Index termsadvanced modulation formats, biterror ratio. The basics of gage uncertainty gagetrak calibration. Error vector magnitude evm measurements can provide a great deal of insight into the per formance of digitally modulated signals. This article discusses evms major components and explains the graphical tools that project managers can use to assess project performance trends. Understanding error vector magnitude electronic design. Implementing iso 17025 measurement uncertainty requirements in software video get some insights into how to use fluke calibration software to implement the. The evm in this subsection was determined using the proprietary software installed in the vsa. The studies on evm and software projects in the literature address the uncertainty and changeability in software projects, by focusing on preventing andor avoiding the uncertainty and change. This signal can be called pa enable signal, which is a. Uqlab is a software framework for uncertainty quantification developed at eth zurich. To the best of the authors knowledge, there are no analytical expressions for sparameter total differentials to express uncertainty estimation in sparameters re. In this mode, an onoff signal is used to turn the pa on or off. Finally, it multiplies combined uncertainty by a coverage factor usually 2 to get expanded uncertainty.
Pdf download sep 17, 2019 in wireless communication systems, power amplifiers pas make a significant contribution to the quality attained in the rf chain. One of the top challenges in the industry today is getting management to understand and invest in program controls best practices. Applying earned value management to software intensive. Several studies have investigated methods for estimating uncertainty in evm measurements 6, 7 and the ieee p1765 standards development working group is developing a recommended practice for estimating the uncertainty of evm. Practical software measurement, performancebased earned value. Test and measurement waveform generation, visualization, and performance analysis communications toolbox provides an app for waveform generation and quantitative tools for. An intro to uncertainty analysis presentation file is also installed with the software. Gumsim software for determination of measurement uncertainty an ideal tool to help implement measurement uncertainty acc.
Mathos laboratory uncertainty calculator this is a web interface for uncertainty calculations. Uncertainty analysis in evm measurement using a monte. A change management model and its application in software. Deviations from the true value measurement uncertainty always accompany measurements carried out in the context of the evaluation or calibration of measurement instruments or procedures. As defined by the 3gpp standard, the unit of measure for rms, maximum, and percentile evm measurements is a percentile %. Evm measurement using mxa n9020a keysight community. You then test the cnn with softwaredefined radio sdr hardware and overtheair signals. How use calibration software to implement iso 17025 fluke. The pa is on when this signal is on, and is off when this signal is off. Importance of preserving correlations in errorvector. Rf output from msg is fed to mxa and tried to measure evm.
Earned value management evm is a well known project management technique which measures the integration of technical performance, cost and schedule against planned performance within a given. Evaluation of fuel flow measurement uncertainty in a. Recommended software programs are sorted by os platform windows, macos, linux, ios, android etc. More general calculations, consistent with the gum, for the propagation of distribu. By international agreement, this uncertainty has a probabilistic basis and. Measuring earned value evm on agile and scrum software. Informally, evm is a measure of how far the points are from the ideal locations. Millimeterwave modulatedsignal and errorvectormagnitude measurement with uncertainty.
Ni equips engineers and scientists with systems that accelerate productivity, innovation, and discovery. For earned value purposes, the most effective software metrics are those that relate to product size, schedule, quality, and progress. In metrology, measurement uncertainty is the expression of the statistical dispersion of the values attributed to a measured quantity. Evm, measurement uncertainty, microwave measurement. This video shows the use of error vector magnitude evm measurement in vss. Calibrate each sensorparameter via the calibration screen. Millimeterwave modulatedsignal and errorvectormagnitude. Click on the tab below to simply browse between the. I know that it is possible through spike at least one of. I have a 89601b with n9030a pxa and want to measure 802. Noise, distortion, spurious signals, and phase noise all degrade evm, and therefore evm provides a comprehensive measure of the quality of the radio receiver or transmitter for use in digital communications. We adapt a recently developed microwave uncertainty framework to the problem and use it to estimate the uncertainties in the modulatedsignal measurements.
Essential for the performance of the vcmm is the provision of input parameters to describe all. A simpletouse, powerful system for managing project costs, measuring earned value and analyzing budgets, actuals and forecasts. Practical software measurement mcgarry, card, jones. In my setup i have one lte 10mhz waveform which is loaded and played on msg n5182a at 2. While the agilent 89400 vector signal analyzers perform. List of uncertainty propagation software wikipedia. Error vector magnitude evm is a measure of modulation quality and. Error vector magnitude as a performance measure for. The intent is to inspire an appreciation for the earned value concept and emphasize how performance measurement techniques can be a valuable management tool. It provides a method to evaluate the performance of softwaredefined.
All measurements are subject to uncertainty and a measurement result is complete only when it is accompanied by a statement of the associated uncertainty, such as the standard deviation. First, the evm of the generator itself with different modulation schemes was measured. Prior work has generally focused on estimating the evm and associated uncertainty of relatively narrowband less than 20 mhz modulatedsignal sources 21 26. Models of uncertainties related to all calibration and measurement procedures within the traceability path are included in a sensitivity analysis and monte carlo simulations that maintain correlations between timeand frequencydomain errors. Evm is a standardized method to monitor and control a project.
