Tektronix 7D15 Instruction Manual

Ibktronix^

COMMITTED

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P.O. Box

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Product

Group

Inc.

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42

97077

PLEASE CHECK FOR CHANGE

AT

THE

REAR

THIS MANUAL.

OF

7D15

UNIVERSAL

COUNTER/TIMER

INSTRUCTION

Serial Number

MANUAL

INFORMATION

First Printing

Revised

SEP 1974

APR 1985

Copyright

®

Contents of this

form

without

the written

1974

publication

Tektronix,

may

permission

Inc.

All rights

not be

of Tektronix,

reserved.

reproduced in

Inc.

any

Products of Tektronix, Inc.

by U.S.

and foreign

patents and/or

TEKTRONIX, TEK,

registered trademarks of Tektronix,

is

a registered trademark of

Printed

are reserved.

in

U.S.A. Specification

INSTRUMENT

Each instrument

or stamped on

designates the

of the serial number

unique

United States

to each

manufacture

has

the chassis.

country of

instrument.

have six

is identified

and

Its

SCOPE-MOBILE,

Tektronix

and price

SERIAL

serial number

a

The first

manufacture.

are

assigned

Those

unique

follows:

as

subsidiaries

pending

and

Inc.

TELEQUIPMENT

U.K.

Limited.

change

NUMBERS

on

partel

a

number

The

sequentially

manufactured

digits.

The

are

patents.

privileges

insert,

or

last five

and

country

covered

are

tag,

letter

digits

are

in

the

of

BOOOOOO

100000

200000 300000

700000

Tektronix,

Tektronix Tektronix United

Sony/Tektronix,

Tektronix Holland,

Inc.,

Beaverton,

Guernsey,

The Netherlands

Ltd.,

Kingdom,

Japan

NV,

Oregon,

Channel

Ltd., London

Heerenveen,

USA

Islands

.

7D15

Section 1 SPECIFICATION

Introduction

Electrical

Environmental

Physical

Section 2 OPERATING

Installation

Front

Modes

Operation

Characteristics

INSTRUCTIONS

Panel

Controls

of

Operation

and

WARNING

THE

FOLLOWING

ARE FOR

TO AVOID

ANY

SERVICING

IN OPERATING

QUALIFIED

Section

3 CIRCUIT

USE BY

PERSONAL

TO

Introduction

Block

General

Input

Clock

Gate

Counters

Reset

Trigger

Time

Arm

Inputs

Reset

SERVICING

QUALIFIED

INJURY,

OTHER THAN

INSTRUCTIONS

DO

SO.

DESCRIPTION

Diagram

and Readout

Input

Amplifiers

Base

Circuitry

TABLE

Characteristics

and Connectors .

Checkout

INSTRUCTIONS

PERSONNEL

DO

NOT

THAT

UNLESS YOU

Description

ONLY.

PERFORM

CONTAINED

ARE

OF

Page

1-1

1-7 1-7

2-1

2-2

2-7

2-10

3-1

3-2

3-7

3-8

3-9

CONTENTS

Section

Section 4

Section 5 CALIBRATION

Section 6 INSTRUMENT

Section 7

Section

CHANGE INFORMATION

3 CIRCUIT DESCRIPTION

Readout Theory

General

CH 1 Column and

CH 2 Column

Overflow

-5

V Supply

MAINTENANCE

Introduction

Preventive

Troubleshooting

Corrective

Component

Recalibration

Repackaging

Recalibration

Test

Equipment

Calibration

Index

ELECTRICAL

Abbreviations

DIAGRAMS

8

ILLUSTRATIONS

Symbols

9 MECHANICAL

and Row

Maintenance

Replacement

After Repair .

for

Shipment

Interval

Required

Procedure

to Calibration

OPTIONS

PARTS

and

AND

and

Reference

PARTS

Row

Procedure

LIST

Symbols

CIRCUIT

Designators

LIST

(Cont’d)

Data

Date

. . .

.

BOARD

Page

3-10 3-10 3-10

3-12

-

3-13 3-14

4-1

5-

4-1

4-3

4-4 4-4

4-4

5-1

5-4

5

6

1

REV NOV

1981

7D15

The

general

is

for both

warnings

manual

safety

operating

and

where

cautions they

summary.

Terms

CAUTION

could result

WARNING

that

Terms As

In This

could result in

Manual

statements

in damage

statements

Marked on

CAUTION indicates

mediately

hazard

DANGER

accessible as one

accessible as

to property

indicates

reads the marking.

OPERATORS

information

and

apply,

identify

to the

identify

personal

Equipment

a personal

including

a personal

in

this

servicing

will

be found

but may

conditions

equipment

conditions

injury

injury hazard

one reads

the equipment

injury hazard

part of

personnel.

or loss

thesummary

Specific

throughout

not

appear

or

practices that

or other

the marking,

property.

or

practices

of life.

not im-

itself.

immediately

SAFETY

the

in this

or

a

SUMMARY

Grounding

This

product

tor of the power

power

connecting

protective

conductor

tion.

Danger

Upon

accessible

trols

that may

electric

Use the

only

Use

product.

Use

only a

the

is

cord into

to the

ground

in the

Arising

loss of

conductive

shock.

Proper

the

power cord

power

Product

grounded through

cord.

To

avoid electrical

a

properly

product input

connection

power

From

the

protective-ground

parts

appear

to

Power

and

cord that

by way of the

cord is

Loss

of

(including

be insulating)

Cord

connector

is in

the

grounding

wired

receptacle

or

output terminals.

essential for

Ground

connection, all

knobs and

specified

good

condition.

conduc-

shock,

plug

grounding

safe

can render

for

the

before

A

opera-

con-

an

your

Symbols In This

This

%

cautionary

found.

Marked

A

Symbols As

DANGER

Protective

ATTENTION

Power

This

that will

supply

and

grounding

safe

Source

product is intended

not

apply

conductors

ground. A

operation.

protective

conductor

Manual

symbol indicates

or other

on

Equipment

—

High

voltage.

ground

more than

or

between

in the

(earth)

—

refer

to

operate from

250 volts rms

either

ground

power

to manual.

connection

where

information

terminal.

a power

between

supply

by

cord

is

essential

applicable

is to

be

source

the

conductor

way

of the

for

For detailed

see maintenance

Refer

personnel.

Use the

To avoid

voltage

list

for

Refer

Do

Not

To avoid

explosive

certified for

Do Not

To avoid

covers or covers

information

cord and

Proper

fire

rating

your

product.

fuse

replacement

Operate in

explosion,

atmosphere

such

Remove

personal

panels.

and

panels

hazard,

and

on power

section.

connector

Fuse

use

current rating

to

Explosive

do not

unless

operation.

Covers

injury,

Do

not

operate

properly

changes

only the

as

qualified

Atmospheres

operate

it

or

Panels

do

not

the

installed.

cords

and

connectors,

to

qualified

fuse

of

correct

specified

service

this

has

remove

product without

been

in

personnel.

product

specifically

the

service

type,

the

parts

in

product

an

the

i

II

REV

B JAN

1981

7D15

Not

Do

not

Do

product

resuscitation

and

aid

Care

Use

Dangerous

avoid

To

and

tions

FOR

Service

perform

unless

personal injury, do

components while

Alone

internal service

another

person capable

is present.

