacts] out of the front support block and bushing assembly.

9. To re-assemble, reverse the above procedure.

Interconnecting Pins

6. Interconnecting pins are used on the Type 7A22 to inter-

connect circuit boards. When interconnection is made at a circuit board, the pin is soldered into the board. Two types of mating connectors are used for these interconnecting pins. If the mating conector is mounted on a plug-on circuit board, a special socket is soldered into the board. If the mating connector is on the end of a lead, an end-lead pin connector (which mates with the interconnecting pin) is used. The following information provides the replacement procedures for the types of interconnecting methods.

A. CIRCUIT-BOARD PINS

NOTE

A pin replacement kit including necessary tools, instructions and replacement pins is available

from Tektronix, Inc. Order Tektronix Part No. 040-0542-00.

B. VOLTS/DIV Switch

1. Remove the Bandwidth board as described in step 4.

2. Remove the two screws which hold each of the

metal switch covers in place.

3. Push the VARIABLE (CAL IN) to the ‘IN’ position.

4-4

To replace a pin which is mounted on a circuit board, first disconnect any pin connectors. Then unsolder the damaged pin and pull it out of the circuit board with a pair of pliers. Be careful not to damage the wiring on the board with too much heat. Ream out the hole in the circuit board with a 0,031 -inch drill. Then remove the ferrule from the new interconnecting pin and press the new pin into the hale in

TM 11-6625-2749-14&P

the circuit board. Position the pin in the same manner as the old pin. Then, solder the pin on both sides of the circuit board. If the old pin was bent at an angle to mate with a connector, bend the new pin to match the associated pins.

B. CIRCUIT-BOARD PIN SOCKETS

The pin sockets on the circuit boards are soldered to the rear of the board. To replace one of these sockets, first unsolder the pin (use a vacuum-type resoldering tool to remove excess solder]. Then straighten the tabs on the socket and remove it from the hole in the circuit board. Place the new socket in the circuit board hole and press the tabs down against the board. Solder the tabs of the socket to the circuit board; be careful not to get solder into the socket.

NOTE

The spring tension of the pin sockets ensures a good connection between the circuit board and the pin. This spring tension can be destroyed by using the pin sockets as connecting points for spring-loaded probe tips, alligator clips, etc.

C. END-LEAD PIN CONNECTORS

The pin connectors used to connect the wires to the interconnecting pins are clamped to the ends of the associated leads. To replace damaged end-lead pin connectors, remove

the old pin connector from the end of the lead and clamp

the replacement connector to the lead.

Some of the pin connectors are grouped together and mounted in a plastic holder; the overall result is that these connectors are removed and re-installed as a multi-pin connector when it is replaced. An arrow is stamped on the circuit board and a matching arrow is molded into the plastic housing of the multi-pin connector. Be sure these arrows are aligned as the multi-pin connector is replaced. If the individual end-lead

holder, note the

pin connectors are removed from the plastic

color of the individual wires for replacement.

TROUBLESHOOTING

Introduction

The following

shooting of the

sections of this manual should be used along with the fol-

lowing information to aid in locating the defective component. An understanding of the circuit operation is very helpful in locating troubles. See the Circuit Description

Section for complete information.

information is provided to facilitate trouble-

Type 7A22. Information contained in other

General

2. Inspect the front panels of the Type 7A22 and indicator oscilloscope to be sure that the trouble is not from an incorrect control setting.

3. Insure that the indicator oscilloscope is not at fault by inserting a known-good plug-in unit and checking its

operation.

4. Determine all trouble symptoms.

5. Perform a visual inspection of the Type 7A22.

6. Repair or replace obviously defective parts.

7. Troubleshoot the Type 7A22 as necessary.

8. Recalibrate the Type 7A22.

Indicator Oscilloscope

The quickest check of the oscilloscope is to use it with a good plug-in unit, or check the questionable plug-in with another oscilloscope. Refer to the oscilloscope manual to verify proper operation of the oscilloscope.

Operating Procedures and Control Settings

Refer to the Operating Instructions Section of this manual to verify operating procedures and front panel control settings of the Type 7A22.

Trouble Symptoms

The Type 7A22 response to all front panel controls should be observed. The first-time operation in Section 2 or the Performance Check in Section 5 may be used for this purpose. All trouble symptoms should be evaluated and compared against each other. A casualty will often create a combination of symptoms that, when considered together, will pinpoint the trouble.

Visual Inspection

In physically examining the Type 7A22, take special note

of the area indicated by evaluation of symptoms. Look for

loose or broken connections, improperly seated transistors and burned or otherwise damaged parts. Repair or replace all obviously defective components.

Calibration Check

Troubles can frequently be located and corrected by recalibrating the instrument. Unless the casualty has definitely been isolated to a specific circuit, it is recommended that the calibration procedure contained in Section 5 be performed to provide a logical circuit troubleshooting sequence.

If trouble occurs in the Type 7A22, the following pro-

cedure is recommended to accomplish rapid and effective

repairs.

1. Check that the plug-in nectors are not damaged, properly inserted.

unit and the oscilloscope con-

and that the plug-in unit is

DETAILED TROUBLESHOOTING

General

If the casualty has not been disclosed and corrected

through the procedure outlined, a detailed troubleshooting

4-5

TM 11-6625-2749-14&P

analysis will have ta Section, the Schematic Diagrams, and the troubleshooting aids contained in this section are designed to expedite troubleshooting.

The Circuit Description Section provides

understanding of circuit operation and is referred to the Schematic Diagrams. The Schematic Diagrams contain voltage and resistance values and signal waveforms. The specified operating conditions should ing voltage or waveform comparisons.

Voltages and waveforms

tween instruments.

should be checked against each instrument while

it is operating

noted on the schematics for later reference.

performed. The Circuit Description

duplicated before mak-

NOTE

Those given in the schematics

properly.

may vary slightly be-

Deviations

fundamental

should be

Test Equipment Recommended for Troubleshooting

The test equipment listed here should suffice for most troubleshooting bration is listed in the Calibration Section.

High Impedance Voltmeter (20,000 f2/V DC or greater) Ohmmeter Test Oscilloscope and Probes Flexible Plug-in Extension Cable

Dynamic Transistor Tester

iobs. Test equipment required for cali-

(2 mA or

less current on the X 1 k~ scale)

DC Balance Check

properly operating oscilloscope will have its trace tered vertically on the CRT only when the Type 7A22 has a

balanced output. The Type 7A22 is connected in circuit being electrically identical to the —INPUT circuit. With no signal or comparison voltage applied to the FET gates, any point in the +INPUT circuit should have tential equal to an identical point in the —INPUT circuit.

If the CRT trace is deflected as problem, unbalances will exist between the two circuits. The unbalance

voltmeter between identical points in the two circuits.

An aid to this process is to short together the inputs of the

stage being checked as shown in this example.

If the output balance is checked first and is in error, work toward the front until an unbalance localizes the trouble to the circuitry between the points which

differential configuration, with the +INPUT

can be

detected by connecting

balanced amplifier

result of

high impedance

longer exists. This

cen-

Type 7A22

po-

Fig.

4-2.

Transistor

are balanced and the points which are unbalanced. The individual components must then

iunction-voltage

measurements.

checked.

Troubleshooting by Direct Replacement

Semi-conductor

tronic equipment troubles. The often makes substitution the most practical means of repair. If this method is used, these guide lines should

Determine that the circuit is safe for the substitute com-

ponent.

Use only substitute components that are known to Remove

ing components, to protect both you and the equipment.

placed

the

sure components are inserted properly.

Check operation after Return good components to their original sockets. Check calibration after

(see

failures account for the maiority

ea :e of

plug-in from the oscilloscope before substitut-

each

component is replaced,

Table 4-l).

bad component has been re-

replacing transistors

followed:

elec-

good.

Component Checks

Transistors

The best means of checking

transistor curve display instrument such as the Tektronix

Type 576. If

defective transistor making in-circuit voltage checks, by measuring the transistor resistances or by the substitution method previously described.

When troubleshooting emitter-to-base and emitter-to-collector whether the voltages are consisent with normal circuit voltages. Voltages across its circuit function. Some of these voltages are predictable. The base-emitter voltage of sistor will normally con

transistor will normally

transistor checker is not readily available,

can be

approximately 0.2 V and that of

transistor is by using

located by signal tracing, by

using

voltmeter, measure the

voltages

transistor vary with

conducting germanium tran-

approximately 0.6 V. The

the

determine

device and

col

sili-

4-6

TM 11-6625-2749-14&P

SECTION 5

PERFORMANCE CHECK/

CALIBRATION PROCEDURE

Introduction

Complete information for performing

or Calibration of the Type 7A22 is contained in this section

of the manual. The Equipment Required list is needed both

for

Performance Check

All waveform photographs,

control settings apply whether the instrument is being cali-

brated or checked for pedcmxsnce.

To conduct a Performance Check complete all parts of

each

step in f-he following procedure, except the part subtitled ADJusT. To check the performance of the Type 7A22, it is not necessary to remove the oscilloscope side panel ar mcske csny

front panel of the Type 7A22

ing the performance of the instrument. If the instrument does

not meet he performance requirements given in this pro-

cedure,

done..

tion correspond to the Specifications given in Section convenience in calibrating the Type 7A22, steps containing

internal ad~ustments

Calibration of the Type 7A22 requires completion af 011

; mrts of

of every step in this procedure returns the Type 7A22 to

its oriainal nerformonce standards. To assure accurate measurements and correct opercsticm, the calibration of the Type 7A22 should or every six months if used infrequently. Before performing a

complete calibration, thoroughly clean and inspect this

instrument as outlined in the Maintenance section.

internal cd~ushwsts. Ad~ustnaents located on the

$he

complete procedure including Crdiustments should

All performance requirements given in this

each

step in the following procedure. Completion

checked after

csnd

for calibrating the Type 7A22.

equipment setup pictures, and

can be

csre

marked with the symbol (J.

each

Performance Check

performed when check-

sec-

1000 hours of operation;

TEST EQUIPMENT REQUIRED

General

The following test equipment and accessories (or their

equivalent] are required for

or calibration of the Type 7A22. Specifications given are the minimum necessary for accurate performance of this instrument. All test equipment brcsted

and operating within the given specifications. If equip-

ment is substituted, it must meet or exceed the specifications

of the recommended equipment.

For the q~ickest

formance check, special Tektronix calibration fixtures are

used where mecessory. These special calibration fixtures are

crnd

complete performance check

assumed to be correctly cali-

most accurate calibration or per-

For

available thraugh yaur local Tektronix Field Office or rep-

resentative.

7000 Series Oscilloscope, referred ta as “oscilloscope”

in this procedure. For this procedure 7B50 Time Base is used.

2. Constant Amplitude Sine-Wave Generator. Output fre-

quency range af 10 Hz through 1.0 MHz; output amplitude

range from 2 V to 20 V peak to peak. General Radio Type 131OA is recommended.

3. Standard Amplitude Calibrator. Amplitude accuracy,

within 0.25~’; signal amplitude 0.5 mV to 100 V; output sig-

nal 1 kHz square wave and DC. Tektronix Calibration Fixture 067-0502-01 recommended.

4. Reed Pulse Generator. Tektronix Calibration Fixture

067-0608-00 is recommended.

5. Coaxial Cable. Impedance, 50 ohms; length, 42 inches;

connectors,

012-0057-01.

6. Dual input BNC connector. Provides matched signal

paths to both Type 7A22 input connectors. Tektronix Part

Number 067-0525-00.

7. Variable Attenuator. A variable attenuator which has

the end terminals of

input to ground and the potentiometer divider arm connected

to the attenuator output.

0511-00 is recommended.

8. 1000:1 Divider. Tektronix Part Number 067-0529-00

recommended.

9. Input RC Normalizer. RC time constant, 1 megohm X 47 pF; connectors, BNC. Tektronix Part Number 067-0541-00 is recommended.

10. Attenuator. Impedance, 50 !2; Ratio, 10:1; connectors,

BNC. Two each, Tektronix Part Number 011-0059-02.

11. Plug-in extender.

0589-00.

12. Termination. Impedance, 50

011-0049-01.

13. BNC T Connector. Tektronix Part Number 103-0030-00.

14. Adapter, GR to BNC Female. Tektronix Part Number

017-0063-00.

15. Adapter, GR to BNC Male. Tektranix Part Number

017-0064-00.

BNC. Two required. Tektronix Part Number

100 ohm patentiometer cannected from

Tektronix Calibration Fixture 067-

Type 7504 with

(2.

Tektronix Part Number

REV. B, AUG.

1977

5-1

TM 11-6625-2749-14&P

16. Banana plug-jack to banana plug-lack patch card. Tektranix Part Number 012-0031-00 (black). Three needed.

(red) ar 012-0034-00

SHORT-FORM PERFORMANCE

CHECK/CALIBRATION PROCEDURE

This short-form procedure is provided to aid in checking

the performance orcalibrcstion of the Type 7A22. It may

used as

guide by the experienced operator or calibrator, or

it may

reproduced and used as calibration. Since the step numbers and titles used here correspond to those used in the complete procedure, this procedure also serves as an index to locate plete procedure. Performance requirements listed here cor-

respond to those given in Section

Type 7A22, Serial No.

Calibration

Caiibrated

❑ 1.

❑ 2.

❑ 3.

❑ 4.

❑ 5.

❑ 6.

❑ 7.

❑ 8.

❑ 9.

❑ 10.

Check or Adjust AC Atten Bal (R505) Trace within 1.5 Div of graticule center as VOLTS/

DIV switch is changed from lof?7vt0’zoJL v.”

Check or Adjust Variable Bal (R425) Maximum trace shift &O.2 Div as the VARIABLE

(VOLTS/DIV)

Check or Adjust Coarse DC Bal (R275) Trace within

POINT selector is changed from 10kHz to DC.

Check ar Adjust+ lNPUTZero(Rl Maximum trace shift *2 Div as the + INPUT AC-

GND-DC switch is switched from GND to AC.

Check or Adjust– lNPUTZero(R215)

Maximum trace shift &2 Div as the – INPUT ACGND-DC switch is switched from GND to AC.

Check or Adiust GAIN (R540)

Correct vertical deflection in the 1 mV position of the VOLTS/DIV switch (front panel adjustment).

Check VARIABLE (VOLTS/DIV) control

Ratio

Display amplitude decreases by when the VARIABLE control rotated fully counterclockwise.

Check VOLTS/DIV Gain Switching

Correct vertical deflection from 10 pV through 10 mV.

Check Isolation Between + and – INPUTS Page 5-7 Trace deflection of 0.5 Div or less.

Check Total DC OFFSET Range Check for minimum offset range of + and –1 volt.

By-

Date

0.1

-----

rotated stop-to-stop.

Div of graticule centeras LF –3dB

permanent record of

step in the com-

—

–

(in

---------

__________

15) Page 5-5

ratio of 2.5:1

the out position) is

Page 5-4

Page 5-5

Page 5-7

~ 12.

❑ 13.

❑ 14.

❑ 15,

❑ 16.

❑ 17.

❑ 18.

❑ 19.

❑ 20.

❑ 21.

❑ 22.

❑ 23.

❑ 24.

❑ 25.

INPUT AC-GND-DC from GND to DC; aberration should not exceed &l

Check or Adjust C141 - Cross Neutralization Page 5-8

With sianal connected to — INPUT. switch

INPUT AC-G ND-DC from GND should not exceed +1

Check or Adiust C115 Xl + INPUT

Attenuator

Time Constant

Optimum square wave response

Check or Adjust C215 Xl – INPUT

Attenuator Time Constant Optimum square wave response.

Check Input Attenuator Accuracy

Correct vertical deflection from 10 mV through 10 V.

Check or Adjust Attenuator Differential

Balance (R108E, R109E, R110E) Optimum differential balance.

Check or Adjust + Input Attenuator

Compensation

(C108C, C109C, C11OC, C108A, C109A, Cl 10A) Optimum square wave response.

Check or Adjust – Input Attenuator Series Page 5-10 Compensation to C21OC) spike amplitude),

Check or Adjust – Input Attenuator Shunt Page 5-11

Compensation (C208A, C209A, Optimum flat bottom display.

Check or Adjust HF –3 dB POINT (C425) Page 5-12

HIGH FREQ —3 dB POINT bandwidth limit.

Check LF –3 dB POINT

LOW FREQ —3 dB POINT bandwidth limit.

Check or Adjust CMRR (C330)

CMRR must

requirements at the verification points shown

tion 1, Fig. 1-2 of the manual.

Check OVERDRIVE Indicator

Indicator turns

Check Differential Signal Range

No change in sine-wave amplitude when + or – 1 volt DC is applied.

Check Overall Noise Level Tangentially

Less than 16 /tV of displayed noise, measured tan-

gentially.

Best common-mode siqnal reiection (minimum

~o.

the

DC; aberration

~c.

Page 5-8

Page 5-9

Page 5-10

match +

equal to or better than the specified

on at

approximately 1 volt.

Input (C208C, C209C,

C21 OA)

Page 5-12

Page 5-13

Range 5-14

Page 5-15

Sec-

❑ 26.

❑

Check or Adjust C241 With signal connected to + INPUT, switch the —

5-2

Cross Neutralization Page 5-7

Check Overdrive Recovery

10 ~M or less to recover to within

0,50/0 of

Page 5-15

zero level.

TM 11-6625-2749-14&P

lector-emitter voltage will vary with the circuit and circuit

conditions but it should alwcsys exceed 0.5V. The best way of checking these devices

the junction, using a sensitive voltmeter setting (see Fig. 4-2).

An ohmmeter can beusedto check a transistor if the ohm-

meter’s voltage source and current are kept within safe limits.

1.5V and 2mA are generally acceptable. Selecting the Xl Ksca[eon below these values.

