RadiMation Application Note 148: Difference between revisions

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{{ScreenElementDescription|Measure time|The measure time set in the receiver, see table with different bands for possible values}}
{{ScreenElementDescription|Measure time|The measure time set in the receiver, see table with different bands for possible values}}
{{ScreenElementDescription|Preamplifier|The preamplifier setting set in the receiver}}
{{ScreenElementDescription|Preamplifier|The preamplifier setting set in the receiver}}
{{ScreenElementDescription|Traces|The type of trace set in the receiver, for MIL-STD-461 CE101 a peak detector is used}}
{{ScreenElementDescription|Traces|The type of trace set in the receiver, for MIL-STD-461 CE101 only a peak detector is used}}
{{ScreenElementDescription|Test Equipment|The equipment used for the measurement, see table with different bands for possible values}}
{{ScreenElementDescription|Test Equipment|The equipment used for the measurement, see table with different bands for possible values}}
{{ScreenElementDescription|Location type|Set this to "Current sensor"}}
{{ScreenElementDescription|Location type|Set this to "Current sensor"}}

Revision as of 10:23, 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 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 with different bands for possible values
ScreenElementDescription.svg Step size The step size set in the receiver, see table with different bands for possible values
ScreenElementDescription.svg Measure time The measure time set in the receiver, see table 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, see table with different bands for possible values
ScreenElementDescription.svg Location type Set this to "Current sensor"
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, no final peaks should be measured in MIL-STD-461 CE101
ScreenElementDescription.svg Peak detection How many peaks should be detected automatically, no final peaks should be measured for MIL-STD-461 CE101
ScreenElementDescription.svg Final peak measurement It is possible to perform a final measurement on a peak with a specific detector, no final peak measurement is needed for CE101


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®.