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Keysight N9038A Demo Manual
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Keysight N9038A Demo Manual

Keysight N9038A Demo Manual

Mxe emi receiver self-guided demonstration
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Keysight N9038A
MXE EMI Receiver
Self-Guided Demonstration
Demo Guide
This document demonstrates
electromagnetic interference (EMI)
compliance measurements using
the MXE EMI receiver.

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Summary of Contents for Keysight N9038A

  • Page 1 Keysight N9038A MXE EMI Receiver Self-Guided Demonstration Demo Guide This document demonstrates electromagnetic interference (EMI) compliance measurements using the MXE EMI receiver.

  • Page 2: Table Of Contents

    02 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Table of Contents Introduction ..........................3 Demonstration Preparation ..................... 5 Making Measurements ......................6 Single Frequency Measurement.................... 20 Diagnostic Tools ........................22 Other Features ........................25 Appendix ..........................28...

  • Page 3: Introduction

    The MXE allows you to fully test devices up to 44 GHz in compliance with CISPR 16-1-1:2010 and MIL-STD-461. This guide follows the EMI test flow recommended by CISPR and uses an N9038A MXE EMI receiver with firmware version A.13.58, a whip antenna, and an N5181/ 2B MXG X-Series signal generator.
  • Page 4 04 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Navigating the menu system Prescan Before starting the demonstration, it is important to understand the MXE’s menu structure. The meters menu is for making a single frequency measurement with up to three detectors updated simultaneously.

  • Page 5: Demonstration Preparation

    05 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demonstration Preparation This demonstration guide includes the following sections: – Making measurements – Diagnostic testing tools – Single frequency measurement – Other features The Making Measurements section is organized according to the test flow recommended by CISPR as shown in Figure 2.

  • Page 6: Making Measurements

    06 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Making Measurements Step 1: Prescan For some EMI standards, limit lines are given for quasi-peak and EMI average detectors, Did you know? which requires an extremely long measurement time. Usually, a prescan with the peak...
  • Page 7 07 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Figure 3. Recall limit lines Figure 4. Limit line editor Figure 5. Limit plus margin...
  • Page 8 08 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 2: Load and edit corrections In this demonstration, we will load the built-in correction file “Antenna, Broadband (26 MHz to 3 GHz).csv.” The MXE has built-in correction files for many accessories on the market, such as amplifiers, LISNs, and antennas.
  • Page 9 09 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 3: Set up scan table Did you know? The MXE offers a scan table which allows you to configure your scans in up to 10 You can set up two or more ranges different ranges.
  • Page 10 10 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 4: Multiple trace scan to view max hold and current Did you know? signal values The MXE’s digital IF architecture The recommended commercial prescanning methodology requires that suspect...
  • Page 11 11 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 5: Reduce prescan time with time domain scan Did you know? The MXE supports three scan types: {Smooth}, {Discrete}, and {Time Domain}. Discrete The MXE allows you to set scan is the traditional stepped frequency scan.
  • Page 12 12 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Step 2: Data reduction Did you know? Suspect frequencies that are close to or greater than specified limits warrant further The MXE can search just the top review and final measurement.
  • Page 13 13 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 2: Search in sub-ranges In this demonstration, we will set {Search Criteria} to {Subranges and Limits}, which divides the frequency band into a specified number of subranges and selects one peak in each subrange if there are any signals over the limit line.
  • Page 14 14 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 3: Delete or add signals The MXE allows you to edit a signal list by marking and deleting signals or adding a signal at the current marker frequency. The MXE offers flexible features to adjust the frequencies of signals in the signal list as shown in Table 2.
  • Page 15 15 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Step 3: Maximization Before final measurement, it is important to maximize each signal. This step allows you to find out the maximum amplitude of each suspect signal through frequency adjustment, antenna height scan, azimuth rotation, and polarization change.
  • Page 16 16 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 2: Tune signals in spectrum analyzer mode In this demonstration, we will switch to spectrum analyzer mode to tune a signal with the flexible span/RBW, max hold, and PowerSuite features. A very useful function for this use case is {Global Center Frequency}, which couples the meters frequency in EMI receiver mode and the center frequency in spectrum analyzer mode.
  • Page 17 17 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Demo 3: Tune signals in monitor spectrum measurement Did you know? Monitor spectrum is a measurement in EMI receiver mode that updates the spectrum and Monitor spectrum shares the the meters simultaneously.
  • Page 18 18 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Step 4: Final measurement Did you know? Demo 1: Make a final measurement The MXE automatically conducts the scan, search, and final In this demonstration, we will conduct final measurements with peak, quasi-peak, and EMI average detectors for all of the signals in the list.
  • Page 19 19 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Step 5: Report generation The MXE supports two report formats, HTML and PDF. You can customize content to include amplitude corrections, limits, scan tables, trace data, signal lists, and screen shots.

  • Page 20: Single Frequency Measurement

    20 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Single Frequency Measurement Did you know? To measure discrete frequencies, you can use the meters and measure at marker The meters graph in Strip Chart functions instead of scanning the whole range.
  • Page 21 21 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Measure at marker Different from meters, measure at marker captures the frequency of the current marker (only within the range displayed of the frequency scan measurement). Measure at marker shares all of the same settings as the (re) measure function for scan sequence.

  • Page 22: Diagnostic Tools

    22 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Diagnostic Tools In addition to world-class EMI compliance measurement features, the MXE offers a full range of diagnostic tools that can speed up the time-to-repair, including spectrum analysis, Strip Chart, spectrogram, trace zoom, and monitor spectrum.
  • Page 23 23 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Spectrogram Spectrogram is a tool for tracking signal characteristics in both frequency and time domain. It’s a powerful tool to analyze time variant and frequency hopping signals.
  • Page 24 24 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Trace zoom Did you know? Trace zoom in spectrum analyzer mode allows you to view close-up and full-span Zone span is different from trace spectrum simultaneously in two separate windows. This is useful for looking into the zoom.

  • Page 25: Other Features

    25 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Other Features Did you know? Traditional limit lines are a function of frequency and amplitude. APD Amplitude probability distribution (APD) measures the probability of an emission limits differ from traditional limit exceeding a specified level.
  • Page 26 26 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Figure 23. APD Disturbance analyzer One type of commercial conducted emissions measurement is called a discontinuous disturbance, also known as click, measurement. Discontinuous disturbance parameters, measurement methodologies, and limits for various product types are provided in CISPR 14-1.
  • Page 27 27 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Disturbance Demo Instructions for MXE Keystrokes Ensure that the MXE is in receiver mode [Mode], {EMI Receiver} Preset the instrument [Mode Preset] Switch to disturbance analyzer measurement [Meas], {Disturbance Analyzer} Setup a 1 minute measurement at 1.4 MHz...

  • Page 28: Appendix

    28 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Appendix Frequently asked questions Following are answers to common questions when making compliance measurements with the MXE. Table 3. Troubleshooting the MXE Question Answer Should I use DC coupling for CISPR band A/B? It’s recommended to use DC coupling on the MXE for frequencies below 10 MHz, otherwise the noise...

  • Page 29: Web Resources

    29 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide File structures and locations The MXE can save measurement results and instrument configurations. Table 4 lists the kinds of files supported on the MXE, including settings, screenshots, and measurement results.
  • Page 30 30 | Keysight | N9038A MXE EMI Receiver Self-Guided Demonstration - Demo Guide Evolving Since 1939 For more information on Keysight Technologies’ products, applications or Our unique combination of hardware, software, services, and people can help you services, please contact your local Keysight reach your next breakthrough.