Fnirsi 1013D Instruction sheet

Table of contents

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Product

instructions

FNIRSI-1013D

Two

channel

plate

oscilloscope

YOUR

GOOD

TEST

TOOL

Product

introduction

FNIRSI-1013D

is

a

full-featured,

highly

practical,

cost-effective

dual-channel

flat-panel

oscilloscope

launched

by

FNIRSI

for

the

maintenance

and

R

&

D

industry;

this

oscillo-

scope

has

a

real-time

sampling

rate

of

1GSa

/

s

and

an

analog

bandwidth

of

100MHz

*

2.

With

complete

trigger

function

(single

/

normal

/

automatic),

it

can

be

used

freely

for

periodic

analog

signals

or

non-periodic

digital

signals;

the

built-in

high-voltage

protection

module

can

tolerate

a

continuous

voltage

of

up

to

400V.

Oscilloscope

burnout

accident

caused

by

the

probe

being

turned

to

the

10X

position.

Large

time

base

scroll

mode

can

monitor

slow

level

changes;

Equipped

with

highly

efficient

one-key

AUTO,

which

can

display

the

measured

waveform

without

tedious

adjust-

ments;

the

display

is

equipped

with

a

7-inch

800

*

480

resolution

high-definition

LCD

LCD

screen,

and

the

operation

method

is

capacitor

Screen

touch

+

gesture

operation,

extremely

convenient;

cursor

measurement

function,

you

do

not

need

to

read

the

background

scale

unit

and

quantity

when

manually

reading

the

amplitude

and

frequency

parameters,

and

you

can

directly

get

the

peak,

peak

and

frequency

without

conversion;

extremely

convenient

screenshot

And

waveform

storage

function,

built-in

1GB

storage

space,

can

store

up

to

1000

screenshots

+

1000

sets

of

waveform

data,

the

storage

process

is

simple

and

fast,

save

the

current

waveform

anytime,

anywhere

with

a

single

touch,

no

cumbersome

prompts

and

choices,

keep

calm

The

current

data

is

saved

in

the

place,

which

is

very

convenient;

the

powerful

waveform

picture

manag-

er

supports

thumbnail

browsing,

viewing,

detailed

viewing,

page

turning,

deletion

and

waveform

zooming

in,

zooming

out,

moving,

etc.

to

facilitate

secondary

analysis.

The

fuselage

is

equipped

with

a

USB

interface,

which

can

be

connected

to

a

computer

to

share

its

screenshots

with

the

computer,

which

is

convenient

for

secondary

analysis;

Li

Shayu's

graphic

display

function

can

be

used

to

determine

the

amplitude,

frequency,

and

phase

contrast

of

two

groups

of

signals;

Analysis

of

the

harmonic

components

of

the

signal;

built-in

6000mah

high-quality

lithium

battery,

which

can

last

for

4

hours

on

a

full

charge,

and

can

be

used

while

charging

like

a

notebook

The

bandwidth

of

the

1X

probe

file

is

5MHz,

and

the

bandwidth

of

the

10X

probe

file

is

100MHz.

When

measuring

higher

than

5MHZz,

you

need

to

turn

the

switch

on

the

probe

handle

to

the

10X

position,

and

the

oscilloscope

must

be

set

to

the

10X

position

.

Otherwise

the

signal

will

be

greatly

attenuated,

as

is

the

case

with

all

oscillo-

scopes.

Because

the

probe

line

of

the

oscilloscope

itself

has

a

capacitance

of

up

to

100

—

300pF,

it

is

a

very

large

capacitance

for

high-frequency

signals!

The

signal

has

been

greatly

attenuated

through

the

probe

to

the

input

of

the

oscilloscope,

and

the

equiva-

lent

bandwidth

is

5MHz.

Therefore,

in

order

to

match

the

hundreds

of

pF

of

the

probe

line,

the

input

of

the

probe

line

is

attenuated

by

10

times

(the

switch

is

in

the

10X

range).

A

few

hundred

pF

capacitors

are

just

used

for

impedance

matching.

At

this

time,

the

bandwidth

is

100MHz.

