Year: 2020

MIL-STD-461 Passive Calibration

When MIL-STD-461 revision “G” was issued, I believed that the answer to many of my measurement equipment calibration issues had been solved.  Right there in the “Calibration of measuring equipment” paragraph the requirements clearly stated “After the initial calibration passive devices such as measurement system antennas, current probes, and LISNs, require no further calibration unless […]

Induced Signal Susceptibility DO-160 Section 19

The Issue: Induced signal susceptibility has been a factor in electronic equipment performance since the dawning of voltage and current.  Often referred to as crosstalk, the undesired coupling of one circuit’s signals to another may result in interference that degrades the integrity of either signal.  This article examines the testing process prescribed by RTCA DO-160 […]

Review of Bonding & Grounding Requirements

The Question What is the required bonding and grounding requirements to achieve compliance with the various electromagnetic compatibility (EMC) standards associated with electronic equipment? I received this question a few days ago and quickly realized that a quick and easy answer was not feasible since I virtually had no knowledge of  what kind of equipment […]

Review of Magnetic Effects Testing—DO-160 Section 15

The Issue From the beginning of aviation, knowledge of the aircraft direction during flight has been critical to locating destinations. The magnetic compass was used for centuries in shipping, and naturally, it was adopted for aircraft use. Without visible signposts or landmarks, direction relies on the compass to provide the necessary information. The compass aligns […]