UNI-T UTS3000T+ Series User Manual

Spectrum analyzer

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User's Manual

UTS3000B/A Series

User's Manual

UTS3000T+ Series Spectrum Analyzer

V1.0

August 2024

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Summary of Contents for UNI-T UTS3000T+ Series

Page 1 User’s Manual UTS3000B/A Series User’s Manual UTS3000T+ Series Spectrum Analyzer V1.0 August 2024 Instruments.uni-trend.com 1 / 70...
Page 2 UNI-T or an authorized UNl-T distributor. Accessories and fuses, etc. are not included in this warranty.
Page 3 Repair products that have been changed or integrated with other products (if such change or integration increases time or difficulty of repair). The warranty is formulated by UNI-T for this product, replacing any other express or implied warranties. UNI-T and its distributors refuse to give any implied warranty for marketability or applicability for special purpose.
Page 4 User’s Manual UTS3000T+ Series 1. Overview This chapter is to introduce the main functions and features of UTS3000T+ spectrum analyzer, and brief introduce the front and rear panel keys and symbols. Overview of UTS3000T+ UTS3000T+ 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.
Page 5 User’s Manual UTS3000T+ Series 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  AMPT: press this key to enable reference level function and enter amplitude setup menu ...
Page 6 User’s Manual UTS3000T+ Series 7. Gen Output 50Ω（Tracking Source）: This N- Female connector is used to as the source output of the built-in tracking generator. The input impedance is 50Ω. Warning It is forbidden to load input signals on the output port to avoid damage or abnormal function.
Page 7 User’s Manual UTS3000T+ Series  Letter in grey color with strikethrough, it presents the trace will not be update and display；  Letter in white color with strikethrough, it presents the trace is being update but no display; this case is useful for trace mathematical operation.
Page 8 User’s Manual UTS3000T+ Series Figure 1-3 Rear Panel 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 ...
Page 9 User’s Manual UTS3000T+ Series be remote control by the software on the computer. Power Switch: AC power switch, when the switch is enabled, the spectrum analyzer enters standby mode and the indicator on the front panel lights up. 8. Power Interface: Power input power.
Page 10 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 loss Warning 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 11 User’s Manual UTS3000T+ Series Safety Signs It indicates possible danger of electric shock, which may cause personal injury Danger 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 equipment if you fail to follow a certain procedure or condition.
Page 12 User’s Manual UTS3000T+ Series Conforms to UL STD 61010-1, 61010-2-030, Certified to CSA STD C22.2 No. Certification 61010-1, 61010-2-030. Do not place equipment and its accessories in the trash. Items must be properly Waste disposed of in accordance with local regulations.
Page 13 If this device may be faulty, please contact the authorized maintenance Abnormity personnel of 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 14 User’s Manual UTS3000T+ Series Environmental Requirements This instrument is suitable for the following environment: Indoor use.  Pollution degree 2  Overvoltage category: This product should be connected to a power supply that meets Overvoltage  Category II. This is a typical requirement for connecting devices via power cords and plugs.
Page 15 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 16 Use [Touch/Lock] to turn on/off touch screen function. Remote Control The UTS3000T+ 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 17 User’s Manual UTS3000T+ Series Vector signal analysis   Analog demodulation  Mode preset  Vector signal analysis, analog demodulation and EMI are the option, which should purchase to activate it. The function of the front panel button may be different in different operating modes.
Page 18 User’s Manual UTS3000T+ Series 3. Function and Application 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. Basic Measurement In this manual, key marked with [ ], such as [FREQ], [AMPT] and [Marker] are physical keys on the front panel.
Page 19 User’s Manual UTS3000T+ Series Observe Signal See the following steps to observe a simple signal. 1. Press [Default] to reset the spectrum analyzer to the factory setting. 2. Connect 10MHz OUT port on the rear panel to RF IN port on the front panel.
Page 20 User’s Manual UTS3000T+ Series In this example, the harmonic components of the 10 MHz reference signal provided on the rear panel of the spectrum analyzer are used to measure the difference in frequency and amplitude between the two signals on the same screen. Difference value△ marker is used to show the differences.
Page 21 User’s Manual UTS3000T+ Series 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;...
Page 22 User’s Manual UTS3000T+ Series Figure 3-4: Instrument Setting for Acquire Two Channel’s Signal 1. As shown in Figure 3-4, connect two signal sources to RF IN port via directional coupler. 2. Set the frequency of one of signal source to 300MHz and the frequency of another signal source to 300.1MHz, amplitude of the two signal sources to -20dBm, and turn on the signal output.
Page 23 User’s Manual UTS3000T+ Series Figure 3-6 Distinguished Two Equal-Amplitude Signal（1） 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.
