Tektronix 7D20 Reference guide

Brand: Tektronix

Model: 7D20

Category: Microphone accessories

Type: Reference guide

Tektronix 7D20 is a programmable digitizer that allows users to capture, store, and analyze waveforms with high precision and flexibility. It features two vertical channels with variable sensitivity settings, allowing you to measure a wide range of signals. The horizontal sweep speed can also be adjusted, enabling you to capture waveforms at different time scales.

The 7D20 offers various triggering modes, including peak-to-peak, auto, and normal, giving you control over when and how waveforms are captured. The trigger source can be selected from either channel, the line frequency, or an external source, providing versatility in triggering options.

Tektronix 7D20 is a programmable digitizer that allows users to capture, store, and analyze waveforms with high precision and flexibility. It features two vertical channels with variable sensitivity settings, allowing you to measure a wide range of signals. The horizontal sweep speed can also be adjusted, enabling you to capture waveforms at different time scales.

The 7D20 offers various triggering modes, including peak-to-peak, auto, and normal, giving you control over when and how waveforms are captured. The trigger source can be selected from either channel, the line frequency, or an external source, providing versatility in triggering options.

GUIDE



070-

USER

3

Ό

5-

Ό

Ρ

42

TEK

PR

OG

R

A

MM

A

BLE

DIGITIZ

ER

Te

k

tro

n

ix

.

CO

MM

ITT

ED

TO

EXC

ELLEN

C

E

Intro

d

uction

T

h

is

r

eference

gui

de

is

inten

d

e

d

to

h

el

p α

user

to

o

p

erate

t

he

7D20

.

Settings

an

d

comman

d

s

are

explaine

d

briefly

and α

page

number

in

t

he

7D20

O

p

erator's

Manual

is

given

fo

r

obtaining

furt

h

er

information

.

Copyright©1982,

Tektronix,

Inc

.

All

rights

reserved

.

Contents

of this

p

ublication

may

not

b

e reproduced

in

any

form

without

the

written

p

ermission

of

Tektronix,

Inc

.

F

ront

P

anel

Settings

S

h

ift

F

unctions

2-92

f

:

S

h

ift

fu

n

ction

allows

access

to

functions

h

ig

h

lig

h

te

d

in

orange

.

Push

`f'

t

h

en

function

key

.

V

ertical

Am

p

lifier

2-92

V

O

L

TS/DI

V

:

Sets

vertical

sensitivity

in

1,2,5

se

q

u

ence

from

5m

V

/Div

to

5

V

/Div

.

V

A

R

IA

BLE

:

Continuously

variable

to

at

least

12

.5

V

olts/Div

.

CO

U

PL

I

NG

:

AC

;

P

rovi

d

es

AC

cou

p

ling

of

in

p

ut

signal

.

DC

;

P

rovi

d

es

DC

coupling

of

input

signal

.

G

ND

;

Sets

VZ

R

(

V

ertical

Zero

R

eference)

for

t

h

e

d

igitizer

.

I

NV

E

RT

:

Inverts

signal

connecte

d

to

C

h

annel

2

.

P

OSITIO

N

:

A

d

j

usts

position

of

trace

vertically

±

10 d

ivisions

from center

g

r

aticule

.

Time

B

ase

Controls

2-96

Τ

/

ΜΕ

/DI

V

:

Sets h

orizontal

swee

p

spee

d

in

1,2,5

se

q

uence

from

50

n s/Div

to

20s/Div

an

d

selects

ΕΧΤ

C

L

OC

K

.

P

OSITIO

N

:

Positions

waveforms

h

orizontally

.

Trigger

Co

n

trols

2-

ιο 3

S

L

O

P

E

:

T

r

igge

r

on p

ositive

(w

h

en

illuminated)

or

negative

slo

p

e

.

LEVEL

:

Sets

t r

igge

r

level

.

TR

IG

POS

:

A

d

j

usts

for

0

to

1500 d

ivisions

p

ost-trigger

.

TR

IG

POS

ρ

:

Ad

j

usts

for

0

to

10

d

ivisions

p

retrigger

.

Trigger

Source

2-99

MOD

E

:

Trigger

source

set

by

Ac

q

uire

Mo

d

e

.

CH

1

:

Triggers

on

C

h

annel

1

input

signal

.

C

H

2

:

Triggers

on

C

h

annel

2

in

p

ut

signal

.

