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

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

h h

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

Ɣ

hr









Āā

Āā

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

Operating Man ual for UT D2000/30 00

1

9

Please press [F2] to set band width limitation to ON
for great attenuation of high-frequency component
and noise of more than 20MHz contained b

y

measured signals. Waveform display is also show

n

in following figure

.

Figure 2 5Waveform display when openin

g

bandwidth limit

It has to set probe attenuation coefficient i

n

operation menu of channel to coordinate wit

h

attenuation coefficient setup of probe. Probe
coefficient in channel menu shall be set to 10× if
probe attenuation coefficient is 10:1. It has to
analogize to guarantee correct voltage

.

Volt/grid gears of vertical deflection coefficient can

be divided into coarse tuning and fine tuning

.

Please refer to following figure for setup and

vertical gear when using 10:1 probe

.

㧙

㧦3. Setup of multiplying factor for probe

Close

bandwidt

h

limit

Probe

attenuatio

n

coefficient

Figure 2 Probe attenuation coefficient shown

in channel men

u

㧙6

Operating Manual for UTD2000/3000

4.

2

025

Regulation setup of vertical volt/grid Setup of reverse phase of waveform

Reverse phase of waveform:

㧦

㨪

㨪

㧙㧙



Volt/grid scope is 2mV/di

v

V/div (or 10V/div), or 1mV/div V/div with step
by way of 1 Deflection coefficient shall be
altered within current vertical gear scope by less
step during fine tuning so as to realize
uninterrupted and continuous adjustment of vertical
deflection coefficient within all vertical gears

.

5

20

Setup of
fine tunin

g

Figure 2 Coarse tuning and fine tuning of
vertical deflection coefficient

㧙7

It is to show overturning degree of phase location of
displayed signals. Please refer to Figure 2 for
waveform without reverse phase. Please refer to

Figure 2 for waveform with reverse phase

.

㧙㧙8

9

Without
reverse phase

Figure 2 Setup of reverse phase of vertical

channel (or without reverse phase

)

㧙8

Operating Manual for UTD2000/3000

2

1

Figure 2 9 Setup of reverse phase of vertical
channel

㧙

I. Realization of mathematical calculation

functio

n

Mathematical calculation functions are to show +, -

,

, / as well as FFT calculation results for CH1 and

CH2 channel waveform. Menu is shown as follows:

h

Reverse phase
of waveform

Mathematical calculation

Figure 2 Mathematical calculatio

n

㧙1

0

Operatin g Manual for UTD2000/3000

Analysis of FFT frequency spectrum

Time domain signal can be converted to frequency

domain signal when using mathematical calculatio

n

of fast Fourier transtable (FFT). Following types of

signals can be observed conveniently by usin

g

FFT

Measure harmonic content and distortion withi

n

measurement system

;

㧦

Ɣ

ƔƔShow noise characteristics in DC power

;

A

nalyze vibration

;

2

2

Function Menu

Setup Descriptio

n

Type

Mat

h

,.---hr

Informatio

n

source

CH1

CH

2

To set information source 1
as Ch1 channel waveform

.

To set information source 1
as Ch2 channel waveform

.

,

.

Information source 1
Information source

2

Information source 1
Information source

2

Information source 1
Information source

2

Information source 1
Information source

2

,

.

Ø

r

Operator

Informatio

n

source

2

CH1

CH

2

To set information source

2

as CH1 channel waveform

.

To set information source

2

as CH2 channel waveform

.

Form 2-2: Introduction to mathematical calculatio

n

Ø

r

Form 2-3: FFT menu Descriptio

n

FFT operation knack:

Signals with DC component or deviation will brin

g

in error or deviation of FFT waveform component

.

A

C coupling mode can be selected to reduce D

C

component.

A

verage obtainment mode of digital storage
oscillograph can be set to reduce random noise
and aliasing frequency component of repeated or
single pulse event

.

Operating Manual for UTD2000/3000

2

3

Functio

n

Setup

Descriptio

n

Typ

e

FFT

FFT mathematical
calculation

Informatio

n

source

CH1
CH

2

To set CH1 and CH2 as
calculation waveform

.

Window

Hammin

g

Blackma

n

Rectangle

Set Hanning window
functio

n

Set Hamming window
functio

n

Set Blackman window
functio

n

Set Rectangle window
functio

n

Hannin

g

Vertical unit

Vrm s
dBVrm

To set vertical unit to
Vrms or dBVrms

.

Operating Manual for UTD2000/3000

Selection of FFT window

Mathematical storage oscillograph will carry out FFT conversion for time record with limited length when
assuming continuous repetition of YT waveform. YT waveform will have the same amplitude in beginning
and ending locations for no interrupation. However, high-frequency transient interruption will be caused in
connector due to different waveform amplitudes for non-integral cycle of YT waveform. Such effect shall be
called as leakage in frequency domain. Therefore, value in forced beginning and ending locations is 0 b

y

multiplying original waveform by a window function to avoid leakage. Please refer to following form for
application of window function

.

Form 2-

4

24

FFT window

Characteristic

s

The most appropriate measurement content

Rectangle

The best frequency and the poorest
amplitude resolution to be basicall

y

similar to circumstances without window

;

Transient or short impulse with basically equivalent
signal level; Sine with equivalent amplitude wit

h

similar frequency; Wide band random noise of wave

spectrum with slow variation

;

Hannin

g

With excellent frequency resolution and
poor amplitude resolution by comparin

g

with rectangular window

;

Sine, cycle and narrow band random noise

Hammin

g

Frequency resolution of Hamming window
is better than that of Hanning window slightly

.

Transient or s hort impulse with large difference
for signal level

;

Blackma

n

The best amplitude resolution and the
poorest frequency resolutio

n

Mainly used for single-frequency signal to search

for higher order of harmonic wave

.

Operating Manual for UTD2000/3000

2

5

Term expl an atio n:
FFT resolution:

Nyquist frequency:

Reference waveform

It is defined as factor of samplin

g

and calculation point. FFT resolution increases
when sampling rate decreases for fixed calculatio

n

point quantity

.

Original waveform can not be
reset until using sampling rate of at least 2f for
waveform with the maximum frequency of “f”. It is
also called as Nyquist guideline. “f” refers to Nyquist
frequency and “2f” refers to Nyquist sampling rate

.

Please refer to waveform stored in nonvolatile
memory (NVM) of digital storage oscillograph or
peripheral U disk with name of RefA and RefB as
follows. Please operate acc ording to followin

g

steps to call out or close reference waveform

.

5. Please press REF menu key on the front panel
for 5.7-screen oscillograp

h

Please press [STORAGE]key and enter into the

second page to select call-out for 7-inc

h

oscillograph (namely, UTD2000L/2000EX series).

2. Please press [RefA] (RefA reference option) and

select information source then select its position b

y

rotating multi-purpose knob in upper part of front
panel. 1 10 (or 1 20) can be selected for the
position. Press “call-out” to call out waveform
which is stored inthe position originally after
selecting a certain position such as “1”. Pleas e
plug in U disk if waveform is stored in the U d isk

.

There are 2 options for magnetic disk as follows

:

DSO/USB; Please press [F2] key and select USB

.

(The menu can not be activated until plugging in U

disk.) Called out waveform is displayed on the
screen for waveform called out and stored from U
disk. Please press cancel key (F5) Return to
previous menu after waveform call-out

.

3. To press [RefB] (RefB reference option) and

select



㧧

information source 2 which participates i

n

calculation and method is the same to the
secondstep. Please measure and observe related
waveform by UTD2000/3000 series digital storage
oscillograph during actual application. Please
compare current waveform with reference
waveform for analysis. Please press REF key to
display reference waveform menu. Setup is also
shown in following form

.

Form 2-5 Selection of storage positio

n

It is allowed to select from 1 to 20 for internal
storage position. Please plug in U disk and press
F2 to select USB magnetic disk for external storage
instrument. Please refer to STORAGE menu for
waveform storage

.

Operating Manual for UTD2000/3000

2

6

Function menu

Setup

Descriptio

n

Storage positio

n

120a

12

0

a refer to positions of

20 groups of waveform

respectively

;

There are 200 groups of
waveform positions for
storage to USB

;

(Storage position and quantity

vary withmachine model.