Note

that

only

probes

with

a

bandwidth

of

100MHz

or

higher

can

be

used.

ZOuS/div

vPp

:1.960

EU

vP

:1.0zv

Freq

:

20.Oktiz

VPP

:1.940

Frea

:

5.00KHz

RUN

VPP

:1.96U

VP

:1.020

Freq

:

20.0RHz

VPP

:1.94U

Freq

:5.00RHz

1:

Function

menu

button

icon.

Click

here

to

pop

up

the

function

menu,

which

contains

system

setting

options

and

saved

screenshot

waveforms

and

USB

mode

options.

2:

Run

pause

indication

icon

3:

Channel

1

position

indication

means

that

the

parameters

near

this

block

area

are

all

parameters

of

Channel

1.

Clicking

this

area

will

pop

up

the

Channel

1

control

bar

4:

Probe

magnification

of

channel

1,

divided

into

1X,

10X,

100X

three

options

5:

Channel

2

position

indication

means

that

the

parameters

near

this

block

area

are

the

parameters

of

Channel

2.

Clicking

this

area

will

pop

up

the

Channel

2

control

bar

6:

Probe

magnification

of

channel

2,

divided

into

1X,

10X,

100X

three

options

7:

System

time

base

refers

to

the

length

of

time

represented

by

a

large

grid

in

the

horizontal

direction,

which

is

determined

by

the

sampling

rate.

The

larger

the

time

base,

the

slower

the

sampling

rate,

and

vice

versa.

8:

The

movement

speed

under

the

gesture

movement

operation.

[Move

coarse

adjustment]

means

fast

movement,

[Move

fine

adjustment]

means

slow

movement.

9:

Trigger

indication

icon,

which

means

that

the

parameters

near

this

block

area

are

all

trigger

related

parameters.

Clicking

this

area

will

pop

up

the

trigger

control

bar

10:

trigger

channel,

divided

into

CH1,

CH2

options

11:

Battery

remaining

power

indicator

icon,

green

block

indicates

remaining

power

12:

Main

interface

control

bar

function

switch

button,

click

this

button

to

switch

between

2

types

of

button

bar

13:

Run

pause

button,

click

this

button

to

switch

between

running

and

pause

14:

One-button

automatic

adjustment

button.

Clicking

this

button

will

automatically

identify

the

signal

and

set

the

system

to

the

best

parameters

to

display

the

waveform.

15:

Time

cursor

switch

button,

click

this

button

to

turn

the

cursor

measurement

function

on

and

off

16:

Voltage

cursor

switch

button,

click

this

button

to

turn

cursor

measurement

on

and

off

17:

Measurement

parameter

selection

function.

Click

this

button

to

pop

up

the

parameter

selection

bar.

Click

the

parameter

in

the

selection

bar

to

open

the

parame-

ter

display.

18:

One-click

screenshot

button,

click

this

button

to

take

a

screenshot

of

the

entire

screen

and

automatically

save

it

to

the

internal

storage

space

19:

One-click

waveform

save

button.

Clicking

this

button

will

save

all

waveform

data

of

2

channels

to

the

internal

storage

space.

20:

The

arrow

indicating

the

baseline

position

of

channel

2

is

the

position

of

OV

potential

21:

Waveform

data

of

channel

2

22:

Channel

1

baseline

position

indicating

arrow,

which

is

the

position

of

OV

potential

23:

Waveform

data

of

channel

1

24:

Input

coupling

indicator

icon

of

channel

1,

there

are

two

options

of

DC

and

AC,

DC

means

DC

coupling,

AC

means

AC

coupling

25:

The

vertical

sensitivity

indicator

of

channel

1

refers

to

the

voltage

represented

by

a

large

division

in

the

vertical

direction.

26:

Input

coupling

indicator

of

channel

2.

There

are

two

options:

DC

and

AC.

DC

means

DC

coupling

and

AC

means

AC

coupling.

27:

The

vertical

sensitivity

indicator

of

channel

2

refers

to

the

voltage

represented

by

a

large

grid

in

the

vertical

direction.