L

I

NE

:

Trigge

r

s

on

mai

n

f r

ame

line

fre

q

u

ency

.

EXT

.

Triggers

on

exte

rn al

t r

igge

r

inp

u

t

(±1

V

max)

.

f,

ΕΧΤ

=10

:

Triggers

on

external

trigger

in

p

ut

wit

h

10

Χ

attenuatio

n

(±10

V

max)

.

Trigger

Cou

p

ling

2-

ιοο

AC

:

AC

coup

les

trigger

signal

(-3d

B

at

30H

z

nominally

.)

LF

REJ

:

AC

cou

p

les

trigger sig n

al

(-3d

B

p

oint

at

40

kH

z

nomi

n

ally

.)

HF

REJ

:

Sets

h

ig

h

fre

q

uency

(-3d

B

p

oint

at

40

kH

z

nominally

.)

DC

:

DC

cou

p

les

trigger

signal

.

Trigger

M

ode

2-

ιοι

Ρ

-P

:

Triggers

at

α

%

of

p

ea

k

-to-

p

ea

k

trigger

or

free

runs

w

h

en no

signal

present

.

A

U

TO

:

Triggers

on

a

d

e

quate

signal

level

or free

runs

.

N

O

RM

:

Swee

p

is

generate

d only

on

ad

e

q

uate

trigger

.

U

se

for

re

p

etitive

signals

below

30

Hz

.

H

O

LD

NEXT

:

Terminates

ac

q

uisition

at

en

d

of

next

waveform

ac

q

uisition

.

Acquire

M

ode

2-95

C

H

1-1

:

Ac

q

uires

signal

from

C

h

annel

1

V

ertical

into

M

emory

1

.

BOTH

:

Ac

qu

ires

signals

from

C

h

annel

1

an

d

C

h

annel

2

into

M

emories

1

an

d 2

res

p

ectively

.

ADD

:

Ac

q

uires

the

sum

of

C

h

annel

1

an

d

C

h

annel

2

into

M

emory

1

.

CH

2-2

:

Ac

q

uires

signal

from

C

hannel 2

V

ertical

into

M

emory

2

.

M

emory

Display

2- ιο

5

1-6

:

Disp

lays

contents

of

W

aveform

M

emories

1-6

.

CO

P

Y

:

Co

p

ies

co

n

tents

of

one

memory

into

anoth

er

.

εχΑΜΡτ

.

ε

:

`CO

P

Y

1-)6'

places

waveform

from

M

emory

1

into

M

emory

6

.

M

emory

Dis

p

lay

(cont

i

nued)

CS

W

:

Selects

cursor

waveform

.

EXAMPLE

:

'CS

W

3'

sets

W

aveform

3

as

t

h

e

Cursor

W

aveform

for

mo

d

ifying

an

d

ma

k

ing

c

ur

so

r

measurements

.

f,

REF

:

Wh

en

Cursor

W

avefo

r

m

is

ίη

'

ΝΜΑ

G'

or'

V

S,'

causes

unmag

n

ifie

d

ΥΤ

d

is

p

lay

of

Curso

r

W

aveform

.

Cursor

W

aveform

Controls

2-

ιο

8

VX

P

D

:

Curso

r

W

aveform

is

ex p

ande

d

to

t

h

e

next

more

sensitive

vertical

setting

in

1,2,5

se

q

uence

.

V

C

MP

:

Cu

r

sor

W

avefo

r

m

is

com

p

ressed

to

t

h

e

next

less

sensitive

vertical

setting

in

1,2,5

se

q

uence

.

HM

AG

:

Causes

α

ten

times

h

orizontal

magnification

of

t

h

e

Cursor

W

aveform

.

f,

HM

AG

A

LL

:

Causes

α

ten

times

h

o

r

izo

n

tal

magnification

of

all

store

d

an

d

d

isplaye

d

waveforms

.

VP

LI

P

:

P

ositio

ns

t

h

e

C

u

rsor

Waveform

u

p

war

d

on

t

h

e

C

RT

d

isplay

.

VP

DN

:

P

ositio

ns the

Cursor

W

aveform

d

ownwar

d

on

t

h

e

C

R

T

d

is

p

lay

.

VS

:

P

uts

7D20

in

X

-Y

mo

d

e

wit

h

t

h

e

Cursor

W

avefo

r

m

as

Υ

an

d

any

ot

h

er

waveform

as

Χ

.

