UNI-T UTS3000B/A Series User Manual Download Page 1

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UTS3000B/A

Series Spectrum Analyzer

User’s Manual

REV 0

2022.09

Summary of Contents for UTS3000B/A Series

Page 1: ...UTS3000B ASeries Spectrum Analyzer User s Manual REV 0 2022 09 ...

Page 2: ... Uni Trend Technology China Co Ltd UNI T products are protected by patent rights in China and other countries including issued and pending patents Uni Trend reserves the rights to any product specification and pricing changes Uni Trend Technology China Co Ltd all rights reserved Trend reserves all rights Information in this manual supersedes all previously published versions No part of this manual...

Page 3: ...ective products to the designated maintenance center of UNI T pay the shipping cost and provide a copy of the purchase receipt of the original purchaser If the products is shipped domestically to the purchase receipt of the original purchaser If the product is shipped to the location of the UNI T service center UNI T shall pay the return shipping fee If the product is sent to any other location th...

Page 4: ... UTS3000B A Overview of Front Panel User Interface Overview of Rear Panel This chapter is to introduce the main functions and features of UTS3000B A spectrum analyzer and brief introduce the front and rear panel keys and symbols ...

Page 5: ...tions and features of UTS3000B A spectrum analyzer as follows High sensitivity measurement Frequency range 9kHz 8 4GHz Display average noise level lower to 161dBm Hz Phase noise lower to 98dBc Hz 1 GHz 10 kHz offset Frequency range of tracking source 100 kHz 6 GHz Accuracy of frequency meter reach to 1Hz The minimum resolution bandwidth is 1Hz Limiting value setup of Pass fall it can determine tra...

Page 6: ... trace line demodulation mode and trace line operation Marker this maker key is to select marked number type attribute tag function and list and to control the display of these markers Peak place a marker at the amplitude peak value of signal and control this marked point to perform its function 3 Advanced Functional Key to active the advanced measurement of spectrum analyzer these function includ...

Page 7: ...0Ω this port is used to connect the external input signal the input impedance is 50Ω N Female connector Warning It is forbidden to load the input port with a signal that does not meet the rated value and ensure that the probe or other connected accessories are effectively grounded to avoid equipment damage or abnormal function RF IN port can only withstand an input signal power of no more than 30d...

Page 8: ...number of trace line color of number and trace should be the same The second line is display the corresponding trace type which includes W Clear Write A Average M Max Hold m Min Hold The third line is display detector type which including S sample P Peak p Negative N Normal A Average and f trace operation Detection types are displayed in white letters Tap screen sign to quick switch different mode...

Page 9: ...system help system and file storage Quick Screenshot screenshot will save in the default file if there has an external storage it is preferentially saved to external storage File System user can use file system to save the correction limiting value measuring result screenshot trace state or other file into internal or external storage and it can be recall System information view the basic informat...

Page 10: ...t reference source is automatically switched to the internal reference and the measuring bar on the screen will show Freq Ref In Warning It is forbidden to load the input port with a signal that does not meet the rated value and ensure that the probe or other connected accessories are effectively grounded to avoid equipment damage or abnormal function 2 10MHz Reference Output Spectrum analyzer can...

Page 11: ...effectively grounded to avoid equipment damage or abnormal function 4 HDMI Interface HDMI video signal output interface 5 LAN Interface TCP IP port for remote control connecting 6 USB Device Interface Spectrum analyzer can use this interface to connect a PC which can be remote control by the software on the computer 7 Power Switch AC power switch when the switch is enabled the spectrum analyzer en...

Page 12: ...nvironmental Requirements Connecting Power Supply Electrostatic Protection Preparation Work Usage Tip Touch Operation Remote Control Help Information Operating Mode This chapter is to introduce the safety instructions and basic information about the use of spectrum analyzer ...

Page 13: ...ailure to follow the following safety precautions This device is designed for professional users and responsible organizations for measurement purposes Do not use this device in any way not specified by the manufacturer This device is only for indoor use unless otherwise specified in the product manual Safety Statements Warning Warning indicates the presence of a hazard It reminds users to pay att...

Page 14: ... Grounding Frame and chassis grounding terminal Grounding Protective grounding terminal Grounding Measuring grounding terminal OFF Main power off ON Main power on Power Supply Standby power supply when the power switch is turned off this device is not completely disconnected from the AC power supply CAT I Secondary electrical circuit connected to wall sockets through transformers or similar equipm...