Table 4-2

pect when making an ohmmeter check of an otherwise unconnected transistor.

Fig. 4-3

this instrument.

most ohmmeters will provide voltage and current

shows the transistor base and socket arrangements

is by

connecting a voltmeter across

contains the normal values of resistance to ex-

Ohmmeter’

Connections

Emitter-Collector

Emitter-Base

Base-Cal lector

‘Test prods leads

and then effests of the meter

to the

TABLE 4-2

Transistor Resistance Checks

Resistance Reading That Can be

Expected Using theRX 1 kRange

Hiah readinas both ways High reading one way, low read-

ing the other way High reading one way, law read-

ing the other way

fram the ohmmeter are first

the test

polarity reversal of the voltage applied from the ohm-

transistor

lead

can be

connections

obsewed.

connected to

are

reversed. Thus,

the tmnsistor

the

Fig. 4-3.

Tmnsistor base pin and socket arrangement.

4-7

TM 11-6625-2749-14&P

Fig. 4-4. Diode polarity and color code.

Diodes

A diode can rechecked for an open or for a short circuit by measuring the resistance between terminals with an ohmmeter set to the R X 1 k scale. The diode resistance should be very high in one direction and very low when the meter leads are reversed. Do not check tunnel diodes or back diodes with an ohmmeter.

Some diodes used in the Type 7A22 are color coded to

identify the diode type. The” cathode end of each glass-

encased diode is indicated by a stripe, a series of stripes

or o dot. For most diodes with a series of stripes, the first stripe (either pink or blue) indicates a Tektronix part and the next three stripes indicate the three significant figures of the Tektronix Part Number. Example: a diode color coded blue-brown-gray-green indicates a diode with Tektronix Part No. 152-0185-00. The cathode and anode of a metal-encased . diode can be identified by the diode symbol marked on the body. See Fig. 4-4, DIODE POLARITY AND COLOR CODES.

Resistors

The types and accuracies of resistors found in this instru-

ment vary in accordance with the circuit needs, Replacement

resistors should be of the same type and must be at least

as accurate as those originally contained in the circuit, to

maintain the high common-mode rejection ratio. The size, location and lead length are often critical because of frequency considerations.

4-8

Fig. 4-5. Color code for resistors and ceramic capacitors.

REV. B, FEB. 1975

TM 11-6625-2749-14&P

Composition, wire-wound and

this unit. The stable metal film resistors may be identified by their light blue or gray body color. If a metal film resistor hcss cs value indicated by three significant figures and a multiplier, ard resistor color code. If it has a value of more than three significant figures and a multiplier, the value will be printed

will be color coded according to the EIA stand-

rnetcsl

film resistors are used

Capacitors

A Ieakyors.horted resistance with an ohmmeter using the highest scale that does not exceed the voltage rating of the capocitor. The resistance reading should be high after the initial charge of the capacitor. An open capacitor can be detected with a capacitance meter or by checking whetlmr the capacitor passes AC Sigmsk.

The capacitance values of common disc capacitors and small eiectroiytics are marked the component body. The white ceramic capacitors used the Type 7A22 are color coded fied HA code (see Fig. 4-5].

capacitor can be detected by checking

microfarads on the side of

picofarads using a modi-

Repackaging for Shipment

If the Tektronix instrument

Service Center for service or repair, attach owner (with address) and the name of an individual at your firm that can be contacted, complete instrument serial number and

Save and re-use the package in which your instrument was shipped. If the original packaging available, repackage the instrument

Surround the instrument with polyethylene

protect the finish of the instrument. Obtain corrugated cardboard of the correct carton strength and having inside dimensions of no than the instrument dimensions. Cushion the instrument

by tightly packing three inches of dunnage or urethane foam between carton and instrument, on all sides. Seal carton with shipping tape or industrial stapler.

The carton test strength far your instrument

description of the service required.

is to be

less

shipped to

unfit for use or not

fallows:

than six inches more

tag showing:

sheeting to

200 pounds.

Tektronix

carton of

REV.

AUG. 1977

4-9

TM 11-6625-2749-14&P

4-10

Fig. 4-6. Main circuit board (components)

TM 11-6625-2749-14&P

Fig. 4-7. Main circuit board [wire color code),

4-11

TM 11-6625-2749-14&P

4-12

Fig. 4-8. Bandwidth circuit board (components and wire color code)

TM 11-6625-2749-14&P

PERFORMANCE CHECK/CALIBRATION

PROCEDURE

General

The following procedure is arranged in

allows the Type 7A22 to

action of steps in which symbol following the title. instrument performance is checked in he “CHECK’” part of the step before an adjustment is made. The “ADJUST’” part of the step identifies the point at which the

“INTERACTION” csd~ustment only

csd~ush-nents

ad~w.tmerats

crctual

just performed. This is particularly helpful when

partial calibration procedure is performed.

ccslibrated with the least inter-

and reconnection of equipment. The

are made are identified by the

ad~ustment is made. Steps listed in the

part of the step may be affected by the

NOTE

To prevent recalibration

strument when performing readjust only if the tolerances “CHECK” part of the step are not met. However, when performing overall performance ment is made to the exact setting even if the

“CHECK” is within the allowable tolerance.

In the following procedure, is shown for each maior group of checks and adjustments. Each step continues from the equipment setup preceding the desired portion. External controls or adjustments of the Type 7A22 referred to in this procedure are capitalized (e.g., POSITION]. ized only [e.g., Variable Bal).

All waveforms shown in this procedure are actual waveform photographs taken with

era System. The following procedure uses the equipment listed

stituted, control settings or test equipment setup may need

used. Detailed operating instructions for the test equipment are not given in this procedure. If an doubt as to the correct operation of any of the test equipment, refer to the instruction manual for that unit.

Internal ad~ustrment names are initial capital-

under Test Equipment Required. If equipment is sub-

altered to meet the requirements of the equipment

other parts of the in-

complete calibration,

obtcsined if each adjust-

test-equipment setup picture

Tektronix Oscilloscope Cam-

sequence which

partial calibration,

given

in the

best

NOTE

It is assumed that performance

a temperature range of O“C to +50” C and cali-

bration + 25°C, this procedure are for this temperature

However, if the procedure is performed at some

other temperature, check the applicable tolerances for that temperature range.

Preliminary Procedure

1. If the Type 7A22 is to

in extender into the oscilloscope and plug the Type 7A22

into the plug-in extender. If this procedure is Check only, insert the Type 7A22 into the oscilloscope plugin compartment.

2. Connect the oscilloscope power cord to the design

center operating voltage for which the oscilloscope is wired.

3. Turn on the oscilloscope POWER switch. Allow at

least 20 minutes warmup for checking the instrument to the given accuracy.

4. Preset the Type 7A22 front panel controls as follows:

VOLTS/DIV VARIABLE POSITION HIGH FREQ –3 dB POINT 100 Hz LOW FREQ –3 dB POINT AC-GND-DC (+ INPUT) AC-GND-DC (–INPUT) STEP ATTEN DC BAL

DC OFFSET COARSE DC OFFSET FINE

5. Preset the Time Base front panel controls to these set-

tings:

Time/Div Variable Triggering

6. Set the oscilloscope Focus

ing.

*5° C; the tolerances given in

checked within

range.

calibrated, insert the plug-

Performance

10mV CAL IN Midrange

10 kHz

GND

GND Midrange 5 turns from either extreme Midrange

.5 ms

In (Calibrated) Auto, AC, Int

and Intensity for

best view-

5-3

TM 11-6625-2749-14&P

Fig. 5-1. Left side of the

NOTE

Calibration with the side covers’;n place. All inter;al adjustments can be made using the access holes provided in the side covers.

the Tme 7A22 must be ~erformed

1. Check or Adjust AC Step Atten Bal

a. Center the trace

trol.

Rotate the VOLTS/DIV

\lv pOSifiOrI.

c. CHECK—The

graticule center.

ADJUST—AC

5-1) to position the trace within 1.5 div of graticule center.

the CRT with the POSITION con-

switch from 10mV to the 20

trace should remain within 1.5 div of

Step Atten Bal control, R505,

(see

Fig.

2. Check or Adjust VariabIe Bal

Set the Type 7A22 VOLTS/DIV switch to 10mV.

Position the trace to graticule center with the POSl-

TION control.

c. Rotate the VARIABLE VOLTS/DIV

from stop to stop.

CHECK—For maximum trace shift not to exceed *0.2 div while rotating the VARIABLE control throughout its range.

(in

the out position)

7A22

showing adjustment locations,

ADJUST—Variable

trace shift while rotating

Bal control, R425,

the

VARIABLE control.

(see

Fig. 5-1

Fig. 5-1) for

5-4

TM 11-6625-2749-14&P

AC-GND-DC (–INPUT]

Time/Div Variable (Time/Div] Triggering

GND

.5 ms Cal Auto, AC, Int

4. Check or Adiust + Gate Current Zero

Using the POSITION

graticule center.

c. Set the +-INPUT AC-GND-DC switch to AC.

d. CFfECIC----For maximum trace shift within i 2 div.

ADJLJST-The

Fig. 5-1

], to

Cl-f ECK-(only the +-INPUT AC-GND-DC switch to GND and back to AC. There should be no movement of the trace.

g. Set the + INPUT AC-GND-DC switch to GND.

position the trace to graticule center.

control, position the trace to

+-Gate Current Zero control,

ad~ustment has been made). Switch

15, (see

AC-GND-DC

AC-GND-DC (–INPUT)

STEP ATTEN DC BAL

6. Check or Adjust GAIN

a. Test equipment setup is shown in Fig. 5-2.

Connect

from

standard amplitude calibrator through

divider and

Set the 1000:1 divider to X 1.

d. Align the display with the graticule lines using the

POSITION control.

CHECK—The

actly 5 div.

f. ADJUST—The

R540) for exactly 5 div of display amplitude.

7. Check VARIABLE Control Ratio

a. With the VARIABLE in the OUT position, rotate the

control fully counterclockwise.

CHECK—The display amplitude shouid be 2 div or less

to meet the 2.5:1 ratio requirement.

INPUT) DC

GND Ad@st for proper DC bal-

ance.

a 5 mV

coaxial cable to the +INPUT connector.

peak-to-peak square wave signal

display for

GAIN control (front panel adjustment

vertical amplitude of ex-

1000:1

5. Check or Adjust

0. Remove the 50 Q termination from the + INPUT and

connect it to the —INPUT connector.

b. Posi~ion the trace to graticule center with the POSl-

TION control.

Set the —INPUT AC-GND-DC switch to AC.

d. CHECK—For

ADJLJST-The

Fig. 5-1

], to

return the trace to graticule center.

f. CHECK+only the —INPUT AC-GND-DC AC. There should

g. Disconnect the 50 Q termination.

Set the –INPUT AC-GND-DC switch to GND.

Type 7A22 controls

VOLTS/DP4

VARIABLE POSITION HIGH FREQ –3 dB

POINT

LOW FREQ –3 dB

POINT

be no

- Gate Current Zero

maximum trace shift within & 2 div.

—Gate Current Zero control, R215,

adjustment has been made). Return

switch ta GND and back to

trace shift.

1 mV CAL IN Midrange 1 MHz

(see

8. Check VOLTS/DIV Gain Switching

a. Set the HIGH FREQ —3 dB POINT switch to 3 kHz.

Set the LOW FREQ –3 dB POINT switch to 1 Hz.

Set the standard amplitude calibrator output ta 10 mV.

d. Using the VARIABLE VOLTS/DIV

display amplitude to exactly 5 div.

Set the Time Base Triggering Source to Line.

f. Position the Time/ Div switch to .1 w

Switch the 1000:1 divider to X 1000.

.h.

CHECK—The

through 50 pV. Table 5-1 is provided as

VOLTS/DIV

switch

position

10 pv20 pv 50 lLV

vertical deflection factor from 10 pV

TABLE 5-1

Standard

Amplitude

Calibrator

output

Amplitude

.1 v

.2 v

.5 v

Divisions

Deflection

5 5 5

control, adiust the

guide.

Accuracy

* * 270 & 270

27!0

REV. B, AUG. 1974

5-5

TM 11-6625-2749-14&P

Fig. 5-2. Equipment required for steps 6 through 19..

i. Return the VARIABLE to the CAL IN position. i. Switch the 1000:1 divider to the Xl position. k. CHECK—The vertical deflection factor from .1 mV

through 10 mV using Table 5-2 os a guide.

TABLE 5-2

Standard

Amplitude

VOLTS/DIV Calibrator

switch Output of

position

.1 mV .5 mV 5 .2 mV 1 mV .5 mV 2 mV 4 ± 2 % 1 mV 2 mV

5 mV 20 mV

10mV

1. Remove the 1000:1 divider from the Standard Ampli-

tude Calibrator.

Amplitude Deflection Accuracy

5 mV

10mV

50 mV

Divisions

5 ± 2%

5 4 5

± 2% ± 2%

± 2 % ± 2 %

± 2 %

Type 7A22 Controls

VOLTS/DIV VARIABLE POSITION HIGH FREQ –3 dB

POINT

LOW FREQ –3 dB

POINT

AC-GND-DC (+ INPUT) AC-GND-DC (–INPUT) STEP ATTEN DC BAL

Time Base Controls

Time/Div Variable Slope Coupling Source Mode

1 mV CAL IN Midrange

1 MHz

DC OFFSET

DC GND Adjusted for DC balance

Calibrated +

Int

Auto

5-6

9. Check Isolation Between + and —Inputs

a Set the Standard Amplitude Calibrator to .1 V square

wave.

b, Ad@ the DC OFFSET COARSE and FINE controls to position the top of the square wave to the graticule center line.

Switch the —AC-GND-DC

d. CHECK—Trace

Repeat the above procedure for the —INPUT, checking for trace deflection when switching the +AC-GND-DC switch to DC.

deflection must be 0.5 division or less.

switch to DC.

10. Check Total DC OFFSET Range

a. Set the Type 7A22 controls as follows:

voLTs/Dlv

AC-GND-DC

b. Set the Standard Amditude Calibrator to 1 V and Mode

selector to +-DC.

c. Connect

Calibrator output to the Type

d. Turn the COARSE and

counterclockwise.

e. Ct-f

ter. (1 V minimum DC offset).

i. Set the -I-INPUT AC-GND-DC switch to GND.

~. Rotate the FINE

wise ta return the trace to cjraticule center (approximately

5 turns af the COARSE OFFSET control).

{+-INPUT)

[–INPUT)

coaxial cable

ECK-The trace

crnd

can be

TOmV DC

GND

from the Standard Amplitude

7A22 + INPUT connector.

FINE OFFSET controls fully

returned to graticule cen-

COARSE OFFSET controls clock-

NOTE

The X 10, X 100, and X 1000 input attenuators will be checked in step 15. Consequently,

remainder of the DC OFFSET ranges stated in Sec-

tion 1 will be verified by that step.

Type 7A22 Controls

VOLTSIDIV VARIABLE

POSITION

HIGH FREQ –3 dB

POINT

LOW FREQ –3 dB

POINT

Time Base Controls

10mV CAL [N Midrange

1 MHz

GND Acl@sted for proper balance

.5 ms

Norm, -+-Slope, AC, Int

the

TM ll-6625-2749-14&P

Fig.

5-3.

properly odiusted, (B)

Typical waveform

11. Check or Adjust C241 + Cross Neutralization

a. Set the Standard Amplitude Calibrator for

square-wave output.

The Type 7A22 POSITION

Base horizontal positioning control may not always

be mentioned. Use these controls as necessary to

position the display for easy viewing.

CHECK—The

and note any aberration that occurs while switching the

—INPUT AC-GND-DC switch from GND to DC. The wave-

form should appear similar to the one in Fig. 5-3. The aber-

ration should not exceed ~ 1 ~..

Set the —INPUT AC-GND-DC switch to DC.

d. ADJUST—C241

leading corner.

upper leading corner of the waveform,

showhrg

incorrectly

IA) Cross

adiusted.

NOTE

control and the Time

(see

Fig. 5-1) for best square upper

neutralization

a 50

5-7

TM 11-6625-2749-14&P

INTERACTION—C241 and all ather input attenuator adjustments. If C241 is adiusted out of sequence, steps 13, 14 and 16 through 18 must also

performed.

affects the Xl input capacitance

12. Check or Adiust Cl 41 + Cross Neutralization

a. Disconnect the signal from the +INPUT connector and

connect it to the —INPUT connector.

Set the +INPUT AC-GND-DC switch to GND.

c. CHECK—The lower leading corner of the second cycle

of the display and note any aberration that occurs while switching the +INPUT AC-GND-DC switch from GND to DC. The bottom leading corner of the waveform should appear

similar to the one shown in Fig. 5-3. The aberration should

not exceed & 1 %.

Set the +INPUT AC-GND-DC switch to DC.

ADJUST—Cl

INTERACTION—C141

and all other input attenuator adjustments. If C141 is ad-

iusted out of sequence, steps 13, 14 and 16 through 18 must

performed.

Disconnect the coaxial cable from the –INPUT.

41 (see

Fig. 5-1 ) for best square corner.

affects the X 1 input capacitance

13. Check or Adiust Cl 15—x 1 +INPUT O Attenuator Time Constant

NOTE

It is important that C141 and C241 be properly adiusted before performing

you have not performed steps 11 and 12, do so

at this point.

Connect

Calibrator to the

c. Set the —INPUT AC-G ND-DC switch to GND.

Set the Standard Amplitude Calibrator output to

square wave.

CHECK—The

Fig. 5-4).

wave response.

steps 14 and 16 through 19 must also

a 47 pF

Connect

Set the +INPUT AC-GND-DC switch to DC.

ADJUST—Cl

iNTERACTION—lf

input

coaxial cable from the Standard Amplitude

Normalizer.

square wave display for flat tops

15 (see

Cl 15 is

14. Check or Adiust C21 5—)(x1

this adjustment.