When Servicing

voltages

exist at

SERVICE

QUALIFIED

Refer also

With

several

not touch

power

to the

adjustment

or

of

Power

points

exposed

is on.

rendering

On

in

SAFETY

SERVICE

preceding

this

of

first

this product.

connec-

SUMMARY

PERSONNEL ONLY

Operators

Disconnect

soldering,

Power

This product

that

supply

and ground.

grounding conductor

safe

Safety Summary.

power

replacing

or

Source

is intended to

will not apply

conductors or

A protective

operation.

before

more

removing

components.

operate from a

than

250

between

ground

in the

either supply

connection

power cord is

power

conductor

way

by

essential

panels,

source

protective

volts rms between

the

of

for

1981 m

JAN

@

Section

1—

7D15

Introduction

The

will function in any

It

nected to the

The

ns

10

to

events. Manual Stop Watch—to

7D15

10®

is

a

oscilloscope.

has

Period

s.

counter plug-in designed for

digital

plug-in

eight

modes

Averaging—

The electrical specifications

for instruments calibrated

noted. The information

be construed

MEASUREMENT

as a

Characteristics

MODES

listed in

requirement

Frequency Mode

Range

Resolution

‘

Accuracy

SPECIFICATIONS

compartment;

When

an ambient temperature of

at

for proper instrument operation.

in

used

of

operation: Frequency—

ps

10

10®

s.

listed in

Supplemental

the

however,

horizontal

the

resolution, TIM—

Performance Requirement

the

Information column indicates typical instrument

ELECTRICAL CHARACTERISTICS

megahertz

225

DC to

hertz minimum

0.1

=

(hertz)

Efreq

use with all

in

the vertical compartment,

readout-equipped

7000-Series

compartment, mainframe triggers

to

10®

MHz

direct. Frequency Ratio—

Averaging—

TIM

s,

DC to 225

10 ns

column are valid over the

-»-20°C

TABLE

±

TB

1-1

X

F-,n

to +30‘*C

±

and after

Performance

1/T

Requirement

Oscilloscope mainframes.

selectable

a

are available

1 ns accuracy.

five

a

display is internally

to the

7D15.

10®

to

0

Totalize—

environmental range

stated

minute warmup unless otherwise

operation and

:1,

con-

Period-

10®

1 to

is not

to

Period

Range

Resolution

*

Accuracy

Time

Range

Resolution

'Accuracy

Mode

Interval

Mode

(nominal)

=

100%

(%)

Efreq

10 nanoseconds

steps.

picoseconds

10

=

±

Eper

(sec)

(%)

=

100%

TB X Pj^

6 nanoseconds to

0.1

nanosecond usable.

=

(sec)

(%)

=

TB

100%

Eji

*

r±

TB

10^

to

seconds with averaging times of

maximum.

10-®

1 X

±

M

T„,±1X10-»lKlPck

PinXM

X

10®

Pj„ ±

±

TB

seconds

with

(Pck/VM)

±—

±

K± P

averaging

10“®

10-9

±

I

in

XI

to X1000

ck

times

of XI

to XI 000.

±

K

±

K

in decade

'

Refer

REV.

A,

to Figs.

APR.

1-2

1976

through

1-7

et

the reer of this

The

complete

ratio and statistical distribution factors.

section for edditionel

expression for Time

eccurecy

informetion.

Interval

averaging

depends

on

signal

to

noise

1-1

Specifications—

7D

15

Frequency

CH

B/EXT

Range

Totalize,

Range

Manual

Stop Watch

Range

Formulas

signal

gate time;

the

counter

Characteristics

Ratio

clock

CH

B:

given

where

(whichever

is the

gate circuit;

TB (dec

is

applicable);

frequency

dv/dt

%)

M is the

of the

is the

10-’

to

10®

0

to

(Manual

10®

0

to

is

the

time base

number of

unknown

signal slope

10-*

counts

OFF

ON—

seconds

signal;

at

TABLE 1-1

control

NOTE

accuracy;

averages taken;

is

the

input to

(cont)

Performance

or

electrical

is

the

equal

the

gate; K

period

is the

to the

Requirement

control

or time

measurement

peak

noise

is equal

from

to

CH

A,)

interval

dock

amplitude

of

the

period;

at the

unknown

T is

the

input

to

INPUT

Frequency

DC Coupled

AC

Sensitivity

CH A

TRIG

Input

Capacitance

Minimum

Between

TIM

Characteristics

SIGNALS

Range

Coupled

& B inputs

SOURCE

Resistance

Pulse Width

gate

Samples

Averaging

CH

A & B

(CH B

and

“OFF" time

During

Operation

only)

Performance

DC to 225 megahertz

hertz

5

100

Vertical

Approximately

5 nanoseconds

10

to 225

millivolts

deflection

0.5

divisions

1

.0

divisions

or

to

the

whichever

nanoseconds

megahertz

peak-to-peak

to

50

to

225

vertical

is

less.

1 megohm,

of:

system

Requirements

MHz

bandwidth,

picofarads

22

Supplemental

1

Information

Maximum

1-2

Input

Voltage

200

at 200

volts

DC

megahertz

linearly

derated

to

20

volts

=

E

max

20

+

180

-

(1

Fjp(MHz)/200

REV CXJT

1982

TABLE

1-1

5

Specifications—7D 1

(cont)

Characteristics

Minimum

Signal Period in

"PER" Mode

Minimum

Width in Gate" Mode

Triggering

Preset Position

Level Control

Arming Inputs

Input R

Lead Time for

become effective

CH

"FREQ

Range: (CH A and

Range: TRIG

and

Performance

10

nanoseconds

Input

A

Pulse

B-CH A

Automatically triggers

CH

B)

.1 V,

±50

±5(X)

volts

SOURCE Approximately ±2.5

C Approximately

Pulse

to

nanoseconds

5

Requirements

at 0 volts

millivolts; 1 V,±5 volts;

divisions

10 kiiohm,

picofarads

20

10 V,

10

nanoseconds

Supplemental

Information

Time

Lead

effect of

Minimum rise

Sensitivity

Maximum

External

input

Minimum

Negate

to

"ARM"

and fall rate dv/dt

A ARM A logical

B ARM

Operating Voltage

Input

Voltage

Clock

In

Requirements

Amplitude

5 nanoseconds

per

occurs with

with +0.5 volt or

occurs with less than

applied

logical

>10 Volts

"1"

or

"0"

@ 1 sink < 0.2 milliampere

1

"1"

Logic

+10

±15

Internal

0.8 volt peak-to-peak

with

"0"

volts

switch

30% to

<

0.2 volt or no signal applied

> +0.5

to

—5

volts

selectable

volt

70% duty cycle

microsecond

either

greater.

sine wave

no signal

+0.2

volt

or

pulse

A

Coupling

AC

@

1-3

Specif

ications—7D

5

1

Maximum

Frequency

RESET—

Input

Amplitude

Characteristics

Input

Range

Front

Panel

R and

C

Requirements

Voltage

Performance

±50

volts

DC, 20

1

megahertz

tional.

10

nanosecorKis,

clock

available.

20 hertz

Nonoperational.

Reset

counters

circuits.

to

initializes

are

affected,

Approximately

"1

"

Logic

+

2 volts

TABLE

Requirements

volts

peak-to-peak

±5%; Phase

5

megahertz;

the

including

10

kilohms,

or

greater

1-1

(cont)

Lock

100

nanoseconds

Phase

instrument.

averagir^g

30 picofarads

Opera-

Lock

All

Supplemental

Information

Pulse

Maximum

Input

Rise and

Maximum

Reset

(located

Interface

Rise

Width

Hold

Signal

Rear

Interface

Rise

Propagation

Signal

effective

Width

Operating

Voltage

Falltime

Input

on Rear

B13)

and

Falltime

(located

B22)

and Falltime

Delay

to

become

or

ineffective

Voltage

on

for

Logic

>

500

+10

volts

100

nanoseconds

±15

volts

"0"

+

0.5

nanoseconds

—10

to

volt or less

volts

or

less

Negative-going

pulse

< 1 00

nanoseconds

>

500

nanoseconds

TTL

compatible,

<

200

nanoseconds

<100

nanoseconds

transition

negative-logic

TTL

compatible

signal

1-4

I

@

Specifications—

7D

15

INTERNAL

Crystal

Frequency

Accuracy

0°C to

Long

OUTPUT

SIGNALS

Monitor Signals

Clock

Characteristics

TIME

BASE

Oscillator

+50°

C Within

Term

Drift

Out

Performance

0.5 part per million

part

or less in

1

"1"

Logic

"0"

Logic

compatible

milliamper

TABLE

Requirements

10^

=

+0.5 volt

<

volt into

0

without

current

1-1

per month

±10%

50

ohm load

capacity)

(cont)

into

50

50 ohms

ohms.

TTL

(1.6

Supplemental

5 megahertz

Zout

ohms

Information

A

and

Externally

with ±5

maximum

Preset Position

Analog

Connected)

Display

Position

Amplitude

Rise

and

Propagation

BNC's

Trigger

B

volt

and in the

(Internally

Falltime

delay: Input

to plug-in

Level

Programable

Signal

interface

kilohm

Zout

Vq,j^ = ±0.5 volt into 1 megohm

(lOX

Front

Gate" signal,

"B"

Controlled

control

1 .0 division.