Page 15: ...ve 2002 96 EC This additional label indicates that this electrical electronic product must not be discarded in household waste EEUP This environment friendly use period EFUP mark indicates that dangerous or toxic substances will not leak or cause damage within this indicated time period The environment friendly use period of this product is 40 years during which it can be used safely Upon expirati...

Page 16: ...ower class which are definitely not applicable to main power supply measurement CAT II CAT III or CAT IV circuit measurement Use the input output port of this device properly Please use the input output ports provided by this device in a properly manner Do not load any input signal at the output port of this device Do not load any signal that does not reach the rated value at the input port of thi...

Page 17: ...e ensure adequate ventilation and leave a gap of at least 15 cm on both sides front and back of this device Safe transportation Please transport this device safely to prevent it from sliding which may damage the buttons knobs or interfaces on the instrument panel Proper ventilation Poor ventilation will cause the device temperature to rise thus causing damage to this device Please keep proper vent...

Page 18: ...ency 100 240VAC 50 60Hz 100 120VAC 400Hz Please use the attached power lead to connect to the power port Connecting to service cable This instrument is a Class I safety product The supplied power lead has good performance in terms of case ground This spectrum analyzer is equipped with a three prong power cable that meets international safety standards It provides good case grounding performance fo...

Page 19: ... after power on Usage Tip Use External Reference Signal If user want to use an external signal source 10 MHz as reference please connect signal source to the 10MHz In port on the rear panel The measuring bar on the top of the screen will indicate Freq Ref Ext Activate the Option If user want to activate the option user need to input secret key of the option Please contact UNI T office to purchase ...

Page 20: ...l and programming please refer to office site http www uni trend com UTS3000B A Series Programming Manual Help Information The spectrum analyzer s built in help system provides help information for each function button and menu control key on the front panel Touch the left of the screen help dialog box will pop out on the center of the screen Tap support function to get more detailed help descript...

Page 21: ... Signal Measurement of Frequency Shift of Signal Source Measurement of Signal Distortion Measurement of Phase Noise View Catalogue and Save File This chapter is to introduce the main function and basic measurement of spectrum analyzer Refer to Overall of Front Rear Panel for more information about the panel ...

Page 22: ...al key Touch panel menu to pop out dialog box and then touch virtual key to input numerical value and confirm select a virtual key ENTER or Enter key Enter Key If input numerical value without unit or user want to use the default unit to be the unit for this numerical value press Enter key as the termination key for this numerical value Use Panel Menu Press panel menu vertical permutation on the r...

Page 23: ...e Level and Center Frequency 1 Press AMPT 20dBm to set the reference level to 20dBm 2 Press FRQE Center Frequency 50MHz to set the center frequency to 50MHz Set Span Press FRQE Span 100MHz to set span to 100MHz Note Changing the reference level will change the amplitude value of the top grid line Changing the center frequency will change the horizontal position of the signal on the screen Increasi...

Page 24: ...nals on the same screen Difference value marker is used to show the differences 1 Reboot the spectrum analyzer Press Default to reset 2 Connect 10MHz OUT port on the rear panel to RF IN port on the front panel 3 Set the center reference span and reference level for check input signal and other harmonic wave of 10MHz Press FREQ Center Frequency 50MHz Press FREQ Span 100MHz Press AMPT Ref Level 20dB...

Page 25: ...e two signals one of the signal is displayed on the screen another signal is not on the screen Difference value marker is used to show the differences 1 Reset the spectrum analyzer Press Default Reset 2 Connect 10MHz OUT port on the rear panel to RF IN port on the front panel 3 Set the center frequency span and reference level for check input signal and other harmonic wave of 10MHz Press FREQ Cent...

Page 26: ...ows that reduce the resolution bandwidth and video bandwidth to distinguish the two signals with the same amplitude frequency space 100 kHz Please note that for resolution signal the final selected resolution bandwidth value is equal to the frequency difference between the two input signals while the video bandwidth is slightly narrower than the resolution bandwidth Figure 3 4 Instrument Setting f...

Page 27: ... Adjust the resolution bandwidth RBW to 30kHz to make its lower or equal to the frequency space of two input signal Press BW RBW 300 kHz Refer to Figure 3 6 two signal peaks can be seen at this point Use rotary knob or direction key on the front panel to further decrease the resolution bandwidth so that to better distinguish the two signals Figure 3 6 Distinguished Two Equal Amplitude Signal 1 ...

