UTD4000 ENGLISH USER MANUAL

UTD4000 Operating Manual
General Safety Rules
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 Operating Manual.
Maintenance should only be carried out by a
trained professional.
To avoid fire and personal injury :
Use a correct power cable : Use only the specified
power cable which is authorized in the country of use.
Remove the plug correctly : Do not remove the
probe or testing cable when they are connected to
power.
Ensure good grounding : 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.
Connect the probe of the digital storage oscilloscope : The probe ground cable is the same as ground
potential. Do not connect the ground cable to high
voltage.
Check the rated values of all terminals : 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.
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UTD4000 Operating Manual
Do not operate the unit with the chassis cover
open : Do not operate this unit when the outer cover or
front panel is open.
Use suitable fuses : Only use specified fuse types
and rated specifications.
Avoid exposing circuitry : When power is on, never
make contact with exposed adaptor or components.
When fault is suspected, stop operation : If you
suspect a fault, ask a qualified maintenance professional to carry out inspection.
Maintain good ventilation.
Do not operate in humid condition.
Do not operate in combustible and explosive
conditions.
Keep the product surface clean and dry.
2
Safety Messages and Symbols
Safety terminology used in this manual. The following
messages may appear in this manual :
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.
Messages on the product : The following messages
may appear on the product :
“Danger” means potential damage that is immediate.
“Danger” means potential damage that is immediate.
“Warning” means potential damage that is not immediate.
“Caution” means possible damage to this product or
other properties.
UTD4000 Operating Manual
Symbols on the product : The following symbols may
appear on the product :
High voltage
Caution! Refer to manual
Protective
Ground terminal
ground terminal
for chassis
Ground terminal
for testing
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Instrument Setups : Guide
to operation of the UTD4000
digital storage oscilloscope
series.
Practical Illustrations :
Example illustrations are pro
vided to solve various testing
problems.
System Prompts and
Trouble-shooting :
Servicing and Support :
Appendixes :
Preface
This manual provides information on the operation of
the UTD4000 digital storage oscilloscope series. Guidance is given in several chapters as follows :
Chapter 1
User Guide : Simple guide to
oscilloscope functions and
installation.
Appendix A : Technical Indicators
Appendix B: Accessories for UTD4000
Oscilloscopes
Appendix C : Maintenance and Cleaning
3
UTD4000 Operating Manual
UTD4000 Introduction
UTD4000 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 7 models of this
digital storage oscilloscope series :
Model
UTD4042C
UTD4062C
UTD4082C
UTD4102C
UTD4152C
UTD4202C
UTD4302C
4
Bandwidth Single Channel
Sampling Rate
40MHz
2GS/s
60MHz
2GS/s
80MHz
2GS/s
100MHz
2GS/s
150MHz
2GS/s
200MHz
2GS/s
2GS/s
300MHz
Equivalent
Dual Channel
Sampling Rate Sampling Rate
1GS/s
1GS/s
1GS/s
1GS/s
1GS/s
50GS/s
1GS/s
50GS/s
1GS/s
50GS/s
UTD4000 Operating Manual
UTD4000 oscilloscopes offer a user-friendly front panel with clear indications to allows access to all basic
functions for easy operation. The scaling and position
buttons for all channels are optimally arranged for
direct view operation. As design is based on the
controls 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 [AUTO]
key to instantly display the appropriate waveform and
range position.)
The performance features listed below will explain why
UTD4000 series can fully satisfy your testing and
measurement requirements :
2GS/s real-time sampling rate (dual channel
1GS/s, single channel 2GS/sand 50GS/s equivalent
sampling rate (UTD4152C/UTD4202C/UTD4302C)
Dual time base function; unrivaled waveform
detail observation and analysis capabilities
24k storage depth; 60M equivalent storage
depth; 1024k recording length
16-channel logic analyzer; 3½ digital multimeter
Unique envelop sampling feature with direct
visual display of carrier wave details after amplitude
modulation
Quick waveform acquisition and colour
change function that visually describes the strength of
waveform
Scroll display in scan mode for continuous
monitoring of signal variations
HD colour LCD system at 320 x 240 pixel aspect ratio
Unique XY mode that displays the waveform
and Lissajous figure
USB drive system software upgrade
Supports plug-and-play USB storage devices
and capable of communicating with a computer
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UTD4000 Operating Manual
through the USB storage device
Automatic waveform and status configuration
Storage of waveforms, setup and bit map;
waveforms and setups reproduction
Automatic measurement of 27 waveform
parameters; parameters testing and customization
Automatic cursor tracing measurement
Unique wave recording and replay function
Built-in FFT
Multiple waveform mathematics functions
(including add, subtract, multiply and divide)
Edge, video, pulse width, slew rate and alternate trigger functions
Visual system help messages
6
UTD4000 accessories :
2 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
Operating Manual
Product Warranty Card
USB connecting cable : UT-D06
UTD4000 communication control software
(USB-DEVICE)
2 x multimeter pen; 2 x current-to-voltage
converter module;UT-M03/UT-M04
UTD4000 logic analyzer probe (including
clamps and cable, flex cable) : UT-U01
UTD4000 Operating Manual
Item
General Safety Rules
Preface
Chapter 1
Chapter 2
Chapter 3
Page
User Guide
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
Instrument Setups
Setting Up the Vertical System
Setting Up the Horizontal System
Setting Up the Trigger System
Setting Up the Sampling System
Setting Up the Display System
Storage and Recall
Setting Up Utility Functions
Automatic Measurement
Cursor Measurement
Using the Run Button
Logic Analyzer (LA) Measurement
Multimeter Measurement
Practical Example Illustrations
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11
13
14
15
16
18
19
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34
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50
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56
60
64
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69
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UTD4000 Operating Manual
IItem
Chapter 4
Chapter 5
Chapter 6
8
Index
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 cursors for measurement
Illustration 6 : Using the X-Y function
Illustration 7 : Video signal triggering
Illustration 8 : Pass/fail check
Illustration 9 : Quick acquisition
Illustration 10: Using the dual time base function
Illustration 11: Using the Logic Anaylzer
Illustration 12: Using the multimeter
System Prompts and Trouble-shooting
Definitions of System Prompts
Troubleshooting
Service and Support
Warranty
Using the USB Upgrade Program
Contact Us
Technical Indicators
Appendix A : Technical indicators
Appendix B : Accessories for UTD4000 Oscilloscopes
Appendix C : Maintenance and Cleaning
Page
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UTD4000 Operating Manual
Chapter 1
User Guide
UTD4000 Series digital storage oscilloscopes are small and compact portable devices. The user-friendly
front panel enables easy operation for basic testing
and measuring tasks.
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
so you can get started with your UTD4000 series digital
storage oscilloscope as quickly as possible.
Your UTD4000 oscilloscope comes with a front panel
with at-a-glance functions for easy operation. There
are buttons and function keys on the front panel. The
functions of knobs are similar to other oscilloscopes.
The row of 5 keys on the right of the display panel are
menu operation keys (designated as [F1] to [F5] 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 them to enter different function
menus or access particular functions directly.
When beginning to use your UTD4000 oscilloscope, first
familiarize yourself with the operation front panel. This
chapter briefly describes the operation and functions of
the front panel,
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UTD4000 Operating Manual
Trigger
status display
Horizontal
trigger position
Frequency of the
triggered signal
The menu may
vary with
individual
function keys
Channel 1
vertical
reference
Waveform
display
window
Figure 1-1 Front panel of UTD4000 Oscilloscopes
Multifunction
control knob
Frequently
used menus
Operation
control
Trigger control
Horizontal control
Vertical control
probe compensation
signal input
Power USB Host Multimenter Signal external
input trigger input
switch interface input port
10
Figure 1-2 Schematic diagram for
operating the UTD4000 front panel
Main time
base setup
Display channel
vertical range
Trigger level value
Figure 1-3 Schematic diagram
for the display interface
UTD4000 Operating Manual
General Inspection
Functional Check
We suggest checking your new UTD4000 oscilloscope
in the following steps.
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
If the package carton or foam plastic protective lining is
seriously damaged, do not discard until you have
carried out an electrical and mechanical check and
found the product and accessories performing satisfactorily.
2. Check the accessories
A checklist of accessories that come with your UTD4000
oscilloscope is provided in the section “UTD4000 Accessories” of this operating manual. Please check for any
missing items against this list.
If any item is missing or damaged, please contact your
UNI-T dealer or our local office.
1. Power on the unit
Power on the unit. Power supply voltage is 100-240V
AC, 45-440Hz. After connecting to power, start the self
calibration process by pressing the [UTILITY] button
(utility function) once and [F1] twice. Then press
[SELECT] to run.
To go to the next page press [UTILITY], [F1], THEN
[F5]. To run the factory default setup, press[F1] then
[SELECT], as shown in Figure 1-4.
When the above procedure is complete, press [CH1] to
enter the CH1 menu.
3. Thorough inspection of the entire unit
If the exterior of the unit is damaged, or it is not operating normally, or it fails to pass the performance test,
please contact your UNI-T dealer or our local office.
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UTD4000 Operating Manual
UTILITY button
Power ON/OFF button
Figure 1-4
Warning : To avoid danger, ensure the digital
storage oscilloscope is safely grounded.
2. Accessing signals
Your UTD4000 oscilloscope has dual input channels and
one external trigger input channel. Please access
signals in the following steps :
(1) Connect the probe of the digital storage oscilloscope to the CH1 input, and set the attenuation switch
of the probe to 10X (Figure 1-5).
12
Figure 1-5 Setting the attenuation switch
(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
[F4] then [F2] to display 10X on the menu.
UTD4000 Operating Manual
function button to close CH1, then press [CH2] function
button to open CH2. Repeat steps 2 and 3.
Probe ration
Figure 1-6
Setting the probe
deflection factor of the oscilloscope
(3) Connect the probe tip and ground clamp to the
corresponding probe compensation signal terminals.
Press [AUTO] and you will see a square wave in the
display (about 3V peak-to-peak at 1kHz) in a few
seconds, as shown in Figure 1-7.
(4) Repeat these steps to check CH2. Press the [OFF]
Figure 1-7
Probe compensation signal
Probe Compensation
When connecting the probe to any input channel for the
first 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 compensation as follows :
13
UTD4000 Operating Manual
1. In the CH1 menu set the probe to 10X. Move the
switch on the probe to 10X and connect the probe to
CH1. Connect the probe tip to the probe
compensator’s signal output connector, then connect
the ground clamp to the ground wire connector of the
probe compensator. Display CH1 and press [AUTO].
2. Observe the shape of the displayed waveform.
Overcompensation
Correct Compensation
Undercompensation
Figure 1-8 Probe
compensation calibration
14
3. If you see an “Undercompensation” or “Overcompensation” waveform display, adjust the adjustable tab
inside the adjustment hole at the tip of the probe with
the adjusting rod in the probe accessory pack, until a
“Correct Compensation” waveform shown in Figure 1-8
is displayed.
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
connected to HV power.
Automatic Setups for Waveform Display
Your UTD4000 oscilloscope features an autoset function. It can automatically adjust the vertical deflection
factor, scanning time base and trigger mode based on
the input signal, until the most appropriate waveform is
displayed. The autoset function can only be operated
when the signal to be measured is 50Hz or above and
the duty ratio is larger than 1%.
UTD4000 Operating Manual
Using the Autoset Function :
1. Connect the signal to be tested to the signal input
channel.
2. Press [AUTO]. The oscilloscope will automatically
set the vertical deflection factor, scanning time base
and trigger mode. Should you require to make more
detailed check, you can adjust manually after the autoset process until you get the optimal waveform display.
Getting to Know the Vertical System
As shown in the figure below, there are a series of
buttons and knobs in the vertical control zone. The
following steps will get you familiar with the use of
these controls.
Figure 1-9
Vertical controls
1. Turn the vertical position knob [POSITION] to
enable the waveform to display the signal in the centre
of the window. The vertical position knob controls the
vertical display position of the signal. When you turn
the vertical position knob, the sign indicating vertical
reference of the [GROUND] channel will move up and
down with the waveform.
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UTD4000 Operating Manual
Measurement Tips
If the channel coupling is DC, you can test the
signal’s DC quickly by checking the difference
between the waveform and signal ground.
In the case of AC coupling, the DC within the signal
will be intercepted. In this coupling mode you can
display the AC of the signal with higher sensitivity.
Shortcut key for resetting the vertical position of
the dual analog channel to zero [SET TO ZERO]
This shortcut key can reset vertical shift, horizontal
shift and holdoff to the zero position (center point).
2. Change the vertical setups and check 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 VOLTS/DIV knob to change the vertical
VOLT/DIV range. You will find that the range in the
16
current status column changes accordingly. Press
[CH1], [CH2], [MATH] or [REF] and the screen will
show the operation menu, icon, waveform and range
status information of the corresponding channel. Press
[OFF] to close the selected channel.
Getting to Know the Horizontal System
Horizontal controls are shown in the figure below. The
following steps will get you familiar with horizontal time
base setups.