EXAMPLE

:

Wh

en

VS

is

p

r

esse

d

,

`CS

W

1

V

S

#'

is

d

is

p

laye

d

.

T

h

e

user

t

h

en

enters

α

number

from

1

to

6

.

Cursor

Controls

2-

ιι

2

α

1

:



P

ositions

Cursor

1

to

t

h

e

left

.

1

C>

:



P

ositions

Cursor

1

to

t

h

e

rig

h

t

.

α

2

:



P

ositio

n

s

Cu

r

sor

2

to

t

h

e

left

.

2C>

:



P

ositions

Cursor

2

to

t

h

e

rig

h

t

.

f,

ΔΟΝ

:

Turns

on

Cursor

2

.

f

Δ

O

FF

:

Turns

off

Cursor

2

.

f,

I

ND

EP

:

Allows

eac

h

waveform

to

maintain

in

d

epen

d

ent cursor p

ositions

.

f,

A

LIG

N

:

Aligns

cursors

on

all

waveforms

to

t

he

c

u

rsor

p

ositions

on

t

he

Cursor

W

aveform

.

W

aveform

P

rocessi

n

g

Controls

2- ττ

5

SET

N

:



Determines

value

of

'N'

for

use

wit

h

`A

VE

'

an

d

`ENV'

controls

.

`

Ν

'

is

set

in

p

owers

of

2

from

8

to

256

.

A

V

E

: I

n

coming

signal

is

average

d

until

terminated by'

H

O

L

D' or

`

H

O

L

D

NEXT'

.

ENV

:

Continuous

envelo

pe

of

t

h

e

incoming

signal

is

d

is

p

laye

d

until

terminated by'

H

O

L

D'

or

`

H

O

L

D

NEXT'

.

f,

A

VE

Ν

:

Averages

`

Ν

'

waveforms

t

h

en

enters

H

O

L

D

.

W

aveform

P

rocessing

Controls

(Cont

i

n u

ed)

f,

ENV

Ν

:

E

nvelo

p

es

`

Ν

'

waveforms

t

hen

enters

H

O

L

D

.

H

O

L

D

:

Termi

n

ates

acq

u

isitio

n s

imme

d

iately

.

VE

CTO

R

:

Tur

n s

vectors

j

oining

ad

j

acent

d

ata

p

oints

ON

or

O

FF

S

p

ecial F

unctions

2- ι 2

ο

ID

:

Pr

oduces

α

s

p ecial

G

P

I

B

a n

d

i

n

strument

i

d

entificatio

n

menu

w

h

ic

h

is

use

d to

select

G

P

I

B system p

arameters

.

R

QS

:

Ge

n

erates

α

service

re

q

uest

(S

RQ)

.

f,

R

QS

#

:

Generates SR

Qs

wit

h uni

que

event

codes

.

P

us

h

R

QS#

and α

n

u

mber

from

1

to

6

.

PR

O

BE

ID

EN

TI

F

Y

:

P

us

h ing

t

h

e p

robe

i

d

entify

b

utton

on α Ρ

6053

Β

P

robe

will

gene

r

ate

an SR

Q

wit h

α

uni

q

ue

event

code

for

eit

h

er

C

h

annel

1

or

C

h

annel

2

.

M

enu

Driven

F

unctions

2-

α

3

P

ress

t

h

e

MEM

O

R

Y DIS

PLAY

buttons

to

ma

k e

t

h

e

menu

selections

.

MENU

:

Dis

p

lays

t

h

e

followi

n

g

me

n u

:

M

AST

ER

MENU

1,#

STO

RE

PANEL

#

2,#

RE

CA

LL

P

A

NEL

#

3,

DIS

PLAY

CA

LP

ATT

ERN

4,

U

TI

L

ITI

E

S

1,#

STO

RE

PA

NEL

#

:

Stores

t

h

e

current

front

p

anel

settings

in

α

user

selectable,

non-volatile

settings

memory

location

(1-6)

.

2,#

RE

CA

LL

P

A

NEL

#

:

R

ecalls

an

d

imme

d

iately

im p

lements

any

one

of

t

he

front

panel

settings

p

r

eviously

store

d

using

t

he

STOR

E

PA

NEL

f

u

nction

.

