U2020 KEYSIGHT | Alldatasheet
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Accelerate Your Production Throughput Accelerate your production throughput with Keysight Technologies, Inc. U2020 X-series USB peak and average power sensors. These sensors provide the high performance and features needed to satisfy the requirements of many power applications in R&D and manufacturing, offering a fast measurement speed of > 25,000 readings/second to reduce testing time and cut cost of test. The U2020 X-series comes with two models: U2021XA (50 MHz to 18 GHz), and U2022XA (50 MHz to 40 GHz). Get the peak power measurement capability of a power meter in a compact, portable form with the Keysight U2020 X-series USB power sensors. 02 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
The U2020 X-Series have a wide 30 MHz video bandwidth and a 80 M-sample/s continuous sampling rate for fast, accurate and repeatable RMS power measurements. With its high frequency coverage of 40 GHz, wide dynamic range and extensive measurement capability, the X-Series is optimized for aerospace/defense, wireless communication (LTE, WCDMA, GSM) and wireless networking applications (WLAN). A wide peak power dynamic range The U2020 X-series sensors’ dynamic range of –30 to +20 dBm for peak power measurements enables more accurate analysis of very small signals, across a broader range of peak power applications in the aerospace, defense and wireless industries. Internal zero and calibration Save time and reduce measurement uncertainty with the internal zero and calibration function. Each U2020 X-series sensor comes with technology that integrates a DC reference source and switching circuits into the body of the sensor so you can zero and calibrate the sensor while it is connected to a device under test. This feature removes the need for connection and disconnection from an external calibration source, speeding up testing and reducing connector wear and tear. The internal zero and calibration function is especially important in manufacturing and automated test environments where each second and each connection counts. Built-in trigger in/trigger out An external trigger enables accurate triggering of small signals close to the signal noise floor. The U2020 X-series USB power sensors come with built-in trigger in/out connection, allowing you to connect an external trigger signal from a signal source or the device-under-test directly to the USB sensor through a standard BNC to SMB cable. The sensors also come with recorder/video-output features. Compact and portable form factor The U2020 X-series are standalone sensors that operate without the need of a power meter or an external power supply. The sensors draw power from a USB port and do not need additional triggering modules to operate, making them portable and lightweight solutions for field applications such as base station testing. Simply plug the sensor to the USB port of your PC or laptop, and start your power measurements. Fast rise and fall time; wide video bandwidth Accurately measure the output power and timing parameters of pulses when designing or manufacturing components and subcomponents for radar systems. The U2020 X-series USB power sensors come with a 30 MHz bandwidth and ≤ 13 ns rise and fall time, providing a high performance peak and average power solution that covers most high frequency test applications up to 40 GHz. Built-in radar and wireless presets Begin testing faster; the U2020 X-series USB power sensors come with built-in radar and wireless presets for DME, GSM, EDGE, CDMA, WCDMA, WLAN, WiMAX™, and LTE. 03 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Bundled intuitive power analysis software The U2020 X-series USB power sensors are bundled with a free N1918A Option 100 Power Analyzer PC license key. Simply connect the USB power sensor and the PC will recognize the license. A N1918A Power Analysis Manager software CD will be shipped together with the U2021XA or U2022XA. Users can also download the software from www.keysight.com/find/N1918A . The U2020 X-Series is supported by the Keysight BenchVue software (version 2.5 and above). BenchVue makes it easy to control your power meter to log data and visualize measurements