Page 24 User’s Manual UTS3000T+ Series 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 Notes UTS3000T+’s filter has 4:8:1 shape factor.
Page 25 User’s Manual UTS3000T+ Series Caution RF IN port on the front panel can only withstand 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.
Page 26 User’s Manual UTS3000T+ Series Notes 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 27 User’s Manual UTS3000T+ Series lower to 1 kHz is the resolution bandwidth of digital filter, the filter’s rectangle coefficient (specific value of filter 60dB bandwidth and 3dB bandwidth) is 4.5:1. RBW greater 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.
Page 28 User’s Manual UTS3000T+ Series 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 in the annotation on the right of the screen, which includes trace, trace type and detector.
Page 29 User’s Manual UTS3000T+ Series 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...
Page 30 User’s Manual UTS3000T+ Series Figure 3-17 Component of Harmonic Distortion The reading of amplitude difference of △Mkr1 is affected by the following factors: 1. Increasing the input attenuation will deteriorate the signal-to-noise ratio, and that causes the reading of △Mkr1 to positive.
Page 31 User’s Manual UTS3000T+ Series Figure 3-18 Instrument Setting of Third-Order Intercept Signal Notes 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 32 User’s Manual UTS3000T+ Series Figure 3-19 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 33 User’s Manual UTS3000T+ Series Find File in Catalogue Tap the corresponding icon on the left of the screen to find file in the catalogue. The spectrum analyzer contains six kinds of files: State file is to save the setting information of the spectrum analyzer. The file suffix is .state.
Page 34 User’s Manual UTS3000T+ Series Delete File 1. Press >LocalDisk>UTS3000T+ 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”...
Page 35 User’s Manual UTS3000T+ Series 4. Key Function Notes Key function in this chapter is for sweep mode of the spectrum analyzer. 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.
Page 36 User’s Manual UTS3000T+ Series 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.
Page 37 User’s Manual UTS3000T+ Series Notes When the maximum mixer level and reference level are determined, the minimum of input attenuation  of the spectrum analyzer should meet the formula: Reference Level ≤ Input Attenuation- Pre-amplification -10dBm. Preamplifier: The switch that controls the internal preamplifier of the instrument. Turn on to produce a gain to compensate for the preamplifier, so that the amplitude value read out is the actual value of the input signal.
Page 38 RBW Filter Type: The UTS3000T+ 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 ...
Page 39 User’s Manual UTS3000T+ Series the signal at -65dBm. Sweep Press [Sweep] key to enter the following panel menu to select the sweep 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).
Page 40 User’s Manual UTS3000T+ Series current resolution bandwidth, in order to achieve the fastest sweeping speed. When RBW is greater than to 10kHz, sweep mode is automatically selected; when RBW is less or equal than 10kHz, FFT mode is automatically selected.
Page 41 User’s Manual UTS3000T+ Series Trace Type: Set the type of the current selected trace. The system will display the scan data after taking the corresponding calculation method according to the selected trace type. The trace types include refresh, trace averaging, maximum hold, and minimum hold. Each type has a corresponding parameter on the upper right side of the screen.
Page 42 User’s Manual UTS3000T+ Series During the sweep, the following calculation is performed for each point: Trace=10log（10 A/10 B/10 ）. In the above formula, the parameter unit is the decibel value of logarithmic power. If the value of A point is the maximum trace value, then the difference result is also the maximum trace value; If the difference result is less than or equal to 0, the result is the minimum trace value.
Page 43 User’s Manual UTS3000T+ Series Figure 4-1 Reading of Marker Cursor 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 44 User’s Manual UTS3000T+ Series Relative To: For measuring the difference between two cursors and the two cursor can be marked on the different trace at the same time. Properties: Scale selection, manual/automatic switch and mark line switch of X-axis. 1. X-Axis Scale: optional frequency, period, time, inverse time. The marker point reading changes the reading unit according to the X-axis scale.
Page 45 User’s Manual UTS3000T+ Series measured divided by the measurement bandwidth. In zero span mode, the density in-band is the measured power in-band divided by Bn (Bn refers to the noise bandwidth of the RBW filter). 4. N dB （ on /off ） : Turn on the N dB bandwidth measurement function, or set the value of N dB. N dB bandwidth refers to the frequency difference between two points where the current cursor frequency point is down (N<0) or up (N>0) of N dB amplitude to the left and right.
Page 46 User’s Manual UTS3000T+ Series Marker Table: Turn on/off marker Table When the marker Table is opened, all open cursors are displayed as a Table in the window of the split screen. The display includes cursor number, marker mode, marked trace number, X-axis scale type, X-axis reading and amplitude.