3,

DIS

PLAY

CA

L

P

ATT

ERN

:

Dis

p

lays

α

calibration

p

attern

on

t

he

C

RT

to

allow

corrections

to

t

h

e

7D20's

d

is

p

lay

p

resentation

.

P

ress

button

4

to

d

is

p

lay

t

h

e

following

U

tilities

Submenu

:

U

TI

L

ITI

ES

1

S

EN

D

CS

W

ASCII

2

SE

ND

CS

W

B

I

NA

RY

3

RE

ADO

UTON/OFF

4

ΕΧΤ

C

L

OC

K

P

O

L

A

R

ITY

5

IN

IT

FR

O

NTP

A

NEL

6

M

AST

ER

MENU

1

S

EN

D

CS

W

ASCII

:

Sen

d

s

t

h

e

Cursor

W

aveform

p

reamble

a

n

d

d

ata p

oints

to

anot

h

er

d

evice

in

L

IST

EN

ONL

Y

mo

d e

.

7D20

must

be

in

TALK

O

NL

Y

mo

de

.

Data

e

n

co

d

ing

is

ASCII

.

M

enu-Driven F

unctions

(Co

n

t

inu

e

d

)

2

S

EN

D

CS

W

B

I

NA

R

Y

:

Same

as

#1,

exce

p

t t

h

at

d

ata p

oints

encoding

is

b

inary

.

3

RE

ADO

UT

ON/OFF

:

Tu

r

ns

text

d

is

p

layed

on

lines

1,2

an

d

15,16

on an

d

off

.

L

ines

3-14 are

always

available

to

d

is

p

lay

me

nus or

text

.

4

ΕΧΤ

C

L

OC

KP

O

L

AR

ITY

:

Determines

w

h

ic

h

transition

(+

or

-)

of

t

h

e

E

xternal

Cloc

k

will

be

recognized

by

t

h

e

7D20

w

h

en

ΕΧΤ

C

L

OC

K

is

selecte

d

.

5

ΙΝΙΤ

FR

O

NT

P

A

NEL

:

Initializes

front-

p

anel

settings

to

t

h

e

following

con

d

itions

;

V

ER

TICA

L

VO

L

TS/

D

1

V

:1

CO

UPL

I

NG

:

AC

C

H

2

I

NVER

T

:

O

FF

T

R

IGG

ER

I

N

G

M

OD

E

:

Ρ

-

Ρ

H

O

L

D

NEXT

OFF

CO

UPL

I

N

G

:

AC

SOUR

CE

:

M

OD

E

S

L

O

PE

:

P

OS

P

OSITIO

N

:

0

H

O

R

IZO

N

TA

L

ΤΙΜΕ

/DI

V

:

l

ms

ΕΧΤ

C

L

OC

K

P

O

L

A

R

ITY

:

P

OS

MEM

O

RY

DIS

PLAY

DIS

PL

AY

1

:

ON

DIS

PL

AY

2-6

:

O

FF

CS

W

:

O

FF

CO

P

Y

:

O

FF

REF

:

O

FF

C

UR

SO

R

WFM

CS

W

:1

V

XP

D,VC

MP,VPUP,VP

DN

:

O

FF

HM

AG,

VS

:

O

FF

ACQ

U

ISITIO

N

ACQ

M

OD

E

:

CH

1

C

URSO

R

S

M

OD

E

:

A

L

IG

N

ΔΟΝ

:

O

FF

C

URSO

R

1

:

POINT

0

C

URSO

R

2

:

POINT

1023

OT

HER

A

VE

,A

VEN,ENV,ENVN

:O

FF

MENU,R

QS,

R

QS

#,ID,

H

O

L

D

:

O

FF

6

M

AST

ER

MENU

:

Dis

p

lays

t

he

M

aster

M

enu

f,

T

E

ST

:

Disp

lays

t

h

e

following

Test

M

enu

TE

ST

MENU

1

E

XE

C

UTE

S

ELF

T

E

ST

2

*CA

L

I

BR

ATIO

N

*

3* E

XTEN

DE

DT

E

ST*

4*

CI

RCU

IT

E

X

ER

CIS

ER

*

*S

ERV

IC

E

O

NL

Y*

All

selectio

ns

(ot

h

er

t

h

an

item

1,

SE

LF

TE

ST) are

for

q

ualifie

d

service personnel

only

.