Page 28: ...e difference 50dBm 1 As shown in Figure 3 4 connect two signal sources to input port of the spectrum analyzer 2 Set the frequency and amplitude of one signal source to 300Mz 10dBm another signal source is set to 300 01MHz 60dBm and turn on signal output 3 Follow the steps to set spectrum analyzer Press Default Reset Press FREQ Center Frequency 300 MHz Span 200 kHz Press BW 30 kHz 4 Set 300MHz sign...

Page 29: ...arker Marker Mode Delta Press Marker Marker Frequency 10 kHz Figure 3 9 Distinguish Small Signal from Big Signal Note UTS3000B A s filter has 4 8 1 shape factor With a resolution bandwidth of 3 kHz its 60dB bandwidth is 14 4 kHz Half of this bandwidth 7 2 kHz is narrow than the frequency difference of two signals 10 kHz so the two input signals can be distinguished ...

Page 30: ...tand an input signal power of no more than 30dBm or a DC voltage input of 50V Otherwise it may cause damage to interior circuit 1 Press Default Reset to reset spectrum analyzer 2 Set the frequency and amplitude of signal source to 300MHz 80dBm connect RF OUT port of signal generator to RF IN port of spectrum analyzer and turn on signal output Figure 3 10 Instrument Setting for Acquire Single Signa...

Page 31: ... Small Signal with 0dB Attenuation Reduce Resolution Bandwidth Resolution bandwidth will affect internal noise level however waveform continuous signal will not affect by resolution bandwidth Reduce resolution bandwidth to 10 times ground noise will decrease 10dB accordingly 1 Refer to Reduce Input Loss in this section and follow the steps to perform it 2 Reduce the resolution bandwidth Press BW t...

Page 32: ...reater or equal to 1 kHz the filter s rectangle coefficient is 4 8 1 The maximum value of RBW is 3MHz the minimum is 1Hz Trace Averaging Trace averaging is a digital process that adds the current value of each trace point to the previous average and then took the average Select the averaging if the spectrum analyzer is automatic coupling change the detection mode to sampling mode it can make the d...

Page 33: ...reference level Press Default Reset Press FREQ Center Frequency 300MHz Span 1MHz Press AMPT Ref Level 10dBm 4 Place a marker at signal peak and turn on search continuous peak function Press Peak 5 Use the maximum hold to measure signal drift Press Trace Trace Type Max Hold When the signal is changing the maximum hold function is to remain the maximum respond of input signal Trace mode is displayed...

Page 34: ...tion to be measured on the input signal User can trace and radio frequency attenuator to identify the signal If it presents that is generated by the instrument internally In this example we use the output signal from a signal generator as a source to identify if the harmonic distortion component is generated by the spectrum analyzer 1 Connect the signal source to RF IN port of spectrum analyzer 2 ...

Page 35: ...zer display input signal at trace 2 firstly Press Trace Select Trace Trace2 Press Trace Trace Type Clear Write Press Trace Update On Press Trace Display On 8 Refresh trace 2 sweep two times at least and save the data of trace 2 After that place a marker at harmonic component of trace 2 Press Trace Update Off Press Peak Press Marker Marker Mode Delta The spectrum analyzer shows the stored waveform ...

Page 36: ...nteract with each other to produce a third intermodulation component TOI adjacent to the original signal in the spectrum These distortions are generated by system component such as the amplifier and mixer To quickly set up TOI measurement see Third Order Intercept for more details This example describes how to use a marker to measure the third order intermodulation distortion of an instrument The ...

Page 37: ...lyzer Press Default Reset Press FREQ Center Frequency 300 MHz Span 500kHz 4 Reduce the resolution bandwidth until the distortion product can be seen Press BW Rotate the Rotary Knob 5 Move signal to reference level Press Peak Marker Ref Level 6 Decrease the resolution bandwidth until the distortion can be seen Press BW Rotate the Rotary Knob 7 Activate the second marker and use next peak to move it...

Page 38: ...and normalized to 1 Hz in measurement bandwidth 1 Press Default to restore the spectrum analyzer 2 Use a cable to connect the output port of signal generator to RF IN port of the spectrum analyzer 3 Press FREQ Center frequency 1 GHz Sweep width 100 kHz 4 Press Trace Trace type Trace average Detection Average 5 Press Peak to put a marker on the peak of signal 6 Press Marker Marker mode Difference M...

Page 39: ...et range The file suffix is limit Correction file is amplitude correction for compensating the gain and loss of the external device The file suffix is corr Measuring data is to save the information of trace peak list or marker list The file suffix is csv Create New File Create a new file 1 Press LocalDisk UTS3036B to select a catalogue which need to create a file 2 Tap New folder to create a new f...