)

Magnetic disk

DSO
USB

To select internal storage position;

To select external storagepositio

n

(until plugging inU disk)

;

Close

To close called out waveform

;

Callout

To call out selected wavefo rm;

Cancel

Return to previous menu;

Operating Man ual for UT D2000/30 00

2

7

Setup of horizontal system

Horizontal control knob
Control knob on horizontal surface can be used to
alter horizontal scale (or time base) to trigger
horizontal position (or trigger position) shown i

n

RAM. Vertical middle point toward horizontal
direction on the screen is time reference point for
waveform. Horizontal scale can be altered for
waveform extension or shrinkage by comparin

g

with screen center. Horizontal position can also
alter by comparing with position of waveform
trigger point

.

Horizontal position: To adjust horizontal position of
channel waveform (including mathematical
calculation). Resolution of such control key varies
according to time base

.

Horizontal scale: To adjust main time base, namely

,

s/div. Window width can vary with delay scannin

g

time base by rotating horizontal scale knob whe

n

opening extension time base. Please refer to
introduction to extension time base for details. (As
shown in the following form), horizontal menu ca

n

be displayed for horizontal control key menu

.

Form 2 -

6

Function menu

Setup

Descriptio

n

Main time base

1

.2.

To open main time base

;

To close view window

extensionaccordingtomai

n

time base after opening

;

View window
extensio

n

To open extension time base

;

Hold off

To regulate inhibition period

;

üü

üü

üü

üü

üü

Mark Description:

Trigger horizontal distance of position b

y

comparing with middle point of view window

.

ķ

ˊĸˊĹˊ

Ļ

ˊ

Mark represents position of current waveform

view window in RAM

Mark position of trigger point in RAM

.

Mark position of trigger point in current

waveform view window

.

Display horizontal time base (or main time

base), namely, s/div

.

ĺ

ˊ

Term explanation:

Y

-T mode:

X-Y mode:

Y axle refers to voltage and X axle

refers to time quantum under this mode

.

X axle refers to CH1 voltage and Y axle

refers to CH2 voltage under this mode

.

Slow scanning mode: Instrument will enter into
slow scanning sampling mode when settin

g

horizontal time base control to 100ms/div or less. It

is suggested to set channel coupling to DC whe

n

observing low-frequency signal by applying for
slow scanning mode

.

s-div: Time base control can expand or compress

waveform for horizontal scale (or time base) unit if

stopping waveform sampling (by using RUN/STOP

key).

Operatin g Manual for UTD2000/3000

2

8

Figure 2-11 Interface of horizontal system

Operating Manual for UTD2000/3000

2

9

View window extension

View window extension is to argument a section of
waveform to review image details conveniently

.

Setup of view window extension can not be slower
than that of main time base

.

A

s shown in above figure), it can be divided into

2

display areas under extension time base. Original
waveform is displaye d for upper part. Sel ected ar ea
can move horizontally by rotating horizontal

POSITION knob or increase or decrease by rotating

horizontal SCAL E knob

.

(

Waveform with horizontal extension in originall

y

selected waveform area is shown in lower part. (As
shown in above figure,) please pay attention that
resolution increases for extension time base b

y

comparing with main time base. Waveform displayed

by the entire lower party corresponds to area
selected for upper part so users can rotate horizontal
SCALE knob to reduce selected area and increase
extension time base, namely, horizontal extensio

n

multiple of waveform

.

ThemodemustbeusedforCH1andCH2atthe
same time

.

CH1 voltage will be displayed on X axle and CH

2

voltage

Extensio

n

time base

Horizontal extensio

n

of the waveform

Horizontally extended part of the waveform

Figure 2 1 Screen display under view window
extensio

n

㧙 2

Operatin g Manual for UTD2000/3000

will be displayed on Y axle after selecting X-

Y

display mode

.

Note: Digital storage oscillograph can capture
waveform by any sampling speed under normal X-

Y

mode. Similarly, it is allowed to adjust samplin

g

rate, vertical gear of channels and time base gear
under X-Y mode. Default sampling rate is 100MS/s
under X-Y mode. In general, sampling rate ca

n

reduce to gain excellent Lissajou’s figure. Followin

g

functions do not effect during X-Y display

.

Automatic testing mode

Cursor measurement mode
Reference or mathematical calculation waveform
View window extension functio

n

Trigger cont

rol

Ƶ
Ƶ
Ƶ
Ƶ
Ƶ

30

Figure 2 Waveform display under X-Y mode㧙1

3

Operatin g Manual for UTD2000/3000

3

1

Setup of trigger system

Trigger can determine data acquisition time and
waveform display for digital storage oscillograph. It
can convert instable display to meaningful
waveform once correct setup. Digital storage
oscillograph will collect sufficient data to map
waveform in the left side of trigger point firstly. It
will acquire data continuously and synchronousl

y

when waiting for trigger conditions. It also will
acquire sufficient data continuously to map
waveform in the right side of trigger point. Trigger
control area of operation panel of digital storage
oscillograph includes trigger level adjustment knob
and trigger menu key of [TRIG MENU]

;

5.7-inch oscillograph will set 50% of trigger level i

n

vertical middle point of signal (and realize
UTD2000L /2000EX by press [SET TO ZERO] key)

.

It has to press forced trigger key of [FORCE]

.

Trigger level: Trigger level will set signal voltage
which corresponds to trigger point

.

50%: To set trigger level to vertical point of trigger
signal amplitude

.

FORCE: To produc e 1 trigger signal forcefully for
mainly application for normal and single modes
shown in trigger modes

.

TRIG MENU: To trigger and set menu key

.

Operating Manual for UTD2000/3000

3

2

Trigger control

Trigger mode: Edge, pulse width, video and ALT TRIG

;

Edge trigger: Trigger when edge of trigger signal reaches a certain given level

.

Pulse width trigger: Trigger when pulse width of trigger signal reaches certain set trigger conditions
Video trigger: Carry out field or line trigger for standard video signals. (UTD2025CL/UTD2000EXseriesis
no such function.

)

A

LT TRIG: It is appropriate to trigger signal without frequency relevance. Various kinds of trigger menus

are also shown as follows

:

Edge trigger

:

Edge trigger mode is to trigger threshold value of input signal edge. That is, to trigger in ascending

/

descending edge of input signal when selecting “edge trigger”

.

Form 2-

7

Operating Manual for UTD2000/3000

3

3

Function menu

Setup

Descriptio

n

Type

Edge

Selection of
information source

CH1
CH

2

EXT
EXT/

5

Municipal power

A

lteratio

n

Set CH1 as trigger signal of info r ma ti on s ou rce

.

et CH2 as trigger signal of inf or m atio n sou r ce

.

Set EXT TRIG INPUT channel as trigge r sig na l of information sourc e

.

Divide outer trigge r so ur c e by 5 to ex pa nd outer trigger level sco pe

.

Set municipal powe r tri gg er

A

LT TR IG of CH1 an d CH2 si gn als ;

.

Gradient

A

scen

d

Descen

d

A

scend/descend

Set ascending edge trigger for signal

;

Set descending edge trigger for signal

;

Set ascending/descending edge trigger of signal

;

Trigger mode

A

utomatic
Normal
Single

Set waveform acquisition without detecting trigger conditions

;

Set waveform acquisition after meeting trigger conditions

;

Set sampling of a waveform and shutdown after detecting once
trigger

;

Trigger couplin

g

ACDC

High-frequenc

y

inhibitio

n

Low-frequenc

y

inhibitio

n

Obstruct DC component of input signal

;

Pass through AC & DC components of input signal

;

Inhibit high-frequency components of more than 80kHz for signal

;

Inhibit low-frequency components of less than 80kHz for signal

Operating Manual for UTD2000/3000

Pulse width trigge

r

Trigger time s hall be determined for pulse width trigger according to pulse width. You can capture
abnormal pulse by setting pulse width conditions

.

Form 2-8 (the first page

)

34

Function menu

Setup

Descriptio

n

Type

Pulse widt

h

Selection of
informatio

n

source

CH1
CH

2

EXT
EXT/

5

Municipal power

A

lteratio

n

To set CH1 as trigger signal of information source

.

To set CH2 as trigger signal of information source

.

To set EXT TRIG INPUT channel as trigger signal of information source.

To divide outer trigger source by 5 to expand outer trigger level scope.

To set municipal power for tri gger

.

