UNI-T UTD2062C, UTD2042C, UTD3025C, UTD3062C, UTD2082C Operating Manual

Introductio

n

Dear users

:

Thank you for purchasing UNI-T product. To operate the instrument correctly, please
read this Operating Manual carefully and especially its “Safety Notice” before use

.

Afer reading it, you are suggested to keep the manual properly. Please keep it with the
instrument together or place it in an accessible location for future use

.

General Safety Overview

The instrument is designed and manufactured strictl

y

according to “Safety Requirements of Electronic
Measuring Instruments” (GB4793) and IEC61010-1
Safety Standard . It conforms to “Insulation Overvoltage
Standard” (CAT 600V) and Safety Standard wit

h

Pollution Level You are expected to know the followin

g

safety precaution measures to avoid personal injury or
product damage or any other product connected to it

.

Please use the product according to the regulations so
as to avoid the possible damage

.

Only personnel with professional training can execute
maintenance procedure to avoid fire or personal
injury. Appropriate power wires should be used and
special power wires must be approved by the state

.

Reliable grounding of products: The product is
grounded by ground conductor of power supply

.

Ground conductor must be connected to earth to
avoid electric shock. Please guarantee correct

grounding before connecting input/output terminal of

the product

.

Correct connection of oscillograph probe: Earth wire

of probe is the same to earth potential. Ple ase do not

connect earth wire to high volt age

.

Review of rated values of all terminals: Please refer to
all rated values and marks on the product surface to
avoid fire or excessive current shock. Please refer to

product manual before connecting products so as to

know details of rated value s.D o not open cover plate

of machine box: It is not allowed to start or operate the
product when opening external cover or panel

.

Ċ

Ċ

Correct plug-in/out: Please do not plug in/out whe

n

connecting probe or testing conduits to voltage
source

.

Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000

Usage of appropriate fuse: It is only allowed to use
fuse type and rated indicator designated by the
product

.

To avoid exposed circuits: It is not allowed to touc

h

exposed connector or element after power supply

.

Operation is not allowed if there is any doubt for
product trouble: Please consult qualified maintenance
personnel to inspect the product if there is any trouble
doubt

.

It has to maintain appropriate ventilation. It is not
allowed to operate in wet locations. It is not allowed
to operate in combustible and explosive
environment. It has to keep product surface clea

n

and dry

.

Terms in the manual: The following terms may be
seen in the manual

:

Terms for products: The following terms may be
Danger: It refers to direct injury near the mark

.

Warning: It refers to potential injury near the mark

.

Note: It refers to potential danger for the product
and other properties

.

Warning: Warning s tatement means the

conditions and behaviors that may endanger lives.

Note: Notice statement means the conditions
and behaviors that may cause other property
damage

Protective

ground terminal

Ground terminal

for chassis

Ground terminal

for testin

g

Caution

!

Refer to manual

High voltage

Safety Ter ms and Symbols

Product symbol: Following symbols may be show

n

on the product surface

.

Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000

The manual is about operation information of OPERATING MANUAL FOR UTD2000/3000 digital storage
oscillograph. The manual includes the following chapters
Chapter 1: User Guideline: It is to introduce functions of digital storage oscillograph easily and provide
installation guidelines

.

Chapter 2: Instrument Setup:Operation methods of OPERATING MANUAL FOR UTD2000/3000 digital
storage oscillograph

.

Chapter 3: Application example: Examples to solve various measurement problems
Chapter 4: System Prompt and Troubleshootin

g

Chapter 5: Appendix: Technical Indicators

A

ppendix B: Fittings of OPERATING MANUAL FOR UTD2000/3000 series digital storage oscillograph

A

ppendix C: Maintenance and Cleaning Maintenance

Preface

The manual includes 3 series of digital storage oscillograph as follows. Detailed models are shown in the
following form

:

Operating Manual for UTD2000/3000

UTD2 C/UTD3025

C

02

5

UTD2 C/UTD3042

C

04

2

UTD2 C/UTD3062

C

06

2

UTD2 C/UTD3082

C

08

2

UTD2 C/UTD3102

C

10

2

UTD2 C/UTD3152

C

15

2

UTD2 C/UTD3202

C

20

2

UTD2 CE/UTD3042CE04

2

UTD2 CE/UTD3062CE06

2

UTD2 CE/UTD3082CE08

2

UTD2 CE/UTD3102CE10

2

UTD2 CE/UTD3152CE15

2

UTD2202CE/UTD3202CE
UTD2025C

L

UTD2052C

L

UTD2052CE

X

UTD2102CE

X

25MH

z

40MH

z

60MH

z

80MH

z

100MH

z

150MH

z

200MH

z

40MH

z

60MH

z

80MH

z

100MH

z

150MH

z

200MH

z

25MH

z

50MH

z

50MH

z

100MH

z

250MS/s
500MS/s
500MS/s
500MS/s
500MS/s
500MS/s
500MS/s

1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s

1GS/s
1GS/s

250MS/s
500MS/s

UTD2000C/3000

C

UTD2000E/3000E

UTD2000

L

UTD2000E

X

UTD2000/300

0

Series Model

Band width

Real-time

Operatin g Manual for UTD2000/3000

UTD2000/3000 series digital storage oscillograp

h

provides simple front panel with clear functions to
users for all basic operations. Scale and position of
various channels can provide intuitional operatio

n

to meet usage habits of traditional instruments

.

Users can use it skillfully without learning and
being familiar with operation for a long time. Users
can also press AUTO key directly to accelerate
adjustment and facilitate measurement

.

A

ppropriate waveform and gear setup can be

shown on the instrument panel

.

UTD2000/3000 series digital storage oscillograp

h

also has high-performance indicators and powerful
functions to fulfill measurement tasks quickl

y

besides easy usage. Quicker signals can be
observed by UTD2000/3000 series digital storage
oscillograph by real-time sampling of 500MS/s (or
1GS/s) and equivalent sampling of 25GS/s (or
50GS/s). It can capture and analyze waveform

easily by powerful trigger and analysis capacity

.

Users can also observe and analyze signal
problems quickly and clearly by clear LCD displa

y

and mathematical calculation function. We can see
that such series of digital storage oscillograph ca

n

meet your measurement requirements by following

performance characteristics

:

Double analog channels

High-resolution colorful LCD display system wit

h

resolution of 320 240 or 800 480

To support plug and play USB storage instrument

to communicate with computer

A

utomatic waveform and status setup

Waveform, setup, bitmap storage, waveform and

setup reoccurrence

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hr

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Elaborate view window extension function for

delicate analysis of w aveform details and profile

A

utomatic measurement of 28 kinds of

waveform parameters

A

utomatic cursor tracing and measurement

functio

n

Unique waveform recording and playback

functions

Embedded FFT
Multiple mathematical calculation functions

(including +, -, for waveform

Edge, video, pulse width and ALT TRIG

functions

Multi-language menu displa

y

Fittings of UTD2000/3000 series digital storage
oscillograp

h

2 probes of 1.2m 1:1/10:1 please refer to
manual of probe Fittings of probe details so as
to meet EN61010-031:2008 standar

d

1 power wire to meet national standards
1 Operating Manual
1 Product Warrant

y

USB connecting wire: UT-D06 or UT-D0

5

Communication control software for
UTD2000/3000 series oscillograp

h

㧦

Operating Manual for UTD2000/3000

Item

Elementary understanding of Trigger System..........................................

.

Page

..........................................................................................

.

.........................................................................................

.

......................................................................................

.

............................................................

.

Elementary understanding of Vertical System...............................................

.

Elementary understanding of Horizontal System..........................................

.

General Safet y Overvi ew
Preface

Setup of Vertical System........................................................................

.

Setup of Horizontal System.....................................................................

.

Setup of Trigger System..........................................................................

.

General Inspectio

n

Function Inspectio

n

Probe Compensatio

n

A

utomaticSetup of Waveform Displa

y

Chapter 1: User Guideline ..................................................................................