Page 40: ...file corruption Delete File 1 Press LocalDisk UTS3036B to select file or fold which need to be delete 2 Tap Delete option to delete the selected file 3 If you want to delete multiple files tap MultiSelect to tick the box in front of the file name and then tap Delete to remove multiple files Load File 1 Press LocalDisk UTS3036B to select file 2 Tap Load to loading the data of the corresponding file...

Page 41: ...T Bandwidth BW Autotune Auto Sweep Trace Marker Peak File Storage Save System Setup Default Setup Tracking Source TG Single Touch Lock Screen Meas Setup Measurement Meas Mode Note Key function in this chapter is for sweep mode of the spectrum analyzer ...

Page 42: ...ayed frequency range To determine the sweep span for each horizontal scale division the above sweep span should be divided by 10 Note Under the premise of constant sweep span to change the width sweep it will automatically modify the start and stop frequency In zero span the minimum sweep span can set to 100Hz When the sweep span is set to the maximum the spectrum analyzer enters full span mode Ch...

Page 43: ... the sweep span to a half of the current sweep span for observing the details of signal Last Span Set the sweep span as the last modified sweep span CF Step Set the stepped frequency will cause the change of center frequency start and stop frequency Use numeric key rotary knob direction key or touch panel menu to change the stepped frequency Auto Tune Quick to find the signal that is most likely t...

Page 44: ...in the vertical direction of the screen can be used When linear is selected the vertical grid becomes a linear scale with the default amplitude in volts V The grid line at the top of the screen is the set reference level while the grid line at the bottom is the zero level Each grid is a tenth of the reference level in volts V Y Axis Unit Change the amplitude unit which can be both used in logarith...

Page 45: ...also reduced In auto coupling mode the video bandwidth changes along with the resolution bandwidth thus the ratio of the resolution bandwidth and the video bandwidth stay constant If the video bandwidth and resolution bandwidth are not coupled a mark will appear in the bottom left corner of the screen next to RBW Press auto key to re couple VBW Auto Man Set the video bandwidth to filter out ambien...

Page 46: ...and trigger mode Sweep Time Auto Man Select the sweep time of display sweep span or the time used by the spectrum analyzer for the full screen scan when the sweep span is zero Decreasing the sweep time will increase the sweep frequency In manual mode user can change the sweep time value by using the numeric key rotary knob direction key or touch panel menu 1 Sweep span is not zero When the sweep t...

Page 47: ...rigger conditions are met Sweep Mode Auto Man Automatic sweep frequency and FFT mode 1 Auto The spectrum analyzer automatically selects the sweep mode or FFT mode according to the current resolution bandwidth in order to achieve the fastest sweeping speed When RBW is greater than or equal to 1kHz sweep mode is automatically selected when RBW is less than 1kHz FFT mode is automatically selected 2 S...

Page 48: ...al Input an external signal via connector TRIGGER IN on the rear panel a trigger signal is generated when the signal meets the trigger edge conditions Trigger Edge Rising Falling Set the trigger edge for external trigger to be the rising or falling edge of the pulse a trigger signal is generated when the signal meets the trigger edge conditions Trigger Delay Set trigger delay time Trace Press Trac...

Page 49: ...isplayed For every even number point on the trace line the maximum value of the sampled data will be displayed The range of amplitude variation can be observed intuitively by using normal detection 5 Average For each data point detector will take average value by sampling data in the time interval The average effect is different for different data types The average type can set by Meas Setup key U...

Page 50: ...nd store the result in the target trace During the sweep the following calculation is performed for each point Trace A offset In the above formula the unit of trace data is dBm Note Trace arithmetic functions are mutually exclusive when an arithmetic function is applied to a trace it will turn off the last selected arithmetic function Operand A Set operation trace 1 in the operation function Trace...

Page 51: ...tion 2 Delta Used to measure the difference between reference point and a point on the trace X frequency or time and Y amplitude values After selecting Difference a pair of cursors will appear on the trace the reference cursor marked with and the difference cursor marked with 3 Fixed After selecting fixed cursor set the X and Y values of the cursor directly or indirectly their positions remain unc...

Page 52: ... Axis Scale Man Auto When X axis scale is automatic the sweep span is in zero span mode and marker reading will change to Time automatically 3 Lines Off On turn on off the mark line When the mark line is turned on the crossover line is displayed at the amplitude point indicated by the cursor and the width of the horizontal line and the height of the vertical line are consistent with the length and...