Normalizer to the +INPUT.

Fig. 5-1) to obtain best square-

adiusted

out of sequence,

performed.

0.1

(see

–INPUT O

Attenuator Time Constant

Disconnect the

connect it to the —INPUT.

Set the +INPUT AC-GND-DC switch to GND.

Normalizer from

the +INPUT and

(c)

(A)

Fig. 5-4. Typical waveform

Input

Attenuator Time Constant.

c. Set the —INPUT AC-G ND-DC switch to DC.

CHECK—Each

Fig. 5-4 as

square-wave display,

ADJUST—C215

guide.

showing

(B) and [C) incorrect adjustment.

square wave for

(see

Fig. 5-1) for best flat bottom

as in Fig, 5-4A.

Correct adjustment

flat bottom, using

5-8

lNTERACTlON—[f

steps 13

crnd 16

g. Disconnect the signal and the RC Normalizer.

C215 is ad~usted out of sequence,

through 19 must

cslso be

performed.

15. Check Input Attenuator Accuracy

cr. Connect from the Standard Amplitude Calibrator through cable to the +-INPUT.

b. Se+

c. CHECK—The

guide.

50mV peak-to-peak square wave signal

the +-INPUT AC-GND-DC switch to DC.

input attenuators using Table 5-3 as

TM 11-6625-2749-14&P

coaxial

Disconnect the signal from the Type 7A22.

NOTE

[Applies to calibration only)

If there is

corner of the square wave when checking from

20 mV to 10 V, ignore these, as they will be corrected in step 17.

spike or fast rolloff of the leading

16. Check or Adjust Input Attenuator Differential Balance

a. Connect Standard Amplitude Calibrator and the +-INPUT and —INPUT connectors of the Type 7A22.

Connect cr coaxial cable from the T connector to the

dual input connector. Connect

connector to the Ext In connector on the oscilloscope.

c. Set the Type 7A22 controls as follows:

VOLTS/DIV

AC-C%

AC-GND-DC (–INPUT)

d. Set the oscilloscope Triggering Source switch to Ext.

Set the Standard Amplitude Calibrator output to 50 V.

C6-fECK-For

to the information given in Table 5-4. When properly ad-

a T

connector to the Output connector of the

JD-DC (+-INPUT)

optimum differential balance according

dual connector to

coaxial cable from the T

50 rnv DC DC

Fig. 5-5. Typical display adiusted

iusted, the waveform should appear as shown in Fig. 5-5. Disregard any spikes on the waveform.

minimum amplitude as shown in Fig. 5-5, using Table 5-4 as

to-peak output.

7A22.

far

optimum

g. ADJUST—R108E,

guide.

Set the Standard Amplitude Calibrator

i. Disconnect the dual input connector

Set the Type 7A22 Controls:

VOLTS/DIV VARIABLE HIGH FREQ –3 dB

POINT

LOW FREQ –3 dB

POINT AC-GND-DC (+-INPUT) AC-GND-DC (–INPUT) STEP ATTEN DC BAL

abtained when

differential

balance.

R109E and

TABLE 5-4

Input Attenuators

10E

(see

Fig. 5-1) for

for 0.2 V peak-

fram the Type

50 mV CAL IN 1 MHz

DC GND Adiusted for proper DC Bal-

ance

are

5-9

TM 11-6625-2749-14&P

Set the Time Base Controls.

Time/Div Variable In (Cal) Triggering

.5 ms

Auto, Ac, Int

17. Check or Adjust + Input Attenuator O Compensation

a. Connect a 0.2 V peak-to-peak signal from the Standard Amplitude Calibrator through a coaxial cable to the +lNPUT of the Type 7A22.

b. CHECK—The +INPUT Attenuator compensation for good square wave response.

c. ADJUST—The +INPUT Attenuator compensation for best square wave response using Table 5-5 as a guide. Fig. 5-1 shows the locations of the adjustments.

TABLE 5-5

Connect the 47 pF input RC normalizer between the + lN-

PUT and the coaxial cable.

c. INTERACTION--lf this step is performed out of se-

quence, steps 18 and 19 must be performed.

d. Disconnect the RC normalize

Type 7A22 and the Standard Amplitude Calibrator.

and coaxial cable from the

18. Check or Adjust - Input Attenuator O

Series Compensation

O. Connect a T connector to the Standard Amplitude Cali-

brator output connector and a dual input connector to the

5-10

Fig. 5-6. Typical display obtained with - Input attenuator ad. ijusted for optimum Common-Mode signal rejection. adjusted properly (B) C209C adjusted properly.

Type 7A22 +INPUT and —INPUT connectors. Connect a

coaxial cable from the T connector to the dual input con-

nector. Connect a coaxial cable from the T connector to the oscilloscope Ext In connector.

b. Set the oscilloscope Triggering Source switch to Ext.

c. Set the Standard Amplitude Calibrator output to 50 V

square wave.

d. Set the Type 7A22 controls os follows: VOLTS/DIV

AC-GND-DC (–INPUT) e. CHECK—The displayed waveform

mon-mode signal rejection (minimum spike amplitude).

f. ADJUST—The – Input attenuator series compensation

for best common-mode signal rejection (minimum spike ampli-

tude) using the information given in Table 5-6. Fig. 5-6 illus-

trates the typical displays obtained and Fig. 5-1 shows the

adjustment locations.

50 mV DC

(Al C208C

for good com-

TM 11-6625-2749-14&P

Fig. 5-7. Equipment required for steps 20 through 24.

TABLE 5-6

g. Disconnect all signal leads.

h. Return the oscilloscope Triggering Source switch to Int.

19. Check or Adjust -lnput Attenuator O Shunt Compensation

a. Connect a 47 pF RC Normalizer to the —INPUT of the Type 7A22. Connect a coaxial cable from the Standard Amplitude Calibrator output connector to the RC Normalizer.

b. Set the Standard Amplitude Calibrator output to .5 V square wave.

c. Set the Type 7A22 controls as follows:

VOLTS/DIV

AC-GND-DC (+- INPUT)

d. CHECK—Using Table 5-7 as a guide, check the display for a square wave response similar to the display illustrated in Fig. 5-4.

e. ADJUST—C208A, C209A, and C21OA (see Fig. 5-1) for best flat bottom on the display, according to the information given in Table 5-7.

50 mV

GND

TABLE 5-7

5-11

TM 11-6625-2749-14&P

Disconnect the

Type 7A22 controls:

POSITION VOLTS/DIV VARIABLE AC-GND-DC (+ INPUT) AC-GND-DC (–INPUT)

LOW FREQ –3 dB POINT HIGH FREQ –3dB POINT STEP ATTEN DC BAL

normalizer and all coaxial cables.

Midrange

CAL IN GND GND

1 MHz Adiusted for DC balance

20. Check or Adiust HIGH FREQ –3dB POINT

a. Test equipment setup is shown in Fig. 5-7.

Set theType 7A22 + INPUT AC-GND-DC switch to DC and use the oscilloscope controls as necessary for easy viewing of display.

c. Connect

Sine-Wove Generator to the Type 7A22 +INPUT.

to 1 kHz and adiust for

MHz.

should

4.2 div display requirement must

–

10~o (.9

g. for 4.2 div of display amplitude. See Fig. 5-8 for location of adjustment.

h. —3 dB POINT selector in the

Table 5-9 as

coaxial cable from the constant Amplituae

Set the output frequency of the Sine Wave Generator

a 6

div display on the oscilloscope.

Set the Sine Wave Generator output frequency to 1

CHECK—The

ADJUST—With

CHECK—The

amplitude of the oscilloscope display

4.2 div (this is the —3 dB point at 1 MHz). The

MHz to

1.1

MHz).

the frequency set to 1 MHz, adlust C425

remaining positions of the HIGH FREQ

guide.

scrme

TABLE 5-9

met at 1 MHz + or

manner as in step h using

Fig.

5-8.

Right side of Type

Sei the HIGH FREQ —3 dB POINT selector

7A22

showing location of adjustments.

to 1

MHz.

21. Check LOW FREQ —3 dB POINT

CHECK—Using

FREQ –3 dB POINT in the same manner that wos used to

check

the HIGH FREQ —3 dB POINT.

Sine Wave

Generator

output

Freq

10Hz

100Hz

1 kHz

10 kHz

Table 5-10 as a guide,

TABLE 5-10

LOW FREQ Oscilloscope

—3 dB POINT

Selector

Position

10Hz

100Hz

1 kHz

10 kHz

Display

Amplitude

4,2 div

4.2 div

check

Bandwidth

Tolerance

& 1270 of

Input Freq

&l.2Hz

~12Hz

&120Hz

&l.2 kHz

the LOW

5-12

NOTE

The components that are used in the 0.1 Hz and

1 Hz positions of the LOW FREQ –3 dB POINT selector are also used in the other positions of the selector; therefore, and 1 Hz positions are checked.

the tolerance of the 0.1 Hz

Type 7A22 controls:

VOLTS/13RJ VARIABLE

HIGH FRECI –3 c9Et

POINT

LOW FREQ –3

POINT Ac-GND-DC (+ INPUT) AC-GND-DC (–INPUT]

STEP ATTEN DC

t3AL

Time-Base controls:

Time/Div

Variable Triggering

5V CAL IN 1 MHz

DC GPID

Adjusted for proper DC

balance

As necessary for easy viewing of display In (Cal) Auto, AC, Ext

22. Check or Adjust Attenuator Common Mode Rejection

Attach

a 13NC T

connector. Connect

Amplitude Sine-Wave

rmn~ector. Connect another coaxial cable from the BNC T connector to the dual input connector.

b. Connect the Dual-Input connector to the Type 7A22 +

and – INPUTS.

Set the 7650 SOURCE to EXT X1O, and DISPLAY

MODE to AMPLIFIER

Wave Generator Level control for 20 V P-P at 100 kHz. Use

the VARIABLE on the 7B50to adjust fora suitable display of 4 to 6 horizontal divisions.

The Sine-Wave Generator output must be maintained

constant 20 V p-p for all of the CMRR checks.

d. Switch the Type 7A22 AC-GND-DC (i-INPUT) to GND.

e. Switch the Type 7A22 VOLTS/DIV

f. Simultaneously

GND-DC switches to DC.

g. Cl-f ECK-The vertical deflection should not exceed 2 div. The 2 divrequirementat of 100,000:1 (2 div at 1 mV/DIV = .2 mV; 20 V + .2 mV =

1 00,000].

b. Adjust C330 (and C144 SN B080000 minimum vertical deflection. See Fig. 5-8 for C330 location. C144 is under the ~lasticcover near Q153 on the left side of the 7A22 (see

Fig. 4-6,

connector to the 7B50 EXT in

coaxial cable from the Constant Generator output to the

Adjust the Constant Amplitude Sine-

13NC

NOTE

to .1

mV.

switch the Type 7A22 + and – AC-

O.1 mV/DIVisequivalent

page

4-10).

toa CMRR

and up) for

TM 11-6625-2749-14&P

NOTE

These adjustments interact, and of C330 will be necessary after the cover is replaced over C144.

1, Set the Sine Wave Generator frequency to 100 kHz.

2. Set the Type 7A22 VOLTS/DIV

3. Adjust–Cl

4. ADJUST–RI

i. CHECK–Using

at the remaining attenuator positions.

j. Disconnect all test leads and connectors.

Type 7A22 Controls:

VOLTS/DIV 10mV VARIABLE POSITION HIGH FREQ –3 dB

POINT

LOW FREQ –3 dB

POINT

AC-GND-DC (+ INPUT)

AC-GND-DC (–INPUT) STEP

BAL

Time Base Controls:

Time/Div Triggering

08C for minimum vertical deflection.

for minimum vertical deflection.

Table 5-11 as

ATTEN

‘DC

slight readjustment

to 20

mV.

guide, check the CMRR

CAL IN Midrange 1 MHz

GND GND

Adjusted for DC balance

1 ms +, Auto, AC, Int

23. Check Input OVERDRIVE Indicator

a. Connect

Generator output and the Type 7A22 +INPUT.

Set the Sine-Wave Generator amplitude to minimum

and frequency to 1 kHz.

Increase the Sine-Wave Generator amplitude until the

Type 7A22 input OVERDRIVE

d. CHECK–The divide by 2 to find the + or – driving signal amplitude. The overdrive signal should be approximately

Disconnect coaxial cable from +Input.

Type 7A22 Controls:

VOLTS/DIV

VARIABLE

POSITION

HF –3 dB POINT LF –3 dB POINT

AC-GND-DC (+ INPUT)

coaxial cable between the Sine-Wave

indicator lights.

sine-wave amplitude, peak to peak, and

volt.

1 mV CAL IN Midrange 1 MHz

10Hz GND

REV. JAN 1974

5-13

TM 11-6625-2749-14&P

AC-GND-DC (–INPUT) STEP ATTEN DC BAL

Time Base Controls:

Time/Div Variable Slope Coupling

Source Mode

GND

Adjusted for DC balance

1 ms Calibrated

Int

Auto

b. Set the Standard Amplitude Calibrator amplitude to 1V,

+DC.

c. Connect a coaxial cable between the Sine-Wave Gen-

erator output and the Type 7A22 -INPUT.

d. Switch the -AC-GND-DC switch to DC.

e. Adjust the Sine-Wave Generator amplitude control to give 5 div of 1 kHz display on the CRT graticule (if the SineWave Generator minimum amplitude is too large, insert an attenuator between the coaxial cable and the —INPUT).

f. Switch the + AC-GND-DC switch to DC.

24. Check Differential Signal Range g. CHECK—Sine wave amplitude should not change when

a. Connect a coaxial cable between the Standard Ampli-

tude Calibrator output connector and the Type 7A22 + INPUT.

DC level from Standard Amplitude Calibrator is applied.

h. Switch the + AC-GND-DC switch to GND.

5-14

Fig. 5-9. Equipment required for step 25.

i. Switch the Standard Amplitude Calibrator mode to

– IX.

~. Switch the + AC-GND-DC switch to DC.

TM 11-6625-2749-14&P

k. CFfECK-Sinewcsve

DC level from Standard Amplitude Calibrator is applied.

Disconnect alltest equipment and test leads.

amplitude should not change when

25. Check Overall Noise Level Tangentially

Equipment setup is shown in Fig. 5-9.

Cannecl

of the Type 7A22. Connect two 10X attenuators to the

Connect

C’cdibrator tenuator to the GR connector. Connect to the Variable Attenuator. Connect

10X attenuators to the Variable Attenuator.

Set the Oscilloscope Calibrator to 4 mV and 1 kHz.

Set the 7A22 VOLTS/ DIV switch to 10 pV.

Turn the Variable Attenuator fully clockwise.

g. Set the Time

Div to 10 ps.

Turn the Variable Attenuator counterclockwise until the darker [see Fig. 5-10].

termination.

-#=-VOkS

bcsnd

50Q termination to the -I-INPUT connector

a GR to

Bcsse

between the two noise bands iust disappears

BNC adapter to the Oscilloscope

connector and connect the Varibale At-

Triggering Mode to Auto and Time/

a GR to

coaxial cable from the

BNC adapter

i. Set the Type 7A22 VOLTS/DIV switch to 1 rnV and the

Time Base Time/Div switch to 1 rrw.

~. Remove the two 10X attenuators and connect the co-

axiai cable to the 50

k. Measure the square wave amplitude. Calculate the

tangentially measured display noise as follows:

The tangentially measured noise should not exceed 16 pV.

Type 7A22 controls:

VOLTS/DIV

VARIABLE (VOLTS/DlV9

POSITION

I-IF –3 dB POINT

LF –3 dB POINT

AC-GND-DC

AC-GND-DC –INPUT

STEP ATTEN DC BAL

termination.

sauare wave amriitude

100

.2 v

CAL IN

1 division below graticule

center

1 MHz

+-INPUT

GND

Adlusted for

Balance

Fig. 5-10. Typical display showing [A) two noise bands and (B) merging noise bands,

Time Base controls:

Time/Div Variable Level/Slope Coupling Source

Mode

2 ps

Cal In —

DC Int Auto

26. Check Overdrive Recovery Time

a. Test equipment setup is shown in Fig. 5-11.

Connect the Reed Pulse Generator Output to the Type

7A22 + INPUT.

c. Connect the Reed Pulse Generator Power Cable to the

Oscilloscope Probe Power connector (rear panel).

d. Switch the Reed Pulse Generator Polarity switch to +.

5-15

11-6625-2749-14&P

Fig.

5-11.

Equipment required

Hold down the adiust the Level control to position the trace to the top graticule line (1 volt).

Release the Man switch and switch the Time Base Mode

to Norm.

g. Set the Type 7A22 VOLTS/DIV

Increase sweep Intensity to maximum (clockwise).

i. Depress the

second.

CHECK—The

Man switch is released. Readiust the Time Base Level-Slope

as necessary for proper triggering. The trace should return to within 5 mV of the reference (1 division below the graticule center) within 10

graph of typical recovery waveform.

k. Switch the

1. Set the Time Base Level/Slope to +.

Decrease sweep Intensity for normal viewing.

Reset the Time Base Mode to Auto.

Position the trace (7A22 POSITION control) to 1 divi-

sion above graticule center.

Reset the Time Base Mode to Norm.

Reed

Pulse Generator Man switch and

switch to 1 mV.

Reed

Pulse Generator Man switch for 1

waveform as the Reed Pulse Generator

/1s (5

divisions). See Fig. 5-12 for photo-

Pulse Generator Polarity switch to —.

for

step

26.

Repeat parts h through I (waveform will

from that in step 1).

r, Connect

—INPUT and repeat obove procedure.

Fig.

5-12.