W

arning

M

essages

2-88

T

he

following

warning

messages

are d

is

p

laye

d

in

t

h

e

P

rompt

F

iel

d

of

t

h

e

CR

T

0-10

T

P

OS

RE

QD

:

Dis

p

laye

d

w

h

en

R

O

LL

or EXTer

n

al

C

L

OC

K

mo

d

e entere

d

wit

h

α

negative

trigger

position,

wit

h

A

VE

or

ENV

active

.

In

d

icates

t

h

at

P

osttrigger

is

unavailable

.

H

O

L

D

RE

QD

:

Dis

p

layed

if

VPUP,

VP

D

N,

V

C

MP

or

VXPD

is

pus

h

e

d

w

h

ile

t

he

7D20

is

actively

ac

q

uiring

into

t

h

e

Cursor

W

aveform

.

In

d

icates

H

O

LD

mode

is

re

qu

ire

d

.

H

MAG,

V

S

RE

QD

:

Disp

laye

d

if

`REF'

is

push

e

d

w

hen

t

h

e

7D20

is

not

d

is

p

laying

α

M

agnifie

d

Cursor

W

aveform

o

r

is

not

in

V

S

mo

d

e

.

CS

W

RE

QD

:

Disp

laye

d

if

t

h

e

user

attem

p

ts to

turn

t

h

e

Cursor

W

aveform

d

is

p

lay off

.

T

h

e

CS

W

is

r

e

q

uire

d

at

all

times

.

UP

DAT

E

IG

N

O

RE

D

:

Disp

laye

d

after

an

attem

p

t

to

c

h

ange

any

of

t

h

e

p

arameters

in

t

h

e

ID

M

enu

w

h

en

t

h

e

7D20

is

in

t

h

e

REM

OT

E

-wit

h

-loc

kout

state

.

R

QS

O

FF

:

Occurs

w

hen

t

h

eR

QS

or p

robe

I

d

entify

button

is

p

us

h

e

d

an

d

t

h

e

R

QS

M

as

k h

as

been

turne

d

off

or

G

P

I

B

Service

R

equests

a

r

e

d

isable

d

.

T

h

e

following

E

rror

M

essages

are

all

d

is

p

laye

d

w

h

en

t

here

is

α

failure

i

n

t

h

e

Selftest

.

T

h

eE

A

R

O

M

F

AI

LE

Dmessage

is

also

given

w

h

en

t

he

RE

CA

LL

comman

d

is

execute

d

an

d

t

h

e

memory

calle

d

contains

invali

d data

.

R

efer

to

q

ualifie

d service

p

ersonnel

for

corrective

action

.

S

ELF

T

E

ST

F

AI

L

G

P

I

B

F

AI

LE

D

E

A

R

O

M

F

AI

LE

D

G

P

I

B

F

unctions

Selecta

b

le P

ara

m

eters

4-4

P

us

h

ing

t

he

`ID'

button d

is

p

lays

t

h

e

following

sp

ecial

f

u

nction

menu

:

S

ELE

CTA

BLE

M

OD

E

S

:

O

FF,

TA

LK

O

NL

Y,

L

IST

EN

O

NL

Y,

TA

LK

/

L

IST

EN

S

ELE

CTA

BLE

T

ERM

I

N

ATO

R

S

:

ΕΟΙ

,

LF

/

ΕΟΙ

S

ELECTA

BLE

ADD

RE

SS

E

S

:

0-30

G

P

I

B

ID

EN

TI

F

ICATIO

N

1D

ΤΕΚ

/7D20,(

r

om)

.(

p

atc

h

4

S

ELE

CT

M

OD

E

5

S

ELE

CT

T

ERM

I

N

ATO

R

6

S

ELE

CT

ADD

RESS

PRE

SS

ID

KEY

TOUP

DAT

E

A

ND

EXIT

NO

UP

DAT

E

IN

REM

OT

E

O

NL

Y

Selectio

ns are

ma

de

by

pus

h

ing

t

h

e

num

b

e

r

e

d

k

eys

in

t

h

e

MEM

O

R

Y

DIS

PLAY

function

grou

p

.

All

selectio

ns

will

be

im

p

lemente

d

w

h

en

`ID'

is

p

resse

d

to

exit

.

Command

F

ormat

:

4-

ιι

T

he

7D20

comman

d format

is

t

h

e

following

:

HE

AD

ER

/

L

I

NK

/A

RG

UME

NT

Comman

d

names

are

s

p

elle

d as

printe

d

on

t

he

front

p

anel

.

