UNI-T UTS3000B/A Series User Manual
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UNI-T UTS3000B/A Series User Manual

Spectrum analyzer
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UTS3000B/A
Series Spectrum Analyzer
User's Manual
REV 0
2022.09

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Summary of Contents for UNI-T UTS3000B/A Series

  • Page 1 UTS3000B/A Series Spectrum Analyzer User’s Manual REV 0 2022.09...

  • Page 2: Copyright Information

    Copyright Information Copyright is owned by 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.

  • Page 3: Warranty Service

    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, the customer shall be responsible for all shipping, duties, taxes, and any other expenses.
  • Page 4 Overview  Overview of 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 4 / 78...
  • Page 5 Overview of UTS3000B/A UTS3000B/A is a swept spectrum analyzer with frequency range of 9kHz to 8.4GHz. It can be used as the main equipment to set up automatic control system. This instrument can also meet different test and application needs in the functional/terminal/QA test systems required in the electronics manufacturing industry.

  • Page 6: Overview Of Front Panel

    Overview of Front Panel Figure 1-1 Front Panel 1. Display Screen: display area, touch screen. 2. Measurement: the main functions to active spectrum analyzer, including：  FREQ: press this key to enable center frequency function and enter the frequency setup menu ...
  • Page 7 trace line + state, measurement data, limit, correction and export.  System: access to the system menu and set up the relevant parameters.  Default: press it to reset the setting to the default.  TG: the relevant setting of tracking source output terminal. Such as signal amplitude, amplitude offset of tracking source.

  • Page 8: User Interface

    User Interface Figure 1-2 User Interface 1. Working mode: RF analysis, vector signal analysis, EMI, analog demodulation. 2. Sweep/Measuring: Single / continuous sweep, tap the screen symbol to quick step through the mode. Measuring bar: Display the measurement information which includes input impedance, input attenuation, presetting, correction, trigger type, reference frequency, average type, and average/hold.
  • Page 9 5. Display Scale: Scale value, scale type (logarithm, linear), scale value in linear mode cannot change. 6. Reference Level: Reference level value, reference level offset value. 7. Result of Cursor Measurement: Display the current result of cursor measurement which is frequency, amplitude.

  • Page 10: Overview Of Rear Panel

    Overview of Rear Panel Figure 1-3 Rear Panel 1. 10MHz Reference Input: Spectrum analyzer can use internal reference source or as an external reference source.  If the instrument detects that the [REF IN 10MHz] connector is receiving a 10MHz clock signal from an external source, the signal is automatically used as the external reference source.
  • Page 11 Warning It is forbidden to load input signals on the output port to avoid damage or abnormal function. 3. Trigger IN: If spectrum analyzer uses an external trigger, the connector receives the rising of falling edge of an external trigger signal. The external trigger signal is feed in spectrum analyzer by BNC cable.
  • Page 12 2. User Guide  Inspect Product and Packing List  Safety Instruction  Environmental 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: Safety Instruction

    Users must follow the following conventional safety precautions in operation, service and maintenance of this device. UNI-T will not be liable for any personal safety and property Warning loss caused by the user’s failure to follow the following safety precautions. This device is designed for professional users and responsible organizations for measurement purposes.

  • Page 14: Safety Signs

    Safety Signs It indicates possible danger of electric shock, which may cause personal Danger injury or death. It indicates that you should be careful to avoid personal injury or product Warning damage. It indicates possible danger, which may cause damage to this device or other Caution equipment if you fail to follow a certain procedure or condition.

  • Page 15: Safety Requirements

    and circuit between the distribution board and the socket (three-phase distributor circuit includes a single commercial lighting circuit). Fixed equipment, such as multi-phase motor and multi-phase fuse box; lighting equipment and lines inside large buildings; machine tools and power distribution boards at industrial sites (workshops). Three-phase public power unit and outdoor power supply line equipment.
  • Page 16 (Class T, Power fuse rated current 5A, rated voltage 250V) by the maintenance personnel authorized by UNI-T. There are no components available to operators inside. Do not remove the Disassembly protective cover.
  • Page 17 If this device may be faulty, please contact the authorized maintenance personnel of Abnormity UNI-T for testing. Any maintenance, adjustment or parts replacement must be done by the relevant personnel of UNI-T. Do not block the ventilation holes at the side and back of this device;...