1

scaling)

panel switch

out

by front

selects either

"Pseudo Gate",

panel

Can be

set

from

±20%.

Less than

2 nanoseconds

"True

or "Channel

screwdriver

0.2

1 div

to

The

Pseudo

representation

Changed

True

Pseudo

CH

Gate;

B:

by

Gate;

16

Gate signal is

of the

7D15

resistor

alteration

20

nanoseconds

18 nanoseconds

nanoseconds

high-speed

a

gate

signal

Specifications—7D15

Characteristics

Displayed

"effective"

operation,

of gate

display

proper

gate

gate width

In "Freq"

display

to

accumulation

non-accumulation

External

Display

Amplitude

width

or

"events":

lead

time

over

guarantee

to

required

CH

or

of

count.

TABLE 1-1

Performance

(cont)

Requirements

Matches

on

correct

base

used

>

1

nanosecond

Supplemental

to within

calibration

Information

1

nanosecond;

of

horizontal

depends

time

B

Located

display"

controls

Logic

on

except

have

"1"

front partel,

position

no effect

=

-^0.5

volt ±10%

same

and

as

"analog

amplitude

into

50

ohms.

"0"

Logic

compatible

milliamper

<

0

without

current

volt

Into

50

capability)

50 ohm

ohm

load

TTL

(1.6

Rise

Propagation

input

"True

Gate"

to "Effective

Busy

Signal

Rear

Interface

Rise and

Delay

DISPLAYS

Gate Indicator

Display

and

Falltime

delay from

BNC's to display

Gate"

& "Pseudo

output pulse

Gate"

(located on

A22)

Falltime

After Reset

Mode Switch

width

Command

>

1 .5

nanoseconds

Front panel

of

readout

with 50 ohm

switch allows selection

"follow

or store"

load

1

True

Gate:

Pseudo

CH B

Matches

Nominally

logic

100

nanoseconds

150

nanoseconds

A

LED lamp

condition

^

Gate:

17

to

^

21

nanoseconds

*»19

nanoseconds

within

TTL

1

nanosecond

compatibility,

maximum

indicates

internal

positive

gate

Display Time

Control

Continuously

less

to

approximately

control

the

in

display

variable

maximum

is held

indefinitely

from

0.1 second or

5

seconds. With

clockwise

position,

Specifications—7D

15

Characteristics

Readout

Resolution,

Frequency

Per,

TIM

Multi-per

Multi-TIM

Minimum

8 digits

cant

Overflow

on Channel

0.1 hertz

10

nanoseconds

picoseconds

10

picoseconds (limited)

100

ENVIRONMENTAL

Refer

to the specification

TABLE

Performance

of display, the

digits have

">"

by

2 of

readout system

TABLE

M <cont)

Requirements

four

most

zero

suppression.

arrow.

Legend

1-2

CHARACTERISTICS

for

the

associated

signifi-

located

oscilloscope.

Supplemental

•

Information

Size

Weight

PHYSICAL

all

Fits

3.1 Pounds

7000-Series plug-in

TABLE

1-3

CHARACTERISTICS

compartments.

kilograms)

(1.4

@

1-7

Specif

ications—7D

5

1

N

X

o

N

I s

8

N

I S

o

percent.

in

stated

>-

N

X

o

z

S

LU

D

a

LU OC LL

h-

D

Q.

z

N

X

8

N

X

accuracy

mode

Frequency

7D15

1-2.

Fig.

o

10%

ae

1-8

ae

WORST

CASE MEASUREMENT

N

X

a?

°

ERROR

a«

8

o

REV. A,

APR.

1432-2

1975

hertz.

in

stated

accuracy

mode

Frequency

7D15

1-3.

Fig.

Specif

ications—7D

15

6

(

(/)

E

o

Q O

oc

UJ

Q-

lA

(

v>

a.

o

10%

1-10

WORST

CASE

MEASUREMENT

ERROR

REV. A.

APR.

1432-4

1975

Specifications—7D

15

X1

=

AVERG

1ms

=

CLOCK

time.

in

stated

accuracy

mode

Period

7D15

1-5.

Fig.

REV.

A, APR.

1975

WORST

MEASUREMENT ERROR

CASE

1432-5

1-11

Specifications—7D 15

(/)

E

o

t/t

E

o

present.

(A

E

in

stated

<

>

in

oc

a.

m

o

h-

o

Z

IXI

5

I- t—

D

in

a.

Z

o

I/I

c

o

accuracy

mode

Interval

Time

7D15

1-6.

Fig.

%

10

1-12

WORST

CASE

MEASUREMENT

ERROR

REV.

APR. 1975

A,

1432-8

Specif

ications—7D

15

time.

in

stated

accuracy

mode

Interval

Time

7D15

1-7.

Fig.

REV. A,

APR.

1975

WORST

CASE

MEASUREMENT

ERROR

1432-7

1-13

Section

2—

7D15

OPERATING

GENERAL

The 7D15

Tektronix

Universal

7000-series

time interval, and

effectively

To

known.

signal input

This section

connections.

installation

7D15

should

it

the 7D15

is

Tektronix

The

partment of

desired,

furnished

calibrated

Counter/Timer

Oscilloscopes to

totalize

to

the 7D15,

use

describes

7000-Series

be used

installed

when

(count

front-panel

ready

and

in one

plug-in unit

number

operation

the

for

Oscilloscopes;

of the

horizontal

in

a

INSTRUCTIONS

system

period,

ratio,

must be

information

any com-

in

waveform

triggers

measure

control

use as

vertical

operates

frequency

events).

of

capabilities

and

functions

received.

however,

compartments.

compartment.

It

with

frequency

or

of

and

can be

if

a

readout

the

instrument

the

general

installed

displayed

Mainframe

of

on

is

are

REV.

APR. 1975

A,

install,

To

it

slide

bottom

the

installed.

the 7D15

and

in. The

To

the

align

panel

front

corner will be

left

remove,

will unlatch.

upper and

will

on the

pull

Continue

lower

flush

be

in place

latch

rails of

with

against

(inscribed

pulling to

the 7D15

front of

the

the front

slide

with the

the

with

the 7D15

oscilloscope

oscilloscope and

when the

panel

identification

unit

the oscilloscope.

of

out

tracks and

the

7D15

"7015")

latch

is

at

fully

2-1

Operating

Instructions—

7015

A

TRIGGER

FRONT

PANEL

SSSlXaSBMHc

7015

CONTROLS

!;sousa]j

''iNPuralj

W

S

*»©

©j.

UNIVERSAL

COUNTER/TIMER

jl

|!

um

com I

M

tM

AND

CONNECTORS

jTofi

*

n

V

A

Input Connector:

A ARM Jack:

SLOPE

inward

selects

COUPL

both the

above

P-P

.IV,

TRIG

compartment.

'LEVEL

PRESET

Switch:

position

the

Switch:

DC and

approximately

SENS

IV,

10V

SOURCE

control

position,

Gates the

Selects

of

negative

Positions:

Position:

fully

When

the

slope.

Selects

AC

component

5 Hz

Controls

clockwise)

the

TRIG

selected,

A

Input.

whether

SLOPE

the

to

Selects

the

A

the

switch

Input

of

pass.

the

DC

sets

LEVEL

provides

logical Lo

positive-

selects

coupling

the

A Input

sensitivity

internal

trigger

the

DC trigger

monitor

jack

can

a

means

gates

or

negative-going

the positive

to be

used.

to

the

of

channel

vertical

of

level

the

be used

2-1

Figure

for

connecting

the

A Input off

slope

The

attenuator.

A trigger

amplifier

the

channel

level

to

DC

trigger

to

externally

slope

and the

outward

The

amplifier.

trigger

A trigger

0 volts.

level

the

and

of

the

outward

position

inward

or,

set

trigger

a

logical

signal

amplifier.

when

the

signal.

position

of

position

when

the

DC

trigger

Hi

gates

is to

the

installed

LEVEL

the

be

used

of

COUPL

allows

The

PRESET

level.

A

Input

as a

the

SLOPE

switch

onlv

in

the

control

on.

trigger.

freauencies

The

switch

connects

horizontal

position

is

in

the

1432-8

2-2

REV.

B, NOV.

