RadiMation Application Note 148: Difference between revisions
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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. | 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 the [[Chapter_14#Current_sensor:_impedance|Current sensor impedance]] section in [[Chapter 14]] of the [[Manual| | For more information about the current sensor correction see the [[Chapter_14#Current_sensor:_impedance|Current sensor impedance]] section in [[Chapter 14]] of the [[Manual|{{RadiMation}} manual]]. | ||
== Perform the test == | == Perform the test == | ||
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{{Menu|Tests|Conducted Emission|Multiband}} | {{Menu|Tests|Conducted Emission|Multiband}} | ||
The complete test from 30 Hz up to 10 kHz has different settings for different frequency bands | The complete test from 30 Hz up to 10 kHz has different settings for different frequency bands. | ||
A single multiband test can be configured with 2 bands, each using their applicable frequency range, measure time and bandwidth. | |||
{|class="wikitable" | {|class="wikitable" | ||
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| Band 2 || 1 kHz - 10 kHz || 100 Hz || 50 Hz ||0.015 s || 1 s | | Band 2 || 1 kHz - 10 kHz || 100 Hz || 50 Hz ||0.015 s || 1 s | ||
|} | |} | ||
The requirements regarding the RBW and measure time should be taken from 'Table II' of the [[MIL-STD-461]]. | |||
In the following test configuration an EUT for "Surface ships and submarine applications, DC" is tested. | In the following test configuration an EUT for "Surface ships and submarine applications, DC" is tested. | ||
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{{ScreenElementDescription|Traces|The type of trace set in the receiver, for MIL-STD-461 CE101 only 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}} | {{ScreenElementDescription|Test Equipment|The equipment used for the measurement}} | ||
{{ScreenElementDescription|Location type|As a current sensor is used to measure the emission {{ScreenElement|Current Sensor}} has to be selected for {{ScreenElement| | {{ScreenElementDescription|Location type|As a current sensor is used to measure the emission {{ScreenElement|Current Sensor}} has to be selected for {{ScreenElement|Location type}}}} | ||
{{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, 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|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}} | ||
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== Review the measurement == | == Review the measurement == | ||
Once the test is finished, the results of this test are stored in the EUT file and available as one of the performed {{ScreenElement|Tests}} in the EUT file. Selecting the corresponding test result and pressing on {{ScreenElement|Info}} will show the test results again. | Once the test is finished, the results of this test are stored in the EUT file and available as one of the performed {{ScreenElement|Tests}} in the EUT file. Selecting the corresponding test result and pressing on {{ScreenElement|Info}} will show the test results again. | ||
[[File:CE101 Test Result.png]] | [[File:CE101 Test Result.png]] | ||
Latest revision as of 10:40, 4 November 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.
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 | |||
| ① | Cable preamp -> analyser | Cables | Cable with a correction file specified for the cable loss |
 |
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 the Current sensor impedance section in Chapter 14 of the RadiMation® manual.
Perform the test[edit]
To perform the actual CE101 test, start a Conducted Emission Multiband test:
-
Tests
- Conducted Emission
- Multiband
-
-
-
The complete test from 30 Hz up to 10 kHz has different settings for different frequency bands. A single multiband 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 |
The requirements regarding the RBW and measure time should be taken from 'Table II' of the MIL-STD-461.
In the following test configuration an EUT for "Surface ships and submarine applications, DC" is tested.
 Start
|
The start frequency of the test. For example 30 Hz. |
| Stop
|
The stop frequency of the test. For example 10 kHz. |
| Reference Level
|
The reference level set in an analyser, not used in a receiver |
| Attenuation
|
The attenuation set in the receiver |
| RBW
|
The RBW set in the receiver, see 'Table II' with different bands for possible values |
| Step size
|
The step size set in the receiver, see 'Table II' with different bands for possible values |
| Measure time
|
The measure time set in the receiver, see 'Table II' with different bands for possible values |
| Preamplifier
|
The preamplifier setting set in the receiver |
| Traces
|
The type of trace set in the receiver, for MIL-STD-461 CE101 only a peak detector is used |
| Test Equipment
|
The equipment used for the measurement |
| Location type
|
As a current sensor is used to measure the emission Current Sensor has to be selected for Location type |
| Limit Lines
|
The applicable limit line can be added, in this case "MIL-STD-461G CE101-1 Surface ships and submarine applications, DC" |
| 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 |
| Peak detection
|
CE101 does not require that a final peak measurement is performed on peaks, thus peak detection can be set to No peaks. |
| 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.
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.