28:

Trigger

X

position

indicating

arrow,

which

refers

to

the

trigger

point

here

29:

Trigger

mode

indication

icon,

divided

into

Auto,

Single,

Normal;

Auto

is

automatic

trigger,

Sinle

is

single

trigger,

Normal

is

normal

trigger

30:

trigger

edge

indication

icon,

the

arrow

points

up

to

the

rising

edge

to

trigger,

the

arrow

points

down

to

the

falling

edge

to

trigger

31:

Channel

1

vertical

sensitivity

increase

button,

that

is,

zoom

in

vertically.

Clicking

this

button

will

zoom

in

the

vertical

direction,

that

is,

stretch

vertically.

32:

Channel

1

vertical

sensitivity

reduction

button,

that

is,

the

vertical

direction

is

reduced.

Click

this

button

to

reduce

the

waveform

in

the

vertical

direction,

that

is,

vertically.

33:

trigger

voltage

indication

icon,

that

is,

the

trigger

threshold

34:

Channel

2

vertical

sensitivity

increase

button,

that

is,

zoom

in

vertically.

Click

this

button

to

zoom

in

the

vertical

direction,

that

is,

stretch

vertically.

35:

Channel

2

vertical

sensitivity

reduction

button,

that

is,

the

vertical

direction

is

reduced.

Clicking

this

button

waveform

will

be

reduced

in

the

vertical

direction,

that

is,

vertically

reduced.

36:

50%

trigger

button

refers

to

setting

the

trigger

voltage

to

the

middle

position

of

the

waveform

amplitude.

Note

that

it

cannot

be

used

for

PWM

waveforms

with

dead

time.

This

type

of

waveform

requires

the

trigger

arrows

to

be

set

to

both

sides

of

the

waveform.

1:

System

function

menu

key

area,

click

this

area

to

pop

up

system

function

and

setting

menu

2:

Channel

1

control

bar

key

area,

click

this

area

to

pop

up

the

parameter

control

bar

of

channel

1

3:

Channel

2

control

bar

key

area,

click

this

area

to

pop

up

the

parameter

control

bar

of

channel

2

4:

Movement

speed

button

area,

click

here

to

switch

between

fast

movement

and

slow

movement

5:

trigger

control

bar

key

area,

click

here

will

pop

up

trigger

parameter

control

bar

6:

trigger

voltage

button

area,

press

here

and

slide

up

and

down

to

adjust

the

trigger

voltage

(trigger

threshold)

7:

The

time

base

shrinks

the

key

area,

that

is,

the

waveform

is

stretched

and

enlarged

in

the

horizontal

direction.

The

display

area

to

the

right

of

the

centerline

of

the

background

grid

is

the

key

area.

8:

The

time base

increases

the

key

area,

that

is,

the

waveform

is

pushed

horizontally

to

shrink.

The

area

to

the

left

of

the

centerline

of

the

background

grid

is

the

key

area.

9:

Channel

2

horizontal

baseline

button

area.

Press

here

and

slide

up

and

down

to

adjust

the

baseline

position

of

Channel

2.

You

can

also

directly

click

the

waveform

to

move

the

horizontal

baseline

(waveform

moves

up

and

down).

The

left

and

right

movement

buttons

of

the

waveform

are

the

entire

display.

Area

10:

Channel

1

horizontal

baseline

button

area.

Press

here

and

slide

up

and

down

to

adjust

the

baseline

position

of

channel

1.

You

can

also

directly

click

the

waveform

to

move

the

horizontal

baseline

(waveform

moves

up

and

down).

The

left

and

right

movement

buttons

of

the

waveform

are

the

entire

display.

Area

Operation

instructions

Turn

channel

1

/

channel

2

on

or

off:

Click

the

yellow

CH1

/

CH2

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

parameter

control

bar

for

channel

1

/

channel

2

will

pop

up,

and

then

click

the

[ON]

position

in

the

[open

CH1]]

column

to

enable

the

channel,

and

click

the

[OFF]

position

to

close

it.

The

channel

Turn

FFT

on

or

off:

Click

the

yellow

CH1

/

CH2

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

parameter

control

bar

for

channel

1

/

channel

2

will

pop

up,

and

then

click

the

[ON]

position

in

the

[open

FFT]

column

to

enable

the

FFT

of

the

channel.

