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MIL-STD-461 RS105 Radiated Susceptibility EMC Testing

As a leader in EMC regulatory compliance testing, Keystone Compliance assists electronic equipment manufacturers with MIL-STD 461 EMC testing. Meeting the IEC, EN, and other MIL-STD-461 testing requirements can be challenging. Not only do we understand the challenges, but we help guide companies through the process.

Keystone takes pride in providing the peace of mind that all of your MIL-STD-461 testing needs will be met all under one roof. Additionally, we are in constant communication throughout the entire test process. Our MIL-STD-461 test engineers work with clients to quickly develop appropriate and concise test plans.

Request a quote to receive expert MIL-STD-461 testing services tailored to your specific needs. Contact us to discuss your product and how we can assist you in achieving radiated susceptibility and immunity EMC lab testing certifications.

Summary of MIL-461 Electromagnetic Compatibility EMC Susceptibility Testing

The military standard compliance test is applicable to equipment and subsystem enclosures. These enclosures must be exposed to the external electromagnetic environment. For surface ships, this includes external, above deck and exposed below deck installations.

The MIL-461 radiated susceptibility (immunity) EMC test is also applicable to Army aircraft. This MIL-STD-461 test is strictly for safety critical equipment and subsystems located in external installation.

Scope of MIL-STD-461 Radiated Immunity 105 EMC Testing

The equipment under testing can not exhibit any signs of malfunctioning. The standard equipment can also not show signs of degradation of performance during the lab testing. Lastly, any deviation from specified indications when subjected to a test signal is not acceptable.

At least five pulses are applied at the rate of not more than one pulse per minute.

Testing equipment used within the MIL-STD 461 lab testing procedure includes equipment such as transverse electromagnetic cells. Test engineers must have knowledge on equipment such as transient pulse generators, terminal protection devices, and B- and D-dot sensor probes as well.

EMC data interpreted within this MIL RS105 electromagnetic compatibility test includes specific and general information. General EMC information might encompass data such as the time, date, location and test engineer. On the other hand, specific information may include but is not limited to the following:

  • Photographs of EUT orientation including cables.
  • A detailed written description of the EUT configuration.
  • Oscilloscope recordings that show peak value, rise time, and pulse width of one applied pulse for each EUT orientation.
  • Pulse number, with the first pulse being Number 1, for each recorded waveshape.
  • Record of the time-to-recovery for each EUT failure, if applicable.

MIL-STD EMC Immunity Compliance RS105 Testing Procedures

The EMC electromagnetic radiated immunity test procedures are used to verify the ability of the EUT enclosure to withstand transient electromagnetic emissions.

The setup of the EUT is described below. Caution and extreme care must be exercised if an open radiator is used for this test.

  • Calibration. The MIL EMC test equipment is configured accordingly. Before installing the EUT in the test volume, the B- and D- dot sensors are placed in the center position of the five point grid.
  • Then, the high-voltage probe is placed across the input to the radiation system at the output of the transient pulse generator.
  • The device under testing is configured pre compliance test. This is done by placing the EUT centerline on the centerline of the working volume of the radiation system. The EUT orientation is such that the maximum coupling of electronic and or magnetic fields is simulated.
  • Cables for EUT operation are oriented to minimize induced current. Next, the bottom plate is bonded to an earth reference. The EUT loads are placed in a shielded enclosure.
  • Lastly, the transient protection devices in the EUT power lines are placed near the power source. The transient pulse generator is connected to the radiation system.

The MIL-STD EMC radiated immunity and susceptibility test procedures are conducted as follows:

  • First, the measurement equipment is turned on. The equipment is left to allow sufficient stabilization time.
  • Next, the equipment is calibrated properly. This is done by generating a pulse and recording the drive pulse waveform as displayed on the oscilloscope.
  • The last step is conducting the test. This is done by turning on the EUT and testing the EUT in its orthogonal orientations. The EUT is strictly monitored by test engineers during and after each pulse. Signs of susceptibility or degradation of performance are not uncommon. If susceptibility is found, the threshold level is noted.

Keystone Compliance Offers Expert Electromagnetic Compatibility EMC RS105 Device Laboratory Testing

Keystone can accommodate fixed, mobile and portable devices of all sizes. Our team strives to give our customers more time and energy on product development instead of testing. In addition to EMC radiated susceptibility and immunity 105 testing, Keystone has a full scope of expertise including environmental and package testing such as vibration, accelerated aging, and cold chain

Complete our request a quote form to get a jump start on the conversation. Have a question about our standard military testing lab or EMC radiated immunity testing procedures? Contact us or call (724) 657-9940 and we will determine the best course of action.