Page 53: ...e marker point Marker Use the value of the current cursor to set other system parameters of the spectrum analyzer such as center frequency reference level etc If no cursor is available at the current press Marker menu to activate a cursor automatically 1 CF Set the center frequency of the spectrum analyzer to the frequency of the current cursor When Normal cursor is selected the center frequency i...

Page 54: ...er point to the reference level top of the grid When Normal cursor is selected set the marker amplitude of the spectrum analyzer to the amplitude of the current reference level When Difference cursor is selected set reference level to the amplitude difference between markers Marker Table Turn on off marker Table When the marker Table is opened all open cursors are displayed as a Table in the windo...

Page 55: ...riteria on the trace and mark it with the cursor Next PK Right Find the current peak on the right side and search the close peak that meet the search criteria on the trace and mark it with the cursor Min Pk Find the minimum amplitude value on the trace and mark by the cursor Pk Pk Search Perform peak search and minimum search at the same time the result of peak search marked with the reference cur...

Page 56: ...tary knob direction key or touch panel menu Save Press Save key to access save menu the types of files that can be saved in the instrument are state trace state measurement data limit correction and Save Long press this key to screenshot State Press State panel menu to access state save menu Save the state into the instrument 1 Press Save key the instrument will save the current state by the defau...

Page 57: ... the current limit file Correction Press Correction panel menu to access correction save menu Save the selected correction data to a file Correction Selection there are 10 correction data 1 Press Save key the instrument will save the current corrected data by the default file name or the input file name 2 After the correction file is selected press Recall key to read the current correction file Sa...

Page 58: ... of IP address is nnn nnn nnn nnn the first nnn range is 1 to 223 and the other three nnn range is 0 to 255 It is recommended to consult network administrator for an available IP address IP Mask the format of subnet mask is nnn nnn nnn nnn nnn range is 0 to 255 It is recommended to consult network administrator for an available subnet mask address Gateway the format of gateway is nnn nnn nnn nnn t...

Page 59: ...ine test is turned off but the list of limit line remains in the spectrum analyzer s memory 9 The state is directly set to 0 The default values of key parameters after reset are as follows Belongs to the Menu Parameter Name Default Value FREQ Start Freq 10MHz FREQ Stop Freq 8 4GHz biggest Freq FREQ Freq Offset 0Hz AMPT Ref Level 0dBm AMPT Attenuation Auto 10dB AMPT Preamplifier Off AMPT Ref Level ...

Page 60: ...he saving of reference trace prompt message will display on the interface When the normalization is enabled the corresponding value of the reference trace is subtracted from the data after each sweep Reference level value When the normalization is enabled adjusting reference level value to change the vertical position of trace on the screen The changing of this parameter will not affect the refere...

Page 61: ... g radar TDMA transmitter Display Line On Off Set the display line level to change the display position The display line is a reference horizontal line with an amplitude value equal to the set value and the corresponding amplitude unit is the same as the Y axis unit User can change the display line level by using the numeric key rotary knob direction key or touch the panel menu Note The display li...

Page 62: ... selected Delete Limit Delete the current value line the data of the current value line will be delete Hints Touch a point in the trace display window on the screen to edit the current data point of the limit line Or drag the point to adjust the position of the current editing point that is to change the frequency and amplitude value of the current point 7 Test Limit On Off Turn on off the current...

Page 63: ...channel bandwidth specified by the user A pair of vertical lines on the display indicate the boundary of the channel bandwidth The center frequency reference level and channel bandwidth need to be set Press Meas Channel Power to enter the following panel menu Meas Setup Avg Hold Num On Off Press average time on to specify the average number of sweep to calculating the measurement results Sweep tim...

Page 64: ...ain channel Notice that the integral bandwidth is displayed in a blue box on the screen In this case the sweep span should be set between 1 and 10 times of the integral bandwidth User can change the integral bandwidth by using the numeric key rotary knob direction key or touch the panel menu Meas Preset Reset all parameters of the current measuring mode to factory setting Time Domain Power Figure ...

Page 65: ...ction type will change to video detection Power averaging is to average the power of the signal the square of the amplitude the average detection type will change to RMS power detection Voltage averaging is to average the voltage values of the signal envelope measured in a signal collection unit the average detection type will changed to voltage detection The voltage averaging is still a linear di...