A

LT TRIG of CH1 and CH2 signals

Pulse widt

h

conditions

More tha

n

Less tha

n

Equal t

o

To trigger when pulse width exceeds set value

;

To trigger when pulse width is less than set value

;

To trigger when pulse width is equivale

Pulse widt

h

setup

To set pulse wi dth of 2 0ns to 1 0s then regulate by multi -purpose knob in

upper part of front panel

.

Next page
1/

2

Enter into next page

.

Operating Manual for UTD2000/3000

3

5

Form 2-9 (the second page

)

Function menu

Setup

Descriptio

n

Type

Pulse widt

h

Trigger polarit

y

Positive pulse widt

h

Negative pulse widt

h

Trigger mode

To set positive pulse width as trigger signal

;

To set negative pulse width as trigger signal

;

A

utomatic
Normal
Single

The system will acquire waveform data automaticall

y

and display scanning base line on the screen without
trigger signal input. It will convert to trigger scannin

g

automatically when producing trigger signal

.

To produce trigger scanning if any trigger signal is produced

.

To produce once trigger then stop during trigger signal input

.

Trigger couplin

g

D

C

AC

High-frequenc

y

inhibitio

n

High-frequency inhibitionTo pass through AC & D

C

components of trigger signal

.

To obstruct DC components of trigger signal

.

To obstruct pass through of high-frequency c omponents of
signal and only low-frequency components can pass through

.

Previous page
2/

2

Return to previous page

.

Operatin g Manual for UTD2000/3000

Video touc

h

To trigger in field or row with NTSC or PAL standard video signals after selecting video trigger for
UTD2025CL oscillograph shown in 5.7-inch or 7- inch screen. Trigger coupling is pre-set to DC. P lease
refer to following form for trigger menu

.

Form 2-10 Setup of video trigger

3

6

Function menu

Setup

Descriptio

n

Type

Selection of

Pulse widt

h

information source

CH1
CH

2

EXT

To set CH1 as trigger signal of information source

.

To set CH2 as trigger signal of information source

.

To set EXT TRIG INPUT channel as trigger signal of
information source

.

To set 5 times of attenuation for outer trigger signal as trigger
signal

.

A

LT TRI G of CH1 and CH2 signals

EXT/

5

A

lteratio

n

Standar

d

PA

L

NTS

C

Video signal to be appropriate to PAL system

;

Video signal to be appropriate to NTSC system

;

Synchronizatio

n

A

ll rows

Designated row

Odd f iel

d

Even fiel

d

To set synchronous trigger of video row

.

To set synchronous trigger of designated video row for
adjustment by multifunctional knob in upper part of front panel

.

To set synchronous trigger for video odd field

.

To set synchronous trigger for video even field

.

Operating Man ual for UT D2000/30 00

3

7

Please refer to Figure 2-14 for screen display whe

n

selecting standard system of PA L and row
synchronization as synchronization mode. Please
refer to Figure 2-15 for field synchronization of
synchronization mode

.

Figure 2 14 Video trigger: Row synchronizatio

n

㧙

Figure 2 15 Video trigger: Field synchronizatio

n

㧙

A

LT TRIG mode

A

LT TRIGTrigger signal comes from 2 vertical
channels durin g ALT TRIG. Suc h trigge r mode can be
adopted for synchronous observation of 2 signals
without regard to signal frequency. Please refer to
following figure for trigger alternation waveform
display

.

Setup of trigger coupling mode

Please enter into trigger setup menu for setup of
trigger coupling mode and gain the most sform
synchronization. Please refer to following form for
menu of trigger coupling mode

.

Operating Manual for UTD2000/3000

Form 2-11 Trigger alternation menu

Function menu

Setup Descriptio

n

Type

Edge

Set trigger mode to edge

Trigger source

A

lternatio

n

A

LT TRIG of CH1 and

CH

2

Gradient

A

scendin

g

Set trigger gradient to
ascending edge

.

Trigger mode

A

utomatic

Set trigger mode as
automatic one

Trigger couplin

g

AC

Set trigger couplin

g

modeto AC mode

Figure 2 Observation of 2 signals wit

h

different frequency by

.

㧙16

3

8

Form 2-1

2

Operating Manual for UTD2000/3000

3

9

Function menu

Setup

Descriptio

n

Type

Trigger source

Gradient

Trigger mode

Coupling

ACDC

High-frequency inhibitio

n

Low-frequencyinhibitio

n

Set pass-throu gh obstr ucti on of DC compone nts

.

Set pass-through of all components

.

Obstruct pass-through of high-frequency part of signal. Only low­frequency components can pass through

.

Obstruct pass-through of low-frequency part of signal. Only high­frequency components can pass through

.

üü

üü
üü

üü

Adjustme nt of hold off time

A

djustment of hold off time can be used to observe complex waveform (such as pulse s tring series)

.

Inhibition time refers to waiting period of digital storage oscillograph to start up trigger circuit again

.

Digital storage oscillograph will not trigger until inhibition time ends during inhibition period. For instance

,

as shown in Figure 2-17, the first pulse among a group of pulse series shall be triggered to set inhibition
time to width of pulse string

.

Please refer to following form for hold off menu

.

Form 2-1

3

Operating Manual for UTD2000/3000

40

Function menu

Setup

Description

Main time base

1. To open main time base

;

2. To close view window extension according to main t ime base after openin

g

view window extension

.

View window extensio

n

To open extension time base

.

Hold off

To adjust inhibition time

.

üü

üü

üü

üü

Operating Manual for UTD2000/3000

4

1

Figure 2—17 Hold off used for synchronization
of complex waveform

Operation Description

1. To select edge, trigger source and gradient show

n

in TRIG MENU according to synchronization mode of
normal signal then adjust trigger level for stable
waveform display as practicable as possible

.

2. To press HORI MENU key to display horizontal
menu

.

3. To adjust multi-purpose knob in upper part of
panel to alter inhibition time for stable waveform

display as practicable as possible

.

Term explanations

1. Trigger source: To gain trigger from many kinds of

information sources, namely, input channel (CH1

&

CH2), external trigger (EXT & EXT/5) and municipal

power

.

Input channel The most common trigger
information source is optional input channel
Selected one is used as channel of trigger

information source for normal operation regardless

of input displa

y

External trigger: Such trigger information source

can be used for trigger on the third informatio

n

channel during synchronous data acquisition o

n

channels For instance signals f rom external clock

or circuit t

o

meas

ure can be used as trigger information source

.

EXT and EXT/5 trigger sources shall use external
trigger signals

Ƶ

 



Ƶ





Trigger

Holdoff

connected to EXT TRIG interface. Signal can be
used for EXT and EXT can be used within signal
trigger level scope of -3V to +3V

.

A

utomatic trigger: The system will acquire

waveform data automatically so as to displa

y

scanning base line on the screen without trigger
signal input. It will convert to trigger scannin

g

automatically for signal synchronization whe

n

producing trigger signal

.

It is allowed to select EXT/5 for oscillograph of 5.7­inch screen. Outer tri gger shall be divided by 5 so
that trigger scope can expand to -15V to +15V for
trigger of digital storage oscillograph under large
signal

.

Municipal power: Such trigger mode can be used

to observe signal with regard to municipal power

.

For instance, it can provide relationship betwee

n

lighting equipment and power supply equipment so
as to gain stable synchronization

.

2 Trigger mode: It is to determine behavior mode
of digital storage oscillograph without trigger event

.

This digital storage oscillograph can also provide

3

triggers, namely, automatic, normal and single
trigger modes

.

Ƶ



Ƶ

Operating Manual for UTD2000/3000

4

2

Note: Without trigger signal is allowed under

“

automatic” mode when setting scanning waveform to
5-ms/div or less time base

.

Normal trigger: Digital storage oscillograph ca

n

not acquire waveform until meeting trigger conditions
under ordinary trigger mode. Trigger scanning can be
produced when producing trigger signal

.

Single trigger: User can press “operation” button

once under single trigger mode for entry and trigger

waiting for digital storage oscillograph. It will sample
and display all acquired waveform then stop after
digital storage oscillograph detects once trigger

.

Ƶ

Ƶ

Operatin g Manual for UTD2000/3000

4

3

3

.

4. Pre-trigger/delay trigger: To trigger data acquired
in ahead/after event. Trigger position is often set i

n

the horizontal center on the screen. You ca

n

observe pre-trigger and delay information of 5di

v

(or 6div). You can also rotate horizontal position to
regulate horizontal displacement of waveform and

review more pre-trigger details. You can observe
waveform in ahead of trigger by observing pre­trigger data. For instance, burring reason can be
shown by observation and analysis on pre-trigger
data after capturing burring during circuit startup

.

