UNI-T UTD4000 Series, UTD4204C, UTD4104C, UTD4304C User Manual
Safety Instructions
This unit is designed and manufactured strictly in
accordance with GB4793 safety requirements for
electronic testing meters and IEC61010-1 safety
standards. It fully meets CAT II 600V insulation and
overvoltage requirements and Grade II anti-pollution
safety standards. To prevent personal injuries and
damage of this unit or any other devices connected to
it please take note of the following safety precautions
To avoid potential hazards use this unit strictly as
instructed by this User Manual
Use only the specified
power cable which is authorized in the country of use.
Do not remove the
probe
or testing cable when they are connected to power.
This unit is grounded by
the ground wire of the power cable. To avoid electric
shock, the grounding conductor must touch the
ground. Before connecting the input or output
terminal, ensure the unit is properly grounded.
The probe ground cable is the same
as ground potential. Do not connect the ground cable
to non ground voltage or high voltage.
To prevent
fire and excessive current shock please check all
rated values and label data Read the manual
carefully and check the rated values before
connecting the unit
Do not operate this unit when t
he outer cover
or front panel is open.
Only use specified fuse types
and rated specifications.
When power is on, never
make contact with exposed adaptor or components.
, .
,.,::::,..:::
Maintenance should only be carried out by a
trained professional.
To avoid fire and personal injury
Use a correct power cable
Remove the plug correctly
Ensure good grounding :
Connect the probe of the digital storage
oscilloscope
Check the rated values of all terminals
Do not operate the unit with the chassis cover
open
Use suitable fuses
Avoid exposing circuitry
UTD4000 Four-channel
User Manual
When fault is suspected, stop operation
Maintain good ventilation.
Do not operate in humid condition.
Do not operate in combustible and explosive
conditions.
Keep the product surface clean and dry.
Messages on the product
Danger
Warning
Caution
Icons on the product
:
If you
suspect a fault, ask a qualified maintenance
professional to carry out inspection.
Safety terminology used in this manual. The following
messages may appear in this manual
The following
messages may appear on the product
means potential damage that is
immediate
means potential damage that is not
immediate
means possible damage to this product
or other properties
The following icons may
appear on the product
Safety Messages and Symbols
:::
" "
.
" "
.
" "
.::
Warning
:
.
Warning statements identify conditions
or practices that could result in injury or loss of life
Caution
:
Caution statements identify conditions
or practices that could result in damage to this unit
or other properties
UTD4000 Four-channel
User Manual
Protective
ground terminal
Ground terminal
for chassis
Ground terminal
for testing
Caution!
Refer to manual
High voltage
Preface
This manual provides information on the operation of the
UTD4000 four-channel digital storage oscilloscope series.
Guidance is given in several chapters as follows :
Simple guide to oscilloscope
functions and installation
Guide to operation of
the UTD4000 four channel digital storage oscilloscope
series.
Example
illustrations are provided to solve various testing
problems
Chapter 1 User Guide
Chapter 2 Instrument Setups
Chapter 3 Practical Illustrations
Chapter 4 System Prompts and Trouble shooting
Chapter 5 Servicing and Support
Chapter 6 Appendixes
Appendix A : Technical Indicators
Appendix B : Accessories for UTD4000 Four-channel
Digital Storage Oscilloscopes
Appendix C : Maintenance and Cleaning
Appendix D : Factory Setup
:.:-:.-
UTD4000 Four-channel
User Manual
The UTD4000 Four-channel Digital Storage Oscilloscope Series
UTD4000 four-channel digital storage oscilloscopes offer user-friendliness, outstanding technical indicators
and a host of advanced features. They are your perfect tools to complete testing tasks swiftly and efficiently.