Evm is computed by comparing the measured signal with an ideal reference signal to determine the error vector. Apart from a commonly applied typical assessment method, monte carlo mc simulations may be used. Free measurement uncertainty calculation software from. With cobra, youll be able to demonstrate success by quickly producing accurate. The evm measurement is dramatically degraded when the reference level is set too low, as clipping inside the signal analyzer significantly affects modulation quality. Practical software measurement, performancebased earned.
Models of uncertainties related to all calibration and measurement procedures within the traceability path are included in a sensitivity analysis and monte carlo simulations that maintain. This article provides an introduction to the basic concepts of earned value management evm, from initial project planning through execution including data analysis techniques and baseline revisions. Using the generated waveforms as training data, you train a cnn for modulation classification. With proper use, evm and related measurements can pinpoint exactly the type of degradations present in a signal and can even help identify their sources. Using earned value management evm as the key, integrating tool for control. I need to measure evm on a dqpsk modulated signal and was thinking of using bb60. Measuring integrated progress on agile software development projects. Verify the time and date is set correctly setup\timedate menu. An innovative method for highaccuracy evm measurements. This is a measure of how far off a receiver is from transmitting its ideal constellation symbol point. Constellation diagram from a commercial software package for a. The user or supplier that is implementing software for uncertainty evaluation would need to consider software units of the types covered here.
The actual measured value and the related uncertainty are stated together in the measurement report of the cmm software. The anritsu ms2781b specifications for evm accuracy provide only a residual evm, which is the same as a floor. Moreover, as the reference level is slowly increased, the noise floor of the signal analyzer itself increasingly becomes the largest contributor to measurement uncertainty. We are pleased to offer a freeware application for calculating and analyzing measurement uncertainty that incorporates the concepts and methods presented in the international organization for standardization iso guide to the expression of uncertainty in measurement gum. Residual evm is the lowest evm that can be measured, the level at which the uncertainty contribution of the hardware is equal to that of the dut. If the selected system diagram is configured for a swept simulation, the measurement has additional parameters for specifying the plotting configuration for each swept parameter. Pdf traceable measurement of source and receiver evm. The evm measurement uncertainty analysis is discussed in section. Characterization of a 300ghz transmission system for. This analysis method involves a number of project data and formulae in order to establish or forecast project performance and health. The iq signal is first demodulated using vsa software and the measure of the modulated rf signal using oscilloscope and ysa software. The evm spectrum measurement shows an interfering signal. There are measurement tradeoffs when using the digitizing oscilloscopes instead of the 89600 or combination of psa or esa and 89600.
However, they do not propose any solution that incorporates change as a significant parameter in the calculations. A simpletouse, powerful system for managing project costs, measuring earned value and analysing budgets, actuals and forecasts. It is evident that a projects success depends on 3 factors all together. Earned value project management method and extensions. Uncertainties is a potent free calculator and python software library for transparently performing calculations with uncertainties and correlations. I have a bnc cable connected between the 10 mhz out port of the signal generator and the ext ref in port of the analyzer. Pdf millimeterwave modulatedsignal and errorvector. Earned value management evm integrates three critical project management elementscost, schedule, scopeinto a system that enables project managers to effectively gauge project performance and forecast potential project problems. N9040b uxa signal analyzer, multitouch, 2 hz to 50 ghz. Ber, error vector magnitude evm, software defined trans mitter. The simulations are frequently performed by a computer program, which has to be written, and therefore some programming skills are required. Measuring the error vector magnitude evm of a modulated. Place the evm in a specific location for area monitoring.
Evm error vector magnitude system object measures the modulator or demodulator performance of an impaired signal. Hi all, i am designing an automated production test system for an ism band 2. Setup your session parameters either in 3mtm detection management software dms or via the instruments setup screen. The eutralte measurement software makes use of the iq capture. Expanded uncertainty is the number we need to put on a calibration certificate when a certificate is required. Uncertainty is the doubt about the measurement result 117, i. Addisonwesley, 2002 identifies seven information categories and expands these information categories into measurable concepts and then prospective metrics. Use a convolutional neural network cnn for modulation classification. Measurement uncertainty calculations for ph value obtained. The n9040b uxa is a highperformance,xseries signal analyzer. These parameters are dynamic and change based upon which data source is selected.
Traceable measurement of source and receiver evm using a realtime oscilloscope article pdf available in ieee transactions on instrumentation and measurement 626. You can also display the normalized evm value that is called out in the 802. Evm, or error vector magnitude, is essentially a scalar. Evm is the normalized sum of the squared distance between ideal symbols and the received iq samples. Measurement of error vector magnitude from agilent.
To improve the efficiency, the pa can work in an energy saving mode. This interval is interpreted as the extended measurement uncertainty u k2 with a coverage of 95%. An assessment of measurement uncertainty is a task, which has to be the final step of every chemical assay. It is a generalpurpose software running in matlab which contains stateoftheart methods for monte carlo simulation, dependence modelling copula theory, surrogate. It is highly recommended that you read the application note keysight infiniium oscilloscope performance guide using 89601a vector signal analysis software, publication number 59884096en. Laboratory measurements always involve uncertainty, which must be considered when analytical results are used as part of a basis for making decisions. Outputs the maximum evm of an input vector or frame.
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