1976

Operating

Instructions—

7D15

^

B ARM Jack:

SLOPE

The

switch

COUPL

both

above

P-P

.1 V, 1

TRIG

Switch: Selects

inward position

the negative slope.

selects

Switch:

the DC

and AC

approximately 5

SENS

V, 10 V

SOURCE

compartment.

LEVEL Control:

control fully

TRIG

LEVEL Jack:

PRESET

clockwise) sets

position,

SOURCE Switch:

Input

to both

the

Input

B

to

Input on.

Lo gates

the B

whether

of the SLOPE

Selects the

input coupling to

component

Hz

pass.

to

Positions: Select

Position: Selects

Controls the

May

the

The

trigger

A

trigger amplifier. The A

the

B

the

be

TRIG LEVEL

outward position

amplifier and B

the positive-

switch selects

of the

the

DC

used

to

A logical

Input

B

sensitivity

internal

of the channel B

level

trigger level

monitor

can

jack

of the

trigger

Input

Figure

Input off and a

Hi gates

or negative-going

be

to the

of channel B

vertical amplifier

the

be used to

SOURCE

amplifier. The

the B

slope

the positive

used.

attenuator.

volts.

to 0

DC

slope and

outward position

The

trigger amplifier.

trigger amplifier. The PRESET Position

trigger

level

externally set the DC trigger level.

pushbutton switch

inward

remains connected to the

2-2

logical Lo gates

of the

signal is

the

outward position

of the COUPL switch

inward position allows

The

trigger signal when

or, when

internally connects

position of the SOURCE switch

A trigger

the

to be

installed

LEVEL

amplifier.

Input on.

the B

of the

connects

frequencies

horizontal

trigger.

SLOPE

used as a

only

in a

(LEVEL

control is in the

the signal at A

connects

-

1432

A

9

REV D. DEC

1978

2-3

Operating

lnstructions->7D15

19

18

ID

17

FRONT

PANEL

CONTROLS AND

CONNECTORS

DISPLAYED

WAVEFORM

OUTPUT Connector:

Displayed Waveform Selector.

TRUE GATE: The

TIME setting.

CH B: The

conditioned signal

PSEUDO GATE:

POSITION Screwdriver Control:

STORAGE and DISPLAY

STORAGE Switch

ON: The

and then updates the

OFF: The 7D15 provides

7D15

stores the

Provides an output

main gate

high repetition-rate

A

These

mainframe

waveform. The repetition

derived from the output

signals may be displayed

vertical compartment.

TIME

digital display

display.

continuous

a

for monitoring

of

replica

Sets the position

of

the

display

during

the PSEUDO

of

rate

the TRUE GATE

of the channel B shaper circuit.

TRUE GATE.

the

GATE,

NOTE

on the CRT

of the signal

when the

displayed

measurement

CH B

7D15 is

on the CRT.

the end of

until

signal or,

function of

is a

used

in a

the

TRUE

the DISPLAY

GATE.

DISPLAY Control:

5 s.

the fully clockwise

In

2-4

display time

The

position (<»),

variable

control

the display is

Figure

holds the displayed

held indefinitely.

2-3

digital reading for

period of

a

REV. A.

0.1

APR.

s

to

1975

FRONT

PANEL

CONTROLS

CONNECTORS

AND

Operating

Instructions—

7D

15

GATE

RESET

including

RESET

initialize.

EXT

obtain

switch

CLOCK

pushbuttons.

LIGHT:

making a

OFF

FREQ

NORM

Pushbutton:

averaging

the

Connector:

different

a

(located

OUT

The

IN

Connector:

light

CLOCK

measurement).

Pushbutton:

position,

Pushbutton:

on

manner.

Pushbutton:

ON

WIDTH, or TIM A

mode, the 7015

The

circuits.

Provides a

Connector:

measurement

the right

indicates

When

this

With

however,

Whan

this

When

Mode;

B

counts

events

momentary

means

Provides a

interval

of the 7015)

side

Provides

state

the

the light

button

Input is

the A

button is

this

button

7015

the

present at

pushbotton

for

means

for FREQ

means

a

the

of

extinguished

is

depressed,

used

depressed,

is

counts

the

switch

remotely

connecting

for

measurements.

must

monitoring

for

gate.

main

7015 main

the

turn

to

the 7015

the

at

Input

B

resetting

switched

be

When lit,

the

main

the

MODE

the

rate

connector.

initializes

the 7D15.

external

an

to

internal

the

gate is

main

gate is

gate on and

switches

gate

main

selected by

the

apply an

To

the Ext.

main

off.

held

is

the CLOCK

instrument.

logical

A

(an

clock

external

position

oscillator

gate is

off. When the

off.

control

held

as

on (7015 is

the

When

on.

counters

All

causes

Hi

"In-house"

clock, an

(towards

selected

MOOE

gate in

main

the

in

switch.

When

are affected

the 7D15

standard)

internal

rear).

the

by

the

in

switch

the

PERIOD

in the

or

slide

CLOCK

process

is in

normal

A,

FREQ

to

of

the

TIM

1432-

REV. A,

APR. 1975

Figur*

2-4

2-5

Operating

Instructions—7D15

FRONT

PANEL

J

CONTROLS AND

CONNECTORS

MODE

TIME-

CLOCK

PERIOD A: The

of

10 ns

10®

to

s.

TIM WIDTH A: The

nearly the

TIM

slope

single

FREQ B: The

Input connector.

same level,

B: The

A

and

level selected

signal source, use the

7D15

triggers on the slope and level selected

7D15

7D15 starts on the slope and level selected by the

the other

but

starts on

7D15

by

the

B

A Input and the SOURCE switch.

measures frequency

AVERAGE

10 ms, 100 ms, 1

select the measurement

XI, X10, X100, X1000 Pushbuttons:

WIDTH A, and TIM A B modes

s, 10

Pushbuttons:

s

interval.

the

by

A TRIGGER section to

slope. The B TRIGGER section does not

the slope and

TRIGGER section.

directly

switch positions are used

These

These switch

to select the

selected

level

Two

from

DC to 225 MHz.

positions are used

number

of measurements

by the A TRIGGER section and

completely separate

in conjunction with the FREQ

in conjunction with the

TRIGGER section

A

function

signals may be used, or

Signal

connection

to be averaged.

measure

in this mode.

is made via

PERIOD

periods

and stops at

stops

on

the

mode

A, TIM

the

for

to

a

B

35

10 ns, 100 ns,

/is,10/is, 1

1

2-6

ms

Pushbuttons: Selects

Figure

2-5

the

clock

rates

to be used.

REV.

1432-12

APR.

A,

1975

MODES

OPERATION

OF

Time Interval

Operating

Measurements (TIM)

Instructions—

7D15

turn

rate is

10®

Watch

the GATE

the counter main

determined by the

be measured

can

s

in this

Manual Stop

This mode uses

manually

counting

of up

to

Event Counter

In the EVENTS mode, the

information

controls

10®

events can be counted in

Frequency

The

225 MHz

resolution of low-frequency

period of

(Frequency

Frequency Ratio

The

a range

resolution of up

the "standard" or reference signal is the

EXT

connected

from the

select the

B

counter triggering

Measurements

can measure frequencies

7D15

when

used in the

the

waveform

=

/Period).

1

Measurements

of one

ratio

of up to

CLOCK

to

signal

10^:1

10“^.

to

IN and the signal

the

B Input connector.

Input

connector.

this mode.

FREQ mode.

measurements, measure the

and calculate

another can be

to

and, depending on

In the Frequency

ON OFF switches

gate on

and off. The

to

CLOCK switches. Times

mode.

counters accept

7D15

The

TRIGGER

B

point. From 1

directly from

obtain greater

To

frequency

compared

the range, a

Ratio mode,

usually connected

be compared

to

dc to

with

to

Two

selected, TIM

mode measures

form.

controls such that

point on

LEVEL

other slope. See

The

measures

These two points are

TRIGGER

A

that turns the

select the

See

off.

Period

The

1000

to

10

The

on

a

TRIGGER

on and off

is

controls, see Fig,

basic modes

of time interval measurements can

WIDTH, and TIM A-*-B.

the time between

These points

the

controls and

TIM A-*-B

time between two points

the

controls

main

point

2-6d.

Fig.

are selected

the

counter main gate turns on

waveform selected

off

turns

Fig.

