Tektronix 7D11 Betriebsanleitung

Tektronix,

Inc.

P.O. Box

500

Beaverton, Oregon

97005

070

1377

·01

TEKTRONI»

7D11

DIGITAL

DELAY

SERVICE

INSTRUCTION

MANUAL

Serial

mber

873

DIGITALY REMASTERED

OUT OF PRINT- MANUAL SCANS

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Welch, MN 55089

www.artekmedia.com

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WARRANTY

All TEKTRONIX instrumenU are warranted against

defective materials and wor1<manship for

one

year.

Any

questions

with

respect

the

wlnlnty

should be taken up

with

your

TEKTRONIX Field Engineer or representative.

All requests for repair and replace

ment

parts

should be

directed

the

TEKTRONIX Field Office

representative

your area. This will assure you

the

fastest possibfe

service. Please include the instrument

Type

Number

Part

Number and

Se.-ia'

Number with

requests

for

parts

rvi

ce.

Specifications and price change privileges reserved.

@1973

Tektronix

, Inc., Beaverton, Oregon.

Printed in

the

United

States

America. All rights resel'Yed.

Content

thi

publication

may

not

be reproduced

any

form

without

perm

rss

ion

Tektronix, Inc.

U.s

.A. and Foreign TEKTRONIX

products

covered

U.S.

and foreign

patents

and/or

patents

pending.

TEKTRONIX

a registered

tradem.k

of Tektronix. Inc.

7011

Service

TABLE OF

CONTENTS

SECTION 1 OPERATING INFORMATION

Page

7011

FEATURES

1-1

PRELIMINARY

INFORMATION

1-1

Installation

1-1

Display

1-1

CONTROLS

AND

CONNECTORS 1-3

GENERAL

OPERATING

INFORMATION

1-3

Signal Connection 1-3

Count Mode 1-4

Trigger Controls 1-4

Triggered Light 1-4

Trigger Coupling 1-4

Trigger Source 1-5

Trigger Slope/Level 1-5

Events Start Trigger 1-5

Delay

Tim~

Events 1-5

Fine Delay 1-5

Sweep

Delay Mode 1-5

OUTPUT SIGNALS 1-6

Front

Panel

Output

Signals 1-6

Output

Signals

Mainframe 1-6

OPERATING MODES 1-7

Sweep

Delay 1-7

Echo Delay Time Mode 1-7

SECTION 2 THEORY OF OPERATION

INTRODUCTION

2-1

BLOCK

DIAGRAM

2-1

Time/Events Trigger

2-1

Phase

Lock Loop

and

Gated Countdown

2-1

Outputs Processing and Events Start Trigger

2-1

Delaying Counter

and

Display Generator

2-1

Readout Encoding

2-1

Service

TABLE

CONTENTS

(cant)

SECTION 2 THEORY

OPERATION (cont)

Page

THEORY OF OPERATION 2-2

TRIGGER

CIRCUITS<y

2-2

Trigger Preamp 2-2

Trigger Generator 2-3

PHASE LOCK LOOP

AND

GATED

COUNTDOWN<§>

2-5

Phase

Lock Loop 2-5

Fine Delay 2-6

Gated Countdown 2-6

OUTPUTS PROCESSING

AND

EVENTS

START

TRIGGER 0 2-9

Time/Events Count Source Gate 2-9

Delayed Trigger

Output

Flip-Flop 2-9

Delayed Gate Flip-Flop 2-10

Events Start Trigger

2-11

DELAYING

COUNTER

AND

DISPLAY GENERATOR 0

2-11

Voltage

Frequency Converter

2-11

Reversible Counter and Nines Complement Review 2-12

Delaying Counter 2-12

Power-On Initializer 2-12

Reset

2-13

READOUT ENCODING

<§>

2-13

POWER

DISTRIBUTION

AND

MAINFRAME

CONNECTOR 0 2-13

D.C. Inverter 2-14

INTRODUCTION TO THE READOUT SYSTEM 2-14

Introduction 2-14

The Readout System 2-14

SECTION 3 MAINTENANCE

INTRODUCTION

3-1

PREVENTIVE

MAINTENANCE

3-1

General

3-1

Cleaning

3-1

Lubrication

3-1

Recalibration

3-1

ii ®

REV.

FEB.