Page 66: ...he measurement results Sweep time range is from 1 to 999 User can change the average time by using the numeric key rotary knob direction key or touch the panel menu Measured average result will be displayed after the sweeping Select off to turn off this measuring average function Avg Mode Exponential Repeat Switch between exponential and repetition average mode When the specified average time of s...

Page 67: ...total power between the two markers The frequency F1 and F2 are defined as the farthest frequency of xdB which higher and lower P1 The transmission bandwidth is the difference between F2 F1 the range is from 100 0 dB to 0 1dB Users can change the xdB by using the numeric key rotary knob direction key or touch the panel menu Note The asterisk next to the xdB bandwidth value indicates that the resul...

Page 68: ...e value and then take the average In the exponential average mode the weight of the new data is larger than that of the old data which is conducive to track signals that change slowly Measured average result will be displayed after the sweeping When the repetition average mode is selected after a specified average time is reached all the previous data will be delete and restart the sweeping Meas P...

Page 69: ...restart the sweeping Avg Type Log Pwr averaging is to average the logarithmic amplitude values in dB of the signal envelope measured within a signal collection unit the average detection type will change to video detection Power averaging is to average the power of the signal the square of the amplitude the average detection type will change to RMS power detection Voltage averaging is to average t...

Page 70: ...change the average time by using the numeric key rotary knob direction key or touch the panel menu Measured average result will be displayed after the sweeping Select off to turn off this measuring average function Avg Mode Exponential Repeat Switch between exponential and repetition average mode When the specified average time of sweep is reached this average mode is used to determine the average...

Page 71: ...y offset to make no carrier signal in the noise bandwidth Calculating the power within the noise bandwidth centered on f1 frequency offset take it as noise power Divide the carrier power by the noise power the result is the carrier to noise ratio Press Meas CNR to enter the following panel menu Meas Setup Avg Hold Num On Off Press average time on to specify the average number of sweep to calculati...

Page 72: ...the carrier to be measured The carrier bandwidth is linked with sweep width noise bandwidth and frequency offset User can change the carrier bandwidth by using the numeric key rotary knob direction key or touch the panel menu Noise BW Set the bandwidth of the noise to be measured The noise bandwidth is linked with sweep width noise bandwidth and frequency offset User can change the noise bandwidth...

Page 73: ...evious data will be delete and restart the sweeping Avg Type Log Pwr averaging is to average the logarithmic amplitude values in dB of the signal envelope measured within a signal collection unit the average detection type will change to video detection Power averaging is to average the power of the signal the square of the amplitude the average detection type will change to RMS power detection Vo...

Page 74: ...Bm Attenuation 0 dB 51 dB Scale Div 0 1dB 20dB Ref Level Offset 327 6dB 327 6dB RBW 1Hz 3MHz VBW 1Hz 3MHz VBW 3dB RBW 0 000001 3000000 Sweep Time 1 ms 4 ks Points 1 40001 Trace Operation Offset 100dB 100dB Mark Frequency 0Hz 8 41GHz Mark Frequency 8 41GHz 8 41GHz Band Span 0Hz 16 82GHz Band Left 8 41GHz 8 41GHz Band Right 8 41GHz 8 41GHz N dB 140dB 0 01dB Peak Threshold 200dBm 30dBm Peak Excursion...

Page 75: ...ted and the power switch is turned on b Check whether the power supply meets the requirements c Check whether the fuse of the machine is installed or blown 2 Press the power switch if the spectrum analyzer still display blank screen and nothing is displayed a Check the fan If the fan rotates but the screen is off the cable to the screen may be loose b Check the fan If the fan does not rotate and t...

Page 76: ...lts and accuracy problems To achieve the performance listed in this manual you need a Check whether external device is properly connected and work b Have a certain understanding of the measured signal and set appropriate parameters for the instrument c Measurement should be performed under certain conditions such as preheating for a period of time after starting up specific working environment tem...

Page 77: ...e any abrasive chemical cleaning agent on the instrument or probes Warning Please confirm that the instrument is completely dry before use to avoid electrical shorts or even personal injury caused by moisture Warranty Overview UNI T UNI TREND TECHNOLOGY CHINA CO LTD ensures the production and sale of products from authorized dealer s delivery date of three years without any defects in materials an...

Page 78: ...email Our email address is infosh uni trend com cn For product support outside mainland China please contact your local UNI T distributor or sales center Many UNI T products have the option of extending the warranty and calibration period please contact your local UNI T dealer or sales center To obtain the address list of our service centers please visit our website at URL http www uni trend com ...

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