Figure 1-10
Horizontal controls
UTD4000 Operating Manual
1. Use the horizontal SEC/DIV knob to change the
horizontal time base setup. Turn the horizontal
SEC/DIV knob to change the SEC/DIV time base
range. You will find that the time base range in the
current status column of the corresponding channel
changes accordingly. Range of horizontal scanning
rate is 5ns~50s/div (UTD4102C), in steps of 1-2-5.
* Note : Minimum time base range of the
UTD4000 Series varies from model to model.
2. Use the horizontal [POSITION] knob to adjust the
horizontal position of the signal in the waveform
window. When the horizontal [POSITION] knob is
turned, you can see that the waveform moves horizontally with the knob.
3. Press [MENU] to display the ZOOM and dual time
base menu. In this menu press [F1] to activate window
expansion. Then press [F1] again to quit window
expansion and return to the main window. To access
dual time base setup, press [F3]. You can also set the
holdoff time with the multifunction control knob [ ].
Shortcut key for resetting the trigger point shift to
horizontal zero position
When trigger point has moved from the horizontal
centre point considerably by way of horizontal shift,
pressing the shortcut key [SET TO ZERO] can quickly
reset the trigger point to the vertical centre point. You
can also turn the knob to make adjustments.
Definition
Trigger point means the actual trigger point relative
to the centre point of the storage device. When it is at
the horizontal centre point, it is also at the centre
point of the storage device. By turning the horizontal
knob, you can move the trigger point horizontally.
Holdoff means the time interval until the trigger
circuit is next reactivated. Turn the multifunction
control knob to set the holdoff time. By adjusting the
holdoff time, you can observe combination or complex signals more effectively.
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UTD4000 Operating Manual
Getting to Know the Trigger System
Trigger controls are shown in the figure 1-11. The
following steps will get you familiar with trigger setups.
1. Use the trigger level knob to change the trigger
level. The trigger level line on the screen will move up
and down with the knob. While you move the trigger
level, you will find the trigger level value at the bottom
of the screen changing accordingly.
2. Open the [TRIGGER MENU] (see Figure 1-12) to
change trigger setups. General setups are as follows :
Press [F1] twice to select the edge as [TRIGGER
TYPE].
Press [F2] to select CH1 as [TRIGGER SOURCE]
(Select with the multifunction control knob then press
[SELECT] to confirm).
Press [F3] then [F1] to set [TRIGGER COUPLING] as
DC.
Press [F4] then [F1] to set [TRIGGER MODE] as
AUTO.
Press [F5] to set [EDGE TYPE] as RISING.
18
Figure 1-11
Trigger controls
Figure 1-12
Trigger menu
3. Press the [50%] button and set the trigger level at
the vertical centre point of the trigger signal amplitude.
4. Press [FORCE] to generate a compulsory trigger
signal that is mainly used in the normal and single
trigger modes.
UTD4000 Operating Manual
Chapter 2
Instrument Setups
You should be familiar with basic operation of the vertical controls, horizontal controls and trigger system
menu of your UTD4000 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 :
Setting up the vertical system ([CH1], [CH2],
[MATH], [REF], [OFF], [VERTICAL POSI
TION], [VOLTS/DIV])
Setting up the horizontal system ([MENU],
[HORIZONTAL POSITION], [SEC/DIV]
Setting up the trigger system ([TRIGGER
LEVEL], [MENU], [50%], [FORCE])
Setting up the sampling method ([ACQUIRE])
Setting up the display mode ([DISPLAY])
Save and transfer ([STORAGE])
Setting up the utility function ([UTILITY])
Automatic measurement ([MEASURE])
Cursor measurement ([CURSOR])
Using the auto setup, run/stop buttons
([AUTO], [RUN/STOP])
Logic analyzer [LA]
Digital multimeter [DMM]
It is recommended that you read this chapter carefully
to understand the various measurement functions and
system operation steps of your UTD4000 Series Oscilloscope.
Setting Up the Vertical System
CH1, CH2 and setups
Each channel has its own vertical menu. You should
set up each item for each channel individually. Press
the [CH1] or [CH2] function button and the system will
display the operation menu for CH1 or CH2. For
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UTD4000 Operating Manual
Table 2-1 Explanatory notes for channel menu
Function Menu
Coupling
BW Limit
Volts/Div
Probe
Invert
20
Setup
DC 1MΩ
AC 1MΩ
GND
Full
20M
Coarse
Fine
1X
10X
100X
1000X
On
Off
Explanatory Note
AC and DC quantities of input signal is allowed to pass.
DC quantities of the input signal are intercepted.
DC level of the channel input terminal upon equivalent grounding is displayed.
Full bandwidth.
Limit bandwidth to 20MHz to reduce noise display.
Coarse tune in steps of 1-2-5 to set up the deflection factor of the vertical
system. Fine tune means further tuning within the coarse tune setup range to
improve the vertical pixel aspect ratio.
Select one of the values based on the probe attenuation factor to keep the
vertical deflection factor reading correct. There are four values : 1X, 10X, 100X
and 1000X.
Waveform invert function on.
Normal waveform display.
UTD4000 Operating Manual
1. Setting up channel coupling
Take the example of applying a signal to CH1. The
signal being tested is a sine signal that contains DC .
Press [F1] then [F2] to select AC. It is now set up as
AC coupling. DC quantities of the signal being tested
will be intercepted. The waveform display is as follows :
DC coupling
setup
AC coupling
setup
Figure 2-2 Both DC and AC
quantities of the signal are displayed
Figure 2-1 DC quantities of the signal are intercepted
Press [F1] twice to select DC. Both DC and AC quantities of the testing signal being inputted to CH1 can
pass through. The waveform display is as follows :
Press [F1] then [F3] to select ground. It is now set up as
ground. The waveform display is as follows :
(Note : In this mode, although waveform is not
displayed, the signal remains connected to the channel
circuit)
21
UTD4000 Operating Manual
Ground
coupling setup
Full
bandwidth
Figure 2-3 Screen display for theground mode
2. Setting up the channel bandwidth
Take the example of applying a signal to CH1. The
signal being tested is a signal stacked with high
frequency quantities.
Press [CH1] to turn CH1 on. Next press [F2] then [F1]
to set channel bandwidth to full bandwidth. The signal
being measured can pass through even if it contains
high frequency quantities. The waveform display is as
follows :
22
Figure 2-4 Waveform display at full bandwidth
UTD4000 Operating Manual
Press [F2] then [F3]. All high frequency quantities
higher than 20MHz in the signal being tested will be
limited. The waveform display is as follows :
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 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.
Bandwidth
limit 20MHZ
Bandwidth limit icon
Figure 2-5 Waveform display
when bandwidth limit is on
Probe
attenuation factor
Vertical range movement
Figure 2-6 Setting up the probe
attenuation factor in the channel menu
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UTD4000 Operating Manual
4. Vertical VOLTS/DIV adjustment setup
You can adjust the VOLTS/DIV range of the vertical
deflection factor either in the coarse tune mode or fine
tune mode. In coarse tune mode, the VOLTS/DIV
range is 1mV/div~10V/div. Tuning is in steps of 1-2-5.
In fine tune mode, you can change the deflection factor
in even smaller steps within the current vertical range,
so as to continuously adjust the vertical deflection
factor within the range of 1mV/div~10V/div without
interruption.
*Note: VOLTS/DIV range of vertical deflection factor of
the UTD4000 series varies from model to model.
Fine
tune setup
24
Figure 2-7 Coarse tuning and fine
tuning the vertical deflection factor
5. Waveform inversion setup
Waveform inversion : The displayed signal is inverted
180 degrees with respect to the channel ground level.
Figure 2-8 shows the non-inverted waveform. Figure
2-9 shows the inverted waveform.
Non-inverted
Figure 2-8 Inversion setup for vertical
channel inversion (non-inverted)
UTD4000 Operating Manual
I. Operating Math Functions
Math functions are displays of +, -, ×,
, FFT mathematical results and digital filtering function of CH1 and
CH2 waveforms. (This function is disabled in the dual
time base)The menu is as follows :
Inverted waveform
Figure 2-9 Inversion setup for
vertical channel inversion (inverted)
Math range
Figure 2-10 Math functions
25
UTD4000 Operating Manual
Table 2-2 Explanatory notes for the Math menu
Explanatory Note
Function Menu
Setup
Type
Math
To carry out +, -, ×,
Source 1
CH1
Set operand 1 as CH1 waveform.
CH2
Set operand 1 as CH2 waveform.
Operator
+
Operand 1 + Operand 2
-
Operand 1 - Operand 2
×
Operand 1 x Operand 2
Operand 1
Source 2
Compress
functions.
Operand 2
FFT spectrum analysis
By using the FFT (Fast Fourier Transform) algorithm,
you can convert time domain signals (YT) into
frequency domain signals. With FFT, you can conveniently observe the following types of signals :
Measure the harmonic wave composition and
distortion of the system
Demonstrate the noise characteristics of the
DC power
Analyse oscillation
Table 2-3 Explanatory notes for the FFT menu
CH1
Set operand 2 as CH1 waveform.
CH2
Set operand 2 as CH2 waveform.
Function Menu
Setup
Type
FFT
/1
Scale the waveform by ratio.
/10
There are four ratios to choose
/100
from : 1/1, 1/10, 1/100, 1/1000.
Explanatory Note
To carry out FFT algorithm
functions.
Source
/1000
Windows
CH1
Set CH1 as math waveform.
CH2
Set CH2 as math waveform.
Hamming Set Hamming window function.
Blackman Set Blackman window function.
Rectangle Set Rectangle window function.
Hanning
26
Set Hanning window function.
UTD4000 Operating Manual
How to use FFT functions
Signals with DC quantities or DC offset will cause
error or offset of FFT waveform quantities. To
reduce DC quantities, select AC coupling. To
reduce random noise and frequency aliasing
resulted by repeated or single pulse event, set
the acquiring mode of your oscilloscope to average acquisition.
Select the FFT Window
Assuming the YT waveform is constantly repeating
itself, the oscilloscope will carry out FFT conversion of
time record of a limited length. When this cycle is a
whole number, the YT waveform will have the same
amplitude at the start and finish. There is no waveform
interruption. However, if the YT waveform cycle is not a
whole number, there will be different amplitudes at the
start and finish, resulting in transient interruption of
high frequency at the connection point. In frequency
domain, this is known as leakage. To avoid leakage,
multiply the original waveform by one window function
to set the value to 0 for start and finish compulsively.
For application of the window function, please see the
table below :
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UTD4000 Operating Manual
Table 2-4
FFT
Rectangle
Hanning
Hamming
Blackman
Feature
The best frequency recognition rate, the
worst amplitude recognition rate.
Basically similar to a status without
adding window.
Frequency recognition rate is better
than the rectangle window, but amplitude recognition rate is poorer.
Frequency recognition rate is marginally
better than Hanning window.
The best amplitude recognition rate and
the poorest frequency recognition rate.
Most Suitable Measurement Item
Temporary or fast pulse. Signal level is generally
the same before and after. Equal sine wave of
very similar frequency. There is broad-band
random noise with slow moving wave spectrum.
Sine, cyclical and narrow-band random noise.
Temporary or fast pulse. Signal level varies
greatly before and after.
Mainly for single-frequency signals to search for
higher-order harmonic wave.
Definition :
FTT recognition rate : It means the quotient of the sampling and math points. When math point value is fixed,
the sampling rate should be as low as possible relative to the FFT recognition rate.
Nyquist frequency : To rebuild the original waveform, at least 2f sampling rate should be used for waveform
with a maximum frequency of f. This is known as Nyquist stability criterion, where f is the Nyquist frequency
and 2f is the Nyquist sampling rate.
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UTD4000 Operating Manual
Digital Filtering Function
Function Menu
Type
Signal source
Filtering Type
Minimum Frequency
Maximum Frequency
Setup
Filter
CH1
CH2
Low pass
High pass
Band pass
Explanatory Note
Digital filtering
Set CH1 as filter target.
Set CH2 as filter target.
Set the filter to low-pass filtering.
Set the filter to high-pass filtering.
Set the filter to band-pass filtering.
Set the minimum frequency with
the multifunction control knob.
Set the maximum frequency with
the multifunction control knob.
II. Reference Waveform
Display of the saved reference waveforms can be set on or off in the [REF] menu. The waveforms are saved in the
non volatile memory of the oscilloscope or an external USB device and are identified with the following names : RefA,
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UTD4000 Operating Manual
RefB. To display (recall) or hide (off) the reference
waveforms, take the following steps :
1. Press the [REF] menu button on the front panel.
2. Press [CALL BACK]. Select the signal source by
turning the multifunction control knob on the upper part
of the front panel. You can choose from 1 to 10. After
selecting a numeral for saved waveform, e.g. 1, press
[SELECT] to recall the waveform which was originally
stored in that position. For instructions on storing or
recalling reference waveforms on the USB device,
read “Storage and Recall”.
3. Press RefB (RefB reference option). Select the
second signal source for the math function by repeating step 2.
In actual application, when using your UTD4000 to measure and observe such waveforms, you can compare
the current waveform with the reference waveform for
analysis. Press [REF] to display the reference waveform menu. For setup please refer to Table 2-5.