2-6c.

mode, like the

controlled individually,

select the

on, and the

gate

the waveform that turns the main gate

on

Measurements and

measures periods from

7D15

periods

ps.

waveform. These

can be averaged

period mode measures the

two points are selected

controls such that the

the

at

point selected

The

2-6A.

be

The TIM WIDTH

TRIGGER

on the

but

waveform.

controls

10®

s.

two points

by

and

wave-

the

at

and

mode,

the

to

Up

the

turns slope

points on a

two

by the

the same level

at

A

A SLOPE

TIM WIDTH

on a

such that

point on

Period

10 ns

to obtain

time between

counter main gate

by

period averaging mode holds

the waveform

B TRIGGER

Averaging

to

resolution of up

a

the level

A

A.

c.

A INPUT

D.

B

INPUT

j-p— PERIOD

O

-p-j

}

i

PERIOD

AVERAGED (X10)

fijnjnjn_njn_jTjn_nji_Fi

/

+SLOPE

WIDTH

HYSTERESIS

1

TIME

INTERVAL

H*

i

WINDOW

*1

1

TIME

Fig.

WIDTH

-SLOPE

INTERVAL

2-6.

Maafuremant intarvalc.

1

<

PERIOD

period averaged

TIM

WIDTH

A

A-P-B

TIM

REV. B.SEPT.

1977

2-7

Operating

the

counter

are

counted

Time

Interval

Averaging

short

as six

nanosecond.

statistically

shot

time

obtaining

intervals

repetitive

selected

number

registers

of

interval

cycle

is

of

averaged.

Time

interval

intervals

(10, 100,

of

is

averages.

Time

interval

being

(a non-repetitive

synchronized

synchronization

lnstructions-7015

main

(see Fig.

gate

on

2-6B).

until

Averaging

makes

possible

nanoseconds

This

reducing

interval

the

true

averaging

intervals

another

averaging

measured

with

increased

the

±1

measurements.

value

increases

are

available.

or

1000)

available.

consideration

might

signal),

the

counter

are

discussed

time

a usable

resolution

count

can

is

largely

should

vary

or

later.

1,10,

when

100

interval

resolution

error

inherent

The

with

be

used

whenever

The

number

determined

Overflowing

for

selecting

not be

during

the

signal

clock

rate.

or

1000

periods

measurement

up

to 0.1

is

achieved

in single

probability

the

number

several

of

averages

by the

the

counter

the

number

used, when

measurement

repetition

The

problems

the

rate

by

of

Unlike

gate

makes

then

answer.

gate

is

as

ready.

With

accuracies

the

measurement

times.

pulses

interval,

1000

fractional

sometimes

the

measured.

timing

time

graphical

While

amount

interval

period

on

for

a certain length

a

predetermined

averages

For

instance,

is

turned

ten

a

of one

time

interval

In

this

of

the

so 1

100 counts

measurements.

count,

two counts,

clock

and the

Assuming

coincidence,

and

one

count

representation

time

is often

to be

averaging

these

on and off

nanosecond

nanosecond.

to be

is

made

case,

a ten

clock

will

Since

sometimes

repetition

a uniform

two

90% of

interval

difficult

measured

(which

of

time),

number

of

measurements

for

1000

averages,

1000

times

clock,

For

measured

and the

results

nanosecond

occur

during

would

be

expected

the

counter

it

registers

depending

rate

counts

of

averaging

to determine.

is

the

this

one

are

time.

example.

reduces

variable

turns

time

discrete

to

before

it

is

example,

is

1 1

on

the

of the

random

recorded

Figure 2-7

the

counter

interval

averaging

measurements,

obtain

the

possible

counter

the

final

to obtain

assume

nanoseconds.

are

totaled

clock is

the

cannot

used.

measurement

to occur during

record

one

count

timing

between

interval

distribution

10% of

shows

inaccuracies,

The

period of the

in

calculating

main

final

main

answer

that

The

1000

1.1

a

and

to be

of

the

INPUT T. 1.

INTERNAL

CLOCK

GATED

COUNT

OUTPUT

REGISTER

-

-11

*

1STMEAS,

TO I

1 COUNT

OF THE TIME

90%

ns

lO.ns*

RECORDED

EXAMPLE

DISTRIBUTION OF

ASSUMES

2NOMEAS.

2 COUNTS RECORDED

10% OF

UNIFORM

TIMING

THE

TIME

RANDOM

COINCIDENCE.

//

//_

7

/

//

lOOCTH

TOTAL

COUNT

MEAS.

NOMINAL

1100

Fig. 2-7.

2-8

Graphical raprasantation

tima

of

intarval avaraging.

REV.

A, SEPT.

1977

Operating Instructions—

7D15

standard

distribution

range

time

of the

given

deviation.

example,

for

a

interval

graph

of the time.

50%

2-8.

where the time interval

Compare

graphs for 10.1

interval of

time

of 11

represent the range

Another variable

curve

ns

1

is the

Figure

interval

distribution

shown in

graphs

of an 11 ns

The

times.

graphs show

answer near 1

time

taken.

It should be noted

uniform random

distribution of time

input time interval

answer may be given;

vary,

usually acceptable.

is

but is

wrong.

A probability

this graph with the probability

ns

or 15 ns. Readings in the

that can change

number of averages

2-9

that is averaged

that

increases with

that the

and clock is

Figure

see

distribution graph for the

1

ns, is

is

1

ns

and 15

10.1 ns

ns. The probability

is

narrower

than

shaded

of answers

represent the probability

the

probability

the number of averages

that may be

the shape

taken.

and 1000

100,

10,

of obtaining an

previous examples assume

coincidence.

synchronized

2-10.

The answer does not

erroneous

an

shown

for

area

of the

The

curve

If the

Anything short of pure synchronization

a

9.9

10.1 10.2 10.3

10.0

10.4

10.5 10.6 10.7 10.8

10.9 11.0

RANGE OF ANSWERS (ns)

a

synchronization is

If

comparing the repetition

measured

triggering the

with the

oscilloscope with

and observing the

suspected, a check can

rate of

clock rate. This can be done by

7D15

the

signal.

CLOCK

OUT

the time interval

7D15 PSEUDO

Since

Clock positions are synchronized with each

purpose

Synchronization is indicated by

drift.

The

by calculating

average measurement (Tj^ggj) by the

^

•Tafias

Second, observe the

cycle

Generally,

less

than

Example:

100 kHz

a clock

of

display,

lower clock

a

rate position can be used.

display with little

a

amount of acceptable drift can be determined

the time needed

_

Number of

Repetition rate of measured

waveform

of drift.

Correct

synchronization will not

Tpp,ggj

A

is being measured and averaged

of

10 ns.

for the time interval

time interval

make

to

following:

averages

and measure the

occur

with

a repetition rate of

1000 times,

be made by

to

GATE

all the

7D15

for the

other,

or no

time interval

a

interval

time

time of

actually used.

if

this figure is

first,

one

using

be

10.5 10.6

10.4

.0350

.0325

.0300

.0275

.0250

.0225

^

t:

.0200

£

.0176

.0150

§

c

o-

.0125

.0100

.0075

.0050

.0025

.0000

14.4 14.5 14.6 14.7 14.8

10.7 10.8

RANGE

10.9 11.0 11.1

OF

14.9

RANGE OF ANSWERS (ns)

ABOVE EXAMPLES ASSUME A UNIFORMLY

THE

BUTION

OF TIMING

COINCIDENCE.

ANSWERS (ns)

15.1

15.0

11.2

11.3 11.4 11.5

15.2 15.3

RANDOM

15.5

15.4

DISTRI-

1432-15

1000

REV.

^meas

SEPT. 1977

A,

100 kHz

10 ms

Fig.

2-8.

Probability

versus time interval.

2-9

Operating

lnstructions-7D15

RANGE

OF

ANSWERS

(ns)

The

CLOCK

an

amplifier

PSEUDO

clock

cycle

Since

rate

is

noted.