Reed

Typical waveform

Pulse Generator Output

showing

overdrive recovery time,

to the

inverted

7A22

5-16

REPLACEABLE

ELECTRICAL PARTS

PARTS ORDERING INFORMATION

Replacement parts are available from or through your local Tektronix, Inc. Field Office

or recmesentative.

TM 11-6625-2749-14&P

Changes to Tektronix instruments are sometimes made to accommodate components improvements ordering parts, to include the following information in your order: Part number, instrument type ornumber, serial number, and modification

Tektronix, [nc. Field Office orrepresentative number.

Becawseof space limitations, an Item Name maysometimes further hem Name identification, utilized where possible.

they become available, and to give you the benefit of the latest circuit

developed in our engineering department, It is therefore important, when

number inapplicable.

Ifapart youhave ordered hasbeen replaced with anew orimproved part, your local

SPECIAL

Xooo

Oox

in the Parts List, an Item Name is separated from the description

Part first added at this serial number

Part rermved after this serial number

will contact you concerning any change in part

NOTES

the U.S. Federal Cataloging Handbook H6-1 can be

ITEM NAME

AND SYMBOLS

appear asincomplete.

by a

improved

colon (:).

ABBREVIATIONS

ACTR

ASSY

CAP CEF4 CKT COMP CONN ELCTLT ELEt2 INCAND LED NONWIR

ACTUATOR ASSEMBLY CAPACITOR CERAMIC CIRCUIT COMPOSITION CONNECTOR ELECTROLYTIC ELECTRICAL

INCANDESCENT LIGHT IEMITT.ING DIODE NONWIREWOUND

PLSTC QTZ RECP RES RF SEL SEMICOND SENS VAR

XFMR XTAL

PLASTIC

QUARTZ

RECEPTACLE RESISTOR

RADIO FREQUENCY SELECTED SEMICONDUCTOR SENSITIVE VARIABLE WIREWOUND TRANSFORMER

CRYSTAL

For

6-1

TM 11-6625-2749-14&P

CROSS INDEX–MFR. CODE NUMBER TO MANUFACTURER

Mfr. Code

00853 01002

01121 02111 03508

04713 08806

11237 12697 15454 15818 24931 27014 32997 56289 71400

71744 72982

73138 74970 75042

80009 80294 80740 81483 87034

91637

Manufacturer Address

SANGAMO ELECTRIC CO. , GENERAL ELECTRIC COMPANY, INDUSTRIAL AwE POWER CAPACITOR PRODUCTS DEPARTMENT ALLEN-BRADLEY COMPANY SPECTROL ELECTRONICS CORPORATION GENERAL ELECTRIC COMPANY, SEMI-CONDUCTOR PRODUCTS DEPARTMENT MO!T3ROLA, INC. , SEMICONDUCTOR PROD. DIV. GENERAL ELECTRIC CO. , MINIATURE LAMP PRODUCTS DEPARTMENT CTS XEENE, INC. CLAROSTAT MFG. CO. , INC. RODAN INDUSTRIES, INC. TELEDYNE SEMICONDUCTOR SPECIALTY CONNECTOR CO., INC. NATIONAL SEMICONDUCTOR CORP. BOURNS, INC. , SPRAGUE ELECTRIC CO. BUSSMAN MFG., EDISON CO. CHICAGO MINIATUF03 LAMP WORKS ERIE TECHNOLOGICAL PRODUCTS, INC. BECKMAN INSTRUMENTS, INC. , HELIPOT DIV. JOHNSON, TRW ELECTRONIC COMPONENTS, IRC FIXED RESISTORS, PHILADELPHIA DIVISION TEKTRONIX, INC. BOURNS, INC., BECKMAN INSTRUMENTS, INC.

INTERNATIONAL RECTIFIER CORP.

ILLUMINATED PRODUCTS INC., A SUB OF OAK INDUSTRIES, INC. DALE ELECTRONICS, INC.

TRTMPOT PRODUCTS DTV.

DIVISION OF MCGRAW-

F., CO.

INSTRUMENT DIV.

CAROLINA DIV.

P O

BOX 128

JOHN STREET

1201 2ND STREET 17070 EAST GALE

ELECTRONICS PARK

5005 E MCOOWELL RD,PO BOX 20923

NELA PARK

3230 RIVERSIDE AVE.

LOWER WASHINGTON STREET

2905 BLUE STAR ST.

1300 TERRA BELLA AVE.

3560 MADISON AVE. 2900 SEMICONDUCTOR DR. 1200 COLUMBIA AVE.

2536

4433 RAVENSWOOD AVE.

644 W. 12TH ST. 2500 HARBOR BLVD. 299 10TH AVE.

401

P O BOX 500

6135 MAGNOLIA AVE. 2500 HARBOR BLVD. 9220 SUNSET BLVD.

2620 SUSAN ST, PO BOX 11930 P. O.

UNIVERSITY ST.

BROAD ST.

BOX 609

SOUTH AVENUE

City, State, ZIip

PICKENS, SC 29671

HUDSON FALLS, NY 12839 MILWAUKEE, WI 53204 CITY OF INDUSTRY, CA 91745

SYRACUSE, NY 13201 PHOENIX, AZ 85036

CLEVELAND, OH 44112

PASO ROBLES, CA 93446

DOVER, NH 03820 ANAHEIM, CA 92806 MOUNTAIN VIEW, CA 94043

INDIANAPOLIS, IN 46227

SANTA CLARA, CA 95051

RIVERSIDE, CA 92507 NORTH ADAMS, MA 01247

ST. LOUIS, MO 63107 CHICAGO, IL 60640 ERIE ,PA FULLERTON, CA 92634 WASECA, MN 56093

PHILADELPHIA, PA 19108 BEAVERTON, OR 97077

RIVERSIDE, CA 92506

FULLERTON, CA 92634

LOS ANGELES, CA 90069

SANTA ANA, CA 92711

COLUMBUS, NE 68601

16512

6-2

REV. D SEPT. 1978

TM 11-6625-2749-14&P

Tektronix

Ckt No. Part No.

670-1013-00 670-1014-00 670-1014-01 670-1014-03 670-1014-04

670-1014-05 670-1014-06 670-1050-00 670-1050-01 670-1051-00

670-1051-01

Cu-ul

C?1O.3 CZ08A C108A Clew

C108D

CI09A

C109A C309C C109D

CIIOA CHQA C!lloc

Cnm

cn5

295-0117-00 283-0636-00 28 L-0092-00 281-0131-00 281-0131-00

283-0638-00 281-0092-00 2E11-0131-00 2s1-0081-00 283-0594-00

2$1-0092-00 281-0131-00 281-0079-00 283-0617-00 281-0092-00

Serial/Model

Eff

BO1O1OO B029999 B030000 B059999 B060000 B069999 B070000 B079999

B080000 B115479 B115480 BO1O1OO B059999

B060000

BO1O1OO B059999

BO1O1OO B059999 B060000

BO1O1OO B059999

No.

Dscont

CKT BOARD

CKT BOARD CRT BOARD CKT BOARD CKT BOARD

CKT BOARD CKT BOARD CKT BOARD CKT BOARD CKT BOARD

CKT BOARD

CAP. ,SET,MTCHD: CAP.,FXD,MICA CAP.,VAR,CER CAP.,VAR,AIR CAP.,VAR,AIR

CAP. ,FXD,MICA D:13OPF,1%,1OW CAP. ,VAR,CER DI:9-35PF,20W CAF.,VAR,AIR CAP.,VAR,AIR CAP. ,FXD,MICA D:O.OO1UF,1%,1OW

CAP. ,VAR,CER DI:9-35PF,200V CAP. ,VAR,AIR DI:2.4-24.5PF,25W CAF. ,VAR,AIR DI:l.5-9.lPF,BOW CAP. ,FXD,MICA D:47OOPF,1O%,3OOV CAP. ,VAR,CER DI:9-35PF,200V

Name & Description

ASSY:BANDWIDTB ASSY :MAIN ASSY :MAIN ASSY :MAIN ASSY :MAIN

ASSY :MAIN ASSY :MAIN ASSY:AC-GND-13C ASSY :AC-GND-DC ASSY : +AC-GND-DC

ASSY : +AC-GND-DC

(2)

O.lUF,MATCHED

D:36PF,1.4%,1OOV

DI:9-35PF,200V

DI:2.4-24.5PF,250V DI:2.4-24.5PF,25W

DI:2.4-24.5PF,250V DI:l.8-13PF,375VDC

0.1%

fvlfr Code Mfr Part Number

80009 80009 80009 80009 80009

80009

80009 OOB53 72982

74970

00853 72982 74970 74970 00853

72982

74970 00853

74970

72982

670-1013-00 670-1014-00

670-1014-01 670-1014-03 670-1014-04

670-1014-05 670-1014-06 670-1050-00 670-1050-01 670-1051-00

670-1051-01

295-0117-00 D155F360G0

538-011 D9-35

189-509-5

D151F131F0 538-011 D9-35

189-509-5

189-6-5 D151F102FO

538-011 D9-35

189-509-5

189-4-5 D193F472K0

53B-011 D9-35

cl15

C141 C144 C144 CI.56

C208D C2!39A

C209A C209C C209D

cam

C21OA

C210C

c21cm c215

C215

C241

C244

c256

C264

C2$%3

281-0131-00

281-0093-00 281-0544-00 281-0122-00 283-0594-00

295-0117-00 283-0636-00 281-0092-00 281-013’1-00

281-0131-00

283-0638-00

281-0092-00

2131-0131-00 281-0081-00 283-0594-00

281-0092-00

281-0131-00

201-0079-00

283-0617-00

281-0092-00

281-0131-00

281-0093-00

281-0544-00

203-0594-00

283-0059-00

290-0284-00

B060000

BO1O1OO B079999 B080000

BO1O1OO B059999 B060000

BOIO1OO B059999 B060000

BO1O1OO B059999

B060000

CAP. ,VAR,AIR DI:2.4-24.5PF,25W CAP. ,VAR,CER DI:5.5-18PF CAP. ,FXD,CER DI:5.6PF,1O%,5OOV CAP. ,VAR,CER DI:2.5-9PF,1OOV CAP. ,FXD,MICA D: O. OO1UF,1%,1OOV

CAP. ,SET, MTCHD: CAP. ,FXD,MICA D:36PF,1.4%,1OOV CAP. ,VAR,CER DI:9-35PF,20W CAP. ,VAR,AIR DI:2.4-24.5PF,250V CAP. ,VAR,AIR DI:2.4-24.5PF,25W

CAP.,FXD,MICA CAP. ,VAR,CER DI:9-35PF,200V CAP.,VAR,AIR CAP.,VAR,AIR CAP.,FXD,MICA

CAP. ,VAR, CER DI:9-35PF,20W CAP.,VAR,AIR CAP.,VAR,AIR CAP. ,FXD,MICA D:47OOPF,1O%,3OW

CAP. ,VAR,CER DI:9-35PF,20W

CAP.,VAR,AIR CAF.,VAR,CER CAP. ,FXD,CER DI:5.6PF,1O%,5OW

CAP. ,FXD,MICA D: O. OO1UF,1%,1OOV CAP. ,FXD, CER DI:lUF, +80-20 %,25V

CAP. ,FXD, ELCTLT:4.7UF,1O%,35V

(2)

O.lUF, MATCHED

D:13OPF,1%,1OOV

DI:2.4-24.5PF,250V

DI:l.8-13PF,375VDC

D:O.OO1UF,1%,1OOV

DI:2.4-24.5PF,250V DI:l.5-9.lPF,BOOV

DI:2.4-24.5PF,250V DI:5.5-18PF

0.1%

74970

72982 72982 72982 00853

80009 00853 72982

74970

00853

729B2

74970 74970 00853

72982 74970

74970

00853

72982

74970

72982

00853

72982

56289

189-509-5 538-011A5.5-18 301-000cOH0569D 518-000A2. 5-9

D151F102FO

295-0117-00

D155F360G0

538-011 D9-35 189-509-5 189-509-5

D151F131F0 53B-011 D9-35 189-509-5 189-6-5

D151F102FO

538-011 D9-35 189-509-5 189-4-5

D193F472K0

538-011 D9-35

189-509-5 538-012A5.5-18 301-OOOCOH0569D

D151F102FO

B141NO37Z5UO1O5Z

150D475X9035B2

REV. G SEPT. 1978

6-3

TM 11-6625-2749-14&P

Ckt No. Part No,

Tektronix

C307 C315 C317 C325 C329

C330 C349 C353A C353D C353G

C413

C425 C426A C426B C426C

c426D C426E C426F C426G C426H

C443

C445 C447 C513 C543

C545

C547 C61O C62 O C630

290-0297-00 281-0613-00 290-0297-00 290-0297-00 283-0002-00

281-0114-00 290-0177-00 285-0809-00 285-0809-00 283-0058-00

281-0534-00 281-0093-00 281-0528-00 283-0604-00 283-0594-00

285-0627-00 285-0598-00 285-0702-00 285-0703-00 285-0633-00

283-0000-00 283-0092-00 283-0111-00 281-0534-00 283-0000-00

283-0059-00 283-0134-00 283-0080-00 283-0080-00 283-0080-00

Serial/

Eff

Model

No,

Dscont

Name & Description

CAP. ,FXD, ELCTLT:39UF,1O%,1OV CAP. ,FXD,CER DI:10PF,+/-1PF,200V CAP. ,FXD,ELCTLT:39UF,1O% CAP. ,FXD,ELCTLT:39UF,1O% CAP. ,FXD,CER DI:0.01uF,+80-20%,500V

CAP. ,VAR, AIR DI:1.3-5.4PF,750V CAP. ,FXD,ELCTLT:lUF CAP. ,FXD, PLSTC :1 UF,1O% ,50V CAP. ,FXD,PLSTC :1UF,1O%,5OV CAP. ,FXD,CER DI:O.O27UF,1O%,1OOV

CAP. ,FXD,CER DI:3.3PF,+/-0.25PF,500V CAP. ,VAR,CER DI:5.5-18PF CAP. ,FXD, CER DI:82PF, +/-8.2 PF,500v CAP. ,FXD, MICA D:304PF,2%,300V CAP. ,FXD,MICA D:O.OO1UF,1%,1OOV

CAP. ,FXD, PLSTC :0. 0033 UF,5% , 100v CAP. ,FXD, PLSTC :0. 01UF,5% ,1OOV CAP. ,FXD, PLSTC :0.033UF, 5% ,1OOV CAP. ,FXD, PLSTC:0.1UF,5%,1 CAP. ,FXD, PLSTC:0.22UF,20%,1

CAP. ,FXD, CER DI:O. OOIUF, +1 OO-O%,5OOV CAP. ,FXD, CER DI:0.03uF, +80-20 %,200V CAP. ,FXD,CER DI:0.1UF,20%,50V CAP. ,FXD, CER DI:3.3PF, +/-0.25 PF,500V CAP. ,FXD,CER DI:O.OO1UF,+1OO-O%,5OOV

CAP. ,FXD, CER DI:lUF, +80–20%,25V CAP. ,FXD, CER DI:0.47uF, +80-20 %,50v CAP. ,FXD, CER DI:0.022uF, +80-20 %,25V CAP. ,FXD, CER DI:0.022uF, +80-20 %,25V CAP. ,FXD,CER DI:0.022uF,+80-20%,25V

20% ,50V

,1OV ,1OV

OOV

Mfr

Code Mfr Part Number

56289 72982

56289 56289

72982

74970

56289 56289 56289

72982

72982 72982 00853

00853

56289 01002 56289 56289 56289

72982 72982 72982 72982 72982

72982 72982 56289 56289 56289

15 OD396X9O1OB2 374-OO1COGO1OOF 15 OD396X9O1OB2 15OD396X9O1OB2 811-546E103Z

189-0352-075

162 D105xOO5OCD2 LP66A1A105K LP66A1A105K

8131N147x7R0273K

301-OOOCOJ0339C

538-011A5 .5-18

301-OOOU2M0820K D153F3040G0 D151F102FO

41OP33251

61 F1OAC1O3

41OP33351

41OP1O451 41 OP22491

831-516 E102P 845-534E303z 8121 -NO88Z5U1O4M

301-OOOCOJ0339C 831-516E102P

8141NO37Z5UO1O5Z

8141 N077z5u0474z

19C611

CRIS9 CRI.20 CR131

cR144 CR219

CR22 O CR244 CR260

CR309 CR341

CR343 CR413

CR415 CR417 CR419

CR513 CR515 CR517 CR519 CR61O

CR615

CR618

CR62 O

152-0323-00 152-0323-00 152-0141-02 152-0141-02 152-0323-00

152-0323-00 152-0141-02 152-0141-02 152-0141-02 152-0141-02

152-0141-02 152-0141-02 152-0141-02 152-0141-02 152-0141-02

152-0141-02 152-0141-02 152-0141-02

SEMICOND DEVICE: SILICON,35V,0.1A SEMICOND DEVICE: SILICON,35V,0.1A SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,35V,0.1A

SEMICOND DEVICE:SILICON,35V,0.1A SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE: SILICON,3DV,150MA SEMICOND DEVICE :SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE: SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE: SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA

SEMICOND DEVICE:SILICON,30V,150MA SEMICOND DEVICE,SILICON,30V,150MA SEMICOND DEVICE:SILICON,30V,150MA

80009 80009 80009 80009 80009

80009 80009 80009

152-0323-00 152-0323-00

152-0141-02 152-0141-02 152-0323-00

152-0323-00 152-0141-02 152-0141-02 152-0141-02 152-0141-02

152-0141-02 152-0141-02 152-0141-02 152-0141-02 152-0141-02

152-0141-02 152-0141-02

152-0141-02 152-0141-02 152-0141-02

152-0141-02

6-4

REV. D SEPT. 1978

TM 11-6625-2749-14&P

Ckt No.