in a wide array of display options without any programming. This software is available on the Keysight Instrument Control DVD, which is included with each sensor. You can download the latest version of the software cost free at www.keysight.com/find/BenchVue. Upgrading to the paid BenchVue Power Meter Pro version (BV0007A) provides unrestricted data logging. Keysight recommends that you use the BenchVue software for new projects or applications. Complementary cumulative distribution function (CCDF) curves CCDF characterizes the high power statistics of a digitally modulated signal, and is defined by how much time the waveform spends at or above a given power level. The U2020 X-series supports two types of CCDF curves. Normal CCDF displays the power statistics of the whole waveform under free run, internal or external trigger modes. Gated CCDF can be coupled with a measurement gate and only the waveform within the gated region is analyzed statistically. Gated CCDF is only applicable in internal trigger and external trigger modes. Designers of components, such as power amplifiers, will compare the CCDF curves of a signal at the amplifier’s input and output. A well designed component will produce curves that overlap each other. If the amplifier compresses the signal, then the peak-to-average ratio of the signal will be lower at the output of the amplifier. The designer will need to improve the range of the amplifier to handle high peak power. 04 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
features
List mode is a mode of operation where a predefined sequence of measurement steps can be programmed into the power sensor and repeatedly executed as many times as required. This mode is suitable for power and frequency sweeps which normally require changing the parameters via the appropriate SCPI commands before performing a measurement. The hardware handshaking communication between the power sensor and the signal source provides the fastest possible execution time in performing the test sequences. List mode enables users to setup the number of measurements, the number and duration of timeslots, the start and stop frequency for sweeping and the exclusion interval. This is especially useful for speeding up measurements for eight time-slotted GSM/EDGE bursts, LTE-TDD or WLAN frames and sub-frames. For more information, please refer to the programming examples in the U2020 X-Series Programming Guide. Variable aperture size In average only mode and at normal measurement speed, the time interval length used to measure the average power of the signal can be adjusted by setting the aperture size to between 125 µs and 200 ms. This is useful for CW signals and noise-like modulated signals such as LTE-FDD and WCDMA by performing measurements over the full frames or sub-frames. Decreasing the aperture size will improve the measurement throughput but reduce the signal-to-noise ratio of the measured signal. However, increasing the aperture size will improve the signal-to-noise ratio of the measured signal but reduce the measurement throughput. Table 1. Aperture size it comes without trace display. burst to the center of the trace display. highly accurate power measurements.
Performance Specifications Specification definitions There are two types of product specifications: – Warranted specifications are specifications which are covered by the product warranty and apply over a range of 0 to 55 °C unless otherwise noted. Warranted specifications include measurement uncertainty calculated with a 95% confidence – Characteristic specifications are specifications that are not warranted. They describe product performance that is useful in the application of the product. These characteristic specifications are shown in italics. Characteristic information is representative of the product. In many cases, it may also U2020 X-Series USB Power Sensors Specifications Key specifications Frequency range U2021XA 50 MHz to 18 GHz U2022XA 50 MHz to 40 GHz Dynamic power range Normal mode –35 dBm to 20 dBm (≥ 500 MHz) –30 dBm to 20 dBm (50 MHz to 500 MHz) Average only mode 1,2 –45 dBm to 20 dBm Damage level 23 dBm (average power) 30 dBm (< 1 μs duration) (peak power) Rise/fall time ≤ 13 ns 3 Maximum sampling