4. To close the reference waveform, press [OFF] in
30
the vertical zone.
Note : When [AUTO] is pressed after a reference
waveform is recalled, that waveform will remain.
Table 2-5 Selecting the storage position
Function Menu Setup
Explanatory Note
Ref Wave
REF A Select the REF A reference
option.
REF B Select the REF B reference
option.
Load...
Recall a waveform stored in
any of the 10 with the
multifunction control knob,
then press [SELECT] to
confirm.
Import
Recall a reference waveform
stored on the USB device.
UTD4000 Operating Manual
To select an internal storage position, choose between
1 and 10. In the case of external storage device, plug
in the USB device, then press [F5], then press [F1] and
the multifunction control knob to select the corresponding file name.
To save a reference waveform on the USB device, see
the [STORAGE] menu.
Table 2-6
Function Menu
Setup
Main
Window
Extended
Explanatory Note
Press [F1] to switch
between “main window”
and “window extension”.
Mode
Main time base or dual
time base.
M1 Base
Setting Up the Horizontal System Horizontal Control Knobs
Select the channel to be
displayed : CH1 or CH2.
Dual Xbase
X Adjust
Select main time base
M1 or delay time base
M2.
There are two horizontal control knobs : The SED/DIV
knob is for changing the horizontal time base, while the
horizontal shift knob is for changing the relative
position of the trigger point on the screen.
M2 Shift
coarse tune shift.
Adjust holdoff time with
Holdoff
Horizontal control knob : Display the horizontal menu
(see Table 2-6).
Select fine tune or
the multifunction control
knob.
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UTD4000 Operating Manual
Definitions of Horizontal
Parameter Icons
1 The signal frequency
currently selected as the
trigger source.
2 Position of the current
waveform triggering point.
3 Trigger level of the
current waveform.
4 The distance between
Figure 2-11 Horizontal
the triggering position and
system control interface
the horizontal centre point
(time).
5 Time base of the main
time base M1, i.e. SEC/DIV.
1
2
5
4
3
Figure 2-12 Definitions of horizontal parameter icons
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UTD4000 Operating Manual
Window Extension
Window extension can be used to zoom in a band of
waveform to check image details, as shown in Figure
2-13.
Horizontal extension of the waveform
In the window extension mode, the display is divided
into two zones as shown above. The upper part
displays the original waveform, and the lower part
displays the extended waveform. You select the waveform area to be magnified by turning the horizontal
POSITION knob and SEC/DIV knob.
Dual Time Base Function
Main window
Extended window
The dual time base function is similar to window extension but there is a fundamental difference. In the extension time base mode you can magnify the waveform
100 times, whereas in the dual time base mode you
can magnify details of the waveform being observed by
thousands of times. In effect, the main time base
storage depth is increased by thousands of times.
The horizontally extended waveform
Figure 2-13 Display with the window extended
Dual time base operation instructions :
Press the horizontal setup menu then press [F3] to
enter the dual time base menu. Press [F1] to activate
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UTD4000 Operating Manual
the dual time base function. To open CH1 or CH2
under the dual time base mode, select by pressing
[F2]. To select M1 or M2 as the activated time base,
press [F3] (M2 is the delayed scanning time base).
Delayed time
base M2
Main time
base M1
Figure 2-14 Dual time base
34
Setting up the Trigger System
Triggering decides when the oscilloscope collects data
and display waveforms. Once the trigger is correctly
set up, it offers stable display of the waveform being
observed. When beginning to acquire data, the digital
storage oscilloscope first collects data required for
pre-trigger. When the trigger condition arises, it will
continue to acquire the remaining data.
The trigger control zone on the operation panel of your
digital storage oscilloscope comprises a trigger level
adjustment knob, a trigger menu button [MENU], [50%]
for setting up the trigger level at the vertical centre
point of the signal, and a compulsory trigger button
[FORCE].
Trigger level : Trigger level sets the trigger point of the
signal being tested.
[50%] : Setting the trigger level at the vertical centre
point of the trigger signal amplitude.
UTD4000 Operating Manual
[FORCE] : To generate a compulsory trigger signal.
Mainly used in the trigger mode and “Normal” and
“Single” modes.
[MENU] : Button for the trigger setup menu.
Trigger Control
Trigger modes : Edge, pulse, video, slew rate and
logic analyzer (LA).
Edge trigger : Trigger is set to occur when the signal
is at the rising or falling edge. You can set the trigger
level to change the trigger point’s vertical position on
the trigger edge, i.e. the intersection point of the trigger
level line and the signal edge on the screen.
Pulse trigger : When the pulse width of the trigger
signal reaches a preset trigger condition, trigger
occurs.
Video trigger : Carry out field or line trigger to standard video signals.
Slew rate trigger : Trigger condition is the signal rising
or falling rate.
LA trigger : Trigger condition is the pattern or duration
input by the logic analyzer. To use this trigger mode
you must have a LA probe installed and turned on.
Below are notes for various trigger menus.
Edge Trigger : For edge trigger menu setups please
see Table 2-7.
Explanatory Note
Function Menu Setup
Type
Source...
Edge
CH1 Set CH1 as the signal source trigger
signal.
CH2 Set CH2 as the signal source trigger
signal.
EXT Set the external trigger input channel
as the signal source trigger signal.
EXT/5 Divide the external trigger model by
5.
LINE Set grid trigger.
CH1& CH1 and CH2 trigger their respective
CH2 signals alternately.
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UTD4000 Operating Manual
Table 2-7 (Con’t)
Function Menu
Setup
D0-D15
Coupling
DC
AC
LF Reject
HF Reject
Mode
Auto
Normal
Single
Slope
36
Fall
Rise
Rise-Fall
Explanatory Note
Set one of the channels between D0-D15 as the signal
source trigger signal (the LA function must be enabled).
Allow AC and DC quantities of the input signal to pass.
Intercept DC quantities of the input signal.
Reject low frequency quantities below 80kHz of the signal.
Reject high frequency quantities above 80kHz of the
signal.
Set to sample waveform only if no trigger condition is
detected.
Set to sampling waveform only when trigger condition is
met.
Set to sample waveform once when detecting one trigger
and then stop.
Set to trigger at the signal’s falling edge.
Set to trigger at the signal’s rising edge.
Set to trigger at the signal’s rising and falling edges.
UTD4000 Operating Manual
Pulse Trigger
Pulse trigger means determining the triggering time based on the pulse width. You can acquire abnormal pulse by
setting the pulse width condition.
Table 2-8
Explanatory Note
Setup
Function Menu
Pulse
Type
Set CH1 as the signal source trigger signal.
CH1
Source...
Set CH2 as the signal source trigger signal.
CH2
Set the external trigger input channel as the signal source
EXT
trigger signal.
Divide the external trigger source by 5 to extend the trigger
EXT/5
level range.
Set grid trigger.
LINE
CH1 and CH2 trigger their respective signals alternately.
CH1 & CH2
Set one of the channels between D0-D15 as the signal
source trigger signal (the LA function must be enabled).
D0-D15
Allow AC and DC quantities of the input signal to pass.
DC
Coupling
Intercept DC quantities of the input signal.
AC
Reject low frequency quantities below 80kHz of the signal.
LF Reject
Reject high frequency quantities above 80kHz of the signal.
HF Reject
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UTD4000 Operating Manual
Table 2-8 (Con’t)
Function Menu
Mode
Setup
Auto
Normal
Pulse Setup
Single
See Table 2-9
Explanatory Note
The system automatically acquires waveform data when there is
no trigger signal input. The scan baseline is shown on the display.
When the trigger signal is generated, it automatically turns to
trigger scan.
The system stops acquiring data when there is no trigger signal.
When the trigger signal is generated, trigger scan occurs.
One trigger will occur when there is an input trigger signal. Then
trigger will stop.
Set the pulse width.
Table 2-9 Pulse width setup
Polarity
When
Setting
Back
38
Positive
Negative
<
>
=
Set the positive pulse width as the trigger signal.
Set the negative pulse width as the trigger signal.
Trigger occurs when pulse width is smaller than the set value.
Trigger occurs when pulse width is larger than the set value.
Trigger occurs when pulse width equals to the set value.
Set pulse width to 20ns-10s with the multifunction control knob
on the front panel.
Return to Table 2-8.
UTD4000 Operating Manual
Video Trigger
By selecting video trigger, you can carry out field or line trigger with NTSC or PAL standard video signals. Trigger
menus are as follows :
Table 2-10a Video setup
Table 2-10 Video trigger setup
Function Menu
Setup
Explanatory Note
Type
Video
Source...
CH1
Set CH1 as the trigger signal.
CH2
Set CH2 as the trigger signal.
EXT
Set the external trigger input channel as the trigger signal.
EXT/5
Attenuate the external trigger source 5 times as the trigger signal.
LINE
Set grid as the trigger signal.
CH1 & CH2
Set CH1 and CH2 as alternate trigger signals.
Video Setup
See Table 2-10a
Standard
Sync
Back
PAL
NTSC
Odd Field
Even Field
All Lines
Lines Num
Suitable for PAL video signals.
Suitable for NTSC video signals.
Set the video odd field to synchronized trigger.
Set the video even field to synchronized trigger.
Set the line signal to synchronize with trigger.
Set synchronized trigger on the specified line and adjust by
turning the multifunction control knob on the upper front panel.
Return to Table 2-10.
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UTD4000 Operating Manual
When PAL is selected for video and synchronization
mode is line, you will see a screen display as shown
in Figure 2-15. When synchronization mode is field,
you will see a screen display as shown in Figure
2-16.
Figure 2-15 Video trigger : line synchronization
40
Slew Rate Trigger
When slew rate trigger is selected, trigger occurs if
the slew rate of the signal’s rising or falling edge is the
same as the default value. Below is the trigger menu :
Table 2-11
Figure 2-16 Video trigger : field
synchronization Slew Rate Trigger
UTD4000 Operating Manual
Table 2-11
Function Menu
Type
Source...
Coupling
Setup
Slope
CH1
CH2
EXT
EXT/5
LINE
CH1 & CH2
DC
AC
LF Reject
HF Reject
Mode
Auto
Explanatory Note
Set CH1 as the signal source trigger signal.
Set CH2 as the signal source trigger signal.
Set the external trigger input channel as the signal source trigger signal.
Divide the external trigger source by 5 times.
Set grid trigger.
CH1 and CH2 trigger their respective signals alternately.
Allow AC and DC quantities of the trigger signal to pass.
Intercept DC quantities of the trigger signal.
Reject low frequency quantities and allow only high frequency quantities
to pass.
Reject high frequency quantities and allow only low frequency quantities
to pass.
The system automatically acquires waveform data when there is no
trigger signal input. The scan baseline is shown on the display. When the
trigger signal is generated, it automatically turns to trigger scan.
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UTD4000 Operating Manual
Table 2-11 (Con’t)
Mode
Normal
The system stops acquiring data when there is no trigger signal. When the
trigger signal is generated, trigger scan occurs.
Single
One trigger will occur when there is an input trigger signal. Then trigger will
stop.
Slope Setup
Polarity
Rise/fall setup.
When
Set slew rate to : larger than/smaller than/equalling to with the multifunction
Slew Rate
control knob on the front panel.
Threshold
Low level/high level/High low level setup.
Back
Return to the previous menu.
LA Trigger
First enable the LA function, then select LA trigger. Trigger menu is as follows (Table 2-12):
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UTD4000 Operating Manual
Table 2-12
Function Menu
Type
Sub Type
Code...
Setup
LA
Code/Persist
Mode
Auto
Normal
Single
Persist Setup
When
Setup
Clock Setup
Clk Source
Clk Edge
Back
Explanatory Note
Select LA trigger as the trigger type.
Select pattern or duration as the sub-type.
Turn the multifunction control knob and [SELECT] key to set the high and
low levels for each of the 16-width values.
The system automatically acquires waveform data when there is no trigger
signal input. The scan baseline is shown on the display. When the trigger
signal is generated, it automatically turns to trigger scan.
The system stops acquiring data when there is no trigger signal. When the
trigger signal is generated, trigger scan occurs.
One trigger will occur when there is an input trigger signal. Then trigger will
stop.
Select above, below or equivalent.
Set a duration that satisfies the “condition” with the multifunction control
knob.
Select the source with the multifunction control knob.
Select the rising or falling edge of the clock.
Return to the previous menu level.
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UTD4000 Operating Manual
Alternate Trigger
When alternate trigger is selected, the trigger
signal will be present in two vertical channels.
This triggering mode is suitable for observing two
signals of unrelated signal frequencies. The
Alternate trigger menu can also be used to compare pulse widths.
Table 2-13
Function Menu
Window
Setup
Dual Xbase
Mode
M1 Base
Adjusting the Holdoff Time
X Adjust
You can adjust the holdoff time to observe complicated
waveforms (e.g. pulse string series). Holdoff time
means the data acquisition cycle of the digital storage
oscilloscope. It is an exact multiple of the cycle of the
complicated waveform being tested, thus synchronization is possible. For example, you can display one
group of pulse series stably by adjusting holdoff time,
as shown in Figure 2-17.