Page 47 User’s Manual UTS3000T+ Series Peak Table（On/Off）: Turn on/off peak Table, the default setting is off. Turn on peak Table, a list of peaks that meet the search parameters (display frequency and amplitude) is displayed below the split screen window. Display 20 peaks at most that meet the criteria.
Page 48 User’s Manual UTS3000T+ Series 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. Trace Selection: there are six traces for selection. Data type: trace, peak list and marker list.
Page 49 User’s Manual UTS3000T+ Series Shutdown Confirmation: after the shutdown confirmation box is selected, a confirmation dialog box will pop out. 2. Network Adapter: that is LAN switch, touch “□”to tick it, it indicates the interface is enabled. DHCP: touch “□” to tick it, it indicates automatic acquire the network configuration. If no tick it, it indicates manual setting.
Page 50 User’s Manual UTS3000T+ Series Figure 4-4 Web Basic Information Log in to check the instrument setting, to operate the instrument control, internet setting, password setting and SCPI control. Web user name and password see Utility/System Information. After logging in, user can view and control the spectrum analyzer, as shown in Figure 4-5.
Page 51 User’s Manual UTS3000T+ Series consistent with the above. Notes This instrument uses frp intranet penetration way to access outer network. frp version is 0.34.0. This machine with frp-0.34.0 client port, it need use with the server, the server needs to open frp server, the client connects to the frp server port is 7000, so the server needs to configure bind_port = 7000.
Page 52 User’s Manual UTS3000T+ Series (4) Password Setting Modify Web password of the spectrum analyzer as shown in Figure 4-7. The original password refers to physical instrument->System->Setting->Port Setting. Figure 4-7 Web Password Setting (5) SCPI Executing SCPI as shown in Figure 4-8. Input the command in edit box and click Send key, the executed result will print to the following report frame.
Page 53 User’s Manual UTS3000T+ Series 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.
Page 54 User’s Manual UTS3000T+ Series 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 55 User’s Manual UTS3000T+ Series within a signal collection unit; the average detection type will change to video detection. For random noise, logarithmic averaging = power averaging - 2.5 dB = voltage averaging - 1.45. Therefore, it reduces the displayed level of the noise (not the true level of the noise) and it is suitable for observing low-energy narrowband signals, especially those close to the noise.
Page 56 User’s Manual UTS3000T+ Series offset and Y offset to 0. Insert Row: Insert an editing point.  Delete Row: Delete the current selected.  Delete Limit: Delete the current value line, the data of the current value line will be delete.
Page 57 User’s Manual UTS3000T+ Series 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 58 User’s Manual UTS3000T+ Series 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 59 User’s Manual UTS3000T+ Series 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...
Page 60 User’s Manual UTS3000T+ Series Occupied bandwidth can be measured in single sweep mode or continuous sweep mode. User must set the center frequency, reference level and channel interval. Press [Meas] >Occupied BW 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 61 User’s Manual UTS3000T+ Series Meas Preset: Reset Meas/Setup parameters of the current measuring mode to factory setting. Third-order Intercept Figure Third-order intermodulation (TOI) measurement is used to calculate and display the output cutoff (IP3), and placed direction marker on a trace to indicate the direction of the measured signal and third-order product.
Page 62 User’s Manual UTS3000T+ Series Adjacent Channel Power Figure 5-5 Measurement of Adjacent Channel Power Measuring the main channel power, the power of previous channel and the last channel. Set a main channel and adjacent channel on the left and right side, the main channel is centered on the central frequency point, and the left and right adjacent channels are symmetric with respect to the main channel.
Page 63 User’s Manual UTS3000T+ Series voltage averaging is still a linear display. Noise BW: Set the bandwidth of the main channel. The power is integral within the bandwidth of the main channel (default value: 2MHz). User can change the carrier bandwidth by using the numeric key, rotary knob, direction key, or touch the panel menu.
Page 64 User’s Manual UTS3000T+ Series 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 User’s Manual UTS3000T+ Series 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.
Page 66 User’s Manual UTS3000T+ Series Harmonic Measurement: The amplitude of each sub-harmonic and the total harmonic distortion of the carrier signal, which can be measured up to 10 harmonics. THD is the total harmonic distortion. The harmonic analysis waveform is displayed as zero-sweep waveform of each harmonic, and all keys under the [FREQ] menu are blocked.
Page 67 User’s Manual UTS3000T+ Series 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...
Page 68 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 69 In any case, UNI-T does not bear any responsibility for indirect, special, or consequential loss. 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...
Page 70 User’s Manual UTS3000T+ Series 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 70 / 70 Instruments.uni-trend.com...

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