RadiMation Application Note 148: Difference between revisions

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== How to perform a MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test ==
== How to perform a MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test ==
This application note explains how the MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test can be performed with {{RadiMation}}.
This application note explains how the MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test can be performed with {{RadiMation}}.<br>
The MIL-STD-461 CE101 test measures conducted emissions of low-frequency currents (30 Hz to 10 kHz) on power leads from a device under test to ensure compliance with electromagnetic interference (EMI) standards.


The exact requirements and test methods for the CE101 are specified in the [[MIL-STD-461]].
The exact requirements and test methods for the CE101 are specified in the [[MIL-STD-461]].
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{{ScreenElementDescription|Location type|As a current sensor is used to measure the emission {{ScreenElement|Current Sensor}} has to be selected for {{ScreenElement|Locationtype}}}}
{{ScreenElementDescription|Location type|As a current sensor is used to measure the emission {{ScreenElement|Current Sensor}} has to be selected for {{ScreenElement|Locationtype}}}}
{{ScreenElementDescription|Limit Lines|The applicable limit line can be added, in this case "MIL-STD-461G CE101-1 Surface ships and submarine applications, DC"}}
{{ScreenElementDescription|Limit Lines|The applicable limit line can be added, in this case "MIL-STD-461G CE101-1 Surface ships and submarine applications, DC"}}
{{ScreenElementDescription|All peaks above x dB below the limit line|Which level above x dB below the limit line should detect peaks, no final peaks should be measured in MIL-STD-461 CE101}}
{{ScreenElementDescription|All peaks above x dB below the limit line|Which level above x dB below the limit line should detect peaks, CE101 does not require that a final peak measurement is performed on peaks. Therefor this value is not important and can be left to 0}}
{{ScreenElementDescription|Peak detection|CE101 does not require that a final peak measurement is performed on peaks, thus peak detection can be left off.}}
{{ScreenElementDescription|Peak detection|CE101 does not require that a final peak measurement is performed on peaks, thus peak detection can be set to {{ScreenElement|No peaks}}.}}
{{ScreenElementDescription|Final peak measurement|CE101 does not require that a final peak measurement is performed on detected peaks, thus all detectors can be left unchecked.}}
{{ScreenElementDescription|Final peak measurement|CE101 does not require that a final peak measurement is performed on detected peaks, thus all detectors can be left unchecked.}}
{{ScreenElementDescriptionEnd}}
{{ScreenElementDescriptionEnd}}
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== Conclusion ==
== Conclusion ==
The MIL-STD-461 CE101 test is using different receiver settings depending on the frequency band. All these settings can be easily configured in a "Test Setup File" and tested with {{RadiMation}}.
The MIL-STD-461 CE101 test is using different receiver settings depending on the frequency band. All these settings can be easily configured in a "Test Setup File" and tested with {{RadiMation}}. The result of the emission measurement is shown with a dBuA unit, and can be compared to the limit line as specified by the standard.


[[Category:RadiMation Application Note]]
[[Category:RadiMation Application Note]]

Latest revision as of 12:11, 24 October 2024

How to perform a MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test[edit]

This application note explains how the MIL-STD-461 CE101, Conducted Emissions, audio frequency currents, power leads test can be performed with RadiMation®.
The MIL-STD-461 CE101 test measures conducted emissions of low-frequency currents (30 Hz to 10 kHz) on power leads from a device under test to ensure compliance with electromagnetic interference (EMI) standards.

The exact requirements and test methods for the CE101 are specified in the MIL-STD-461.

Necessary equipment[edit]

The following devices are necessary to execute this test:

  • Receiver
  • Current sensor
  • LISN
  • Cable

Configuration of the test sites[edit]

The configuration of the equipment is a current sensor connected with a cable to a receiver.