Click

the

[Close]

position

to

Can

turn

off

the

FFT

of

this

channel

Set

the

input

coupling

mode:

Click

the

yellow

CH1

/

CH2

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

parameter

control

bar

for

channel

1

/

channel

2

will

pop

up,

and

then

click

the

[DC]

position

in

the

[Coupling]

column

to

set

the

channel

input

coupling

to

DC

coupling,

and

click

[AC

]

Position

to

set

the

channel

input

coupling

to

AC

coupling

Set

the

probe

input

magnification:

Click

the

yellow

CH1

/

CH2

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

parameter

control

bar

for

channel

1

/

channel

2

will

pop

up,

and

then

click

the

[1X]

position

in

the

[probe

mode]

column

to

set

the

input

magnification

of

the

channel

to

1X,

Click

[10X]

to

set

the

channel

input

magnification

to

10X,

click

[100X]

to

set

the

channel

input

magnification

to

100X

Enlarge

the

waveform:

Click

the

right

half

of

the

waveform

display

area

to

zoom

in

horizontally

(reduce

the

time

base),

click

the

[CTRL]

button,

set

the

key

control

bar

to

a

column

containing

vertical

zoom,

and

then

click

[V+]

to

zoom

in.

Zoom

in

Zoom

out

waveform:

Click

the

left

half

of

the

waveform

display

area

to

zoom

out

horizontally

(decrease

the

time

base),

click

the

[CTRL]

button,

set

the

button

control

bar

to

a

column

containing

vertical

zoom,

and

then

click

[V-]

to

zoom

out.

Zoom

out

Move

waveform:

Click

the

waveform

curve

line

or

the

waveform

area

and

then

move

to

move

the

waveform

in

any

direction

Adjust

the

trigger

voltage:

Click

the

green

arrow

area

to

the

right

of

the

display

area

and

move

it

up

or

down

to

adjust

the

trigger

voltage

Set

the

trigger

edge:

Click

the

green

T

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

trigger

parameter

control

bar

will

pop

up,

and

then

click

the

[rising]

position

in

the

[trig

mode]

column

to

set

the

rising

edge

trigger,

and

click

the

[falling

]

position

Can

be

set

to

trigger

on

falling

edge

Set

the

automatic

trigger:

Click

the

green

T

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

trigger

parameter

control

bar

will

pop

up,

and

then

click

the

[auto]

position

in

the

[trig

mode]

bar

to

set

the

automatic

trigger.

Set

single

trigger:

Click

the

green

T

control

bar

area

in

the

upper

left

corner

of

the

screen,

the

trigger

parameter

control

bar

will

pop

up,

and

then

click

the

[Single]

position

in

the

[trig

mode]

column

to

set

it

as

a

single

trigger.

Set

the

general

trigger:

Click

the

green

T

control

bar

area

in

the

upper

left

corner

of

the

screen,

and

the

trigger

parameter

control

bar

will

pop

up,

and

then

click

the

[normal]

position

in

the

[trig

mode]

bar

to

set

the

normal

trigger.

Pause

display:

Click

the

[RUN/STOP]

button

in

the

rightmost

button

bar

of

the

screen

to

pause

/

run

the

system.

If

you

do

not

have

this

button,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button

Automatically

adjust

the

waveform:

Click

the

[AUTOSET]

button

on

the

right-most

button

bar

to

automatically

adjust

to

the

optimal

setting

according

to

the

signal

characteristics

to

display

the

waveform.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Set

the

slow

sweep

scroll

mode:

Click

the

left

half

of

the

waveform

display

area,

and

Set

the

slow

sweep

scroll

mode:

Click

the

left

half

of

the

waveform

display

area,

and

the

time

base

will

become

larger.

When

the

time

base

reaches

100mS,

the

system

will

enter

the

slow

sweep

scroll

mode.

100mS

>

50S

belong

to

the

scroll

mode

time

base.