For the holdoff menu please see the table 2-13 :
44
M2 Shift
Holdoff
Explanatory Note
Press [F1] to switch
between “main window” and
“window extension”.
Main time base or dual time
base.
For the selection of displaying CH1 or CH2.
Selecting main time base
M1 or delay time base M2.
Selecting fine tune or coarse
tune shift.
Adjust holdoff time with the
multifunction control knob.
UTD4000 Operating Manual
Trigger
position
Figure 2-17 Use the holdoff function
to synchronize complicated waveforms
Operation
1. Follow the normal signal synchronization procedure and select the edge and trigger source in the
trigger [MENU]. Adjust the trigger level to make the
waveform display as stable as possible.
2. Press the horizontal [MENU] key to display the
horizontal menu.
3. Adjust the multifunction control knob in the upper
front panel. The holdoff time will change accordingly
until the waveform display is stable.
Operation tips : Holdoff time is usually shorter than
the “big cycle” time. When observing the RS232 communication signal, it is easier to observe if the holdoff
time is slightly shorter than the starting edge time of
every datum.
1. Trigger source : This means the signal for trigger.
Trigger can be obtained from various sources : Input
channel (CH1, CH2), external trigger (EXT, EXT/5),
grid, CH1 and CH2 alternate.
Input Channel : The most common trigger source
is input channel (choose CH1 or CH2). The selected
trigger source can operate normally whether the input
is displayed or not.
External Trigger : This type of trigger source can
be directly input through the external trigger input
terminal. For example, you can use an external clock
or the signal from a circuit to be tested as the trigger
source. Both EXT and EXT/5 trigger sources use
external trigger signals from the EXT TRIG adaptor.
EXT can use the signals directly. You can use EXT
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UTD4000 Operating Manual
46
within the trigger level range of –3V and +3V. EXT/5
divide the trigger by 5. As a result, trigger range is
extended to –15V to +15V, enabling the oscilloscope to
trigger at a large signal.
*Note: The trigger level range of the UTD4000 series
varies from model to model.
Grid : means the grid power source. This trigger
mode is suitable for observing signals related to the
grid - e.g. the correlation between lighting equipment
and power source equipment - to achieve stable
synchronization.
2. Trigger mode : To cause the digital storage oscilloscope to generate a trigger signal. This oscilloscope
offers three trigger modes for selection : auto, normal
and single.
Auto Trigger : The system will sample waveform
data automatically when there is no trigger signal
input. The scan baseline is shown on the display.
When the trigger signal is generated, it automatically
turns to trigger scan for signal synchronization.
Note : When time base of the scan range is set to
50ms/div or slower, the “Auto” mode is a continuous
scanning process.
Normal Trigger : In this mode, your oscilloscope
samples waveforms only when triggering conditions
are met. The system stops acquiring data and waits
when there is no trigger signal. When the trigger signal
is generated, trigger scan occurs.
Single Trigger : In this mode, you only have to
press the “Run” button once and the oscilloscope will
wait for trigger. One sampling will occur and the
acquired waveform will be displayed when the digital
storage oscilloscope detects a trigger. Then trigger will
stop.
3.
Trigger coupling : Trigger coupling determines
which quantities of the signal are transmitted to the
trigger circuit. Coupling modes are DC, AC, low
frequency suppression and high frequency suppression.
DC : Allowing all quantities to pass.
AC : Intercepting DC quantities and attenuating
signals under 10Hz.
UTD4000 Operating Manual
Low Frequency Suppression : Intercepting DC
quantities and attenuating low frequency quantities
under 80kHz.
High Frequency Suppression : Attenuating high
frequency quantities over 80kHz.
4. Pretrigger/Delayed Trigger :Data sampled
before/after triggering.
The trigger position is typically set at the horizontal center of the screen. In this case, you are able to
view 5 divisions of pretrigger waveform and 5 divisions
of post-trigger waveform. By turning the horizontal
shift knob [POSITION] clockwise to adjust horizontal
displacement of the waveform, you can see more
pretrigger information, i.e see more waveform details
before trigger occurs. For example, you can detect the
glitch that occurs when the circuitry starts. Observation and analysis of pretrigger data can help you identify the cause of glitch.
Setting Up the Sampling System
As shown below, [ACQUIRE] button in the control zone
is the function key for the sampling system.
Figure 2-18 Function key for the sampling system
Press the [ACQUIRE] button to pop up the sampling
setup menu. You can use this menu to adjust the sampling mode.
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UTD4000 Operating Manual
Table 2-14 Sampling menu
Function Menu
Setup
Acquisition
Normal
Peak
Averages
Turn on the ordinary sampling mode.
Turn on the peak detect mode.
Average
Set to average sampling and display the average number of times.
Envelop
Use the peak detect mode for every independent acquisition.
2~256
Set the average number of times in multiples of 2, i.e. 2, 4, 8, 16,
32, 64, 128, 256. To change the average number of times, use the
(when average
multifunction control knob shown in Figure 2-18.
sampling is selected)
Mem Length
Explanatory Note
Normal
Long Mem
Set normal length of samping data
Set long length of samping data (long storage is disabled when the
logic analyzer is on and dual time base is in operation).
Fast ACQ
On
Acquire at a high screen refresh rate for more realistic reflection of
waveform status.
Off
48
Close the quick acquisition function.
UTD4000 Operating Manual
By changing sampling setup, you can observe the
consequent changes in waveform display. If the signal
contains considerable noise, you will see the following
displays when average sampling is not selected and
when 32-time average sampling is selected. For sampling waveform display please see Figure 2-19 and
Figure 2-20.
Figure 2-20 Waveform display when
32-time average sampling is selected
Definitions :
Figure 2-19 Waveform without average sampling
Normal mode : The digital storage oscilloscope
acquires signal sample at equal and regular intervals to reconstruct the waveform.
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UTD4000 Operating Manual
Peak detect mode : In this acquisition mode, the
digital storage oscilloscope identifies the biggest
and smallest values of the input signals at each
sampling interval and uses these values to
display the waveform. In effect, it can acquire and
display narrow pulse which would otherwise be
omitted in the sampling mode. Noise seems to be
more significant in this mode.
Average mode : The digital storage oscilloscope
acquires several waveforms and takes the average value to display the final waveform. You can
use this mode to reduce random noise.
Envelop mode : Waveforms of different amplitudes are acquired. Sampling points of all relative
triggering points recorded at the same time are
calculated, and the maximum value and minimum
value are displayed. In the envelop mode, peak
detection is carried out for every single acquisition.
50
Setting Up the Display System
As shown below, the [DISPLAY] button in the control
zone is the function key for the display system.
Figure 2-21 Function key for
the sampling system (display)
Press the [DISPLAY] button to pop out the setup menu
shown below. You can use this menu to adjust the
display mode.
UTD4000 Operating Manual
Table 2-15 Display menu
Function Menu
Format
Type
Graticule
Persist
Setup
YT
XY
Vectors
Points
Full
Grid
Cross Hair
Frame
Auto
1s
2s
5s
Infinite
Intensity
1-32
Explanatory Note
Operating mode of the oscilloscope.
X-Y is the display mode; CH1 is X input, CH2 is Y input.
Sampling points are linked for display.
Sampling points are directly displayed.
Set the grid display mode of the waveform zone to full, grid, crosshair or frame.
Waveform on the screen is refreshed at normal rate.
Waveform on the screen is maintained for 1 second and then
refreshed.
Waveform on the screen is maintained for 2 seconds and then
refreshed.
Waveform on the screen is maintained for 5 seconds and then
refreshed.
Waveform on the screen remains on display. New data will be
added continuously until this function is disabled.
In “quick acquisition” mode, intensity of the waveform can be
adjusted with the multifunction control knob.
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UTD4000 Operating Manual
X-Y Mode
This mode is suitable for CH1 and CH2 only. After
selecting the X-Y display mode, the horizontal axis will
display the CH1 signal, while the vertical axis will
display the CH2 signal.
Figure 2-22 Waveform display in X-Y mode
52
Caution :
In the normal X-Y mode, you can adjust waveform
amplitude with VOLTS/DIV of the two channels.
Adjusting the SEC/DIV time base knob will result in a
lissajous figure of better display quality.
The following functions are disabled in the X-Y display
mode :
Automatic measurement mode
Cursor measurement mode
Reference or maths waveform
Vector display type
Horizontal [POSITION] knob
Trigger control
Key points :
Display Type : Vector display fills the space between
adjacent sampling points in display. The dot mode
displays only the sampling points.
Refresh Rate : Refresh rate is the number of times the
digital storage oscilloscope refreshes the waveform
display per second. The refreshing speed affects the
capability to observe signal movements speedily.
UTD4000 Operating Manual
Definitions
Y-T Mode : In this mode the Y axis indicates
voltage and the X axis indicates time.
X-Y Mode : In this mode the X axis indicates CH1
voltage and the Y axis indicates CH2 voltage.
Slow Scanning Mode : When horizontal time
base control is set at 50ms/div or slower, the unit
will operate in the slow scan sampling mode.
When observing low frequency signals in slow
scanning mode, it is advised to set the channel
coupling as DC.
S/div : A horizontal scaling (time base) unit. If
waveform sampling is stopped (by pressing the
[RUN/STOP] button), time base control can
expand or compress the waveform.
Storage and Recall
As shown below, the [STORAGE] button in the control
zone is the function key for the storage system.
Figure 2-23 Function key for
the sampling system (storage)
Press the [STORAGE] button to display the setup
menu. You can use this menu to save and recall waveforms or setup document stored on the oscilloscope
built in memory or a USB device.
Steps :
Press [STORAGE] to go to the type menu. There are
three types to choose from : waveform, setup and
bitmap.
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UTD4000 Operating Manual
1. Select reference waveform to go to the waveform storage menu shown below (see Table 2-16). A stored reference
waveform can be recalled with the [REF] key (see “Reference waveform”, page 29). For specific steps please see
[REF] operation instructions
Table 2-16 Reference waveform storage menu
Function Menu
Setup
Explanatory Note
Type
Wave
Select the waveform storage and recall menu.
Siource
CH1
Select the waveform from CH1.
CH2
Select the waveform from CH2.
1~10
With the multifunction control knob, set and select the position in which
Save...
the reference waveform is to be stored in the built-in memory.
Export
Filename
Select the default name “UNI T0000” for the reference waveform file
being exported to the USB device with the multifunction control knob.
Format
OK
54
Set the format as : internal or CSV.
Export the reference waveform to the USB device.
UTD4000 Operating Manual
2. Select setup to enter the setup storage menu. See Table 2-17.
Table 2-17 Storage menu setup
Function Menu
Setup
Explanatory Note
Setting
Save the current front panel setup status.
Save...
Select a save position with the multifunction control knob on the front
panel (total 10 sets) and save the setup.
Load...
Import
Recall the saved setup status.
Filename
Name the reference waveform file being imported from the USB device
with the multifunction control knob.
OK
If the document exists on the USB device, it will be imported. Otherwise
the system will indicate “I/O operation failure”.
Export
Filename
Name the reference waveform file being exported to the USB device with
the multifunction control knob.
OK
The current front panel setup status is exported.
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UTD4000 Operating Manual
3. Select bitmap to enter the bitmap storage menu. See
Setting up Utility Functions
Table 2-18.
Note : This function can be recalled and used only
As shown below, the [UTILITY] button in the control
when the USB device is inserted.
zone is the function key for alternative functions.
Table 2-18
Bitmap storage menu
Function Menu
Setup
Export the display data to the USB device in bmp format.
Bitmap
Export
Explanatory Note
Filename
Default name of the file being exported to the USB device
is “UNI T0000.BMP”.
OK
Press this key to export to the USB device.
About INTERNAL and CSV formats : You can select
Internal or CSV format when you export the reference
waveform to the USB device. In Internal format, it can
only be imported to the oscilloscope in REF and not
any other interface. In CSV format, it can be opened in
EXCEL as it is a set of 2-dimensional data of voltage
and time correlation.
56
Figure 2-24 Function key for
the sampling system (function)
Press the [UTILITY] button to pop up the setup menu
for utility functions. See Table 2-19.
UTD4000 Operating Manual
Table 2-19 Utility functions menu (1)
Function Menu
Configure
Preference
Setup
Self Cal
Version
Erase
RTC Setup
Default Set
Language...
Skin
Menu Display
Brightness
Pass/Fail
Enable
Output
Explanatory Note
Run auto system calibration.
Display information like oscilloscope software and hardware
versions.
Clear all saved reference waveforms and front panel status setups.
Set time and date.
Recall factory setup.
Select one of the languages.
Classic, traditional, modern.
Set the waiting time for automatic menu shutoff : 5s, 10s, 20s and
manual.
Adjust the brightness of the waveform style zone with the multifunction control knob.
Turn the testing function on or off (this function is disabled in the dual
time base and roll operation modes).
Set to output signal to pass or fail. The signal is output through the
PASS/FAIL interface at the rear of the oscilloscope.
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UTD4000 Operating Manual
Table 2-19 Utility functions menu (2)
Function Menu
Recording waveform
Next page 1/2
Setup
Source
Message
Operate
Stop Setup
Mask Setup
See Table 2-21
Explanatory Note
Designate testing type as CH1 or CH2.