CE101 Test layout.png

The configuration of the test site should contain the following devices:

# Device name Tab in testsite configuration window note
Current sensor Devices 2 Current sensor
Spectrum Analyser Devices 2 The receiver used for the test
Cables
Cable preamp -> analyser Cables Cable with a correction file specified for the cable loss
Information.png
Note: the LISN is only used to decouple and it is not needed to specify and configure this in RadiMation®

Configuration of the Current sensor[edit]

The current sensor needs to have the correction data applied which is normally known by the manufacturer or provided by a calibration company. The correction data is often expressed in Ohm (Resistance).

In RadiMation® this can be configured by creating a correction file, which contains a 'Frequency' and a 'Correction' column. Then specify the frequencies and the correction values in the correction file. The correction values are expressed in Ohm.

It is also possible to specify the values in dBOhm, in that case the Correction column needs to be removed and then a new column should be added of type 'Resistance' with the unit dBOhm.

After creating a correction file and saving it to disk it is now important to select this correction file in the Current Sensor device driver.

For more information about the current sensor correction see Current sensor impedance

Perform the test[edit]

To perform the actual CE101 test, start a Conducted Emission Multiband test:

   Menu.svg Tests
      Menu.svg Conducted Emission
         Menu.svg Multiband

The complete test from 30 Hz up to 10 kHz has different settings for different frequency bands. All these different bands can be configured. The test can be configured with 2 bands, each using their applicable frequency range, measure time and bandwidth.

Band Frequency range RBW Step size Measure time receiver Measure time FFT receiver
Band 1 30 Hz - 1 kHz 10 Hz 5 Hz 0.15 s 1 s
Band 2 1 kHz - 10 kHz 100 Hz 50 Hz 0.015 s 1 s

In the following test configuration an EUT for "Surface ships and submarine applications, DC" is tested.

CE101 Test Configuration.png


ScreenElementDescription.svg Start The start frequency of the test. For example 30 Hz.
ScreenElementDescription.svg Stop The stop frequency of the test. For example 10 kHz.
ScreenElementDescription.svg Reference Level The reference level set in an analyser, not used in a receiver
ScreenElementDescription.svg Attenuation The attenuation set in the receiver
ScreenElementDescription.svg RBW The RBW set in the receiver, see 'Table II' with different bands for possible values
ScreenElementDescription.svg Step size The step size set in the receiver, see 'Table II' with different bands for possible values
ScreenElementDescription.svg Measure time The measure time set in the receiver, see 'Table II' with different bands for possible values
ScreenElementDescription.svg Preamplifier The preamplifier setting set in the receiver
ScreenElementDescription.svg Traces The type of trace set in the receiver, for MIL-STD-461 CE101 only a peak detector is used
ScreenElementDescription.svg Test Equipment The equipment used for the measurement
ScreenElementDescription.svg Location type As a current sensor is used to measure the emission Current Sensor has to be selected for Locationtype
ScreenElementDescription.svg Limit Lines The applicable limit line can be added, in this case "MIL-STD-461G CE101-1 Surface ships and submarine applications, DC"
ScreenElementDescription.svg All peaks above x dB below the limit line Which level above x dB below the limit line should detect peaks, CE101 does not require that a final peak measurement is performed on peaks. Therefor this value is not important and can be left to 0
ScreenElementDescription.svg Peak detection CE101 does not require that a final peak measurement is performed on peaks, thus peak detection can be set to No peaks.
ScreenElementDescription.svg Final peak measurement CE101 does not require that a final peak measurement is performed on detected peaks, thus all detectors can be left unchecked.


When all parameters are configured for the CE101 test, press Start Test to perform the conducted emission measurement.

Review the measurement[edit]

Once the test is finished, the results of this test are stored in the EUT file and available as one of the performed Tests in the EUT file. Selecting the corresponding test result and pressing on Info will show the test results again. CE101 Test Result.png

Conclusion[edit]

The MIL-STD-461 CE101 test is using different receiver settings depending on the frequency band. All these settings can be easily configured in a "Test Setup File" and tested with RadiMation®. The result of the emission measurement is shown with a dBuA unit, and can be compared to the limit line as specified by the standard.