T

h

e

response

of

t

h

e

7D20

to

α

H

el

p

Query

(HELP?)

is

α

list

of

all

of

t

h

e

vali

d

comman

d

h

ea

d

ers

:

HELP?

CH

1,

C

H

2,

TR

IGG

ER

,HORIZONTAL,

DISPLAY,

COPY

CS

W

,AQ

R

,

C

UR

SO

R

,

STO

RE

,

RECA

LL, DT,

I

N

ITT

E

STCA

L

,

R

OS,C

ER

,

EX

R

,I

NR

,

E

X

W

,O

P

C,

U

S

ER

,

P

ID,

WFMPRE

,C

UR

V

E

,DATA,T

E

XTDEBUG,

RE

CO

R

DI

N

G,

LONG

FORM

H

eader,

lin

k

,

and

argument

names

may

be

abbreviate

d

as

long

as

t

he

abbreviations are

unique

.

T

h

e

following

exam

p

le

s

h

ows

t

hree

i

d

entical

G

P

I

B

comman

d s

:

T

R

IGG

ER

ΜΟ

D

Ε

:

Ρ

-P,

CO

UPL

I

N

G

:AC

HFREJ,

S

L

O

PE

:PLU

S

T

R

IG

ΜΟ

D

Ε

:

Ρ

-

Ρ

,

CO

UP

:AC

HFR

E

J,

S

L

O

P

:PLU

S

T

R

ΜΟ

:

Ρ

-,000

P

:AC

H

,

S

L:PL

M

ulti

p

le

comman

d

s

may

be

sent

in

α

single

string

p

rovi

de

d

t

hey

are se parated

by

α

semicolon

.

EXAMPLE

(

M

ulti

p

le

Command

string)

:

T

R

IG

SOUR

C

E

:

M

OD

E

;

DIS

P

1

:

ΟΝ

Comman

d

F

ormat

(Continued)

M

ulti

p

le

arguments

are

sep

arate

d by α

comma

.

EXAMPLE

(

M

ulti

p

le

arguments)

:

TR

IG

SOUR

CE

:

M

OD

E

,

CO

UP

AC

Queries

Q

u eries

solicit

information

from

t

h

e

7D20

.

T

h

ey

consist

of

α

h

ead

er

followe

d by α

'?'

or

α

h

ead

er

followe

d by α

`?followe

d by

α

label

.

EXAMPLE

(

H

ea

d

er

only

q

uery)

:

CH

1?

7D20

R

es

p

onse

:

CH

1

V

O

:2,

P

OS1

:-1,000

P

:AC,

VA

:ON

EXAMPLE

(

H

ea

d

e

r

a

n d

label

q

u ery)

:

CH

1?

V

O

L

TS

7D20RE

SP

O

N

SE

:

C

H

1

V

O

:2

Queries

may

be

abbreviate

d

using

t

he

same

guidelines

as

for

abbreviating

comma

n

d

s

.

L

O

NG

F

ORMON

Ι

OFF

sets

t

h

e

7D20

res

ponse

to

q

ueries

to

eit

h

er

abbreviate

d

or

longform

.

S

R

Q'S

4-25



STAT

U

S

B

YT

ES



DE

CI

M

A

L

F

ATA

L

ERR

O

R



227



243

POWER

ON



65



81

US

ER

RE

Q

UEST



67



83

EXE

CU

TIO

N

ERR

O

R



98



114

I

NT

ERN

A

L

ERR

O

R



99



115

E

X

ECU

TIO

N

W

A

RN

I

N

G



101



117

I

NT

ERN

A

L

W

A

RN

I

NG



102



118

O

PER

ATIO

N

CO

MPLE

TE



66



82

NO

STAT

U

S

TO

REP

OR

T



0



16

T

h

e

first

column

of

d

ecimal

values

are

generate

d

wit

hout

t

h

e

busy

bit

set

an

d

t

h

e

secon

d

column

is

wit

h

t

h

e

busy

bit

set

.

T

h

e

7D20

is

consi

d

e

r

ed

busy

if

i

n p

rocess

of

A

VEN,

ENVN,

or

H

O

L

D

NEXT

E

vent

Queries

(EVEN

T?

or

ERR

O

R?)

