File : UTG-005 Date : March 20, 2009 Draft : 1 This product conforms with safety product design requirements of UL and CE standards.
Introduction Dear valued user, Thank you for purchasing a Uni-Trend instrument. To use your new product correctly, read this User Manual carefully and completely before operation and pay particular attention to “Safety Instructions”. Please keep this User Manual in a safe place after reading it carefully. For easy reference during future operation, we recommend putting it alongside your Uni-Trend product or in an easily accessible place.
UNI-T® UT4000 User Manual Copyright Information z z z Uni-Trend Technology (Dongguan) Limited. All rights reserved. Products of the Company are protected by patents granted and pending in the People’s Republic of China or other countries. The Company reserves the right to change product specifications and prices. Uni-T all rights reserved. All licensed software products are properties of Uni-Trend Technology (Dongguan) Limited and its subsidiaries or software providers.
UNI-T® UT4000 User Manual If this product is sold or assigned by the original purchaser to a third party within three years of purchase, the new owner should note that warranty is available for a period of three years from the day the original purchaser acquired the product from Uni-T or an authorized dealer. The probe, other accessories and fuses are not covered by warranty.
UT4000 User Manual UNI-T® 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.
UNI-T® UT4000 User Manual Do not operate in combustible and explosive conditions. Keep the product surface clean and dry. 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.
UNI-T® UT4000 User Manual Preface This manual provides information on the operation of the UT4000 digital storage oscilloscope series. Guidance is given in several chapters as follows : Chapter 1 ⎯ User Guide : Simple guide to oscilloscope functions and installation. Chapter 2 ⎯ Instrument Setups : Guide to operation of the UT4000 digital storage oscilloscope series. Chapter 3 ⎯ Practical Illustrations : Example illustrations are provided to solve various testing problems.
UNI-T® UT4000 User Manual UT4000 Introduction UT4000 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.
UT4000 User Manual UNI-T® UT4000 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.
UNI-T® UT4000 User Manual Table of Contents Item Page General Safety Rules Preface Chapter 1 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 Chapter 2 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
UT4000 User Manual UNI-T® Item Chapter 4 Chapter 5 Chapter 6 Index Page 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 Illustratio
UNI-T® UT4000 User Manual Chapter 1 ⎯ User Guide UT4000 Series digital storage oscilloscopes are small and compact portable devices. The user-friendly front panel enables easy operation for basic testing and measuring tasks.
UT4000 User Manual Figure 1-1 Front panel of UT4000 Oscilloscopes 2 UNI-T®
UNI-T® UT4000 User Manual Figure 1-2 Schematic diagram for operating the UT4000 front panel 3
UT4000 User Manual Figure 1-3 Schematic diagram for the display interface 4 UNI-T®
UNI-T® UT4000 User Manual General Inspection We suggest checking your new UT4000 oscilloscope in the following steps. 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.
UNI-T® UT4000 User 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 UT4000 oscilloscope has dual input channels and one external trigger input channel. Please access signals in the following steps : c 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).
UNI-T® UT4000 User Manual d 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.
UNI-T® UT4000 User Manual 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 : 1. In the CH1 menu set the probe to 10X. Move the switch on the probe to 10X and connect the probe to CH1.
UNI-T® UT4000 User Manual 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 1. Vertical controls 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.
UT4000 User Manual 2. UNI-T® 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 current status column changes accordingly.
UNI-T® 1. UT4000 User Manual 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 (UT4102C), in steps of 1-2-5. * Note : Minimum time base range of the UT4000 Series varies from model to model. 2.
UT4000 User Manual UNI-T® Getting to Know the Trigger System Trigger controls are shown in the figure below. The following steps will get you familiar with trigger setups. Figure 1-11 Trigger controls 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.
UNI-T® Figure 1-12 UT4000 User Manual 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.
UT4000 User Manual UNI-T® Chapter 2 ⎯ Instrument Setups You should be familiar with basic operation of the vertical controls, horizontal controls and trigger system menu of your UT4000 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.