  • Page 18: Environmental Requirements

    Environmental Requirements This instrument is suitable for the following environment:  Indoor use.  In operating: altitude lower to 3000 meter；in non-operating: altitude lower to 15000 meter.  Operating temperature 0℃ to﹢40℃; Storage temperature -20℃ to +70℃(unless otherwise specified).  In operating, humidity temperature below to +35℃, ≤90％...

  • Page 19: Preparation Work

    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 it.

  • Page 20: Remote Control

    Use [Touch/Lock] to turn on/off touch screen function. Remote Control The UTS3000B/A series spectrum analyzers support communication with computers via USB and LAN interfaces. Through these interfaces, users can combine the corresponding programming language or NI-VISA, using the SCPI (Standard Commands for Programmable Instruments) command to remotely program and control the instrument, as well as interoperate with other programmable instruments that support the SCPI command set.

  • Page 21: Function And Application

    3. Function and Application  Basic Measurement  Measurement of Multiple Signal  Measurement of Low Level 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.

  • Page 22: Basic Measurement

    Basic Measurement In this manual, key marked with [ ], such as [FREQ], [AMPT] and [Marker] are physical keys on the front panel. In most cases, press one of this hard key to enter a function menu, this menu will display on the right of the screen, such as center frequency and reference level.
  • Page 23 Rest Spectrum Analyzer Reset is for recall preset, set the system setting return to the specified state, here are four reset types, Press [System]> Restore Defaults to select reset type. Select Setup, system setting of spectrum analyzer will return to the default. Select Data, all the saved data will be deleted.
  • Page 24 Change Reference Level 1. Press [AMPT], please note that the reference level（Ref Level）is at the activation function area. 2. Press [Marker]> Marker→> Ref Lvl Notice: Changing the reference level will change the amplitude value of the top grid line. Measurement of Multiple Signal This chapter will describe how to measure different kinds of multiple signal.
  • Page 25 Figure 3-2 Marker Mode Difference Value△ on the Same Screen to Compare Signal Note Turn on the frequency meter to increase the resolution of marker reading. Use Difference Value△ Marker on the Different Screen to Compare Signal With difference value marker function, user can easily measure the difference of amplitude and frequency between the two signals on the different screen.
  • Page 26 At this point, the first marker moves to the left side of the screen which is located at the first signal peak（10MHz）. Until the center frequency becomes 100MHz, frequency of △Mkr1 is 90MHz, which is marker 100MHz harmonic component. The annotation of △Mkr1 will show the amplitude and frequency difference of 10MHz signal peak and 100MHz signal peak.
  • Page 27 Press [Default]>Reset Press [FREQ]>Center Frequency>300MHz, Span>1MHz Press [BW]>100kHz A single envelope signal can be seen at this point. Figure 3-5 Undistinguished Two Equal-Amplitude Signals 4. 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.
  • Page 28 Figure 3-7 Distinguished Two Equal-Amplitude Signal（2） When the resolution is decreased, the sweep time will increased and the displayed signal will be smoother at the same time. For the fastest measurement, use the maximum resolution bandwidth as much as possible. In factory setting, resolution bandwidth and sweep span is coupling. Distinguish the Small Signal from the Big Signal This example shows that use a narrow resolution bandwidth to distinguish two signal with frequency difference 10 kHz, amplitude difference 50dBm.
  • Page 29 Figure 3-8: Fail to Distinguish Small Signal from Big Signal 5. Reduce the resolution bandwidth to check the hidden small signal: Press [BW]>3 kHz Press [Peak] Press [Marker]>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.
  • Page 30 Measurement of Low Level Signal This chapter will describe how to measure the low level signal and how to distinguish it from noise in the same spectrum. The main method to measure the low signal as follows. Reduce Input Loss The spectrum analyzer's ability to measure low level signal is limited by the noise it generates internally.
  • Page 31 Figure 3-11 A Signal Close to Ground Noise Note Increase attenuation value to make ground noise close to signal level. 7. Reduce attenuation to 0dB to observe signal more clearly: Press [AMPT]>Attenuation>0>dB Figure 3-12 Measuring 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.