Cursor

measurement:

Click

the

[time

cursor]

button

on

the

right-most

button

bar

to

manually

measure

the

equivalent

frequency

of

the

time

difference,

and

click

the

[V

CURSOR]

button

to

manually

measure

the

voltage.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Set

the

parameters

to

be

displayed:

Click

the

[MEASURS]

button

on

the

far

right

button

bar

to

open

the

parameter

control

bar,

and

click

the

parameter

in

the

selection

bar

to

open

the

parameter

display.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Save

the

current

screen

display:

Click

the

[SAVE

PIC]

button

on

the

far

right

button

bar

to

take

a

screenshot

of

the

entire

screen

and

automatically

save

it

to

the

internal

storage

space.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Save

the

current

waveform

data:

Click

the

[SAVE

WAVE]

button

on

the

far

right

button

bar

to

save

all

the

waveform

data

of

the

opened

channel

to

the

internal

storage

space.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Adjust

the

screen

brightness:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up 4

function

control

bars,

and

then

click

the

first

[System

Settings]

to

pop

up

5

setting

control

bars,

and

then

click

[Screen

Brightness]

to

adjust

the

screen

display

Brightness,

100

is

the

brightest

and

0

is

the

darkest

Adjust

the

background

grid

brightness:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up

4

function

control

bars,

and

then

click

the

first

[System

Settings]

to

pop

up

5

setting

control

bars,

and

then

click

[Grid

Brightness].

Adjust

the

background

grid

brightness

of

the

waveform

display,

100

is

the

brightest,

0

is

to

turn

off

the

grid

display

Settings

are

always

triggered

automatically

at

50%:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up

4

function

control

bars,

and

then

click

the

first

[System

Settings]

to

pop

up

5

setting

control

bars,

and

then

click

[Always

trigger

50%]

Automatically

set

to

50%

when

it

is

green.

In

the

automatic

trigger

mode

after

setting,

the

waveform

of

each

measurement

is

half

the

peak

voltage

of

the

waveform.

Horizontal

baseline

offset

calibration:

When

the

probe

has

been

pulled

out,

when

the

yellow

/

cyan

indicator

arrow

and

the

yellow

/

cyan

horizontal

baseline

on

the

left

of

any

of

the

two

channels

are

not

in

the

same

position,

calibration

is

required.

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up 4

function

control

bars,

and

then

click

the

first

[System

Settings]

to

pop

up

5

setting

control

bars,

and

then

click

[Baseline

Calibration].

You

need

to

unplug

all

the

probes

and

USB

Charge

the

power,

make

sure

it

is

unplugged,

and

then

click

[OK]

to

perform

the

calibration.

View

the

screenshot

after

saving:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up

4

function

control

bars,

and

then

click

the

second

[Picture

view]

to

enter

the

picture

thumbnail

preview

interface,

which

contains

the

thumbnail

of

the

waveform

of

the

screenshot.

Click

the

thumbnail

to

view

the

screenshot

of

the

waveform

in

full

screen.

Clicking

the

bottom

of

the

screen

will

pop

up

the

control

bar

with

the

return,

delete,

previous,

and

next

control

buttons.

You

can

also

click

[Select

All]

or

[Select]

in

the

preview

interface.

To

delete

View

saved

waveform

data:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up 4

function

control

bars,

and

then

click

the

third

[Waveform

View]

to

enter

the

waveform

thumbnail

preview

interface,

which

contains

thumbnails

of

the

saved

waveforms.,

Click

the

thumbnail

to

analyze

the

waveform

in

full

screen,

you

can

move

and

zoom

the

group

of

waveforms

arbitrarily,

you

can

also

click

the

cursor

to

measure

manually,

you

can

also

click

the

parameter

control

panel

to

reselect

the

parameters

to

be

displayed,

etc.

]

Refers

to

the

previous

set

of

waveforms,

[page

down]

refers

to

the

next

set

of

waveforms

Delete

the

saved

waveform:

In

the

full-screen

view

waveform

interface,

click

the

[Delete

Wave]

button

on

the

far

right

button

bar

to

delete

this

group

of

waveforms.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Take

a

screenshot

in

the

waveform

browser:

In

the

full-screen

view

of

the

waveform

interface,

click

the

[SAVE

PIC]

button

on

the

far

right

button

bar

to

take

a

screenshot

of

the

entire

screen

and

automatically

save

it

to

the

internal

storage

space.