Trigger coupling: Trigger coupling can determ ine
category of signal component conveyed to trigger
circuit. Coupling types include DC, AC, low­frequency inhibition and high-frequency inhibition

.

Pass through all components of signals under

DC mode

.

Ƶ

Ƶ

Ƶ

Ƶ

Obstruct DC components with signal attenuatio

n

to be less than 400Hz under AC mode

.

Obstruct DC components with attenuation of
low-frequency component of less than 80kHz under
“low-frequency inhibition” mode

.

A

ttenuate high-frequency components of more

than 80kHz under “high-frequency inhibition” mode

.

Operating Manual for UTD2000/3000

Setup of sampling system

As shown in following figure, ACQ UIRE in
control area is function key of sampling
system

.

Figure 2 18 Function key of sampling system
User can use ACQUIRE key to pop out samplin

g

setup menu so as to adjust sampling mode b

y

control button shown in the menu

.

㧙

44

Operating Manual for UTD2000/3000

4

5

Form 2-14 Sampling men

u

Function menu

Setup

Descriptio

n

Obtainment mode

Samplin

g

Peak-value detectio

n

A

verage

A

ctivate ordinary sampling mode

.

A

ctivate peak-value detection mode

.

Set average sampling mode and display average times

.

A

verage times

2~25

6

Set average times for step by multiples of 2, namely, 2, 4, 8, 16

,

32, 64, 128 and 256. As shown in Figure 2-18, average times ca

n

alter by pressing left multi-purpose knob

.

Sampling mode

Real-time
Equivalent

Set sampling mode to real-time sampling mode

.

Set sampling mode to equivalent sampling mode

.

Fast acquisitio

n

O

N

A

cquire by higher screen refreshing rate to reflect dynamic

effect of waveform excell ently

.

Close fast acquisition

.

It has to observe waveform display variation b

y

altering obtainment mode. Please refer to Figure 2­19 and 2-20 for sampled waveform display if signal
contains large noise when adopting 32 times of
average mode or without adopting average mode

.

Operating Manual for UTD2000/3000

4

6

Figure 2-20 Waveform by adopting 32 times of average mode

Figure 2 Waveform without adoptin

g

㧙1

9

Note

Please select real-time sampling mode for observation

of single signal

.

2. Please select equivalent sampling mode for observatio

n

of high-frequency periodic signal

.

3. Please select peak-value detection mode to avoid mixed
signal envelope. Please select average sampling mode wit

h

step of multiples of 2 for average value to reduce random
noise of displayed signal. Average times can be selected

form 2 to 256.

㧦



1

Term explanatio

n

Real-time sampling: It refers to data required for once acquisition

.

Equivalent sampling: It refers to repeated sampling mode. It can facilitate careful observation of repeated
periodic signals. It can be adopted to gain horizontal resolution which is higher than real-time sampling
resolution greatly

.

Sampling mode: It can be classified into equivalent and real-time modes

.

Peak-value detection mode

:

Digital storage oscillograph will find out the maximum and minimum input signals within ev ery sampling
interval for waveform display by using such values under such obtainment mode. It can also obtain and
display narrow impulse or they may be omitted for larger noise under such mode. Average mode is as
follows: Digital storage oscillograph may obtain several waveform and calculate average value then
display final waveform under this obtainment mode. Such mode can be adopted to reduce random noise

.

Operating Manual for UTD2000/3000

4

7

Operating Manual for UTD2000/3000

Setup of display system

A

s shown in following figure, DISPLAY in control area is function k ey of display sy stem

Figure 2 Function key of sampl ing system
Please press DISPLAY button to pop out setup menu shown in following figure. Display mode can be
adjusted by pressing menu control button

.

㧙



4

8

Operatin g Manual for UTD2000/3000

4

9

Key points

:

Display type: To fill in blank between adjacent sampling points during vector display. Only sampling points
will be displayed for point display

.

Function menu Setup

Description

s

Display type

Vector point

Only to display sampling points by wiring

.

Format

YT
X

Y

Operation mode of digital storage oscillograp

h

X-Y display mode; X input for CH1 and Y input for CH2

;

Continuous

Close
1s
2s
5s
Infinite

Real-time updating of screen waveform

;

To update after keeping waveform data shown in the screen for 1s

;

To update after keeping waveform data shown in the screen for 2s

;

To update after keeping waveform data shown in the screen for 5s

;

To always keep display of original waveform data shown in the screen
until this function is inactivated if new data is added into displa

y

continuously

;

Waveform brightness

1% - 100%

To set waveform brightness (without this function for
UTD2000C/3000C

)

Form 2-15 Display menu

Storage and callout

A

s shown in following figure, STORAGE in MENU

control area is f unction k ey of storage system

.

Operation steps
Please press STORAGE Enter into type menus

.

There are 3 types, namely, waveform, setup and
bitmap

.

Please refer to Figure 2-16 for selection of type

waveform and entry into following waveform
storage menu. Please call out REF (reference

waveform shown in the second page) from Section

2 of the chapter after saving waveform

.

Form 2-16 Waveform storage menu (the first page)

㧦

2.

Operating Manual for UTD2000/3000

50

Figure 2 22 Function key (storage) for sampling system
STORAGE key can be used to display storage setup menu. You
can save oscillograph waveform or setup status to internal
storage area or U disk to call out saved waveform by Ref

A

(or RefB) or call out setup status by STORAGE key. Waveform
display area of oscillograph can be saved to DSO contents in U
disk in a form of bitmap. Saved bitmap can be read by PC computer

.

㧙

Operatin g Manual for UTD2000/3000

5

1

Form 2-16

Function menu

Setup

Descriptio

n

Type

Wav e form

Select waveform storage and callout menu

Information source

CH1
CH

2

Select waveform from CH1 channel

.

Select waveform from CH2 channel

.

Storage positio

n

120a

12

0

a refer to positions to store 20 groups of waveform

.

There are 200 groups of waveform positions for storage to USB

.

(Storage position and quantity vary with machine model.

)

Save

Save wavef orm

Next page
1/

2

Enter into next page

.

Figure 2-23 Waveform storage

Figure 2-24 Waveform storage by U disk

üü

üü

Operatin g Manual for UTD2000/3000

Form 2-17 Storage menu (the second page

)

5

2

Function menu

Setup

Descriptio

n

Magnetic disk

DSO
USB

To select internal RAM of digital storage oscillograph the

n

select external U disk. (This function can not be used until
plugging in U disk.

)

Storage dept

h

Ordinar

y

Long storage

To set storage depth to ordinary; (Callout only can be done i

n

REF area when saving data to U disk.

)

To set storage depth to long storage. (Note: This function ca

n

not be activated until plugging in U disk. Callout can not be
done until using loading function of computer communicatio

n

software or waveform analysis load when saving data to U disk.

)

Previous page
2/

2

Return to previous page

.

üü

2

A

s shown in Form 2-18, please select setup and enter into setup storage menu

.

Figure 2-25 Storage setup

Form 2-18 Setup of storage menu

5

3

Operating Manual for UTD2000/3000

Function menu

Setu

p

Description

Setup

To select panel setup menu

.

Setup of (storage position

)

12

0



Operation setup to save 20 groups of panels: To select by multi

-

purpose knob in upper part of front panel. (Position and quantit

y

vary with machine model

Save

Storage setup

Recall

Callout setup

54

3

.

A

s shown in Form 2-19, please select bitmap for entry into bitmap storage menu

.

Remark: This function can not be called out until plugging in U disk

.

Form 2-19 Bitmap storage menu

Operating Manual for UTD2000/3000

Function menu

Setup

Descriptio

n

Bitmap

Select bitmap menu

Storage positio

n

12

0



200 bitmap data can be saved by selecting multi-purpose knob in

upper part of front panel. (It is 1 to 10 for UTD2000C series.

)

Save

Save bitmap data

üü

üü

Figure 2-26 Bitmap storage

Setup of auxiliary functions

A

s shown in following figure, UTILITY in MENU

control area is function key

.

Figure 2 27 Function key (and function) of
samplin

g

User can press UTILITY key to pop out setup menu
of auxiliary system function

.

Form 2-20 (the first page

)

㧙

5

5

Operating Man ual for UT D2000/30 00

Function menu

Setup

Descriptio

n

Self-correctio

n

Cancel

To carry out self-correction

.