CR630

Dslol Dslol Dslol DS301

F119 ??219

Jlol J1OI J201 J201

Q133 Q133 Q144 Q153 Q253

Q264 Q273 Q283 Q284 Q304

Q314 Q324 Q334 Q344 Q354

Tektronix Serial/Model No.

Part No.

152-0141-02

150-0093-00 150-0057-01 150-004s-01 150-0046-00

159-0024-00 159-0024-00

131-0679-00 131-06’?9-02 131-0679-00 131-0679-02

151-1027-00 151-1101-00 151-0261-00 151-1028-00 151-1028-00

151-0261-00 151-0128-00 151-0128-00 151-o195-oo 151-0260-00

151-0220-00 151-0228-00 151-0228-00 151-0195-00 151-0195-00

Eff

BO1O1OO B039999 B040000 B059999 B060000

BO1O1OO Bo93219 B093220 BO1O1OO 5093219 B093220

BO1O1OO B099999 B1OOOOO

Dscont

Name & Description

SEMICOND DEVICE:SILICON,30V,150NA

LAMP, INcAND:5.0v,0.06A IAMP,INCAND:5V,0.115A,WIRX LAMP,INCAND:5V,0.06A,SEL LANP, INCAND:lOV, O.O4A

FUSE,CARTRIDGE:3AG,0.06A,250V,FAST FUSE,CARTRIDGE:3AG,0.06A,250V,FAST

CONNECTOR,RCPT, CONNECTOR,RCPT, CONNECTC)R,RCPT, CONNECTOR, RCPT, :BNC W/HARDWAF03

TRANSISTOR : SILICON, JPE ,N-CHAN TRANSISTOR: SILICON, FET,N CHANNEL TRANSISTOR: SILICON, PNP, DUAL TRANSISTOR:SILICON,FET,N TRANSISTOR:SILICON,FET,N

TRANSISTOR : S ILICON , PNP , DUAL TRANSISTOR:GE TRANSISTOR : GE , PNP TRANSISTOR:SILICON TRANSISTORS

TRANSISTOR:SILICON,PNP TRANSISTOR:SILICON,PNP,SEL TRANSISTOR: SILICON, PNP, SEL FR13M 2N4888 TRANSISTOR:SILICON TRAWSISTOR:SILICON

:BNC W/HARI)WAF03 :BNC W/HARDWARE

:BNC W/HARDWARX

,PNP

ILICON,NPN

,NPN

,NPN ,NPN

LD,SEL

CHANNEL CRANNEL

FROM 2N4888

lvlfr

Code

Mfr

Part Number

80009

71744 87034 08s06 08806

BLOW BLOW

71400 71400

24931 24931 24931 24931

80009 27014 80009 15818 15818

80009 04713 04713 80009 80009

80009 80009 80009 80009 80009

152-0141-02

6833AS15 17AS15 683AS15 2107D

AGC 1/16 AGC 1/16

28JR168-1 28JR270-1 28JR168-1 28JR270-1

151-1027-00 2N5565 151-0261-00 u1908 u1908

151-0261-00 2N2140 2N2140 151-0195-00 151-0260-00

151-0220-00 151-0228-00 151-0228-00 151-0195-00 151-0195-00

Q404 Q404 Q414 Q424 Q434

Q444 Q454 Q524 Q534 Q544

Q554 Q614 Q614

FLlo3 Hlo8c R108D EIIOSE FU09C

R109D R109E Ruoc RlloD RL1OE

Qt3.lo??

Fall

151-1019-00 151-1050-00 151-0261-00 151-0219-00 151-0219-00

151-0219-00 151-0219-00 151-0219-00 151-0219-00 151-0219-00

151-0219-00 151-0254-00 151-0281-00

315-0105-00 323-0611-07 321-0389-01 311-0609-00 323-0614-07

321. -O289-OO 311-0605-00 323-0623-07 321-0197-00 311-0609-00

321-0289-01 321-0481-07

5010100 8070000

BO1O1OO B11661O

B069999

B116609

TRANSISTOR : S ILICON ,FET ,N-CHANNSL TIUiNSISTOR:S ILICON,FET,N—CHANNEL TRANSISTOR:SILICON TRANSISTOR: SILICON, PNP TRJJNSISTOR:SILICON

TRANSISTOR:SILICON TRANSISTOR: SILICON, PNP TRAWS ISTOR : SILICON , PNP TRANSISTOR:SILICON TRANSISTORS

TRANSISTOR:SILICON TRANSISTY3R:SILICON, TRANSISTOR : SILICON ,NPN

RSS.,FXD,CMPSN:I.N RES. ,FXD,FILM:900K

FCSS.

,FXD,FILM:11OK RES. ,VAR,NONWIR:2K RES. ,FXD,FILW:990K

RES. ,FXD, FILM:1OK OHM,l%,O.125W RES. ,VAR,NONWIR:200 RES. ,FXD, FILM:999K OHM, O.1%,0.5W RES. ,FXD, FILN:l.lK OHM,l%, O.125W RES. ,VAR, NONWIR:2K OHM,lO%, O.5OW

RES. ,FKD, FILM:1OK 0HM,0.5%,0.125w RES. ,FXD, FILN:I.N OHN, O.1%,125W

ILICON,PNP

,PNP,DUAL

,PNP

NPN

0HM,5%,0.25w

OHN,O.1%,0.5W 0SM,0.5%,0.125W ORM,1O%,O.5OW OHM,O.1%,0.5W

OHM,1O%,O.5OW

,DUAL

80009 80009 80009 80009 80009

80009 80009 80009 80009 SOO09

80009 80009 0350s

01121 91637 91637 73138 91637

91637 80740 91637 91637

73138

91637 91637

151-1019-00 151-1050-00 151-0261-00 151-0219-00 151-0219-00

151-0219-00 151-0219-00 151-0219-00 151-0219-00 151-0219-00

151-0219-00 151-0254-00 X16P4039

CB1055 NFF1226C90002B NPF1816G11OO2D 82-26-O NPF1226C99002B

NFF1816G1OOO1F 62-54-3 MFF1226C99902B NPF1S16G11OOOF 82-26-O

MPF1816G1OOO1D HNF18SC1OOO3B

REV. G SEPT.

197S

6-5

TM 11-6625-2749-14&P

Ckt

R115 Rl15 R116 R117 Rl19

R121 R123 R133 R141 R145

R151 R153 R155 R157 R159

R203 R208C R208D R209c R209D

R2 10C R2 10D R21OF R211 R215

R215 R217 R219 R227 R233

Tektronix Serial/ Model No,

No.

Part No.

311-0827-00 311-1260-00 311-0635-00 321-0210-00 315-0510-00

321-0344-00 315-0151-00 308-0495-00 315-0512-00 321-0289-00

308-0546-00 321-0114-00 315-0101-00 321-0030-00 308-0436-00

315-0105-00 323-0611-07 321-0389-01 323-0614-07 321-0289-00

323-0623-07 321-0197-00 321-0289-01 323-0481-07 311-0827-00

311-1260-00 321-0222-00 315-0510-00 315-0562-00 308-0495-00

Eff

Dscont Name & Description

BO1O1OO B069999 B070000

BO1O1OO B069999

B070000

RES. ,VAR,NONWIR:TRMR,250 RES. ,VAR,NONWIR:250 OHM,1O%,O.5OW RES. ,VAR, NONWIR:lK OHM,lO%, O.5OW RES. ,FXD,FILM:l.5K OHM,l%,O.125W RES. ,FXD, CMPSN:51 0HM,5%,0.25w

RES. ,FXD, FILM:37.4K OHM,l%, O.125W RES. ,FXD, CMPSN:150 0HM,5%,0.25w RES. ,FXD,WW:4.5K OHM, O.1% RES. ,FXD,CMPSN:5.1K 0HM,5’%,0.25w RES. ,FXD,FILM:1OK OHM,l%,O.125W

RES. ,FXD, WW:125 OHM, O.1%,3W RBS. ,FXD, FILM:150 OHM,l%, O.125W RES. ,FXD,CMPSN:1OO 0HM,5%,0.25w REs.,

FXD, FILM:20 OHM,l%, O.125W

RES. ,FXD,WW:2K OHM,O.1%,3W

RES. ,FXD,CMPSN:lM 0HM,5%,0.25w RES. ,FXD,FILM:900K OHM,O.1%,0.5W RES. ,FXD,FILM:11OK 0HM,0.5%,0.125w RES. ,FXD,FILM:990K OHM,O.1%,0.5W RES. ,FXD,FILM:1OK OHM,l%,O.125W

RFS. ,FXD, FILM:999K OHM, O.1%,0.5W RES. ,FXD, FILM:l.lK OHM,l%, O.125W RES. ,FXD,FILM:1OK 0HM,0.5%,0.125w RES. ,FXD,FILM:lM OHM,O.1%,0.50W RRS. ,VAR,NONWIR:TRMR,250

RES. ,VAR,NONWIR:250 OHM,1O%,O.5OW RES. ,FXD,FILM:2K OHM,l%,O.125W RES. ,FXD, CMPSN:51 0HM,5%,0.25w RES. ,FXD, CMPSN:5.6K 0HM,5%,0.25w RES. ,FXD, WW:4.5K OHM, O.1%

OHM,O.5W

Mfr Code Mfr Part Number

01121 32997 73138 91637 01121

91637

01121

91637 01121

91637

91637 91637

01121

91637 91637

01121 91637

91637 91637 91637

91637

75042

01121

32997

91637

01121

91637

SV2511 3329 P-L58-251 82-32-O MFF1816G15000F CB5105

MFF1816G37401F CB1515 RS2B11O-45OOOB CB5125 MFF1816G1OOO1F

RS2B11O-125ROB MFF1816G150ROF CB1015 MFF1816G20ROOF RS2B-A20000B

CB1055 MFF1226C90002B MFF1816G11OO2D MFF1226c99002B MFF1816G1OOO1F

MFF1226c99902B MFF1816G11OOOF MFF1816G1OOO1D CECT9-1OO4B SV2511

3329P-L58-251 MFF1B16G20000F CB5105 CB5625 RS2B11O-45OOOB

R241 R245 R251 R253 R255

R256 R257 R258 R259 R261

R263 R264 R265 R267 R269

R270 R271 R273 R275 R277

R279 R281 R283

315-0512-00 321-0289-00 308-0546-00 321-0114-00 315-0101-00

315-0185-00 321-0030-00 311-0467-00 308-0436-00 321-0126-00

321-0385-00 321-0414-00 311-0887-00 321-0385-00 321-0126-00

311-0889-00 308-0436-00 321-0114-00 311-0532-00 321-0114-00

308-0436-00 321-0126-00 323-0220-00

RES. ,FXD, CMPSN:5.lK 0HM,5%,0.25w RES. ,FXD,FILM:1OK OHM,l%,O.125W RES. ,FXD,WW:125 OHM,O.1%,3W RES. ,FXD,FILM:150 OHM,l%,O.125W RES. ,FXD, CMPSN:1OO 0HM,5%,0.25w

RES. ,FXD,CMPSN:l.8M 0HM,5%,0.25w RES. ,FXD,FILM:20 OHM,l%,O.125W RRS. ,VAR,NONWIR:1OOK 0HM,20%,0.50w RES. ,FXD,WW:2K OHM,O.1%,3W RES. ,FXD,FILM:200 OHM,l%,O.125W

RES. ,FXD,FILM:1OOK OHM,l%,O.125W RES. ,FXD,FILM:200K OHM,l%,O.125W RRS. ,VAR, NONWIR:50K OHM,lO%, O.5OW RES. ,FXD,FILM:1OOK OHM,l%,O.125W RES. ,FXD,FILM:200 OHM,l’%,0.125W

RES. ,VAR,WW:PNL,5K OHM,lW RES. ,FXD, WW:2K OHM, O.1%,3W RES. ,FXD,FILM:150 OHM,l%,O.125W RES. ,VAR, WW:TRMR,l.5K OHM,lW RES. ,FXD, FILM:150 OHM,l%, O.125W

RES. ,FXD,WW:2K OHM,O.1%,3W RES. ,FXD,FILM:200 OHM,l%,O.125W RES. ,FXD, FILJ.1:1.91K OHM,l%, O.50W

01121 91637 91637 91637

01121

01121 91637

11237

91637 91637

91637 91637 80009 91637 91637

02111

91637 91637 80294 91637

91637

75042

CB5125 MFF1816G1OOO1F RS2B11O-125ROB MFF1816G150ROF CB1015

CB1855 MFF1816G20ROOF 300sF-41334 RS2B-A20000B MFF1816G200ROF

MFF1816G1OOO2F MFF1816G20002F

311-0887-00 MFF1816G1OOO2F MFF1816G200ROF

162-214 RS2B-A20000B MFF1816G150ROF 3345P-1-152 MFF1816G150ROF

RS2B-A20000B MFF1816G200ROF CECTO-1911F

6-6

RIV. E SEPT. 1978

TM 11-6625-2749-14&P

Tektronix

Ckt No. Part No.

R285 R287 R289 F(291 R293

R301 R303 R305 R307 R309

R311 R313 R315 R323 R325

R331 R333 R335 R337 R341

R343 R345

R349 R351 R35 3A

321-0423-00 308-0633-00 308-0633-00

321-0423-00 323-0214-00

323-0256-00 317-0511-00 315-0103-00 315-0130-00 315-0512-00

315-0513-00 315-0101-00 315-0222-00 301-0562-00 321-0160-00

315-0473-00 315-0433-00 321-0184-00 315-0104-00 315-0364-00

315-0363-00 315-0105-00 315-0204-00 315-0151-00 321-0303-00

Serial/Model

Eff Dscont Name & Description

No.

RES. ,FXD,FILM:249K OHM,l%,O.125W RES. ,FXD,WW:475 OHM,O.1%,3W RES. ,FXD,WWZ475 OHM,O.1%,3W RES. ,FXD,FILM:249K OHM,l%, O. RES. ,FXD,FILM:1.65K OHM,l%,O.50W

RES. ,FXD,FILM:4.53K OHM,lk,O.50W RES. ,FXD,CMPSN:51O 0HM,5%,0.I.25W RES. ,FXD,CMPSN:1OK 0HM,5%,0.25w RES. ,FXD,CMPSN:13 OHM,5%,3.25W RES. ,FXD,CMPSN:5.1K OHM,5’k,O.25W

RES. ,FXD,CMPSN:51K 0HM,5%,0.25W RES. ,FXD, CMPSN:1OO 0HM,5%,0.25W RES. ,FXD,CMPSN:2.2K CSdM,5%,0.25W RES. ,FXD,CMPSN:5.6K 0HM,5%,0.50w RES. ,FXD,FILM:453 OHM,l%,O.125W

RES. ,FXD,CMPSN:47K 0HM,5%,0.25w

RES. ,FXD, CMPSN:43K 0HM,5%,,0.25w

RES. ,FXD,FILM:806 OHM,l%,().125W RES. ,FXD,CMPSN:1OOK 0HM,5%,0.25w RES. ,FXD,CMPSN:360K 0HM,5%,0.25w

RES. ,FXD,CMPSN:36K 0HM,5%,0.25w RES. ,FXD,CMPSN:lM 0HM,5%,().25w

RKS. ,FXD,CMPSN:200K 0HM,5%,0.25w RES. ,FXD,CMPSN:150 0HM,5%,0.25w RES. ,FXD, FILM:14K OHM,l%, O.125W

I.25W

Mfr Code Mfr Part Number

91637 91637 91637 91637 75042

75042 01121 01121 01121 01121

01121 01121 01121 01121 91637

01121 01121

91637 01121 01121

01121 01121 01121 01121 91637

MFF1816G24902F RS2E-B475ROB RS2E-B475ROB

MFF1816G24902F

CEC’10-1651F

CECTO–4531F BB5115 CB1035 CB1305 CB5125

CB5135 CB1015 CB2225 EB5625 MFF1816G453ROF

CB4735 CB4335 MFF1B16G806ROF CB1045 CB3645

CB3635 CB1055 CB2045 CB1515 MFF1316G14001F

R353B R353C

R353D

R353E R353F

R401

R403 R405 R407A R407B

R407C R407D R407E R407F R407G

R407H R407J R407K R409 R413

R421 R423 R425 R425 R427

R4301 R4301 R431

321-0408-00 301-0165-00 321-0303-00 321-0408-00 301-0165-00

315-0202-00

321-0272-00

321-0039-00 321-0001-01 321-0762-01

321-1068-01 321-0098-01 321-0127-01 321-1166-01 321-0763-07

321-1231-01 321-1289-01 321-0332-00 321-0343-00 321-0361-00

321-0614-00 315-0101-00 311-0704-00 311-1261-00 321-0227-00

311-0888-00 311-0888-01 321-0334-00

BO1O1OO B069999 B070000

RES. ,FXD,FILM:174K OHM,l%, O.125W RES. ,FXD,CMPSN:1.6M 0HM,5%,0.50W RES. ,FXD,FILM:14K OHM,l%,O.125W RES. ,FXD,FILM:174K OHM,l%,O.125W RES. ,FXD,CMPSN:l.6M 0HM,5%,0.50W

RES. ,FXD,CMPSN:2K 0HM,5%,0.25w RES. ,FXD, FILM:6.65K OHM,l?, O.125W RE3. ,FxD,FILM:24.9 OHM,l%,O.125W RES. ,FXD,FILM:1O OHM,O.5%,0.125W RES. ,FXD,FILM:20.1 OHM,O.5%,0.125W

RES. ,FXD,FILM:50.5 OHM,O.5%,0.125W RES. ,FXD,FILM:102 OHM,O.5%,0.125W RES. ,FXD, FILM:205 OHM, O.5%,0.125W RES. ,FXD,FILM:530 OHM,O.5%,0.125W RES. ,FXD,FILM:l.12K OHM,O.1%,3.125W

RES. ,FXD,FILM:2.52K OHM,O.5%,2.125W RES. ,FXD,FILM:1O.1K OHM,O.5%,().125W RES. ,FXD,FILM:28K OHM,l%,O.125W RES. ,FXD,FILM:36.5K OHM,l%,O..125W RES. ,FXD,FILM:56.2K OHM,l%,O.L25W

RES. ,FXD,FILM:1O.1K OHM,l%,O..L25W RES. ,FXD,CMPSN:1OO 0HM,5%,0.2!5w RES.,VAR,NONWIR:TRMR,500 RES. ,VAR,NONWIR:500 OHM,1O%,O,5OW

RES. ,FXD,FILM:2.26K OHM,l%,O.:L25W

RRS. ,VAR,NONWIR:PNL,2X1OK RES. ,VAR, NONWIR:PNL,2X1OK 3HM,0.5W RES. ,FXD,FILM:29.4K OHM,l%,O.:L25W

OHM,O.5W

r3HM,o.5w

91637 01121 91637 91637 01121

01121 91637 91637 91637 91637

91637 91637 91637 91637 91637

91637 91637

91637 91637 91637

91637

01121

73138

32997 91637

12697 12697 91637

MFF1316G17402F EB1655 MFF11316G14001F MFF11316G17402F EB1655

CB20.25 MFF11316G66500F MFF1[316G24R90F MFF1[316G1OROOD

MFF1I316G2OR1OD

MFF11316G50R50D MFF1I)16G102ROD MFF1[116G205ROD MFF1816G530ROD MFF1816C11200B

MFF1816G25200D MFF1W16G101O1D MFF1016G2EOO1F MFF1816G36501F MFF1816G56201F

MFF1816G101O1F CB1OI.5

91-101-0

3329P-L58-501 MFF1816G22600F

381-CM40098 D381S-CM40098 MFF1016G294O1F

lFurni~h~d as a unit with S622.