Open or close the test result.
Run or stop the “PASS/FAIL” test.
Set the stop testing conditions.
Create a module of test conditions.
Setup for waveform recording.
Go to the next page.
Table 2-20 Utility functions menu (3)
Function Menu
Setup
Cymometer
On
Off
Interface
Next page 2/2
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Explanatory Note
Turn the frequency counter on.
Turn the frequency counter off.
Select LAN or GPIB interface;
To set address by multipurpose knob and select
key; then press close key to save new address
Return to the previous menu.
UTD4000 Operating Manual
Table 2-21 Waveform recording menu
Function Menu
Explanatory Note
Setup
(F2)
Stop recording
(F1)
1.
Playback button.
2.
When you press this button the system plays back and displays the
number of the rewinding screen in the top centre area. By turning the multifunction control knob on the upper front panel now, you can suspend
playback. Turn the knob further and you can select the waveform of a certain
screen to be played back repeatedly.
3.
If you wish to continue full playback, press [F2] to stop and then press
[F1].
4.
You can record as many as 100 screens data (If [AUTO] is pressed after
a waveform is recorded, it will be deleted).
(F3)
Record button. Press this button then the [MENU ON/OFF] key to record. The
number of screens recorded is displayed in the top centre area (This function
is disabled in dual time base, average, envelop, roll and long storage modes).
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UTD4000 Operating Manual
Important Points :
Auto Calibration : You can correct measurement
errors caused by environmental changes with the auto
calibration function. This process can be run selectively when necessary. To make calibration more accurate, power on your oscilloscope and allow 20 minutes
to warm up. Then press the [UTILIITY] button (help
function) and follow on-screen instructions.
Choose your language : Your UTD4000 can be operated in many languages. To select a display language,
press the [UTILITY] menu button and then
[LANGUAGE] in “Interface setup” to choose your
desired language.
Automatic Measurement
As shown below, the [MEASURE] button is the function key for auto measurement. Read the following
instructions to familiarize with all the powerful automatic measurement functions of your UTD4000.
60
Figure 2-25 Function keys of the
sampling system (auto measurement)
Application Examples
The measurement menu of your oscilloscope is
capable of measuring 27 waveform parameters.
Press [MEASURE] to enter the parameter measurement display menu which has 4 options that correspond to function keys F1~F4. To operate any
individual option, press the assigned function keys
[F1~F4] to enter the setup menu for that function.
You can measure voltage or time measurement. You
can select with the “Customize Parameters” option. To
enter the menu press [F2] and select the required
parameters with the multifunction control knob, then
UTD4000 Operating Manual
press [SELECT] to confirm (you can display up to 4
parameters). You can also press [F1] and select “All
Parameters” to show all voltage and time measurement parameters of the current channel. To quit “All
Parameters”, press [CLOSE].
Example 1 : To display the measurement peak-to-peak
value of CH2, follow the steps below :
1. Press [CH2] to select channel 2.
2. Press [MEASURE] to enter the measurement functions menu.
3. Press [F2] to enter the measurement parameters
options.
4. Turn the multifunction control knob to the peak-topeak value.
5. Press [SELECT] to confirm, then press [CLOSE] to
exit.
The peak-to-peak value is displayed in the left bottom
corner.
Example 2 : Setup for delayed measurement. You can
use the delayed measurement function to measure the
time interval between the rising edge of two signal
source, i.e. the time interval between the rising edge of
the first cycle of a certain signal source and the rising
edge of the first cycle of another signal source. Measure as follows :
1. As shown in the previous example, select rising
delay in the measurement parameters menu.
2. Press [SELECT] to display the rising delay parameter.
3. Press [CLOSE] to exit the parameter options.
4. The rising delay parameter is displayed in the left
bottom corner.
Automatic measurement of voltage parameters
Your UTD4000 can automatically measure the following
voltage parameters :
Peak-to-peak value (Vpp) : The voltage value from the
highest point to lowest point of the waveform.
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UTD4000 Operating Manual
Maximum value (Vmax) : The voltage value from the
highest point to ground (GND) of the waveform.
Minimum value (Vmin) : The voltage value from the
lowest point to ground (GND) of the waveform.
Amplitude value (Vamp) : The voltage value from top
to base of the waveform.
Mean(Vmid): Half of the sum of waveform top and
bottom voltage.
Top value (Vtop) : The voltage value from the level top
to ground (GND) of the waveform.
Base value (Vbase) : The voltage value from the level
base to ground (GND) of the waveform.
Overshoot : The ratio value of the difference between
maximum value and top value to the amplitude value
of the waveform.
Preshoot : The ratio value of the difference between
minimum value and base value to the amplitude value
of the waveform.
Average value : Average amplitude of signals within 1
cycle.
Root mean square value (Vrms) : The effective value.
62
Energy generated by AC signal conversion during 1
cycle with respect to the DC voltage that produces
equivalent energy, i.e. root mean square value.
Automatic measurement of time parameters
Your UTD4000 can automatically measure the
frequency, cycle, rising time, falling time, positive
pulse width, negative pulse width, delay 1 2 (rising
edge), delay 1 2 (falling edge), positive duty ratio,
negative duty ratio and 10 time parameters. Definitions of these parameters are as follows :
RiseTime : The time taken by the waveform amplitude
to rise from 10% to 90%.
FallTime : The time taken by the waveform amplitude
to fall from 90% to 10%.
Positive Pulse Width (+Width) : The pulse width when
positive pulse is at 50% amplitude.
Negative Pulse Width (-Width) : The pulse width when
negative pulse is at 50% amplitude.
Rising delay (Rise) : Delayed time of the rising edge of
CH1, CH2.
UTD4000 Operating Manual
Falling delay (Fall) : Delayed time of the falling edge of CH1, CH2.
Positive duty ratio (+Duty) : Ratio of positive pulse width to cycle.
Negative duty ratio (-Duty) : Ratio of negative pulse width to cycle.
Measurement menu
Operation : Press [MEASURE] to display 4 function options, as shown in the table below.
Table 2-22
Function Menu
All
Select
Indicators
Clear
Setup
Explanatory Note
Display all parameters. To close press [CLOSE].
Up to 4 parameters can be displayed on screen.
Visual indication of the measurement value’s
physical properties by lines.
Clear the finished parameters.
Note : Customized parameters are for quick parameter measurement. This device has 27 measurement parameters.
In general use, the user is not required to measure all parameters. Only a few have to be tested. In this case, set the
parameters you require as customized parameters. All such parameters will be displayed on the screen.
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UTD4000 Operating Manual
Figure 2-26 Measurement parameters
Cursor Measurement
Press [CURSOR] to display the measurement cursor
and cursor menu, then adjust the cursor position by
turning the multifunction control knob. As shown in the
figure below, [CURSOR] in the control zone is the
function key for cursor measurement.
64
Figure 2-27 Function key for
the sampling system (cursor)
There are two cursor measurement modes to choose
from the [CURSOR] menu : voltage and time. When
measuring voltage, press [SELECT] on the front
panel and the multifunction control knob to adjust the
positions of the two cursors for V measurement.
Likewise, by selecting time, you can measure t. The
[CURSOR] menu has two other modes. In the
independent mode, you can adjust the positions of
the two cursors independently. In the tracking mode,
you press [SELECT] and multifunction control knob to
move two cursors simultaneously.
1. Measuring voltage/time : Cursor 1 or cursor 2 will
appear simultaneously. Adjust their positions on the
screen with the multifunction control knob and select
UTD4000 Operating Manual
which cursor to adjust with the [SELECT] button. The displayed reading is the voltage or time value between the two
cursors.
2. When the cursor function is enabled, measurement value is automatically displayed in the top left corner.
Table 2-23
Function Menu
Setup
Explanatory Note
Type
Time
Set time as the measurement parameter.
Amplitude
Off
Mode
Independent
Set amplitude as the measurement parameter.
Close the automatic measurement function.
Adjust the difference between two cursors with the multifunction
control knob.
Tracking
Adjust the difference between two cursors with the multifunction
control knob or fix the difference and adjust the cursor positions.
V Units
Sec
Select time as the measurement parameter.
Hz
Select frequency as the measurement parameter.
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UTD4000 Operating Manual
Using the Run Button
There is a [RUN/STOP] button on the top right corner
of the front panel. When this button is pressed and a
green indicator lights up, your oscilloscope is in a
running status. When the red light comes on after
pressing this button again, it indicates the unit has
stopped operation.
Figure 2-28 RUN/STOP button
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Auto Setup :
As shown above, Auto Setup can simplify operation.
Press [AUTO] and the oscilloscope can automatically
adjust the vertical deflection factor and horizontal time
base range according to the amplitude and frequency
of the waveform, so as to ensure stable waveform
display. When the oscilloscope is in auto setup mode,
the system setup is as shown by Table 2-24 :
Table 2-24
Auto setup
Function Menu
Acquisition mode
Setup
Adjust to “sampling” or “peak
detect”.
Set to YT.
Display format
SEC/DIV
Adjusted according to signal
frequency.
Trigger coupling
AC
Trigger level
Set at 50%.
Trigger mode
Auto
Trigger source
Set to CH1 but if there is no
signal in CH1 and CH2
applies a signal, it will set to
CH2.
Trigger inclination Rising
Trigger type
Edge
Vertical bandwidth Full
VOLT/DIV
Adjusted according to amplitude of the signal.
UTD4000 Operating Manual
RUN/STOP : Acquire waveform continuously or stop
acquisition.
If you want the oscilloscope to acquire waveform
continuously, press [RUN/STOP] once. Press the
button again to stop acquisition. You can use this
button to switch between acquiring and stop acquiring
waveform. In the Run mode, a green light comes on
and AUTO appears on the screen. In the STOP
mode, a red light comes on and STOP appears on the
screen.
Menu Display ON/OFF: To display or hide the current
menu
With the “menu ON/OFF” key, you can display or hide
the menu currently on screen. When the menu is
hidden, a vertical yellow band will appear on the right
side of the screen
Logic Analyzer (LA) Measurement
There are 16 LA channels.
Maximum sampling rate : 250Msaps.
Storage depth : 512K.
Maximum input voltage : ±40Vpp.
Minimum voltage swing : 1.2 Vpp.
Trigger types available are : edge, pattern, duration.
The following is the LA operation menu.
Function
Function
LA Setup
Threshold
Order
Explanatory Note
LA functions ON/OFF.
See Table 2-26.
Select threshold type : TTL,
CMOS, ECL or any user
defined threshold type.
Sequence of channels
currently open, from small
to large.
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UTD4000 Operating Manual
Table 2-26
Function
LA Setup
68
Setup
Select
Move
Display
D7-D0
Next page
D15-D8
Height
Previous page
Back
Explanatory Note
Select the LA channel.
Move the selected channel.
Display or close the selected channel.
Open D7-D0 channels.
Go to the next page.
Open D15-D8 channels.
Enlarge or restore the designated channel.
Return to the previous page.
Return to the previous menu.
Caution :
To use the LA function, connect the probe of the logic
analyzer (including connector, interface box, connecting cable for the test point being measured and needle)
and insert it into the LA interface at the rear of the oscilloscope. The LA function is then activated.
When the message “LA module installation failure”
appears when the LA function is enabled, check if the
LA probe is well connected.
Figure 2-29 Composite display
of the logic analyzer and CH1
channel
UTD4000 Operating Manual
Multimeter Measurement
Operation instructions : Open the multimeter function
menu (Table 2-27) by pressing the DMM button.
Function Menu
Setup
DMM functions ON/OFF.
Functions
Mode
Explanatory Note
Voltage
Activate the voltage measurement function. Maximum
measurement value for DC voltage is 400V. Maximum
measurement value for AC voltage is 400V.
Resistance
Activate the resistance measurement function. Maximum
measurement value for resistance is 40MΩ.
On-off
Activate the on/off measurement function. When on/off
measuring is lower than 70Ω, the beeper will sound.
Diode
Current
Activate the diode measurement function.
Activate the DC current measurement function. Current
range : 4mA/40mA/400mA/4A.
Win shift
Set the horizontal shift or vertical shift of the window (with the
multifunction control knob).
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UTD4000 Operating Manual
Notes :
If it is necessary to test electric current, follow these
steps :
Insert the current/voltage converter module (UT-M03 or
UT-M04) that comes with the oscilloscope into the digital
multimeter port, and move the switch of the
current/voltage converter so that it is consistent with the
selected DMM current. Proceed with testing.
Cautions :
1.
Please select a suitable current/voltage converter
that fits the measurement range, and select an appropriate range. If you are not certain about the current being
tested, make an estimation, then select a suitable
current/voltage converter and set the range to maximum.
2.
The multimeter cannot be used to measure AC
current directly.
3.
In order to keep the accuracy of the testing, when
test heavey current with UT-M04 module,the test should
be kept less than 10 seconds at intervals of every 15
minutes.
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Chapter 3
Illustrations
Practical Example
Illustration 1 : Measuring simple signals
To observe and measure an unknown signal, and to
quickly display and measure the signal’s frequency
and peak-to-peak value.
