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Practical Engineering: Using Welch-Satterthwaite Formula in Uncertainty Analysis

This month's Practical Engineering explains how to use the Welch-Satterthwaite formula to calculate the effective degrees of freedom and expanded uncertainty in a measurement uncertainty analysis. It provides a practical example to demonstrate the application of this formula.

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FCC Enforcement Bureau Convenes Regulators to Discuss Emerging Trends

Officials from the Enforcement Bureau of the U.S. Federal Communications Commission (FCC) recently convened government regulators from four other...

ARRL Releases Updated Amateur Radio Handbook

The National Association for Amateur Radio (ARRL) has announced the release of an updated version of its classic guide to amateur radio technology and practice.

FDA Classifies Radiofrequency Toothbrush as Medical Device

The FDA has classified a radiofrequency-based electric toothbrush as a medical device, establishing regulations to ensure the safety and effectiveness of this emerging dental technology.

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Shielding Effectiveness Test Guide

Just as interference testing requires RF enclosures, isolation systems in turn need their own testing. This document reviews some of the issues and considerations in testing RF enclosures.

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FCC to Review Broadband Customer Support Services

The FCC will review broadband providers' customer support practices, focusing on issues like cancellations, renewals, live representative access, installations, outages, and accessibility for individuals with disabilities.

FDA Releases List of Proposed Guidances for FY 2025

The Center for Devices and Radiological Health at the U.S. Food and Drug Administration has published an extensive list of guidance documents that it intends to publish or develop in fiscal year 2025.

FCC Adopts Rules Requiring Georouting for Wireless Calls

The U.S. Federal Communications Commission has voted to adopt rules that will require U.S. wireless carriers to implement technology that will speed localized response to 988-related emergencies.

All Mobile Phones Must Be HAC, says FCC

The FCC has mandated that all mobile phones must be hearing aid compatible within 24-42 months, requiring manufacturers to include HAC technology, Bluetooth coupling, and adjustable volume controls. This change will benefit 48 million Americans with hearing loss.

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Feature Articles

EMI Shielding and Thermal Interface Considerations for Commercial and Defense Drone Technology

Electromagnetic interference (EMI) and excessive heat pose considerable risk to the proper operation of electronic systems within commercial and defense drone technology. By implementing solutions such as EMI shielding products and thermal interface materials, engineers and product designers can mitigate risks and meet regulatory requirements needed for high reliability and performance.

Navigating Mexico Electrical Safety Certification Requirements

Mexico’s regulatory compliance process for electrical safety requires constant attention because of the number of safety standards potentially applicable, exemptions based on use, limited validity periods, provision of samples for local testing, comprehensive labeling and warranty requirements, and the need to coordinate the efforts of test labs, Certification Bodies, customs house brokers, and the importer/certificate holder. By better understanding the key players and documents that make up the regulatory system, manufacturers can more easily and successfully navigate compliance.

Circuit Spacings: Determining Product Safety Requirements

Circuit spacing is a key element in minimizing electrical shock and fire risks, which is critical for safe product development. This publication provides simplified guidelines to help understand, navigate, interpret, and apply circuit spacings, contributing to a successful safety and certification experience.

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Discover new products, review technical whitepapers, read the latest compliance news, and trending engineering news.