F..FJ. H SEPT. 1978

6-7

TM 11-6625-2749-14&P

Tektronix Serial/ Model No,

Ckt No. Part No.

R432 R433 R434 R436 R437

R440 R440 R441 R441 R443

R443 R443 R445 R445 R450

R450 R451

R451 R453 R453

R457 R457 R458 R459 R501

R503 R505 R505 R509 R513

321-0164-00 321-0335-00

321-0211-00 321-0197-00 321-0260-00

321-0143-00 321-0149-00 321-0222-00 321-0202-00 317-0561-00

317-0391-00 315-0391-00 321-0251-00 321-0231-00 321-0147-00

321-0149-00 321-0222-00 321-0202-00 321-0251-00 321-0231-00

317-0241-00 315-0241-00 301-0470-00

315-0510-00

315-0202-00

321-0272-00 311-0839-00 311-1258-00 321-0343-00 321-0361-00

Eff

BO1O1OO B030000 BO1O1OO B030000 BO1O1OO

B030000

BO1O1OO B030000 BO1O1OO

B030000

BO1O1OO B030000 BO1O1OO B030000

BO1O1OO

BO1O1OO B099999 B1OOOOO

Dscont

B029999

B089999

B029999

B089999

Name & Description

RES. ,FXD,FILM:499 RRS. ,FXD,FILM:30.lK RES. ,FXD,FILM:1.54K RES. ,FXD, FILM:l.lK OHM,l%, O.125W RBS. ,FXD,FILM:4.99K

RES. ,FXD,FILM:301 RES. ,FXD, FILM:348 OHM,l%, O.125W RES. ,FXD,FILM:2K RES. ,FXD, FILJ!:l.24K OHM,l%, O.125W RES. ,FXD, CMPSN:560 0HM,5%,0.125W

RES. ,FXD,CMPSN:390 RES. ,FXD,CMPSN:390 RES. ,FXD, FILM:4.02K OHM,l%, O.125W RES. ,FXD,FILM:2.49K RES. ,FXD, FILM:332 OHM,l%, O.125W

RES. ,FXD, FILM:348 OHM,l%, O.125W RES. ,FXD, FILM:2K OHM,l%, O.125W RES. ,FXD,FILM:1.24K RES. ,FXD,FILM:4.02K RFS. ,FXD, FILM:2.49K OHM,l%, O.125W

RES. ,FXD, CMPSN:240 0HM,5%,0.125W RES. ,FXD,CMPSN:240 RES. ,FXD, CMPSN:47 0HM,5%,0.50W RES. ,FXD, CMPSN:51 0HM,5%,0.25w RFS. ,FXD, CMPSN:2K 0HM,5%,0.25w

RES. ,FXD,FILM:6.65K RES. ,VAR,WW:TRMR,50 RES. ,VAR,NONWIR:50 RES. ,FXD,FILM:36.5K RES. ,FXD,FILM:56.2K

OHM,l%,O.125W

OHM,l%,O.125W OHM,l%,O.125W

OHM,l%,O.125W

0HM,5%,0.125W 0HM,5%,0.25w

OHM,l%,O.125W

OHM,l%,O.125W OHM,l%,O.125W

0HM,5%,0.25w

OHM,l%,O.125W OHM,O.5W

OHM,1O%,O.5OW

OHM,l%,O.125W OHM,l%,O.125W

Mfr Code Mfr Part Number

91637 91637 91637 91637 91637

91637 91637 91637 91637 01121

01121 01121 91637 91637 91637

91637 91637 91637 91637 91637

01121 01121 01121 01121 01121

91637 80294 32997 91637 91637

MFF1816G499ROF MFF1816G301O1F MFF1816G15400F MFF1816G11OOOF MFF1816G49900F

MFF1816G301ROF MFF1816G348ROF MFF1816G20000F MFF1816G12400F BB5615

BB3915

CB3915 MFF1816G40200F MFF1816G24900F MFF1816G332ROF

MFF1816G348ROF MFF1816G20000F MFF1816G12400F MFF1816G40200F MFF1816G24900F

BB2415 CB2415 EB4705 CB5105 CB2025

MFF1816G66500F

3305P-1-500

3326 P-T02-500 MFF1816G36501F MFF1816G56201F

R521 R523 R527 R531 R532

R533 R534 R5351 R540 R541

R541 R543

R543 R543 R545

R545 R551 R551 R553 R553

R557 R557 R559

Furnished as a unit with S535

321-0614-00 315-0101-00 321-0227-00 321-0334-00 321-0164-00

321-0335-00 321-0211-00 311-0949-00 311-0702-00 321-0222-00

321-0202-00 317-0561-00 317-0391-00 315-0391-00 321-0251-00

321-0231-00

321-0222-00

321-0202-00 321-0251-00 321-0231-00

317-0241-00

315-0241-00 315-0510-00

BO1O1OO B029999

B030000 BO1O1OO B029999 B030000 B089999 B090000 BO1O1OO B029999

B030000 BO1O1OO B029999 B030000 BO1O1OO B029999 B030000

BO1O1OO B089999 B090000

RES. ,FXD, FILM:1O.1K OHM,l%, O.125W RES. ,FXD, CMPSN:1OO 0HM,5%,0.25w RES. ,FXD, FILM:2.26K OHM,l%, O.125W RES. ,FXD, FILM:29.4K OHM,l%, O.125W RFS. ,FXD, FILM:499 OHM,l%, O.125W

RES. ,FXD, FILM:30.lK OHM,l%, O.125W RES. ,FXD, FILM:l.54K OHM,l%, O.125W RES. ,VAR,NONWIR:2K RES. ,VAR,NONWIR:250 RES. ,FXD, FILM:2K OHM,l%, O.125W

RES. ,FXD,FILM:1.24K RES. ,FXD,CMPSN:560 RES. ,FXD,CMPSN:390 RES. ,FXD,CMPSN:390 RES. ,FXD, FILM:4.02K OHM,l%, O.125W

RFS. ,FXD,FILM:2.49K RES. ,FXD,FILM:2K RES. ,FXD, FILM:1.24K OHM,l%, O.125W RES. ,FXD, FILM:4.02K OHM,l%, O.125W RES. ,FXD, FILJl:2.49K OHM,l%, O.125W

RES. ,FXD,CMPSN:240 RES. ,FXD, CMPSN:240 0HM,5%,0.25w RES. ,FXD;CMPSN:51

OHM,1O%,O.5OW

OHM,l%,O.125W 0HM,5%,0.125w 0HM,5%,0.125w 0HM,5%,0.25w

OHM,l%,O.125W

0HM,5%,0.125w

OHM,i%,O.25W

91637 01121 91637 91637 91637

91637 91637 01121 12697 91637

91637 01121 01121 01121 91637

91637 91637 91637 91637 91637

01121 01121 01121

MFF1816G101O1F CB1015 MFF1816G22600F MFF1816G29401F MFF1816G499ROF

MFF1816G301O1F MFF1816G15400F WA1G040S202UA 382-cM39823 MFF1816G20000F

MFF1816G12400F

BB5615

BB3915 CB3915 MFF1816G40200F

MFF1816G24900F MFF1816G20000F MFF1816G12400F MFF1816G40200F MFF1816G24900F

BB2415 CB2415 CB5105

6-8

REV. I SEPT. 1978

TM 11-6625-2749-14&P

Tektronix

Na.

Part No.

Ckt

315-0154-00 315-0753-00 315-0753-00 315-0154-00 315-0753-00

315-0753-00 315-0123-00 321-0344-00 .315 -0753-00 315-0154-00

R618N

R620 FM522 R630 R632

R632 R634 R634

RT221 RT223

sKm,B~

S1OIA,B1 ----S1CM32

315-0513-00 321-0223-00 315-0222-00

315-0104-00

317-0223-00

315-0223-00 317-0203-00 315-0203-00

307-0181-00 307-0181-00

-----

670-1014-00

S1082 670-1014-01

S1C182

S1082

.s201A, B3 ----S201A, B3 ----$3532 S4072

S4072 S4072 s4262 S535 ~ S622 ~

670-1014-03

670-1014-04

-----

670-1013-00 670-1014-00

670-1014-03 670-1014-04 670-101.3-00 311-0949-00 311-0888-00

311-0888-01

vR27cl VR271 VR305 VR305

VR320 VR325

VR330

152-0212-00 152-(3405-00 152-0306-00 152-(3168-00

152-02 s0-00 152-0212-00

152-0280-00

Serial/Model No.

Eff

Dscont

5030000 B089999

B090000

Bololoo B089999 B090000

Bololoo FI059999 13060000 33010100 B029999 13030000 B059999 B060000 B069999

B070000

BO1OIOO B059999 B060000

B060000 B069999 B070CU30

5010100 B069999

B070000

BO1OIOO B029999 B030CM30

Name &

Description Code

RZS. ,FXD, CMPSN:150K 0HM,5%,0.25W S2ZS. ,FXD, CMPSN:75K 0HN,5%,0.25W RES. ,FXD, CMPSN:75K 0HM,5%,0.25W RES. ,FXD, CMPSN:150K 0HN,5%,0.25W RES. ,FXD, CMPSN:75K 0WM,5%,0.25W

RES. ,FXD, CNPSN:75K 0HM,5%,0.25W RES. ,FXD, CMPSN:12K 0HM,5%,0.25W F.ES. ,FXD, FIIJ4:37.4K OHM,l%, O.125W RES. ,FXD, CMPSN:75K 0HM,5%,0.25W RES. ,FXD, CMPSN:150K 0HM,5%,0.25W

RES. ,FXD, CMPSN:51K 0HM,5%,0.25W RES. ,FXD, FILN:2.05K OHM,l%, O.125W RES. ,FXD, CMPSN:2.2K 0HN,5%,0.25W RES. ,FXD, CMPSN:1OOK 0HM,5%,0.25W RES. ,FXD, CMPSN:22K 0HN,5%,0.125W

RES. ,FXD, CMPSN:22K OHM,5%,0.25W RES. ,FXD, CMPSN:20K 0HM,5%,0.125W

FC3S. ,FXD, CMPSN:20K 0HM,5%,0.25W

FX2S. ,THERMAL:1OOK 0HM,10%,4MW/DEG C

RES. ,THERMAL:1OOK 0HN,10%,4NW/DEG C

CKT BOARII ASSY:AC-GND-DC CKT BOARD ASSY:AC-GNO-DC CKT BOARD ASSY:MAIN CKT BOARD ABSY:MAIN CKT BOARD ASSY:MAIN

CKT BOARD ASSY:NAIN CKT BOARD ASSY:+AC-GND-DC CKT BOARD ASSY:+AC-GND-DC CKT BOARO ASSY:BANDWIDTH CKT BOARD ASSY:MAIN

CKT BOARD ASSY:NAIN CKT BOAR13 ASSY:MAIN

CKT

BOARD ASSY:BANDWIDTH RES. ,VAR, NONWIR:2K OHM,lO%, O.5OW P.ES. ,VAR, NONWIR:PNL,2X1OK OHM, O.5W

RSS. ,VAR, NONWIR:PNL,2X1OK OHM, O.5W

SENICOND DNICE:ZENER, O.5W,9V,5% SEMICONO DEVICE: ZENER,1W,15V,5% SZMICOND DKVICE:ZENER, O.4W,9.1V,5% SE241COW0 DEvICE: ZENER, O.4W,12V,5%

SEWiICX3ND DEVICE: ZENER,”0.4W,6 .2V,5% SZMICOND DEVICE: ZENER, O.5W,9V,5$

SEMICOND DEVICE: ZENSR, O.4W,6.2V,5%

Mfr

Mfr Part Number

01121

CB1545

01121

CB7535

01121

CB7535

01121

CB1545

01121

CB7535

01121

CB7535

01121

CB1235

75042

CEATO-3742F

01121

CB7535

01121

CB1545

01121

CB5135

75042

CEATO-2051F

01121

CB2225

01121

CB1045

01121

BB2235

01121

CB2235

01121

BB2035

01121

CB2035

50157

JP-51J2

50157

JP-51J2

80009 670-1014-00 80009 670-1014-01 80009 670-1014-03

80009 670-1014-04

80009 670-1013-00 80009 670-1014-00BOIOIOO B029999

80009 670-1014-03

80009 670-1014-04 80009 670-1013-00 01121 WA1G040S202UA 12697 381-cM40098

12697 D381S-CM40098

04713 SZ50646 99942 1N5567B 81483 1N960B 04713 1N963B 04713 1N753A 04713 5z50646 04713 1N753A

~RepIaCe~Ie only U~der circuit Board Assembly 670-1050-XX. 2See ~ec~a~cal parts

3~eP~ace~le

4FUrni~hed as a unit

OrjIY under ~ircuit Board Aesembly’ 670-1051-xx.

LiSt

with

for

replacement parts.

R535.

5FUrn~~~ed as a unit with R430.

6-9

SECTION 7

TM 11-6625-2749-14&P

7-1

11-6625-2749-14&P

7-3

TM 11-6625-2749-14&P

7-5

TM 11-6625-2749-14&P

7-7

TM 11-6625-2749-14&P

7-9

TM 11-6625-2749-14&P

7-11

TM 11-6625-2749-14&P

7-13

TM 11-6625-2749-14&P

7-15

REPLACEABLE

MECHANICAL PARTS

TM 11-6625-2749-14&P

PARTS ORDERING INFORMATION

Replacement

Tektronix, inc. Field Office or representative.

Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available, and to give you the benefit of the latest circuit improvements developed in our engineering department.

impotiant, when ordering parts, to include the following information in your order: Part number, instrument type or number, serial number, and modification number if applicable.

If a

part you have ordered has been replaced with improved part, your local Tektronix, Inc. Field Office or representative will contact you concerning any change in part number.

parts

are available from or through your local

It is

therefore

new or

SPECIAL NOTES AND SYMBOLS

Xcxxl

Oox

Part first added at ‘this serial number

Part removed after this serial number

FIGURE AND INDEX NUMBERS

Items in this section are referenced by figure and

numbers to the illustrations.

index

INDENTATION SYSTEM

This mechanical parts list is indented to indicate item relationships. Following is an example of the indentation system used in the description column.

12345

Assembly andlor Component Attaching parts for Assembly andlor Component

----- -.

Detai/ Part of Assemb/y andlor Component

Attaching parts for Detai/ Part

------

Parts of Detail Part

Aftaching parts for Parts of Detai/ Part

---.- --

Attaching Parts always appear in the same indentation as

the item it mounts, while the detail parts are indented to the right,

Indented items are part of, and included with, the next higher

indentation. The separation symbol ---’ --- indicates the end of attaching parts.

Attaching parta must be purchaaed separately, unless otherwise specified.