  • Page 32: Trace Averaging

    As the noise level is reduced, the low signal level will become clearer at this point. Figure 3-13 Reduce Resolution Bandwidth Please note that there is a sign”#” at the bottom left of the screen, it presents resolution bandwidth has no coupling. It’s manual adjustment. Note User can use up/down direction key with 1-3-10 sequence to change the resolution bandwidth.
  • Page 33 Figure 3-14 Trace Averaging Track Signal Drift This chapter will describe how to measure and track signal drift. Measurement of Frequency Shift of Signal Source This spectrum analyzer can measure the stability of a signal. Use the maximum hold function to display and keep the maximum amplitude level and frequency shift of an input signal trace.
  • Page 34 Figure 3-15 Maximum Hold and Update to Observe Signal Drift Measurement of Signal Distortion This chapter will describe how to recognize and measure signal distortion. Recognize the Distortion Generated by Spectrum Analyzer A high level input signal may cause the spectrum analyzer to generate a distortion signal, and this distortion signal will mask the true distortion to be measured on the input signal.
  • Page 35 Figure 3-16 Harmonic Distortion The harmonic distortion component is generated by this signal at the input mixer of the spectrum analyzer (lined up sequentially with the original 200MHz signal at 200MHz intervals). 4. Change the center frequency to the frequency value of first harmonic: Press [Peak]>Next PK Press [Marker]>Marker→>CF 5.
  • Page 36 In the change of input attenuation, the absolute amplitude of △Mkr1 is about ≥1dB, it can be assumed that at least part of this harmonic distortion component is generated by the spectrum analyzer (as shown in Figure 3-17). The input attenuation should be adjusted up in this case. 3-17 Component of Harmonic Distortion Figure The reading of amplitude difference of △Mkr1 is affected by the following factors:...
  • Page 37 3-18 Figure Instrument Setting of Third-Order Intercept Signal Note Directional coupler must have high degree of isolation between the two inputs so that the two source signals will not cross modulate. 2. Set the frequency of a signal source (signal generator) to 299.95MHz, the frequency of the other signal source to 300.05MHz, so the frequency spacing is 100kHz.
  • Page 38 3-19 Figure Measuring Distortion Product Measurement of Phase Noise Measuring the phase noise is to measure the stability in the frequency domain. Specify the phase noise as the sideband power with respect to the output frequency of fundamental RF, measured at each offset of the carrier frequency and normalized to 1 Hz in measurement bandwidth.

  • Page 39: Create New File

    Check Catalogue and Save File The spectrum analyzer saves and acquires data in a similar way to a personal computer: both have internal memory and a USB drive. The spectrum analyzer allows you to view and save files on the internal memory or on a USB.

  • Page 40: Delete File

    Move File If you need to move file or folder from catalogue or move it from the internal memory to a USB flash drive, please refer to the following steps: 1. Press >LocalDisk>UTS3036B to select file or folder; 2. After select the file, tap “Move” on the screen, the system automatically pops up a dialog box; 3.