^0

10/is

Tp^gg^

GATE.

is

ns

synchronization

To

eliminate

input

signal

instability

frequency

these

distribution

to

(two

methods

of

OUT signal

plug-in

To

changed

This

drift

^

(10 ms)

is

not

a

synchronous

repetition

the

input

or

three

allow

time

coincidence.

is

unit.

present

to

rate

1

.5

is

greater

a

problem.

rate,

ppm

the

viewed

The

10)us.

is

seconds

introduce

signal,

is

counter

on

the

display

a

usable

A

drift

corrected

than

the

relationship,

or

alter

usually

to

seek

oscilloscope,

is

triggered

display,

of

1.5

by:

1

.5 ms

drift

rate

some

type

the

7D15

adequate).

a

true

with

the

seconds

(1.5

change

of

Any

random

using

the

7D15

per

ms),

the

phase

clock

of

PROBABILITY

THE

ABOVE

BUTION

10.4

10.5 10.6 10.7

EXAMPLES

OF

TIMING

Fig. 2-9.

10.5

10.6

Probability

10.7

10.8 10.9 11.0

RANGE

10.8

RANGE OF

ASSUIVIE

COINCIDENCE.

versus

11.1

OF

ANSWERS

10.9

110 11.1 112

ANSWERS

A UNIFORIV1LY

number

of

11.2

(nsl

(ns)

RANDOM

averages.

11.3 11.4

11.3

11.4

DISTRI-

1432-16

11.5

Selective

by

using

oscilloscope

the

ARM

measured.

for

complete

Introduction

These

procedures

and

controls

checking

the

Preliminary

Install

the

7000-Series,

scope

Vertical

proper

settings.

install

a

compartment

switch

throughout

display.

to the

Time

Interval

time

interval

the

delayed

gates

Refer

7D15

to

choose

to the

A

gate

oscilloscope

information

OPERATION

demonstrate

of

the

7D15,

basic

operation

Setup

7D15

into

readout-equipped,

Mode

and

7B-Series

and

proper

the

procedures

set

time-base

the

setting.

Measurements

measurements

ARM

and

can

be

used

the

portion

and

concerning

AND

and

of

a

vertical

Trigger

oscilloscope

to

obtain

gate

CHECKOUT

the

use

also

the

instrument.

compartment

oscilloscope.

Source

unit

Adjust

an

are

B

ARM

in

conjunction

of

a

waveform

time

outputs

of

the

provide

Set

switches

into

Horizontal

the

time-base

optimum

made

gates.

base

manuals

available.

connectors

a

means

of

the

oscillo-

a

horizontal

triggered

possible

The

with

be

to

of

any

to

the

Mode

unit

2-10

@

INPUT

TIME

INTERVAL

Operating Instructions—

7D 15

INTERNAL

CLOCK

GATED

OUTPUT

TO COUNT

REGISTER

1.

Set

2.

and

A

3.

SLOPE

—

_

the

B

V.

controls

7D15

TRIGGER

COUPL

SENS

4.

LEVEL

SOURCE

DISPLAYED WAVEFORM

Switch

Fig.

2-10.

follows:

as

COUNTS

3

Results

of pure synchronization

DC

.1

V

PRESET

INPUT

B

PSEUDO GATE

J

1.

ANSWER

GIVEN

between the clock rate and

2.

3.

To

measurements, do not

Event Counter

MODE switch

ns

IS 30

obtain the

the

Set

7D15

to

input

total time

FREQ

COUNTS

3

time

interval.

NOTE

reset counter.

GATE

switch

B.

of

a number

OFF and set

to

J

1432-17

of

time

the

Manual

MODE switch

interval of 1

DISPLAY control

switch to start

button to

Stop Watch

Set the

Select

7D15 GATE

to PERIOD A.

the desired counting

ms can be observed

Turn

the

The

7D15

reset

the

STORAGE

to

is

ready

and

stop the

counter.

switch to

interval

easily).

switch to OFF and the

to count. Use

counter.

@

OFF

the

GATE

Push the

and

(a

the

set

counting

ON OFF

RESET

the

Turn

signal

1 kHz

operation).

event

controls

determines the

shown on

Period

AVERG

CLOCK

be

to

oscilloscope

the GATE ON OFF

Use

counter. If

obtain

to

the

Measurements

1. Set

the

switch

STORAGE

counted

length of time that the digital

CRT

7D15

to

the

to

the

to

calibrator

necessary,

proper

triggering.

before the counter resets.

MODE

the GATE switch

XI

,

desired resolution.

to OFF

Input connector

B

signal may be used

switch

to

adjust

The DISPLAY

switch to PERIOD

connect the

and

and stop

start

the

to NORM,

TRIGGER

B

0.4 V,

(a

show

to

control

display

A,

and the

2-11

the

is

the

.

2.

Operating

TIME

connector and adjust

triggering.

Instructions—

the

3.

Set

control

STORAGE switch

the

to

Connect the signal

Observe the

7D15

desired

the

A TRIGGER

PSEUDO

repetition

be

to

to ON

measured

and the DISPLAY

rate.

to the

controls for proper

GATE display on

CRT.

NOTE

The CLOCK OUT signal may be used as the A Input

2.

Signal

OUTsignal

show operation. The period

to

is selected

Period Averaging

1

1.

Follow

the

by

procedures for

CLOCK

Period

of

the CLOCK

switch.

Measurements.

A

Input

the

NOTE

The

signal

CLOCK

to show

signal may

OUT

operation. The

be used as the

CLOCK OUTsignal is selected by the

i.e., with the

Input,

TIME

switch

the

7D15

Frequency

1. Apply one of the

CLOCK IN connector using one of the

3.

the 7D15. This signal is usually

other

signal is compared. Move the internal

toward the rear of the plug-in

4.

position,

to

see

qualified service personnel.

CLOCK OUT signal connected

the

CLOCK

set for a 1 second

will

read

Ratio Measurements

Fig.

"10000.000

2-1

1 .

switch

signals

Rafar

set

to

intarnal

measurement interval

kHz

be

standard

a

to

B Input

frequency of

CLOCK switch,

the

to

100

to

ns, and the

1000 ms".

compared

cables supplied with

the

to

to which

Clock switch

the External clock

switch changas

Clock

.

the

B

EXT

the

Set

desired,

through

set

switch

the

7D15

count.

Frequency

Set

switch to

AVERG switch

i.e.,

with the

ohm terminator

a 50

ns, and the

to 10

digital

Measurements

the 7D15

NORM,

measurement interval.

2. Set

TIME switch

3.

connector

triggering.

the

STORAGE

the desired repetition rate.

to

Connect the signal

and adjust the

the number of averages

to

CLOCK

AVERG switch set

display will

MODE

the

to

be

switch

OUT

Input, the CLOCK

A

"10.00

FREQ, the GATE

to

signal

ns

connected

X1000,

to

1000X"

and the TIME switch to the desired

switch

be

to

measured

to ON

and the

to

DISPLAY

the

B Input

B TRIGGER controls for proper

±1

2.

5.

AVERG

Set

switch

MODE switch

XI.

to

the

Connect the second signal (the

pared)

controls

to

for

the

Input connector. Adjust the

B

triggering.

proper

The numerical readout

of the

CRT

indicates

EXT CLOCK IN

To obtain greater

can

be

used to

or 1 000. However,

tions will

the CRT

incorrect.

be

readout

For example,

AVERG switch

10.00000:1.

the

signal.

resolution, the TIME

divide

the EXT CLOCK IN

the decimal

To obtain the

the

by

correction

the

CRT reads

is

to XI

set

ratio

FREQ

to

located

of the

point for

correct

factor given in

10000.00

0. The

and the TIME

signal

on the

Input signal

B

AVERG

signal

these

answer,

and

corrected

be com-

to

B TRIGGER

upper portion

the

to

switch

by

100,

10,

switch

posi-

multiply

2-1

Table

the TIME

readout is

2-12

Fig. 2-11. Internal/External

clock

switch.

REV AUG

1432-18

1981

Operating

instructions—

7D15

TABLE

Decimal Point

Frequency

AVERG

TIME

Switch

Position

XI

XIO

X100

X1000

TIM WIDTH and

Ratio

7D15

Readout

0.0000

00.00

0.000

0.0000

TIM

WIDTH

ments

1, Set the

AVERG

be

to

CLOCK

2. Set the

TIME

averged.

control

7D15

switch

to the desired number of measurements

Set the

switch

to the

STORAGE switch

the

to

MODE switch to TIM WIDTH

GATE

desired resolution.

desired repetition

NOTE

The oscilloscope

Inputs to

B

V Calibrator signal to the A Input and set

0.4

SOURCE

the 7D15

0,

±

set

calibrator

CLOCK

XI

10X"

Calibrator

show operation, i.e., connect a

switch to

to

the outward position.

and

10ns

digital

accuracy.

the AVERG

display will

APPLICATIONS

Your

flexible

bilities of the system depend upon

plug-in

and accurate measurement

described in

in

units. The overall system can also

applications

Tektronix Field

making

specific measurements with this

and

7D15

units selected.

the

not

7000

manuals

described in these manuals.

