Tektronix 5A15N User manual

INSTRUCTION

MIARNIUAL

Serial

Number

Tektronix,

Inc.

Box

500

Beaverton,

Oregon

97005

Phone

644-0161

Cables:

Tektronix

070-1136-00

871

reproduced

any

form

without

permission

the

1971

Tektronix,

Inc.,

Beaverton,

Oregon.

Printed

the

United

States

America.

All

rights

reserved.

Contents

this

publication

may

not

owne

5AT5N

vaone

TABLE

CONTENTS

Page

SECTION

SPECIFICATION

SECTION

CALIBRATION

(cont)

Introduction

1-1

Services

Available

4-1

Table

1-1,

Electrical

Characteristics

Test

Equipment

Required

4-1

Calibration

Equipment

Alternatives

4-2

Special

Calibration

Fixtures

4-2

SECTION

OPERATING

INSTRUCTIONS

Test

Instruments

4-2

Introduction

2-1

Accessories

Plug-In

Insertion

and

Removal

2-1

Short-Form

Procedure.and

Index

4-2

Controls

and

Connectors

2-1

Calibration

Procedure

4-2

Basic

Operation

2-1

—

Preparation

2-1

Step

Attenuator

Balance

2-2

SECTION

PARTS

LISTS

AND

DIAGRAMS

Gain

Check

Symbols

and

Reference

Designators

5-1

General

Operating

Information

2-2

Parts

List

Abbreviations

5.2

Applying

Signals

Schematic

Diagrams

Input

Coupling

2-2

Component

Board

Locations

(

Deflection

Factor

2-3

Electrical

Parts

List

Mechanical

Parts

List

SECTION

CIRCUIT

DESCRIPTION

Introduction

3-1

CHANGE

INFORMATION

Plug-In

Logic

3-1

Input

Coupling

3-1

Input

Attenuator

3-1

Amplifier

3-1

Abbreviations

and

symbols

used

this

manual

are

based

taken

directly

from

IEEE

Standard

260

“Standard

Symbols

for

Units’,

MIL-STD-12B

and

other

standards

Introduction

4-1

the

electronics

industry.

Change

information,

any,

SECTION

CALIBRATION

Instrument

Maintenance

4-1

located

the

rear

this

manual.

5A15N

Fig.

1-1.

5415N

Amplifier.

5A15N

SECTION

SPECIFICATION

Change

information,

any,

affecting

this

section

will

found

the

rear

this

manual.

Introduction

The

5A15N

Amplifier

general-purpose

amplifier

plug-in

unit

for

use

with

Tektronix

5100-series

oscillo-

scopes.

The

unit

features

solid-state

circuitry

and

simplicity

front-panel

controls,

which

include

lighted

knob

skirt

provide

direct

readout

calibrated

deflection

factor.

The

5A15N

has

calibrated

deflection

factors

from

one

milli-

volt

per

division

five

volts

per

division

and

bandwidth

from

least

two

megahertz.

While

designed

pri-

marily

for

use

vertical

amplifier,

the

unit

can

operated

association

with

the

horizontal

deflection

system

the

oscilloscope

for

X-Y

displays.

The

following

electrical

characteristics

apply

over

ambient

temperature

range

+50°C.

Refer

the

5100-series

Oscilloscope

System

manual

for

environmental

characteristics.

this

manual

the

word

Volts/Div

division

refers

major

graticule

division.

TABLE

1-1

ELECTRICAL

CHARACTERISTICS

Characteristic

Performance

Requirement

Supplemental

Information

Deflection

Factor

Calibrated

Range

millivolt/division

volts/division

steps

1-2-5

sequence

Accuracy

Within

Step

Attenuator

Balance

Adjustable

for

one

division

less

trace

movement

VOLTS/DIV

rotated

throughout

its

range.

Uncalibrated

(Var)

Range

least

2.5:1.

Frequency

Response

Bandwidth

Div

Reference)

(Direct)

Coupled

least

megahertz.

(Capacitive)

Coupled

hertz

less

least

megahertz.

Step

Response

(Displayed)

Aberrations

+2%

pulse

amplitude.

Inputs

Resistance

megohm,

within

1%.

Capacitance

~47

picofarads

Time

constant

normalized

for

micro-

seconds,

within

3%.

Maximum

Safe

Input

Voltages

(Direct)

Coupled

350

(DC

Peak

AC)

(Capacitive)

Coupled

350

VDC

POSITION

Range

least

and

—10

divisions

fr6m

grati-

cule

center.

1-1

5AI5N

SECTION

OPERATING

INSTRUCTIONS

Change

information,

any,

affecting

this

section

will

found

the

rear

this

manual.

Introduction

The

5A15N

Amplifier

Plug-in

operates

with

Tektronix

5100-series

oscilloscope.

understanding

the

5A15N

Operation

and

capabilities

essential

for

obtaining

best

results.

This

section

the

manual

gives

brief

functional

description

the

front-panel

controls

and

connectors,

familiarization

procedure,

and

general

operating

informa-

tion.