If

this

button

is

not

available,

you

need

to

press

the

[CTRL]

button

to

switch

to

the

button

bar

containing

the

button.

Connect

the

computer

to

view

the

screenshot

of

the

oscilloscope:

Click

the

[MENU]

button

in

the

upper

left

corner

of

the

screen

to

pop

up 4

function

control

bars,

and

then

click

the

fourth

[USB

Connection]

to

enter

the

USB

transmission

interface.

At

this

time,

use

the

standard

Android

USB

If

the

data

cable

is

connected

to

the

computer,

the

removable

disk

can

be

ejected.

You

can

find

the

saved

screenshot

in

the

disk.

Note

that

you

cannot

modify

the

file

name

of

the

image

directly

in

the

disk.

Otherwise,

the

oscilloscope

image

manager

cannot

display

the

image.

Analysis

of

common

problems

1:

Why

can't

I

turn

on

the

phone

after

receiving

it?

A:

Maybe

after

the

final

test

is

completed,

the

tester

forgets

to

shut

down

and

puts

it

in

the

inventory

until

it

runs

out.

After

receiving

the

goods,

it

runs

out

of

power.

Please

use

USB

for

half

an

hour

before

powering

on.

Do

not

use

computer

USB

for

charging.

Computer

USB

If

the

power

is

too

low,

you

will

be

dissatisfied.

Use

the

original

charger.

2:

Why

is

there

no

waveform

in

the

test,

and

there

is

only

one

line

on

the

screen?

Answer:

Please

check

whether

the

pause

has

been

pressed.

If

not,

press

the

[Auto

Adjust]

button

once.

If

not,

it

may

be

that

the

signal

source

does

not

have

a

signal

output,

or

the

probe

wire

is

short-circuited

or

disconnected.

Please

check

with

a

multimeter.

Whether

the

probe

and

signal

source

are

normal

3:

Why

is

the

voltage

value

data

0?

Answer:

Please

adjust

the

vertical

sensitivity

and

time

base

(sampling

rate),

or

press

the

[AUTOSET]

screen

to

display

at

least

a

clear

and

complete

periodic

waveform,

and

the

top

and

bottom

of

the

waveform

should

be

completely

displayed

on

the

screen,

without

cutting

the

top.

Voltage

data

is

correct

4:

Why

is

the

frequency

value

data

0?

Answer:

First

of

all,

you

need

to

make

sure

that

the

trigger

mode

is

Auto.

If

it

is

still

O

in

Auto

mode,

you

need

to

press

the

[AUTOSET]

button

once.

At

least

one

clear

and

complete

periodic

waveform

is

displayed

on

the

screen,

and

the

waveform

is

to

be

triggered.

(The

green

arrow

indicates

that

the

position

is

between

the

top

and

bottom

of

the

waveform.

It

is

fixed

and

does

not

shake.)

The

data

of

the

frequency

value

is

correct.

5:

Why

is

the

duty

cycle

0?

Answer:

First

of

all,

you

need

to

ensure

that

the

trigger

mode

is

Auto.

If

it

is

still

O

in

Auto

mode,

the

trigger

may

not

be

adjusted

between

the

waveforms.

After

the

trigger

line

is

adjusted

between

the

waveforms,

the

waveform

will

be

fixed.

The

duty

cycle

data

is

correct

after

at

least

1

clear

periodic

waveform

is

displayed

6:

Why

are

the

AC

coupled

and

DC

coupled

waveforms

the

same?

Answer:

If

the

input

signal

is

a

symmetrical

AC

signal

(signal

output

by

the

signal

generator),

the

waveform

is

the

same

whether

it

is

AC

coupling

or

DC

coupling.

If

it

is

an

asymmetric

AC

signal

or

a

DC

pulsating

signal,

the

waveform

is

only

when

the

coupling

is

switched.

Will

move

up

and

down

7:

Why

does

the

waveform

jump

up

and

down

when

I

test

the

signal?

Ica

n’

t

see

any

waveform

but

only

see

multiple

lines

jumping

up

and

down?