Office

Series

Specific

the

of

or Representative

2-1

Chart

1

Correction

Factor

XIO^

X103 X103

Corrected

Readout

0.0000

000.00

000.000

X103 000.0000 : 1

Averaging Measure-

switch

may

to NORM

to ON

and the

rate.

DISPLAY

be used as the A and

With

switch set to

"1000.000

be

Oscilloscope provide

system. The

the mainframe

applications

and

mainframe and other

be used for many

Contact your

for

assistance in

instrument.

A, and

and the

1 kHz,

the

ps

capa-

other

are

plug-

:

to

also

measurements

Width

amplitude of the pulse.

width

any amplitude

at

monitoring the channel A

This pulse has

1 V, the

set to

a 5

trigger level should

A TRIG LEVEL jack of

1

Mainframe

Vertical Mode

Horizontal Mode

Trigger Source

B

Time Bate

Time/div (7B80)

Triggering

Vertical Amplifier

Display Mode

Trigger

Source

Volts/div

7D15

Mode

Averg

Clock

Gale

Displayed Waveform .

Trigger

Level

Slope

Coupl

a

Fig.

Figure

width of

Using trigger

measurement

Source

2*12. Equipment

2-13

shows

a noise spike

arming,

only

are generally made

For an exact measurement of pulse

level,

TRIG

amplitude. With the P-P

V

the trigger

set

LEVEL jack

be set for an output at

-1-0.25

V.

Lett Vertical

TIM

width A

.

. .

setup for typical width measurement.

the equipment

that is

the

7D15 is

after the

logic

Pseudo Gate

.

. . . 50%

setup

appearing

set

signal

Amplitude

Input

in

make

to

has gone

the

at

with

SENS

level

DVM.

a

control

50%

the

Alt.

B

1

Ch

1

Ch

V

2

X100

10

ns

Norm

+

DC

A

1433-02

to measure the

a logic signal.

the

width

low.

by

MEASUREMENT

A mode pushbutton on

width directly. Only

pulse

is used in this measurement.

setup to

1

0 ns clock rate and XI

maximum

measure the width

accuracy and

GATE

indicates

Pulse

Width

The

TIM

you to

triggering

measure

shows the

clock

pulse.

average

display

interval.

REV A

JAN 1981

TIMING

WIDTH

circuit

equipment

The

provides

of

the

PSEUDO

the

7D1

allows

5

the

channel A

2-12

Figure

of

TTL

a

000 measurement

resolution. The

the

measurement

Connect the

connector

Variable Time/DIV

beginning

logic signal and

duration

position and width

7D15

positive-going transition that

of

will

delayed sweep

the

of

7D15. The Delay Time Multiplier

control can

the arming

of

the

low

capture

to

gate after the falling

keep

the trigger

level.

The

of the arming

and

measure

output to the A ARM

the

and

now be used to position

edge of

circuit

intensified zone indicates the

gate.

the

occurs

armed for the

With this setup, the

width

of

after

it is armed.

the the

the first

2-13

Operating Instructions—

7D15

Mode

Averg

Clock

Gate

Displayed

Trigger Level

Slope

Coupl

Source

Mainframe

Vertical

Horizontal Mode

B

Time Base

Time/Oiv Time/Div

Triggering

B Delay

Vertical

Ch 1 and 2

Display

Trigger Source

2-13.

Fig.

Waveform . .

Mode

Trigger Source

(7000) (7B85)

(7B80)

(7B85)

Mode

Amplifier

Volls/Div

Mode

Equipment set

15

7D

Gate from Rear Panel

TM width

X1000

.

. B starts alter

.

. .

50%

True Gate

Amplitude

Norm,

Input

AC.

AC,

up for transient measurement.

10 ns

Norm

DC

ALT

Ext

delay

Ch

Pulse Period

the

Using

PERIOD A MODE pushbutton. The

now read out on the CRT. Merely

controls

falling

meet your

to

Since

measurement

accuracy

A

+

A

Int

1

1433-01

As with pulse width

necessary to measure

useful though when

signals where

given

clock cycle.

Time Between

The

measurement,

width

measurement of a

the measurement

events.

same setup as shown in Fig.

trigger the counter either on the

to

edge of the pulse.

specific

the

signal being

averaging is

and resolution.

pulse

a

Non-adjacent

ability

select

to

as was previously

The

trigger level can

measurement

measured is repetitive,

selected to obtain maximum

measurements,

the period

looking

at data pulse

may or may

a particular

noise spike,

of the time

Events

pulse in a

2-12,

press the

period measurement

the A

set

TRIGGER

leading

adjusted

be

requirement.

trigger

arming is not

of

signal.

a

not

be present during

illustrated

can

between

Arming is

trains or other

train for

pulse

by the

also be applied

non-adjacent

is

or

X1000

a

pulse

to

The 7D15 can also

events. Figure

destruction test made with

2-14

7D15. The width

simultaneously

event occured

Fig.

2-14.

test.

Waveform

with the

once, the arming

measure the

shows the

of this

and width

2-14

width of single-shot

waveform photograph

a storage

displayed pulse

storage of the display.

measurement

oscilloscope and the

was measured

gate was not

readout

for destruction

Since

required.

of

the

Figure

interval

memory

trigger the

2-15

measurement on

device. The origin

A time

used to arm the

delayed

ARM

sweep

connectors

Once a stable

made

between any

adjusting the

position and

sweep

gate). The Delay Time

the position of

and thus the

time

base Variable

delayed

the

edge of the

circuit.

ARM

disarmed,

sweep

gate, or the

The

delayed

inputs, A trigger

and

shows the equipment

a serial

pulse in

base. The delayed

counter's trigger

is

gate

connected

because the TIM

display

trigger levels

width of

the leading

point

vice

is obtained,

two

points on the

and

the

intensified

Multiplier

edge

of arming

the

Time/Division

gate and

sweep

versa.

point

is

thus

of

gate

armed

word train

this

sweep

circuits.

to both the

A^B

models

measurements

waveform

slopes, and

zone

control

of

the

delayed

A

TRIGGER

control

the

position

arming

during

is

applied

for the

the

setup for

from

case is

used

gate is

In this

case, the

ARM

A

being

merely

by

adjusting

(the

delayed

determines

sweep

circuit.

sets

the width

of

the falling

B

TRIGGER

the A

to

time B trigger

JAN 1981

@

a time

a disk

again

and B

used.

can

be

by

the

gate

The

of

and B

is

to

Operating

Instructions—

7D15

Disk

Memory

Original Pulse

Trig In

to Ext

7015

Mode

Averg

Clock

Gate

Displayed Waveform

Trigger Level

Slope

Coupl A & B

Source

Mainframe

Vertical Mode

Horizontal Mode . . .

Trigger

A

A & B

Source . .

Delayed

Sweep Gate

from Panel

.... Tim A— B

. Pseudo Gate

.

50%

X100

10

Norm

Amplitude

A

B-

+

.

inpui

.

. Alternate

. .

Vertical Mode

DC

ns

A

Rear

When making adjustments to your

resolve small

7D15 is not

changes in risetime easily. However,

recommended

for

measuring

circuitry, you

risetimes faster

than 125 ns.

The

ability

LEVEL jacks

measurements

used

trains.

Figure

risetime of a clock pulse

the

flip-flop which requires a clock pulse nsetime of 1

is a

from

separate trigger

two

exact trigger

to set

allows

with

select a particular

to

2-16

shows the equipment setup for measuring

the

0.6

V level

you to

the unit.

to

circuits of the 7D15 and

levels through the two

very

make

accurate

Again, trigger arming

pulse in non-repetitive pulse

it is input into a

as

flip-flop This

the 5.4 V level.

The TRIGGER SLOPE controls in this measurement are

both set

DVM

a

level for

trigger

TIM A—B

directly on the CRT.