1. To quickly display this signal, follow the steps
below :
In the probe menu, set the attenuation factor to
10X and set the switch on the probe to 10X.
Connect the CH1 probe to the circuitry to be mea
sured.
Press [AUTO].
The oscilloscope will carry out auto setup to
optimise waveform display. In this status, you can
further adjust the vertical and horizontal range until you
get the desired waveform display.
UTD4000 Operating Manual
2.
Voltage and time parameters for automatic
measurement
Your oscilloscope can automatically measure most
display signals. To measure signal frequency and
peak-to-peak value, follow the steps below :
Press [MEASURE] to display the automatic mea
surement menu.
Press [F2] to enter the measurement type selection
menu.
Use the multifunction control knob in the top left
corner of the front panel to select peak-to-peak
value, then press [SELECT] to confirm. Next use
the multifunction control knob to select frequency
then press [SELECT] to confirm.
Press [MENU ON/OFF] to exit the selection menu.
Peak-to-peak and frequency measurements will
now appear in bottom left corner of the screen.
Figure 3-1 Automatic measurement
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UTD4000 Operating Manual
Illustration 2 : Observing the delay caused by a
sine wave signal passes through the circuit
As in the previous scenario, set the probe attenuation
factor of the probe and oscilloscope channel to 10X.
Connect the CH1 to the circuit signal input terminal.
Connect CH2 to the output terminal.
Steps :
1. To display CH1 and CH2 signals :
Press [AUTO].
Continue to adjust the horizontal and vertical
range until you get the desired waveform display.
Press [CH1] to select CH1. Adjust vertical
position of the CH1 waveform by turning the vertical
position control knob.
Press [CH2] to select CH2. In the same way
described above, adjust vertical position of the CH2
waveform so that the waveforms of CH1 and CH2 do
not overlap. This will make observation easier.
72
2.
Observing the delay caused by a sine wave
signal passes through the circuit and observing
waveform changes.
When measuring channel delay automatically,
press [MEASURE] to display the automatic measurement menu. Press [F2] to enter the measurement type
selection menu. Use the multifunction control knob to
select “rising delay”. You can see the delay value in the
bottom left corner of the screen.
Observe waveform changes (see the figure
below)
Figure 3-2 Waveform delay
UTD4000 Operating Manual
Illustration 3 : Acquiring single signals
The advantage and special feature of your digital
storage oscilloscopes lie in its ability to acquire non
cyclical signals like pulse and glitch. To acquire a
single signal, you must have transcendental knowledge of that signal to set the trigger level and trigger
edge. For example, if the pulse is a logical signal of
TTL level, the trigger level should be set at about 2V
and the trigger edge should be set to rising edge
trigger. If you are not certain about the signal, you can
observe it by automatic or normal trigger to determine
the trigger level and trigger edge.
Steps :
1.
As in the previous illustration, set the attenuation factor of the probe and CH1.
2.
Carry out trigger setup.
Press [MENU] in the trigger control zone to
display the trigger setup menu.
In this menu, use [F1]~[F5] menus to set the
trigger type to edge, set trigger source to CH1, set
trigger coupling to AC, set trigger type to single and set
edge type to rising.
Adjust horizontal time base and vertical range
to an appropriate range.
Turn the TRIGGER LEVEL control knob to get
the desired level.
Press [RUN/STOP] and wait for a signal that
meets the trigger condition. If any signal reaches the
set trigger level, the system will sample once and
display it on the screen. By using this function you can
easily acquire any occasional event. For example,
when a sudden glitch of relatively big amplitude is
acquired : set the trigger level to just higher than the
normal signal level. Press [RUN/STOP] and begin
waiting. When a glitch occurs, the machine will automatically trigger and record the waveform immediately
before and after triggering. By turning the horizontal
POSITION knob in the horizontal control zone on the
front panel, you can change the trigger position
horizontally to achieve negative delay trigger of various
lengths for easy observation of waveform occurring
73
before the glitch.
UTD4000 Operating Manual
Figure 3-3 Single signal
Illustration 4 : Reducing random noise of signals
If the signal being measured is stacked with random
noise, you can adjust the setups of your oscilloscope to
filter or reduce the noise, so it will not cause interference to the signal during measurement. (Waveform is
shown below)
74
Figure 3-4 Reducing random noise of signals
Steps :
1.
As in the previous illustration, set the attenuation factor of the probe and CH1.
2. Connect the signal to ensure stable display of
waveform. See the previous illustration for operation
instruction. See the previous chapter for guidance on
UTD4000 Operating Manual
adjusting the horizontal time base and vertical range.
3. Improving trigger by setting trigger coupling.
(1) Press [MENU] in the trigger zone to display the
trigger setup menu.
(2) Set trigger coupling to low frequency suppression
or high frequency suppression. By selecting low
frequency suppression a high-pass filter is set up. It
filters low frequency signal quantities under 80kHz and
allows high frequency signal quantities to pass
through. If you select high frequency suppression a
low-pass filter is set up. It filters high frequency signal
quantities higher than 80kHz and allows low frequency
signal quantities to pass through. By setting low
frequency suppression or high frequency suppression,
you can suppress low frequency or high frequency
noise respectively and achieve a stable trigger.
4. Reducing display noise by setting the acquisition mode.
(1) If the signal being measured is stacked with
random noise and the waveform is too coarse as a
result, you can use the average acquisition mode to
eliminate random noise display and reduce the size of
waveform for easy observation and measurement. After
getting the mean, random noise is reduced and details
of the signal are clearer. Follow the steps below :
Press [ACQUIRE] in the control zone of the front panel
to display the sampling setup menu. Press [F1] then
[F3] to set acquisition mode to ADVERAGE, then turn
the multifunction control knob to adjust the average
number of times in multiples of 2, i.e. 2 to 256, until you
get the desired waveform display that meets observation and measurement requirements. (See the figure
below)
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UTD4000 Operating Manual
Illustration 5 : Using cursors for measurement
Figure 3-5 Signal noise suppressed
(2) You can also lower waveform brightness to reduce
display noise.
Caution : In the average acquisition mode the
waveform display will update at a slower rate. This
is normal.
76
Your oscilloscope can measure 27 waveform parameters automatically. All auto parameters can be measured with the cursors. By using cursors, you can
quickly measure the time and voltage of a waveform.
Measuring the frequency of Sinc first peak
To measure the Sinc frequency of the signal rising
edge, follow the steps below :
1. Press [CURSOR] to display the cursor measure
ment menu.
2. Press [F1] to activate the cursor measurement
function.
3. Press [F1] again to set cursor type to time.
4. Press [F3] to set the vertical cursor unit to Hz.
5. Turn the multi-function control knob to set cursor 1
at the Sinc first peak.
6. Press [SELECT] to select cursor 2, then turn the
multifunction control knob again to set cursor 2 at
the Sinc second peak.
UTD4000 Operating Manual
See the figure below.
Note : When using the cursor to measure voltage,
follow step 3 only and set the cursor type to
voltage.
Figure 3-6 Frequency of the
cursor measurement signal
Illustration 6 : Using the X-Y function
To check the phase difference between two channels.
Example : To measure the phase variation when a
signal passes through the circuit, connect your oscilloscope to the circuit and monitor the input and output
signals. To check the circuit’s input and output in the
X-Y coordinate mode, follow the steps below :
1. Set the attenuation factor of the probe to 10X. Set
the switch of the probe to 10X.
2. Connect the CH1 probe to the input terminal of the
network. Connect the CH2 probe to the output terminal
of the network.
3. If the channel is not displayed, press the [CH1] and
[CH2] menu button to enable the two channels.
4. Press [AUTO].
5. Adjust the vertical SCALE knob to make the
displayed amplitude of the two channels to about
equal.
6. Press the [DISPLAY] menu key to recall the display
menu.
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UTD4000 Operating Manual
7.
Press [F1] to select X-Y. The oscilloscope will
display the circuit’s input and output characteristics in a
Lissajous figure.
8.
Adjust the vertical scale and vertical position
knob to achieve the best result of waveform.
9.
Using the elliptic oscilloscope display graph to
observe, measure and calculate the phase difference.
(See the figure below)
The signal must
be in the centre
= A or C
B
D
is the angle of disparity between the channels. For
If sin
definitions of A, B, C, D see the above figure. Calculating with this formula, the angle of disparity is
= arcsin ( A ) or = arcsin ( C ).
B
D
If the elliptic main axis is within quadrants I and III, the
angle of disparity should be within quadrants I and IV,
i.e. inside (0~ 2 ) or ( 3 ~ 2 ).
2
If the main axis is within quadrants II and IV, the angle
of disparity should be within quadrants II and III, i.e.
3
inside ( 2 ~ ) or ( ~ 2 ).
Furthermore, if the frequencies and phase differences
of two signals being measured are exact multiples, you
can calculate the frequency and phase correlation
between the two signals.
Figure 3-7
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UTD4000 Operating Manual
the trigger menu.
2. Press menu operation key [F1] then [F3] to set the
type to video.
3. Press [F2] then turn the multifunction control knob
to set trigger source to CH1. Next press [SELECT] to
confirm.
4. Press [F5] then [F1] to select PAL as the video
standard.
5. Press menu operation key [F2] to select odd field or
even field synchronization.
6. Turn the SEC/DIV knob in the horizontal control
zone to adjust horizontal time base for a clear waveform display.
Illustration 7 : Video signal triggering
To observe an individual video circuit, use the video
trigger function to obtain a stable display of video
output signal.
Video field triggering
To trigger in the video field, follow the steps below :
1. Press [MENU] in the trigger control zone to display
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UTD4000 Operating Manual
4.
Press [F5] then [F1] to select PAL as the
video standard.
5.
Press [F2] then [F4] to select specified line
synchronization.
6.
Use the multifunction control knob to select
triggering on any line.
7.
Turn the horizontal SEC/DIV knob in the
horizontal control zone to adjust horizontal time base
for a clear waveform display.
Figure 3-8
Video field triggering
Video line triggering
To trigger on the video line, follow the steps below :
1.
Press trigger [MENU] button in the trigger
control zone to display the trigger menu.
2.
Press [F1] then [F3] to set the type to video.
3.
Press [F2] then turn the multifunction control
knob to set trigger source to CH1. Next press
[SELECT] to confirm.
80
Figure 3-9
Video line triggering
UTD4000 Operating Manual
Illustration 8 : Pass/fail check
To check whether the input signal is within the standard range. Fail
means outside the range and pass means within range. You can also
output the “pass/fail” signal through the output terminal.
1. Press [UTILITY] then [F3] to enter the pass/fail menu.
2. To set the signal source : Enter the pass/fail menu and press [F3] for
setup.
3. Mask setup : Press next page then [F1] to select “?” operation. Press
[F3] to enter the mask setup menu. Press [F1] to select the reference
waveform. Press [F3] then the multifunction control knob to set the
maximum horizontal capacitance, then [F4] and the multifunction control
knob to set the vertical capacitance (i.e. horizontal 1-100; vertical 1-100).
Finally press [CREATE MASK] and return to the previous menu.
4. To stop setup : press [F2] to enter the stop setup menu. Press [F1] to
select the stop type. Press [F2] to set the stop condition. Press [F3] then
turn the multifunction control knob to set the threshold.
5. Set the output condition : Press [PREVIOUS PAGE] then [F2] to set
the output condition.
6. Begin checking : Press [F1] to enable check., then press [F4] to open
the display information. (This function is disabled in dual time base and
roll operation modes)
Figure 3-10 Stop condition not satisfied
Figure 3-11 Stop condition satisfied
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UTD4000 Operating Manual
Illustration 9 : Quick acquisition
In the [ACQUIRE] menu, [F5] is the key for quick
acquisition. To observe the rapidly changes of a
waveform, activate this function. The oscilloscope will
depicts waveform strength with dark and light colour
tones.
Figure 3-13
Quick acquisition (ON)
Illustration 10 : Using the dual timebase function
Figure 3-12 Quick acquisition (OFF)
82
In the dual time base mode, you can enjoy unrivaled
detailed observation of a waveform. For example, you
can observe the colour synchronized signal of the
video signal (clear observation is impossible with
ordinary oscilloscopes).
1. To access a signal in CH1, follow the “Video signal
UTD4000 Operating Manual
trigger” instructions in “Illustration 7 : Video signal
triggering”.
2. Press [MENU] in the horizontal control zone to
display the time base setup menu.
3. Press [F3] to enter dual time base setup.
4. Press [F1] to select dual time base, then press [F2]
to select CH1. Press [F3] to set time base graticule to
M1. Adjust the M1 time base range with the SEC/DIV
knob as shown in Figure 3-14. Then press [F3] to
select M2 and adjust the M2 time base range with the
SEC/DIV knob as shown in Figure 3-14.
5. Shift the M2 time base with the multifunction
control knob to show the parts you require to observe
in detail. When shifting M2, press [F5] to choose
coarse or fine tune.
Illustration 11 : Using the Logic Analyzer
1. Setting the LA channel :
(1) Insert the LA probe into the interface at the rear of
the oscilloscope.
Figure 3-14 Dual time base function
(2) Press the LA function key to access the LA menu.