This manual is a user guide for 3 models of this digital storage oscilloscope series :
UTD4000 Four-channel
User Manual
Model
Bandwidth
Single-channel Sampling
Rate
Dual-channel Sampling
Rate
Equivalent Sampling
Rate
UTD4104C
UTD4204C
100MHz
200MHz
2GS/s
2GS/s
UTD4304C
300MHz
2GS/s
1GS/s
1GS/s
1GS/s
50GS/s
50GS/s
UTD4000 four-channel digital storage oscilloscopes
offer a user-friendly front panel with clear indications
to allow access to all basic functions for easy
operation. The scaling and position buttons for all
channels are optimally arranged for intuitive
operation As design is based on the familiar
practices of traditional instruments users can use
the new units without spending considerable time
in learning and familiarizing with operation For
faster adjustment to ease testing, there is an [ ]
key to instantly display the appropriate waveform and
range position.
The performance fe
atures listed below will explain
why the UTD4000 series can fully
satisfy your testing and measurement requirements
2GS/s real-time sampling rate and 50GS/s
equivalent sampling rate
Dual time base function unrivaled waveform
detail observation and analysis capabilities
24k storage depth; 60M equivalent storage
depth; 1024k recording length
Unique envelop sampling feature with direct
visual display of carrier wave details after
amplitude modulation
Scroll display in scan mode for continuous
monitoring of signal variations
Unique XY mode that displays the waveform and
Lissajou
s figure concurrently
USB drive system software upgrade
Supports plug-and-play USB storage device.
Communication with computer through the USB
device
Storage of waveforms setups and bit maps
waveforms and setups reproduction
Built-in FFT
Multiple waveform mathematics functions
(including add, subtract, multiply and divide)
.,.:;
, ;
AUTO
Four-channel
●
●●●●●●●●●
●
UTD4000 Four-channel
User Manual
UTD4000 Four-channel
User Manual
●●●●●●●●●
●
Edge, video, pulse, slope and alternate trigger
functions
Automatic measurement of 24 waveform parameters
parameters testing and customization
Multiple setups for extra flexibility
Visual system help messages
4 x 1.2m, 1:1/10:1 probe. For details refer to the
probe instructions. These accessories conform
with EN61010-031: 2008 standards
Power line conforming to international standards
applicable in the country of use
User Manual
USB connecting cable : UT-D06
UTD4000 four-channel oscilloscope
communication control software (USB-device)
2x multimeter test lead; 2x c -to-vol
tage
converter module: UT M03/UT-M04
;
-
AUTO
UTD4000 Four-channel accessories :
urrent
TableofContents
Item Page
SafetyInstructions
Preface
Chapter1
FunctionalCheck
ProbeCompensation
AutomaticSetupforWaveformDisplay
GettingtoKnow the VerticalSystem
GettingtoKnow the HorizontalSystem
GettingtoKnow theTriggerSystem
Chapter2 InstrumentSetups
SettingtheVerticalSystem
SettingtheHorizontalSystem
SettingtheTriggerSystem
-
Setting the Display System
UserGuide------------------------------------------------------------------------------
GeneralInspection----------------------------------------------------------------------
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Setting the Sampling System
Storage and Recall
166101111131517183540525659
UTD4000 Four-channel
User Manual
Item Page
Automatic Measurement
UsingtheRun/Stop
Auto Setup
Help System
Chapter3 PracticalExampleIllustrations
Illustration 1 : Measuring simple signals
Illustration 2 : Observing the delay caused by a
sine wave signal passes through the circuit
Illustration 3 : Acquiring single signals
Illustration 4 : Reducing random noise of signals
Illustration 5 : Using the cursors for measurement
Illustration 6 : Using the X-Y function
Illustration 7 :
Illustration 8 :
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-----------------------------------
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---------------------------------------------
---------------------------------
-------------------------------
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------------------------------
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Utility Function Setup
Cursor Measurement
Multimeter Measurement
Vedio signal triggering
Using the dual time base function
Illustration 9 : Using the multimeter
64
707476777878808081838486909294
95
UTD4000 Four-channel
User Manual
I
tem Page
Chapter 4 System Prompts and Trouble-shooting -------------------------------------------
Definitions of System Prompts -----------------------------------------------------
Troubleshooting-----------------------------------------------------------------------
Chapter 5 ----------------------------------------------
Chapter 6 Technical Indicators ------------------------------------------------------------------
Appendix A : Technical indicators--------------------------------------------------
Appendix B :
----------------
--------------------------------------------------
Appendix C : Maintenance and Cleaning-----------------------------------------
Appendix D -------------------------------------------------------
:
Upgrading System Software on USB
Accessories for UTD4000 Four-channel Digital Storage
Oscilloscope Series
Factory Setups
96969698106
106
115
116
117
UTD4000 Four-channel
User Manual
Chapter 1 UserGuide
Your UTD4000 Four-channel digital storage
oscilloscope is a small and compact benchtop device.