To set the

to(+).

to

one TRIG

0.6

iViuUc pu&iibwaon press'*^

TRIGGER LEVEL controls, connect

LEVEL

V

B trigger levei fur

and

jack

at a

time, and

5.4

the

risetime is

V.

set

With

can

the

TRIG

risetime

can

be

ns

50

the A

the

read

Time

Base

Main Time/Div

Delayed

Time/Div

Triggering

B Delayed Mode

Vertical Amplifier

Display Mode Ch

rigger

T

Source

Volts/Div

2-1

Fig.

adjacent events.

measure

in the display

waveform

display

counter's actual

readout

Equipment setup for measurement

5.

In this example,

the time

photo

(upper

the counter

between the

and the

in Fig.

trace), the

leading edge

measurement

of the actual

measurement.

2-15

ment averaging improves the

measurement.

(0.00036%).

Time

Between Two

Risetime,

levels, or the

level

to another,

A—B mode.

risetime

not changing,

this eliminates

and

measurements

then count

the time between the

time required for

For

accuracy

The

Voltage

can easily

example, if

where

each risetime

the

need

to carefully position the waveform,

divisions

on the CRT.

.

,

Chi

1433-04

of

time between non-

arming

f alii ng edge

gate

of

the

of

the last pulse.

shows the analog

PSEUDO

GATE display of the

period (lower trace), and the

The 100X measure-

accuracy

in this case is

and

resolution

within 4 ns

Levels

10% and

transducer to rise from one

a

are

1 0%

from

making

and

acquired

be

you

the

is digitally read

90%

the 7D1

a series

90%

on the CRT;

out

1

is

set

first pulse

The

waveform

of the

pulse

TIM

5

of

levels are

DLY

CM A

4 B

A

CH

to

TR(G

D

n

Delayed

Sweep

Out

Gate

7D16

Fig.

2-16.

Mainframe

Vertical

Horizontal Mode

A Trigger Time Base

Main

Triggering

B Delayed Mode

Vertical

Display

Trigger

Volts/Div

Mode

Averg

Clock

Gale

Displayed Waveform

Trigger

Level

Slope A&B

Couple A

Source

& B

Mode

Source

Time/Div

Ampllfiar

Mode

Source

Equipment

Mtup for risetime

A—

Tim

XI

10 ns

Norm

Pseudo Gale

A ,6V,

B

Input

Alternate

Vertical

Left

Independent

Ch

Ch 1

1433-05

measurement.

000

5.4V

DC

B

+

A

1

1981

JAN

@

2-15

Operating

accuracy

Instructions—7D15

In this case

is

This method

slower

times

fall

90%

sweep

ARM

the 10%

at

point.

delayed

and B

trigger

the

(TIM A^B)

risetime to

one

Propagation

two

The

make

to

you

Figure

easily.

measure

through

the

seven

risetime

the

within

2

can be

than

must be

gate)

connectors.

point and the B

Now a

can be done

the other.

Delay

inputs to

signal

propagation

2-17

shows

propagation

TTL gates.

measurement

1.3%.

or

ns

easily

ns. The

1

25

Set the

typical time

moving the

by

the

delay

the

delay

for measuring rise

used

trigger arming gate

connected

to

A trigger level

trigger

interval

intensified

trigger

7D1 5

measurements

equipment

of

clock

a

is 1 55.60 ns.

both the

level

A ARM

control to

control

measurement

zone

circuits

quickly

required to

setup

signal as

it

The

and

(the

for

from

allow

and

passes

In this setup,

the

channel

7D15;

vertical

SOURCE

trigger

from

each

respective

because

1 of

delayed

the

amplifier

INPUT B

for

signal

the channel

trigger

Trigger

circuit

input connector.

arming is

channel B must know

with respect to

sweep

trace

Now adjust

rise

gate to

With the

oscilloscope

sweeps,

the

of the undelayed

undelayed pulse.

the

CRT. The

measurement

undelayed

the

pulse

channel

amplifier and

is

vertical

and

pushbutton

channel B.

A input

(in

receives

required

the undelayed

trigger arming

both

vertical mode set

trigger

on the

intensified zone

pulse

propagation delay is

The

is connected to both

pulse

channel

connected to

of the

B

determines

When

out,

TIM A-*B

the

its

for this

which

pulse.

channel 2 of the

7D15.

the source

receives its

it

trigger

pulse to

Connect

input jacks.

undelayed pulse

it begins

that

so

and ends before

in this case is

A of

The

7D15's

signal

mode).

then

When in,

from

signal

measurement,

trigger on

delayed

the

alternate

for

(channel

before

rise of

the

read out

ns.

76.60

the

of the

its

1).

the the

on

Clock

Input

7015

Mode

Averg

Clock

Gate

Displayed

Trigger Level

Slope

Coupl A & B

Source

Mainframe

Vertical Mode

Trigger Source

A

& B

Waveform

Output

50%

Tim

Pseudo

Amplitude

Alternate

A—

XI

000

10

Norm

Gale

DC

Input B

Left

maximum

For

controls

be

the

voltage to

Phase

level

divided

If

(5

5.55

phases

50

Out

B

ns

+

measurement

SOURCE

input

LEVEL

circuits

should be set

obtained

TRIG LEVEL

each jack.

Shift

determine

To

the

on

conversion

by a

period of the

the

MHz),

ns/degree.

measured as 50

is

ns/5.55

Figure

2-18

propagation

each

INPUT B

connectors. Both

controls are set to

will trigger

accuracy,

for the same voltage

either by

measuring

jacks with

phase, the

leading and lagging

signal (as

Time/Degree

If the

ns/degree

shows

phase

of the

delay

trigger

pushbutton is

on the

both the

the voltage

or

a DVM

time between the

signals is

(Time/Degree). For

factor

measured

conversion factor

time interval

the phase

ns,

=

9.09°

of phase

equipment setup for the

the

shift of

measurement, one signal is

input of the 7D15. Again,

channel A and

the

preset,

zero crossover

TRIGGER

applying

by

measured and

with 7D1

between the two

difference is thus;

shift.

signal.

MHz

a 5

pressed

which

to

means the trigger

point.

level.

levels

LEVEL

can

This

through

desired

the

same voltage

example.

is

2

5)

is:

/us/360°

2

the

Like

the

enable both

B TRIGGER

^rs

Time

Base

Main Time/Div

Delayed Time/Div

Triggering

Trig Runs

Delayed

Amplifier

Vertical

Display Mode Trigger Source

Volts/Div

2-17. Equipment setup

Fig.

for propagation delay

2-16

After Dly

Time

Alternate

Ch

1433-06

1

measurement.

Trigger arming is

Merely

channel

the

measurement

crossover

75.60

13.8°.

trigger the scope

1 . This assures that the

The

CRT.

pseudo gate display indicates that the

is being

points.

ns for phase shift of 75.6

not required for

on the

this measurement.

negative-going

pseudo

gate

display is

made between the

In

this case, the time measured

ns/5.55

ns/degree

slope

two

(3) JAN

of

on

zero

is

=

1981

.

method of

This

single-shot

0.075°,

and

this accuracy;

2.

1

Amplitude

the 7D15 to

amplitude

3.

4.

signals

signals.

Relative

should be

Noise

circuits

ultimately

prematurely causing jitter in the measurement,

affecting

Frequency of the

results, is 60

best

measuring

repetitive

or

respectively,

of the two

detect

signals,

the

phase

with accuracies of 0.1

Several

kHz.

at 35

signals—

zero

it is more difficult

crossover point on

be

factors

shift can

amplitude of the two signals—ideally both

the same amplitude.

on the signals —noise

may fire

the trigger

the resolution of the readout.

Hz

signals

to 50

the frequency range,

—

MHz.

used for

25°

affect

for

low

for

7015

Mode

Averg

Clock

Gale

Displayed

Trigger Level

Slope

Coupl A A

Source

Mainframe

Vertical Mode

Trigger Source

Time Base

Main Time/Div . .

Triggering

Vertical

Display Mode

Trigger Source

Volts/Div

Waveform

A&B

Amplifiar

B

Operating

Instructions—7D15

A—

Tim

B

1000X

ns

10

Norm

Gate

Pseudo

Preset

+

AC

B

Input

Alternate

Left

ALT

Ch 1

1433-07

2-18. Equipment

Fig.

setup for phase

measurement.

shift

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