rate 80 Msamples/sec, continuous sampling Video bandwidth ≥ 30 MHz Single-shot bandwidth ≥ 30 MHz Minimum pulse width 50 ns 4 Average power measurement accuracy U2021XA ≤ ± 0.2 dB or ± 4.5% 5 U2022XA ≤ ± 0.3 dB or ± 6.7% Maximum capture length 1 s (decimated) 1.2 ms (at full sampling rate) Maximum pulse repetition rate 10 MHz (based on 8 samples/period) Connector type U2021XA N-type (m) U2022XA 2.4 mm (m) 1. Internal zeroing, trigger output, and video output are disabled in average only mode. 2. It is advisable to perform zeroing when using the average path for the first time after power on, significant temperature changes, or long periods since the last zeroing. Ensure that the power sensor is isolated from the RF source when performing external zeroing in average only mode. 3. For frequencies ≥ 500 MHz. Only applicable when the Off video bandwidth is selected. Add 5 ns to rise/fall time specifications for acquisitions smaller than 137.5 µs. 4. The Minimum Pulse Width is the recommended minimum pulse width viewable, where power measurements are meaningful and accurate, but not warranted. 5. Specification is valid over a range of –15 to +20 dBm, and a frequency range of 0.5 to 10 GHz, DUT Max. SWR < 1.27 for the U2021XA, and a be supplemental to a warranted specifica - tion. Characteristics specifications are not verified on all units. There are several types of characteristic specifications. They can be divided into two groups: One group of characteristic types describes ‘attributes’ common to all products of a given model or option. Examples of characteristics that describe ‘attributes’ are the product weight and ’50-Ω input Type-N connector’. In these examples, product weight is an ‘approximate’ value and a 50-Ω input is ‘nominal’. These two terms are most widely used when describing a product’s ‘attributes.’ The second group describes \statistically’ the aggregate performance of the population of products. These characteristics describe the expected behavior of the population of products. They do not guarantee the performance of any individual product. No measurement uncertainty value is accounted for in the specification. These specifications are referred to as \typical.’ Conditions The power sensor will meet its specifica - tions when: – Stored for a minimum of two hours at a stable temperature within the operating temperature range, and turned on for at least 30 minutes – The power sensor is within its recom - mended calibration period, and – Used in accordance to the information provided in the User’s Guide. 06 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
a signal with a known rise time of 13 ns. Figure 1. Measured rise time percentage error versus signal under test rise time
- Specified as 10% to 90% for rise time and 90% to 10% for fall time on a 0 dBm pulse.
- Specified as the overshoot relative to the settled pulse top power. Applicable to signal with rise time ≥ 15 ns
- Add 5 ns to rise/fall time specifications for acquisitions smaller than 137.5 µs.
optimal flatness (except the Off filter).
Figure 2. U2021XA/22XA error in peak-to-average measurements for a two-tone input For average only mode with aperture size of <12 ms and averaging set to 1, the measurement noise is equal to 50 nW.
- Within 1 hour after zeroing, at a constant temperature, after a 24-hour warm-up of the U2020 X-Series. This component can be disregarded with the
auto-zeroing mode set to ON.
- Measured over a 1-minute interval, at NORMal speed, at a constant temperature, two standard deviations, with averaging set to 1.
- Tested with averaging set to 16 at NORMal speed and 32 at DOUBLE speed.
