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N6141A & W6141A EMI X-Series Measurement Application

Technical Overviews

Technical Overview

EMI Measurement Application

To avoid costly delays that can result from failed compliance testing, Keysight's EMI measurement application on X-Series signal analyzers allows you to perform precompliance measurements and diagnostic evaluation of your designs.

Find and fix problems before they enter the test chamber with the N6141A measurement application on the N9030A PXA, N9020A MXA, or N9010A EXA, or W6141A on the N9000A CXA for a low-cost pre-compliance test solution.

The application’s wide range of features enables you to:

- Use the scan table to set up frequency ranges, gains, bandwidths, and dwell time

- Scan a frequency range and display the results in log or linear format

- Identify suspect signals in the frequency scan

- Measure the peak, quasi-peak, EMI-average or RMS-average values of these suspect signals and place the results in the signal list

- Easily identify signals that fail the regulatory agency limit

The EMI measurement application is just one in a common library of more than 25 measurement applications in the Keysight X-Series, an evolutionary approach to signal analysis that spans instrumentation, measurements and software.

The X-Series analyzers, with upgradeable CPU, memory, disk drives, and I/O ports, enable you to keep your test assets current and extend instrument longevity.

Proven algorithms, 100% code-compatibility and a common UI across the X-Series create a consistent measurement framework for signal analysis that ensures repeatable results and measurement integrity so you can leverage your test system software through all phases of product development.

You can further extend your test assets by transporting applications across multiple X-Series signal analyzers.

Key features

- Measure emissions with built-in commercial–and MIL-STD–compliant bandwidths, detectors, and band presets

- Compare measured emissions to regulatory limits

- Continuously monitor signals with bar meters to detect maximum amplitude

- Collect lists of suspect emissions

- Differentiate between ambient signals and device emissions

- View signals over time to identify intermittent responses

- Generate reports in HTML format including signal list, images and trace, and correction data

EMI measurement application vs. Option EMI

There are two EMI options for X-Series signal analyzers: Option EMC and the N/W6141A measurement application.

Option EMC enables basic EMC measurements. It contains CISPR 16-1-1 compliant bandwidths and detectors (peak, quasi-peak, EMI average, RMS average) as well as CISPR band presets (bands A through E), and MIL-STD bandwidths that meet MIL-STD 461D/E/F requirements.

The EMI measurement application includes Option EMC and provides a wide range of additional features that enable the user to perform precompliance conducted and radiated emissions tests to both commercial and MIL-STD requirements. The following table summarizes a comparison of features.

EMI Precompliance Measurements

Over the past two decades, precompliance emissions measurements have been gaining in popularity. Performing precompliance radiated and conducted emissions measurements early in the design cycle can reduce development expense and speed time to market by ensuring new designs will pass final compliance testing at an accredited facility the first time around, without costly redesign and re-testing.

For a step-by-step guide on how to make precompliance measurements according to regulatory agency limits, refer to the application note, Making Conducted and Radiated Emissions Measurements, literature number 5990-6152EN.

Conducted emissions measurements

The EMI measurement application allows you to measure the emissions that are conducted along a power line. The transducer used to couple the emissions of the power line to the signal analyzer is a line impedance stabilization network (LISN). The frequency range of conducted emissions is 9 kHz to 30 MHz depending on the regulatory agency.

Radiated emissions measurements

Performing precompliance radiated emissions measurements is not as straight forward as conducted emissions measurements. When measuring to commercial standards, the antenna is placed 3 to 10 meters from the device under test (DUT) and the DUT should be rotated in order to find the maximum radiation.

With the addition of the EMI measurement application, the X-Series signal analyzer becomes a powerful EMI precompliance measurement analyzer. Measure designs to the latest CISPR 16-1-1 or MIL-STD requirements. The robust signal list feature enables you to quickly differentiate between the DUT and the ambient signal environment.

Regulatory standards

X-Series signal analyzers with the EMI measurement application can be used for making precompliance measurements to any international EMC standard. Simply select the performance level and frequency range for your application.

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