.

5
5

8

9
9

11

1

4151627

31

Operatin g Manual for UTD2000/3000

Content

s

Chapter 2: Instr ument Setup.......................................................................

1

Page

...................................................................................

.

..........................................................................................

.

Setup of Auxiliary Functions .............................................................................

.

A

utomatic Measurement...................................................................................

.

Cursor Measurement ........................................................................................

.

....................................................................................................

....................................................

.

.............

.

..................................................................

.

Setup of Display System

Storage and Callout

Operation Ke

y

Chapter 3: Application Examples

Example 1: Measurement of Simple Signals

Example 2: Delay Obser vati on of Sin e Sig na l s by Circ ui t.. ... .... ... ... ... ... .... ... .

.

Example 3: Capture of Sing le S igna l .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... .

.

Example 4: Reduction of Ran do m Noi se for S igna ls. ... ....................... ... ... ....

.

Example 5: A p plic a tion Cu r sor Me asu r em en t.. ... .... ... ... ... .... ... ... ... .... ... ... ... ...

.

Example 6: Application of X-Y Functio

n

Example 7: Trigger of Video Signals

................. ... .... ... ... ... .... ... ... ....... ... ...

.

.................. ... .... ... ... ... ... .... ... ...

.

4

8505560687072727375767879

81

4

4

Operating Manual for UTD2000/3000

Item

Setup of Sampling System................................................................

.

Item Page

.......................................................

.

............................................................................

.

....................

.

.....................................................

.

...............................................................................................

.

.........................................

Examp

Examp : Usage of Upgrading Procedure of U disk

System Prompt Informatio

n

Troubleshootin

g

A

ppendix A: Technical Indicators......................................................

.

A

ppendix B: Fittings of UTD2000/3000 Series Digital Storage Oscillograph..

.

A

ppendix C: Maintenan ce and Clea ning Mai nte nan ce... ..... .... .... .... ..... .. ....

.

Example 10: Usage of Storage Functio

n

Chapter 4: S ystem Prompt and Troubleshooting

Chapter 5: Technical Indicators............................................................

Example 8: Pass/Fail Detectio

n

Example

9

8

889

91

91

10

4

10

583848588

Operating Manual for UTD2000/3000

Operating Manual for UTD2000/3000

Chapter 1: User Guideline

Ƹ

Ƹ
Ƹ

Function inspectio

n

Elementary understanding of vertical system
Elementary understanding of horizontal system

UTD2000/3000 series digital storage oscillograph is
a small and handy desktop product. Basic test can be
done by providing convenient front panel to facilitate
operation for users

.

UTD2000/3000 series are to provide simple front
panel with clear functions to users for basic
operation. Panel also includes knob and function key

.

Knob functions are similar to those of other digital
storage oscillograph

.

The chapter is to show execution of following steps

General inspectio

n

5 keys in a row in the right side of display panel are

menu operation keys. (They are defined as F1 to F

5

keys from top to bottom.) You can also set different
options for current menu by them. Other keys are
function keys. You can enter into different functio

n

menus or gain specific function application directly

by them

.

㧦

Elementary understanding of trigger system

Please know front operation panel firstly after
getting UTD2000/3000 series digital storage

oscillograph. The chapter is to introduce operation

and functions of front panel for
UTD2000/3000products so as to be familiar wit

h

usage within the shortest period

.