To cancel self-correction and
return to previous page

.

Executio

n

By detectio

n

Please refer
to Form 2-2

3

To set waveform Pass/Fail

.

(Only UTD2000E/3000E

,

UTD2025C/3025C and
UTD2025CL have this
function.

)

Waveform
recordin

g

Please refer
to Form 2-2

2

Set waveform recordin

g

operation

.

Language Multilanguage

Select interface language

.

5

6

Operating Manual for UTD2000/3000

Form 2-21-1 (the second page

)

Function menu

Function menu

Setup

Setup

Descriptio

n

Descriptio

n

Fast correctio

n

ON/OFF

A

ctivate/inactivate fast correction function of channels within scope

of 2mV/div to 10 mV/div. (Only UTD2025C/3025C has this function.

)

Interface style

The first style
The secondstyle
The third style
Thefourthstyle

Set 4 interface styles for digital storage oscillograph

.

Gridding brightness

1% - 100%

A

djust gridding brightness of the screen by multi-purpose knob

.

UTD2000C/3000C also has no this function

.

Next page
2/

3

Enter into next page

.

Form 2-21-2 (the third page

)

üü

System informatio

n

Display information of current oscillograph system

.

Frequency meter

A

ctivate/inactivate function of frequency meter

.

The first page
3/

3

Return to the first page

.

Form 2-22 Waveform recording menu

5

7

Operatin g Manual for UTD2000/3000

Function menu

Setup Descriptio

n

Information source

CH1
CH

2

CH1+CH

2

Select CH1 as recording signal source

.

Select CH2 as recording signal source

.

Select ct CH1+CH2 as recording signal source

.

Operatio

n

Record by pressing recording key for synchronous display of
recorded quantity in lower part of the screen

.

1.Playback key

;

2. Press the key f or playback and display of current playback
screen No. in lower right corner of screen. Playback can be
stopped by rotating multi-purpose knob controller in upper part
of panel. However, waveform of a certain screen can be selected
for repeated playback by continuing to rotate it

.

3Press to stop then press for playback of all items

.

ƽ

Ƶ

Ƶ

Stop recordin

g

Save

1~20

0

Save newly recorded waveform for U disk plug-in. Storage
position can be selected by multi-purpose knob

.

Recall

1~20

0

Call out recorded wavef orm from U disk then sele ct recor din

g

position by multi- purp ose kno b

.

Retur

n

Return to previous level of menu

.

üü

5

8

Operating Manual for UTD2000/3000

Form 2-23 By detectio

n

Function menu

Setup

Descriptio

n

Detection status

Ope

n

Close

Open/close information of waveform pass/fail times

Information source

CH1
CH

2

MAT

H

Ref

A

RefB

Select CH1 as detected signal source

.

Select CH2 as detected signal source

.

Select MATH as detected signal source

.

Select RefA as detected signal source

.

Select RefB as detected signal source

.

Output conditions

Pass
Pass/Halt
Fail/Halt
Fail

Output concurrency prompt when detecting waveform pass

;

Output and pause when detecting waveform pass

;

Output and pause when detecting waveform fail

;

Output concurrency when detecting waveform fail

;

Tem p la te set up

Refer to Form
2-24 for details

Enter into template setup menu

.

Retur

n

Return to previous menu

.

5

9

Key note:Key note

:

Self-correction: Self-correction procedure is to
correct measurement error caused by digital
storage oscillograph due to ambient variation. You
can operate the procedure according to demand

.

Please open power of digital storage oscillograp

h

then wait for instrument pre-heating for 30 minutes
for more correct calibration. Please press UTILIT

Y

key (as an auxiliary function) for operatio

n

according to prompt shown in the screen

.

Language selection: There are many kinds of
languages for UTD2000/3000 series digital storage
oscillograph. Please press UTILITY me

n

u butto

n

and select appropriate language

.

Operatin g Manual for UTD2000/3000

Form 2-24 Template s etup

Function menu

Setup

Descriptio

n

Template output

Set horizontal and vertical
Pass/Fail tolerance scope
accordingtoadjustment

Horizontal 1-200Pixel

Set horizontal tolerance
scope

Vertical

1-100Pixel

Setvertical tolerance scope

Retur

n

Return to Pass detectio

n

men

u





60

Automatic measurement

A

s shown in following figure, MEASURE is
automatic measurement function key. You can be
familiar with powerful automatic measurement
function of UTD2000/3000 series digital storage
oscillograph gradually by following introduction

.

Application example

Measurement menu of such series of oscillograp

h

can be used to measure 28 kinds of waveform
parameters. User can press MEASURE key Enter

into parameter measurement display menu firstly.

The menu includes 5 areas to display measurement
value at the same time. They correspond to functio

n

keys of F1 to F5 res pectively. Please press
corresponding F keys Enter into measurement

category selection menu if measurement category

shall be selected for any area. Measurement
category selection menu can be classified into
voltage and time kinds Enter into voltage or time
measurement category respectively. Please press
F1 to F5 to select measurement category the

n

return to parameter
measurement display menu. In addition,user ca

n

Operating Manual for UTD2000/3000

Figure 2-28 Function key (automatic measurement

)

of sampling system

press F5 to select “All parameters” to dis play all
voltage/time measurement parameters. User ca

n

press F2 to select channel to measure. (Channel is
ineffective until opening.) User can press F1 Retur

n

to parameter measurement display menu if not
altering current measurement category. The first
example: Steps are as follows if displayin

g

measured peak value of CH2 channel in F1 area

.

1. To press F1 key Enter into measurement
category selection menu

;

2. To press F2 to select CH2

;

3. To press F3 to select voltage

;

4. To press F5 (shown in the second page, 2/4) to
see that F3 position is “peak value

”

5. To press F3 to select “peak value” and return to
parameter measurement display menu
automatically

;

Peak value is display ed in F1 area on the
homepage of measurement menu

.

The secondexample: Setup of delay measurement:

Delay measurement function is used for interval
between ascending edges of 2 information sources

,

namely, interval from ascending edge of the first
cycle of a certain information source to that of the
first cycle of additional information source

.

Measurement steps are as follows

:

1. To refer to above example and select area
displayed by delay measurement value after
entering into measurement menu (shown in 3/

3

page of time category)

;

2. To select reference information source of CH1
then select delay information source of CH2

;

3. To select reference information source of
then select delay information source of CH2

;

4. To press F5 to confirm that delay measurement is
displayed in selected area

.

CH

1

6

1

Operatin g Manual for UTD2000/3000

Automatic measurement of voltage parameters

Voltage parameters which can be measured b

y

UTD2000/3000 series oscillograph automaticall

y

are as follows

:

Peak value (Vpp): Voltage from the highest
waveform point to the lowest waveform point

;

The maximum value (Vmax): Voltage from the
highest waveform point to GND (ground)

;

The minimum value (Vmi n): Voltage from the lowest
waveform point to GND (ground)

;

Middle value (Vmid): Half of sum of waveform top
and bottom voltage

;

A

mplitude (Vamp): Voltage from waveform top to

bottom

;

Middle value (Vmid): Half of sum of waveform top
and bottom voltage

;

Top value (Vtop): Voltage from flat waveform top t

o

GND (ground)

;

Bottom value (Vbase): Voltage from waveform

bottom to GND (ground);

Overshoot: Ratio of difference of the maximum
waveform value and top value and amplitude

;

Preshoot: Ratio of difference of the minimum

waveform value and bottom value and amplitude;

A

verage value: Average amplitude of signals withi

n

a cycle

;

Root-mean-square (Vrms): It is effective value

.

Root-mean-square refers to DC voltage of
converted energy within 1 cycle according to A

C

signal to correspond to equivalent energy

.

Operating Manual for UTD2000/3000

6

2

Automatic measurement of time parameters

UTD2000/3000 series oscillograph can measure
signal frequency, cycle, ascending time

,

descending time, positive pulse width, negative
pulse width, delay (of 9 combinations), positive dut

y

cycle, negative duty cycl e and 10 time parameters
automatically. Definitions of such time parameters
are as follows

:

RiseTime: It refers to period when waveform
amplitude increases from 10% to 90%

;

FallTime: It refers to period when waveform
amplitude decreases from 90% to 10%

;

Positive pulse width (+Wi dth): It refers to pulse
width of positive pulse under 50% of amplitude

;

Negative pulse width(-Width): It refers to pulse
width of negative pulse under 50% of amplitude

;

Delay (ascending edge): It refers to delay from
ascending edge to ascending edge

;

Delay (descending edge): It refers to delay from

descending edge to descending edge

;

Positive duty cycle (+Duty): It refers to ratio of
positive pulse width and cycle

;

Negative duty cycle (-Duty): It refers to ratio of
negative pulse width and cycle

;

Operation Description: Please press MEASURE

key so that the screen can display 5 measurement

values. As shown in Form 2-25, user can press any

key of F1 to F5 so that the screen enters into

me

asurement selection menu

.