UNI-T® UT4000 User Manual 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 explanatory notes please see Table 2-1 below : Table 2-1 Explanatory notes for channel menu Function Menu Setup Explanatory Note Coupling DC AC and DC quantities of input signal is allowed to pass.
UNI-T® UT4000 User 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 : AC coupling setup Figure 2-1 DC quantities of the signal are intercepted Press [F1] twice to select DC.
UNI-T® UT4000 User Manual 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) Ground coupling setup Figure 2-3 Screen display for the ground 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.
UNI-T® UT4000 User 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 : Bandwidth limit 20MHZ Bandwidth limit icon Figure 2-5 Waveform display when bandwidth limit is on 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.
UNI-T® UT4000 User 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.
UNI-T® UT4000 User Manual 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.
UNI-T® UT4000 User Manual I. Operating Math Functions Math functions are displays of +, -, ×, ÷, FFT mathematical results and digital filtering function of CH1 and CH2 waveforms. The menu is as follows : Math range Figure 2-10 Math functions Table 2-2 Explanatory notes for the Math menu Function Menu Setup Explanatory Note Type Math To carry out +, -, ×, ÷ functions. Operand 1 CH1 Set operand 1 as CH1 waveform. CH2 Set operand 1 as CH2 waveform.
UT4000 User Manual UNI-T® Table 2-3 Explanatory notes for the FFT menu Function Menu Setup Explanatory Note Type FFT To carry out FFT algorithm functions. Signal source CH1 Set CH1 as math waveform. CH2 Set CH2 as math waveform. Window function Hamming Set Hamming window function. Blackman Set Rectangle window function. Rectangle Set Blackman window function. Hanning Set Hanning window function.
UNI-T® UT4000 User Manual 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.
UNI-T® UT4000 User Manual Table 2-5 Selecting the storage position Function Menu Setup Explanatory Note Reference waveform REF A Select the REF A reference option. REF B Select the REF B reference option. Recall 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. To select an internal storage position, choose between 1 and 10.
UNI-T® UT4000 User Manual Definitions of Horizontal Parameter Icons c The signal frequency currently selected as the trigger source. d Position of the current waveform triggering point. e Trigger level of the current waveform. f The distance between the triggering position and the horizontal centre point (time). g Time base of the main time base M1, i.e. SEC/DIV.
UNI-T® UT4000 User Manual Dual Time Base Function 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.
UNI-T® UT4000 User Manual 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.
UNI-T® UT4000 User Manual Table 2-7 (Con’t) Function Menu Setup D0-D15 Explanatory Note Set one of the channels between D0-D15 as the signal source trigger signal (the LA function must be enabled). Trigger coupling DC Allow AC and DC quantities of the input signal to pass. AC Intercept DC quantities of the input signal. L/F Suppression Reject low frequency quantities below 80kHz of the signal. H/F Suppression Reject high frequency quantities above 80kHz of the signal.
UNI-T® Table 2-8 (Con’t) Function Menu Trigger mode UT4000 User Manual Setup Auto Normal Single Pulse width setup See Table 2-9 Table 2-9 Pulse width setup Pulse width Positive polarity Negative Pulse width < condition > Pulse width time = ⎯ Return ⎯ 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.
UT4000 User Manual UNI-T® 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 Figure 2-16 Video trigger : field synchronization 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.
UNI-T® Table 2-11 (Con’t) Trigger mode UT4000 User Manual Normal Single Slew rate setup Slew rate type Slew rate of the slew condition Threshold Return 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. Rise/fall setup. Set slew rate to : larger than/smaller than/equalling to with the multifunction control knob on the front panel.
UNI-T® UT4000 User Manual Adjusting the Holdoff Time 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.
UNI-T® UT4000 User Manual Definitions 1. 2. 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.
UT4000 User Manual 4. UNI-T® High Frequency Suppression : Attenuating high frequency quantities over 80kHz. 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.
UNI-T® UT4000 User Manual Press the [ACQUIRE] button to pop up the sampling setup menu. You can use this menu to adjust the sampling mode. Table 2-14 Sampling menu Function Menu Setup Explanatory Note Acquisition mode Normal sampling Turn on the ordinary sampling mode. Peak detect 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.