1977

TABLE

CONTENTS

(cont)

SECTION 3

MAINTENANCE

(cont)

TROUBLESHOOTING

General

Troubleshooting Aids

Troubleshooting

Equipment

Troubleshooting Procedure

REPLACEMENT

PARTS

Standard Parts

Transistor and Integrated

Circuit

Replacement

Recalibration

After

Repair

Special Parts

Ordering Parts

Repackaging

for

Shipment

SECTION 4

CALIBRATION

Calibration Interval

Tektronix

Field Service

Using This Procedure

TEST

EQUIPMENT

REQUIRED

General

Test

Equipment

Alternatives

Signal Connections

CALIBRATION

PROCEDURE

INTRODUCTION

Index

Calibration Procedure

Preliminary Procedure

DIGITAL

READOUT

DISPLAY

TRIGGERING

EVENTS

COUNT

MODE

TIME

COUNT

MODE

OUTPUT

SIGNALS

SECTION 5

ElECTR

ICAl

PARTS LIST

SECTION 6

DIAGRAMS

SECTION 7

MECHANICAL

PARTS

LIST

CHANGE

INFORMATION

Page

3-1

3-2

3-3

4-1

4-4

4-5

4-6

4-7

4-11

4-14

4-19

7011

Service

iii

•

7011 Service

lIIlGILER

7011

CIIU'UII

SOURCf

iii

_bILl

lIII

iii

'ilf

...

Ifb

iii

o;T

iii iii

DELAY

TIME

odYfITl

•

Y'O TRIG OUT

t.TV

INTO

fi.On

~;';:;:::;::

"'"

DIGITAl

DELAY

Fig.

1-1

1011

Oigi1~1

l~y

Section

1-7011

Service

OPERATING

INFORMATION

7011 FEATURES

The 7D11 Digital Delay plug-in

unit

designed

for

use

with

Tektronix

7000-series Oscilloscope mainframes

equipped

with

a readout system. The 7D11

uses

the

readout system

display

the

selected delay

count

the

CRT.

A delayed trigger

output

generated

counting

time

events. Digital delay

time

one second

read

out

in 100-nanosecond increments.

Additional

analog delay

time

from

zero

100

nanoseconds selected

from

cal

ibrated front-panel dial provides added resolution.

"echo"

time-delay mode provides a

divide-by-two

scaler

read

out

the

"one-way

trip"

time,

two

seconds,

for

radar ranging and

TDR

applications. Delay

time

accuracy

controlled

internal crystal oscillator; greater accuracy

can

be obtained

the

use

external one-megahertz

standard.

the

Count

Events mode,

the

CRT

readout

displays

the

integer number

events

from

one

events at

count

rates up

megahertz.

The 7D11

can

used

delay a 7B-series time-base

unit

in either a runs-after

triggerable-after delay

time

mode.

Other

features include on-screen display

delay

interval

vertical signal

display blanking, trigger

pickoff

from

vertical

amplifier

unit,

and blanking

the

two

leading zeros

(count

time

mode

only).

PRELIMINARY INFORMATION

Installation

The

7D11

designed

operate in any plug-in compart-

ment

Tektronix

7000-series mainframes. However, cer-

tain modes

operation require

the

be installed in

a specific

compartment.

The

unit

must

operated in a

horizontal

compartment

trigger

from

a signal applied

REV.

B. OCT. 1974

a vertical

amplifier

unit.

The 7D

must be operated in the

Horizontal

compartment

control

the delay mode

time-base

unit

in the B

Horizontal

compartment.

Operation

in a vertical

compartment

necessary

view

the

Delay

Interval Pedestal

without

the

use

external cables.

install

the

into

a plug-in

compartment,

push

the

unit

until

seated flush against

the

front

panel

the

mainframe.

remove,

pull

the

release latch

disengage

the

7D11.

Continue

pull

the

release latch

remove

the'unit

from

the

mainframe.

Display

The

7D11 readout display

presented

the

CRT

the

mainframe, along

with

information

encoded

the

other

plug-in units. Digital delay

time

(in milliseconds)

displayed in five

eight digits. The + symbol

the

right

the

digital

display reminds the

operator

add any

analog delay

time

selected

the

FINE

DELAY

(ns) dial

the delay

time.

The number

events being counted

presented in a

seven

eight

digit

display.

The

7D11 readout display appears

the

CRT

in a

location corresponding

the

plug-in

compartment

used.