  • Page 41: Key Function

    4. Key Function  Frequency（FREQ）  Amplitude（AMPT）  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） ...
  • Page 42 FREQ Press [FREQ] key to activate the center frequency function and enter the frequency menu. The numerical value of center frequency, sweep span, start frequency and stop frequency are displayed at the bottom of the screen. Center Frequency: This function can set a specific frequency value at the center of the screen and respectively display the center frequency and sweep span values at the left and right side on the bottom of the screen.
  • Page 43 Freq Offset: Set a frequency offset to explain the frequency conversion between the device under test and the import of spectrum analyzer. Use numeric key, rotary knob, direction key or touch panel menu to change the frequency offset. Note  This parameter will not affect the hardware setting of spectrum analyzer, only change the display value of the center frequency, start and stop frequency.
  • Page 44 Attenuation （Auto/Man） : Set RF front-end attenuator so that signal can pass through the mixer with low distortion (small signals with low noise). Input attenuation can be switched between automatic and manual. When auto is selected, the input attenuation value is linked to the reference level. When manual is selected, the user can change the input attenuation value via the numeric key, rotary knobs, direction key or touch panel menu.
  • Page 45 4. Edit Correction: Select Provide 10 correction factors to save, the default: correction 1 Go To row Select number of revised row Insert row Add revised point Delete row Delete select row at the current Delete Correction Delete Corrected data at the current 5.
  • Page 46 RBW Filter Type: The UTS3000B/A series supports two types of filters, Gaussian and flat top window.  Gaussian window is a kind of exponential window. The main flap is wide, so the frequency resolution is low; no negative side flap, the first side flap attenuated to 55Db. Gaussian window is often used to truncate some non-periodic signals, such as exponential decay signal.
  • Page 47 Sweeping Type Rule（Normal/Accuracy）: The sweep modes are divided into common sweeping and precise sweeping. Common sweeping can get faster scanning speed, and precise sweeping is for high accuracy measurement. Sweep（Single/Cont）: Set the sweep mode to single and continuous, the default is continuous. The corresponding status at the top of the screen corresponding to the selected mode.
  • Page 48 Demod: Set the demodulation type to "AM" or "FM" or turn off the demodulation function. The default is "Off". 1. When AM (or FM) demodulation is turned on, the system will automatically turn on a cursor, locate it to the center frequency, and perform AM (or FM) demodulation for that frequency point. 2.
  • Page 49 display when a new maximum value is generated. 4. Min Hold Each point of the trace keeps displaying the minimum value in multiple sweeps, and updates the data display when a new minimum value is generated. Detector: Set the detection mode of the current measurement and apply the detection mode to the current trace.
  • Page 50 3. Power（A+B）: Calculating the power sum of operands A and B and stored it the target trace. During the sweep, the following calculation is performed for each point: ）. A/10 B/10 Trace=10log（10 In the above formula, the parameter unit is the decibel value of logarithmic power. If the value of A or B point is the maximum trace value, then the sum result is also the maximum trace value.
  • Page 51 It can display 10 markers on the screen at the time, but each time can only control one or a pair of markers. Select Marker: Select one of the ten cursors. The default is signed as marker 1. After selecting the cursor, it can set parameters such as the cursor type, the marked trace, and the reading mode.
  • Page 52 reading unit according to the X-axis scale. Frequency: When this type of reading is selected, “Normal” and “Fixed “cursor shows the absolute frequency. “Difference” cursor shows the frequency difference of difference cursor with respect to the reference cursor. In non-zero span mode, the default reading method is “Frequency”. Period: When this type of reading is selected, “Normal”...
  • Page 53 2. Band Power: In non-zero span mode, calculating the total power of the signal in a certain bandwidth. In zero span mode, calculating the average power in a certain time range. 3. Band Density: In non-zero span mode, the density in-band is the total power in the bandwidth to be measured divided by the measurement bandwidth.
  • Page 54 4. ->Stop: Set the stop frequency of the spectrum analyzer to the frequency of the cursor.  When “Normal” cursor is selected, the stop frequency is set to the frequency of the current cursor.  When “Difference” cursor is selected, the stop frequency is set to the frequency of the difference cursor.
  • Page 55 Peak Press [Peak] key to access peak search menu and perform a peak search function. Marker Frequency: The frequency point of the marker on the trace. User can change the frequency value by using the numeric key, rotary knob, direction key or touch panel menu. Marker->: [Marker] key in the panel menu “Marker->”.
  • Page 56 Figure 4-3 Peak List Search Criteria: Threshold line, peak threshold and peak offset. 1. Threshold Line （On/Off） : Set whether to display the peak threshold and peak offset indicator line. The default setting is off. 2. Threshold（Man/Auto）: Specify the minimum of peak amplitude by manual or auto. Only peak greater than the peak threshold can be judged as the peak.
  • Page 57 Measurement Data: Press Measurement Data panel menu to access measurement data save menu. The selected measurement data type (such as trace, measurement result, peak list or cursor list) can be saved into the specified file. The instrument will save the corresponding data in csv (data separated by comma) format for data analysis by using Excel software.
  • Page 58 Date/Time: touch this area to pop out the setting dialog box, swipe the numeric up and down to modify it. After the setting, touch “√” to confirm it and close the setting dialog box. Picture Format: set the format of screenshot, it has bmp and png for selection. Power On: set the system parameter settings that are loaded after power on, it has default, last and preset for selection.
  • Page 59 Default Press [Default] key to provide a convenient start environment for measurement. Press [Default]>restore to the factory setting, 1. Reset spectrum analyzer to Spectrum Analyzer (SA) mode. 2. Enter frequency menu. 3. Set the default parameter for some environment. 4. Perform processor test but not affect the correction data. 5.
  • Page 60 Press [TG] key to enter tracking source panel menu. Tracking source（on/off）: Turn on/off tracking source. After the tracking source is turned on, [TG] key indicator on the front panel will light up, and the [Gen Output 50ω] connector on the front panel will output a signal with the same frequency as the current sweep signal.
  • Page 61 Avg|Hold Number: Set the average time of trace. User can change the average time by using the numeric key, rotary knob, direction key or touch the panel menu. Multiple averaging can reduce the influence of noise or other random signals, thus highlight the stable signal characteristics in the signal. The higher the average time, the smoother the trace.
  • Page 62 6. Edit limit: Press this key to enter the edit menu and open the limit line edit window. The current limit line is turned on, the peak table is turned off, and the trace corresponding to the limit line is turned on. This menu contains as follows, ...
  • Page 63 5. One-key Measurement This chapter is to introduce how to use [Meas] key on the front panel (spectrum analysis mode). Spectrum Sweeping Press [Meas] > Swept SA There are sweep analysis (frequency domain), FFT analysis (frequency domain), or zero span analysis (time domain) for measurement.
  • Page 64 operation mode of the spectrum analyzer. When the exponential average mode is selected, after a specified average time is reached, each channel trace data is weighted exponentially, added to the previous average 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.
  • Page 65 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 operation mode of the spectrum analyzer. When the exponential average mode is selected, after a specified average time is reached, each channel trace data is weighted exponentially, added to the previous average value and then take the average.
  • Page 66 The power of the spectrum shown on the screen will be calculated at first, and two marks are placed on the spectrum. The percentage of the power between the two frequency indicated by the mark is specified by the user. The default percentage for testing is 99%.
  • Page 67 %of OBW Power: It can be used to change the percentage of signal power used in determining occupied bandwidth. User can change the percentage by using the numeric key, rotary knob, direction key, or touch the panel menu. x dB: the number of dB that defines the highest point (P1) in the signal, for measuring the transmit bandwidth, the transmit bandwidth should within the span of OBW.
  • Page 68 Press [Meas] > TOI 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 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.
  • Page 69 channel). Press [Meas] > ACP 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 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.
  • Page 70 Offset Side: Specifies which offset side to measure.NEG,Negative (lower) sideband only.POS,Positive (upper) sideband only.Both,Both of the negative (lower) and positive (upper) sidebands. Meas Preset: Reset all parameters of the current measuring mode to factory setting. Spectrum Monitor Figure Spectrum Monitoring Horizontal axis is frequency, vertical axis is time, and color presents the energy size of spectrum.
  • Page 71 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 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 display.
  • Page 72 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. 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.
  • Page 73 The harmonic analysis waveform is displayed as zero-sweep waveform of each harmonic, and all keys under the [FREQ] menu are blocked. Press [Meas] >Harmonics 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.