Measurement menu

Operatin g Manual for UTD2000/3000

6

3

Operating Manual for UTD2000/3000

64

Form 2-2

5

Function menu

Setup

Descriptio

n

Retur

n

Return to parameter measurement display menu

.

Information source

CH1

Select channel of measurement parameters

.

CH

2

Select channel of measurement parameters

.

Voltage kin

d

Enter into voltage parameter menu

.

Time kin

d

Enter into time parameter menu

.

A

ll parameters

Display/close all measurement parameters

.

Form 2-2

6

Function/measurement item

Descriptio

n

Retur

n

Return to menu shown in Form 2-25

.

Preshoot

Return to parameter measurement display menu and
substitute original position parameter after selection

.

A

mplitude

he same as above

Overshoot

The same as above

Next page (1/4

)

Page turnin

g

Of which: Menu included by “voltage kind” is shown i n Form 2-26 to 2-29

.

6

5

Form 2-27

Function/measurement item

Function/measurement item

Descriptio

n

Descriptio

n

Operating Man ual for UT D2000/30 00

Previous page

Return to previous page

.

A

verage value

Return to parameter measurement display menu and substitute
original position parameter after selection

.

Peak value

he same as above

he same as above

Root-mean-square
Next page (2/4

)

Page turnin

g

Form 2-2

8

Previous page
Top value

Return to previous page

.

Return to parameter measurement display menu and substitute
original position parameter after selection

.

Bottom value

The same as above
The same as above

Middle value

Next page (3/4

)

Page turnin

g

6

6

Operatin g Manual for UTD2000/3000

Function/measurement item

Function/measurement item

Descriptio

n

Descriptio

n

Previous page

Retur

n

Return to previous page

.

Return to menu shown in Form 2-25

.

The maxim um value

Frequenc

y

Return to parameter measurement display menu and substitute
original position parameter after selection

.

Return to parameter measurement display menu and substitute
original position parameter after selection

.

The minimum value

Cycle

The same as above

The same as above

Next page (4/4

)

Next page (1/3

)

Return to the first page (shown in Form 2-26

)

Page turnin

g

Form 2-2

9

Form 2-3

0

üü üü

Menu included by “time category” is shown in Form 2-30 to Form 2-32

.

The same as above

RiseTime

6

7

Operatin g Manual for UTD2000/3000

Function/measurement item

Function/measurement item

Descriptio

n

Descriptio

n

Previous page

Previous page

Return to previous page

.

Return to previous page

.

Frequenc

y

Dela

y

Return to parameter measurement display menu and substitute
original position parameter after selection

.

Enter into delay option menu (shown in Form 2-32a) after
selection

.

Cycle

Positive duty cycle

The same as above

Return to parameter measurement display menu and substitute
original position parameter after selection

.

Next page (2/3

)

The first page (3/3

)

Page turnin

g

Return to the first page (shown in Form 2-30)

.

Form 2-31

Form 2-3

2

The same as above

The same as above

RiseTime

Negative duty cycle

Cursor measurement

User can press CURSOR button to displa

y

measurement cursor and cursor menu then use
multi-purpose knob controller to alter cursor

position. As shown i n following figure, CURSOR in

MENU control area is cursor measurement functio

n

key

.

Figure 2-29 Function key (or cursor) of samplin

g

system

6

8

Operating Manual for UTD2000/3000

Return to parameter
measurement display men

u

and substitute original
position parameter after
selection

.

Form 2-32a

Functio

n

Setup

Descriptio

n

Channel

Channel

CH1/CH

2

/MAT

H

CH1/CH

2

/MAT

H

Select measured channel

.

üü
üü

üü
üü

Enter

User can move cursor for measurement under
CURSOR mode. There are 3 modes, namely, voltage

,

time and tracing. V can be measured by pressin

g

SELECT and COARSE keys on the panel and multi­purpose knob controller to adjust positions of

2

cursors respectively during voltage measurement

.

Similarly, it can b e measured if selecting time. Cursor
of digital storage oscillograph can also trace signal
variation automatically under tracing mode wit

h

waveform display

.

Remark: For 5.7-inch oscillograp

h

୞

1. Effect of SELECT key is to select the cursor

.

2. Effect of COARSE key is to adjust movement speed
of cursor

.

For 7-inch oscillograph

:

User can press multi-function knob key to select the
cursor. Movement speed of cursor can also alter
according to rotation speed

.

1. Voltage/time measurement mode: The first or

secondcursor will appear at the same time. Cursor
position on the screen can be adjusted by multi­purpose knob controller. User can press SELECT ke

y

(or multi-function knob key) to select cursor to adjust

.

Displayed reading is also time or voltage between

2

cursors

.

2. Tracing mode:Horizontal and vertical cursors ca

n

intersect to become a crossing cursor. Crossin

g

cursor can position on the waveform automatically to

adjust horizontal position of crossing cursor on the
waveform by rotating multi-purpose knob controller

.

Digital storage oscillograph can also displa

y

coordinate of cursor point at the same time

.

3. Measurement value will be displayed in upper
right corner of the screen automatically whe

n

opening cursor function

.

Operating Manual for UTD2000/3000

6

9

Usage of operation ke

y

RUN/STOP key is in upper right corner of front
panel of digital storage oscillograph. User ca

n

press the key so that green lamp is on to show
operation status. Red lamp can be on after pressin

g

the key to show stop status

.

Figure 2-30 Operation/stop ke

y

A

s shown in above figure, automatic setup is to

simplify operation. Digital storage oscillograph ca

n

adjust vertical deflection coefficient and horizontal

time base gear automatically for stable waveform
display on the screen according to waveform
amplitude and frequency when user presses AUTO
key. System setup is shown in following form durin

g

automatic setup

:

Automatic setup

Operatin g Manual for UTD2000/3000

70

RUN/STOP: To acquire waveform or stop

acquisition continuously;

The key can be pressed for switchover of waveform

sampling between operation and stop. User ca

n

press the key under operation status so that green

lamp is on. “Auto” can be displayed in upper part of

the screen. Old digital storage oscillograph ca

n

acquire waveform continuously while red lamp is o

n

by pressing the key under stop status. Digital
storage oscillograph can stop acquisition whe

n

displaying “Stop” in upper part of the screen

.

Operatin g Manual for UTD2000/3000

7

1

Functio

n

Setup

Obtainment mode Samplin

g

Display format

Set to YT

Horizontal positio

n

A

utomatic adjustment

A

djustment according to signal

frequenc

y

Second/gri

d

Trigger couplin

g

AC

Hold off

The minimum value

Trigger level

Set to 50%

A

utomatic

Trigger mode

Trigger source

Set to CH1; Set to C H2 whe

n

exerting on signal for it if there
is no signal for CH1

;

Trigger gradient

A

scendin

g

Trigger type

Edge

A

llVertical band widt

h

Volt /g ri

d

A

djustment according to signal

amplitude

Operating Manual for UTD2000/3000

7

2

Chapter 3: Applicatio n Example

The first example: Measurement of simple signal

It has to observe a unknown signal in the circuit for
quick display and measurement of signal frequenc

y

and peak value

.

2

1. Please operate according to following steps for
quick signal display

:

1. Please operate according to following steps for
quick signal display

:

To set probe menu attenuation coefficient to 10*

and set switch on the probe to 10*

.

To connect CH1 probe to measured point of

circuit

.

To press AUTO button

.

Digital storage oscillograph can set automaticall

y

for the best waveform display.You can al so adjust
vertical or horizontal gear on above basis so that
waveform display can meet related requirements

.

A

utomatic measurement of signal voltage and

time parameters

Digital storage oscillogra

ph can measure most of
display signals automatically. Please operate
according to following steps for measurement of
signal frequency and peak value

.