Name

Description

ITEM NAME

In the Parts List, an Item Name is separated from the

description by Name may sometimes appear as incomplete. For further Item Name identification, the U.S. Federal Cataloging Handbook H6-1 can be utilized where possible.

colon (:). Because of space limitations, an Item

# ACTF4 ADPTR ALIGN M_ ASSEM ASSV ATTEN AWG BD EIRKT Ems Smz EK5WG CAB CAP CER CHAS cm CXW”4P ccmN CXW CPLG CRT

DE(3

INCH NUMBER SIZE

ACTUATOR

ADAPTER

ALIGNMENT

ALUMINUM

ASSEMBLED ASSEMBLY ATTENUATOR AMERICAN WIRE GAGE BOARD EW?ACX.ET BRASS BRONZE BUSHING CABINET CAPACITOR CERAMIC CHASSIS CIRCUIT COMPOSITION

CONNECTOR COVER

COUPLING

CATHODE

DEGREE DRAWER

F MARCH

1976

RAY TI.JEIE

ELCTRN H-EC

ELCTLT

mm Em EC2PT

EXT

FIL FLEX FLH FLTR FR FSTNR FT

FXD GSKT HDL HEx

HEX 1-1o

HEX

SC)c

HLCPS HLEXT Hv

Ic ID

IDENT

[MPLR

ABBREVIATIONS

ELECTRON ELECTRICAL ELECTROLYTIC ELEMENT ELECTRICAL PARTS LIST EQUIPMENT EXTERNAL FILLKSTER t+EAO FLEXIBLE FLAT HEAO FILTER FRAME or FRONT FASTENER FOOT FIXED GASKET HANDLE HEXAGON HEXAGONAL HEAO HEXAGONAL SOCKET HELlCAL COMPRESSION HELlCAL EXTENSION HIGH VOLTAGE INTEGRATE INSIDE DIAMETER IDENTIFICATION IMPELLER

CIRCUIT

IN INCAND INCANDESCENT INSUL

INTL LPHLOR MACH MECt-1 MTCi

NIP

NON WIRE NOT WIRE WOUNO

OBO

Owi

PLSTC

PNH

PWR

RCPT

RES

RGO

RI-F

RTNR

SCH

SCOPE

SCR

INCH INSULATOR

INTERNAL LAMPHOLDER MACHINE MECHANICAL MOUNTING NIPPLE

ORDER BY DESCRIPTION OUTSIDE DIAMETER OVAL HEAO PHOSPHOR BRONZE

BRZ

PLAIN or PLATE PLASTIC PART NUMBER PAN HEAD POWER

RECEPTACLE RESISTOR RIGID

RELIEF

RETAINER

SOCKET HEAD

OSCILLOSCOPE

SCREW

SECT SEMICOND SEMICONDUCTOR SHLD SHLOR SKT SL SLFLKG SLVG SPR SQ SST STL Sw

TERM THO THK TNSN TPG TRH v VAR Vil WSHR XFMR XSTR

SINGLE ENO SECTION

DHIELU SHOULDERED SOCKET SLIDE SELF-LOCKING SLEEVING SPRING SQUARE STAINLESS STEEL STEEL SWITCH TUBE TERMINAL THREAD THICK TENSION TAPPING TRUSS HEAD VOLTAGE VARIABLE WITH WASHER TRANSFORMER TRANSISTOR

8-1

TM 11-6625-2749-14&P

CROSS INDEX–MFR. CODE NUMBER TO MANUFACTURER

Mfr. Code Manufacturer

000BK 00779 13257 22526 24931 55210 70276 71785 73743 74445 76854 78189

79136 79807 80009

83385 86928 87308

89663 93907 95987 99934

STAUFFER SUPPLY AMP, INC. AMERACE, LTD. BERG ELECTRONICS, INC.

SPECIALTY CONNECTOR CO. , INC.

GETTIG ENG. AND MFG. COMPANY ALLEN MFG. CO.

TRW, CINCH CONNECTORS

FISCHER SPECIAL MFG. CO.

HOLO-KROME CO.

OAK INDUSTRIES, INC. , SWITCH DIV.

ILLINOIS TOOL WORKS, INC.

SHAKEPROOF DIVISION WALDES, KOHINOOR, INC. WROUGHT WASHER MFG. CO.

TEKTRONIX, INC.

CENTRAL SCREW CO.

SEASTROM MFG. COMPANY, INC. N. L.

INDUSTRIES, INC. , SOUTHERN SCREW DIV. REESE,

CAMCAR SCREW AND MFG. CO. WECKESSER CO. , INC.

RENBIV!NDT INC.

RAMSEY, INC.

Address

105 SE TAYLOR P O

BOX 3608 10 ESNA PARK DRIVE YOUK EXPRESSWAY 3560 MADISON AVE. PO BOX

85,

P. O. 1501 MORSE AVENUE 446 MORGAN 31 BROOK ST. WEST S.

MAIN ST.

ST. CHARLES ROAD 47-16 AUSTEL PLACE 2100

S. O

P O BOX 500 2530 C!ZSSCENT DR. 701 SONORA AVENUE

P. O. 71 MURRAY STREET 600 18TH AVE. 4444 WEST IRVING PARK RD. 6

PARMELEE

OFF ROUTE

DRAWER 570

ST.

BAY

ST.

BOX 1360

STPJ3ET

City, State, Zip

PORTLAND, OR 97214 HARRISBURG, PA 17105 MARIWAM, ONTARIO, CANADA NEW CUMBERLAND, PA 17070 INDIANAPOLIS, IN 46227 SPRING MILLS, PA 16875 HARTFORD, CT 06101 ELK GROVE VILLAGE, IL 60007 CINCINNATI, OH 45206 HARTFORD, CT 06110 CRYSTAL LAKE, IL 60014

ELGIN , LONG ISLAND CITY, NY 11101 MILWAUKEE, WI 53207 BEAVERTON, OR 97077 BROADVIEW, IL 60153 GLENDALE, CA 91201

STATESVILLE, NC 28677 NEW YORK, NY 10007 ROCi@ORD, IL 61101 CHICAGO, IL 60641 BOSTON, MA 02118

IL 60120

8-2

REV.

SEPT. 1978

Fig. Index No.

1-1

-2

-3

-4

-5

-6

-7

-$3

-9

-10

-11

-12

-13

-14

-15

-16

-17

-M3

-19

-20

-21

-22

-23

-24

-25

-26

-27

-28

-29

-30

-31

-32

-33

-34

-35

-36

-37

-38

-39

-40

-41

Tektronix Part No.

366-1059-00 366-1077-00 213-0153-00

----- -----

210-0046-00 210-0940-00 210-0583-00

366-0392-02

----- -----

213-0020-00

366-1166-00 213-0153-00

366-1057-00

213-0153-00

366-0379-00 213-0153-00

366-0379-00 213-0153-00 366-1084-00 213-0725-00

366-1101-00

213-0153-00

----- -----

21O-O583+3O 210-0046-00

426-0474-00

211-0111-00 210-0001-00

361-0280-00

----- -----

210-05S.3-00

210-0046-00

210-0940-00

386-1095-00

333-1106-00

306-1447-07

348-0031-00

358-0216-00

358-0378-00 129-0053-00

200-0103-00

355-0507-00

210-0046-00

210-0583-00

131-0679-00

366-1058-07

214-1095-00

105-0076-02 214-12$0-00

Serial/ModelNo. Eff Dscont

Qty 12345

PUSH BUTTON:GRAY

KNOB : GRAY

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

RESIS’N3R,VAR: (SEE R430,S622 EPL)

WASHER,LOCK:INTL,0.26

1 1

WASHER,FLAT:O.25

NUT, PLAIN, HEX. :0.25-32 X 0.312 INCH, BPS

KNOB : GRAY

RILSISTOR,VAR: (SEE R258 EPL)

SETSCRXW:6-32 X 0.125 INCH,HEX.SOC STL

KNOB : RED

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

KNOB : GRAY

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

KNOB:GRAY,MODE

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

KNOB:GRAY,MODE

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

KNOB : G~Y

SETSCREW:3-48 X 0.095 INCH,HEX SOC STL

KNOB : GRAY

SETSCREW:5-40 X 0.125 INCH,HEX SOC STL

RBSIS’IQR,VAR:(SEE R270 EPL)

NUT,PLAIN,HEX. :0.25-32 X 0.312 INCH,BRS

WASHER, LOCK: INTL,0.26 ID X 0.40” OD, STL

MOUNT,RESILIENT:S

SCREW,MACHINE:2-56

WASHER,LCCK:INTL,0.092

SPACER, SLEEVE:0.75 INCH LONG

RESISTOR,VAR: (SEE R265 EPL)

NUT,PLAIN,HEX. :0.25-32 X 0.312 INCH,BPS

WASHER,LOCK:INTL,0.26 WABHER,FLAT:0.25

PLATE,RES.,MTG:

1 1

PANEL,FRONT:

SUBPANEL,FRONT :

GROMNET,PmSTIC:O.156

BUSHING, PLASTIC:0.257 ID X 0.412 INCH OD

BUSHING, SLEEVE: PRESS MOUNT

POST,BBG,ELEC :UNINSULATED

NuT, PLAIN, KNURL: O.25-28 X 0.375” OD,BRASS STUD,SHOULDERED:BINDING

WASHER, LOCK: INTL,0.26 ID X 0.40” OD, STL

NUT, PHiIN, HEX. :0.25-32 X 0.312 INCH,BRS

CONNECTOR,RCPT, :BNC W/HARDWARE

KNOB : LATCH

PIN, SPG, SPLIT:0.094 OD X 0.187 INCH LONG

FC3L BAR,LATCH:PLUG-IN

1 1

SPRING,HLCPS:0.14

Name&Description

(ATTACHING pmTs)

ID X

0.375 INCH OD,STL

----

(ATTACHING PARTs)

---

(ATTACHING PARTs)

----

SHAPE

(AmAcHING pARTs)

1.0 INCH,PNH STL

ID X

----

(ATTACHING PARTS)

ID X

0.375 INCH OD,STL

---

INCH DIA

POST

(ATTACHING PARTS)

---

(ATTACHING PmTs)

---UNIT

OD X

1.126’’L,O.16’’DIA W

0.40” OD,STL

*___

0.18’’OD,STL

0.40” OD,STL

*---

*___

TM 11-6625-2749-14&P

Mfr

Code Mfr Part Number

24931

366-1059-00 366-1077-00

OBD

1214 -05-00 -0541C

OBD

2x20224-402

366-0392-02

OBD

366-1166-00 OBD

366-1057-00

OBD

366-0379-00

OBD

366-0379-00

OBD

366-1084-00

OBD

366-1101-00

OBD

2x20224-402 1214 -05-00 -0541C

426-0474-00

OBD

1202 -00-00 -0541C

3-5152-340

2x20224-402 1214-05-00-0541C

OBD

15528-015 333-1106-00 386-1447-07 348-0031-00 358-0216-00 358-0378-00 129-0053-00 200-0103-00 355-0507-00

1214-05-00-0541C 2x20224-402

28JR168-1 366-1058-07

52-022-094-0187

105-0076-02 214-1280-00

80009 74445

78189

79807

73743

80009

70276

80009 74445 80009 74445 80009 74445

74445 80009 74445 80009 74445

73743 78189

80009

83385 78189

76854

73743 78189 79807

76854 80009

80009 80009 80009 80009 80009 80009

78189 73743

80009

13257

80009 80009

FUX.?. F SEPT. 1978

8-3

TM 11-6625-2749-14&P

Fig,

Index No.

1-42

Tektronix Serial/Model Part No.

348-0157-00 348-0235-00

-43

670-1050-00 670-1050-01

-44

131-0589-00

211-0156-00

-45

-46

670-1051-00 670-1051-01

-47

131-0589-00

-48

211-0156-00

-49

352-0068-00

-50

131-0664-00

-51

211-0008-00

-52

210-0586-00

-53

131-0664-00

–54

211-0008-00

-55

210-0586-00

-56

378-0600-00

-57

352-0067-00

211-0018-00

-58

-59

210-0406-00

214-1054-00

-60

-61

105-0075-00 344-0162-00

-62 344-0211-00

-63

344-0161-00 344-0210-00 210-0201-00

-64

211-0101-00

-65

-66

210-0586-00

214-1061-00

-67

337-1243-00

-68

-69

426-0499-03

211-0101-00

-70

210-0586-00

-71

-72

213-0192-00

-73

426-0505-03

211-0101-00

-74 210-0586-00

-75

-76

213-0192-00

-77

386-1402-00

-78

213-0192-00

-79

361-0326-00

-80

337-1145-00 337-1145-01

Eff Dscont

BO1O1OO BO1O18O BO1O181 BO1O1OO B059999 B060000

BO1O1OO B059999 B060000

BO1O1OO B050549 B050550 BO1O1OO B050549 B050550

BO1O1OO B069999 B070000

No.

Qty 12345

SHLD GSKT,ELEC: 80009

SHLD GSKT,ELEC;4.734 INCH LONG 80009

CKT BOARD ASSY:AC GND DC 80009

. TERM,PIN:0.46 L X 0.025 SQ.PH BRZ GL 22526

SCREW,MACHINE:l-72

CKT BOARD ASSY:+AC GND DC

CKT BOARD ASSY:+AC GND DC 80009

TERM, PIN: O.46 L X 0.025 SQ. PH BRZ GL 22526

SCREW,MACHINE:1-72

HOLDER,TEST PRO:PLASTIC

CONTACT , ELEC :

SCREW,MACHINE :4-40 X 0.25 INCH,PNH STL

NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL

CONTACT,ELEC :

SCREW,MACHINE :4-40 X 0.25 INCH,PNH STL

NUT, PLAIN, EXT W:4-40 X 0.25 INCH, STL

LENS, LIGHT: INDICATOR,2.428 INCH LONG LAMPHOLDER:

SCPJ?W,MACHINE:4-40 X 0.875 PNH,STL

NUT, PLAIN, HEX. :4-40 X 0.188 INCH, BRS

SPRING,FLAT:0.825

PAWL:0.475 X 0.21 X 0.184 INCH,PLSTC

CLIP,SPR TNSN:BOTTOM,PLASTIC

CLIP, SPR TNSN:TOP, PLASTIC

CLIP,SPR TNSN:

TERMINAL,LUG:SE #4

SCREW,MACHINE:4-40 NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL

SPRING,GROUND :FLAT

SHIELD,ELEC:4.25

FR SECT,PLUG-IN:BOTTOM

SCREW,MACHINE:4-40

NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL

SCR,TPG,THD FOR:6-32 X 0.50 INCH,PNH STL

FR SECT,PLUG-IN:TOP

SCREW,MACHINE:4-40

NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL

SCR,TPG,THD FOR:6-32 X 0.50 INCH,PNH STL

PANEL,REAR:

SCR,TPG,THD FOR:6-32 X 0.50 INCH,PNH STL

SPACER, SLEEVE:0.18 ID X 0.25 OD X O.1O”L

SHIELD,ELEC:LEFT

Name&Description

(ATTACHING pARTs FOR CKT

X 0.25’’,82

---

(ATTACHING PARTS FOR CKT

X 0.25’’,82

---

(ATTAcHING pARTs)

-_*---

(ATTACHING PARTS)

---

(ATTAcHING pARTs)

---

O.322,SST

(ATTACHING PARTS FOR EACH)

0.25” 100 DEG,FLH STL

---

1.5’’,PLSTC,W/ADH

(ATTACHING pARTs)

0.25” 100 DEG,FLH STL

---

(ATTACHING PARTs)

0.25” 100 DEG,FLH STL

---

(ATTAcHING pARTs)

---

SIDE SIDE

DEG,FLH STL

*___

DEG,FLH STL

*---

*___

*---

*___

*---

Mfr

Code Mfr Part Number

348-0157-00 348-0235-00 670-1050-00 670-1050-01

93907

47350

OBD

670-1051-00 670-1051-01

47350

OBD

352-0068-00 131-0664-00

OBD

211-041800-00

131-0664-00

OBD

211-041800-00

378-0600-00 352-0067-00

OBD

2x12161-402

214-1054-00 105-0075-00 344-0162-00 344-0211-00 344-0161-00 344-0210-00

A373-157-2

OBD 211-041800-00

214-1061-00 337-1243-00

426-0499-03

OBD

211-041800-00

OBD

426-0505-03

OBD

211-041800-00

OBD

386-1402-00

OBD

361-0326-00

337-1145-00 337-1145-01

BD)

80009

BD)

93907

80009 80009

83385 78189

80009

83385 78189

80009 80009

83385 73743

80009 80009 80009 80009 80009 BOO09 86928

83385 78189

80009 80009 80009

83385 781B9 87308

80009

83385 78189 87308

80009

87308 80009

80009 80009

8-4

RJ3V. C SEPT. 1978

Fig, &

index

No.

1-81

-!32

-83

Tektronix Serial/Model

Part No.

337-1146-00 BO1O1OO B069999 337-1146-01 B070000 348-0115-00 337-1045-00

Eff

No.

Dscont

Name

Qty 12345

1 SHIELD, ELEC:RIGHT SIDE 1

SHIELU,ELEC:RIGHT

GROMMET, PLASTIC: U-SHP,0.548 xO.462 INCH

1 SHIELD, ELEC:INPUT

SIDE

Description

TM 11-6625-2749-14&P

Mfr Code Mfr Part Number

80009 337-1146-00 80009 337-1146-01 80009 348-0115-00 80009 337-1045-00

REV. J SEPT. 1970

8-5

ll-6625-2749-14&P

Fig.

& Index No,

2-1

Tektronix Serial/Model

Part

No.

384-0255-00

-2

384-0306-00

-3

384-0444-00 351-0159-00

-4

213-0088-00

-5

-6

131-0792-02

-7

131-0622-00

-8

352-0198-00

-9

131-0740-00

-lo

131-0755-00

-11

352-0169-00 179-1407-00

-12

-13

131-0707-00

-14

131-0512-00

352-0136-00

-15

211-0008-00

-16 210-0586–00

-17

200-0902-00

-18

-19

211-0008-00

-20

200-0687-01

----- -----

-21

-22

407-0554-00

-23

210-0046-00

-24

210-0583-00

-25

376-0029-00 213-0075-00

-26

670-1013-00

-27

211-0155-00

-28

211-1140-00

-29

351-0155-00

-30

131-0608-00

-31

136-0263-01 BO1O1OO BO1O18O 136-0263-03 BO1O181 B094559 136-0263-04 B094560

-32

136-0183-00

-33

136-0220-00

-34

131-0604-00

-35

131-0840-00 XBO1O181 105-0415-00

-36

211-0116-00

200-0996-00

-37

211-0022-00

-38

-39

210-0001-00

-40

407-0714-00

-41

214-1126-021

-42

214-1127-001

-43

401-0058-00

-44

354-0219-00

Eff Dscont

No.