The noise per sample is reduced by applying the video bandwidth filter setting (High, Medium, or Low). If averaging is implemented, this will dominate any effect of changing the video bandwidth. Effect of Time-Gating on Measurement Noise The measurement noise for a gated average measurement is calculated from the noise per sample specification. The noise for any particular gate is equal to N sample /√(gate length/12.5 ns). The improvement in noise limits at the measurement noise specification of 100 nW. Maximum SWR Frequency band U2021XA U2022XA 50 MHz to 10 GHz 1.2 1.2 > 10 GHz to 18 GHz 1.26 1.26 > 18 GHz to 26.5 GHz 1.3 > 26.5 GHz to 40 GHz 1.5 Calibration Uncertainty Definition: Uncertainty resulting from non-linearity in the U2021XA/22XA detection and correction process. This can be considered as a combination of traditional linearity, calibration factor and temperature specifications and the uncertainty associated with the internal calibration process. Frequency band U2021XA U2022XA 50 MHz to 500 MHz 4.2% 4.3% > 500 MHz to 1 GHz 4.0% 4.2% > 1 GHz to 10 GHz 4.0% 4.5% > 10 GHz to 18 GHz 4.5% 4.5% > 18 GHz to 26.5 GHz 5.3% > 26.5 GHz to 40 GHz 5.8% 09 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Timebase and Trigger Specifications Timebase Range 2 ns to 100 ms/div Accuracy ± 25 ppm Jitter ≤ 1 ns Trigger Internal trigger Range –20 to 20 dBm Resolution 0.1 dB Level accuracy ± 0.5 dB Latency 1 300 ns ± 12.5 ns Jitter ≤ 5 ns RMS External TTL trigger input High > 2.4 V Low < 0.7 V Latency 2 212.5 ns ± 12.5 ns Minimum trigger pulse width 15 ns Minimum trigger repetition period 50 ns Maximum trigger voltage input 5 V EMF from 50 Ω DC (current < 100 mA), or
5 V EMF from 50 Ω (pulse width < 1 s, current < 100 mA)
Impedance 50 Ω, 100 kΩ (default) Jitter ≤ 0.5 ns RMS External TTL trigger output Low to high transition on trigger event High > 2.4 V Low < 0.7 V Latency 3 50 ns ± 12.5 ns Impedance 50 Ω Jitter ≤ 5 ns RMS Trigger delay Range ± 1.0 s, maximum Resolution 1% of delay setting, 12.5 ns minimum Trigger holdoff Range 1 μs to 400 ms Resolution 1% of selected value (to a minimum of 12.5 ns) Trigger level threshold hysteresis Range ± 3 dB Resolution 0.05 dB 1. Internal trigger latency is defined as the delay between the applied RF crossing the trigger level and the U2021XA/22XA switching into the triggered state. 2. External trigger latency is defined as the delay between the applied trigger crossing the trigger level and the U2021XA/22XA switching into the triggered state. 3. External trigger output latency is defined as the delay between the U2021XA/22XA entering the triggered state and the output signal switching. 10 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Current requirement 450 mA max (approximately) Recorder output Analog 0 to 1 V, 1 kΩ output impedance, SMB connector Video output 0 to 1 V, 50 Ω output impedance, SMB connector Trigger input Input has TTL compatible logic levels and uses a SMB connector Trigger output Output provides TTL compatible logic levels and uses a SMB connector Remote programming Interface USB 2.0 interface USB-TMC compliance Command language SCPI standard interface commands, IVI-COM, IVI-C driver and LabVIEW drivers Maximum measurement speed Free run trigger measurement 25,000 readings per second 1 External trigger time-gated measurement 20,000 readings per second 2 1. Tested under normal mode and fast mode, with buffer mode trigger count of 100, output in binary format, unit in watt, auto-zeroing, auto-calibration, and step detect disabled. 2. Tested under normal mode and fast mode, with buffer mode trigger count of 100, pulsed signal with PRF of 20 kHz, and pulse width at 15 µs. Environmental Compliance Temperature Operating condition: –0 °C to 55 °C Storage condition: –40 °C to 70 °C Humidity Operating condition: Maximum: 95% at 40 °C (non-condensing) Storage condition: Up to 90% at 65°C (non-condensing) Altitude Operating condition: Up to 3000 m (9840 ft) Storage condition: Up to 15420 m (50000 ft) Regulatory compliance The U2021XA/22XA USB peak power sensor complies with the following safety and EMC requirements: – IEC 61010-1:2001/EN 61010-1:2001 (2nd edition) – IEC 61326:2002/EN 61326:1997 +A1:1998 +A2:2001 +A3:2003 – Canada: ICES-001:2004 – Australia/New Zealand: AS/NZS CISPR11:2004 – South Korea EMC (KC Mark) certification: RRA 2011-17 Dimensions (Length × Width × Height) 140 mm × 45 mm × 35 mm Weight Net weight: ≤ 0.25 kg Shipping weight: 1.4 kg Connectivity USB 2.0, with the following cable lengths: (Selectable during sensor purchase) – Option 301: 1.5 m – Option 302: 3 m – Option 303: 5 m Recommended calibration interval 1 year Warranty 3 years 11 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