To press MEASURE key to display automatic

measurement menu

;

To press F1 to enter into measurement menu

category for selectio

n

To press F3 to select voltage categor

y

To press F5 to turn to 2/4 page then press F3 to

select measurement type of peak value

To press F2 to enter into measurement menu
category for selection then press F to select
time categor

y

ķ



ķ

ĸ


Ĺ
ĺ



Ļ





ྚ

ྛ

ļ

To press F2 to select measurement type of

frequency.

Operating Manual for UTD2000/3000

7

3

The secondexample: Delay observation of sine

wave signal by circuit

The same as above example, please set

attenuation coefficient of probe and digital storage

oscillograph to 10*. Please connect CH1 channel

of digital storage oscillograph to circuit signal input

terminal and connect CH2 channel to output
terminal

.

Operation steps

:

1. Signal display of CH1 and CH2 channels

:

To press AUTO button

To continue to adjust horizontal or vertical gear
so that waveform display can meet your test
requirements

.

To press CH1 key to select CH1 then rotate
vertical position knob to adjust vertical positio

n

of CH waveform

To press CH2 key to select CH2 then adjust
vertical position of CH2 waveform to facilitate

ķ
ĸ

Ĺ



ĺ



Figure 3-1 Automatic measurement

Operating Manual for UTD2000/3000

74

comparison without waveform overlapping for the
first and second channels

.

2. To measure delay of sine signal caused b

y

circuit then observe waveform variation.

ķĸDelay of automatic measurement channel

To press MEASURE button to display automatic
measurement menu

;

To press F1 key to enter into measurement menu
category for selection

;

To press F4 key to enter into time measurement
parameter list

;

To press F5 key twice to enter into 3/3 page

;

To press F2 key to select delay measurement

;

To press F1 key to select CH1 then press F2 key to
select CH2 then press F5 as enter ke

y

You can see delay value from “CH1-CH2 delay” i

n

F1 area

.

Observation of waveform variation (shown i

n

following figure

)

Figure 3-2: Waveform dela

y

Operating Manual for UTD2000/3000

7

5

The third example: Capture of single signal

A

dvantages and characteristics of digital storage
oscillograph include convenient capture of
aperiodic signals such as pulse and burring, etc. It
has to know this signal to set trigger level and
trigger edge to capture a signal signal. For
instance: Trigger level shall be set to about 2V and
set trigger edge to ascending edge trigger if pulse is
a logic signal of TTL level. User can observe it b

y

automatic or ordinary trigger mode so as to
determine trigger level and trigger edge for
unknown signals

.

Operation steps are as follows

:

1. To set attenuation coefficient of probe and CH1
channel like the previous example

;

2. To set triggers

;

To press MENU button in trigger control area to

display trigger setup men

u

To set trigger type to edge, trigger source to CH1

,

gradient to ascend, trigger mode of single mode and
trigger coupling to AC by using menu operation keys
of F1 to F5 respectively under this menu

.

To adjust horizontal time base and vertical gear to

appropriate scope

To rotate TRIGGER LEVEL knob to adjust

appropriate trigger level

To press RUN/STOP execution button to wait for

signals which meet trigger conditions. Once

sampling can be done for display on the screen if a

certain si

gnal reaches set trigger level. Occidental

events can be captured easily by utilizing t he
function. For instance: Sudden burring with large

amplitude Please set trigger level to be higher

than normal signal slightly then press

RUN STOP button for waiting The machine will

trigger automatically and record waveform before
and after trigger during burring. Horizontal
POSITION knob in horizontal

ķ



ĸ

Ĺ



ĺ



Ļ





Operating Manual for UTD2000/3000

7

6

control area on the panel can be rotated to alter
horizontal trigger position so as to gain negative
delay trigger with different length to facilitate
observation of waveform before burring

.

Figure 3-3 Single signal

You can adjust setup of digital storage oscillograph

for overlapping of random noise to tested signal so

as to filter or reduce noise and avoid disturbance to

ontology signal during measurement. (Please refer

to following figure for waveform.

)

Figure 3-4 To reduce random noise of signals
Operation steps are as follows

:

1. As shown in previous example, please set
attenuation coefficient of probe and CH1 channel

.

The fourth example: To reduce random noise of

the si gnal

7

7

2. To connect signals for stable waveform display o

n

digital storage oscillograph

.

Please refer to previous example for operation

.

Please refer to previous chapter for adjustment of
horizontal time base and vertical gear

.

3. To improve trigger by setting trigger coupling

.

(1) To press MENU button in trigger area to displa

y

trigger setup menu

.

(2) To set trigger coupling to low-frequenc

y

inhibition or high-frequency inhibition. Low­frequency inhibition is to set a high-pass filter to
filter low-frequency signal component of less tha

n

80kHz and allow pass through of high-frequenc

y

signal component. High- frequency inhibition is to
set a low-pass filter to filter high-frequency signal
component of more than 80kHz and allow pass
through of low-frequency signal component. It ca

n

be set to inhibit low-frequency or high-frequenc

y

noise respectively to gain stable trigger

4. To reduce display noise by setting samplin

g

modes

.

To adopt average sampling mode to eliminate
display of random noise to thinner waveform and
facilitate observation & measurement if waveform is
thickened by overlapping random noise to
measured signal. Signal details can be observed

convenientl

y by reduced random noise after gainin

g

average value. Detailed operation is as follows
To press ACQUIRE button in panel menu area to
display sampling setup menu To press F1 key as
menu operation key to set obtainment mode to
average status. (As shown in following figure,

)

please adjust average times by pressing F2 key as

menu operation key with step from 2 to 256 b

y

multiples of 2 so that waveform display can meet
observation & test equirements

.

ķ





Operating Manual for UTD2000/3000

7

8

Figure 3-5 Inhibited signal noise

To reduce display noise by reducing wav eform

brightness

.

Note: Average sampling mode can be used to slow
down updating speed for waveform display as
normal phenomenon

.

This digital storage oscillograph can measure 2

8

kinds of waveform parameters automatically. All
automatic measurement parameters can be measured
by cursor. Waveform time and voltage can be
measured quickly by using cursor

.

Please operate according to following steps to
measure 1 staircase voltage of staircase signal

:

1. To press CURSOR key to display cursor
measurement menu

.

2. To press F1 key as menu operation key to set
cursor type to voltage

.

3. To rotate multi-purpose knob controller to place the
first cursor to 1 staircase of staircase signal

.

4. To press SELECT or PUSHSELECT to select the
cursor then rotate multi-purpose knob controller to
place the secondcursor to another staircase of
staircase signal

.

ĸ

The fifth example: Application curso

r

measurement

To measure 1 staircase voltage of staircase signal

Operating Manual for UTD2000/3000

7

9

Ƹ 



V namely pressure difference can be show

n

in cursor menu automaticall

y

Please refer to following figure for details

.

Note: Please set cursor type to time if onlyin

g

adopting the secondstep as above for time
measurement by cursor

.

Figure 3-6 Voltage difference of signal by cursor
measurement

To review phase location difference of signals of

2

channels

.

Example: Phase location variation caused by 1
circuit for tested signals. Please connect digital
storage oscillograph to cir cuit to monitor
input/output signal of circuits. Please operate
according to following steps to review input/output
terminal of circuits by way of X-Y coordinate
diagram

.

1. To set probe menu attenuation coefficient to 10*
and set switch on the probe to 10*

.

2. To connect CH1 probe to network input the

n

connect Ch2 probe to network output

.

3. To press CH1 and CH2 menu keys and open

2

channels if they have not been displayed

.

4. To press AUTO button

.

5. To adjust vertical scale knob for approximate
equivalent display amplitude of 2 loops of signals

.

The sixth example: Application of X-Y function

Operating Man ual for UT D2000/30 00

80

6. To press DISPLAY menu key to call out displa

y

control menu

.

7. To press F2 to select X-Y. Digital storage
oscillograph will display input/output characteristics of
circuit under Lissa Jous's figure mode

.

8. To adjust vertical scale and vertical position knob to
reach the best effect for waveform

.

9. (As shown in following figure), please observe and
calculate phase location difference by elliptic
oscillograph figure method

.

VLQș $% RU &' 2I ZKLFK ³ș ´ UHIHUV WR SKDVH

location difference angle between channels. Please

refer to above figure for definition of A, B, C and D.