The user-friendly front panel enables easy operation.
This chapter will guide you through basic testing
steps.
This chapter provides notes on the following :
General inspection
Functional check
Probe compensation
Automatic setups for waveform display
Getting to know the vertical system
Getting to know the horizontal system
Getting to know the trigger system
When beginning to use your UTD4000 Four-channel
oscilloscope, first familiarize yourself with the
operation front panel. This ch
apter briefly describes
the operation and functions of the front panel, so you
can get started with your UTD4000 four-channel
digital storage oscilloscope as quickly as possible.
Your UTD4000 Four-channel oscilloscope comes with
a front panel with at-a-glance functions for easy
operation There are knobs and function keys on
the front panel The functions of knobs are similar
to other oscilloscopes On the right you will find 5
menu operation keys designated as to
from top down With these keys you can set up
different options of the current menu. The other keys
are function keys. You can use the
m to enter different
function menus or access particular functions directly.
●●●●●●●
...
( [ ] [ ]
).
F1 F5
1
UTD4000 Four-channel
User Manual
Figure1-1 Series Digital Storage Oscilloscope
UTD4000 Four-channel
2
UTD4000 Four-channel
User Manual
3
UTD4000 Four-channel
User Manual
Figure 1-2 Back cover of UTD4000 four-channel digital storage oscilloscope
USB device communication
interface
External trigger
channel
PROBE
COMPVMHz≈31All Inputs
400Vp Max
CAT II
1M 1 6pF
Ω
≈
TRIG GER
HOR IZONTAL
SCALE
MENU
HELP
REF
MATH
F1F2F3F4F5
MENU
ON/OF F
CLOSE
DMM
MEASURE
CURS OR
ACQ UIRE
DISP LAY
STOR AGE
RUN/STOP
UTIL ITY
AUTO
MENU
VERT ICAL
SCALE
SCALE
SCALE
SCALE
SEC/ DIV
UTD4304C
300MHz 2GS/s
DIGITA LSTO RAGE OSCILLO SCOPE
POSI TION
POSI TION
POSITION
POSI TION
POSI TION
UTD4000 Four-channel
User Manual
Figure1-3 Series Digital Storage Oscilloscopes
Front Panel
UTD4000 Four-channel
4
Trigger controls
Horizontalcontrols
Frequently
UsedMenus
Multifunction
knob
Verticalcontrols
Probecompensation
signaloutput
Analogsignal input
USBHost
interface
M
ultim
eterinput
Powerswitch
5
UTD4000 Four-channel
User Manual
Figure1-4 Schematic diagram ofthedisplayinterface
Trigger status display
Displayingthehorizontal triggerposition
Trigger frequency counter
Channel vertical
attenuation range
Trigger level
Waveform
displaywindow
Themenuvaries with
individualfunctionkeys
Channel vertical
reference
Displaying main
time base setup
6
UTD4000 Four-channel
User Manual
General Inspection
Functional Check
We suggest checking your new UTD4000 Four-
channel oscilloscope in the following steps.
If the package carton or foam plastic protective lining
is seriously damaged, please arrange for exchange
immediately.
A checklist of accessories that come with your
UTD4000 Four-channel oscilloscope is provided in
the section Accessories for UTD4000 Four-channel
Digital Storage Oscilloscopes of this user manual
Please check any missing items against this list
If any item is missing or damaged please contact
your NI-T dealer or our local office.
