Year: 2018

Just a Moment

We’ve all heard it – I’ll be with you in moment or I’ll call you back in a moment and it seems as if the moment takes forever. When we say it, the intention indicates a prompt action without committing to an exact time – but promptly is understood. During a recent training session I […]

Review of MIL-STD 461 CS118 – Electrostatic Discharge

MIL-STD-461G, released in December 2015, added a test for Personnel Borne Electrostatic Discharge (ESD). Prior to this release, this type of test for electronic systems and sub-systems was managed at the system level under MIL-STD-464C released in 2010. Both of these standards contain similar requirements. MIL-STD-461G provides the details on testing and MIL-STD-464C established the […]

Review of MIL-STD 461 CS114– Conducted Susceptibility, Bulk Cable Injection

This article discusses CS114, including the updates contained in MIL-STD-461 revision “G”, the current revision and the associated nuances that lead to test errors.  The fundamental idea behind CS114 testing is to simulate currents induced into cabling from electromagnetic (EM) fields from high level emissions, intentional or unintentional.  This test allows an evaluation in the […]

Review of MIL-STD 461 RS101– Radiated Susceptibility, Magnetic Field and RS103 Radiated Susceptibility, Electric Field

This article discusses RS101 and RS103, including the updates contained in MIL-STD-461 revision “G”, the current revision.  These tests quantify the ability of a device to tolerate undesired signals present as a field at the device and associated cables.  The field has the potential of coupling the interference into the device circuitry and cause performance […]

Review of MIL-STD 461 RE101– Radiated Emissions, Magnetic Field and RE102 Radiated Emissions, Electric Field

RE01 (RE04) covered the frequency range of 30 Hz to 50 kHz with the magnetic loop antenna located 1-meter from the Equipment Under Test (EUT). The limit was in dBpT (dB referenced to 1 picotesla) terms indicating a flux density measurement. RE02 covered the frequency range of 14 kHz to 10 GHz for narrowband (NB) […]

The Changing Role of MIL-STD EMC Professionals

MIL-STD-461 has been an equipment qualification standard since 1967 when commercial test laboratories became involved in testing. MIL-STD-461 provided the specific requirements and limits and MIL-STD-462 provided the test details. Evolving over the years with advances in technology, the current version, MIL-STD-461G, was released in December 2015 and provides requirements and test details for 19 […]

Review of MIL-STD 461 CE101- Audio Frequency Currents and CE102 Radio Frequency Potentials – Power Leads

This article discusses CE101 and CE102, including the updates contained in MIL-STD-461 revision “G”, the current version. The test title for CE101 “Conducted Emission Audio Frequency Currents, Power Leads” and for CE102 “Conducted Emissions Radio Frequency Potentials, Power Leads” provide insight into the test frequency range and methods of measurement. These tests quantify undesired signals […]

Review of MIL-STD 461 CS101– Low Frequency Susceptibility – Power

This article reviews MIL-STD-461 CS101 including the updates contained in revision “G” the current version.  The test title “Conducted Susceptibility, Power Leads” pretty well defines the test, where interference is applied to the power input of the Equipment Under Test (EUT).  During application of the interference the EUT is monitored to verify acceptable performance.  Note […]

Steve Ferguson Retires from Washington Labs

Press release from Washington Labs   “Steve Ferguson, Executive Vice President of Washington Labs has officially retired from Washington Labs’ service (but not from work) effective 31 December 2017. Steve first joined WLL on 14 September 1998 as Chief of Operations, heading up the overall day-to-day engineering management of the company. He was key to […]