General inspectio

n

Ƹ

Ƹ

Ƹ

A

utomatic setup of waveform displa

y

Probe compensatio

n

Ƹ

1

Operating Manual for UTD2000/3000

2

5.7 inch front panel of UNI-T

probe compensatio

n

signal output

vertical control

horizontal control

Operatio

n

controls

multi-purpose

knob controller

commo

n

men

u

trigger control

EXT TRIG INPUT

analog signal input

interface

Operating Man ual for UT D2000/30 00

3

probe compensatio

n

signal output

vertical control

horizontal control

Operatio

n

controls

multi-purpose

knob controller

commo

n

men

u

trigger control

EXT TRIG INPUT

analog signal input

interface

7 inch front panel of UNI-T

Operatin g Manual for UTD2000/3000

4

display of horizontal trigger positio

n

time display of central scale line

vertical scale
coefficient of
display channel

display setup of

main time base

waveform
display window

Menu varies wit

h

different functio

n

keys

.

mark of
channel

2

display of trigger status

mark of
channel 1

Interface display diagram of digital storage oscillograph (i.e. UTD2000L series

)

Operating Manual for UTD2000/3000

5

General inspectio

n

Function inspectio

n

It is suggested to inspect the instrument b

y

following steps when getting a new UTD2000/3000
series digital storage oscillograph

.

1. To check if there is damage due to transportatio

n

or not

.

Please replace carton or foaming plastic protectio

n

cushion with severe damage instantly

.

2. Please inspect fitting details and shown it i

n

“Fittings of UTD2000/3000 series digital Storage
Oscillograph” shown in the manual. You can check
if there are deficient fittings or not by referring to it

.

Please contact UNI-T distributor or local agent if
there are deficient or damaged fittings

.

3. Please inspect the entire machine and contact UNI-T
distributor or local agent for damaged appearance

,

abnormal operation or failing to pass performance test

.

Please pay attention to packages and report to

transportation department and UNI-T distributor if
machine damage is caused by transportation

.

1. Connect the power suppl

y

You can supply power to the machine and voltage is A

C

100V to AC 240V. Frequency is 45Hz to 440Hz. It has
to press [UTILITY] menu and [F1] for self-correctio

n

after power supply 30 minutes after operation of hot
machine so that digital storage oscillograph operates
under the

best status. As shown in Figure 1 4, please

enter into next page and press [F1] to call out ex-factor

y

setup

.

㧙

UNI-T will arrange maintenance or replacement

.

Please carry out once fast function inspection to
check if the machine operates normally or not

.

Please operate according to following steps

:

Warning: Please confirm safety grounding of digital
storage oscillograph to avoid dangers

.

2. Signal access of digital storage oscillograph is
double-channel input for UTD2000/3000 series
digital storage oscillograph. There is also 1 EXT
TRIG INPUT channel. Please connect signals
according to following steps

:

(As shown in Figure 1-5), connect probe of
digital storage oscillograph to CH1 input terminal
and set attenuation ratio switch on probe to 10×

Á

Figure 1 5 Setup of attenuation ratio switch o

n

probe

㧙

ķ

ˊ

Operating Manual for UTD2000/3000

6

Figure 1-

4

power switc

h

function butto

n

F

1

MEASURE

CURSO

R

DISPLAY

A

CQUIRE STORAGE

UTILITY

MULTIPURPOSE

SELECT

AUTO

CH

1CH2

F

2F3

F

4

F

5

POSITION

SCALE SCALE

VOLTS DIV

VVm

POSITION

SECD IV

SS

LEVEL

MATH

FORCE

HELP

MENU

TRI

G

MENU

HORI

VERTICA

L

CH

1

TRIGGE

R

HORIZONTA

L

CH2

SET

Operating Man ual for UT D2000/30 00

Operating Man ual for UT D2000/30 00

7

ĸIn digital storage oscilloscope to set the probe

attenuation factor. The attenuation coefficient of
vertical gear ratio change instruments, whic

h

makes measurement resultsSetup method of
attenuation coefficient of pr obe is as follows to
show amplitude of measured s ignals correctly

.

Please press

Figure 1-6 Setup of deflection coefficient of probe
on digital storage oscillograp

h

F4 key for menu display of 10

×

Connect probe and grounding clip to

corresponding connection ends then press [AUTO]

button. As shown in Figure 1-7, square wave (1kHz

,

about 3V and peak value) can be displayed withi

n

several seconds. It has to inspect CH2 by the same

method then press [OFF] function button so as to
power off CH1. It has to press [CH2] function butto

n

to power on CH2 and repeat the second and third

steps.