If the exterior of the unit is damaged, or it is not
op
erating normally, or it fails to pass the performance
test, please contact your UNI-T dealer or our local
office.
In the event of any shipping damages, please retain
the packaging and notify our shipping department or
your UNI-T dealer. We will be glad to arrange
maintenance or repair.
Carry out a quick functional check in the following
steps to make sure your oscilloscope is operating
normally.
1. Check the unit for possible shipping damages
2. Check the accessories
3. Thorough inspection of the entire unit
“
” .
.,U
1. Power on the unit
UTILITY
F1
UTILITY F1 F5
F1
CH1
Power on the unit. AC power supply voltage range is
100V to 240V, frequency 45Hz-440Hz. After
connecting to power, start the self calibration process
on the optimal oscilloscope signal path at greatest
measurement accuracy. Press the [ ] button
and [ ] twice, then press the
control knob to perform the function Press
[ ] and [ ], then press [ ] to go to the next
page. There, press [ ] then the
control knob To recall default setup, see
Figure 1-5.
At the end of the above process, press [ ] to enter
the CH1 menu..
MULTIPURPOSE
MULTIPURPOSE
.
.
Utility key
Power switch
Figure1-5
Warning
:
To avoid danger, ensure the digital
storage oscilloscope is safely grounded.
7
UTD4000 Four-channel
User Manual
2. Accessing signals
Your UTD4000 Four-channel digital storage
oscilloscope has four input channels and an external
trigger input channel, as shown in Figure 1-6. Please
access signals in the following steps :
Connect the probe of the digital storage
oscilloscope to the CH input terminal and set
the attenuation switch of the probe to X
Figure
①
,
( - ) .
1101 7
Figure1-6
Four-channel input and external
trigger channel
8
EXT external trigger channel
–
Figure 1-7 Setting the attenuation switch of
the oscilloscope probe
UTD4000 Four-channel
User Manual
②
.
: [ ] [ ]
.
You have to set the probe attenuation factor of
the oscilloscope. This factor changes the vertical
range multiple to ensure the measurement result
correctly reflects the amplitude of the signal being
tested Set the attenuation factor of the probe as
follows Press then to show X on
the menu
F F
4 2
AUTO
CH1 CH2
10
Connect the probe tip and ground clamp to the
connection terminal for the probe compensation
signal. Press [ ] and you will see a square wave
in the display (1kHz, approximately 3V, peak-to-peak
value) in a few seconds, as shown in Figure 1-
Press [ ] twice to close CH1, then press [ ]
to activate CH2 and repeat steps 2 and 3. Use the
same method for CH3 and CH4.
③
④
.
9
Figure1-8 Settingthedeflectionfactor
ofthe oscilloscope probe
Figure1-9 Probecompensationsignal
Proberation
9
UTD4000 Four-channel
User Manual
ProbeCompensation
When connectingthe probeto any input channel for thefirst
time, perform this adjustment to match the probe to the
channel. Skipping the compensation calibration step will
result in measurement error or fault. Please adjust probe
compensationasfollows:
1 Setthe probeattenuationfactorto10X.Movethe switch
on the probe to 10X and connect the probe to CH1.
When using a hook-tip, ensure it is well connected to
the probe. Connect the probe tip to the output terminal
of the probe compensator s signal connector, and the
ground clamp to the ground cable connector of the
probecompensator.Acti
vateCH1then press [ ].
3. Ifyouseean Undercompensation or
Overcompensation waveform display adjust the
adjustable capacitance tab of the probe with a
screwdriver with non metal handle until a Correct
Compensation waveform shown in the above figure is
displayed
.
AUTO
'
“ ”
“ ” ,
- , “
”
.
2. Observe the displayed waveform.
Overcompensation
CorrectCompensation
Undercompensation
Figure1-10 Probecompensationcalibration
Warning :
, '
To avoid electric shock when measuring high
voltage with the probe ensure the probe s
insulation lead is in good condition. Do not
touch the metal part of the probe when
connectedtoHV power.