PLUG-IN

INSERTION

AND

REMOVAL

The

5A15N

calibrated

and

ready

for

use

it is

received.

can

installed

any

compartment

the

9100-series

oscilloscope,

but

it is

intended

for

principal

use

vertical

compartments

(the

center

and

left

compart-

ments).

For

X-Y

operation,

the

5415N

may

also

installed

the

horizontal

(right)

compartment

(refer

the

5100N

Oscilloscope

System

Instruction

Manual

for

infor-

mation

X-Y

operation).

NOTE

the

oscilloscope

system

receives

DISPLAY

logic

levels

from

the

vertical

plug-ins,

designed

display

the

unit

the

left

compartment.

install,

align

the

upper

and

lower

rails

the

5415N

with

the

plug-in

compartment

tracks

and

fully

insert

(the

plug-in

panel

must

flush

with

the

oscilloscope

panel).

remove,

pull

the

release

latch

disengage

the

5A15N

from

the

oscilloscope.

CONTROLS

AND

CONNECTORS

This

brief

description

the

function

operation

the

front-panel

controls

and

connectors.

detailed

information

given

under

General

Operating

Information.

DISPLAY

Applies

and

removes

logic

levels

the

oscilloscope

system

enable

disable

plug-in

operation.

The

switch

functions

only

when

the

plug-in

operated

one

the

vertical

plug-in

compartments.

POSITION

Positions

display.

VOLTS/DIV

Volts

per

major

graticule

division.

Selects

calibrated

deflection

factors

from

mV/Div

V/Div:

steps

1-2-5

sequence.

Knob

skirt

illuminated

indicate

de-

flection

factor.

Variable

Volts/Div

Provides

uncalibrated,

continuously

variable

deflection

factor

between

calibrated

steps;

extends

range

12.5

V/Div.

Balances

the

input

amplifier

for

minimum

trace

shift

throughout

the

VOLTS/DIV

gain-switching

range.

STEP

ATTEN

BAL

AC-DC:

Button

pushed

selects

Capacitive

coupling

input

signal;

button

out

selects

direct

coupling

input

signal.

Input

Coupling

Pushbuttons

GND:

Disconnects

the

input

signal

and

provides

ground

reference

the

amplifier

input

stage.

PRE

CHG:

Both

AC-DC

and

GND

buttons

pushed

allows

pre-

charging

the

coupling

capaci-

tor.

Release

GND

for

measure-

ment.

Input

Connector

BNC

connector

for

application

external

voltage.

signals.

Includes

coded-probe

input

ring

for

activa-

tion

X10

readout.

BASIC

OPERATION

Preparation

The

first

few

steps

the

following

procedure

are

intended

help

quickly

obtain

trace

the

screen

and

prepare

the

instrument

for

immediate

use.

The

remainder

the

steps

demonstrate

some

the

basic

functions

the

SAISN.

Operation

other

instruments

the

system

described

the

instruction

manuals

for

those

units.

Insert

the

unit

all

the

way

into

the

oscilloscope

system

plug-in

compartment.

Turn

the

oscilloscope

Intensity

control

fully

counter-

clockwise

and

turn

the

oscilloscope

system

Power

ON.

Pre-

2-1

Operating

Instructions—5A15N

set

the

time-base

and

triggering

controls

for

2-millisecond/

division

sweep

rate

and

automatic

triggering.

Set the

5A15N

front-panel

controls

follows:

DISPLAY

(deflection

factor

illuminated)

POSITION

Midrange

VOLTS/DIV

Calibrated

STEP

ATTEN

BAL

Midrange

Input

Coupling

DC,

GND

Adjust

the

Intensity

control

for

normal

viewing

the

trace.

The

trace

should

appear

near

the

graticule

center.

Move

the

trace

two

divisions

below

the

graticule

centerline

with

the

POSITION

control.

Apply

400-millivolt

peak-to-peak

signal

(available

the

oscilloscope

Calibrator

loop)

through

test

lead

probe

the

input

connector.

Release

the

GND

pushbutton.

The

display

should

square

waves

four

divisions

amplitude,

with

the

bottom

the

display

the

reference

established

step

Rotate

the

Variable

control

throughout

its

range,

observing

reduction

the

display

amplitude.

Return

the

Variable

contro!

the

CAL

detent

(calibrated

Volts/Div)

position.

demonstrate

AC-coupled

operation,

re-position.

the

display

with

the

POSITION

control

place

the

bottom

the

display

the

graticule

centerline.

Push

the

button

and

note

that

the

display

shifts

downward

about

two

divisions

its

average

level.

Step

Attenuator

Balance

the

STEP

ATTEN

BAL

control

not

properly

adjusted,

the

CRT

zero

reference

point

(trace

spot)

will

shift

vertically

due

differential

imbalance

the

amplifier

the

VOLTS/DIV

switch

rotated

throughout

its

range.

The

shift

noticeable

the

most

sensitive

positions.

With

the

instrument

operating,

ground

the

input

(GND

button

pushed

in)

and

set

the

VOLTS/DIV

switch

Move

the

trace

the

graticule

center

with

the

POSI-

TION

control.