Ĺ

Proberatio

n

Figure 17㧙

Operating Manual for UTD2000/3000

Probe compensatio

n

It needs to adjust it when connecting probe to an

y

input channel for the first time so that probe can be
appropriate to input channel. Probe without
compensation correction can also bring i

n

measurement tolerance or error. Please operate
according to following steps for adjustment of
probe compensation

:

1. To set probe menu attenuation coefficient to
10× and place probe switch to 10× then connect
digital storage oscillograph probe to CH1. Please
guarantee reliable contact to probe. It has to
connect probe end to signal output connector2of

probe compensator then connect grounding clip to
earth wire connector of probe compensator. It also
has to power on CH1 and press [AUTO]

.

3. Adjust variable capacitance on the probe b

y

screwdriver of non-metallic handle for waveform
display of “insufficient compensation” or
“excessive compensation” shown in above figure
until “correct compensation” for waveform displa

y

on the screen as above

.

Warning: Please guarantee perfect insulatio

n

conduits of probe and do not contact metallic part
of probe when connecting to HV source to avoid
electric shock of probe during HV measurement

.

 Observation of displayed waveform

8

Exceedin

g

compensatio

n

Correct

compensation

Insufficient

compensation Figure 1

8

㧙

Compensation correction of probe

Operatin g Manual for UTD2000/3000

9

Automatic setup of waveform displa

y

UTD2000/3000 series digital storage oscillograp

h

has automatic setup functions. It can adjust vertical
deflection coefficient, scanning time base and
trigger mode automatically according to input
signal for the most appropriate waveform display

.

Frequency of measured signals shall be more tha

n

or equal to 50Hz and duty cycle shall exceed 1%
according to automatic setup requirements

.

1. Connect measured signals to signal input
channel

.

2. Press [AUTO] button so that digital storage
oscillograph can set ver tical deflection coefficient

,

scanning time base and trigger mode
automatically. They can be adjusted again after
careful observation and automatic setup so that
waveform display can realize the best effect

.

A

s shown in the following figure, there are a series
of keys and knobs in vertical control a rea. Please
introduce usage of vertical setup gradually as
follows

.

Automatic setup

Elementary understanding of vertical system

㧦

5.7-inch vertical

control panel of scree

n

7-inch vertical control
panel of scree

n

Figure 1 9 Vertical control area on the panel㧙

Operating Manual for UTD2000/3000

10

1. Use vertical position knob so that middle displa

y

of waveform signal in the window. Vertical displa

y

position of signal can be controlled by vertical

position knob

.

Ground mark moves vertically with waveform whe

n

rotating vertical position knob

.

Measurement knack
You can observe difference between waveform
and signal ground to measure DC component

of signal quickly if adopting DC channel
coupling mode. DC components in the signal
will be filtered if adopting AC coupling mode
. You can also display AC component of signal

by higher sensitivity conveniently

.

Vertical position of double analog channels shall be

restored to short-cut key of zero pointnamely

,

SET TO ZERO

.

The key is to return vertical displacement/horizontal
displacement/hold off position to zero point

(or middle point)

.

Of w hich: UTD2000L /2000EX se ries will trigger
electric level Return to 50% of position

.

2 Alter vertical setup and observe alternation of
status information. You can determine variation of an

y

vertical gear by s tatus bar below waveform window

.

Vertical gear of “volt/grid” can be altered by rotatin

g

vertical scale knob to show corresponding variation for

channel gear display which corresponds to status bar

.

User can press [CH1], [CH2] , [MATH] and [REF] to
display operation menu, mark, and waveform and

gear status information of corresponding channels

.



Operating Manual for UTD2000/3000

1

1

Users can also press [OFF] key to c lose currentl

y

selected channels for UTD2000C/3000C and
UTD2000E/3000E oscillograph. They can also
click on CH1, CH2 and MATH keys twice to close
corresponding channels for UTD2000L/2000EX
oscillograph

.