10
UTD4000 Four-channel
User Manual
Automatic Setup for Waveform Display Getting to Know the Vertical System
Your UTD4000 Four-channel digital storage
oscilloscope features an auto setup function. It can
automatically adjust the vertical graticule factor,
scanning time base and trigger mode based on the
input signal, until the most appropriate waveform is
displayed. The auto setup function can only be
operated when the signal to be measured is 50Hz or
above and the duty ratio is larger than 1%.
1. Connect the signal to be tested to the signal input
channel.
2. P r es s [ ]. Th e o s ci l l os c o p e w i l l
automatically set the vertical graticule factor
scanning time base and trigger mode Should
you require to m
ake more detailed check you
can adjust manually after the auto setup
process until you get the optimal waveform
display
As shown in the figure below, there are a group of
buttons and knobs in the vertical control zone. The
following exercise will guide you through vertical
setup.
,.,
.
Using the Auto Setup Function :
A U T O
Figure1-11
Vertical control zone on the front panel
11
UTD4000 Four-channel
User Manual
The knob can move the waveform
vertically. Press this knob to quickly return to the
centre point
Press the [ ], [ ], [ ], [ ], [ ] and
[ ] keys for the vertical channel operation menu,
or to open or close the waveform display channel.
Use the [ ](CH1, CH2, CH3, CH4) key to
set the vertical graticule factor.
Displacemen t and v er tical gr aticule facto r
adjustments of [ ], [ ] channels by
control knob
1. Press the vertical knob to display
the waveform signal in the centre of the window.
The vertical knob controls the
vertical display position of the signal When
you turn the vertical knob the
reference sign ind
icating the channel
level will move up and down with
the waveform
POSITION
MULTIPURPOSE
POSITION
POSITION
POSITION
...,[ ]
.
CH1 CH2 CH3 CH4 REF
MATH
VOLTS/DIV
REF MATH
GROUND
2. Change the vertical setup and observe changes
of status information. You can identify changes of
any vertical range by reading the status display
column at the lower corner of the waveform
window. Turn the vertical knob to
change the vertical range You will
find that the range in the current status
column has changed accordingly Press
or
and the screen will show the corresponding
operation menu, sign, waveform and range status
information.
/ .
. [ ],
[ ], [ ] , [ ] , [ ] [ ]
VOLTS/DIV
VOLT DIV
CH1
CH2 CH3 CH4 REF MATH
12
UTD4000 Four-channel
User Manual
Measurement Tips :
If the channel coupling is DC, you can measure the
signal s DC component quickly by checking the
distance between the waveform and signal
ground level
In the case of AC coupling, the DC of the
signal will be blocked. With this coupling mode you
can display the AC of the signal with
higher sensitivity
'..
component
component
Getting to Know the System
Horizontal
As shown in the figure below, there are one button
and two knobs in the horizontal control zone. The
following steps will get you familiar with horizontal
time base setup.
The knob can move all channels MATH
waveforms and REF waveforms horizontally Press
this knob to quickly return to the centre point
[ ] horizontal menu, to display al
.
Use the knob to set the SEC DIV
graticule factor for horizontal scan If the window
is expanded you can adjust graticule of the
window there
1. Use the horizontal knob to change the
horizontal time base setup and check any
changes in status information. Turn the
horiz
ontal knob to change the
time base range You will find that
the time base range in the current status
column has changed accordingly Range of
horizontal scanning rate is 5ns/div~50s/div
(UTD4104C), in steps of 1-2-5
POSITION
SEC/DIV
SEC/DIV
SEC/DIV
,..
/.,./ .
..* :
.
MENU Window Du
Xbase Holdoff
SEC DIV
Note Horizontal scanning time base
range of the
Series varies from model to model
UTD4000 Four-channel
Figure1-12
Horizontal control zone on the front panel
13
UTD4000 Four-channel
User Manual
2. Use the horizontal knob to adjust
the horizontal position of the waveform
window. When the horizontal knob is
turned you can see that the waveform moves
horizontally with the knob
3. Press [ ] to activate the display window and
dual time base menu. In this menu press [ ] to
activate window expansion Then press
again to quit window expansion and return to
the main display screen For dual time base
setup press You can also set the
holdoff time with this menu by turning the
control knob
,.. [ ]
.