  • Page 74: System Prompt

    6. System Prompt and Troubleshooting System Prompt All the operating mode parameter setting are invalid, use the default value. Name Minimum Maximum Center Frequency 50Hz 8.409999950GHz Span Zero span Full span Start Freq 8.409999900GHz Stop Freq 100Hz 8.41GHz Freq Offset -100GHz 100GHz CF Step...

  • Page 75: Troubleshooting

    Troubleshooting This chapter lists the possible faults and troubleshooting methods of the spectrum analyzer. Please follow the corresponding steps to handle it, if these methods is not work, please contact UNI-T and provide your machine. Device information (acquisition method: [System] >Information) After press the power soft switch, the spectrum analyzer still display a blank screen, and nothing is displayed.
  • Page 76 Calibrate the instrument regularly to compensate for measurement errors caused by instrument aging. If you need calibrate the instrument after the guarantee calibration period. Please contact UNI-T company or obtain paid service from authorized measurement institutions. 76 / 78...

  • Page 77: Maintenance And Cleaning

    If the product is proven to be defective within this period, UNI-T will repair or replace the product in accordance with the detailed provisions of the warranty.
  • Page 78 Contact Us If the use of this product has caused any inconvenience, if you in mainland China you can contact UNI-T company directly. Service support: 8am to 5.30pm (UTC+8), Monday to Friday or via 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.

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