Qty

12345

EXTENSION SHAFT:0.08/0.125 DIA X 5.594” L

EXTENSION SHAFT:9.5 INCH LONG

EXTENSION SHAFT:ll.062 INCH LONG

GUIDE,SHAFT:FOR 0.125 OD SHAFT,PLASTIC

SCR,TPG,THD CTG:4-24 X 0.25 INCH,PNH STL

CONTACT, ELEC:0.577’’L,18 -20 AWG WIRE

CONTACT, ELEC:0.577’’L,28 -32 AWG WIRS

CONN BODY,PL,EL:2 WIRE BLACK

CONTACT,ELEC:O.315

CONTACT,ELEC:0.315

CONN BODY,PL,EL:2 WIRE BLACK

WIRING HARNESS, :MAIN

CONNECTOR, TERM. :0.48” L,22-26AwG WIRE

CONTACT,ELEC:0.315

E’USEHOLDER : TEFLON

SCREW,MACHINE:4-40

NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL

COVER,CKT CARD:PLASTIC

SCREW,MACHINE:4-40

COV, TRANSISTOR:0.438 DIA X 0.47 INCH H

RESISTOR,VAR: (SEE R540 EPL)

BRKT,COMP MTG:

WASHER,LOCK:INTL,0.26

NUT, PLAIN, HEX. :0.25-32 X 0.312 INCH, BRS

CPLG, SHAFT, RGD:0.128 ID X 0.312 OD X 0.5”L

SETSCREW:4-40 X 0.094 INCH,HEX SOC STL

. .

CKT BOARD ASSY:BANDWIDTH

SCREW,EXT,RI,V B:4-40 X 0.375 INCH,SST

SPRING,HLCPS :0.251 OD X 0.375” L,SST WIRE

INSULATOR,STDF :CONNECTOR,DELRIN

TERMINAL,PIN:0.365

SOCKET, PIN TERM;

SOCKET, PIN TERM: FOR 0.025 INCH SQUARE PIN

SOCKET,PLUG-IN:3 PIN,ROUND

SOCKET,PLUG-IN:3

CONTACT, ELEC:CKT BD SW, SPR, CU BE

CONTACT,ELEC :GROUNDING

DRUM ASSY, CAM S: LOW FREQUENCY

SCR,ASSEM WSHR:4-40 X 0.312 INCH,PNH BRS

COVER,CAM SW:

SCREW,MACHINE :2-56 X 0.188 INCH,PNH STL

WASHER,LOCK:INTL,0.092

BRACKET,CAM SW:

1 2

SPRING,FLAT:RED COLORED

ROLLER, DETENT:0.125 DIA X 0.125 INCH L BEARING, CAM SW: FRONT

RING,RETAINING:FOR

Name &

(ATTACHING pARTs)

INCH LONG,18 TO 20 AWG INCH LONG,28 TO

“

(ATTAcHING PARTs)

(ATTACHING pARTS)

(ATTACHING pARTs)

L X

??OR

PIN,sQuARE

(ATTAcHING pARTS)

(ATTACHING pARTS)

(ATTACHING PARTS)

Description

*___

---

L,22-26 AWG WIRE

0.25 INCH,PNH STL

--- *--

0.25 INCH,PNH STL

---

*___

ID X

0.40” OD,STL

---

*___

---

0.25 PH,BRZ,GOLD PL

0.025 INCH SQUAP3 PIN

*---

---

ID X

*___

---

0.25 INCH SHAFT

-__*

---

AWG

0.18’’OD,STL

Mfr Code

Mfr Part Number

80009 80009

83385

22526 22526 80009 00779 00779 80009

80009

22526 00779 80009

83385 7B189

80009

83385 OBD

80009 200-0687-01

80009 78189 73743

80009 000BK 80009

80009 80009

80009 22526 00779 00779 22526 80009 71785 80009 80009 80009

83385 OBD

80009 200-0996-00

83385 78189

80009 BOO09 80009 80009

79136

384-0255-00 384-0306-00

384-0444-00 351-0159-00

OBD

46221 46241

352-0198-00 61508-2 61615-1 352-0169-00

179-1407-00

75691-005 61507-1 352-0136-00

OBD

211-041800-00

200-0902-00

407-0554-00

1214 -05-00 -0541C 2x20224-402

376-0029-00

OBD

670-1013-00

211-0155-00 211-1140-00

351-0155-00

47357 85861-2 86250-2

48059

136-0183-00

133-23-11-034

131-0604-00

131-0840-00

105-0415-00

OBD

1202 -00-00 -0541C

407-0714-00

214-1126-02

214-1127-00

401-0058-00

5103 -25-MD-R

lRePlace only with part bearing the same color as the original part in YOU instr~ent.

8-6

REV. H SEPT. 1978

Fig. &

Index

No.

2-45

-46

-47

-48

-49

-50

-51

-52

-53

-54

-55

-56

-57

-5$3

-59

-60

-61

-62

-63

-6.4

-65

-66

-67

-68

-69

-70

-71

-72

-73

-74

-75

-76

-77

-78

-79

-80

-81

-82

-83

-84

Tektronix Serial/fvlodel

Part

No.

105-0112-00 213-0 c375-00 210-0405-00 210-0406-00 401-0061-00 105-0466-00

211-0116-00

200-0995-00

211-0022-00 21O-OOOI-OC?

407-0714-00 XBO1O181 214-1126-011 214-1126-021 214-3.127-00 401-0058-00

354-0219-00

105-0109-00 213-0075-00 210-0405-00 210-0406-00

401-0061-00

----- -----

210-0583-00 210-0046-00

407-0553-00 670-1014-00 BO1O1OO B029999 670-1014-01 B030000 B059999 670-1014-03 B060000 B069999 670-1014-04 B070000 B079999 6’70-1014-05 BO130000 B115479 670-1014-06 B115480

211-0116-00 BO1O1OO B099999 211-0513-00 B1OOOOO 210-05$36-00 BO1O1OO B099999 210-0457-00 B1OOOOO 210-0863-00 XB1OOOOO 343-0002-00 KBJ.00000 B115479 343-0003-00 5115480

23.0-041.%-00 210-0840-00

384-0448-00 376-0091-00 213-0020-00 XS020160 131-0590-00 342-0050-00 xB050000 351-0155-00 136-0235-00 344-0154-00 136-0183-00 131-0566-00 337-1266-02 214-0579-00 136-0235-01

Eff Dscont

No.

Qty

12345

. . DRUM,CAN SW: 2 1 2 1 1

2 2

1 1

1 2 1 2 1 1

1 1

1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1

1 1

4 18 15 22

SETSCREW:4-40 X 0.094 INCH,HEX Soil! STL

. .

NWT, PLAIN, HEX. :2-56 X 0.188 INCH, BRS

. . . .

NUT, PLAIN, HEX. :4-40 X 0.188 INCH, BRS . . BEARING,CAN SW:REAR . DRON ASSY,CAN S:LOW FREQENCY

SCR,ASSSM WSHR:4-40 X 0.312 INCH,PNH BPS

. .

COVSR,CAN SW:

. .

SCREW,NACHINS:2-56

WASHER,LOCK:INTL,0.092

. .

13RACKET,CAM SW:

SPRING,FLAT:GREEN

. .

SPRING,FLAT:RED COLORED

. .

IVXLER,DETENT:O.125

. .

BEARING,CAN SW:FRONT

. .

RING,RETAINING:FOR

DRUM, CAN SW:

. .

SETSCREW:4-40 X 0.094 INCH, HEX SOC STL

. .

NOT,PLAIN,HEX. :2-56 x 0.188..INCH,BRS

NUT,PLAIN,HEX. :4-40 X 0.188 INCH,BRS

. .

BEARING, CAN SW:REAR

. .

RESISTOR,VAR:(SEE

NUT,PLAIN,HEX. :0.25-32 X 0.312 INCH,BRS

WASHER, LOCK: INTL,0.26 ID X 0.40” OD, STL

BRKT,CNPNT MTG: CKT BOARD ASSY:NAIN CKT BOARD ASSY:MAIN CKT BOARD AESY:NAIN CKT BOARD ASSY:NAIN CKT BOARD ASSY:NAIN CKT BOARD ASSY:NAIN

SCR,ASSEM WSHR:4-40 X 0.312 INCH,PNB BRS SCRJ3W,MACHINE:6-32 X 0.625 INCH,PNH STL NUT,PLAIN,EXT W:4-40 X 0.25 INCH,STL NUT,PLAIN,EXT W:6-32 X 0.312 INCB,STL WSHR,LOOP CLAMP:FOR 0.50” WIDE CLANP,STL CLAMP,L&3P:0.188 CLAMP,LOQP:0.25 INCH DIA NUT,PLAIN,HEX. :0.375-32 X 0.50 INCH,STL WASHER,FLAT:0.39

SHAFT,EXTENSION:ll.125

. .

CPLG,SHAFT,FLEX :

SETSCPEW:6-32 X 0.125 INCH,HEX.SCC STL

CONTACT,ELEC:0.71 INSULATOR , STDF :

INSULATOR, STDF : CONNECTOR , DELRIN

. .

SOCKET,PLUG-IN:6

CLIP, ELECTRKAL:FOR SOCKET,PLUG-IN:3

. .

LINK,

TERJ4.

SHIELD,ELEC:

TER14.

. .

,TEST PT:BRS CD PL

SOCKST,PLUG-IN:6

Name &

(ATTACHING PARTs)

(ATTACHING PARTS)

(ATTACHING pARTs)

R535,S535 EPL)

(ATTACHING pARTs)

(ATTACHING PARTS)

INCH DIA

ID X

CONTACT,ROUND

PIN,ROUND

CONNE:O.086 DIA X 2.375 INCH L

CONTACT,ROUND

Description

----

0.188 INCH,PNH STL

ID X

*___

---

COLORED

DIA X 0.125 INCH L

0.25 INCH SHAFT *

----

*___

---

0.562 INCH OD,STL

----

INCH LONG,PLASTIC

INCH LONG

0.25 INCH DIA FUSE

0.18’’OD,STL

TM 11-6625-2749-14&P

Mfr

Code

Mfr Part Number

000BK 73743 73743 80009 80009

83385

80009

83385 78189

80009 80009

80009 80009 80009

79136

80009 000BK 73743 73743

80009

73743 78189

80009 80009 80009 80009 80009 80009 80009

83385 83385 78189 83385

95987 95987 95987 73743

89663

80009

99934 70276 22526

80009

71785 80009 80009

55210 80009

80009

71785

105-0112-00

OBD

2x12157-402 2x12161-402 401-0061-00 105-0466-00

OBD

200-0995-00

OBD

1202-00-00-0541C

407-0714-00 214-1126-01 214-1126-02 214-1127-00 401-0058-00

5103-25-ND-R

105-0109-00

OBD

2X12157-402 2x12161-402

401-0061-00

2x20224-402 1214 -05-00-0541C

407-0553-00

670-1014-00 670-1014-01 670-1014-03 670-1014-04 670-1014-05 670-1014-06

OBD OBD

211-041800-00 OBD C191

3-l6-6B

1-4 6R

3145-402

644R

384-0448-00 A-201-165 OBD

47351

342-0050-00

351-0155-00

133-96-12-062

344-0154-00

136-0183-00 L-2007-1

337-1266-02

214-0579-00

133-96-92-067

Replace only with

SEPT. 1978

part bearing the same color as the original part in your instrument.

8-7

SECTION!

TM 11-6625-2749-14&P

BB2035

BB2235

BB2435

m3%l15

c.Bm35

cBlmft5

Cmncm

C.BIJ235

mw+5

CBM355

PART

NUMBER

FSCM

olll12L

o111121

ol&211

o1111211

0111121

olJ1211

03321

OU21

o111121

olJJ21

on2i

PART NUMBER

CROSS REFERENCE INDEX

N4TIONAL

STOCK NUMBER

5905-00-958-3830

5905-00+03-8837

5905-00-9611-7730

5905-00+07-0085

5905+0-234-4374

5905-00-102-5294

5905-00-909-3885

5905-00-959-1202

5905-00-XI.16-8554

5905-00-989-7%3

5905-00-904-5696

5905-00-800-8068

– NATIONAL STOCK NUMBER

PART NUMBER

CEATO-l12411F

CEATO-1272F

CEATO-1500F

CEATO-1501F

CEATO-1541F

CEATO-20ROF

CEATO-2000F

CEATO-2001F

CEATO-20511F

CEATO-2261F

CEATO-2491F

CEATO-2493F

FSCM

75042

NATIONAL

STOCK

NUMBER

5905-00-153-4435

5905-00-105-9724

5905-00-937-0576

5905-00-I.109-9848

5905-OIJ-026-5084

5905-00-1177-7172

5905-00-998-L796

5905-00-922-9920

5905-oo-724-5n7

5905-00-102-60011

5905-00-023-64%

5905-00-051r1879

CB2025

CB2W5

CB2225

CB3635

cB3&5

CB3935

CB4335

C134735

cB51!05

CB5%25

CEHJ35

CB%25

CB7535

CEATCI-%O02F

CEATO-MX)31=

CEAT&lOED

CEATO-10112F

olJJ211

0XIJ21

o111211

olJL21.1

milJ211

olll!211

ollL21

Ollxzl.r

0XIJ21

olil12%

Ollla

01J121

OIIKI

75042

5905-00-102-5289

5905-00-136-71103

5905-00-909-3%0

5905-00-L36-8430

5905-ocF141-07411

5905-00-907-QL8

5905-00-122-0004

5905-00-960-01126

5905-00-909-3834

5905-oo-9111.r3754

5905-00-136-3890

5905-0@909-3862

5905-00-9116-7268

5905-00-904-4409

5905-00-484-7475

5905-00-%05-9709

5905-00-893-11242

CEATO-3010F

CEATO-3012F

CEATO-3320F

CEATO-3652F

CEATO-3742F

CEAT040211F

CEATD-4530F

CEATO-4990F

CEATO-4991F

CEATO-5622F

CEATO-8060F

EB5625

SE365

SS22650

SV251JlJ

SZ50646

75042

o1111211

03508

07263

olJ1211

047113

5905-00-078-lJ549

5905-01-017-8307

5905-00-021r6496

5905-00-4119-2676

5905-00-441J-7812

5905-00-922-9923

5905-00+33-7389

5905-00-922-9924

5905-00-922-9925

5905-00-997-9579

5905-00-233-5377

5905-00-L211-9UI0

5961rO0-222-611~0

5961-00-488-9927

5905-00-41A-11101

596%-00-237-2353

CEATO-ldO%F

75042

5905-00-994-8457

WAJJG040S202UA

olA21

5905-00-400-35431

9-1

TM 11-6625-2749-14&P

SECTION

PART NUMBER NATIONAL STOCK NUMBER

CROSS REFERENCE INDEX

PART NUMBER

IN4152

1N5567B

IN963B

3J214-05-00-0541C

129–0053–00

131-0566–00

131r0589-00

1131-0590-00

131–0604-00

131–0608–00

131–0622–00

131–0679–00

l!31r0707-oo

l131r0792-00

NATIONAL

STOCK

FSCM

07910

99942

04713

78189

80009

NUMBER

5961–00–899–8924

5963–00-254–1621

5961–00-998–3666

53110-00-193-6731

5940–00-835–2060

5940–00-242–0676

5999-00-275-0213

5999–00–551–9434

5999–00–IJ73-9923

5999-00-551-9433

5999-01-022–66JJ6

5935-00-236-7554

5999–00-396–6331

5999–01r023–1578

PART NUMBER

152–0185–00

152–02112-00

152-0280+0

152-0323–00

L52–0405–00

L894–5

189-509-5

189–6–5

2N5308

2R5859

2X12161402

2X20224-402

200–0103–00

210–0046–00

FSCM

80009

74970

03508

04713

73743

80009

NATIONAL

STOCK

NUMBER

5961–00-936-7604

5961-00-237–2353

5961-00436-2890

5961–00-222-6390

5961-00-254-162%

5910–00–958-3153

5910-00-247-8600

5910–00–834–493~

5961–00–146–8295

5961–00+48–671J7

53110-004074600

53>0–00–158-5262

5999-00-914–3308

53L0–00-841r8LlJ7

lJ33-23-111-034

133–96–12-062

li36-0183-00

L36–0220–00

136–0235–00

136–0263–03

150–0046–00

150–0048–01

l150-oo57-oL

150D396X9010B2

150D475X9035B2

151-0219-00

151–0228-00

151-0260–00

151–0261–00

151-1027–00

7L785

80009

56289

80009

5935-00-067-73111J

5935–00-814–2209

5935-00-938-4734

5935–00–067–73111

5935–00-814–2209

5999-00-394-0381

6240–00-933-5822

6240–00–060-2941

6240-00-183–0669

5910-00–833–5%75

5910–00–177–4300

5961–00-488-9927

5961–00401-6210

5961-00493–1102

5961–00–689–1455

5961-00438-6453

210–0259–00

2L0–0457–00

210-0583-00

210–0586–00

210–0940-00

2104–04-00-252CN

Z1l-ollol-oo

211–0116-00

213-0020–00

213-0153–00

214–0579-00

214-5127-00

214-IA36–00

214-IIJ39-02

2314-lA39-03 80009

214-1190-00

80009

78189

80009

5940–00474-9824

5310-00–841–81106

53L0–00-006–8168

5310-00–836–3520

5310-00–158-5237

5940-00-847-31J38

5305.00492–2145

5305-00-005-8245

5305–00–005-8247

5305-00–283-1909

5940-00-935-8313

3LI0-00+2-8406

5930–01–020-6724

5360-00–480–3639

5360–00447-8721

6625–01–066–3336

9-2

Tektronix AM-6786U Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SECTION 0

SECTION 2

TABLE 2-1

TABLE 2-2

SECTION 3

SECTION 4

TABLE 4-1

SECTION 5

Table 4-2

TABLE 5-1

TABLE 5-2

TABLE 5-4

TABLE 5-5

TABLE 5-6

TABLE 5-7

TABLE 5-9

TABLE 5-10

SECTION 7