4-32

T

h

e

EVEN

T

Q

UER

Y

is

α

means

of

p

rovi

d

ing

d

etaile

d

information

as

to

t

he

nat

u

re

of,

or

t

h

e

reason

for,

t

he generation

of

α

Service

Re

q

uest

(S

R

O)

.

EVEN

T?

Is

res

pon

d

ed

to

wit

h

an

event

co

d

e

d

efine

d

below

.

EVEN

T#)

A

LLEV?

Is

res

p

on

d

e

d

to

wit

hα

list

of

all

p

en

d

ing

event

co

des

.

EVEN

T

(1

),~

2),

. . .

Event

Q

ueries

(Co

n

t

inu

e

d

)

EVQTY?

is

res

p

on

ded

to

with

t

he

number

of

p

en

d

ing

event

co

d

es

.

EVQTY

(#)

Define

d

E

vent

Co

d

es

:

CODE

DESCRIPTION

CO

MM

A

N

D

ERR

O

RS

108



Checksum

Error

in

Curve

Data

109



Illegal

Byte

count

Error

151



Symbol

or

Number

too

long

152



Invalid

or

Co

n

trol

Character

Input

153



Invalid

Special

Character

After

Escape

154



Invalid

Number

In

p

ut

155



Invalid

String

Input

156



Symbol

not

found

157



Syntax

Error

158



Invali

d

ΕΟΙ

159



Invalid

Delimiter

160



E

xpression

too

complex

161



Excessive

Binary

Curve

Points

162



Excessive

ASCII

Curve

Points

E

XECU

TIO

N

E

RR

O

RS

203



Ι

/

Ο

Bu

ffers

full,

Output

dum

ped

250



Not

in

HO

LD

mo

de

.

251



Illegal

Waveform

N

umber

252



Illegal

Settings

Memory

253



Illegal

Cursor

Number

254



Settings

RE

CA

LL

error

255



Dis

p

lay

R

eference

error

256



Turning

off

CS

W

display

error

257



Illegal

Data

Memo

r

y

N

um

b

er

258



RO

LL

mo

d

e,

A

VE, ENV,

negative

TR

IGG

ER

P

OSITIO

N

error

259



Waveform

Pream

b

le

illegal

Ν

R

.

ΡΤ

I

N

T

ERN

A

L

ERR

O

RS

331



S

ELF

TE

ST

failure

Mo

d

ule

1

332



S

ELF

TE

ST

failure

Mo

d

ule

2

330+

ΧS

ELF

TE

ST

failure

Module

Χ

(

Χ

=1-63)

394



S

ELF

TE

ST

com

p

lete

and

it

failed

SYST

EM

EVEN

TS

401



Power

ON

403



U

ser

R

equest

(RQS

KEY)

450



H

OLD

after

A

VEN,

ENVEN,

or

H

OLD

NEXT

451



R

QS

1

452



R

QS

2

453



R

QS

3

454



R

QS

4

455



R

QS

5

456



R

QS

6

457



R

QS

7(CH1

P

robe

I

d

entify)

458



R

QS

8(CH2

P

robe

I

d

entify)

459



SRQ

pen

d

ing

460



SELF

T

EST

COMPLETED

and

P

ASSED

E

X

E

C

U

TIO

N

W

A

RN

I

N

G

550



VOLTS/DIV

o

ut of

r

ange

551



VERTICAL

POSITION

o

ut of

range

552



TRIGGER

LEVEL

o

ut of

range

553



TRIGGER

POSITION

o

ut of

range

554



HORIZONTAL

ΤΙΜΕ

/DIV

out

of

range

555



V

XPD

out

of

range

556



CSW

POSITION

o

ut of

range

557



SET

Ν

value

out

of

range

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Tektronix 7D20 Reference guide

Brand: Tektronix

Model: 7D20

Category: Microphone accessories

Type: Reference guide

Tektronix 7D20 is a programmable digitizer that allows users to capture, store, and analyze waveforms with high precision and flexibility. It features two vertical channels with variable sensitivity settings, allowing you to measure a wide range of signals. The horizontal sweep speed can also be adjusted, enabling you to capture waveforms at different time scales.

The 7D20 offers various triggering modes, including peak-to-peak, auto, and normal, giving you control over when and how waveforms are captured. The trigger source can be selected from either channel, the line frequency, or an external source, providing versatility in triggering options.

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