(3) Press [F1] to activate the LA function, then press
[F2] for channel setup.
(4) Press [F1] and then the multifunction control knob to
select channel. Press [F3] to open that channel, and
then press [F2] and turn the multifunction control knob
to shift that channel.
(5) Repeat step 4 until all required channels are
displayed.
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UTD4000 Operating Manual
(6) Press [F5] to go to the next page. Press [F2] to set
waveform height to “High” then press [F5] to return to the
LA menu.
The above channel selection and shifting operations
must be set with the multifunction control knob. If you have
to open more than one channels, press [F4] in the channel
setup menu to open channels D0-D7, then press [F5] to go
to the next page and press [F1] to open channels D8-D15.
In the LA menu, you can press [F5] to automatically arrange
the channels on display in sequence.
2. Using LA functions :
Set all LA channels as explained above. Input a signal
to one or several channels, then press [MENU] in the trigger
zone. Press [F1] to select trigger type to LA trigger, then
press [F2] to select sub-type. By pressing [F3], you can set
the trigger qualifier status. Press [F4] to select trigger mode
and [F5] to set the clock (When the sub-type is “pattern”) or
duration (when sub-type is “duration”). The LA can be used
concurrently with the analog channel.
84
Figure 3-15 LA channel setup
Figure 3-16 Composite display of the
logic analyzer and CH1
UTD4000 Operating Manual
Illustration 12 : Using the multimeter
The multimeter of this digital storage oscilloscope can
measure 5 parameters : voltage, resistance, on/off, diode
and DC current. The following example shows the steps for
DC current measurement :
1. Assuming the size of the current to be measured is
unknown, a current-voltage converter module of 4A range
should be used. Connect it to the multimeter port of the
oscilloscope then connect the multimeter pen.
2. Press the [DMM] key and [F1] to open the multimeter
function table. Press [F2] then [F5] to select measurement
parameter “DC current’. Press [F5] then [F4] to set current
range to “4A”.
3. Connect the multimeter pen to the circuit being tested.
4. If the signal being tested is relatively small, follow step 2
to select an appropriate current range and use a suitable
current-voltage converter module. Adjust the current range
of the current-voltage converter module so it is consistent
with that of the oscilloscope. Next follow step 3 to measure.
Figure 3-17 Selecting a large range for
measurement
Figure 3-18 Selecting a suitable range for
measurement
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UTD4000 Operating Manual
Chapter 4 — System Prompts and
Trouble-shooting
Definitions of System Prompts
Adjustment at Ultimate Limit : This informs you that
the multifunction control knob has reached its adjustment limit in the current status. No further adjust is
possible. When the vertical deflection factor knob, time
base knob, horizontal shift, vertical shift and trigger level
adjustments have reached their ultimate limits, this
prompt will appear.
USB Device Installed : After a USB device is plugged
into the oscilloscope, this prompt appears when the
connection is valid.
USB Device Unplugged : After a USB key is
unplugged from the oscilloscope, this prompt appears.
Saving : When the oscilloscope is saving a waveform,
this prompt is shown on the screen. A progress bar
appears at the bottom.
86
Waiting : This prompt appears on the screen during
auto calibration. A progress bar appears at the bottom.
I/O Failure : When USB communication fails or no
document meeting specific requirements is found on
the USB device, this prompt appears.
Function Disabled : When closing the LA function in
the LA menu, this prompt appears if the LA trigger key
in the trigger [MENU] is pressed.
Troubleshooting
1. If the screen of your oscilloscope remains black
without any display after powering on, follow the steps
below to find the cause :
Check the power cable connection and check if
there is normal power supply.
Check if the power switch is properly pressed.
Restart the unit after performing the above checks.
If the unit still fails to power on, contact UNI-T to
request service.
2. If no waveform is displayed after you have acquired
UTD4000 Operating Manual
a signal, follow the steps below to find the cause :
Check whether the probe is properly connected to
the signal lead.
Check whether the signal lead is properly
connected to the BNC (channel adaptor).
Check whether the probe is connected properly to
the object for measurement.
Check whether the object for measurement is
generating signals (connect the channel with signals
to the questionable channel to find the cause).
Restart the acquisition process.
3. The measurement voltage amplitude value is 10
times larger or smaller than the actual value : Check if
the channel attenuation factor corresponds with the
probe attenuation you have chose.
4. There is waveform display but it is not stable :
Check the trigger source setup in the trigger
menu. See whether it is the same as the actual signal
input channel.
Check the trigger type : Use edge trigger for
ordinary signals and video trigger for video signals.
Stable waveform display is achieved only when the
correct trigger mode is selected.
Try changing the coupling display to high frequency
suppression or low frequency suppression to filter any
high or low frequency noise that is interfering with
triggering.
5. No display after pressing [RUN/STOP] :
Check if the trigger mode is set to normal or single
in the menu, and whether the level exceeds the waveform range. If so, move the level to the centre or set
trigger mode to AUTO.
Press [AUTO] to complete the setup.
6. Display speed is slower after average sampling
time is enabled :
If average sampling is carried out for more than 32
times, the display speed will drop. This is normal.
You can reduce the intervals of average sampling.
7. Trapezoidal waveform display :
This is normal. The reason is possibly horizontal
time base range is too low. You can improve horizontal
pixel aspect ratio and enhance the display quality by
increasing the horizontal time base.
If the display type is vector, the connection between
sampling dots may cause a trapezoidal waveform. Set
the display type to dot to solve this problem.
87
UTD4000 Operating Manual
Chapter 5 — Service and Support
Warranty (UTD4000 Series Digital Storage Oscilloscopes)
and suitability for any specific purpose. Under no
circumstance will UNI-T bear any liability for any
indirect, special or subsequent loss.
Using the USB Upgrade Program
UNI-T (Uni-Trend Electronic (Shanghai) Limited)
warrants that product produced and marketed by it will
be free from defects in materials and workmanship for
a period of three (3) years from the date of shipment
by the authorized dealer. If any such product proves
defective during this warranty period, UNI-T will repair
the defective product or provide a replacement in
exchange according to detailed provisions of the
warranty.
To request maintenance and repair service or a full
copy of the warranty, please contact your nearest
UNI-T sales and maintenance office.
Save and except the guarantee given herein or in
other applicable warranty, UNI-T makes no other
express or implied guarantee, including but not limited
to any implied guarantee on the product’s tradability
88
The USB upgrade program makes upgrade easier
and more flexible. To use this function follow the steps
below :
1. The model name, software version and hardware
version of your oscilloscope are listed in Table 2-19.
2. The software that corresponds with the model and
hardware version of this oscilloscope, i.e the update
document, is available for download online. Save the
document on a USB device (preferably a USB device
recommended by us).
3. Power off the oscilloscope then insert the USB
device. Then power on the oscilloscope again. The
prompt “Please press [F5] to continue or [F1] to
cancel”, as shown Figure 5-1, will appear on the
screen.
UTD4000 Operating Manual
After pressing [F5], you will be prompted to select the
upgrade document, as shown in the figure below. You
can use the multifunction control knob to select the
upgrade document you require, then press [F5] to go
to the next step. (If there is only one program upgrade
document on the USB device, this prompt will not
appear and you can go straight to the next step)
Figure 5-1 USB upgrade confirmation
Figure 5-2 Selection of the USB
upgrade document
89
UTD4000 Operating Manual
4. When [F5] is presses as shown in Figure 5-2, the
following prompt will appear : Are you sure to update?
(F5=Yes,F1=No)
Figure 5-3 Confirming the USB
upgrade document
90
5. When the USB document is confirmed the following prompt will appear : “Please waitting for
update...”. (This process may take 3 to 5 minutes)
Figure 5-4 USB upgrade in progress
UTD4000 Operating Manual
6. When upgrade is complete, a successful upgrade
prompt will appear : “Congratulation,Update process
Success! Pleases pull out U-disk and reboot” The
oscilloscope program is now updated and system
upgrade is complete. In the event of upgrade failure,
follow the steps below.
Caution : If upgrade fails due to power interruption,
power off the oscilloscope and repeat all the USB
upgrade steps.
Below are some common causes for upgrade failure :
1. No upgrade document.
If there is no document with the suffix “uts”, the
following message will appear when [F5] is pressed
after powering on : “Can’t find the valid update file at
U-disk root directory! Please Sure there is update file
at U-disk’s root directory.Please pull out U-disk and
reboot”
Figure 5-5 USB upgrade success
Figure 5-6 No valid upgrade file
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UTD4000 Operating Manual
2. The user cancels the upgrade process.
(1) When the oscilloscope is restarted with the USB
device plugged in, you can cancel upgrade by pressing
[F1]. To cancel upgrade and operate your oscilloscope
normally, follow the on-screen instructions : “Please pull
out U-disk and reboot”
Figure 5-7 Cancel upgrade (1)
92
(2) During the upgrade process, you can cancel
upgrade by pressing [F1]. To cancel upgrade and
operate your oscilloscope normally, follow the onscreen instructions : “Please pull out U-disk and
reboot”
Figure 5-8 Cancel upgrade (2)
UTD4000 Operating Manual
(3) You can still cancel upgrade when the oscilloscope
is ready for the process. Simply press [F1] to return to
normal operation. Please follow the on-screen instructions : “Please pull out U-disk and reboot”
Figure 5-9 Cancel upgrade (3)
3. The USB device is removed before upgrade begins.
If the USB device is removed when the update
document is being read before commencement of
upgrade, the following prompt will appear : “U-disk has
pull out ! Please reboot” To resume normal operation,
power on the oscilloscope with the USB device
unplugged.
Figure 5-10 USB device is removed
before upgrade
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UTD4000 Operating Manual
4. Incorrect upgrade document
If the upgrade document on the USB device is
incorrect, update will fail upon selecting the upgrade
document by pressing [F5] (Figure 5-2). You will see
the prompt : “Sorry, the package format isn’t correct”.
Save a correct document on the USB device and
repeat the previous steps for upgrade.
5. Failure in reading upgrade document
After selecting the upgrade document, press [F5] to
read. If the document cannot be read, you will see the
prompt : “We are sorry for this case, please contact
with us”. It may be that our oscilloscope does not
support your USB device, or document reading is
unsuccessful due to other reasons. You can retry and
see if the problem can be solved, or use a USB device
we recommend. If the problem persists, contact our
after-sales service department. To resume normal
operation, power off your oscilloscope and then
reboot.
Figure 5-11 Incorrect upgrade document
94
Figure 5-12 Reading failure
UTD4000 Operating Manual
6. Low software version
If the version of USB document is lower than that of
the oscilloscope, upgrade will fail. You will be prompted
that, “Sorry, this package’s version is too low to
update.Please read operating manual,get system infomation in detail.” This indicates that the software version you
have saved on to the USB device is lower than the existing
one on the oscilloscope. You should acquire the correct
version either online or through our after-sales service
department. To see version information, press [UTILITY] ?
[SYSTEM CONFIGURATION] ? [SYSTEM INFORMATION]. Please download the suitable upgrade document.
Figure 5-13 Low software version
7. Software document incompatible with product
model
If the USB upgrade document is incompatible with
the oscilloscope model, upgrade will fail. You will be
prompted that, “The package’s model No.isn’t same
with this DSO.Please read operating manual,get system
infomation in detail.” You should download an
upgrade document which corresponds with your
oscilloscope model, e.g. UTD4102C, then repeat the
USB upgrade steps.
Figure 5-14 Incompatible software
document and product model
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UTD4000 Operating Manual
Contact Us
If you encounter any inconvenience in using this
product, contact Uni-Trend Electronic (Shanghai)
Limited (Uni-T, Inc.) in China directly.
Office hours : 8:00am – 5:30pm Beijing Time Monday
to Friday.
Alternatively, email us at [email protected]
For product support outside China, contact your local
UNI-T supplier or sales centre.
Service Support : Many UNI-T products offer optional
plans of extended warranty period or calibration period.
For details please contact your local UNI-T supplier or
sales centre.
A list of service centres worldwide is available online at
http://www.uni-trend.com
96
Chapter 6 — Appendixes
Appendix A : Technical Indicators
Unless otherwise specified, all technical specifications
apply to probes with a attenuation setting of 10X and
the UTD4000 Series Digital Oscilloscopes. To verify that
your oscilloscope meets specifications, it must first
meet the following conditions :
The oscilloscope must have been operating
continuously for thirty minutes within the specified
operating temperature.
If the operating temperature changes by more than
5°C, you must perform the “Self Cal” operation,
accessible through the System Functions menu. All
specifications are guaranteed unless noted “Typical”.
UTD4000 Operating Manual
Technical Indicators
Acquisition
Acquisition modes
Real time
Equivalent
Acquisition rates
2GS/s
50GS/s (UTD4302C/UTD4202C/UTD4152C)
Average
When all channels have made N acquisitions simultaneously, N is selectable
from 2, 4, 8, 16, 32, 64, 128 to 256.
Input
Input coupling
DC, AC, GND
Input impedance
1MΩ±1.5% in parallel with 24pF±3pF.