N1918A Power Analysis Manager functions Measurement displays Compact mode display Soft panel (digital) display (enhanced with limits and alerts notifications) Gauge (analog) display (enhanced with limits and alerts notifications) Strip chart display Trace graph display Multiple tabs Multiple display per tab Multilist Graph functions Single marker (up to 10 markers per graph) Dual marker (up to 5 sets of markers per graph) Graph autoscaling Graph zooming Measurement math; delta, ratio Save/Load file functions Save measurement data with timestamp (applicable in Strip Chart and Trace Graph) Load measurement data (applicable in Strip Chart and Trace Graph) Data recording 1 with timestamp (applicable in Trace Graph 1, Soft Panel, Strip Chart and Gauge) Instrument settings options Save and restore instrument setting Time-gated measurements Instrument preset settings FDO table parameters Measurement limit and alert functions Limit and alert notification Alert summary Support function Print application screen 1. Recording time for trace graphs may vary based on trace graph settings. Using the U2020 X-Series with the N1918A Power Analysis Manager N1918A Power Analysis Manager is a powerful application software that complements the U2020 X-series and U2000 series USB power sensors, offering easy monitoring and analysis on a PC display. The U2021XA and U2022XA each come with a free N1918A option 100 Power Analyzer PC license. The license will be recognized once the U2021XA or U2022XA is connected to a PC. A N1918A Power Analysis Manager software CD will be shipped together with the USB power sensor. Users can also download the software from www.keysight.com/find/ N1918A. The following tables show the available N1918A functions: 12 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Display units Absolute: Watts or dBm Relative: Percent or dB Display resolution Resolution of 1.0, 0.1, 0.01 and 0.001 dB in log mode; one to four digits in linear mode Default resolution 0.01 dB in log mode; three digits in linear mode Zero For performing internal and external zeroing Range Sensor-dependent, configurable in 1-kHz steps Relative Displays all successive measurements relative to the last referenced value Offset Allows power measurements to be offset by –100 dB to +100 dB, configurable in 0.001 dB increments, to compensate for external loss or gain Limits High and low limits can be set in the range between –150.00 dBm to +230.00 dBm, in 0.001 dBm increments Preset default values Channel Offset (dB) = 0, Duty Cycle Off, Frequency 50 MHz, AUTO Average, AUTO Range, Free Run Mode, dBm mode System Requirements Hardware Processor Desktop PC: 1.3 GHz Pentium IV or higher recommended Laptop PC: 900 MHz Pentium M or higher recommended RAM 512 MB (1.0 GB or higher recommended) Hard disk space 1.0 GB or more free disk space at runtime Resolution 800 x 600 or higher (1280 x 1024 recommended) Operating system Operating system Windows 8 32-bit and 64-bit Windows 7 32-bit and 64-bit Windows Vista 32-bit and 64-bit Windows XP Professional 32-bit Service Pack 2 or higher Software Keysight IO Libraries Suite Version 15.5 1 or higher Microsoft .NET Framework Runtime version 3.5 Microsoft Visual C++ 2005 Runtime Libraries 2 Version 1.0 or higher 1. Available on the Keysight Automation-Ready CD-ROM. Keysight IO Libraries Suite 15.5 is required if your PC is running on Windows Vista 32-bit operating system. 2. Bundled with N1918A Power Analysis Manager CD 13 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Figure 3. Digital meter, analog meter and datalog view settings, zero and calibration, etc.
System and Installation Requirements PC operating system Windows 8 and 7 Windows 8 32-bit and 64-bit (Core, Professional, Enterprise) Windows 7 SP1 and later 32-bit and 64-bit (Professional, Enterprise, Ultimate) Computer hardware Professor: 1 GHz or faster (2 GHz or greater recommended) RAM: 1 GB (32-bit) or 2 GB (64-bit) (3 GB or greater recommended) Windows XP SP3 32-bit (Professional) Processor: 600 MHz or faster (1 GHz or greater recommended) RAM: 1 GB (2 GB or greater recommended) Interfaces USB, GPIB, LAN, RS-232 Display resolution 1024 x 768 minimum for single instrument view (higher resolutions are recommended for multiple instrument view) Additional requirements Software: BenchVue requires a VISA (Keysight or National