UT4000 User Manual UNI-T® Figure 2-20 Waveform display when 32-time average sampling is selected Definitions : Normal mode : The digital storage oscilloscope acquires signal sample at equal and regular intervals to reconstruct the waveform. 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.
UNI-T® UT4000 User Manual 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.
UT4000 User Manual UNI-T® 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 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.
UNI-T® UT4000 User 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.
UNI-T® UT4000 User Manual Table 2-16 Reference waveform storage menu Function Menu Setup Explanatory Note Type Reference waveform Select the waveform storage and recall menu. Signal source CH1 Select the waveform from CH1. CH2 Select the waveform from CH2. Storage position 1~10 With the multifunction control knob, set and select the position in which the reference waveform is to be stored in the built-in memory.
UNI-T® UT4000 User Manual 3. Select bitmap to enter the bitmap storage menu. See Table 2-18. Note : This function can be recalled and used only when the USB device is inserted. Table 2-18 Bitmap storage menu Function Menu Setup Bitmap ⎯ Export Explanatory Note Export the display data to the USB device in bmp format. Document name 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.
UNI-T® UT4000 User Manual Table 2-19 Utility functions menu (1) Function Menu Setup Explanatory Note System configuration Auto calibration Run auto system calibration. System information Display information like oscilloscope software and hardware versions. Clear information Clear all saved reference waveforms and front panel status setups. RTC setup Set time and date. Factory setup Recall factory setup. Interface setup Language Select one of the languages. Interface style Classic, traditional, modern.
UNI-T® UT4000 User Manual Table 2-21 Waveform recording menu Function Menu Setup (F4) f(F3) (F5) ⎯ Explanatory Note Stop recording 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.
UT4000 User Manual UNI-T® 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 UT4000. 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.
UNI-T® UT4000 User Manual 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.
UNI-T® UT4000 User Manual Measurement menu Operation : Press [MEASURE] to display 4 function options, as shown in the table below. Table 2-22 Function Menu All parameters Setup Customized parameters Indicator Clear measurement 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.
UNI-T® UT4000 User Manual 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. 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.
UNI-T® UT4000 User 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 Auto Setup : As shown above, Auto Setup can simplify operation.
UNI-T® UT4000 User 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.
UNI-T® UT4000 User Manual Table 2-26 Function Menu Channel setup Setup Selection Move Display D7-D0 Next page D15-D8 Waveform height Previous page Return 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.
UNI-T® UT4000 User Manual Multimeter Measurement Operation instructions : Open the multimeter function menu (Table 2-27) by pressing the DMM button. Table 2-27 DMM Menu Function Menu Setup DMM functions Measurement Voltage mode Resistance On/off Diode DC current ⎯ Window shift Explanatory Note DMM functions ON/OFF. Activate the voltage measurement function. Maximum measurement value for DC voltage is 400V. Maximum measurement value for AC voltage is 400V. Activate the resistance measurement function.
UT4000 User Manual UNI-T® Chapter 3 ⎯ Practical Example Illustrations 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 : c In the probe menu, set the attenuation factor to 10X and set the switch on the probe to 10X. d Connect the CH1 probe to the circuitry to be measured. e Press [AUTO].
UNI-T® UT4000 User 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 : c Press [AUTO]. d Continue to adjust the horizontal and vertical range until you get the desired waveform display. e Press [CH1] to select CH1.
UT4000 User Manual UNI-T® 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.
UNI-T® UT4000 User Manual 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) 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.
UT4000 User Manual UNI-T® Figure 3-5 Signal noise suppressed d 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. Illustration 5 : Using cursors for measurement 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.
UNI-T® Figure 3-6 UT4000 User Manual 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.
UNI-T® 8. 9. UT4000 User Manual Adjust the vertical scale and vertical position knob to achieve the best result of waveform. 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 Figure 3-7 If sin θ = A or C B D, θ is the angle of disparity between the channels. For definitions of A, B, C, D see the above figure.
UNI-T® UT4000 User Manual 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 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.
UT4000 User Manual UNI-T® 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. 4. Press [F5] then [F1] to select PAL as the video standard. 5. Press [F2] then [F4] to select specified line synchronization. 6.