A

s shown in following figure, there is 1 key and

2

knobs in horizontal control area. Please be familiar

with setup of horizontal time base gradually as
follows

:

Elementary understanding of horizontal system

Horizontal cont rol
panel of 5.7-inc

h

Horizontal cont rol
panel of 7-inc

h

Figure 1 10 Horizontal control area on the panel㧙

Operating Manual for UTD2000/3000

1. Use horizontal SCALE knob to alter horizontal
time base gear then observe alternation of status
information. To rotate horizontal SCALE knob to
alter “s/div” time base gear so as to show
corresponding variation of time base gear displa

y

for corresponding channels of status bar

.

Horizontal scanning speed steps from 2ns/di

v

s/div by way of 1 mode

.

Note: Horizontal scanning time base gear varies
for UTD2000/3000 series digital storage
oscillograph due to different models

.

γ

㨪

㧙㧙50 2

5

2. Use horizontal POSITION knob to adjust
horizontal position of signals in waveform window

.

To use horizontal POSITION knob to control trigger
displacement of signals. Horizontal movement of
waveform with knob can be observed when rotatin

g

horizontal POSITION knob for application for
trigger displacement

.

3. Please press [MENU] button for 5.7-inc

h

oscillograph (and press [HORI MENU] button for 7­inch oscillograph) to display Zoom menu. Please
press [F3] to open view window extension under
this menu then press [F1] to close view window
extension and return to main time base. Hold off
time can be set under this menu

.

1

2

Operating Manual for UTD2000/3000

1

3

Trigger point can be r estored to vertical m iddle
point quickly by short-cut key of [SET TO ZERO] so
as to restoring displacement of trigger point to
horizontal zero point short-cut key. Users can also
adjust horizontal position of signal in waveform
window by rotating horizontal knob

.

Term explanatio

n

Trigger point: It refers to posi tion of actual trigger
point by comparing with middle point of storage
instrument. Users can move trigger horizontally b

y

rotating horizontal POSITION knob

.

Hold off: It refers to interval to start up trigger
circuit a gain

.

Hold off time can be set by rotatingmulti-purpose
knob controller

.

A

s shown in Figure 1 there is 1 knob and

3

(or 2) keys in control area of trigger menu. Pleas e
be familiar with setup of trigger system gradually as
follows

:

POSITIO

N

Elementary understanding of trigger system

㧙11

5.7-inch screen 7-inch scree

n

Figure 1-1

2

Trigger men

u

Figure 1 Trigger menu on the panel㧙11

1. To user trigger level knob to alter trigger level
and instruct trigger level line by seeing trigger mark
on the screen so that it moves vertical ly with knob
rotation. Variation of tr igger level in lower part of
screen can be observed when moving trigger level
at the same time

.

2. (As shown in Figure 1-12,) TRIGGER MENU ca

n

be used to alter trigger setup

.

User can press [F1] key to select “edge” trigger

.

n trigger signal amplitude

.

i

4.To press FORCE button: To produce 1 trigger

signal forcefully for mainly application for normal
and single trigger mode

.

Operating Manual for UTD2000/3000

14

They can press [F2]key to select “trigger source

”

to CH1

.

They can press [F3] key to set “gradient” of edge

type to ascending

.

They can press [F4 ]key to set “trigger mode” to

automatic. They can also press F5 key to set

“trigger coupling” to AC

.

They can press [50%] button for 5.7-inch oscillograp

h

and press [SET TO ZERO] key for 7-inch oscill ograph

.

It also has to set vertical middle point of trigger level

2

.

Operating Manual for UTD2000/3000

1

5

Chapter 2: Instrument Setup

By now, you have been familiar with operation of
vertical control area, horizontal control area and
trigger system menu for UTD2000/3000 series digital
storage oscillograph preliminarily. You should be
familiar with setup of digital storage oscillograph b

y

menu operation by introduction shown in previous
chapter. It is suggested to read Chapter 1 if you have
not been familiar with above operation and methods

.