, [ ].
.
POSITION
POSITION
MULTIPURPOSE
MENU
F1FF13
UTD4000 Four-channel
User Manual
14
Shortcut key for resetting the trigger point to
horizontal zero :
When the trigger point has shifted significantly away
from the horizontal centre point, use the [POSITION]
knob to quickly reset the trigger point to the
horizontal centre point. You can also use the
horizontal knob for adjustments
POSITION
.
Definition
Trigger point
Holdoff
means the actual trigger point relative
to the centre point of the storage device. By turning
the horizontal knob you can move the
trigger point horizontally
means time before another
trigger to be accepted. Turn the
control knob to set the holdoff time By adjusting
holdoff time you can observe complex or
complicated signals
POSITION
MULTIPURPOSE
,..,.
the interval
Getting to Know the Trigger System
As shown in Figure there are one knob and
one button in the trigger menu control zone. The
following steps will get you familiar with trigger setup.
Trigger knob
When operating edge, pulse width and slew rate
triggers, set the amplitude to be crossed by the
waveform upon signal occurrence by turning the
trigger knob To quickly set the trigger
level as the vertical centre point of the trigger
signal press the trigger knob
To display trigger menu contents
1. Use the trigger knob to change the
trigger level You will see a trigger sign on the
screen that indicates the trigger level The sign
will move up a
nd down with the knob While you
move the trigger level you will find the trigger
level value on the screen changing accordingly.
2. Open the trigger [ ] key (see the figure 1 )
to change trigger setup.
Press [ ] twice and select for
- ,
:., .
[ ]
...,[ ].
1 13
LEVEL
LEVEL
LEVEL
LEVEL
MENU
MENU
F1 EDGE TYPE
-14
15
UTD4000 Four-channel
User Manual
Figure1-13
Trigger menu on
the front panel
Figure1-14
Trigger Menu
Press [ ] and select for [
] (Turn the control
knob to select and then press that key to
confirm).
Press [ ] then [ ]. Set for
Press [ ] then [ ]. Set for [ ].
Press [ ] then [ ]. Set for [ ].
F2 CH1 SIGNAL
SOURCE
F3 F1 DC COUPLING
F4 F1 AUTO MODE
F5 F2 RISE SLOPE
MULTIPURPOSE
[ ] .
Notes :
UTD4000 Four-channel
User Manual
16
Ic o n uti l i ty fu n c tion o f the
knob. Press this key to
quickly return to the centre point.
POSITION
Icon utility function of the trigger
knob Press this key to
quickly return to horizontal ground
level, i.e. trigger zero level
.
.
LEVEL
Ic o n uti l i ty fu n c tion o f the
knob Press
this key to confirm selection
MULTIPURPOSE
.
.
Chapter 2
Instrument Setups
You should be familiar with basic operation of the
vertical controls, horizontal controls and trigger
system menu of your UTD4000 Series
oscilloscope by now. After reading the last chapter,
you should be able to use the menus to set up your
digital storage oscilloscope. If you are still unfamiliar
with these basic operation steps and methods, please
read Chapter 1.
This chapter will guide you through the following :
Four-channel
●●●●●●●●●●●
●
Settin g up the vertical system ([ ],
[ ],[ ], [ ], [ ], [ ],
Setting up the horizontal system ([ ],
Setting up the Trigger system ( ,
Setting up the sampling method ([ ])
Setting up the display mode
Storage and recall ([ ])
Setting up the help system ([ ])
Automatic measurement ([ ])
Cursor measurement ([ ])
Auto setup, run/stop key ([ ], [ ])
Multimeter ([ ])
Multipurpose control knob (
It is recommended that you read this chapter carefully
to understand the various measurement functions
and system operation steps of your UTD4000 four-
channel digital storage oscilloscope.