Rotate

the

VOLTS/DIV

switch

throughout

its

range

and

adjust

the

STEP

ATTEN

BAL

control

for

minimum

trace

shift.

2-2

Gain

Check

The

vertical

and

horizontal

deflection

systems

the

5100N-series

oscilloscopes

are

gain-standardized

permit

plug-in

moved

from

one

oscilloscope

another

(or

from

one

compartment

another

within

the

oscilloscope)

without

the

need

recheck

the

calibration

each

time.

However,

the

5A15N

gain

can

checked

and,

necessary,

adjusted.

This

completes

the

basic

operating

procedure

for

the

5AI5N.

Instrument

operations

not

explained

here

those

that

need

further

explanation

are

discussed

under

General

Operating

Information.

GENERAL

OPERATING

INFORMATION

Applying

Signals

When

measuring

voltage,

use

the

largest

deflection

factor

V/Div)

when

first

connecting

the

5A15N

unknown

voltage

source.

the

deflection

too

small

make

the

measurement,

switch

lower

deflection

factor.

general,

probes

offer

the

most

convenient

method

connecting

signal

the

input

the

5A15N.

Tektronix

probes

are

shielded

prevent

pickup

electrostatic

inter-

ference.

10X

attenuator

probe

offers

high

input

impedance

and

allows

the

circuit

under

test

perform

very

normal

operating

conditions.

The

5A15N

its

designed

for

compatibility

with

coded

probes,

such

the

Tektronix

P6060

and

P6052

Passive

Probes.

The

input

con-

nector

has

outer

ring

which

the

coding

ring

the

probe

connector

makes

contact.

This

type

probe

allows

the

vertical

deflection

factor

indicated

the

readout

correspond

with

the

actual

deflection

factor

the

probe

tip,

eliminating

the

need

consider

the

attenuation

factor

the

probe

when

measuring

the

signal

amplitude

the

graticule

scale.

See

your

Tektronix,

Inc.,

catalog

for

charac-

teristics

and

compatibility

probes.

for

use

with

this

system.

Sometimes

unshielded

test

leads

can

used

connect

the

5A15N

signal

source,

particularly

when

high-

level,

low-frequency

signal

monitored

low-impedance

point.

However,

when

any

these

factors

missing,

becomes

increasingly

important

use

shielded

signal

cables.

all

cases,

the

signal-transporting

leads

should

kept

short

practical.

sure

establish

common

ground

connection

between

the

device

under

test

and

the

5A15N.

The

shield

coaxial

cable

ground

strap

signal

probe

provides

adequate

common

ground

connec-

tion.

Input

Coupling

The

AC-DC

pushbutton

switch

allows

choice

input

coupling.

The

type

display

desired

will

determine

the

coupling

used.

—_—

—

coupling

(button

out)

can

used

for

most

applica-

tions.

However,

the

component

the

signal

much

larger

than

the

component,

coupling

(button

in)

will

probably

provide

better

display.

coupling

should

used

display

signals

below

about

hertz

they

will

attenuated

the

position.

the

position,

the

component

blocked

capacitor

the

input

circuit.

The

low-frequency

response

the

position

about

hertz

(—3

point).

There-

fore,

some

low-frequency

attenuation

can

expected

near

this

frequency

limit.

Distortion

will

also

appear

square

waves which

have

low-frequency

components.

The

GND

pushbutton

provides

ground

reference

the

amplifier

input.

The

signal

applied

the

input

connector

presented

with

one-megohm

load,

while

the

amplifier

Input

grounded.

This

eliminates

the

need

externally

ground

the

input

establish

ground

reference.

Pre-charging.

minimize

surge

currents

the

circuit

under

test

when

using

deflection

factors

mV/Div

through

mV/Div

and

probe,

use

the

AC-DC

and

GND

pushbuttons

take

advantage

the

pre-charging

circuit

incorporated

inthe

unit.

The

pre-charging

circuit

permits

charging

the

coupling

capacitor

the

source

voltage

when

the

and

GND

buttons

are

pressed

in.

The

procedure

for

using

this

circuit

follows:

Operating

Instructions—5A15N

Before

connecting

the

5A15N

signal

containing

component,

push

the

and

GND

buttons.

Then

connect

the

input

the

circuit

under

test.

Wait

about

one

second

for

the

coupling

capacitor

charge.

Remove

the

ground

from

the

coupling

capacitor

(GND

button

out).

The

display

will

remain

on-screen

and

the

component

can

measured

the

usual

manner.

Deflection

Factor

The

amount

trace

deflection

produced

signal

determined

the

signal

amplitude,

the

attenuation

factor

(if

any)

the

probe,

the

setting

the

VOLTS/DIV

switch,

and

the

setting

the

Variable

control.

The

cali-

brated

deflection

factors

are

indicated

the

VOLTS/DIV

switch

only

when

the

Variable

control

rotated

fully

clockwise

into

the

detent

position.

The

range

the

Variable

control

least

2.5:1.

It.

provides

uncalibrated

deflection

factors

covering

the

full

range

between

the

fixed

settings

the

VOLTS/DIV

switch.

The

control

can

set

extend

the

deflection

factor

least

12.5

volts/division.

2-3

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