Therefore,phase location difference angle is
calculated as follows =±arcsin A B or

±arcsin C D Calculated phase locatio

n

difference angle shall be within Q uadrant I or IV

(namely, (0~ ) or ( ~ ) if main axle of ellipse

is within Quadrant I or III. Calculated value is within

( ~ ) or ( ~ ) if main axle of ellipse is withi

n

Quadrant II or IV. Additionally, frequency and phase
location relationship between 2 signals can be
calculated according to figure if frequency or phase
location difference of 2 measured signals is integral
multiple

.







Operating Manual for UTD2000/3000

Signal must be in the
horizontal center

Figure 3-

7

3

2

2



2



2





3

2

8

1

10.Form of X Y phase location difference The seventh example: Trigger of video signal

Trigger o f video fiel

d

Video trigger function can be used for all modes
except UTD2000L/2000EX series. (Of which

:

UTD2025CL has video trigger function.

)

It has to adopt video trigger to gain stable video
output signal display for observation of a certai

n

video circuit.

Please operate according to following steps for
trigger in video field

.

1. To press[ MENU ]button in trigger control area to

display trigger menu

.

2. To press[ F1] key as menu operation key to select
video type

.

3. To press[ F2] key as menu operation key to set
trigger source to CH1

.

4. To press[ F3] key as menu operation key to select
video standard of P

A

L

.

Operating Manual for UTD2000/3000

Frequenc

y

ratio of
signal

1:1

Phase location difference

0°

4

5

°

9

0

°

18

0

°

27

0

°

36

0

°

Operating Manual for UTD2000/3000

8

2

5. To press [F4] key as menu operation key to select
synchronization of odd field or even field

.

6. To adjust horizontal time base by rotatin

g

horizontal SCALE knob in horizontal control area so
as to gain clear waveform display

.

Figure 3-8 Trigger of video field

Please operate according to following steps for
trigger in video row

:

1. To press [MENU] button in trigger control area to

display trigger area

.

2. To press[ F1] key as menu operation key to select

video.

3. To press [F2] key as menu operation key to set
trigger source to Ch1

.

4. To press[F3] key as menu operation key to select
video standar

d

of PAL

.

5. To press[ F4] key as menu operation key to select
synchronization to designated row

.

6. To rotate multi-purpose knob controller for trigger
in any row

.

7. To adjust horizontal time base by rotatin

g

horizontal SCALE knob in horizontal control area so
as to gain clear waveform display

.

Trigger o f video row

Operating Manual for UTD2000/3000

8

3

Figure 3-9 Trigger of video row

It has to check if input signal is within rule scope or
not. Fail refers to out of scope and Pass refers to
within the scope. Pass/Fail signal can be shown b

y

output port

.

1. To press[UTILITY] button then press[F2]Enter into

Pass/Fail menu

.

2. Setup of information source: Enter into Pass/Fail
menu then press[F2] to select information source

.

3. Template setup: To press[F4] Enter into template
setup menu (Template). To press[F2] and[F3] show

n

in Template me nu to set horizo ntal and ver tic al
tolerance scope by multi-function knob, (namely, 1­200Pixel toward ho

rizontal direction and 1-100Pixel

toward vertical direction.) Please press F4 finall

y

Return to Pass/Fail menu.

4. Setup of output conditions: To press[F3] to set
output conditions shown in Pass/Fail menu

.

5. To begin detection: To press[F1] to ope

n

detection status shown in Pass/Fail menu

.

The eighth example: Pass/Fail detection

of the rear panel

Rear panel of Pass / Fail output

Pass FailInterface Schematic

Operating Man ual for UT D2000/30 00

84

The ninth example: Usage o f updatin

g

procedure of U-disk

Updating procedure of U-disk can be used more
conveniently and flexibly. Please operate according to
following step s if using this fun cti on

:

1. To download procedure documents to update from
Internet then save them in U-disk. (It is suggested to
use U-disk suggested by us.

)

2. To close oscillograph and insert U-disk then ope

n

oscillogr aph

.

3. To turn to confirmation interface of whether to
update it or not if there is only 1 procedure document
in U-disk. Please press[F5] for exit or press F1 to e xit
procedure updating. Document selection interace will
appear if there are at least 2 procedure documents i

n

U-disk. Please press[F5] key for confirmation (or
press[F1] to exit procedure updating). Please turn to
confirmation interface of whether to update it or not

then press[F5] for updating)

.

4. To wait for updating for prompt of successful
updating. Please power off oscillograph then open it to
fulfill updating pr oce dure

.

Note:

1. Please wait for updating for several minutes

.

2. It is not allowed to power off oscillograph or plug

out U-disk during updating to avoid updating failure
or unforeseenable error

.

3. Please power off oscillograph then open it for re­updating after updating failure

.

Operating Manual for UTD2000/3000

8

5

The tenth example: Usage of storage function

1. Setup of storage function:

Storage functions of oscillograph include setup
storage, waveform storage, bitmap storage and
specific screen copy function of UTD2000L/2000EX
series of oscillograph

.

It has to select display channel, trigger channel

,

vertical and horizontal gears of oscillograph for
setup. Please press[STORAGE] key to sel ect
torage type of “setup” by pressing[F1 ]key. As
shown in following figure, it has to select position to
save by multi-function button then press F3 for
saving

.

It can be tested directly during next test after saving

setup to reduce re-setup process. UTD2000C series

of oscillograph can save 10 kinds of setup while
UTD2000E and UTD2000L/2000EX series of
oscillograph can save 20 kinds of setup

.

Figure 3-10 Saving setup interface

Operating Manual for UTD2000/3000

8

6

2. Waveform storage function:

UTD2000 series of oscillograph can provide waveform
storage function. User can press[STORAGE]key and
[F1] key to select storage type of “waveform”. User ca

n

press [F2]key to select channel to save waveform the

n

press[F5]Ente r in to ne x t page . M ag ne ti c dis k in F1
menu position can designate storage position and
default storage position is digital storage oscillograp

h

(DSO) without plugging in U-disk. Stored magnetic disk
position can be [DSO] or [USB] after plugging in U-disk

.

Default storage depth shown by F2 is ordinary and
saved waveform only can be displayed by oscill ograph

.

Storage depth can be selected to long storage to save
“.data” for exporta ti on by wa v ef orm ana l ysi s s oft wa r e
when plugging in U-disk and selecting magnetic disk
position to [USB]. It is allowed to analyze content data
of every point of saved waveform. User can also press
F5 Return to previous me nu th en select storage
position by multi-fun c ti on bu tto n the n pre ss [F3] fo r

saving

.

Figure 3-12 Waveform storage by U-disk

Figure 3-11 Waveform storage

Operating Manual for UTD2000/3000

8

7

A

s shown in following figure, saved waveform ca

n

be recalled by short-cut key of [REF] on the panel
for UTD2000C and UTD2000E series of
oscillograph. User can press [F3] shown in the
second page of STORAGE main menu for recall for
UTD2000L/2000EX series of oscillograph

.

Figure 3-13 Vertical control panel of 5.7-inch scree

n

A

s shown in following figure, user can press[ F1]
menu key of STORAGE main menu to select storage
type of “bitmap” after plugging in U-disk and
successful connection of osc illograph. User ca

n

rotate multi-function knob to select saved bitmap
No. Saved bitmap in U-disk with “.BMP” format ca

n

be read out by computer directly

.

Figure 3-14 Bitmap storage

3. Bitmap storage function:

Operating Man ual for UT D2000/30 00

8

8

4. Pr tSc copy & storage function

Introduction to S ystem Prompt

There is 1 PrtSc key in upper left corner of the scree

n

for U TD2000L/2000EX series of oscillograph. User
can press the key for screen copy after plugging in U­disk. Displayed image can be saved in U-disk by wa

y

of “.BMP” format

.

Figure 3-15 Screen cop

y

Regulation to the extreme: It prompts that multi­purpose knob has been regulated to the greatest
extent under current status and continued adjustment
is not allowed. The prompt will display whe

n

regulating vertical deflection coefficient switch, time
base switch, X displacement, vertical displacement
and trigger level to the terminal

.

Successful connection of U-disk : The prompt will
display on the screen after connecting U-disk to
digital storage oscillograph and correct connection

.

Plug-out of U-disk: The prompt will display on the
screen when plugging out U-disk from digital
storage oscillograph.Saving: The prompt will
display on the screen with schedule bar below it
when saving waveform

Chapter 4: System Prompt and
Troubleshootin

g