UNI-T® UT4000 User 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. 2. 3. 4. 5. 6. Press [UTILITY] then [F3] to enter the pass/fail menu. To set the signal source : Enter the pass/fail menu and press [F3] for setup. Mask setup : Press next page then [F1] to select “” operation. Press [F3] to enter the mask setup menu.
UT4000 User Manual UNI-T® 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 3-12 Quick acquisition (OFF) Figure 3-13 Quick acquisition (ON) Illustration 10 : Using the dual time base function In the dual time base mode, you can enjoy unrivaled detailed observation of a waveform.
Figure 3-14 Dual time base function 63
UNI-T® UT4000 User Manual 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. (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.
UT4000 User Manual UNI-T® 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.
UNI-T® UT4000 User 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.
UT4000 User Manual UNI-T® 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 : c Check the trigger source setup in the trigger menu. See whether it is the same as the actual signal input channel. d Check the trigger type : Use edge trigger for ordinary signals and video trigger for video signals.
UNI-T® UT4000 User Manual Chapter 5 ⎯ Service and Support Warranty (UT4000 Series Digital Storage Oscilloscopes) 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.
UT4000 User Manual UNI-T® 3. 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 5-2 Selection of the USB upgrade document 4.
UNI-T® UT4000 User Manual 5. When the USB document is confirmed the following prompt will appear : “System upgrade is in progress. Please wait”. (This process may take 3 to 5 minutes) Figure 5-4 USB upgrade in progress 6. When upgrade is complete, a successful upgrade prompt will appear : “Upgrade is successfully complete. Please remove USB device, then power off your oscilloscope and power it back on again to complete the process.
UT4000 User Manual UNI-T® 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! Please ensure there is update file on the USB device then restart the operation.” Figure 5-6 2.
UNI-T® (2) Figure 5-8 (3) Figure 5-9 72 UT4000 User Manual During the upgrade process, you can cancel upgrade by pressing [F1]. To cancel upgrade and operate your oscilloscope normally, follow the on-screen instructions : “Remove the USB device and reboot.” Cancel upgrade (2) 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 : “Remove the USB device and reboot.
UT4000 User Manual 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 : “USB device has been removed! Please reboot.” To resume normal operation, power on the oscilloscope with the USB device unplugged. Figure 5-10 4.
UNI-T® 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 : “Sorry, upgrade has failed. Please contact our after-sales service department”. 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.
UT4000 User Manual 7. UNI-T® 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, “Software and product model incompatible. Please read the user manual for further instructions.” You should download an upgrade document which corresponds with your oscilloscope model, e.g. UT4102C, then repeat the USB upgrade steps.
UNI-T® UT4000 User Manual Chapter 6 ⎯ Appendixes Appendix A : Technical Indicators Unless otherwise specified, all technical specifications apply to probes with a attenuation setting of 10X and the UT4000 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.
UNI-T® UT4000 User Manual Horizontal Waveform interpolation Storage depth Equivalent storage depth (dual time base) Recording length Scanning range (s/div) Accuracy of sampling rate and delay time Time interval (ΔT) measurement accuracy (full bandwidth) 77 Sin (x) / x 24K (Max) 60M 1024K 1ns/div-50s/div (300MHz); 2ns/div-50s/div (200MHz, 150MHz); 5ns/div-50s/div (100MHz, 80MHz, 60MHz, 40MHz); At 1-2-5 increment. ±50ppm (any time interval ≥1ms) Single : ± (1 sampling time interval + 50ppm x reading + 0.