Instruments) when used to connect to physical instruments. Keysight IO Libraries, which contains the necessary VISA, will be installed automatically when BenchVue is installed. IO Libraries information is available at: www.keysight.com/find/iosuite 15 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Uncertainty calculations for a power measurement (settled, average power) (Specification values from this document are in bold italic, values calculated on this page are underlined.) Process 3. Calculate sensor uncertainty: Calculate noise contribution – If in Free Run mode, Noise = Measurement noise x free run multiplier – If in Trigger mode, Noise = Noise-per-sample x noise per sample multiplier 4. Zero uncertainty 5. Sensor calibration uncertainty (RSS three terms from steps 3, 4 and 5) 7. Standard uncertainty of mismatch 8. Combined measurement uncertainty @ k=1 UC = ( Max(ρDUT ) • Max(ρSensor ) + ( sysrss Appendix A 1. The noise to power ratio is capped for powers > 100 μW, in these cases use: Noise/100 μW. 16 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
- The noise to power ratio is capped for powers > 100 μW, in these cases use: Noise/100 μW. Uncertainty calculations for a power measurement (settled, average power) (Specification values from this document are in bold italic, values calculated on this page are underlined.) Process In Free Run, auto zero mode average = 16 Calculate noise contribution – If in Free Run mode, Noise = Measurement noise x free run multiplier = 100 nW x 0.6 = 60 nW – If in Trigger mode, Noise = Noise-per-sample x noise per sample multiplier 4. Zero uncertainty 5. Sensor calibration uncertainty (RSS three terms from steps 3, 4 and 5) 7. Standard uncertainty of mismatch 8. Combined measurement uncertainty @ k=1 UC = ( Max(ρDUT ) • Max(ρSensor ) + ( sysrss 2.13% 17 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
A. System contribution to measurement uncertainty versus power level (equates to step 6 result/2) Standard uncertainty of mismatch - 1 sigma (%) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 ρSensor ρDUT Note: The above graph is valid for conditions of free-run operation, with a signal within the video bandwidth setting on the system. Humidity < 70 %. B. Standard uncertainty of mismatch Note: The above graph shows the Standard Uncertainty of Mismatch = ρDUT. ρSensor /√2, rather than the Mismatch Uncertainty Limits. This term assumes that both the Source and Load have uniform magnitude and uniform phase probability distributions. SWR ρ SWR ρ 1.0 0.00 1.8 0.29 1.05 0.02 1.90 0.31 1.10 0.05 2.00 0.33 1.15 0.07 2.10 0.35 1.20 0.09 2.20 0.38 1.25 0.11 2.30 0.39 1.30 0.13 2.40 0.41 1.35 0.15 2.50 0.43 1.40 0.17 2.60 0.44 1.45 0.18 2.70 0.46 1.5 0.20 2.80 0.47 1.6 0.23 2.90 0.49 1.7 0.26 3.00 0.50 C. Combine A & B UC = √ (Value from Graph A)2 + (Value from Graph B)2 Graphical Example 18 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Ordering Information
U2021XA X-Series USB peak and average power sensor, 50 MHz to 18 GHz U2022XA X-Series USB peak and average power sensor, 50 MHz to 40 GHz Standard shipped Items – Power sensor cable 5 ft (1.5 m), default cable length – BNC male to SMB female trigger cable, 50 Ω, 1.5 m (ships with 2 quantities) – Certificate of calibration – CD documentation – N1918A Power Analysis Manager software CD – Keysight Instrument Control DVD (contains IO Libraries Suite, Command Expert and BenchVue software) Options Description Travel kits U2000A-201 Transit case U2000A-202 Soft carrying case U2000A-203 Holster U2000A-204 Soft carrying pouch Cables (selectable during sensor purchase) U2000A-301 Power sensor cable, 5 ft (1.5 m) U2000A-302 Power sensor cable, 10 ft (3 m) U2000A-303 Power sensor cable, 16.4 ft (5 m) Cables (ordered standalone) U2031A Power sensor cable, 5 ft (1.5 m) U2031B Power sensor cable, 10 ft (3 m) U2031C Power sensor cable, 16.4 ft (5 m) U2032A BNC male to SMB female trigger cable, 50 Ω , 1.5 m Software BV0007A BenchVue Power Meter Pro App license Calibration U202x X A-1A7 ISO17025 compliant calibration and test data U202xXA-A6J ANZIZ540 compliant calibration and test data 19 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
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