CH 1
CH2 CH3 CH4 MATH REF
MENU
ACQUIRE
DISPLAY
STORAGE
UTILITY
MEASURE
CURSOR
AUTO RUN/STOP
DMM
POSITION
VOLTS/DIV
POSITION SEC/DIV
TRIGGER MENU
LEVEL
MULTIPURPOSE
,), )
)
([ ])
)
17
UTD4000 Four-channel
User Manual
Setting the Vertical System
CH1, CH2, CH3, CH4 and setups
CH1 CH2 CH3 CH4
Each channel has its own vertical menu. You should set up each item for each channel individually. Press the
[ ], [ ], [ ] or [ ] function button and the system will display the operation menu for CH1, CH2, CH3
or CH4. For explanatory notes please see Table 2 below
Table 2-1 Explanatory notes for channel menu
- :
1
：
UTD4000 Four-channel
User Manual
18
Function Menu
Setup
Explanatory Note
Coupling
DC 1M
AC 1M
GND
Ω
Ω
Pass AC and DC quantities of input signal. Intercept DC quantities of
the input signal.
Display reference ground level (without disconnecting the input signal).
BW Limit
Full
20MHz
Full band width.
Limit bandwidth to 20MHz to reduce noise display
VOLTS/DIV
Coarse
Fine
Coarse tune in steps of 1-2-5 to set up the vertical graticulefactor of
the vertical system Fine tune means further tuning within the coarse
tune setup range to raise the vertical resolution
.
.
Probe
1X
10X
100X
1000X
Select either one value based on the probe attenuation factor to keep
the vertical deflection factor reading correct. There are four values :
1X, 10X, 100X and 1000X.
Invert
On
Off
Waveform is inverted
Normal waveform display.
.
1. Setting up channel coupling :
F1 F2
Take an example of applying a signal to CH1. The
signal being tested is a sine signal that contains
DC%. Press [ ] to select AC then press [ ] to select
AC 1M It is now set up as AC coupling DC
quantities of the signal being tested will be
intercepted The waveform display is as follows
. .
. :
Ω
Ω
Press [ ] twice to select DC 1M Both DC and AC
quantities of the testing signal being inputted to
CH1 can pass through The waveform display is
as follows
F1
..:
19
UTD4000 Four-channel
User Manual
Figure 2-1 DC quantities of the signal are intercepted
AC coupling
setup
DC coupling
setup
Figure 2-2 Both DC and AC quantities of the signal are
displayed
UTD4000 Four-channel
User Manual
20
Press [ ] then [ ] to select ground. It is now set up
as ground. The waveform display is as follows :
F1 F3
* : ,
,..
Note In this mode although waveform is
not displayed the signal remains connected to
the channel circuit
2. Setting the channel bandwidth limit
CH1 F2
Take applying a signal to Ch1 as an example, the
signal to be tested contains high frequency
quantities.
Press [ ] to turn CH1 on, then press [ ] and [F1].
Bandwidth is now set to full bandwidth The signal
being measured can pass through even if it
contains high frequency quantities. The waveform
display is as follows :
Figure 2-3 Channel is set to ground mode
Ground coupling
setup
Figure 2-4 Waveform display at full
bandwidthdisplayed
Full
bandwidth
Press [ ] then [ ]. The noise and high frequency
quantities over 20MHz of the signal being tested are
now restricted. Waveform display is as follows.
F2 F3
3. Setting up the probe rate
To match the probe attenuation factor setup, it is
necessary to set up the probe attenuation factor in
the channel operation menu accordingly For
example when the probe attenuation factor is
10:1 set the probe attenuation factor at 10X in
the channel menu Apply this principle to other
values to ensure the voltage reading is correct
The figure below shows the setup and vertical
range display when the probe is set at 10:1.
.,,..
21
UTD4000 Four-channel
User Manual
Figure 2-5 Waveform display when bandwidth
limit is on
Bandwidth
limit 20MHz
The BW bandwidth
limit icon
“ ”
Figure 2-6 Setting the probe attenuation factor in the
channel menu
Probe attenuation
factor
Vertical range
movement
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