Probe attenuation factor
1X, 10X, 100X, 1000X
Maximum input voltage
400V (DC + AC Peak, 1 MΩ input impedance)
(10:1 probe attenuation); 5V (Vrms, BNC).
Time delay between channels (Typical)
150ps
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UTD4000 Operating Manual
Horizontal
Waveform interpolation
Sin (x) / x
Storage depth
24K (Max)
Equivalent storage depth (dual time base)
60M
Recording length
1024K
Scanning range (s/div)
98
1ns/div-50s/div (300MHz);
2ns/div-50s/div (200MHz, 150MHz);
5ns/div-50s/div (100MHz, 80MHz, 60MHz, 40MHz);
At 1-2-5 increment.
Accuracy of sampling
rate and delay time
±50ppm (any time interval ≥1ms)
Time interval
( T)measurement
accuracy (full bandwidth)
Single : ± (1 sampling time interval + 50ppm x reading +
0.6ns);
> 16 average values : ± (1 sampling time interval +
50ppm x reading + 0.4ns).
UTD4000 Operating Manual
Vertical
Model
A/D converter (A/D)
Deflection factor V/div Range (V/div)
(at input BNC)
Displacement range
Analog bandwidth
Single bandwidth
Selectable analog bandwidth limit (Typical)
Low frequency response (AC coupling-3dB)
Rise time (at BNC, typical)
DC gain accuracy
UTD4302C UTD4202C UTD4152C UTD4102C UTD4082C UTD4062C UTD4042C
8-bit resolution, two channels sampling simultaneously
1mV/div~10V/div(UTD4102C/UTD4082C/UTD4062C/UTD4042C)
2mV/div~5V/div(UTD4302C/UTD4202C/UTD4152C)
≥ ± 10 div (UTD4102C/UTD4082C/UTD4062C/UTD4042C)
≥ ± 5 div (UTD4302C/UTD4202C/UTD4152C)
300MHz
200MHz
150MHz
100MHz
80MHz
60MHz
40MHz
100MHz
100MHz
100MHz
100MHz
80MHz
60MH z
40MHz
20MHz
≤ 5Hz at BNC
≤5.8ns
≤8.7ns
≤1.2ns
≤1.8ns
≤2.3ns
≤3.5ns
≤4.3ns
When vertical sensitivity is 1mV/div : ±5% (sampling or average acquisition mode);
When vertical sensitivity is 2mV/div : ±4% (sampling or average acquisition mode);
When vertical sensitivity is 5mV/div~10V/div : ±3% (sampling or average acquisition mode).
DC measurement accuracy (average
acquisition mode)
When vertical position is zero and N ≥16 :
± (5% x reading + 0.1 div + 1mV) and 1mV/div is selected;
± (4% x reading + 0.1 div + 1mV) and 2mV/div or 5mV/div is selected;
± (3% x reading + 0.1 div + 1mV) and 10mV/div~10V/div is selected.
When vertical position is not zero and N ≥16 :
± (5% x(reading + vertical shift reading) + (1% x vertical shift reading)]
+ 0.2div). Set from 1mV/div to 200mV/div plus 2mV;
Setup value > 200mV/div to 10V/div plus 50mV.
Voltage difference ( V) measurement
accuracy (average acquisition mode)
Under identical setup and environmental conditions, the voltage difference
( V) between two points of the waveform after the average of ≥16
waveforms acquired waveforms is taken : ± (3% x reading + 0.05 div).
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UTD4000 Operating Manual
Trigger
Trigger sensitivity
Trigger level range
≤1 div
Internal
EXT
EXT/5
Trigger level accuracy
(Typical) applied on signals
of ≥20ns rise or fall time
Pretrigger capability
Holdoff range
Set level to 50% (Typical)
Edge Trigger
Edge type
Pulse Trigger
Trigger mode
Pulse width range
Video Trigger
Trigger sensitivity (video
trigger, typical)
100
± 8div from the centre of the screen(100MHz 80MHz 60MHz 40MHz)
± 5div from the centre of the screen (300MHz 200MHz 150MHz )
± 3V(100MHz 80MHz 60MHz 40MHz )
± 800mV(300MHz 200MHz 150MHz )
± 15V(100MHz 80MHz 60MHz 40MHz )
± 4V(300MHz 200MHz 150MHz )
Internal ± (0.3 div x V/div) (within ± 4 div from the centre of the screen)
EXT
± (6% default value + 40mV)
EXT/5
±(6% default value + 200mV)
Normal mode/scanning mode, pretrigger/delayed trigger. Pretrigger depth is
adjustable.
96.0000ns – 1.5s
Input signal frequency ≥50Hz
Rise, Fall, Rise and Fall
(Greater than, less than, or equal to) positive pulse; (Greater than, less than,
or equal to) negative pulse.
20ns – 10s
Internal
EXT
EXT/5
2 div peak-to-peak
400mV
2V
UTD4000 Operating Manual
Signal format and line/field
frequency (video trigger type)
Supports standard NTSC and PAL
Line range : 1-525 (NTSC) and 1-625 (PAL)
Alternate Trigger
CH1 Trigger
CH2 Trigger
Edge, pulse, video, slew rate, LA
Edge, pulse, video, slew rate, LA
Measurement
Cursor
Automatic measurement
Math functions
Saving waveforms
FFT
Lissajous Figure
Manual mode
Voltage difference ( V) between cursors, time
difference ( T) between cursors, T countdown
(Hz) (1/ T).
Tracking mode
Voltage and time of waveform dots.
Automatic measurement mode
Allows cursor display during automatic
measurement.
Measuring Maximum, minimum, top, bottom, mean, peak-to-peak, amplitude,
average, root mean square, cycle average, cycle root mean square, area, cycle
area, frequency, cycle, rising edge, falling edge, positive pulse, negative pulse,
burst pulse, overshoot, preshoot, rise delay, fall delay, phase, positive duty ratio,
negative duty ratio.
ˇˈˉˈhˈr
10 groups and 10 setups
Window
Acquisition points
Phase difference
Hanning, Hamming, Blackman, Rectangle
1024 points
± 3 degrees
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UTD4000 Operating Manual
LA(UTD4000CA series without this feature)
Channels
D0̚D15
Sample rate
200MS/s
Recording length
512k
Maximum input
voltage
Minmum voltage
slew
±40Vpeak
Code
Trigger
mode
1.2Vpp
D0̚D15ˈ
Trigger code˖HǃLǃXǃ
Clock edge˖RiseǃFall
D0̚D15ˈ
Trigger code˖HǃLǃX˗
Persist
condition˖˚ǃ˘ǃ˙
Persist setup˖20ns̚10s
102
'00
DC voltage
Range˖400.0mV/4.000V/40.00V/
400.0V
Accuracy˖±˄1ˁ+5 Digital˅
Range˖4.000V/40.00V/
AC voltage
400.0V
˄40Hz̚400Hz˅
Accuracy˖±˄1.2ˁ+5 Digital˅
Range˖400Ω/4kΩ/40kΩ/400kΩ
Resistance
/4MΩ/40MΩ
Accuracy˖±˄1.5ˁ+5 Digital˅
On/off
Diode
DC
current
<70.0Ω
Forward Voltage Drop 0.5V-0.8V
UT-M03 Range˖4mA/40mA/400mA
Accuracy˖±˄1ˁ+5 Digital)
UT-M04
Range:4A
Accuracy˖±˄1.5ˁ+5 Digital˅
UTD4000 Operating Manual
General Specifications
Display
Display Type
Display Resolution
Contrast (typical)
Backlight Intensity (Typical)
Display Languages
145 mm(5.7 in) diagonal LCD.
320 horizontal x RGB x 240 vertical pixels (True colour LCD).
Non-adjustable.
300 nit.
Simplified Chinese, Traditional Chinese, English.
Probe Compensator Output
Output Voltage (Typical)
about 3V into peak-to-peak at ≥ 1 MΩ load.
Frequency (Typical)
1 kHz
Interface Functions
Standard setup
Optional
1 x USB (D);
1 x USB (H);
LA interface;
multimeter interface;
Pass/fail interface.
GPIB and LAN.
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UTD4000 Operating Manual
Power Source
Source Voltage
100 - 240VACRMS, 45-440Hz, CAT II
Power Consumption
Less than 50VA.
Fuse
F1.6AL, 250V.
On the power board inside the unit.
Environmental
Temperature
Operating : 0 °C~+40 °C
Non-operating : -20 °C~+60°C
Cooling Method
Forced fan cooling.
Humidity
<+35 °C (≤ 90% RH);
+35 °C~+40 °C (≤ 60%RH).
Altitude
Operating under 3,000m.
Non-operating : under 15,000m.
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UTD4000 Operating Manual
Mechanical Specifications
UTD4000
Dimension
Weight
Width
336 mm
Height
177 mm
Depth
174mm
Unit only
3.8kg
Including package
6.5kg
IP Protection
Ip2 X
Adjust the frequency
We recommend setting a one-year frequency
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UTD4000 Operating Manual
Appendix B : Accessories for UTD4000 Oscilloscopes
Standard Accessories :
Two 1.2m, 1:1 (10:1) passive voltage probes. For details please read the probe manual. EN61010-031: 2008
standard.
Rating is 150V CAT II when the switch is in the 1X position;
Rating is 300V CAT II when the switch is in the 10X position.
One international standard power cord.
One Operating Manual.
One Product Warranty Card.
UTD4000 communication control software (USB-Device).
USB cable : UT-D06.
Two multimeter pens and two current-voltage convertor modules : UT-M03/UT-M04.
UTD4000 logic analyzer probe: UT-U01.
Optional Accessories :
10 (* EG<= 10
)
All accessories (standard and optional) are available by order at your local UNI-T dealers.
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UTD4000 Operating Manual
Appendix C : Maintenance and Cleaning
General Care
Do not store or leave the oscilloscope where the LCD display will be exposed to direct sunlight for long periods of
time.
Caution: To avoid damage to the oscilloscope or probes, do not expose them to sprays, liquids, or solvents.
Cleaning
Inspect the oscilloscope and probes as often as operating conditions require. To clean the exterior surface, perform
the following steps :
1. Remove loose dust on the outside of the oscilloscope and probes with a soft cloth. When cleaning the LCD, use
care to avoid scratching the clear protection film of the LCD.
2. Use a dampened but not dripping soft cloth to clean the oscilloscope. Remember to disconnect power. Use a
mild cleaner or water. To avoid damaging the product or probe, do not use abrasive chemical cleaner.
Warning : To avoid short circuit or personal injury due to the presence of moisture, please ensure the product is
completely dry before reconnecting power for operation.
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UTD4000 Operating Manual
Index
Numeral
50% button
Alphabet
EXT
EXT/5
FFT resolution
FFT frequency analysis
USB
X-Y mode
Y-T mode
Chinese
General check
General care
Rise time
Fall time
System prompts
Refresh rate
Single trigger
Vertical system
Grid
Acquisition
Cursor measurement
108
18
62
35
35
28
26
31
53
53
1
107
62
62
86
52
46
19
46
48
64
Display system
Forced
Horizontal system
Maths function
Measurement
Reference waveform
RUN/STOP
Storage
Trigger system
Functions
Vertical system
Return to zero
Select
Coarse tune
Nyquist frequency
Top value
Bottom value
Technical indicators
Waveform inversion
Waveform recording
Pulse trigger
Video trigger
50
18
16
25
63
29
67
53
35
56
15
16
68
20
28
62
62
96
24
58
37
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UTD4000 Operating Manual
Cleaning
Top value
Save
Warranty
Operand
Bandwidth limit
Troubleshooting
Window extension
Display system
Display type
Standard accessories
Real-time sampling
Measuring simple signals
Sec/div
Pulse width trigger
Language selection
Off
Using the RUN button
Horizontal system
Factory setup
Functional check
External trigger
107
62
54
88
26
23
86
32
50
103
106
97
70
17
37
57
16
66
31
57
11
45
Average
Average mode
Positive pulse width
Power source
Edge trigger
Alternate trigger
Cursor measurement
Tracking
Video synchronization
Field synchronization
Storage and recall
RUN button
Mechanical specifications
Automatic setup
Automatic measurement
Automatic trigger
Self calibration
Line synchronization
Negative pulse width
Root mean square value
Peak measurement
Peak-to-peak
62
50
38
104
18
43
64
43
64
43
53
62
105
70
60
46
57
64
38
62
62
62
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UTD4000 Operating Manual
Acquiring single signals
Recall
adjustment setup
Delayed measurement
Channel setup
Channel coupling
Pretrigger
Reducing signal random noise
Probe compensation
Probe attenuation rate
Sampling system
Coarse tune/fine tune
Utility functions
Maximum
Minimum
Equivalent sampling
Contact us
Math functions
Trigger level
Trigger setup
110
73
53
24
72
22
22
47
74
13
23
47
24
56
62
62
97
96
25
18
18
Trigger system
Hold off
Trigger coupling
Input channel
Interface design
Overshoot
Preshoot
Mean
Amplitude
Positive duty ratio
Negative duty ratio
18
17
46
45
57
62
62
62
62
62
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UTD4000 Operating Manual
This operating manual may be revised without prior notice.
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UTD4000 Operating Manual
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