The chapter is mainly to introduce following themes

Set trigger systems of [TRIGGER LEVEL]

,

[MENU], ]50%] and] FORCE]

;

Set sampling mode of [ACQUIRE]

;

It is suggested to read the chapter carefully to know
many measurement functions for UTD2000/3000
and system operation method

.

㧦

Ƶ

Ƶ

Ƶ

Ƶ
Ƶ
Ƶ
Ƶ
Ƶ
Ƶ

Ƶ Set vertical systems of [CH1], ]CH2],] MATH]

,

]REF] , ]OFF] ]VERTICAL POSITION] and
]VERTICAL SCALE]

;

Set horizontal systems of ]MENU] or ]HO

R

MENU], ]HORIZONTAL POSITION] or
[HORIZONTAL SCALE]

;

Set display mode of [DISPLAY]

;

Store and call-out for [STORAGE]

;

Set auxiliary system of [UTILITY]

;

A

utomatic measurement of [MEASURE]

;

Cursor measurement of [CURSOR]

;

Use execution buttons of [AUTO] and

[RUN/STOP]

;

Operating Manual for UTD2000/3000

Setup of vertical system

CH1 and CH2 channels and setup
Every channel has its own vertical menu. Ever

y

item can be set individually acc ording to different
channels. As shown in Form 2-1, the system ca

n

display operation menu of CH1 or CH2 channel b

y

pressing CH1 or CH2 function key

.

1

6

1
1

0100

100

0

h

h

h

h

Setup

Descriptio

n

Function menu

Couplin

g

ACDC

To obstruct DC component
of input signal

.

To cut off input signals by A

C

and DC components of input
signals

.

Groundin

g

Bandwidt

h

limit

O

N

OFF

To limit band width to 20MH

z

so as to reduce display noise.

Full band widt

h

Volt /g ri

d

Coarse
tunin

g

To set vertical deflectio

n

coefficient for coarse tunin

g

by 1-2-5 system. To refine

within setup scope of coarse

tuningforfinetuningsoasto

improve vertical resolution

.

Fine
tunin

g

Probe

To select one value according

to probe attenuatio

n

coefficient to keep correct
vertical deflection coefficient

.

There are totally 4 kinds

,

namely,1 ,10 ,10

0

and 1000

.

hh h

h

Reverse phase

O

N

OFF

To realize reverse directio

n

function for waveform

;

To display waveform normally.

Form 2-1

1
Measured signal is a sine signal with DC component
by taking exerting signal to CH1 channel as a

n

example

.

To press F1 to select AC and AC coupling mode. D

C

component contained by measured signal will be
obstructed. Waveform display is shown in followin

g

figure

.

Press F1 to DC to pass through DC and A

C

components of measured signals of CH1 channel

.

Waveform display is also shown in following figure

:

Figure 2 2 S ynchronous dis play o f DC and A

C

components of signal
Press F1 to select grounding and set channels to
grounding mode. DC and AC components
contained by measured signals will be obstructed.
Waveform display is shown in following figure

:

displayed on the scr een

.

Setup of channel coupling㧦

1

7

Operatin g Manual for UTD2000/3000

Figure 2 Jammed DC component of signal㧙1

Setup of

A

C couplin

g

DC couplin

g

setup

Operating Manual for UTD2000/3000

(Note: Input signal still shall be connected to
channel circuit under such mode althoug

h

waveform is not

Figure 2 3 Synchronous obstruction of DC and

A

C components of signal

㧙

18

Ground couplin

g

setup

2.

Setup of cha nnel bandwidth limit㧦

Input one sine signal of about 40MHz for CH1 as an

example. It has to press [CH1] to open CH1 channel
then press [F2] to set bandwidth limit to OFF

.

Channel band width is full band width to pass

through high-frequency components contained by

measured signal. Waveform display is also shown

in following figure

.

Figure 2 Waveform display when closin

g

bandwidth limit

㧙4

Bandwidt

h

suppressio

n

20MH

z

Bandwidth suppression icon