UNI-T® UT4000 User Manual Vertical Model UT4302C UT4202C UT4152C UT4102C UT4082C UT4062C UT4042C A/D converter (A/D) 8-bit resolution, two channels sampling simultaneously Deflection factor V/div 1 mV/div ~ 10 V/div at input BNC Range (V/div) Displacement range ≥ ± 10 div Analog bandwidth 300MHZ, 200MHz, 150MHz, 100MHz, 80MHz, 60MHz, 40MHz Single bandwidth 300MHZ, 200MHz, 150MHz, 100MHz, 80MHz, 60MHz, 40MHz Selectable analog bandwidth 20MHz limit (Typical) Low frequency response ≤ 5Hz at BNC (AC coupling,
UNI-T® UT4000 User Manual Trigger Trigger sensitivity Trigger level range ≤ 1 div Internal ± 8 div from the centre of the screen EXT ± 3V EXT/5 ± 15V Trigger level accuracy Internal ± (0.3 div x V/div) (within ± 4 (Typical) applied on signals div from the centre of the of ≥20ns rise or fall time screen) EXT ± (6% default value + 40mV) EXT/5 ±(6% default value + 200mV) Pretrigger capability Normal mode/scanning mode, pretrigger/delayed trigger. Pretrigger depth is adjustable. Holdoff range 100ns – 1.
UNI-T® UT4000 User Manual Signal format and line/field frequency Supports standard NTSC and PAL (video trigger type) Line range : 1-525 (NTSC) and 1-625 (PAL) Alternate Trigger CH1 Trigger Edge, pulse, video, slew rate, LA CH2 Trigger Edge, pulse, video, slew rate, LA Measurement Cursor Manual mode Voltage difference (ΔV) between cursors, time difference (ΔT) between cursors, ΔT countdown (Hz) (1/ΔT). Tracking mode Voltage and time of waveform dots.
UNI-T® UT4000 User Manual General Specifications Display Display Type 145 mm(5.7 in) diagonal LCD. Display Resolution 320 horizontal x RGB x 240 vertical pixels (True colour LCD). Contrast (typical) Non-adjustable. Backlight Intensity 300 nit. (Typical) Display Languages Simplified Chinese, Traditional Chinese, English. Probe Compensator Output Output Voltage about 3V into peak-to-peak at ≥ 1 MΩ load.
UNI-T® UT4000 User Manual Mechanical Specifications Dimension Width Height Depth UT4000 336 mm 177 mm 174mm Weight Unit only Including package 3.8kg 6.5kg IP Protection Ip2 X Adjust the frequency We recommend setting a one-year frequency Appendix B : Accessories for UT4000 Oscilloscopes Standard Accessories : z Two 1.5m, 1:1 (10:1) passive voltage probes. For details please read the probe manual. EN61010-031: 2002 standard.
UT4000 User Manual UNI-T® 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.
UNI-T® UT4000 User Manual Index Numeral 50% button …………………………………………………….. 13 Alphabet EXT …………………………………………………….. EXT/5 …………………………………………………….. FFT resolution ….……………………………………………… FFT frequency analysis ……..………………………………… 28 28 23 21 USB X-Y mode Y-T mode 24 39 39 …………………………………………………….. …………………………………………………….. …………………………………………………….. Chinese General check …………………………………………………… General care …………………………………………………….. Rise time …………………………………………………….. Fall time ……………………………………………………..
UNI-T® UT4000 User Manual Coarse tune ………………………………………………… Nyquist frequency …………………………………………… Top value ……………………………………………………… Bottom value …………………………………………………. Technical indicators ……………………………………… Waveform inversion ……………………………………… Waveform recording ……………………………………… Pulse trigger ………………………………………………… Video trigger ………………………………………………… Cleaning …………………………………………………….. Top value …………………………………………………….. Save …………………………………………………….. Warranty …………………………………………………….. Operand ……………………………………………………..
UNI-T® 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 ………………………………………………… Acquiring single signals ……………………………………… Recall …………………………………………………… Range adjustment …………………………………………… Dela
UT4000 User Manual This user manual may be revised without prior notice.
UNI-T® UT4000 User Manual Uni-Trend Electronic (Shanghai) Limited Address : Room 15, 11/F, China Merchants Tower, 161 Lujiazhui Dong Lu, Pudong New District, Shanghai. Tel : (86-21) 5878 3888 Fax : (86-21) 5878 7888 Email : infosh@uni-trend.com.cn Postal code : 200 120 Manufacturer : Uni-Trend Technology (Chengdu) Limited Address : 2/F, Block D2, 199 Xiqu Da Dao, Gaoxin Xiqu, Chengdu, Sichuan Province, China.