The delay

time

number

events

will

be displayed in

the

top

division

the

CRT

graticule. The delay-time measure-

ment

unit

(ms)

will

be displayed in

the

bottom

division.

not

necessary

select

the

with

the

mainframe

Vertical

Horizontal

Mode switches

view

the

digital

display.

order

view the Delay Interval Pedestal

waveform, selection

with

the

Vertical Mode switch

required.

1-1

Operating Inform

ation

70ll

Service

4 5 6

TRIG

""'.

CIU'UtICii

SOURCE

I!l

I!I

UIIE

fi)

I!I

atllfMJ

III

I!I I!I

lXT

• •

fi)

Iil

1---

-'0+

• swn:p D

ELAY

DELAY

TIME

olEV

ENTS

,·2

!il_n

.mm

AflU

Oll

•

,",,"IMaLl

AfTlR

011A'

7011

DlV

INTEAVAlOUT

50n

--+;-

-18

DIGITAL DELAY

fill. 1·

7011

fronl

·panel

nlr

ols and

conneclor

CONTROLS

AND

CONNECTORS

The major controls and connectors

for

operation

the

7D11

are

located on the

front

panel

the

unit.

Two

controls located inside the

unit

for

auxiliary functions

are

described in the General Operating I

nformation

section.

The front-panel controls

and

connectors

are

identified in

Fig. 1-2;

their

functions

are

follows:

COUNT

MODE Switch

Selects mode

operation

and

clock-signal

source

for

Time

count

mode.

o B

SWEEP

DELAY

MODE Switch

Selects the delay mode logic

for

time-base

unit.in

B Horizontal compartment

mainframe.

TRIGGER

SLOPE/LEVEL

Controls

Select slope

and

amplitude

point

input

signal

where

the

delay

initiated.

TRIG'D

Indicator

Lights when a trigger

produced.

o COUPLING Switch

Selects the method

coupling the

input

signal

the Trigger circuit.

o SOURCE Switch

Selects Trigger

input

signal source.

EVENTS

START

TRIGGER

SLOPE/LEVEL

Controls

Select slope

and

amplitude

point

input

signal

where the Events Start count

initiated.

DELAY

TIME

OR EVENTS Control

Selects delay

time

number

events counted.

Direction

rotation

selects increase

decrease

in delay

time

number

events.

RESET

Resets

the

DELAY

TIME

EVENTS

0000001.

FINE

DELAY

(ns) Dial

Selects analog delay

time

added

digital delay

time

selected

DELAY

TIME

EVENTS

control.

Operating

Information-7D11

Service

G2J

DLY'D

TRIG

OUT

BNC connector

for

Delayed Trigger

output

signal.

(g]

EXT

MHz

EVENTS

START

TRIG

BNC connector

for

input

external 1 MHz

time·reference signal

input

Events Start

Trigger

input

signal. Connector

function

deter-

mined

setting

COUNT

MODE switch.

DLY

INTERVAL

OUT

BNC connector

for

Delay Interval

output

signal.

[!;]

EXT

TRIG

BNC connector

for

external

input

Trigger

circuit

(selected

SOURCE switch in the

external positions).

GENERAL OPERATING INFORMATION

Signal Connection

general, probes

offer

the most convenient

means

connecting signals

the 7D11 external trigger inputs.

Tektronix

probes

are

shielded

prevent pickup

electro-

static interference. A 10X attenuation probe offers a high

input

impedance and allows the

circuit

under test

perform very close

normal operating conditions. Also, a

10X probe attenuates the

input

signal ten times.

Tektronix

probes

are

designed

monitor

the signal

source

with

minimum

circuit

loading. The

use

a probe

will,

however,

limit

the maximum trigger frequency range.

obtain maximum trigger bandwidth when using probes,

select a probe capable

compensating the

input

capaci-

tance; observe the grounding considerations given in the

probe manual. The probe-to-connector adapters

and

the

bayonet-ground

tip

provide the best frequency response.

high-frequency applications, requiring maximum over-

all bandwidth,

use

a coaxial cable terminated

both

ends

in the characteristic impedance

the cable.

maintain

the high-frequency characteristics

the applied signal,

use

high-quality low-loss cable. Resistive coaxial attenuators

can

used

minimize reflection

the applied signal

has

suitable amplitude.

High-level, low-frequency signals

can

connected

directly

the external trigger inputs

with

short, unshielded

leads.

When this method

used, establish a common

ground between the 7D

and the associated

equ

ipment.

The common ground provided

the line cords

usually

inadequate.

interference

excessive

with

unshielded

leads,

use

a coaxial cable

probe.

1-3

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