Category: Steve’s Blog

Review of MIL-STD 461 CS103 Intermodulation, CS104 Rejection of Undesired Signals and CS105 Cross-Modulation

Introduction  Rapid technology advances in the wireless communications world makes test and evaluation of Radio Frequency (RF) devices a difficult subject.  It seems that by the time a new device hits the market, it has been made obsolete by the next generation.  I recall hearing from a major electronics manufacturer CEO that 90% of sales happen within 90-days of market […]

Review of MIL-STD 461 CS117 Lightning Induced Transients, Cables and Power Leads

Lightning may produce a spectacular display when viewed, but the associated electromagnetic effects (EME) has the potential (pun intended) to severely damage electrical and electronic circuits. MIL-STD-461G added a new test method to evaluate device tolerance for induced current on equipment cables or insulation breakdown from the effects of indirect lightning. Although new to MIL-STD-461, […]

Review of MIL-STD 461 CE106 Conducted Emissions, Antenna Port

Let’s take on the challenging evaluation of detection and measurement of antenna port emissions – the unintentional emissions that creep through the device circuitry and are presented to the world through an intentional wireless connection.  We are NOT going into an in-depth study of antennas and we are NOT exploring what the unintentional signals may reveal.  A simple discussion on getting measurements without […]

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 […]